diff --git a/.babelrc b/.babelrc index b5a939b..3da1cc0 100644 --- a/.babelrc +++ b/.babelrc @@ -4,7 +4,7 @@ "@babel/preset-env", { "targets": { - "browsers": "> 1%, not dead, not IE < 11, not OperaMini all", + "browsers": "> 1%, not dead, not IE < 11, IE 11, not OperaMini all", "node": "current" } } diff --git a/dist/shuffle.js b/dist/shuffle.js index 9e10b45..d429463 100644 --- a/dist/shuffle.js +++ b/dist/shuffle.js @@ -4,6 +4,107 @@ (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Shuffle = factory()); }(this, (function () { 'use strict'; + function _classCallCheck(instance, Constructor) { + if (!(instance instanceof Constructor)) { + throw new TypeError("Cannot call a class as a function"); + } + } + + function _defineProperties(target, props) { + for (var i = 0; i < props.length; i++) { + var descriptor = props[i]; + descriptor.enumerable = descriptor.enumerable || false; + descriptor.configurable = true; + if ("value" in descriptor) descriptor.writable = true; + Object.defineProperty(target, descriptor.key, descriptor); + } + } + + function _createClass(Constructor, protoProps, staticProps) { + if (protoProps) _defineProperties(Constructor.prototype, protoProps); + if (staticProps) _defineProperties(Constructor, staticProps); + return Constructor; + } + + function _inherits(subClass, superClass) { + if (typeof superClass !== "function" && superClass !== null) { + throw new TypeError("Super expression must either be null or a function"); + } + + subClass.prototype = Object.create(superClass && superClass.prototype, { + constructor: { + value: subClass, + writable: true, + configurable: true + } + }); + if (superClass) _setPrototypeOf(subClass, superClass); + } + + function _getPrototypeOf(o) { + _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { + return o.__proto__ || Object.getPrototypeOf(o); + }; + return _getPrototypeOf(o); + } + + function _setPrototypeOf(o, p) { + _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { + o.__proto__ = p; + return o; + }; + + return _setPrototypeOf(o, p); + } + + function _isNativeReflectConstruct() { + if (typeof Reflect === "undefined" || !Reflect.construct) return false; + if (Reflect.construct.sham) return false; + if (typeof Proxy === "function") return true; + + try { + Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); + return true; + } catch (e) { + return false; + } + } + + function _assertThisInitialized(self) { + if (self === void 0) { + throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); + } + + return self; + } + + function _possibleConstructorReturn(self, call) { + if (call && (typeof call === "object" || typeof call === "function")) { + return call; + } + + return _assertThisInitialized(self); + } + + function _createSuper(Derived) { + var hasNativeReflectConstruct = _isNativeReflectConstruct(); + + return function _createSuperInternal() { + var Super = _getPrototypeOf(Derived), + result; + + if (hasNativeReflectConstruct) { + var NewTarget = _getPrototypeOf(this).constructor; + + result = Reflect.construct(Super, arguments, NewTarget); + } else { + result = Super.apply(this, arguments); + } + + return _possibleConstructorReturn(this, result); + }; + } + function E () { // Keep this empty so it's easier to inherit from // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3) @@ -184,13 +285,15 @@ return parseFloat(value) || 0; } - class Point { + var Point = /*#__PURE__*/function () { /** * Represents a coordinate pair. * @param {number} [x=0] X. * @param {number} [y=0] Y. */ - constructor(x, y) { + function Point(x, y) { + _classCallCheck(this, Point); + this.x = getNumber(x); this.y = getNumber(y); } @@ -202,13 +305,17 @@ */ - static equals(a, b) { - return a.x === b.x && a.y === b.y; - } + _createClass(Point, null, [{ + key: "equals", + value: function equals(a, b) { + return a.x === b.x && a.y === b.y; + } + }]); - } + return Point; + }(); - class Rect { + var Rect = /*#__PURE__*/function () { /** * Class for representing rectangular regions. * https://github.com/google/closure-library/blob/master/closure/goog/math/rect.js @@ -219,7 +326,9 @@ * @param {number} id Identifier * @constructor */ - constructor(x, y, w, h, id) { + function Rect(x, y, w, h, id) { + _classCallCheck(this, Rect); + this.id = id; /** @type {number} */ @@ -242,11 +351,15 @@ */ - static intersects(a, b) { - return a.left < b.left + b.width && b.left < a.left + a.width && a.top < b.top + b.height && b.top < a.top + a.height; - } + _createClass(Rect, null, [{ + key: "intersects", + value: function intersects(a, b) { + return a.left < b.left + b.width && b.left < a.left + a.width && a.top < b.top + b.height && b.top < a.top + a.height; + } + }]); - } + return Rect; + }(); var Classes = { BASE: 'shuffle', @@ -255,10 +368,12 @@ HIDDEN: 'shuffle-item--hidden' }; - let id$1 = 0; + var id$1 = 0; + + var ShuffleItem = /*#__PURE__*/function () { + function ShuffleItem(element, isRTL) { + _classCallCheck(this, ShuffleItem); - class ShuffleItem { - constructor(element, isRTL) { id$1 += 1; this.id = id$1; this.element = element; @@ -282,53 +397,69 @@ this.isHidden = false; } - show() { - this.isVisible = true; - this.element.classList.remove(Classes.HIDDEN); - this.element.classList.add(Classes.VISIBLE); - this.element.removeAttribute('aria-hidden'); - } - - hide() { - this.isVisible = false; - this.element.classList.remove(Classes.VISIBLE); - this.element.classList.add(Classes.HIDDEN); - this.element.setAttribute('aria-hidden', true); - } - - init() { - this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]); - this.applyCss(ShuffleItem.Css.INITIAL); - this.applyCss(this.isRTL ? ShuffleItem.Css.DIRECTION.rtl : ShuffleItem.Css.DIRECTION.ltr); - this.scale = ShuffleItem.Scale.VISIBLE; - this.point = new Point(); - } - - addClasses(classes) { - classes.forEach(className => { - this.element.classList.add(className); - }); - } + _createClass(ShuffleItem, [{ + key: "show", + value: function show() { + this.isVisible = true; + this.element.classList.remove(Classes.HIDDEN); + this.element.classList.add(Classes.VISIBLE); + this.element.removeAttribute('aria-hidden'); + } + }, { + key: "hide", + value: function hide() { + this.isVisible = false; + this.element.classList.remove(Classes.VISIBLE); + this.element.classList.add(Classes.HIDDEN); + this.element.setAttribute('aria-hidden', true); + } + }, { + key: "init", + value: function init() { + this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]); + this.applyCss(ShuffleItem.Css.INITIAL); + this.applyCss(this.isRTL ? ShuffleItem.Css.DIRECTION.rtl : ShuffleItem.Css.DIRECTION.ltr); + this.scale = ShuffleItem.Scale.VISIBLE; + this.point = new Point(); + } + }, { + key: "addClasses", + value: function addClasses(classes) { + var _this = this; - removeClasses(classes) { - classes.forEach(className => { - this.element.classList.remove(className); - }); - } + classes.forEach(function (className) { + _this.element.classList.add(className); + }); + } + }, { + key: "removeClasses", + value: function removeClasses(classes) { + var _this2 = this; - applyCss(obj) { - Object.keys(obj).forEach(key => { - this.element.style[key] = obj[key]; - }); - } + classes.forEach(function (className) { + _this2.element.classList.remove(className); + }); + } + }, { + key: "applyCss", + value: function applyCss(obj) { + var _this3 = this; - dispose() { - this.removeClasses([Classes.HIDDEN, Classes.VISIBLE, Classes.SHUFFLE_ITEM]); - this.element.removeAttribute('style'); - this.element = null; - } + Object.keys(obj).forEach(function (key) { + _this3.element.style[key] = obj[key]; + }); + } + }, { + key: "dispose", + value: function dispose() { + this.removeClasses([Classes.HIDDEN, Classes.VISIBLE, Classes.SHUFFLE_ITEM]); + this.element.removeAttribute('style'); + this.element = null; + } + }]); - } + return ShuffleItem; + }(); ShuffleItem.Css = { INITIAL: { @@ -369,14 +500,14 @@ HIDDEN: 0.001 }; - let value = null; - var testComputedSize = (() => { + var value = null; + var testComputedSize = (function () { if (value !== null) { return value; } - const element = document.body || document.documentElement; - const e = document.createElement('div'); + var element = document.body || document.documentElement; + var e = document.createElement('div'); e.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;'; element.appendChild(e); value = window.getComputedStyle(e, null).width === '10px'; @@ -395,8 +526,9 @@ * the computed style. */ - function getNumberStyle(element, style, styles = window.getComputedStyle(element, null)) { - let value = getNumber(styles[style]); // Support IE<=11 and W3C spec. + function getNumberStyle(element, style) { + var styles = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : window.getComputedStyle(element, null); + var value = getNumber(styles[style]); // Support IE<=11 and W3C spec. if (!testComputedSize() && style === 'width') { value += getNumber(styles.paddingLeft) + getNumber(styles.paddingRight) + getNumber(styles.borderLeftWidth) + getNumber(styles.borderRightWidth); @@ -415,12 +547,12 @@ * @return {Array} Randomly sorted array. */ function randomize(array) { - let n = array.length; + var n = array.length; while (n) { n -= 1; - const i = Math.floor(Math.random() * (n + 1)); - const temp = array[i]; + var i = Math.floor(Math.random() * (n + 1)); + var temp = array[i]; array[i] = array[n]; array[n] = temp; } @@ -428,7 +560,7 @@ return array; } - const defaults = { + var defaults = { // Use array.reverse() to reverse the results reverse: false, // Sorting function @@ -450,9 +582,9 @@ function sorter(arr, options) { // eslint-disable-next-line prefer-object-spread - const opts = Object.assign({}, defaults, options); - const original = Array.from(arr); - let revert = false; + var opts = Object.assign({}, defaults, options); + var original = Array.from(arr); + var revert = false; if (!arr.length) { return []; @@ -465,14 +597,14 @@ if (typeof opts.by === 'function') { - arr.sort((a, b) => { + arr.sort(function (a, b) { // Exit early if we already know we want to revert if (revert) { return 0; } - const valA = opts.by(a[opts.key]); - const valB = opts.by(b[opts.key]); // If both values are undefined, use the DOM order + var valA = opts.by(a[opts.key]); + var valB = opts.by(b[opts.key]); // If both values are undefined, use the DOM order if (valA === undefined && valB === undefined) { revert = true; @@ -505,9 +637,9 @@ return arr; } - const transitions = {}; - const eventName = 'transitionend'; - let count = 0; + var transitions = {}; + var eventName = 'transitionend'; + var count = 0; function uniqueId() { count += 1; @@ -524,9 +656,9 @@ return false; } function onTransitionEnd(element, callback) { - const id = uniqueId(); + var id = uniqueId(); - const listener = evt => { + var listener = function listener(evt) { if (evt.currentTarget === evt.target) { cancelTransitionEnd(id); callback(evt); @@ -535,8 +667,8 @@ element.addEventListener(eventName, listener); transitions[id] = { - element, - listener + element: element, + listener: listener }; return id; } @@ -559,7 +691,7 @@ */ function getColumnSpan(itemWidth, columnWidth, columns, threshold) { - let columnSpan = itemWidth / columnWidth; // If the difference between the rounded column span number and the + var columnSpan = itemWidth / columnWidth; // If the difference between the rounded column span number and the // calculated column span number is really small, round the number to // make it fit. @@ -606,9 +738,9 @@ // [10, 20, 10, 0] => [20, 20, 10] => 10 - const available = []; // For how many possible positions for this item there are. + var available = []; // For how many possible positions for this item there are. - for (let i = 0; i <= columns - columnSpan; i++) { + for (var i = 0; i <= columns - columnSpan; i++) { // Find the bigger value for each place it could fit. available.push(arrayMax(positions.slice(i, i + columnSpan))); } @@ -625,9 +757,9 @@ */ function getShortColumn(positions, buffer) { - const minPosition = arrayMin(positions); + var minPosition = arrayMin(positions); - for (let i = 0, len = positions.length; i < len; i++) { + for (var i = 0, len = positions.length; i < len; i++) { if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) { return i; } @@ -646,25 +778,24 @@ * @return {Point} */ - function getItemPosition({ - itemSize, - positions, - gridSize, - total, - threshold, - buffer - }) { - const span = getColumnSpan(itemSize.width, gridSize, total, threshold); - const setY = getAvailablePositions(positions, span, total); - const shortColumnIndex = getShortColumn(setY, buffer); // Position the item - - const point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]); // Update the columns array with the new values for each column. + function getItemPosition(_ref) { + var itemSize = _ref.itemSize, + positions = _ref.positions, + gridSize = _ref.gridSize, + total = _ref.total, + threshold = _ref.threshold, + buffer = _ref.buffer; + var span = getColumnSpan(itemSize.width, gridSize, total, threshold); + var setY = getAvailablePositions(positions, span, total); + var shortColumnIndex = getShortColumn(setY, buffer); // Position the item + + var point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]); // Update the columns array with the new values for each column. // e.g. before the update the columns could be [250, 0, 0, 0] for an item // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0]. - const setHeight = setY[shortColumnIndex] + itemSize.height; + var setHeight = setY[shortColumnIndex] + itemSize.height; - for (let i = 0; i < span; i++) { + for (var i = 0; i < span; i++) { positions[shortColumnIndex + i] = setHeight; } @@ -680,11 +811,11 @@ */ function getCenteredPositions(itemRects, containerWidth) { - const rowMap = {}; // Populate rows by their offset because items could jump between rows like: + var rowMap = {}; // Populate rows by their offset because items could jump between rows like: // a c // bbb - itemRects.forEach(itemRect => { + itemRects.forEach(function (itemRect) { if (rowMap[itemRect.top]) { // Push the point to the last row array. rowMap[itemRect.top].push(itemRect); @@ -696,24 +827,26 @@ // the remaining space by dividing it by 2. Then add that // offset to the x position of each point. - let rects = []; - const rows = []; - const centeredRows = []; - Object.keys(rowMap).forEach(key => { - const itemRects = rowMap[key]; + var rects = []; + var rows = []; + var centeredRows = []; + Object.keys(rowMap).forEach(function (key) { + var itemRects = rowMap[key]; rows.push(itemRects); - const lastItem = itemRects[itemRects.length - 1]; - const end = lastItem.left + lastItem.width; - const offset = Math.round((containerWidth - end) / 2); - let finalRects = itemRects; - let canMove = false; + var lastItem = itemRects[itemRects.length - 1]; + var end = lastItem.left + lastItem.width; + var offset = Math.round((containerWidth - end) / 2); + var finalRects = itemRects; + var canMove = false; if (offset > 0) { - const newRects = []; - canMove = itemRects.every(r => { - const newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id); // Check all current rects to make sure none overlap. + var newRects = []; + canMove = itemRects.every(function (r) { + var newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id); // Check all current rects to make sure none overlap. - const noOverlap = !rects.some(r => Rect.intersects(newRect, r)); + var noOverlap = !rects.some(function (r) { + return Rect.intersects(newRect, r); + }); newRects.push(newRect); return noOverlap; }); // If none of the rectangles overlapped, the whole group can be centered. @@ -727,19 +860,23 @@ if (!canMove) { - let intersectingRect; - const hasOverlap = itemRects.some(itemRect => rects.some(r => { - const intersects = Rect.intersects(itemRect, r); + var intersectingRect; + var hasOverlap = itemRects.some(function (itemRect) { + return rects.some(function (r) { + var intersects = Rect.intersects(itemRect, r); - if (intersects) { - intersectingRect = r; - } + if (intersects) { + intersectingRect = r; + } - return intersects; - })); // If there is any overlap, replace the overlapping row with the original. + return intersects; + }); + }); // If there is any overlap, replace the overlapping row with the original. if (hasOverlap) { - const rowIndex = centeredRows.findIndex(items => items.includes(intersectingRect)); + var rowIndex = centeredRows.findIndex(function (items) { + return items.includes(intersectingRect); + }); centeredRows.splice(rowIndex, 1, rows[rowIndex]); } } @@ -752,7 +889,11 @@ // Remove the wrapper object with index, map to a Point. return [].concat.apply([], centeredRows) // eslint-disable-line prefer-spread - .sort((a, b) => a.id - b.id).map(itemRect => new Point(itemRect.left, itemRect.top)); + .sort(function (a, b) { + return a.id - b.id; + }).map(function (itemRect) { + return new Point(itemRect.left, itemRect.top); + }); } /** @@ -762,7 +903,9 @@ * @return {string} The hyphenated string. */ function hyphenate(str) { - return str.replace(/([A-Z])/g, (str, m1) => `-${m1.toLowerCase()}`); + return str.replace(/([A-Z])/g, function (str, m1) { + return "-".concat(m1.toLowerCase()); + }); } function arrayUnique(x) { @@ -770,9 +913,13 @@ } // Used for unique instance variables - let id = 0; + var id = 0; + + var Shuffle = /*#__PURE__*/function (_TinyEmitter) { + _inherits(Shuffle, _TinyEmitter); + + var _super = _createSuper(Shuffle); - class Shuffle extends tinyEmitter { /** * Categorize, sort, and filter a responsive grid of items. * @@ -780,1109 +927,1231 @@ * @param {Object} [options=Shuffle.options] Options object. * @constructor */ - constructor(element, options = {}) { - super(); // eslint-disable-next-line prefer-object-spread + function Shuffle(element) { + var _this; + + var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {}; + + _classCallCheck(this, Shuffle); + + _this = _super.call(this); // eslint-disable-next-line prefer-object-spread - this.options = Object.assign({}, Shuffle.options, options); // Allow misspelling of delimiter since that's how it used to be. + _this.options = Object.assign({}, Shuffle.options, options); // Allow misspelling of delimiter since that's how it used to be. // Remove in v6. - if (this.options.delimeter) { - this.options.delimiter = this.options.delimeter; + if (_this.options.delimeter) { + _this.options.delimiter = _this.options.delimeter; } - this.lastSort = {}; - this.group = Shuffle.ALL_ITEMS; - this.lastFilter = Shuffle.ALL_ITEMS; - this.isEnabled = true; - this.isDestroyed = false; - this.isInitialized = false; - this._transitions = []; - this.isTransitioning = false; - this._queue = []; + _this.lastSort = {}; + _this.group = Shuffle.ALL_ITEMS; + _this.lastFilter = Shuffle.ALL_ITEMS; + _this.isEnabled = true; + _this.isDestroyed = false; + _this.isInitialized = false; + _this._transitions = []; + _this.isTransitioning = false; + _this._queue = []; - const el = this._getElementOption(element); + var el = _this._getElementOption(element); if (!el) { throw new TypeError('Shuffle needs to be initialized with an element.'); } - this.element = el; - this.id = 'shuffle_' + id; + _this.element = el; + _this.id = 'shuffle_' + id; id += 1; - this._init(); + _this._init(); - this.isInitialized = true; + _this.isInitialized = true; + return _this; } - _init() { - this.items = this._getItems(); - this.options.sizer = this._getElementOption(this.options.sizer); // Add class and invalidate styles + _createClass(Shuffle, [{ + key: "_init", + value: function _init() { + this.items = this._getItems(); + this.options.sizer = this._getElementOption(this.options.sizer); // Add class and invalidate styles - this.element.classList.add(Shuffle.Classes.BASE); // Set initial css for each item + this.element.classList.add(Shuffle.Classes.BASE); // Set initial css for each item - this._initItems(this.items); // Bind resize events + this._initItems(this.items); // Bind resize events - this._onResize = this._getResizeFunction(); - window.addEventListener('resize', this._onResize); // If the page has not already emitted the `load` event, call layout on load. - // This avoids layout issues caused by images and fonts loading after the - // instance has been initialized. - - if (document.readyState !== 'complete') { - const layout = this.layout.bind(this); - window.addEventListener('load', function onLoad() { - window.removeEventListener('load', onLoad); - layout(); - }); - } // Get container css all in one request. Causes reflow + this._onResize = this._getResizeFunction(); + window.addEventListener('resize', this._onResize); // If the page has not already emitted the `load` event, call layout on load. + // This avoids layout issues caused by images and fonts loading after the + // instance has been initialized. + if (document.readyState !== 'complete') { + var layout = this.layout.bind(this); + window.addEventListener('load', function onLoad() { + window.removeEventListener('load', onLoad); + layout(); + }); + } // Get container css all in one request. Causes reflow - const containerCss = window.getComputedStyle(this.element, null); - const containerWidth = Shuffle.getSize(this.element).width; // Add styles to the container if it doesn't have them. - this._validateStyles(containerCss); // We already got the container's width above, no need to cause another - // reflow getting it again... Calculate the number of columns there will be + var containerCss = window.getComputedStyle(this.element, null); + var containerWidth = Shuffle.getSize(this.element).width; // Add styles to the container if it doesn't have them. + this._validateStyles(containerCss); // We already got the container's width above, no need to cause another + // reflow getting it again... Calculate the number of columns there will be - this._setColumns(containerWidth); // Kick off! + this._setColumns(containerWidth); // Kick off! - this.filter(this.options.group, this.options.initialSort); // The shuffle items haven't had transitions set on them yet so the user - // doesn't see the first layout. Set them now that the first layout is done. - // First, however, a synchronous layout must be caused for the previous - // styles to be applied without transitions. - this.element.offsetWidth; // eslint-disable-line no-unused-expressions + this.filter(this.options.group, this.options.initialSort); // The shuffle items haven't had transitions set on them yet so the user + // doesn't see the first layout. Set them now that the first layout is done. + // First, however, a synchronous layout must be caused for the previous + // styles to be applied without transitions. - this.setItemTransitions(this.items); - this.element.style.transition = `height ${this.options.speed}ms ${this.options.easing}`; - } - /** - * Returns a throttled and proxied function for the resize handler. - * @return {function} - * @private - */ + this.element.offsetWidth; // eslint-disable-line no-unused-expressions + this.setItemTransitions(this.items); + this.element.style.transition = "height ".concat(this.options.speed, "ms ").concat(this.options.easing); + } + /** + * Returns a throttled and proxied function for the resize handler. + * @return {function} + * @private + */ - _getResizeFunction() { - const resizeFunction = this._handleResize.bind(this); + }, { + key: "_getResizeFunction", + value: function _getResizeFunction() { + var resizeFunction = this._handleResize.bind(this); - return this.options.throttle ? this.options.throttle(resizeFunction, this.options.throttleTime) : resizeFunction; - } - /** - * Retrieve an element from an option. - * @param {string|jQuery|Element} option The option to check. - * @return {?Element} The plain element or null. - * @private - */ + return this.options.throttle ? this.options.throttle(resizeFunction, this.options.throttleTime) : resizeFunction; + } + /** + * Retrieve an element from an option. + * @param {string|jQuery|Element} option The option to check. + * @return {?Element} The plain element or null. + * @private + */ + }, { + key: "_getElementOption", + value: function _getElementOption(option) { + // If column width is a string, treat is as a selector and search for the + // sizer element within the outermost container + if (typeof option === 'string') { + return this.element.querySelector(option); + } // Check for an element - _getElementOption(option) { - // If column width is a string, treat is as a selector and search for the - // sizer element within the outermost container - if (typeof option === 'string') { - return this.element.querySelector(option); - } // Check for an element + if (option && option.nodeType && option.nodeType === 1) { + return option; + } // Check for jQuery object - if (option && option.nodeType && option.nodeType === 1) { - return option; - } // Check for jQuery object + if (option && option.jquery) { + return option[0]; + } - if (option && option.jquery) { - return option[0]; + return null; } + /** + * Ensures the shuffle container has the css styles it needs applied to it. + * @param {Object} styles Key value pairs for position and overflow. + * @private + */ - return null; - } - /** - * Ensures the shuffle container has the css styles it needs applied to it. - * @param {Object} styles Key value pairs for position and overflow. - * @private - */ - - - _validateStyles(styles) { - // Position cannot be static. - if (styles.position === 'static') { - this.element.style.position = 'relative'; - } // Overflow has to be hidden. + }, { + key: "_validateStyles", + value: function _validateStyles(styles) { + // Position cannot be static. + if (styles.position === 'static') { + this.element.style.position = 'relative'; + } // Overflow has to be hidden. - if (styles.overflow !== 'hidden') { - this.element.style.overflow = 'hidden'; + if (styles.overflow !== 'hidden') { + this.element.style.overflow = 'hidden'; + } } - } - /** - * Filter the elements by a category. - * @param {string|string[]|function(Element):boolean} [category] Category to - * filter by. If it's given, the last category will be used to filter the items. - * @param {Array} [collection] Optionally filter a collection. Defaults to - * all the items. - * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}} - * @private - */ + /** + * Filter the elements by a category. + * @param {string|string[]|function(Element):boolean} [category] Category to + * filter by. If it's given, the last category will be used to filter the items. + * @param {Array} [collection] Optionally filter a collection. Defaults to + * all the items. + * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}} + * @private + */ + }, { + key: "_filter", + value: function _filter() { + var category = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.lastFilter; + var collection = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.items; - _filter(category = this.lastFilter, collection = this.items) { - const set = this._getFilteredSets(category, collection); // Individually add/remove hidden/visible classes + var set = this._getFilteredSets(category, collection); // Individually add/remove hidden/visible classes - this._toggleFilterClasses(set); // Save the last filter in case elements are appended. + this._toggleFilterClasses(set); // Save the last filter in case elements are appended. - this.lastFilter = category; // This is saved mainly because providing a filter function (like searching) - // will overwrite the `lastFilter` property every time its called. + this.lastFilter = category; // This is saved mainly because providing a filter function (like searching) + // will overwrite the `lastFilter` property every time its called. + + if (typeof category === 'string') { + this.group = category; + } - if (typeof category === 'string') { - this.group = category; + return set; } + /** + * Returns an object containing the visible and hidden elements. + * @param {string|string[]|function(Element):boolean} category Category or function to filter by. + * @param {ShuffleItem[]} items A collection of items to filter. + * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}} + * @private + */ - return set; - } - /** - * Returns an object containing the visible and hidden elements. - * @param {string|string[]|function(Element):boolean} category Category or function to filter by. - * @param {ShuffleItem[]} items A collection of items to filter. - * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}} - * @private - */ + }, { + key: "_getFilteredSets", + value: function _getFilteredSets(category, items) { + var _this2 = this; + var visible = []; + var hidden = []; // category === 'all', add visible class to everything - _getFilteredSets(category, items) { - let visible = []; - const hidden = []; // category === 'all', add visible class to everything + if (category === Shuffle.ALL_ITEMS) { + visible = items; // Loop through each item and use provided function to determine + // whether to hide it or not. + } else { + items.forEach(function (item) { + if (_this2._doesPassFilter(category, item.element)) { + visible.push(item); + } else { + hidden.push(item); + } + }); + } - if (category === Shuffle.ALL_ITEMS) { - visible = items; // Loop through each item and use provided function to determine - // whether to hide it or not. - } else { - items.forEach(item => { - if (this._doesPassFilter(category, item.element)) { - visible.push(item); - } else { - hidden.push(item); - } - }); + return { + visible: visible, + hidden: hidden + }; } + /** + * Test an item to see if it passes a category. + * @param {string|string[]|function():boolean} category Category or function to filter by. + * @param {Element} element An element to test. + * @return {boolean} Whether it passes the category/filter. + * @private + */ + + }, { + key: "_doesPassFilter", + value: function _doesPassFilter(category, element) { + if (typeof category === 'function') { + return category.call(element, element, this); + } // Check each element's data-groups attribute against the given category. - return { - visible, - hidden - }; - } - /** - * Test an item to see if it passes a category. - * @param {string|string[]|function():boolean} category Category or function to filter by. - * @param {Element} element An element to test. - * @return {boolean} Whether it passes the category/filter. - * @private - */ + var attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY); + var keys = this.options.delimiter ? attr.split(this.options.delimiter) : JSON.parse(attr); - _doesPassFilter(category, element) { - if (typeof category === 'function') { - return category.call(element, element, this); - } // Check each element's data-groups attribute against the given category. + function testCategory(category) { + return keys.includes(category); + } + if (Array.isArray(category)) { + if (this.options.filterMode === Shuffle.FilterMode.ANY) { + return category.some(testCategory); + } - const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY); - const keys = this.options.delimiter ? attr.split(this.options.delimiter) : JSON.parse(attr); + return category.every(testCategory); + } - function testCategory(category) { return keys.includes(category); } + /** + * Toggles the visible and hidden class names. + * @param {{visible, hidden}} Object with visible and hidden arrays. + * @private + */ - if (Array.isArray(category)) { - if (this.options.filterMode === Shuffle.FilterMode.ANY) { - return category.some(testCategory); - } + }, { + key: "_toggleFilterClasses", + value: function _toggleFilterClasses(_ref) { + var visible = _ref.visible, + hidden = _ref.hidden; + visible.forEach(function (item) { + item.show(); + }); + hidden.forEach(function (item) { + item.hide(); + }); + } + /** + * Set the initial css for each item + * @param {ShuffleItem[]} items Set to initialize. + * @private + */ - return category.every(testCategory); + }, { + key: "_initItems", + value: function _initItems(items) { + items.forEach(function (item) { + item.init(); + }); } + /** + * Remove element reference and styles. + * @param {ShuffleItem[]} items Set to dispose. + * @private + */ - return keys.includes(category); - } - /** - * Toggles the visible and hidden class names. - * @param {{visible, hidden}} Object with visible and hidden arrays. - * @private - */ + }, { + key: "_disposeItems", + value: function _disposeItems(items) { + items.forEach(function (item) { + item.dispose(); + }); + } + /** + * Updates the visible item count. + * @private + */ + }, { + key: "_updateItemCount", + value: function _updateItemCount() { + this.visibleItems = this._getFilteredItems().length; + } + /** + * Sets css transform transition on a group of elements. This is not executed + * at the same time as `item.init` so that transitions don't occur upon + * initialization of a new Shuffle instance. + * @param {ShuffleItem[]} items Shuffle items to set transitions on. + * @protected + */ - _toggleFilterClasses({ - visible, - hidden - }) { - visible.forEach(item => { - item.show(); - }); - hidden.forEach(item => { - item.hide(); - }); - } - /** - * Set the initial css for each item - * @param {ShuffleItem[]} items Set to initialize. - * @private - */ + }, { + key: "setItemTransitions", + value: function setItemTransitions(items) { + var _this$options = this.options, + speed = _this$options.speed, + easing = _this$options.easing; + var positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left']; // Allow users to transtion other properties if they exist in the `before` + // css mapping of the shuffle item. + + var cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map(function (k) { + return hyphenate(k); + }); + var properties = positionProps.concat(cssProps).join(); + items.forEach(function (item) { + item.element.style.transitionDuration = speed + 'ms'; + item.element.style.transitionTimingFunction = easing; + item.element.style.transitionProperty = properties; + }); + } + }, { + key: "_getItems", + value: function _getItems() { + var _this3 = this; + + return Array.from(this.element.children).filter(function (el) { + return matchesSelector(el, _this3.options.itemSelector); + }).map(function (el) { + return new ShuffleItem(el, _this3.options.isRTL); + }); + } + /** + * Combine the current items array with a new one and sort it by DOM order. + * @param {ShuffleItem[]} items Items to track. + * @return {ShuffleItem[]} + */ + }, { + key: "_mergeNewItems", + value: function _mergeNewItems(items) { + var children = Array.from(this.element.children); + return sorter(this.items.concat(items), { + by: function by(element) { + return children.indexOf(element); + } + }); + } + }, { + key: "_getFilteredItems", + value: function _getFilteredItems() { + return this.items.filter(function (item) { + return item.isVisible; + }); + } + }, { + key: "_getConcealedItems", + value: function _getConcealedItems() { + return this.items.filter(function (item) { + return !item.isVisible; + }); + } + /** + * Returns the column size, based on column width and sizer options. + * @param {number} containerWidth Size of the parent container. + * @param {number} gutterSize Size of the gutters. + * @return {number} + * @private + */ - _initItems(items) { - items.forEach(item => { - item.init(); - }); - } - /** - * Remove element reference and styles. - * @param {ShuffleItem[]} items Set to dispose. - * @private - */ + }, { + key: "_getColumnSize", + value: function _getColumnSize(containerWidth, gutterSize) { + var size; // If the columnWidth property is a function, then the grid is fluid + + if (typeof this.options.columnWidth === 'function') { + size = this.options.columnWidth(containerWidth); // columnWidth option isn't a function, are they using a sizing element? + } else if (this.options.sizer) { + size = Shuffle.getSize(this.options.sizer).width; // if not, how about the explicitly set option? + } else if (this.options.columnWidth) { + size = this.options.columnWidth; // or use the size of the first item + } else if (this.items.length > 0) { + size = Shuffle.getSize(this.items[0].element, true).width; // if there's no items, use size of container + } else { + size = containerWidth; + } // Don't let them set a column width of zero. - _disposeItems(items) { - items.forEach(item => { - item.dispose(); - }); - } - /** - * Updates the visible item count. - * @private - */ + if (size === 0) { + size = containerWidth; + } + return size + gutterSize; + } + /** + * Returns the gutter size, based on gutter width and sizer options. + * @param {number} containerWidth Size of the parent container. + * @return {number} + * @private + */ - _updateItemCount() { - this.visibleItems = this._getFilteredItems().length; - } - /** - * Sets css transform transition on a group of elements. This is not executed - * at the same time as `item.init` so that transitions don't occur upon - * initialization of a new Shuffle instance. - * @param {ShuffleItem[]} items Shuffle items to set transitions on. - * @protected - */ + }, { + key: "_getGutterSize", + value: function _getGutterSize(containerWidth) { + var size; + if (typeof this.options.gutterWidth === 'function') { + size = this.options.gutterWidth(containerWidth); + } else if (this.options.sizer) { + size = getNumberStyle(this.options.sizer, 'marginLeft'); + } else { + size = this.options.gutterWidth; + } - setItemTransitions(items) { - const { - speed, - easing - } = this.options; - const positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left']; // Allow users to transtion other properties if they exist in the `before` - // css mapping of the shuffle item. - - const cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map(k => hyphenate(k)); - const properties = positionProps.concat(cssProps).join(); - items.forEach(item => { - item.element.style.transitionDuration = speed + 'ms'; - item.element.style.transitionTimingFunction = easing; - item.element.style.transitionProperty = properties; - }); - } + return size; + } + /** + * Calculate the number of columns to be used. Gets css if using sizer element. + * @param {number} [containerWidth] Optionally specify a container width if + * it's already available. + */ - _getItems() { - return Array.from(this.element.children).filter(el => matchesSelector(el, this.options.itemSelector)).map(el => new ShuffleItem(el, this.options.isRTL)); - } - /** - * Combine the current items array with a new one and sort it by DOM order. - * @param {ShuffleItem[]} items Items to track. - * @return {ShuffleItem[]} - */ + }, { + key: "_setColumns", + value: function _setColumns() { + var containerWidth = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : Shuffle.getSize(this.element).width; + + var gutter = this._getGutterSize(containerWidth); + var columnWidth = this._getColumnSize(containerWidth, gutter); - _mergeNewItems(items) { - const children = Array.from(this.element.children); - return sorter(this.items.concat(items), { - by(element) { - return children.indexOf(element); + var calculatedColumns = (containerWidth + gutter) / columnWidth; // Widths given from getStyles are not precise enough... + + if (Math.abs(Math.round(calculatedColumns) - calculatedColumns) < this.options.columnThreshold) { + // e.g. calculatedColumns = 11.998876 + calculatedColumns = Math.round(calculatedColumns); } - }); - } + this.cols = Math.max(Math.floor(calculatedColumns || 0), 1); + this.containerWidth = containerWidth; + this.colWidth = columnWidth; + } + /** + * Adjust the height of the grid + */ - _getFilteredItems() { - return this.items.filter(item => item.isVisible); - } + }, { + key: "_setContainerSize", + value: function _setContainerSize() { + this.element.style.height = this._getContainerSize() + 'px'; + } + /** + * Based on the column heights, it returns the biggest one. + * @return {number} + * @private + */ - _getConcealedItems() { - return this.items.filter(item => !item.isVisible); - } - /** - * Returns the column size, based on column width and sizer options. - * @param {number} containerWidth Size of the parent container. - * @param {number} gutterSize Size of the gutters. - * @return {number} - * @private - */ + }, { + key: "_getContainerSize", + value: function _getContainerSize() { + return arrayMax(this.positions); + } + /** + * Get the clamped stagger amount. + * @param {number} index Index of the item to be staggered. + * @return {number} + */ + }, { + key: "_getStaggerAmount", + value: function _getStaggerAmount(index) { + return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax); + } + /** + * Emit an event from this instance. + * @param {string} name Event name. + * @param {Object} [data={}] Optional object data. + */ - _getColumnSize(containerWidth, gutterSize) { - let size; // If the columnWidth property is a function, then the grid is fluid + }, { + key: "_dispatch", + value: function _dispatch(name) { + var data = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {}; - if (typeof this.options.columnWidth === 'function') { - size = this.options.columnWidth(containerWidth); // columnWidth option isn't a function, are they using a sizing element? - } else if (this.options.sizer) { - size = Shuffle.getSize(this.options.sizer).width; // if not, how about the explicitly set option? - } else if (this.options.columnWidth) { - size = this.options.columnWidth; // or use the size of the first item - } else if (this.items.length > 0) { - size = Shuffle.getSize(this.items[0].element, true).width; // if there's no items, use size of container - } else { - size = containerWidth; - } // Don't let them set a column width of zero. + if (this.isDestroyed) { + return; + } + + data.shuffle = this; + this.emit(name, data); + } + /** + * Zeros out the y columns array, which is used to determine item placement. + * @private + */ + }, { + key: "_resetCols", + value: function _resetCols() { + var i = this.cols; + this.positions = []; - if (size === 0) { - size = containerWidth; + while (i) { + i -= 1; + this.positions.push(0); + } } + /** + * Loops through each item that should be shown and calculates the x, y position. + * @param {ShuffleItem[]} items Array of items that will be shown/layed + * out in order in their array. + */ - return size + gutterSize; - } - /** - * Returns the gutter size, based on gutter width and sizer options. - * @param {number} containerWidth Size of the parent container. - * @return {number} - * @private - */ + }, { + key: "_layout", + value: function _layout(items) { + var _this4 = this; + var itemPositions = this._getNextPositions(items); - _getGutterSize(containerWidth) { - let size; + var count = 0; + items.forEach(function (item, i) { + function callback() { + item.applyCss(ShuffleItem.Css.VISIBLE.after); + } // If the item will not change its position, do not add it to the render + // queue. Transitions don't fire when setting a property to the same value. - if (typeof this.options.gutterWidth === 'function') { - size = this.options.gutterWidth(containerWidth); - } else if (this.options.sizer) { - size = getNumberStyle(this.options.sizer, 'marginLeft'); - } else { - size = this.options.gutterWidth; - } - return size; - } - /** - * Calculate the number of columns to be used. Gets css if using sizer element. - * @param {number} [containerWidth] Optionally specify a container width if - * it's already available. - */ + if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) { + item.applyCss(ShuffleItem.Css.VISIBLE.before); + callback(); + return; + } + item.point = itemPositions[i]; + item.scale = ShuffleItem.Scale.VISIBLE; + item.isHidden = false; // Clone the object so that the `before` object isn't modified when the + // transition delay is added. - _setColumns(containerWidth = Shuffle.getSize(this.element).width) { - const gutter = this._getGutterSize(containerWidth); + var styles = _this4.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before); - const columnWidth = this._getColumnSize(containerWidth, gutter); + styles.transitionDelay = _this4._getStaggerAmount(count) + 'ms'; - let calculatedColumns = (containerWidth + gutter) / columnWidth; // Widths given from getStyles are not precise enough... + _this4._queue.push({ + item: item, + styles: styles, + callback: callback + }); - if (Math.abs(Math.round(calculatedColumns) - calculatedColumns) < this.options.columnThreshold) { - // e.g. calculatedColumns = 11.998876 - calculatedColumns = Math.round(calculatedColumns); + count += 1; + }); } + /** + * Return an array of Point instances representing the future positions of + * each item. + * @param {ShuffleItem[]} items Array of sorted shuffle items. + * @return {Point[]} + * @private + */ - this.cols = Math.max(Math.floor(calculatedColumns || 0), 1); - this.containerWidth = containerWidth; - this.colWidth = columnWidth; - } - /** - * Adjust the height of the grid - */ + }, { + key: "_getNextPositions", + value: function _getNextPositions(items) { + var _this5 = this; + // If position data is going to be changed, add the item's size to the + // transformer to allow for calculations. + if (this.options.isCentered) { + var itemsData = items.map(function (item, i) { + var itemSize = Shuffle.getSize(item.element, true); - _setContainerSize() { - this.element.style.height = this._getContainerSize() + 'px'; - } - /** - * Based on the column heights, it returns the biggest one. - * @return {number} - * @private - */ + var point = _this5._getItemPosition(itemSize); - - _getContainerSize() { - return arrayMax(this.positions); - } - /** - * Get the clamped stagger amount. - * @param {number} index Index of the item to be staggered. - * @return {number} - */ - - - _getStaggerAmount(index) { - return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax); - } - /** - * Emit an event from this instance. - * @param {string} name Event name. - * @param {Object} [data={}] Optional object data. - */ + return new Rect(point.x, point.y, itemSize.width, itemSize.height, i); + }); + return this.getTransformedPositions(itemsData, this.containerWidth); + } // If no transforms are going to happen, simply return an array of the + // future points of each item. - _dispatch(name, data = {}) { - if (this.isDestroyed) { - return; + return items.map(function (item) { + return _this5._getItemPosition(Shuffle.getSize(item.element, true)); + }); } + /** + * Determine the location of the next item, based on its size. + * @param {{width: number, height: number}} itemSize Object with width and height. + * @return {Point} + * @private + */ - data.shuffle = this; - this.emit(name, data); - } - /** - * Zeros out the y columns array, which is used to determine item placement. - * @private - */ - - - _resetCols() { - let i = this.cols; - this.positions = []; - - while (i) { - i -= 1; - this.positions.push(0); + }, { + key: "_getItemPosition", + value: function _getItemPosition(itemSize) { + return getItemPosition({ + itemSize: itemSize, + positions: this.positions, + gridSize: this.colWidth, + total: this.cols, + threshold: this.options.columnThreshold, + buffer: this.options.buffer + }); } - } - /** - * Loops through each item that should be shown and calculates the x, y position. - * @param {ShuffleItem[]} items Array of items that will be shown/layed - * out in order in their array. - */ - - - _layout(items) { - const itemPositions = this._getNextPositions(items); - - let count = 0; - items.forEach((item, i) => { - function callback() { - item.applyCss(ShuffleItem.Css.VISIBLE.after); - } // If the item will not change its position, do not add it to the render - // queue. Transitions don't fire when setting a property to the same value. - - - if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) { - item.applyCss(ShuffleItem.Css.VISIBLE.before); - callback(); - return; - } + /** + * Mutate positions before they're applied. + * @param {Rect[]} itemRects Item data objects. + * @param {number} containerWidth Width of the containing element. + * @return {Point[]} + * @protected + */ - item.point = itemPositions[i]; - item.scale = ShuffleItem.Scale.VISIBLE; - item.isHidden = false; // Clone the object so that the `before` object isn't modified when the - // transition delay is added. + }, { + key: "getTransformedPositions", + value: function getTransformedPositions(itemRects, containerWidth) { + return getCenteredPositions(itemRects, containerWidth); + } + /** + * Hides the elements that don't match our filter. + * @param {ShuffleItem[]} collection Collection to shrink. + * @private + */ - const styles = this.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before); - styles.transitionDelay = this._getStaggerAmount(count) + 'ms'; + }, { + key: "_shrink", + value: function _shrink() { + var _this6 = this; + + var collection = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._getConcealedItems(); + var count = 0; + collection.forEach(function (item) { + function callback() { + item.applyCss(ShuffleItem.Css.HIDDEN.after); + } // Continuing would add a transitionend event listener to the element, but + // that listener would not execute because the transform and opacity would + // stay the same. + // The callback is executed here because it is not guaranteed to be called + // after the transitionend event because the transitionend could be + // canceled if another animation starts. + + + if (item.isHidden) { + item.applyCss(ShuffleItem.Css.HIDDEN.before); + callback(); + return; + } - this._queue.push({ - item, - styles, - callback - }); - - count += 1; - }); - } - /** - * Return an array of Point instances representing the future positions of - * each item. - * @param {ShuffleItem[]} items Array of sorted shuffle items. - * @return {Point[]} - * @private - */ + item.scale = ShuffleItem.Scale.HIDDEN; + item.isHidden = true; + var styles = _this6.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before); - _getNextPositions(items) { - // If position data is going to be changed, add the item's size to the - // transformer to allow for calculations. - if (this.options.isCentered) { - const itemsData = items.map((item, i) => { - const itemSize = Shuffle.getSize(item.element, true); + styles.transitionDelay = _this6._getStaggerAmount(count) + 'ms'; - const point = this._getItemPosition(itemSize); + _this6._queue.push({ + item: item, + styles: styles, + callback: callback + }); - return new Rect(point.x, point.y, itemSize.width, itemSize.height, i); + count += 1; }); - return this.getTransformedPositions(itemsData, this.containerWidth); - } // If no transforms are going to happen, simply return an array of the - // future points of each item. - - - return items.map(item => this._getItemPosition(Shuffle.getSize(item.element, true))); - } - /** - * Determine the location of the next item, based on its size. - * @param {{width: number, height: number}} itemSize Object with width and height. - * @return {Point} - * @private - */ - - - _getItemPosition(itemSize) { - return getItemPosition({ - itemSize, - positions: this.positions, - gridSize: this.colWidth, - total: this.cols, - threshold: this.options.columnThreshold, - buffer: this.options.buffer - }); - } - /** - * Mutate positions before they're applied. - * @param {Rect[]} itemRects Item data objects. - * @param {number} containerWidth Width of the containing element. - * @return {Point[]} - * @protected - */ - - - getTransformedPositions(itemRects, containerWidth) { - return getCenteredPositions(itemRects, containerWidth); - } - /** - * Hides the elements that don't match our filter. - * @param {ShuffleItem[]} collection Collection to shrink. - * @private - */ - - - _shrink(collection = this._getConcealedItems()) { - let count = 0; - collection.forEach(item => { - function callback() { - item.applyCss(ShuffleItem.Css.HIDDEN.after); - } // Continuing would add a transitionend event listener to the element, but - // that listener would not execute because the transform and opacity would - // stay the same. - // The callback is executed here because it is not guaranteed to be called - // after the transitionend event because the transitionend could be - // canceled if another animation starts. - + } + /** + * Resize handler. + * @private + */ - if (item.isHidden) { - item.applyCss(ShuffleItem.Css.HIDDEN.before); - callback(); + }, { + key: "_handleResize", + value: function _handleResize() { + // If shuffle is disabled, destroyed, don't do anything + if (!this.isEnabled || this.isDestroyed) { return; } - item.scale = ShuffleItem.Scale.HIDDEN; - item.isHidden = true; - const styles = this.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before); - styles.transitionDelay = this._getStaggerAmount(count) + 'ms'; - - this._queue.push({ - item, - styles, - callback - }); - - count += 1; - }); - } - /** - * Resize handler. - * @private - */ - - - _handleResize() { - // If shuffle is disabled, destroyed, don't do anything - if (!this.isEnabled || this.isDestroyed) { - return; + this.update(); } + /** + * Returns styles which will be applied to the an item for a transition. + * @param {ShuffleItem} item Item to get styles for. Should have updated + * scale and point properties. + * @param {Object} styleObject Extra styles that will be used in the transition. + * @return {!Object} Transforms for transitions, left/top for animate. + * @protected + */ - this.update(); - } - /** - * Returns styles which will be applied to the an item for a transition. - * @param {ShuffleItem} item Item to get styles for. Should have updated - * scale and point properties. - * @param {Object} styleObject Extra styles that will be used in the transition. - * @return {!Object} Transforms for transitions, left/top for animate. - * @protected - */ - - - getStylesForTransition(item, styleObject) { - // Clone the object to avoid mutating the original. - // eslint-disable-next-line prefer-object-spread - const styles = Object.assign({}, styleObject); - - if (this.options.useTransforms) { - const sign = this.options.isRTL ? '-' : ''; - const x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x; - const y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y; - styles.transform = `translate(${sign}${x}px, ${y}px) scale(${item.scale})`; - } else { - if (this.options.isRTL) { - styles.right = item.point.x + 'px'; + }, { + key: "getStylesForTransition", + value: function getStylesForTransition(item, styleObject) { + // Clone the object to avoid mutating the original. + // eslint-disable-next-line prefer-object-spread + var styles = Object.assign({}, styleObject); + + if (this.options.useTransforms) { + var sign = this.options.isRTL ? '-' : ''; + var x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x; + var y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y; + styles.transform = "translate(".concat(sign).concat(x, "px, ").concat(y, "px) scale(").concat(item.scale, ")"); } else { - styles.left = item.point.x + 'px'; + if (this.options.isRTL) { + styles.right = item.point.x + 'px'; + } else { + styles.left = item.point.x + 'px'; + } + + styles.top = item.point.y + 'px'; } - styles.top = item.point.y + 'px'; + return styles; } + /** + * Listen for the transition end on an element and execute the itemCallback + * when it finishes. + * @param {Element} element Element to listen on. + * @param {function} itemCallback Callback for the item. + * @param {function} done Callback to notify `parallel` that this one is done. + */ - return styles; - } - /** - * Listen for the transition end on an element and execute the itemCallback - * when it finishes. - * @param {Element} element Element to listen on. - * @param {function} itemCallback Callback for the item. - * @param {function} done Callback to notify `parallel` that this one is done. - */ - - - _whenTransitionDone(element, itemCallback, done) { - const id = onTransitionEnd(element, evt => { - itemCallback(); - done(null, evt); - }); - - this._transitions.push(id); - } - /** - * Return a function which will set CSS styles and call the `done` function - * when (if) the transition finishes. - * @param {Object} opts Transition object. - * @return {function} A function to be called with a `done` function. - */ - - - _getTransitionFunction(opts) { - return done => { - opts.item.applyCss(opts.styles); - - this._whenTransitionDone(opts.item.element, opts.callback, done); - }; - } - /** - * Execute the styles gathered in the style queue. This applies styles to elements, - * triggering transitions. - * @private - */ - + }, { + key: "_whenTransitionDone", + value: function _whenTransitionDone(element, itemCallback, done) { + var id = onTransitionEnd(element, function (evt) { + itemCallback(); + done(null, evt); + }); - _processQueue() { - if (this.isTransitioning) { - this._cancelMovement(); + this._transitions.push(id); } + /** + * Return a function which will set CSS styles and call the `done` function + * when (if) the transition finishes. + * @param {Object} opts Transition object. + * @return {function} A function to be called with a `done` function. + */ - const hasSpeed = this.options.speed > 0; - const hasQueue = this._queue.length > 0; - - if (hasQueue && hasSpeed && this.isInitialized) { - this._startTransitions(this._queue); - } else if (hasQueue) { - this._styleImmediately(this._queue); - - this._dispatch(Shuffle.EventType.LAYOUT); // A call to layout happened, but none of the newly visible items will - // change position or the transition duration is zero, which will not trigger - // the transitionend event. - - } else { - this._dispatch(Shuffle.EventType.LAYOUT); - } // Remove everything in the style queue + }, { + key: "_getTransitionFunction", + value: function _getTransitionFunction(opts) { + var _this7 = this; + return function (done) { + opts.item.applyCss(opts.styles); - this._queue.length = 0; - } - /** - * Wait for each transition to finish, the emit the layout event. - * @param {Object[]} transitions Array of transition objects. - */ + _this7._whenTransitionDone(opts.item.element, opts.callback, done); + }; + } + /** + * Execute the styles gathered in the style queue. This applies styles to elements, + * triggering transitions. + * @private + */ + }, { + key: "_processQueue", + value: function _processQueue() { + if (this.isTransitioning) { + this._cancelMovement(); + } - _startTransitions(transitions) { - // Set flag that shuffle is currently in motion. - this.isTransitioning = true; // Create an array of functions to be called. + var hasSpeed = this.options.speed > 0; + var hasQueue = this._queue.length > 0; - const callbacks = transitions.map(obj => this._getTransitionFunction(obj)); - arrayParallel(callbacks, this._movementFinished.bind(this)); - } + if (hasQueue && hasSpeed && this.isInitialized) { + this._startTransitions(this._queue); + } else if (hasQueue) { + this._styleImmediately(this._queue); - _cancelMovement() { - // Remove the transition end event for each listener. - this._transitions.forEach(cancelTransitionEnd); // Reset the array. + this._dispatch(Shuffle.EventType.LAYOUT); // A call to layout happened, but none of the newly visible items will + // change position or the transition duration is zero, which will not trigger + // the transitionend event. + } else { + this._dispatch(Shuffle.EventType.LAYOUT); + } // Remove everything in the style queue - this._transitions.length = 0; // Show it's no longer active. - this.isTransitioning = false; - } - /** - * Apply styles without a transition. - * @param {Object[]} objects Array of transition objects. - * @private - */ + this._queue.length = 0; + } + /** + * Wait for each transition to finish, the emit the layout event. + * @param {Object[]} transitions Array of transition objects. + */ + }, { + key: "_startTransitions", + value: function _startTransitions(transitions) { + var _this8 = this; - _styleImmediately(objects) { - if (objects.length) { - const elements = objects.map(obj => obj.item.element); + // Set flag that shuffle is currently in motion. + this.isTransitioning = true; // Create an array of functions to be called. - Shuffle._skipTransitions(elements, () => { - objects.forEach(obj => { - obj.item.applyCss(obj.styles); - obj.callback(); - }); + var callbacks = transitions.map(function (obj) { + return _this8._getTransitionFunction(obj); }); + arrayParallel(callbacks, this._movementFinished.bind(this)); } - } + }, { + key: "_cancelMovement", + value: function _cancelMovement() { + // Remove the transition end event for each listener. + this._transitions.forEach(cancelTransitionEnd); // Reset the array. - _movementFinished() { - this._transitions.length = 0; - this.isTransitioning = false; - this._dispatch(Shuffle.EventType.LAYOUT); - } - /** - * The magic. This is what makes the plugin 'shuffle' - * @param {string|string[]|function(Element):boolean} [category] Category to filter by. - * Can be a function, string, or array of strings. - * @param {SortOptions} [sortOptions] A sort object which can sort the visible set - */ + this._transitions.length = 0; // Show it's no longer active. + this.isTransitioning = false; + } + /** + * Apply styles without a transition. + * @param {Object[]} objects Array of transition objects. + * @private + */ + + }, { + key: "_styleImmediately", + value: function _styleImmediately(objects) { + if (objects.length) { + var elements = objects.map(function (obj) { + return obj.item.element; + }); - filter(category, sortOptions) { - if (!this.isEnabled) { - return; + Shuffle._skipTransitions(elements, function () { + objects.forEach(function (obj) { + obj.item.applyCss(obj.styles); + obj.callback(); + }); + }); + } } + }, { + key: "_movementFinished", + value: function _movementFinished() { + this._transitions.length = 0; + this.isTransitioning = false; - if (!category || category && category.length === 0) { - category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign + this._dispatch(Shuffle.EventType.LAYOUT); } + /** + * The magic. This is what makes the plugin 'shuffle' + * @param {string|string[]|function(Element):boolean} [category] Category to filter by. + * Can be a function, string, or array of strings. + * @param {SortOptions} [sortOptions] A sort object which can sort the visible set + */ - this._filter(category); // Shrink each hidden item + }, { + key: "filter", + value: function filter(category, sortOptions) { + if (!this.isEnabled) { + return; + } + if (!category || category && category.length === 0) { + category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign + } - this._shrink(); // How many visible elements? + this._filter(category); // Shrink each hidden item - this._updateItemCount(); // Update transforms on visible elements so they will animate to their new positions. + this._shrink(); // How many visible elements? - this.sort(sortOptions); - } - /** - * Gets the visible elements, sorts them, and passes them to layout. - * @param {SortOptions} [sortOptions] The options object to pass to `sorter`. - */ + this._updateItemCount(); // Update transforms on visible elements so they will animate to their new positions. - sort(sortOptions = this.lastSort) { - if (!this.isEnabled) { - return; + this.sort(sortOptions); } + /** + * Gets the visible elements, sorts them, and passes them to layout. + * @param {SortOptions} [sortOptions] The options object to pass to `sorter`. + */ - this._resetCols(); - - const items = sorter(this._getFilteredItems(), sortOptions); - - this._layout(items); // `_layout` always happens after `_shrink`, so it's safe to process the style - // queue here with styles from the shrink method. + }, { + key: "sort", + value: function sort() { + var sortOptions = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.lastSort; + if (!this.isEnabled) { + return; + } - this._processQueue(); // Adjust the height of the container. + this._resetCols(); + var items = sorter(this._getFilteredItems(), sortOptions); - this._setContainerSize(); + this._layout(items); // `_layout` always happens after `_shrink`, so it's safe to process the style + // queue here with styles from the shrink method. - this.lastSort = sortOptions; - } - /** - * Reposition everything. - * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated. - */ + this._processQueue(); // Adjust the height of the container. - update(isOnlyLayout = false) { - if (this.isEnabled) { - if (!isOnlyLayout) { - // Get updated colCount - this._setColumns(); - } // Layout items + this._setContainerSize(); - this.sort(); + this.lastSort = sortOptions; } - } - /** - * Use this instead of `update()` if you don't need the columns and gutters updated - * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations - * could be off. - */ - - - layout() { - this.update(true); - } - /** - * New items have been appended to shuffle. Mix them in with the current - * filter or sort status. - * @param {Element[]} newItems Collection of new items. - */ + /** + * Reposition everything. + * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated. + */ + }, { + key: "update", + value: function update() { + var isOnlyLayout = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false; - add(newItems) { - const items = arrayUnique(newItems).map(el => new ShuffleItem(el, this.options.isRTL)); // Add classes and set initial positions. + if (this.isEnabled) { + if (!isOnlyLayout) { + // Get updated colCount + this._setColumns(); + } // Layout items - this._initItems(items); // Determine which items will go with the current filter. + this.sort(); + } + } + /** + * Use this instead of `update()` if you don't need the columns and gutters updated + * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations + * could be off. + */ - this._resetCols(); + }, { + key: "layout", + value: function layout() { + this.update(true); + } + /** + * New items have been appended to shuffle. Mix them in with the current + * filter or sort status. + * @param {Element[]} newItems Collection of new items. + */ - const allItems = this._mergeNewItems(items); + }, { + key: "add", + value: function add(newItems) { + var _this9 = this; - const sortedItems = sorter(allItems, this.lastSort); + var items = arrayUnique(newItems).map(function (el) { + return new ShuffleItem(el, _this9.options.isRTL); + }); // Add classes and set initial positions. - const allSortedItemsSet = this._filter(this.lastFilter, sortedItems); + this._initItems(items); // Determine which items will go with the current filter. - const isNewItem = item => items.includes(item); - const applyHiddenState = item => { - item.scale = ShuffleItem.Scale.HIDDEN; - item.isHidden = true; - item.applyCss(ShuffleItem.Css.HIDDEN.before); - item.applyCss(ShuffleItem.Css.HIDDEN.after); - }; // Layout all items again so that new items get positions. - // Synchonously apply positions. + this._resetCols(); + var allItems = this._mergeNewItems(items); - const itemPositions = this._getNextPositions(allSortedItemsSet.visible); + var sortedItems = sorter(allItems, this.lastSort); - allSortedItemsSet.visible.forEach((item, i) => { - if (isNewItem(item)) { - item.point = itemPositions[i]; - applyHiddenState(item); - item.applyCss(this.getStylesForTransition(item, {})); - } - }); - allSortedItemsSet.hidden.forEach(item => { - if (isNewItem(item)) { - applyHiddenState(item); - } - }); // Cause layout so that the styles above are applied. + var allSortedItemsSet = this._filter(this.lastFilter, sortedItems); - this.element.offsetWidth; // eslint-disable-line no-unused-expressions - // Add transition to each item. + var isNewItem = function isNewItem(item) { + return items.includes(item); + }; - this.setItemTransitions(items); // Update the list of items. + var applyHiddenState = function applyHiddenState(item) { + item.scale = ShuffleItem.Scale.HIDDEN; + item.isHidden = true; + item.applyCss(ShuffleItem.Css.HIDDEN.before); + item.applyCss(ShuffleItem.Css.HIDDEN.after); + }; // Layout all items again so that new items get positions. + // Synchonously apply positions. - this.items = this._mergeNewItems(items); // Update layout/visibility of new and old items. - this.filter(this.lastFilter); - } - /** - * Disables shuffle from updating dimensions and layout on resize - */ + var itemPositions = this._getNextPositions(allSortedItemsSet.visible); + allSortedItemsSet.visible.forEach(function (item, i) { + if (isNewItem(item)) { + item.point = itemPositions[i]; + applyHiddenState(item); + item.applyCss(_this9.getStylesForTransition(item, {})); + } + }); + allSortedItemsSet.hidden.forEach(function (item) { + if (isNewItem(item)) { + applyHiddenState(item); + } + }); // Cause layout so that the styles above are applied. - disable() { - this.isEnabled = false; - } - /** - * Enables shuffle again - * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters - */ + this.element.offsetWidth; // eslint-disable-line no-unused-expressions + // Add transition to each item. + this.setItemTransitions(items); // Update the list of items. - enable(isUpdateLayout = true) { - this.isEnabled = true; + this.items = this._mergeNewItems(items); // Update layout/visibility of new and old items. - if (isUpdateLayout) { - this.update(); + this.filter(this.lastFilter); } - } - /** - * Remove 1 or more shuffle items. - * @param {Element[]} elements An array containing one or more - * elements in shuffle - * @return {Shuffle} The shuffle instance. - */ - + /** + * Disables shuffle from updating dimensions and layout on resize + */ - remove(elements) { - if (!elements.length) { - return; + }, { + key: "disable", + value: function disable() { + this.isEnabled = false; } + /** + * Enables shuffle again + * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters + */ - const collection = arrayUnique(elements); - const oldItems = collection.map(element => this.getItemByElement(element)).filter(item => !!item); + }, { + key: "enable", + value: function enable() { + var isUpdateLayout = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : true; + this.isEnabled = true; - const handleLayout = () => { - this._disposeItems(oldItems); // Remove the collection in the callback + if (isUpdateLayout) { + this.update(); + } + } + /** + * Remove 1 or more shuffle items. + * @param {Element[]} elements An array containing one or more + * elements in shuffle + * @return {Shuffle} The shuffle instance. + */ + }, { + key: "remove", + value: function remove(elements) { + var _this10 = this; - collection.forEach(element => { - element.parentNode.removeChild(element); - }); + if (!elements.length) { + return; + } - this._dispatch(Shuffle.EventType.REMOVED, { - collection + var collection = arrayUnique(elements); + var oldItems = collection.map(function (element) { + return _this10.getItemByElement(element); + }).filter(function (item) { + return !!item; }); - }; // Hide collection first. + var handleLayout = function handleLayout() { + _this10._disposeItems(oldItems); // Remove the collection in the callback - this._toggleFilterClasses({ - visible: [], - hidden: oldItems - }); - this._shrink(oldItems); + collection.forEach(function (element) { + element.parentNode.removeChild(element); + }); - this.sort(); // Update the list of items here because `remove` could be called again - // with an item that is in the process of being removed. + _this10._dispatch(Shuffle.EventType.REMOVED, { + collection: collection + }); + }; // Hide collection first. - this.items = this.items.filter(item => !oldItems.includes(item)); - this._updateItemCount(); + this._toggleFilterClasses({ + visible: [], + hidden: oldItems + }); - this.once(Shuffle.EventType.LAYOUT, handleLayout); - } - /** - * Retrieve a shuffle item by its element. - * @param {Element} element Element to look for. - * @return {?ShuffleItem} A shuffle item or undefined if it's not found. - */ + this._shrink(oldItems); + this.sort(); // Update the list of items here because `remove` could be called again + // with an item that is in the process of being removed. - getItemByElement(element) { - return this.items.find(item => item.element === element); - } - /** - * Dump the elements currently stored and reinitialize all child elements which - * match the `itemSelector`. - */ + this.items = this.items.filter(function (item) { + return !oldItems.includes(item); + }); + this._updateItemCount(); - resetItems() { - // Remove refs to current items. - this._disposeItems(this.items); + this.once(Shuffle.EventType.LAYOUT, handleLayout); + } + /** + * Retrieve a shuffle item by its element. + * @param {Element} element Element to look for. + * @return {?ShuffleItem} A shuffle item or undefined if it's not found. + */ - this.isInitialized = false; // Find new items in the DOM. + }, { + key: "getItemByElement", + value: function getItemByElement(element) { + return this.items.find(function (item) { + return item.element === element; + }); + } + /** + * Dump the elements currently stored and reinitialize all child elements which + * match the `itemSelector`. + */ - this.items = this._getItems(); // Set initial styles on the new items. + }, { + key: "resetItems", + value: function resetItems() { + var _this11 = this; - this._initItems(this.items); + // Remove refs to current items. + this._disposeItems(this.items); - this.once(Shuffle.EventType.LAYOUT, () => { - // Add transition to each item. - this.setItemTransitions(this.items); - this.isInitialized = true; - }); // Lay out all items. + this.isInitialized = false; // Find new items in the DOM. - this.filter(this.lastFilter); - } - /** - * Destroys shuffle, removes events, styles, and classes - */ + this.items = this._getItems(); // Set initial styles on the new items. + this._initItems(this.items); - destroy() { - this._cancelMovement(); + this.once(Shuffle.EventType.LAYOUT, function () { + // Add transition to each item. + _this11.setItemTransitions(_this11.items); - window.removeEventListener('resize', this._onResize); // Reset container styles + _this11.isInitialized = true; + }); // Lay out all items. - this.element.classList.remove('shuffle'); - this.element.removeAttribute('style'); // Reset individual item styles + this.filter(this.lastFilter); + } + /** + * Destroys shuffle, removes events, styles, and classes + */ - this._disposeItems(this.items); + }, { + key: "destroy", + value: function destroy() { + this._cancelMovement(); - this.items.length = 0; - this._transitions.length = 0; // Null DOM references + window.removeEventListener('resize', this._onResize); // Reset container styles - this.options.sizer = null; - this.element = null; // Set a flag so if a debounced resize has been triggered, - // it can first check if it is actually isDestroyed and not doing anything + this.element.classList.remove('shuffle'); + this.element.removeAttribute('style'); // Reset individual item styles - this.isDestroyed = true; - this.isEnabled = false; - } - /** - * Returns the outer width of an element, optionally including its margins. - * - * There are a few different methods for getting the width of an element, none of - * which work perfectly for all Shuffle's use cases. - * - * 1. getBoundingClientRect() `left` and `right` properties. - * - Accounts for transform scaled elements, making it useless for Shuffle - * elements which have shrunk. - * 2. The `offsetWidth` property. - * - This value stays the same regardless of the elements transform property, - * however, it does not return subpixel values. - * 3. getComputedStyle() - * - This works great Chrome, Firefox, Safari, but IE<=11 does not include - * padding and border when box-sizing: border-box is set, requiring a feature - * test and extra work to add the padding back for IE and other browsers which - * follow the W3C spec here. - * - * @param {Element} element The element. - * @param {boolean} [includeMargins=false] Whether to include margins. - * @return {{width: number, height: number}} The width and height. - */ + this._disposeItems(this.items); + this.items.length = 0; + this._transitions.length = 0; // Null DOM references - static getSize(element, includeMargins = false) { - // Store the styles so that they can be used by others without asking for it again. - const styles = window.getComputedStyle(element, null); - let width = getNumberStyle(element, 'width', styles); - let height = getNumberStyle(element, 'height', styles); + this.options.sizer = null; + this.element = null; // Set a flag so if a debounced resize has been triggered, + // it can first check if it is actually isDestroyed and not doing anything - if (includeMargins) { - const marginLeft = getNumberStyle(element, 'marginLeft', styles); - const marginRight = getNumberStyle(element, 'marginRight', styles); - const marginTop = getNumberStyle(element, 'marginTop', styles); - const marginBottom = getNumberStyle(element, 'marginBottom', styles); - width += marginLeft + marginRight; - height += marginTop + marginBottom; + this.isDestroyed = true; + this.isEnabled = false; } + /** + * Returns the outer width of an element, optionally including its margins. + * + * There are a few different methods for getting the width of an element, none of + * which work perfectly for all Shuffle's use cases. + * + * 1. getBoundingClientRect() `left` and `right` properties. + * - Accounts for transform scaled elements, making it useless for Shuffle + * elements which have shrunk. + * 2. The `offsetWidth` property. + * - This value stays the same regardless of the elements transform property, + * however, it does not return subpixel values. + * 3. getComputedStyle() + * - This works great Chrome, Firefox, Safari, but IE<=11 does not include + * padding and border when box-sizing: border-box is set, requiring a feature + * test and extra work to add the padding back for IE and other browsers which + * follow the W3C spec here. + * + * @param {Element} element The element. + * @param {boolean} [includeMargins=false] Whether to include margins. + * @return {{width: number, height: number}} The width and height. + */ - return { - width, - height - }; - } - /** - * Change a property or execute a function which will not have a transition - * @param {Element[]} elements DOM elements that won't be transitioned. - * @param {function} callback A function which will be called while transition - * is set to 0ms. - * @private - */ - - - static _skipTransitions(elements, callback) { - const zero = '0ms'; // Save current duration and delay. - - const data = elements.map(element => { - const { - style - } = element; - const duration = style.transitionDuration; - const delay = style.transitionDelay; // Set the duration to zero so it happens immediately + }], [{ + key: "getSize", + value: function getSize(element) { + var includeMargins = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false; + // Store the styles so that they can be used by others without asking for it again. + var styles = window.getComputedStyle(element, null); + var width = getNumberStyle(element, 'width', styles); + var height = getNumberStyle(element, 'height', styles); + + if (includeMargins) { + var marginLeft = getNumberStyle(element, 'marginLeft', styles); + var marginRight = getNumberStyle(element, 'marginRight', styles); + var marginTop = getNumberStyle(element, 'marginTop', styles); + var marginBottom = getNumberStyle(element, 'marginBottom', styles); + width += marginLeft + marginRight; + height += marginTop + marginBottom; + } - style.transitionDuration = zero; - style.transitionDelay = zero; return { - duration, - delay + width: width, + height: height }; - }); - callback(); // Cause forced synchronous layout. + } + /** + * Change a property or execute a function which will not have a transition + * @param {Element[]} elements DOM elements that won't be transitioned. + * @param {function} callback A function which will be called while transition + * is set to 0ms. + * @private + */ - elements[0].offsetWidth; // eslint-disable-line no-unused-expressions - // Put the duration back + }, { + key: "_skipTransitions", + value: function _skipTransitions(elements, callback) { + var zero = '0ms'; // Save current duration and delay. + + var data = elements.map(function (element) { + var style = element.style; + var duration = style.transitionDuration; + var delay = style.transitionDelay; // Set the duration to zero so it happens immediately + + style.transitionDuration = zero; + style.transitionDelay = zero; + return { + duration: duration, + delay: delay + }; + }); + callback(); // Cause forced synchronous layout. - elements.forEach((element, i) => { - element.style.transitionDuration = data[i].duration; - element.style.transitionDelay = data[i].delay; - }); - } + elements[0].offsetWidth; // eslint-disable-line no-unused-expressions + // Put the duration back - } + elements.forEach(function (element, i) { + element.style.transitionDuration = data[i].duration; + element.style.transitionDelay = data[i].delay; + }); + } + }]); + + return Shuffle; + }(tinyEmitter); Shuffle.ShuffleItem = ShuffleItem; Shuffle.ALL_ITEMS = 'all'; diff --git a/dist/shuffle.js.map b/dist/shuffle.js.map index 60dc739..1ded37c 100644 --- a/dist/shuffle.js.map +++ b/dist/shuffle.js.map @@ -1 +1 @@ -{"version":3,"file":"shuffle.js","sources":["../node_modules/tiny-emitter/index.js","../node_modules/matches-selector/index.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/point.js","../src/rect.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/array-min.js","../src/layout.js","../src/hyphenate.js","../src/shuffle.js"],"sourcesContent":["function E () {\n // Keep this empty so it's easier to inherit from\n // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)\n}\n\nE.prototype = {\n on: function (name, callback, ctx) {\n var e = this.e || (this.e = {});\n\n (e[name] || (e[name] = [])).push({\n fn: callback,\n ctx: ctx\n });\n\n return this;\n },\n\n once: function (name, callback, ctx) {\n var self = this;\n function listener () {\n self.off(name, listener);\n callback.apply(ctx, arguments);\n };\n\n listener._ = callback\n return this.on(name, listener, ctx);\n },\n\n emit: function (name) {\n var data = [].slice.call(arguments, 1);\n var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n var i = 0;\n var len = evtArr.length;\n\n for (i; i < len; i++) {\n evtArr[i].fn.apply(evtArr[i].ctx, data);\n }\n\n return this;\n },\n\n off: function (name, callback) {\n var e = this.e || (this.e = {});\n var evts = e[name];\n var liveEvents = [];\n\n if (evts && callback) {\n for (var i = 0, len = evts.length; i < len; i++) {\n if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n liveEvents.push(evts[i]);\n }\n }\n\n // Remove event from queue to prevent memory leak\n // Suggested by https://github.com/lazd\n // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n (liveEvents.length)\n ? e[name] = liveEvents\n : delete e[name];\n\n return this;\n }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n","'use strict';\n\nvar proto = typeof Element !== 'undefined' ? Element.prototype : {};\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (!el || el.nodeType !== 1) return false;\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\n\nclass Point {\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default class Rect {\n /**\n * Class for representing rectangular regions.\n * https://github.com/google/closure-library/blob/master/closure/goog/math/rect.js\n * @param {number} x Left.\n * @param {number} y Top.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} id Identifier\n * @constructor\n */\n constructor(x, y, w, h, id) {\n this.id = id;\n\n /** @type {number} */\n this.left = x;\n\n /** @type {number} */\n this.top = y;\n\n /** @type {number} */\n this.width = w;\n\n /** @type {number} */\n this.height = h;\n }\n\n /**\n * Returns whether two rectangles intersect.\n * @param {Rect} a A Rectangle.\n * @param {Rect} b A Rectangle.\n * @return {boolean} Whether a and b intersect.\n */\n static intersects(a, b) {\n return (\n a.left < b.left + b.width && b.left < a.left + a.width\n && a.top < b.top + b.height && b.top < a.top + a.height);\n }\n}\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element, isRTL) {\n id += 1;\n this.id = id;\n this.element = element;\n\n /**\n * Set correct direction of item\n */\n this.isRTL = isRTL;\n\n /**\n * Used to separate items for layout and shrink.\n */\n this.isVisible = true;\n\n /**\n * Used to determine if a transition will happen. By the time the _layout\n * and _shrink methods get the ShuffleItem instances, the `isVisible` value\n * has already been changed by the separation methods, so this property is\n * needed to know if the item was visible/hidden before the shrink/layout.\n */\n this.isHidden = false;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n this.element.removeAttribute('aria-hidden');\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n this.element.setAttribute('aria-hidden', true);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.applyCss(this.isRTL ? ShuffleItem.Css.DIRECTION.rtl : ShuffleItem.Css.DIRECTION.ltr);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n visibility: 'visible',\n willChange: 'transform',\n },\n DIRECTION: {\n ltr: {\n left: 0,\n },\n rtl: {\n right: 0,\n },\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {\n transitionDelay: '',\n },\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n transitionDelay: '',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","let value = null;\nexport default () => {\n if (value !== null) {\n return value;\n }\n\n const element = document.body || document.documentElement;\n const e = document.createElement('div');\n e.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;';\n element.appendChild(e);\n\n value = window.getComputedStyle(e, null).width === '10px';\n\n element.removeChild(e);\n\n return value;\n};\n","import getNumber from './get-number';\nimport testComputedSize from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(\n element, style,\n styles = window.getComputedStyle(element, null),\n) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!testComputedSize() && style === 'width') {\n value += getNumber(styles.paddingLeft)\n + getNumber(styles.paddingRight)\n + getNumber(styles.borderLeftWidth)\n + getNumber(styles.borderRightWidth);\n } else if (!testComputedSize() && style === 'height') {\n value += getNumber(styles.paddingTop)\n + getNumber(styles.paddingBottom)\n + getNumber(styles.borderTopWidth)\n + getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // Custom sort function\n compare: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n/**\n * You can return `undefined` from the `by` function to revert to DOM order.\n * @param {Array} arr Array to sort.\n * @param {SortOptions} options Sorting options.\n * @return {Array}\n */\nexport default function sorter(arr, options) {\n // eslint-disable-next-line prefer-object-spread\n const opts = Object.assign({}, defaults, options);\n const original = Array.from(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n } else if (typeof opts.compare === 'function') {\n arr.sort(opts.compare);\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport Rect from './rect';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 10]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 10]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({\n itemSize, positions, gridSize, total, threshold, buffer,\n}) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]);\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n\n/**\n * This method attempts to center items. This method could potentially be slow\n * with a large number of items because it must place items, then check every\n * previous item to ensure there is no overlap.\n * @param {Array.} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Array.}\n */\nexport function getCenteredPositions(itemRects, containerWidth) {\n const rowMap = {};\n\n // Populate rows by their offset because items could jump between rows like:\n // a c\n // bbb\n itemRects.forEach((itemRect) => {\n if (rowMap[itemRect.top]) {\n // Push the point to the last row array.\n rowMap[itemRect.top].push(itemRect);\n } else {\n // Start of a new row.\n rowMap[itemRect.top] = [itemRect];\n }\n });\n\n // For each row, find the end of the last item, then calculate\n // the remaining space by dividing it by 2. Then add that\n // offset to the x position of each point.\n let rects = [];\n const rows = [];\n const centeredRows = [];\n Object.keys(rowMap).forEach((key) => {\n const itemRects = rowMap[key];\n rows.push(itemRects);\n const lastItem = itemRects[itemRects.length - 1];\n const end = lastItem.left + lastItem.width;\n const offset = Math.round((containerWidth - end) / 2);\n\n let finalRects = itemRects;\n let canMove = false;\n if (offset > 0) {\n const newRects = [];\n canMove = itemRects.every((r) => {\n const newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id);\n\n // Check all current rects to make sure none overlap.\n const noOverlap = !rects.some((r) => Rect.intersects(newRect, r));\n\n newRects.push(newRect);\n return noOverlap;\n });\n\n // If none of the rectangles overlapped, the whole group can be centered.\n if (canMove) {\n finalRects = newRects;\n }\n }\n\n // If the items are not going to be offset, ensure that the original\n // placement for this row will not overlap previous rows (row-spanning\n // elements could be in the way).\n if (!canMove) {\n let intersectingRect;\n const hasOverlap = itemRects.some((itemRect) => rects.some((r) => {\n const intersects = Rect.intersects(itemRect, r);\n if (intersects) {\n intersectingRect = r;\n }\n return intersects;\n }));\n\n // If there is any overlap, replace the overlapping row with the original.\n if (hasOverlap) {\n const rowIndex = centeredRows.findIndex((items) => items.includes(intersectingRect));\n centeredRows.splice(rowIndex, 1, rows[rowIndex]);\n }\n }\n\n rects = rects.concat(finalRects);\n centeredRows.push(finalRects);\n });\n\n // Reduce array of arrays to a single array of points.\n // https://stackoverflow.com/a/10865042/373422\n // Then reset sort back to how the items were passed to this method.\n // Remove the wrapper object with index, map to a Point.\n return [].concat.apply([], centeredRows) // eslint-disable-line prefer-spread\n .sort((a, b) => (a.id - b.id))\n .map((itemRect) => new Point(itemRect.left, itemRect.top));\n}\n","/**\n * Hyphenates a javascript style string to a css one. For example:\n * MozBoxSizing -> -moz-box-sizing.\n * @param {string} str The string to hyphenate.\n * @return {string} The hyphenated string.\n */\nexport default function hyphenate(str) {\n return str.replace(/([A-Z])/g, (str, m1) => `-${m1.toLowerCase()}`);\n}\n","import TinyEmitter from 'tiny-emitter';\nimport matches from 'matches-selector';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\n\nimport Point from './point';\nimport Rect from './rect';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport {\n getItemPosition,\n getColumnSpan,\n getAvailablePositions,\n getShortColumn,\n getCenteredPositions,\n} from './layout';\nimport arrayMax from './array-max';\nimport hyphenate from './hyphenate';\n\nfunction arrayUnique(x) {\n return Array.from(new Set(x));\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle extends TinyEmitter {\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n super();\n // eslint-disable-next-line prefer-object-spread\n this.options = Object.assign({}, Shuffle.options, options);\n\n // Allow misspelling of delimiter since that's how it used to be.\n // Remove in v6.\n if (this.options.delimeter) {\n this.options.delimiter = this.options.delimeter;\n }\n\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems(this.items);\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // If the page has not already emitted the `load` event, call layout on load.\n // This avoids layout issues caused by images and fonts loading after the\n // instance has been initialized.\n if (document.readyState !== 'complete') {\n const layout = this.layout.bind(this);\n window.addEventListener('load', function onLoad() {\n window.removeEventListener('load', onLoad);\n layout();\n });\n }\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this.setItemTransitions(this.items);\n this.element.style.transition = `height ${this.options.speed}ms ${this.options.easing}`;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle\n ? this.options.throttle(resizeFunction, this.options.throttleTime)\n : resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n }\n\n // Check for an element\n if (option && option.nodeType && option.nodeType === 1) {\n return option;\n }\n\n // Check for jQuery object\n if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string|string[]|function(Element):boolean} [category] Category to\n * filter by. If it's given, the last category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|string[]|function(Element):boolean} category Category or function to filter by.\n * @param {ShuffleItem[]} items A collection of items to filter.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|string[]|function():boolean} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimiter\n ? attr.split(this.options.delimiter)\n : JSON.parse(attr);\n\n function testCategory(category) {\n return keys.includes(category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return keys.includes(category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {ShuffleItem[]} items Set to initialize.\n * @private\n */\n _initItems(items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @param {ShuffleItem[]} items Set to dispose.\n * @private\n */\n _disposeItems(items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of a new Shuffle instance.\n * @param {ShuffleItem[]} items Shuffle items to set transitions on.\n * @protected\n */\n setItemTransitions(items) {\n const { speed, easing } = this.options;\n const positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left'];\n\n // Allow users to transtion other properties if they exist in the `before`\n // css mapping of the shuffle item.\n const cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map((k) => hyphenate(k));\n const properties = positionProps.concat(cssProps).join();\n\n items.forEach((item) => {\n item.element.style.transitionDuration = speed + 'ms';\n item.element.style.transitionTimingFunction = easing;\n item.element.style.transitionProperty = properties;\n });\n }\n\n _getItems() {\n return Array.from(this.element.children)\n .filter((el) => matches(el, this.options.itemSelector))\n .map((el) => new ShuffleItem(el, this.options.isRTL));\n }\n\n /**\n * Combine the current items array with a new one and sort it by DOM order.\n * @param {ShuffleItem[]} items Items to track.\n * @return {ShuffleItem[]}\n */\n _mergeNewItems(items) {\n const children = Array.from(this.element.children);\n return sorter(this.items.concat(items), {\n by(element) {\n return children.indexOf(element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter((item) => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter((item) => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.options.sizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.options.sizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns)\n < this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns || 0), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * Emit an event from this instance.\n * @param {string} name Event name.\n * @param {Object} [data={}] Optional object data.\n */\n _dispatch(name, data = {}) {\n if (this.isDestroyed) {\n return;\n }\n\n data.shuffle = this;\n this.emit(name, data);\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {ShuffleItem[]} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n const itemPositions = this._getNextPositions(items);\n\n let count = 0;\n items.forEach((item, i) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = itemPositions[i];\n item.scale = ShuffleItem.Scale.VISIBLE;\n item.isHidden = false;\n\n // Clone the object so that the `before` object isn't modified when the\n // transition delay is added.\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Return an array of Point instances representing the future positions of\n * each item.\n * @param {ShuffleItem[]} items Array of sorted shuffle items.\n * @return {Point[]}\n * @private\n */\n _getNextPositions(items) {\n // If position data is going to be changed, add the item's size to the\n // transformer to allow for calculations.\n if (this.options.isCentered) {\n const itemsData = items.map((item, i) => {\n const itemSize = Shuffle.getSize(item.element, true);\n const point = this._getItemPosition(itemSize);\n return new Rect(point.x, point.y, itemSize.width, itemSize.height, i);\n });\n\n return this.getTransformedPositions(itemsData, this.containerWidth);\n }\n\n // If no transforms are going to happen, simply return an array of the\n // future points of each item.\n return items.map((item) => this._getItemPosition(Shuffle.getSize(item.element, true)));\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Mutate positions before they're applied.\n * @param {Rect[]} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Point[]}\n * @protected\n */\n getTransformedPositions(itemRects, containerWidth) {\n return getCenteredPositions(itemRects, containerWidth);\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {ShuffleItem[]} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.isHidden) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {ShuffleItem} item Item to get styles for. Should have updated\n * scale and point properties.\n * @param {Object} styleObject Extra styles that will be used in the transition.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @protected\n */\n getStylesForTransition(item, styleObject) {\n // Clone the object to avoid mutating the original.\n // eslint-disable-next-line prefer-object-spread\n const styles = Object.assign({}, styleObject);\n\n if (this.options.useTransforms) {\n const sign = this.options.isRTL ? '-' : '';\n const x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x;\n const y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y;\n styles.transform = `translate(${sign}${x}px, ${y}px) scale(${item.scale})`;\n } else {\n if (this.options.isRTL) {\n styles.right = item.point.x + 'px';\n } else {\n styles.left = item.point.x + 'px';\n }\n styles.top = item.point.y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {function} itemCallback Callback for the item.\n * @param {function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(opts.styles);\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatch(Shuffle.EventType.LAYOUT);\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Object[]} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map((obj) => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Object[]} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map((obj) => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(obj.styles);\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|string[]|function(Element):boolean} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {SortOptions} [sortOptions] A sort object which can sort the visible set\n */\n filter(category, sortOptions) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortOptions);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {SortOptions} [sortOptions] The options object to pass to `sorter`.\n */\n sort(sortOptions = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n const items = sorter(this._getFilteredItems(), sortOptions);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = sortOptions;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated.\n */\n update(isOnlyLayout = false) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Element[]} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map((el) => new ShuffleItem(el, this.options.isRTL));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Determine which items will go with the current filter.\n this._resetCols();\n\n const allItems = this._mergeNewItems(items);\n const sortedItems = sorter(allItems, this.lastSort);\n const allSortedItemsSet = this._filter(this.lastFilter, sortedItems);\n\n const isNewItem = (item) => items.includes(item);\n const applyHiddenState = (item) => {\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n };\n\n // Layout all items again so that new items get positions.\n // Synchonously apply positions.\n const itemPositions = this._getNextPositions(allSortedItemsSet.visible);\n allSortedItemsSet.visible.forEach((item, i) => {\n if (isNewItem(item)) {\n item.point = itemPositions[i];\n applyHiddenState(item);\n item.applyCss(this.getStylesForTransition(item, {}));\n }\n });\n\n allSortedItemsSet.hidden.forEach((item) => {\n if (isNewItem(item)) {\n applyHiddenState(item);\n }\n });\n\n // Cause layout so that the styles above are applied.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Add transition to each item.\n this.setItemTransitions(items);\n\n // Update the list of items.\n this.items = this._mergeNewItems(items);\n\n // Update layout/visibility of new and old items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout = true) {\n this.isEnabled = true;\n if (isUpdateLayout) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items.\n * @param {Element[]} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle instance.\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map((element) => this.getItemByElement(element))\n .filter((item) => !!item);\n\n const handleLayout = () => {\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter((item) => !oldItems.includes(item));\n this._updateItemCount();\n\n this.once(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or undefined if it's not found.\n */\n getItemByElement(element) {\n return this.items.find((item) => item.element === element);\n }\n\n /**\n * Dump the elements currently stored and reinitialize all child elements which\n * match the `itemSelector`.\n */\n resetItems() {\n // Remove refs to current items.\n this._disposeItems(this.items);\n this.isInitialized = false;\n\n // Find new items in the DOM.\n this.items = this._getItems();\n\n // Set initial styles on the new items.\n this._initItems(this.items);\n\n this.once(Shuffle.EventType.LAYOUT, () => {\n // Add transition to each item.\n this.setItemTransitions(this.items);\n this.isInitialized = true;\n });\n\n // Lay out all items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems(this.items);\n\n this.items.length = 0;\n this._transitions.length = 0;\n\n // Null DOM references\n this.options.sizer = null;\n this.element = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n this.isEnabled = false;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. 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\ No newline at end of file +{"version":3,"file":"shuffle.js","sources":["../node_modules/tiny-emitter/index.js","../node_modules/matches-selector/index.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/point.js","../src/rect.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/array-min.js","../src/layout.js","../src/hyphenate.js","../src/shuffle.js"],"sourcesContent":["function E () {\n // Keep this empty so it's easier to inherit from\n // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)\n}\n\nE.prototype = {\n on: function (name, callback, ctx) {\n var e = this.e || (this.e = {});\n\n (e[name] || (e[name] = [])).push({\n fn: callback,\n ctx: ctx\n });\n\n return this;\n },\n\n once: function (name, callback, ctx) {\n var self = this;\n function listener () {\n self.off(name, listener);\n callback.apply(ctx, arguments);\n };\n\n listener._ = callback\n return this.on(name, listener, ctx);\n },\n\n emit: function (name) {\n var data = [].slice.call(arguments, 1);\n var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n var i = 0;\n var len = evtArr.length;\n\n for (i; i < len; i++) {\n evtArr[i].fn.apply(evtArr[i].ctx, data);\n }\n\n return this;\n },\n\n off: function (name, callback) {\n var e = this.e || (this.e = {});\n var evts = e[name];\n var liveEvents = [];\n\n if (evts && callback) {\n for (var i = 0, len = evts.length; i < len; i++) {\n if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n liveEvents.push(evts[i]);\n }\n }\n\n // Remove event from queue to prevent memory leak\n // Suggested by https://github.com/lazd\n // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n (liveEvents.length)\n ? e[name] = liveEvents\n : delete e[name];\n\n return this;\n }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n","'use strict';\n\nvar proto = typeof Element !== 'undefined' ? Element.prototype : {};\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (!el || el.nodeType !== 1) return false;\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\n\nclass Point {\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default class Rect {\n /**\n * Class for representing rectangular regions.\n * https://github.com/google/closure-library/blob/master/closure/goog/math/rect.js\n * @param {number} x Left.\n * @param {number} y Top.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} id Identifier\n * @constructor\n */\n constructor(x, y, w, h, id) {\n this.id = id;\n\n /** @type {number} */\n this.left = x;\n\n /** @type {number} */\n this.top = y;\n\n /** @type {number} */\n this.width = w;\n\n /** @type {number} */\n this.height = h;\n }\n\n /**\n * Returns whether two rectangles intersect.\n * @param {Rect} a A Rectangle.\n * @param {Rect} b A Rectangle.\n * @return {boolean} Whether a and b intersect.\n */\n static intersects(a, b) {\n return (\n a.left < b.left + b.width && b.left < a.left + a.width\n && a.top < b.top + b.height && b.top < a.top + a.height);\n }\n}\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element, isRTL) {\n id += 1;\n this.id = id;\n this.element = element;\n\n /**\n * Set correct direction of item\n */\n this.isRTL = isRTL;\n\n /**\n * Used to separate items for layout and shrink.\n */\n this.isVisible = true;\n\n /**\n * Used to determine if a transition will happen. By the time the _layout\n * and _shrink methods get the ShuffleItem instances, the `isVisible` value\n * has already been changed by the separation methods, so this property is\n * needed to know if the item was visible/hidden before the shrink/layout.\n */\n this.isHidden = false;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n this.element.removeAttribute('aria-hidden');\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n this.element.setAttribute('aria-hidden', true);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.applyCss(this.isRTL ? ShuffleItem.Css.DIRECTION.rtl : ShuffleItem.Css.DIRECTION.ltr);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n visibility: 'visible',\n willChange: 'transform',\n },\n DIRECTION: {\n ltr: {\n left: 0,\n },\n rtl: {\n right: 0,\n },\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {\n transitionDelay: '',\n },\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n transitionDelay: '',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","let value = null;\nexport default () => {\n if (value !== null) {\n return value;\n }\n\n const element = document.body || document.documentElement;\n const e = document.createElement('div');\n e.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;';\n element.appendChild(e);\n\n value = window.getComputedStyle(e, null).width === '10px';\n\n element.removeChild(e);\n\n return value;\n};\n","import getNumber from './get-number';\nimport testComputedSize from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(\n element, style,\n styles = window.getComputedStyle(element, null),\n) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!testComputedSize() && style === 'width') {\n value += getNumber(styles.paddingLeft)\n + getNumber(styles.paddingRight)\n + getNumber(styles.borderLeftWidth)\n + getNumber(styles.borderRightWidth);\n } else if (!testComputedSize() && style === 'height') {\n value += getNumber(styles.paddingTop)\n + getNumber(styles.paddingBottom)\n + getNumber(styles.borderTopWidth)\n + getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // Custom sort function\n compare: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n/**\n * You can return `undefined` from the `by` function to revert to DOM order.\n * @param {Array} arr Array to sort.\n * @param {SortOptions} options Sorting options.\n * @return {Array}\n */\nexport default function sorter(arr, options) {\n // eslint-disable-next-line prefer-object-spread\n const opts = Object.assign({}, defaults, options);\n const original = Array.from(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n } else if (typeof opts.compare === 'function') {\n arr.sort(opts.compare);\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport Rect from './rect';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 10]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 10]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({\n itemSize, positions, gridSize, total, threshold, buffer,\n}) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]);\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n\n/**\n * This method attempts to center items. This method could potentially be slow\n * with a large number of items because it must place items, then check every\n * previous item to ensure there is no overlap.\n * @param {Array.} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Array.}\n */\nexport function getCenteredPositions(itemRects, containerWidth) {\n const rowMap = {};\n\n // Populate rows by their offset because items could jump between rows like:\n // a c\n // bbb\n itemRects.forEach((itemRect) => {\n if (rowMap[itemRect.top]) {\n // Push the point to the last row array.\n rowMap[itemRect.top].push(itemRect);\n } else {\n // Start of a new row.\n rowMap[itemRect.top] = [itemRect];\n }\n });\n\n // For each row, find the end of the last item, then calculate\n // the remaining space by dividing it by 2. Then add that\n // offset to the x position of each point.\n let rects = [];\n const rows = [];\n const centeredRows = [];\n Object.keys(rowMap).forEach((key) => {\n const itemRects = rowMap[key];\n rows.push(itemRects);\n const lastItem = itemRects[itemRects.length - 1];\n const end = lastItem.left + lastItem.width;\n const offset = Math.round((containerWidth - end) / 2);\n\n let finalRects = itemRects;\n let canMove = false;\n if (offset > 0) {\n const newRects = [];\n canMove = itemRects.every((r) => {\n const newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id);\n\n // Check all current rects to make sure none overlap.\n const noOverlap = !rects.some((r) => Rect.intersects(newRect, r));\n\n newRects.push(newRect);\n return noOverlap;\n });\n\n // If none of the rectangles overlapped, the whole group can be centered.\n if (canMove) {\n finalRects = newRects;\n }\n }\n\n // If the items are not going to be offset, ensure that the original\n // placement for this row will not overlap previous rows (row-spanning\n // elements could be in the way).\n if (!canMove) {\n let intersectingRect;\n const hasOverlap = itemRects.some((itemRect) => rects.some((r) => {\n const intersects = Rect.intersects(itemRect, r);\n if (intersects) {\n intersectingRect = r;\n }\n return intersects;\n }));\n\n // If there is any overlap, replace the overlapping row with the original.\n if (hasOverlap) {\n const rowIndex = centeredRows.findIndex((items) => items.includes(intersectingRect));\n centeredRows.splice(rowIndex, 1, rows[rowIndex]);\n }\n }\n\n rects = rects.concat(finalRects);\n centeredRows.push(finalRects);\n });\n\n // Reduce array of arrays to a single array of points.\n // https://stackoverflow.com/a/10865042/373422\n // Then reset sort back to how the items were passed to this method.\n // Remove the wrapper object with index, map to a Point.\n return [].concat.apply([], centeredRows) // eslint-disable-line prefer-spread\n .sort((a, b) => (a.id - b.id))\n .map((itemRect) => new Point(itemRect.left, itemRect.top));\n}\n","/**\n * Hyphenates a javascript style string to a css one. For example:\n * MozBoxSizing -> -moz-box-sizing.\n * @param {string} str The string to hyphenate.\n * @return {string} The hyphenated string.\n */\nexport default function hyphenate(str) {\n return str.replace(/([A-Z])/g, (str, m1) => `-${m1.toLowerCase()}`);\n}\n","import TinyEmitter from 'tiny-emitter';\nimport matches from 'matches-selector';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\n\nimport Point from './point';\nimport Rect from './rect';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport {\n getItemPosition,\n getColumnSpan,\n getAvailablePositions,\n getShortColumn,\n getCenteredPositions,\n} from './layout';\nimport arrayMax from './array-max';\nimport hyphenate from './hyphenate';\n\nfunction arrayUnique(x) {\n return Array.from(new Set(x));\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle extends TinyEmitter {\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n super();\n // eslint-disable-next-line prefer-object-spread\n this.options = Object.assign({}, Shuffle.options, options);\n\n // Allow misspelling of delimiter since that's how it used to be.\n // Remove in v6.\n if (this.options.delimeter) {\n this.options.delimiter = this.options.delimeter;\n }\n\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems(this.items);\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // If the page has not already emitted the `load` event, call layout on load.\n // This avoids layout issues caused by images and fonts loading after the\n // instance has been initialized.\n if (document.readyState !== 'complete') {\n const layout = this.layout.bind(this);\n window.addEventListener('load', function onLoad() {\n window.removeEventListener('load', onLoad);\n layout();\n });\n }\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this.setItemTransitions(this.items);\n this.element.style.transition = `height ${this.options.speed}ms ${this.options.easing}`;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle\n ? this.options.throttle(resizeFunction, this.options.throttleTime)\n : resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n }\n\n // Check for an element\n if (option && option.nodeType && option.nodeType === 1) {\n return option;\n }\n\n // Check for jQuery object\n if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string|string[]|function(Element):boolean} [category] Category to\n * filter by. If it's given, the last category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|string[]|function(Element):boolean} category Category or function to filter by.\n * @param {ShuffleItem[]} items A collection of items to filter.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|string[]|function():boolean} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimiter\n ? attr.split(this.options.delimiter)\n : JSON.parse(attr);\n\n function testCategory(category) {\n return keys.includes(category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return keys.includes(category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {ShuffleItem[]} items Set to initialize.\n * @private\n */\n _initItems(items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @param {ShuffleItem[]} items Set to dispose.\n * @private\n */\n _disposeItems(items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of a new Shuffle instance.\n * @param {ShuffleItem[]} items Shuffle items to set transitions on.\n * @protected\n */\n setItemTransitions(items) {\n const { speed, easing } = this.options;\n const positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left'];\n\n // Allow users to transtion other properties if they exist in the `before`\n // css mapping of the shuffle item.\n const cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map((k) => hyphenate(k));\n const properties = positionProps.concat(cssProps).join();\n\n items.forEach((item) => {\n item.element.style.transitionDuration = speed + 'ms';\n item.element.style.transitionTimingFunction = easing;\n item.element.style.transitionProperty = properties;\n });\n }\n\n _getItems() {\n return Array.from(this.element.children)\n .filter((el) => matches(el, this.options.itemSelector))\n .map((el) => new ShuffleItem(el, this.options.isRTL));\n }\n\n /**\n * Combine the current items array with a new one and sort it by DOM order.\n * @param {ShuffleItem[]} items Items to track.\n * @return {ShuffleItem[]}\n */\n _mergeNewItems(items) {\n const children = Array.from(this.element.children);\n return sorter(this.items.concat(items), {\n by(element) {\n return children.indexOf(element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter((item) => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter((item) => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.options.sizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.options.sizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns)\n < this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns || 0), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * Emit an event from this instance.\n * @param {string} name Event name.\n * @param {Object} [data={}] Optional object data.\n */\n _dispatch(name, data = {}) {\n if (this.isDestroyed) {\n return;\n }\n\n data.shuffle = this;\n this.emit(name, data);\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {ShuffleItem[]} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n const itemPositions = this._getNextPositions(items);\n\n let count = 0;\n items.forEach((item, i) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = itemPositions[i];\n item.scale = ShuffleItem.Scale.VISIBLE;\n item.isHidden = false;\n\n // Clone the object so that the `before` object isn't modified when the\n // transition delay is added.\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Return an array of Point instances representing the future positions of\n * each item.\n * @param {ShuffleItem[]} items Array of sorted shuffle items.\n * @return {Point[]}\n * @private\n */\n _getNextPositions(items) {\n // If position data is going to be changed, add the item's size to the\n // transformer to allow for calculations.\n if (this.options.isCentered) {\n const itemsData = items.map((item, i) => {\n const itemSize = Shuffle.getSize(item.element, true);\n const point = this._getItemPosition(itemSize);\n return new Rect(point.x, point.y, itemSize.width, itemSize.height, i);\n });\n\n return this.getTransformedPositions(itemsData, this.containerWidth);\n }\n\n // If no transforms are going to happen, simply return an array of the\n // future points of each item.\n return items.map((item) => this._getItemPosition(Shuffle.getSize(item.element, true)));\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Mutate positions before they're applied.\n * @param {Rect[]} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Point[]}\n * @protected\n */\n getTransformedPositions(itemRects, containerWidth) {\n return getCenteredPositions(itemRects, containerWidth);\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {ShuffleItem[]} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.isHidden) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {ShuffleItem} item Item to get styles for. Should have updated\n * scale and point properties.\n * @param {Object} styleObject Extra styles that will be used in the transition.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @protected\n */\n getStylesForTransition(item, styleObject) {\n // Clone the object to avoid mutating the original.\n // eslint-disable-next-line prefer-object-spread\n const styles = Object.assign({}, styleObject);\n\n if (this.options.useTransforms) {\n const sign = this.options.isRTL ? '-' : '';\n const x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x;\n const y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y;\n styles.transform = `translate(${sign}${x}px, ${y}px) scale(${item.scale})`;\n } else {\n if (this.options.isRTL) {\n styles.right = item.point.x + 'px';\n } else {\n styles.left = item.point.x + 'px';\n }\n styles.top = item.point.y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {function} itemCallback Callback for the item.\n * @param {function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(opts.styles);\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatch(Shuffle.EventType.LAYOUT);\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Object[]} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map((obj) => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Object[]} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map((obj) => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(obj.styles);\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|string[]|function(Element):boolean} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {SortOptions} [sortOptions] A sort object which can sort the visible set\n */\n filter(category, sortOptions) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortOptions);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {SortOptions} [sortOptions] The options object to pass to `sorter`.\n */\n sort(sortOptions = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n const items = sorter(this._getFilteredItems(), sortOptions);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = sortOptions;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated.\n */\n update(isOnlyLayout = false) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Element[]} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map((el) => new ShuffleItem(el, this.options.isRTL));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Determine which items will go with the current filter.\n this._resetCols();\n\n const allItems = this._mergeNewItems(items);\n const sortedItems = sorter(allItems, this.lastSort);\n const allSortedItemsSet = this._filter(this.lastFilter, sortedItems);\n\n const isNewItem = (item) => items.includes(item);\n const applyHiddenState = (item) => {\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n };\n\n // Layout all items again so that new items get positions.\n // Synchonously apply positions.\n const itemPositions = this._getNextPositions(allSortedItemsSet.visible);\n allSortedItemsSet.visible.forEach((item, i) => {\n if (isNewItem(item)) {\n item.point = itemPositions[i];\n applyHiddenState(item);\n item.applyCss(this.getStylesForTransition(item, {}));\n }\n });\n\n allSortedItemsSet.hidden.forEach((item) => {\n if (isNewItem(item)) {\n applyHiddenState(item);\n }\n });\n\n // Cause layout so that the styles above are applied.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Add transition to each item.\n this.setItemTransitions(items);\n\n // Update the list of items.\n this.items = this._mergeNewItems(items);\n\n // Update layout/visibility of new and old items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout = true) {\n this.isEnabled = true;\n if (isUpdateLayout) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items.\n * @param {Element[]} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle instance.\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map((element) => this.getItemByElement(element))\n .filter((item) => !!item);\n\n const handleLayout = () => {\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter((item) => !oldItems.includes(item));\n this._updateItemCount();\n\n this.once(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or undefined if it's not found.\n */\n getItemByElement(element) {\n return this.items.find((item) => item.element === element);\n }\n\n /**\n * Dump the elements currently stored and reinitialize all child elements which\n * match the `itemSelector`.\n */\n resetItems() {\n // Remove refs to current items.\n this._disposeItems(this.items);\n this.isInitialized = false;\n\n // Find new items in the DOM.\n this.items = this._getItems();\n\n // Set initial styles on the new items.\n this._initItems(this.items);\n\n this.once(Shuffle.EventType.LAYOUT, () => {\n // Add transition to each item.\n this.setItemTransitions(this.items);\n this.isInitialized = true;\n });\n\n // Lay out all items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems(this.items);\n\n this.items.length = 0;\n this._transitions.length = 0;\n\n // Null DOM references\n this.options.sizer = null;\n this.element = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n this.isEnabled = false;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. The `offsetWidth` property.\n * - This value stays the same regardless of the elements transform property,\n * however, it does not return subpixel values.\n * 3. getComputedStyle()\n * - This works great Chrome, Firefox, Safari, but IE<=11 does not include\n * padding and border when box-sizing: border-box is set, requiring a feature\n * test and extra work to add the padding back for IE and other browsers which\n * follow the W3C spec here.\n *\n * @param {Element} element The element.\n * @param {boolean} [includeMargins=false] Whether to include margins.\n * @return {{width: number, height: number}} The width and height.\n */\n static getSize(element, includeMargins = false) {\n // Store the styles so that they can be used by others without asking for it again.\n const styles = window.getComputedStyle(element, null);\n let width = getNumberStyle(element, 'width', styles);\n let height = getNumberStyle(element, 'height', styles);\n\n if (includeMargins) {\n const marginLeft = getNumberStyle(element, 'marginLeft', styles);\n const marginRight = getNumberStyle(element, 'marginRight', styles);\n const marginTop = getNumberStyle(element, 'marginTop', styles);\n const marginBottom = getNumberStyle(element, 'marginBottom', styles);\n width += marginLeft + marginRight;\n height += marginTop + marginBottom;\n }\n\n return {\n width,\n height,\n };\n }\n\n /**\n * Change a property or execute a function which will not have a transition\n * @param {Element[]} elements DOM elements that won't be transitioned.\n * @param {function} callback A function which will be called while transition\n * is set to 0ms.\n * @private\n */\n static _skipTransitions(elements, callback) {\n const zero = '0ms';\n\n // Save current duration and delay.\n const data = elements.map((element) => {\n const { style } = element;\n const duration = style.transitionDuration;\n const delay = style.transitionDelay;\n\n // Set the duration to zero so it happens immediately\n style.transitionDuration = zero;\n style.transitionDelay = zero;\n\n return {\n duration,\n delay,\n };\n });\n\n callback();\n\n // Cause forced synchronous layout.\n elements[0].offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Put the duration back\n elements.forEach((element, i) => {\n element.style.transitionDuration = data[i].duration;\n element.style.transitionDelay = data[i].delay;\n });\n }\n}\n\nShuffle.ShuffleItem = ShuffleItem;\n\nShuffle.ALL_ITEMS = 'all';\nShuffle.FILTER_ATTRIBUTE_KEY = 'groups';\n\n/** @enum {string} */\nShuffle.EventType = {\n LAYOUT: 'shuffle:layout',\n REMOVED: 'shuffle:removed',\n};\n\n/** @enum {string} */\nShuffle.Classes = Classes;\n\n/** @enum {string} */\nShuffle.FilterMode = {\n ANY: 'any',\n ALL: 'all',\n};\n\n// Overrideable options\nShuffle.options = {\n // Initial filter group.\n group: Shuffle.ALL_ITEMS,\n\n // Transition/animation speed (milliseconds).\n speed: 250,\n\n // CSS easing function to use.\n easing: 'cubic-bezier(0.4, 0.0, 0.2, 1)',\n\n // e.g. '.picture-item'.\n itemSelector: '*',\n\n // Element or selector string. Use an element to determine the size of columns\n // and gutters.\n sizer: null,\n\n // A static number or function that tells the plugin how wide the gutters\n // between columns are (in pixels).\n gutterWidth: 0,\n\n // A static number or function that returns a number which tells the plugin\n // how wide the columns are (in pixels).\n columnWidth: 0,\n\n // If your group is not json, and is comma delimeted, you could set delimiter\n // to ','.\n delimiter: null,\n\n // Useful for percentage based heights when they might not always be exactly\n // the same (in pixels).\n buffer: 0,\n\n // Reading the width of elements isn't precise enough and can cause columns to\n // jump between values.\n columnThreshold: 0.01,\n\n // Shuffle can be isInitialized with a sort object. It is the same object\n // given to the sort method.\n initialSort: null,\n\n // By default, shuffle will throttle resize events. This can be changed or\n // removed.\n throttle,\n\n // How often shuffle can be called on resize (in milliseconds).\n throttleTime: 300,\n\n // Transition delay offset for each item in milliseconds.\n staggerAmount: 15,\n\n // Maximum stagger delay in milliseconds.\n staggerAmountMax: 150,\n\n // Whether to use transforms or absolute positioning.\n useTransforms: true,\n\n // Affects using an array with filter. e.g. `filter(['one', 'two'])`. With \"any\",\n // the element passes the test if any of its groups are in the array. With \"all\",\n // the element only passes if all groups are in the array.\n filterMode: Shuffle.FilterMode.ANY,\n\n // Attempt to center grid items in each row.\n isCentered: false,\n\n // Attempt to align grid items to right.\n isRTL: false,\n\n // Whether to round pixel values used in translate(x, y). This usually avoids\n // blurriness.\n roundTransforms: true,\n};\n\nShuffle.Point = Point;\nShuffle.Rect = Rect;\n\n// Expose for testing. Hack at your own risk.\nShuffle.__sorter = sorter;\nShuffle.__getColumnSpan = getColumnSpan;\nShuffle.__getAvailablePositions = getAvailablePositions;\nShuffle.__getShortColumn = getShortColumn;\nShuffle.__getCenteredPositions = getCenteredPositions;\n\nexport default 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this.items.find((e=>e.element===t))}resetItems(){this._disposeItems(this.items),this.isInitialized=!1,this.items=this._getItems(),this._initItems(this.items),this.once(A.EventType.LAYOUT,(()=>{this.setItemTransitions(this.items),this.isInitialized=!0})),this.filter(this.lastFilter)}destroy(){this._cancelMovement(),window.removeEventListener("resize",this._onResize),this.element.classList.remove("shuffle"),this.element.removeAttribute("style"),this._disposeItems(this.items),this.items.length=0,this._transitions.length=0,this.options.sizer=null,this.element=null,this.isDestroyed=!0,this.isEnabled=!1}static getSize(t,e=!1){const i=window.getComputedStyle(t,null);let s=g(t,"width",i),n=g(t,"height",i);if(e){s+=g(t,"marginLeft",i)+g(t,"marginRight",i),n+=g(t,"marginTop",i)+g(t,"marginBottom",i)}return{width:s,height:n}}static _skipTransitions(t,e){const i=t.map((t=>{const{style:e}=t,i=e.transitionDuration,s=e.transitionDelay;return 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N=0,B=function(e){!function(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function");t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,writable:!0,configurable:!0}}),e&&s(t,e)}(o,e);var n=r(o);function o(e){var i,s=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};t(this,o),(i=n.call(this)).options=Object.assign({},o.options,s),i.options.delimeter&&(i.options.delimiter=i.options.delimeter),i.lastSort={},i.group=o.ALL_ITEMS,i.lastFilter=o.ALL_ITEMS,i.isEnabled=!0,i.isDestroyed=!1,i.isInitialized=!1,i._transitions=[],i.isTransitioning=!1,i._queue=[];var r=i._getElementOption(e);if(!r)throw new TypeError("Shuffle needs to be initialized with an element.");return i.element=r,i.id="shuffle_"+N,N+=1,i._init(),i.isInitialized=!0,i}return i(o,[{key:"_init",value:function(){if(this.items=this._getItems(),this.options.sizer=this._getElementOption(this.options.sizer),this.element.classList.add(o.Classes.BASE),this._initItems(this.items),this._onResize=this._getResizeFunction(),window.addEventListener("resize",this._onResize),"complete"!==document.readyState){var t=this.layout.bind(this);window.addEventListener("load",(function e(){window.removeEventListener("load",e),t()}))}var e=window.getComputedStyle(this.element,null),i=o.getSize(this.element).width;this._validateStyles(e),this._setColumns(i),this.filter(this.options.group,this.options.initialSort),this.element.offsetWidth,this.setItemTransitions(this.items),this.element.style.transition="height ".concat(this.options.speed,"ms ").concat(this.options.easing)}},{key:"_getResizeFunction",value:function(){var t=this._handleResize.bind(this);return this.options.throttle?this.options.throttle(t,this.options.throttleTime):t}},{key:"_getElementOption",value:function(t){return"string"==typeof t?this.element.querySelector(t):t&&t.nodeType&&1===t.nodeType?t:t&&t.jquery?t[0]:null}},{key:"_validateStyles",value:function(t){"static"===t.position&&(this.element.style.position="relative"),"hidden"!==t.overflow&&(this.element.style.overflow="hidden")}},{key:"_filter",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.lastFilter,e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:this.items,i=this._getFilteredSets(t,e);return this._toggleFilterClasses(i),this.lastFilter=t,"string"==typeof t&&(this.group=t),i}},{key:"_getFilteredSets",value:function(t,e){var i=this,n=[],s=[];return t===o.ALL_ITEMS?n=e:e.forEach((function(e){i._doesPassFilter(t,e.element)?n.push(e):s.push(e)})),{visible:n,hidden:s}}},{key:"_doesPassFilter",value:function(t,e){if("function"==typeof t)return t.call(e,e,this);var i=e.getAttribute("data-"+o.FILTER_ATTRIBUTE_KEY),n=this.options.delimiter?i.split(this.options.delimiter):JSON.parse(i);function s(t){return n.includes(t)}return Array.isArray(t)?this.options.filterMode===o.FilterMode.ANY?t.some(s):t.every(s):n.includes(t)}},{key:"_toggleFilterClasses",value:function(t){var e=t.visible,i=t.hidden;e.forEach((function(t){t.show()})),i.forEach((function(t){t.hide()}))}},{key:"_initItems",value:function(t){t.forEach((function(t){t.init()}))}},{key:"_disposeItems",value:function(t){t.forEach((function(t){t.dispose()}))}},{key:"_updateItemCount",value:function(){this.visibleItems=this._getFilteredItems().length}},{key:"setItemTransitions",value:function(t){var e=this.options,i=e.speed,n=e.easing,s=this.options.useTransforms?["transform"]:["top","left"],o=Object.keys(E.Css.HIDDEN.before).map((function(t){return t.replace(/([A-Z])/g,(function(t,e){return"-".concat(e.toLowerCase())}))})),r=s.concat(o).join();t.forEach((function(t){t.element.style.transitionDuration=i+"ms",t.element.style.transitionTimingFunction=n,t.element.style.transitionProperty=r}))}},{key:"_getItems",value:function(){var t=this;return Array.from(this.element.children).filter((function(e){return c(e,t.options.itemSelector)})).map((function(e){return new E(e,t.options.isRTL)}))}},{key:"_mergeNewItems",value:function(t){var e=Array.from(this.element.children);return k(this.items.concat(t),{by:function(t){return e.indexOf(t)}})}},{key:"_getFilteredItems",value:function(){return this.items.filter((function(t){return t.isVisible}))}},{key:"_getConcealedItems",value:function(){return this.items.filter((function(t){return!t.isVisible}))}},{key:"_getColumnSize",value:function(t,e){var i;return 0===(i="function"==typeof 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n(){e.applyCss(E.Css.HIDDEN.after)}if(e.isHidden)return e.applyCss(E.Css.HIDDEN.before),void n();e.scale=E.Scale.HIDDEN,e.isHidden=!0;var s=t.getStylesForTransition(e,E.Css.HIDDEN.before);s.transitionDelay=t._getStaggerAmount(i)+"ms",t._queue.push({item:e,styles:s,callback:n}),i+=1}))}},{key:"_handleResize",value:function(){this.isEnabled&&!this.isDestroyed&&this.update()}},{key:"getStylesForTransition",value:function(t,e){var i=Object.assign({},e);if(this.options.useTransforms){var n=this.options.isRTL?"-":"",s=this.options.roundTransforms?Math.round(t.point.x):t.point.x,o=this.options.roundTransforms?Math.round(t.point.y):t.point.y;i.transform="translate(".concat(n).concat(s,"px, ").concat(o,"px) scale(").concat(t.scale,")")}else this.options.isRTL?i.right=t.point.x+"px":i.left=t.point.x+"px",i.top=t.point.y+"px";return i}},{key:"_whenTransitionDone",value:function(t,e,i){var n=z(t,(function(t){e(),i(null,t)}));this._transitions.push(n)}},{key:"_getTransitionFunction",value:function(t){var e=this;return function(i){t.item.applyCss(t.styles),e._whenTransitionDone(t.item.element,t.callback,i)}}},{key:"_processQueue",value:function(){this.isTransitioning&&this._cancelMovement();var t=this.options.speed>0,e=this._queue.length>0;e&&t&&this.isInitialized?this._startTransitions(this._queue):e?(this._styleImmediately(this._queue),this._dispatch(o.EventType.LAYOUT)):this._dispatch(o.EventType.LAYOUT),this._queue.length=0}},{key:"_startTransitions",value:function(t){var e=this;this.isTransitioning=!0,function(t,e,i){i||("function"==typeof e?(i=e,e=null):i=p);var n=t&&t.length;if(!n)return i(null,[]);var s=!1,o=new Array(n);function r(t){return function(e,r){if(!s){if(e)return i(e,o),void(s=!0);o[t]=r,--n||i(null,o)}}}t.forEach(e?function(t,i){t.call(e,r(i))}:function(t,e){t(r(e))})}(t.map((function(t){return e._getTransitionFunction(t)})),this._movementFinished.bind(this))}},{key:"_cancelMovement",value:function(){this._transitions.forEach(D),this._transitions.length=0,this.isTransitioning=!1}},{key:"_styleImmediately",value:function(t){if(t.length){var e=t.map((function(t){return t.item.element}));o._skipTransitions(e,(function(){t.forEach((function(t){t.item.applyCss(t.styles),t.callback()}))}))}}},{key:"_movementFinished",value:function(){this._transitions.length=0,this.isTransitioning=!1,this._dispatch(o.EventType.LAYOUT)}},{key:"filter",value:function(t,e){this.isEnabled&&((!t||t&&0===t.length)&&(t=o.ALL_ITEMS),this._filter(t),this._shrink(),this._updateItemCount(),this.sort(e))}},{key:"sort",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.lastSort;if(this.isEnabled){this._resetCols();var e=k(this._getFilteredItems(),t);this._layout(e),this._processQueue(),this._setContainerSize(),this.lastSort=t}}},{key:"update",value:function(){var t=arguments.length>0&&void 0!==arguments[0]&&arguments[0];this.isEnabled&&(t||this._setColumns(),this.sort())}},{key:"layout",value:function(){this.update(!0)}},{key:"add",value:function(t){var e=this,i=R(t).map((function(t){return new E(t,e.options.isRTL)}));this._initItems(i),this._resetCols();var n=k(this._mergeNewItems(i),this.lastSort),s=this._filter(this.lastFilter,n),o=function(t){return i.includes(t)},r=function(t){t.scale=E.Scale.HIDDEN,t.isHidden=!0,t.applyCss(E.Css.HIDDEN.before),t.applyCss(E.Css.HIDDEN.after)},l=this._getNextPositions(s.visible);s.visible.forEach((function(t,i){o(t)&&(t.point=l[i],r(t),t.applyCss(e.getStylesForTransition(t,{})))})),s.hidden.forEach((function(t){o(t)&&r(t)})),this.element.offsetWidth,this.setItemTransitions(i),this.items=this._mergeNewItems(i),this.filter(this.lastFilter)}},{key:"disable",value:function(){this.isEnabled=!1}},{key:"enable",value:function(){var t=!(arguments.length>0&&void 0!==arguments[0])||arguments[0];this.isEnabled=!0,t&&this.update()}},{key:"remove",value:function(t){var e=this;if(t.length){var i=R(t),n=i.map((function(t){return e.getItemByElement(t)})).filter((function(t){return!!t}));this._toggleFilterClasses({visible:[],hidden:n}),this._shrink(n),this.sort(),this.items=this.items.filter((function(t){return!n.includes(t)})),this._updateItemCount(),this.once(o.EventType.LAYOUT,(function(){e._disposeItems(n),i.forEach((function(t){t.parentNode.removeChild(t)})),e._dispatch(o.EventType.REMOVED,{collection:i})}))}}},{key:"getItemByElement",value:function(t){return this.items.find((function(e){return e.element===t}))}},{key:"resetItems",value:function(){var t=this;this._disposeItems(this.items),this.isInitialized=!1,this.items=this._getItems(),this._initItems(this.items),this.once(o.EventType.LAYOUT,(function(){t.setItemTransitions(t.items),t.isInitialized=!0})),this.filter(this.lastFilter)}},{key:"destroy",value:function(){this._cancelMovement(),window.removeEventListener("resize",this._onResize),this.element.classList.remove("shuffle"),this.element.removeAttribute("style"),this._disposeItems(this.items),this.items.length=0,this._transitions.length=0,this.options.sizer=null,this.element=null,this.isDestroyed=!0,this.isEnabled=!1}}],[{key:"getSize",value:function(t){var e=arguments.length>1&&void 0!==arguments[1]&&arguments[1],i=window.getComputedStyle(t,null),n=T(t,"width",i),s=T(t,"height",i);if(e){var o=T(t,"marginLeft",i),r=T(t,"marginRight",i),l=T(t,"marginTop",i),a=T(t,"marginBottom",i);n+=o+r,s+=l+a}return{width:n,height:s}}},{key:"_skipTransitions",value:function(t,e){var i=t.map((function(t){var e=t.style,i=e.transitionDuration,n=e.transitionDelay;return e.transitionDuration="0ms",e.transitionDelay="0ms",{duration:i,delay:n}}));e(),t[0].offsetWidth,t.forEach((function(t,e){t.style.transitionDuration=i[e].duration,t.style.transitionDelay=i[e].delay}))}}]),o}(a);return B.ShuffleItem=E,B.ALL_ITEMS="all",B.FILTER_ATTRIBUTE_KEY="groups",B.EventType={LAYOUT:"shuffle:layout",REMOVED:"shuffle:removed"},B.Classes=g,B.FilterMode={ANY:"any",ALL:"all"},B.options={group:B.ALL_ITEMS,speed:250,easing:"cubic-bezier(0.4, 0.0, 0.2, 1)",itemSelector:"*",sizer:null,gutterWidth:0,columnWidth:0,delimiter:null,buffer:0,columnThreshold:.01,initialSort:null,throttle:d,throttleTime:300,staggerAmount:15,staggerAmountMax:150,useTransforms:!0,filterMode:B.FilterMode.ANY,isCentered:!1,isRTL:!1,roundTransforms:!0},B.Point=v,B.Rect=y,B.__sorter=k,B.__getColumnSpan=A,B.__getAvailablePositions=F,B.__getShortColumn=x,B.__getCenteredPositions=O,B})); //# sourceMappingURL=shuffle.min.js.map diff --git a/dist/shuffle.min.js.map b/dist/shuffle.min.js.map index a9d9ddb..50199b1 100644 --- a/dist/shuffle.min.js.map +++ b/dist/shuffle.min.js.map @@ -1 +1 @@ -{"version":3,"file":"shuffle.min.js","sources":["../node_modules/tiny-emitter/index.js","../node_modules/matches-selector/index.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/point.js","../src/rect.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/layout.js","../src/array-min.js","../src/shuffle.js","../src/hyphenate.js"],"sourcesContent":["function E () {\n // Keep this empty so it's easier to inherit from\n // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)\n}\n\nE.prototype = {\n on: function (name, callback, ctx) {\n var e = this.e || (this.e = {});\n\n (e[name] || (e[name] = [])).push({\n fn: callback,\n ctx: ctx\n });\n\n return this;\n },\n\n once: function (name, callback, ctx) {\n var self = this;\n function listener () {\n self.off(name, listener);\n callback.apply(ctx, arguments);\n };\n\n listener._ = callback\n return this.on(name, listener, ctx);\n },\n\n emit: function (name) {\n var data = [].slice.call(arguments, 1);\n var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n var i = 0;\n var len = evtArr.length;\n\n for (i; i < len; i++) {\n evtArr[i].fn.apply(evtArr[i].ctx, data);\n }\n\n return this;\n },\n\n off: function (name, callback) {\n var e = this.e || (this.e = {});\n var evts = e[name];\n var liveEvents = [];\n\n if (evts && callback) {\n for (var i = 0, len = evts.length; i < len; i++) {\n if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n liveEvents.push(evts[i]);\n }\n }\n\n // Remove event from queue to prevent memory leak\n // Suggested by https://github.com/lazd\n // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n (liveEvents.length)\n ? e[name] = liveEvents\n : delete e[name];\n\n return this;\n }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n","'use strict';\n\nvar proto = typeof Element !== 'undefined' ? Element.prototype : {};\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (!el || el.nodeType !== 1) return false;\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\n\nclass Point {\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default class Rect {\n /**\n * Class for representing rectangular regions.\n * https://github.com/google/closure-library/blob/master/closure/goog/math/rect.js\n * @param {number} x Left.\n * @param {number} y Top.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} id Identifier\n * @constructor\n */\n constructor(x, y, w, h, id) {\n this.id = id;\n\n /** @type {number} */\n this.left = x;\n\n /** @type {number} */\n this.top = y;\n\n /** @type {number} */\n this.width = w;\n\n /** @type {number} */\n this.height = h;\n }\n\n /**\n * Returns whether two rectangles intersect.\n * @param {Rect} a A Rectangle.\n * @param {Rect} b A Rectangle.\n * @return {boolean} Whether a and b intersect.\n */\n static intersects(a, b) {\n return (\n a.left < b.left + b.width && b.left < a.left + a.width\n && a.top < b.top + b.height && b.top < a.top + a.height);\n }\n}\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element, isRTL) {\n id += 1;\n this.id = id;\n this.element = element;\n\n /**\n * Set correct direction of item\n */\n this.isRTL = isRTL;\n\n /**\n * Used to separate items for layout and shrink.\n */\n this.isVisible = true;\n\n /**\n * Used to determine if a transition will happen. By the time the _layout\n * and _shrink methods get the ShuffleItem instances, the `isVisible` value\n * has already been changed by the separation methods, so this property is\n * needed to know if the item was visible/hidden before the shrink/layout.\n */\n this.isHidden = false;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n this.element.removeAttribute('aria-hidden');\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n this.element.setAttribute('aria-hidden', true);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.applyCss(this.isRTL ? ShuffleItem.Css.DIRECTION.rtl : ShuffleItem.Css.DIRECTION.ltr);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n visibility: 'visible',\n willChange: 'transform',\n },\n DIRECTION: {\n ltr: {\n left: 0,\n },\n rtl: {\n right: 0,\n },\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {\n transitionDelay: '',\n },\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n transitionDelay: '',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","let value = null;\nexport default () => {\n if (value !== null) {\n return value;\n }\n\n const element = document.body || document.documentElement;\n const e = document.createElement('div');\n e.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;';\n element.appendChild(e);\n\n value = window.getComputedStyle(e, null).width === '10px';\n\n element.removeChild(e);\n\n return value;\n};\n","import getNumber from './get-number';\nimport testComputedSize from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(\n element, style,\n styles = window.getComputedStyle(element, null),\n) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!testComputedSize() && style === 'width') {\n value += getNumber(styles.paddingLeft)\n + getNumber(styles.paddingRight)\n + getNumber(styles.borderLeftWidth)\n + getNumber(styles.borderRightWidth);\n } else if (!testComputedSize() && style === 'height') {\n value += getNumber(styles.paddingTop)\n + getNumber(styles.paddingBottom)\n + getNumber(styles.borderTopWidth)\n + getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // Custom sort function\n compare: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n/**\n * You can return `undefined` from the `by` function to revert to DOM order.\n * @param {Array} arr Array to sort.\n * @param {SortOptions} options Sorting options.\n * @return {Array}\n */\nexport default function sorter(arr, options) {\n // eslint-disable-next-line prefer-object-spread\n const opts = Object.assign({}, defaults, options);\n const original = Array.from(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n } else if (typeof opts.compare === 'function') {\n arr.sort(opts.compare);\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport Rect from './rect';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 10]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 10]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({\n itemSize, positions, gridSize, total, threshold, buffer,\n}) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]);\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n\n/**\n * This method attempts to center items. This method could potentially be slow\n * with a large number of items because it must place items, then check every\n * previous item to ensure there is no overlap.\n * @param {Array.} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Array.}\n */\nexport function getCenteredPositions(itemRects, containerWidth) {\n const rowMap = {};\n\n // Populate rows by their offset because items could jump between rows like:\n // a c\n // bbb\n itemRects.forEach((itemRect) => {\n if (rowMap[itemRect.top]) {\n // Push the point to the last row array.\n rowMap[itemRect.top].push(itemRect);\n } else {\n // Start of a new row.\n rowMap[itemRect.top] = [itemRect];\n }\n });\n\n // For each row, find the end of the last item, then calculate\n // the remaining space by dividing it by 2. Then add that\n // offset to the x position of each point.\n let rects = [];\n const rows = [];\n const centeredRows = [];\n Object.keys(rowMap).forEach((key) => {\n const itemRects = rowMap[key];\n rows.push(itemRects);\n const lastItem = itemRects[itemRects.length - 1];\n const end = lastItem.left + lastItem.width;\n const offset = Math.round((containerWidth - end) / 2);\n\n let finalRects = itemRects;\n let canMove = false;\n if (offset > 0) {\n const newRects = [];\n canMove = itemRects.every((r) => {\n const newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id);\n\n // Check all current rects to make sure none overlap.\n const noOverlap = !rects.some((r) => Rect.intersects(newRect, r));\n\n newRects.push(newRect);\n return noOverlap;\n });\n\n // If none of the rectangles overlapped, the whole group can be centered.\n if (canMove) {\n finalRects = newRects;\n }\n }\n\n // If the items are not going to be offset, ensure that the original\n // placement for this row will not overlap previous rows (row-spanning\n // elements could be in the way).\n if (!canMove) {\n let intersectingRect;\n const hasOverlap = itemRects.some((itemRect) => rects.some((r) => {\n const intersects = Rect.intersects(itemRect, r);\n if (intersects) {\n intersectingRect = r;\n }\n return intersects;\n }));\n\n // If there is any overlap, replace the overlapping row with the original.\n if (hasOverlap) {\n const rowIndex = centeredRows.findIndex((items) => items.includes(intersectingRect));\n centeredRows.splice(rowIndex, 1, rows[rowIndex]);\n }\n }\n\n rects = rects.concat(finalRects);\n centeredRows.push(finalRects);\n });\n\n // Reduce array of arrays to a single array of points.\n // https://stackoverflow.com/a/10865042/373422\n // Then reset sort back to how the items were passed to this method.\n // Remove the wrapper object with index, map to a Point.\n return [].concat.apply([], centeredRows) // eslint-disable-line prefer-spread\n .sort((a, b) => (a.id - b.id))\n .map((itemRect) => new Point(itemRect.left, itemRect.top));\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import TinyEmitter from 'tiny-emitter';\nimport matches from 'matches-selector';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\n\nimport Point from './point';\nimport Rect from './rect';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport {\n getItemPosition,\n getColumnSpan,\n getAvailablePositions,\n getShortColumn,\n getCenteredPositions,\n} from './layout';\nimport arrayMax from './array-max';\nimport hyphenate from './hyphenate';\n\nfunction arrayUnique(x) {\n return Array.from(new Set(x));\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle extends TinyEmitter {\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n super();\n // eslint-disable-next-line prefer-object-spread\n this.options = Object.assign({}, Shuffle.options, options);\n\n // Allow misspelling of delimiter since that's how it used to be.\n // Remove in v6.\n if (this.options.delimeter) {\n this.options.delimiter = this.options.delimeter;\n }\n\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems(this.items);\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // If the page has not already emitted the `load` event, call layout on load.\n // This avoids layout issues caused by images and fonts loading after the\n // instance has been initialized.\n if (document.readyState !== 'complete') {\n const layout = this.layout.bind(this);\n window.addEventListener('load', function onLoad() {\n window.removeEventListener('load', onLoad);\n layout();\n });\n }\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this.setItemTransitions(this.items);\n this.element.style.transition = `height ${this.options.speed}ms ${this.options.easing}`;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle\n ? this.options.throttle(resizeFunction, this.options.throttleTime)\n : resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n }\n\n // Check for an element\n if (option && option.nodeType && option.nodeType === 1) {\n return option;\n }\n\n // Check for jQuery object\n if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string|string[]|function(Element):boolean} [category] Category to\n * filter by. If it's given, the last category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|string[]|function(Element):boolean} category Category or function to filter by.\n * @param {ShuffleItem[]} items A collection of items to filter.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|string[]|function():boolean} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimiter\n ? attr.split(this.options.delimiter)\n : JSON.parse(attr);\n\n function testCategory(category) {\n return keys.includes(category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return keys.includes(category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {ShuffleItem[]} items Set to initialize.\n * @private\n */\n _initItems(items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @param {ShuffleItem[]} items Set to dispose.\n * @private\n */\n _disposeItems(items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of a new Shuffle instance.\n * @param {ShuffleItem[]} items Shuffle items to set transitions on.\n * @protected\n */\n setItemTransitions(items) {\n const { speed, easing } = this.options;\n const positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left'];\n\n // Allow users to transtion other properties if they exist in the `before`\n // css mapping of the shuffle item.\n const cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map((k) => hyphenate(k));\n const properties = positionProps.concat(cssProps).join();\n\n items.forEach((item) => {\n item.element.style.transitionDuration = speed + 'ms';\n item.element.style.transitionTimingFunction = easing;\n item.element.style.transitionProperty = properties;\n });\n }\n\n _getItems() {\n return Array.from(this.element.children)\n .filter((el) => matches(el, this.options.itemSelector))\n .map((el) => new ShuffleItem(el, this.options.isRTL));\n }\n\n /**\n * Combine the current items array with a new one and sort it by DOM order.\n * @param {ShuffleItem[]} items Items to track.\n * @return {ShuffleItem[]}\n */\n _mergeNewItems(items) {\n const children = Array.from(this.element.children);\n return sorter(this.items.concat(items), {\n by(element) {\n return children.indexOf(element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter((item) => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter((item) => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.options.sizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.options.sizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns)\n < this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns || 0), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * Emit an event from this instance.\n * @param {string} name Event name.\n * @param {Object} [data={}] Optional object data.\n */\n _dispatch(name, data = {}) {\n if (this.isDestroyed) {\n return;\n }\n\n data.shuffle = this;\n this.emit(name, data);\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {ShuffleItem[]} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n const itemPositions = this._getNextPositions(items);\n\n let count = 0;\n items.forEach((item, i) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = itemPositions[i];\n item.scale = ShuffleItem.Scale.VISIBLE;\n item.isHidden = false;\n\n // Clone the object so that the `before` object isn't modified when the\n // transition delay is added.\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Return an array of Point instances representing the future positions of\n * each item.\n * @param {ShuffleItem[]} items Array of sorted shuffle items.\n * @return {Point[]}\n * @private\n */\n _getNextPositions(items) {\n // If position data is going to be changed, add the item's size to the\n // transformer to allow for calculations.\n if (this.options.isCentered) {\n const itemsData = items.map((item, i) => {\n const itemSize = Shuffle.getSize(item.element, true);\n const point = this._getItemPosition(itemSize);\n return new Rect(point.x, point.y, itemSize.width, itemSize.height, i);\n });\n\n return this.getTransformedPositions(itemsData, this.containerWidth);\n }\n\n // If no transforms are going to happen, simply return an array of the\n // future points of each item.\n return items.map((item) => this._getItemPosition(Shuffle.getSize(item.element, true)));\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Mutate positions before they're applied.\n * @param {Rect[]} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Point[]}\n * @protected\n */\n getTransformedPositions(itemRects, containerWidth) {\n return getCenteredPositions(itemRects, containerWidth);\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {ShuffleItem[]} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.isHidden) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {ShuffleItem} item Item to get styles for. Should have updated\n * scale and point properties.\n * @param {Object} styleObject Extra styles that will be used in the transition.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @protected\n */\n getStylesForTransition(item, styleObject) {\n // Clone the object to avoid mutating the original.\n // eslint-disable-next-line prefer-object-spread\n const styles = Object.assign({}, styleObject);\n\n if (this.options.useTransforms) {\n const sign = this.options.isRTL ? '-' : '';\n const x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x;\n const y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y;\n styles.transform = `translate(${sign}${x}px, ${y}px) scale(${item.scale})`;\n } else {\n if (this.options.isRTL) {\n styles.right = item.point.x + 'px';\n } else {\n styles.left = item.point.x + 'px';\n }\n styles.top = item.point.y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {function} itemCallback Callback for the item.\n * @param {function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(opts.styles);\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. 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This is what makes the plugin 'shuffle'\n * @param {string|string[]|function(Element):boolean} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {SortOptions} [sortOptions] A sort object which can sort the visible set\n */\n filter(category, sortOptions) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortOptions);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {SortOptions} [sortOptions] The options object to pass to `sorter`.\n */\n sort(sortOptions = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n const items = sorter(this._getFilteredItems(), sortOptions);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = sortOptions;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated.\n */\n update(isOnlyLayout = false) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Element[]} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map((el) => new ShuffleItem(el, this.options.isRTL));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Determine which items will go with the current filter.\n this._resetCols();\n\n const allItems = this._mergeNewItems(items);\n const sortedItems = sorter(allItems, this.lastSort);\n const allSortedItemsSet = this._filter(this.lastFilter, sortedItems);\n\n const isNewItem = (item) => items.includes(item);\n const applyHiddenState = (item) => {\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n };\n\n // Layout all items again so that new items get positions.\n // Synchonously apply positions.\n const itemPositions = this._getNextPositions(allSortedItemsSet.visible);\n allSortedItemsSet.visible.forEach((item, i) => {\n if (isNewItem(item)) {\n item.point = itemPositions[i];\n applyHiddenState(item);\n item.applyCss(this.getStylesForTransition(item, {}));\n }\n });\n\n allSortedItemsSet.hidden.forEach((item) => {\n if (isNewItem(item)) {\n applyHiddenState(item);\n }\n });\n\n // Cause layout so that the styles above are applied.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Add transition to each item.\n this.setItemTransitions(items);\n\n // Update the list of items.\n this.items = this._mergeNewItems(items);\n\n // Update layout/visibility of new and old items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout = true) {\n this.isEnabled = true;\n if (isUpdateLayout) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items.\n * @param {Element[]} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle instance.\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map((element) => this.getItemByElement(element))\n .filter((item) => !!item);\n\n const handleLayout = () => {\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter((item) => !oldItems.includes(item));\n this._updateItemCount();\n\n this.once(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or undefined if it's not found.\n */\n getItemByElement(element) {\n return this.items.find((item) => item.element === element);\n }\n\n /**\n * Dump the elements currently stored and reinitialize all child elements which\n * match the `itemSelector`.\n */\n resetItems() {\n // Remove refs to current items.\n this._disposeItems(this.items);\n this.isInitialized = false;\n\n // Find new items in the DOM.\n this.items = this._getItems();\n\n // Set initial styles on the new items.\n this._initItems(this.items);\n\n this.once(Shuffle.EventType.LAYOUT, () => {\n // Add transition to each item.\n this.setItemTransitions(this.items);\n this.isInitialized = true;\n });\n\n // Lay out all items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems(this.items);\n\n this.items.length = 0;\n this._transitions.length = 0;\n\n // Null DOM references\n this.options.sizer = null;\n this.element = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n this.isEnabled = false;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. 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\ No newline at end of file +{"version":3,"file":"shuffle.min.js","sources":["../node_modules/tiny-emitter/index.js","../node_modules/matches-selector/index.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/point.js","../src/rect.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/layout.js","../src/array-min.js","../src/shuffle.js","../src/hyphenate.js"],"sourcesContent":["function E () {\n // Keep this empty so it's easier to inherit from\n // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)\n}\n\nE.prototype = {\n on: function (name, callback, ctx) {\n var e = this.e || (this.e = {});\n\n (e[name] || (e[name] = [])).push({\n fn: callback,\n ctx: ctx\n });\n\n return this;\n },\n\n once: function (name, callback, ctx) {\n var self = this;\n function listener () {\n self.off(name, listener);\n callback.apply(ctx, arguments);\n };\n\n listener._ = callback\n return this.on(name, listener, ctx);\n },\n\n emit: function (name) {\n var data = [].slice.call(arguments, 1);\n var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n var i = 0;\n var len = evtArr.length;\n\n for (i; i < len; i++) {\n evtArr[i].fn.apply(evtArr[i].ctx, data);\n }\n\n return this;\n },\n\n off: function (name, callback) {\n var e = this.e || (this.e = {});\n var evts = e[name];\n var liveEvents = [];\n\n if (evts && callback) {\n for (var i = 0, len = evts.length; i < len; i++) {\n if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n liveEvents.push(evts[i]);\n }\n }\n\n // Remove event from queue to prevent memory leak\n // Suggested by https://github.com/lazd\n // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n (liveEvents.length)\n ? e[name] = liveEvents\n : delete e[name];\n\n return this;\n }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n","'use strict';\n\nvar proto = typeof Element !== 'undefined' ? Element.prototype : {};\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (!el || el.nodeType !== 1) return false;\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\n\nclass Point {\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default class Rect {\n /**\n * Class for representing rectangular regions.\n * https://github.com/google/closure-library/blob/master/closure/goog/math/rect.js\n * @param {number} x Left.\n * @param {number} y Top.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} id Identifier\n * @constructor\n */\n constructor(x, y, w, h, id) {\n this.id = id;\n\n /** @type {number} */\n this.left = x;\n\n /** @type {number} */\n this.top = y;\n\n /** @type {number} */\n this.width = w;\n\n /** @type {number} */\n this.height = h;\n }\n\n /**\n * Returns whether two rectangles intersect.\n * @param {Rect} a A Rectangle.\n * @param {Rect} b A Rectangle.\n * @return {boolean} Whether a and b intersect.\n */\n static intersects(a, b) {\n return (\n a.left < b.left + b.width && b.left < a.left + a.width\n && a.top < b.top + b.height && b.top < a.top + a.height);\n }\n}\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element, isRTL) {\n id += 1;\n this.id = id;\n this.element = element;\n\n /**\n * Set correct direction of item\n */\n this.isRTL = isRTL;\n\n /**\n * Used to separate items for layout and shrink.\n */\n this.isVisible = true;\n\n /**\n * Used to determine if a transition will happen. By the time the _layout\n * and _shrink methods get the ShuffleItem instances, the `isVisible` value\n * has already been changed by the separation methods, so this property is\n * needed to know if the item was visible/hidden before the shrink/layout.\n */\n this.isHidden = false;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n this.element.removeAttribute('aria-hidden');\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n this.element.setAttribute('aria-hidden', true);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.applyCss(this.isRTL ? ShuffleItem.Css.DIRECTION.rtl : ShuffleItem.Css.DIRECTION.ltr);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n visibility: 'visible',\n willChange: 'transform',\n },\n DIRECTION: {\n ltr: {\n left: 0,\n },\n rtl: {\n right: 0,\n },\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {\n transitionDelay: '',\n },\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n transitionDelay: '',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","let value = null;\nexport default () => {\n if (value !== null) {\n return value;\n }\n\n const element = document.body || document.documentElement;\n const e = document.createElement('div');\n e.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;';\n element.appendChild(e);\n\n value = window.getComputedStyle(e, null).width === '10px';\n\n element.removeChild(e);\n\n return value;\n};\n","import getNumber from './get-number';\nimport testComputedSize from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(\n element, style,\n styles = window.getComputedStyle(element, null),\n) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!testComputedSize() && style === 'width') {\n value += getNumber(styles.paddingLeft)\n + getNumber(styles.paddingRight)\n + getNumber(styles.borderLeftWidth)\n + getNumber(styles.borderRightWidth);\n } else if (!testComputedSize() && style === 'height') {\n value += getNumber(styles.paddingTop)\n + getNumber(styles.paddingBottom)\n + getNumber(styles.borderTopWidth)\n + getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // Custom sort function\n compare: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n/**\n * You can return `undefined` from the `by` function to revert to DOM order.\n * @param {Array} arr Array to sort.\n * @param {SortOptions} options Sorting options.\n * @return {Array}\n */\nexport default function sorter(arr, options) {\n // eslint-disable-next-line prefer-object-spread\n const opts = Object.assign({}, defaults, options);\n const original = Array.from(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n } else if (typeof opts.compare === 'function') {\n arr.sort(opts.compare);\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport Rect from './rect';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 10]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 10]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({\n itemSize, positions, gridSize, total, threshold, buffer,\n}) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]);\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n\n/**\n * This method attempts to center items. This method could potentially be slow\n * with a large number of items because it must place items, then check every\n * previous item to ensure there is no overlap.\n * @param {Array.} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Array.}\n */\nexport function getCenteredPositions(itemRects, containerWidth) {\n const rowMap = {};\n\n // Populate rows by their offset because items could jump between rows like:\n // a c\n // bbb\n itemRects.forEach((itemRect) => {\n if (rowMap[itemRect.top]) {\n // Push the point to the last row array.\n rowMap[itemRect.top].push(itemRect);\n } else {\n // Start of a new row.\n rowMap[itemRect.top] = [itemRect];\n }\n });\n\n // For each row, find the end of the last item, then calculate\n // the remaining space by dividing it by 2. Then add that\n // offset to the x position of each point.\n let rects = [];\n const rows = [];\n const centeredRows = [];\n Object.keys(rowMap).forEach((key) => {\n const itemRects = rowMap[key];\n rows.push(itemRects);\n const lastItem = itemRects[itemRects.length - 1];\n const end = lastItem.left + lastItem.width;\n const offset = Math.round((containerWidth - end) / 2);\n\n let finalRects = itemRects;\n let canMove = false;\n if (offset > 0) {\n const newRects = [];\n canMove = itemRects.every((r) => {\n const newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id);\n\n // Check all current rects to make sure none overlap.\n const noOverlap = !rects.some((r) => Rect.intersects(newRect, r));\n\n newRects.push(newRect);\n return noOverlap;\n });\n\n // If none of the rectangles overlapped, the whole group can be centered.\n if (canMove) {\n finalRects = newRects;\n }\n }\n\n // If the items are not going to be offset, ensure that the original\n // placement for this row will not overlap previous rows (row-spanning\n // elements could be in the way).\n if (!canMove) {\n let intersectingRect;\n const hasOverlap = itemRects.some((itemRect) => rects.some((r) => {\n const intersects = Rect.intersects(itemRect, r);\n if (intersects) {\n intersectingRect = r;\n }\n return intersects;\n }));\n\n // If there is any overlap, replace the overlapping row with the original.\n if (hasOverlap) {\n const rowIndex = centeredRows.findIndex((items) => items.includes(intersectingRect));\n centeredRows.splice(rowIndex, 1, rows[rowIndex]);\n }\n }\n\n rects = rects.concat(finalRects);\n centeredRows.push(finalRects);\n });\n\n // Reduce array of arrays to a single array of points.\n // https://stackoverflow.com/a/10865042/373422\n // Then reset sort back to how the items were passed to this method.\n // Remove the wrapper object with index, map to a Point.\n return [].concat.apply([], centeredRows) // eslint-disable-line prefer-spread\n .sort((a, b) => (a.id - b.id))\n .map((itemRect) => new Point(itemRect.left, itemRect.top));\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import TinyEmitter from 'tiny-emitter';\nimport matches from 'matches-selector';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\n\nimport Point from './point';\nimport Rect from './rect';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport {\n getItemPosition,\n getColumnSpan,\n getAvailablePositions,\n getShortColumn,\n getCenteredPositions,\n} from './layout';\nimport arrayMax from './array-max';\nimport hyphenate from './hyphenate';\n\nfunction arrayUnique(x) {\n return Array.from(new Set(x));\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle extends TinyEmitter {\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n super();\n // eslint-disable-next-line prefer-object-spread\n this.options = Object.assign({}, Shuffle.options, options);\n\n // Allow misspelling of delimiter since that's how it used to be.\n // Remove in v6.\n if (this.options.delimeter) {\n this.options.delimiter = this.options.delimeter;\n }\n\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems(this.items);\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // If the page has not already emitted the `load` event, call layout on load.\n // This avoids layout issues caused by images and fonts loading after the\n // instance has been initialized.\n if (document.readyState !== 'complete') {\n const layout = this.layout.bind(this);\n window.addEventListener('load', function onLoad() {\n window.removeEventListener('load', onLoad);\n layout();\n });\n }\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this.setItemTransitions(this.items);\n this.element.style.transition = `height ${this.options.speed}ms ${this.options.easing}`;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle\n ? this.options.throttle(resizeFunction, this.options.throttleTime)\n : resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n }\n\n // Check for an element\n if (option && option.nodeType && option.nodeType === 1) {\n return option;\n }\n\n // Check for jQuery object\n if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string|string[]|function(Element):boolean} [category] Category to\n * filter by. If it's given, the last category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|string[]|function(Element):boolean} category Category or function to filter by.\n * @param {ShuffleItem[]} items A collection of items to filter.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|string[]|function():boolean} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimiter\n ? attr.split(this.options.delimiter)\n : JSON.parse(attr);\n\n function testCategory(category) {\n return keys.includes(category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return keys.includes(category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {ShuffleItem[]} items Set to initialize.\n * @private\n */\n _initItems(items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @param {ShuffleItem[]} items Set to dispose.\n * @private\n */\n _disposeItems(items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of a new Shuffle instance.\n * @param {ShuffleItem[]} items Shuffle items to set transitions on.\n * @protected\n */\n setItemTransitions(items) {\n const { speed, easing } = this.options;\n const positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left'];\n\n // Allow users to transtion other properties if they exist in the `before`\n // css mapping of the shuffle item.\n const cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map((k) => hyphenate(k));\n const properties = positionProps.concat(cssProps).join();\n\n items.forEach((item) => {\n item.element.style.transitionDuration = speed + 'ms';\n item.element.style.transitionTimingFunction = easing;\n item.element.style.transitionProperty = properties;\n });\n }\n\n _getItems() {\n return Array.from(this.element.children)\n .filter((el) => matches(el, this.options.itemSelector))\n .map((el) => new ShuffleItem(el, this.options.isRTL));\n }\n\n /**\n * Combine the current items array with a new one and sort it by DOM order.\n * @param {ShuffleItem[]} items Items to track.\n * @return {ShuffleItem[]}\n */\n _mergeNewItems(items) {\n const children = Array.from(this.element.children);\n return sorter(this.items.concat(items), {\n by(element) {\n return children.indexOf(element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter((item) => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter((item) => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.options.sizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.options.sizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns)\n < this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns || 0), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * Emit an event from this instance.\n * @param {string} name Event name.\n * @param {Object} [data={}] Optional object data.\n */\n _dispatch(name, data = {}) {\n if (this.isDestroyed) {\n return;\n }\n\n data.shuffle = this;\n this.emit(name, data);\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {ShuffleItem[]} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n const itemPositions = this._getNextPositions(items);\n\n let count = 0;\n items.forEach((item, i) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = itemPositions[i];\n item.scale = ShuffleItem.Scale.VISIBLE;\n item.isHidden = false;\n\n // Clone the object so that the `before` object isn't modified when the\n // transition delay is added.\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Return an array of Point instances representing the future positions of\n * each item.\n * @param {ShuffleItem[]} items Array of sorted shuffle items.\n * @return {Point[]}\n * @private\n */\n _getNextPositions(items) {\n // If position data is going to be changed, add the item's size to the\n // transformer to allow for calculations.\n if (this.options.isCentered) {\n const itemsData = items.map((item, i) => {\n const itemSize = Shuffle.getSize(item.element, true);\n const point = this._getItemPosition(itemSize);\n return new Rect(point.x, point.y, itemSize.width, itemSize.height, i);\n });\n\n return this.getTransformedPositions(itemsData, this.containerWidth);\n }\n\n // If no transforms are going to happen, simply return an array of the\n // future points of each item.\n return items.map((item) => this._getItemPosition(Shuffle.getSize(item.element, true)));\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Mutate positions before they're applied.\n * @param {Rect[]} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Point[]}\n * @protected\n */\n getTransformedPositions(itemRects, containerWidth) {\n return getCenteredPositions(itemRects, containerWidth);\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {ShuffleItem[]} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.isHidden) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {ShuffleItem} item Item to get styles for. Should have updated\n * scale and point properties.\n * @param {Object} styleObject Extra styles that will be used in the transition.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @protected\n */\n getStylesForTransition(item, styleObject) {\n // Clone the object to avoid mutating the original.\n // eslint-disable-next-line prefer-object-spread\n const styles = Object.assign({}, styleObject);\n\n if (this.options.useTransforms) {\n const sign = this.options.isRTL ? '-' : '';\n const x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x;\n const y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y;\n styles.transform = `translate(${sign}${x}px, ${y}px) scale(${item.scale})`;\n } else {\n if (this.options.isRTL) {\n styles.right = item.point.x + 'px';\n } else {\n styles.left = item.point.x + 'px';\n }\n styles.top = item.point.y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {function} itemCallback Callback for the item.\n * @param {function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(opts.styles);\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatch(Shuffle.EventType.LAYOUT);\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Object[]} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map((obj) => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Object[]} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map((obj) => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(obj.styles);\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|string[]|function(Element):boolean} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {SortOptions} [sortOptions] A sort object which can sort the visible set\n */\n filter(category, sortOptions) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortOptions);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {SortOptions} [sortOptions] The options object to pass to `sorter`.\n */\n sort(sortOptions = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n const items = sorter(this._getFilteredItems(), sortOptions);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = sortOptions;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated.\n */\n update(isOnlyLayout = false) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Element[]} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map((el) => new ShuffleItem(el, this.options.isRTL));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Determine which items will go with the current filter.\n this._resetCols();\n\n const allItems = this._mergeNewItems(items);\n const sortedItems = sorter(allItems, this.lastSort);\n const allSortedItemsSet = this._filter(this.lastFilter, sortedItems);\n\n const isNewItem = (item) => items.includes(item);\n const applyHiddenState = (item) => {\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n };\n\n // Layout all items again so that new items get positions.\n // Synchonously apply positions.\n const itemPositions = this._getNextPositions(allSortedItemsSet.visible);\n allSortedItemsSet.visible.forEach((item, i) => {\n if (isNewItem(item)) {\n item.point = itemPositions[i];\n applyHiddenState(item);\n item.applyCss(this.getStylesForTransition(item, {}));\n }\n });\n\n allSortedItemsSet.hidden.forEach((item) => {\n if (isNewItem(item)) {\n applyHiddenState(item);\n }\n });\n\n // Cause layout so that the styles above are applied.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Add transition to each item.\n this.setItemTransitions(items);\n\n // Update the list of items.\n this.items = this._mergeNewItems(items);\n\n // Update layout/visibility of new and old items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout = true) {\n this.isEnabled = true;\n if (isUpdateLayout) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items.\n * @param {Element[]} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle instance.\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map((element) => this.getItemByElement(element))\n .filter((item) => !!item);\n\n const handleLayout = () => {\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter((item) => !oldItems.includes(item));\n this._updateItemCount();\n\n this.once(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or undefined if it's not found.\n */\n getItemByElement(element) {\n return this.items.find((item) => item.element === element);\n }\n\n /**\n * Dump the elements currently stored and reinitialize all child elements which\n * match the `itemSelector`.\n */\n resetItems() {\n // Remove refs to current items.\n this._disposeItems(this.items);\n this.isInitialized = false;\n\n // Find new items in the DOM.\n this.items = this._getItems();\n\n // Set initial styles on the new items.\n this._initItems(this.items);\n\n this.once(Shuffle.EventType.LAYOUT, () => {\n // Add transition to each item.\n this.setItemTransitions(this.items);\n this.isInitialized = true;\n });\n\n // Lay out all items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems(this.items);\n\n this.items.length = 0;\n this._transitions.length = 0;\n\n // Null DOM references\n this.options.sizer = null;\n this.element = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n this.isEnabled = false;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. The `offsetWidth` property.\n * - This value stays the same regardless of the elements transform property,\n * however, it does not return subpixel values.\n * 3. getComputedStyle()\n * - This works great Chrome, Firefox, Safari, but IE<=11 does not include\n * padding and border when box-sizing: border-box is set, requiring a feature\n * test and extra work to add the padding back for IE and other browsers which\n * follow the W3C spec here.\n *\n * @param {Element} element The element.\n * @param {boolean} [includeMargins=false] Whether to include margins.\n * @return {{width: number, height: number}} The width and height.\n */\n static getSize(element, includeMargins = false) {\n // Store the styles so that they can be used by others without asking for it again.\n const styles = window.getComputedStyle(element, null);\n let width = getNumberStyle(element, 'width', styles);\n let height = getNumberStyle(element, 'height', styles);\n\n if (includeMargins) {\n const marginLeft = getNumberStyle(element, 'marginLeft', styles);\n const marginRight = getNumberStyle(element, 'marginRight', styles);\n const marginTop = getNumberStyle(element, 'marginTop', styles);\n const marginBottom = getNumberStyle(element, 'marginBottom', styles);\n width += marginLeft + marginRight;\n height += marginTop + marginBottom;\n }\n\n return {\n width,\n height,\n };\n }\n\n /**\n * Change a property or execute a function which will not have a transition\n * @param {Element[]} elements DOM elements that won't be transitioned.\n * @param {function} callback A function which will be called while transition\n * is set to 0ms.\n * @private\n */\n static _skipTransitions(elements, callback) {\n const zero = '0ms';\n\n // Save current duration and delay.\n const data = elements.map((element) => {\n const { style } = element;\n const duration = style.transitionDuration;\n const delay = style.transitionDelay;\n\n // Set the duration to zero so it happens immediately\n style.transitionDuration = zero;\n style.transitionDelay = zero;\n\n return {\n duration,\n delay,\n };\n });\n\n callback();\n\n // Cause forced synchronous layout.\n elements[0].offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Put the duration back\n elements.forEach((element, i) => {\n element.style.transitionDuration = data[i].duration;\n element.style.transitionDelay = data[i].delay;\n });\n }\n}\n\nShuffle.ShuffleItem = ShuffleItem;\n\nShuffle.ALL_ITEMS = 'all';\nShuffle.FILTER_ATTRIBUTE_KEY = 'groups';\n\n/** @enum {string} */\nShuffle.EventType = {\n LAYOUT: 'shuffle:layout',\n REMOVED: 'shuffle:removed',\n};\n\n/** @enum {string} */\nShuffle.Classes = Classes;\n\n/** @enum {string} */\nShuffle.FilterMode = {\n ANY: 'any',\n ALL: 'all',\n};\n\n// Overrideable options\nShuffle.options = {\n // Initial filter group.\n group: Shuffle.ALL_ITEMS,\n\n // Transition/animation speed (milliseconds).\n speed: 250,\n\n // CSS easing function to use.\n easing: 'cubic-bezier(0.4, 0.0, 0.2, 1)',\n\n // e.g. '.picture-item'.\n itemSelector: '*',\n\n // Element or selector string. 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\ No newline at end of file diff --git a/docs/_includes/changelog.html b/docs/_includes/changelog.html index 05bdf73..1e0d1ee 100644 --- a/docs/_includes/changelog.html +++ b/docs/_includes/changelog.html @@ -1,6 +1,7 @@

Changelog

For a more detailed changelog, visit the latest releases on GitHub.

    +
  • v5.3.0 2021-03-23 - Add isRTL option.
  • v5.2.3 2019-08-29 - Add missing inherited methods from TinyEmitter to TypeScript definitions.
  • v5.2.2 2019-06-03 - Update TypeScript definitions.
  • v5.2.1 2018-12-01 - Change `index.d.ts` to use `export default Shuffle` (#214). Upgrade dev dependencies.
    • diff --git a/docs/css/shuffle-styles.css b/docs/css/shuffle-styles.css index 1bf4641..80d8367 100644 --- a/docs/css/shuffle-styles.css +++ b/docs/css/shuffle-styles.css @@ -1 +1 @@ -.picture-item{height:220px;margin-top:24px;margin-left:0}.picture-item img{display:block;width:100%}@supports ((-o-object-fit:cover) or (object-fit:cover)){.picture-item img{max-width:none;height:100%;-o-object-fit:cover;object-fit:cover}}.picture-item--h2{height:464px}.picture-item__inner{position:relative;height:100%;overflow:hidden;background:#ecf0f1}img.picture-item__blur{display:none}.picture-item__details{display:flex;align-items:baseline;justify-content:space-between;width:100%;padding:1em}.picture-item__description{width:100%;padding:0 2em 1em 1em;margin:0}.picture-item__title{flex-shrink:0;margin-right:4px}.picture-item__tags{flex-shrink:1;text-align:right;margin:0}@media screen and (min-width:768px){.picture-item--overlay .picture-item__details{position:absolute;bottom:0;left:0;width:100%;background-color:rgba(0,0,0,.6);color:#fff;overflow:hidden}.picture-item--overlay .picture-item__description{display:none}@supports ((-webkit-filter:blur(1px)) or (filter:blur(1px))) and ((-webkit-clip-path:inset(0 0 0 0)) or (clip-path:inset(0 0 0 0))){.picture-item--overlay .picture-item__blur{position:absolute;z-index:1;top:0;left:0;display:block;-webkit-filter:blur(7px);filter:blur(7px);-webkit-clip-path:inset(170px 0 0 0);clip-path:inset(170px 0 0 0)}.picture-item--overlay .picture-item__details{background:none}.picture-item--overlay .picture-item__tags,.picture-item--overlay .picture-item__title{position:relative;z-index:2}}}.my-shuffle-container{position:relative;overflow:hidden}.my-sizer-element{position:absolute;opacity:0;visibility:hidden}.shuffle--animatein{overflow:visible}.shuffle--animatein .picture-item__inner{opacity:0;transform:translateY(220px)}.shuffle--animatein .picture-item__inner--transition{transition:all .6s ease}.shuffle--animatein .picture-item.in .picture-item__inner{opacity:1;transform:translate(0)}@media screen and (max-width:767px){.picture-item{height:auto;margin-top:20px}.picture-item__description,.picture-item__details{font-size:.875em;padding:.625em}.picture-item__description{padding-right:.875em;padding-bottom:1.25em}.picture-item--h2{height:auto}} \ No newline at end of file +.picture-item{height:220px;margin-top:24px;margin-left:0}.picture-item img{display:block;width:100%}@supports ((-o-object-fit: cover) or (object-fit: cover)){.picture-item img{max-width:none;height:100%;-o-object-fit:cover;object-fit:cover}}.picture-item--h2{height:464px}.picture-item__inner{position:relative;height:100%;overflow:hidden;background:#ecf0f1}img.picture-item__blur{display:none}.picture-item__details{display:flex;align-items:baseline;justify-content:space-between;width:100%;padding:1em}.picture-item__description{width:100%;padding:0 2em 1em 1em;margin:0}.picture-item__title{flex-shrink:0;margin-right:4px}.picture-item__tags{flex-shrink:1;text-align:right;margin:0}@media screen and (min-width:768px){.picture-item--overlay .picture-item__details{position:absolute;bottom:0;left:0;width:100%;background-color:rgba(0,0,0,.6);color:#fff;overflow:hidden}.picture-item--overlay .picture-item__description{display:none}@supports (filter:blur(1px)) and ((-webkit-clip-path: inset(0 0 0 0)) or (clip-path: inset(0 0 0 0))){.picture-item--overlay .picture-item__blur{position:absolute;z-index:1;top:0;left:0;display:block;filter:blur(7px);-webkit-clip-path:inset(170px 0 0 0);clip-path:inset(170px 0 0 0)}.picture-item--overlay .picture-item__details{background:none}.picture-item--overlay .picture-item__tags,.picture-item--overlay 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(min-width:1392px){.shape--triangle .shape__space{padding-top:19px;height:0;width:0;border-width:0 142px 246px}}.search-section{margin-top:1em;margin-bottom:1em}.question{float:none;margin:2em 0;overflow:hidden;transition:.2s ease-out}.question--collapsed{height:0!important;margin:0;border-width:0}.question--collapsed+.question{margin-top:0}.question--unanswered{padding-top:1.25em;border-top:2px solid #2ecc71}.question__title{margin-top:0}.question__answer{padding-bottom:1px;margin-bottom:0} \ No newline at end of file diff --git a/docs/dist/shuffle.js b/docs/dist/shuffle.js index bfe6551..d429463 100644 --- a/docs/dist/shuffle.js +++ b/docs/dist/shuffle.js @@ -1,7 +1,7 @@ (function (global, factory) { typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : typeof define === 'function' && define.amd ? define(factory) : - (global = global || self, global.Shuffle = factory()); + (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Shuffle = factory()); }(this, (function () { 'use strict'; function _classCallCheck(instance, Constructor) { @@ -63,7 +63,7 @@ if (typeof Proxy === "function") return true; try { - Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); + Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; @@ -87,11 +87,13 @@ } function _createSuper(Derived) { - return function () { + var hasNativeReflectConstruct = _isNativeReflectConstruct(); + + return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; - if (_isNativeReflectConstruct()) { + if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); @@ -366,15 +368,20 @@ HIDDEN: 'shuffle-item--hidden' }; - var id = 0; + var id$1 = 0; var ShuffleItem = /*#__PURE__*/function () { - function ShuffleItem(element) { + function ShuffleItem(element, isRTL) { _classCallCheck(this, ShuffleItem); - id += 1; - this.id = id; + id$1 += 1; + this.id = id$1; this.element = element; + /** + * Set correct direction of item + */ + + this.isRTL = isRTL; /** * Used to separate items for layout and shrink. */ @@ -411,6 +418,7 @@ value: function init() { this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]); this.applyCss(ShuffleItem.Css.INITIAL); + this.applyCss(this.isRTL ? ShuffleItem.Css.DIRECTION.rtl : ShuffleItem.Css.DIRECTION.ltr); this.scale = ShuffleItem.Scale.VISIBLE; this.point = new Point(); } @@ -457,10 +465,17 @@ INITIAL: { position: 'absolute', top: 0, - left: 0, visibility: 'visible', willChange: 'transform' }, + DIRECTION: { + ltr: { + left: 0 + }, + rtl: { + right: 0 + } + }, VISIBLE: { before: { opacity: 1, @@ -898,7 +913,7 @@ } // Used for unique instance variables - var id$1 = 0; + var id = 0; var Shuffle = /*#__PURE__*/function (_TinyEmitter) { _inherits(Shuffle, _TinyEmitter); @@ -945,8 +960,8 @@ } _this.element = el; - _this.id = 'shuffle_' + id$1; - id$1 += 1; + _this.id = 'shuffle_' + id; + id += 1; _this._init(); @@ -1246,7 +1261,7 @@ return Array.from(this.element.children).filter(function (el) { return matchesSelector(el, _this3.options.itemSelector); }).map(function (el) { - return new ShuffleItem(el); + return new ShuffleItem(el, _this3.options.isRTL); }); } /** @@ -1611,11 +1626,17 @@ var styles = Object.assign({}, styleObject); if (this.options.useTransforms) { + var sign = this.options.isRTL ? '-' : ''; var x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x; var y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y; - styles.transform = "translate(".concat(x, "px, ").concat(y, "px) scale(").concat(item.scale, ")"); + styles.transform = "translate(".concat(sign).concat(x, "px, ").concat(y, "px) scale(").concat(item.scale, ")"); } else { - styles.left = item.point.x + 'px'; + if (this.options.isRTL) { + styles.right = item.point.x + 'px'; + } else { + styles.left = item.point.x + 'px'; + } + styles.top = item.point.y + 'px'; } @@ -1849,7 +1870,7 @@ var _this9 = this; var items = arrayUnique(newItems).map(function (el) { - return new ShuffleItem(el); + return new ShuffleItem(el, _this9.options.isRTL); }); // Add classes and set initial positions. this._initItems(items); // Determine which items will go with the current filter. @@ -2198,6 +2219,8 @@ filterMode: Shuffle.FilterMode.ANY, // Attempt to center grid items in each row. isCentered: false, + // Attempt to align grid items to right. + isRTL: false, // Whether to round pixel values used in translate(x, y). This usually avoids // blurriness. roundTransforms: true diff --git a/docs/dist/shuffle.js.map b/docs/dist/shuffle.js.map index 38ab889..1ded37c 100644 --- a/docs/dist/shuffle.js.map +++ b/docs/dist/shuffle.js.map @@ -1 +1 @@ -{"version":3,"file":"shuffle.js","sources":["../node_modules/tiny-emitter/index.js","../node_modules/matches-selector/index.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/point.js","../src/rect.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/array-min.js","../src/layout.js","../src/hyphenate.js","../src/shuffle.js"],"sourcesContent":["function E () {\n // Keep this empty so it's easier to inherit from\n // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)\n}\n\nE.prototype = {\n on: function (name, callback, ctx) {\n var e = this.e || (this.e = {});\n\n (e[name] || (e[name] = [])).push({\n fn: callback,\n ctx: ctx\n });\n\n return this;\n },\n\n once: function (name, callback, ctx) {\n var self = this;\n function listener () {\n self.off(name, listener);\n callback.apply(ctx, arguments);\n };\n\n listener._ = callback\n return this.on(name, listener, ctx);\n },\n\n emit: function (name) {\n var data = [].slice.call(arguments, 1);\n var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n var i = 0;\n var len = evtArr.length;\n\n for (i; i < len; i++) {\n evtArr[i].fn.apply(evtArr[i].ctx, data);\n }\n\n return this;\n },\n\n off: function (name, callback) {\n var e = this.e || (this.e = {});\n var evts = e[name];\n var liveEvents = [];\n\n if (evts && callback) {\n for (var i = 0, len = evts.length; i < len; i++) {\n if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n liveEvents.push(evts[i]);\n }\n }\n\n // Remove event from queue to prevent memory leak\n // Suggested by https://github.com/lazd\n // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n (liveEvents.length)\n ? e[name] = liveEvents\n : delete e[name];\n\n return this;\n }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n","'use strict';\n\nvar proto = typeof Element !== 'undefined' ? Element.prototype : {};\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (!el || el.nodeType !== 1) return false;\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\n\nclass Point {\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default class Rect {\n /**\n * Class for representing rectangular regions.\n * https://github.com/google/closure-library/blob/master/closure/goog/math/rect.js\n * @param {number} x Left.\n * @param {number} y Top.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} id Identifier\n * @constructor\n */\n constructor(x, y, w, h, id) {\n this.id = id;\n\n /** @type {number} */\n this.left = x;\n\n /** @type {number} */\n this.top = y;\n\n /** @type {number} */\n this.width = w;\n\n /** @type {number} */\n this.height = h;\n }\n\n /**\n * Returns whether two rectangles intersect.\n * @param {Rect} a A Rectangle.\n * @param {Rect} b A Rectangle.\n * @return {boolean} Whether a and b intersect.\n */\n static intersects(a, b) {\n return (\n a.left < b.left + b.width && b.left < a.left + a.width\n && a.top < b.top + b.height && b.top < a.top + a.height);\n }\n}\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element) {\n id += 1;\n this.id = id;\n this.element = element;\n\n /**\n * Used to separate items for layout and shrink.\n */\n this.isVisible = true;\n\n /**\n * Used to determine if a transition will happen. By the time the _layout\n * and _shrink methods get the ShuffleItem instances, the `isVisible` value\n * has already been changed by the separation methods, so this property is\n * needed to know if the item was visible/hidden before the shrink/layout.\n */\n this.isHidden = false;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n this.element.removeAttribute('aria-hidden');\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n this.element.setAttribute('aria-hidden', true);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n left: 0,\n visibility: 'visible',\n willChange: 'transform',\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {\n transitionDelay: '',\n },\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n transitionDelay: '',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","let value = null;\nexport default () => {\n if (value !== null) {\n return value;\n }\n\n const element = document.body || document.documentElement;\n const e = document.createElement('div');\n e.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;';\n element.appendChild(e);\n\n value = window.getComputedStyle(e, null).width === '10px';\n\n element.removeChild(e);\n\n return value;\n};\n","import getNumber from './get-number';\nimport testComputedSize from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(\n element, style,\n styles = window.getComputedStyle(element, null),\n) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!testComputedSize() && style === 'width') {\n value += getNumber(styles.paddingLeft)\n + getNumber(styles.paddingRight)\n + getNumber(styles.borderLeftWidth)\n + getNumber(styles.borderRightWidth);\n } else if (!testComputedSize() && style === 'height') {\n value += getNumber(styles.paddingTop)\n + getNumber(styles.paddingBottom)\n + getNumber(styles.borderTopWidth)\n + getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // Custom sort function\n compare: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n/**\n * You can return `undefined` from the `by` function to revert to DOM order.\n * @param {Array} arr Array to sort.\n * @param {SortOptions} options Sorting options.\n * @return {Array}\n */\nexport default function sorter(arr, options) {\n // eslint-disable-next-line prefer-object-spread\n const opts = Object.assign({}, defaults, options);\n const original = Array.from(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n } else if (typeof opts.compare === 'function') {\n arr.sort(opts.compare);\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport Rect from './rect';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 10]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 10]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({\n itemSize, positions, gridSize, total, threshold, buffer,\n}) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]);\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n\n/**\n * This method attempts to center items. This method could potentially be slow\n * with a large number of items because it must place items, then check every\n * previous item to ensure there is no overlap.\n * @param {Array.} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Array.}\n */\nexport function getCenteredPositions(itemRects, containerWidth) {\n const rowMap = {};\n\n // Populate rows by their offset because items could jump between rows like:\n // a c\n // bbb\n itemRects.forEach((itemRect) => {\n if (rowMap[itemRect.top]) {\n // Push the point to the last row array.\n rowMap[itemRect.top].push(itemRect);\n } else {\n // Start of a new row.\n rowMap[itemRect.top] = [itemRect];\n }\n });\n\n // For each row, find the end of the last item, then calculate\n // the remaining space by dividing it by 2. Then add that\n // offset to the x position of each point.\n let rects = [];\n const rows = [];\n const centeredRows = [];\n Object.keys(rowMap).forEach((key) => {\n const itemRects = rowMap[key];\n rows.push(itemRects);\n const lastItem = itemRects[itemRects.length - 1];\n const end = lastItem.left + lastItem.width;\n const offset = Math.round((containerWidth - end) / 2);\n\n let finalRects = itemRects;\n let canMove = false;\n if (offset > 0) {\n const newRects = [];\n canMove = itemRects.every((r) => {\n const newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id);\n\n // Check all current rects to make sure none overlap.\n const noOverlap = !rects.some((r) => Rect.intersects(newRect, r));\n\n newRects.push(newRect);\n return noOverlap;\n });\n\n // If none of the rectangles overlapped, the whole group can be centered.\n if (canMove) {\n finalRects = newRects;\n }\n }\n\n // If the items are not going to be offset, ensure that the original\n // placement for this row will not overlap previous rows (row-spanning\n // elements could be in the way).\n if (!canMove) {\n let intersectingRect;\n const hasOverlap = itemRects.some((itemRect) => rects.some((r) => {\n const intersects = Rect.intersects(itemRect, r);\n if (intersects) {\n intersectingRect = r;\n }\n return intersects;\n }));\n\n // If there is any overlap, replace the overlapping row with the original.\n if (hasOverlap) {\n const rowIndex = centeredRows.findIndex((items) => items.includes(intersectingRect));\n centeredRows.splice(rowIndex, 1, rows[rowIndex]);\n }\n }\n\n rects = rects.concat(finalRects);\n centeredRows.push(finalRects);\n });\n\n // Reduce array of arrays to a single array of points.\n // https://stackoverflow.com/a/10865042/373422\n // Then reset sort back to how the items were passed to this method.\n // Remove the wrapper object with index, map to a Point.\n return [].concat.apply([], centeredRows) // eslint-disable-line prefer-spread\n .sort((a, b) => (a.id - b.id))\n .map((itemRect) => new Point(itemRect.left, itemRect.top));\n}\n","/**\n * Hyphenates a javascript style string to a css one. For example:\n * MozBoxSizing -> -moz-box-sizing.\n * @param {string} str The string to hyphenate.\n * @return {string} The hyphenated string.\n */\nexport default function hyphenate(str) {\n return str.replace(/([A-Z])/g, (str, m1) => `-${m1.toLowerCase()}`);\n}\n","import TinyEmitter from 'tiny-emitter';\nimport matches from 'matches-selector';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\n\nimport Point from './point';\nimport Rect from './rect';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport {\n getItemPosition,\n getColumnSpan,\n getAvailablePositions,\n getShortColumn,\n getCenteredPositions,\n} from './layout';\nimport arrayMax from './array-max';\nimport hyphenate from './hyphenate';\n\nfunction arrayUnique(x) {\n return Array.from(new Set(x));\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle extends TinyEmitter {\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n super();\n // eslint-disable-next-line prefer-object-spread\n this.options = Object.assign({}, Shuffle.options, options);\n\n // Allow misspelling of delimiter since that's how it used to be.\n // Remove in v6.\n if (this.options.delimeter) {\n this.options.delimiter = this.options.delimeter;\n }\n\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems(this.items);\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // If the page has not already emitted the `load` event, call layout on load.\n // This avoids layout issues caused by images and fonts loading after the\n // instance has been initialized.\n if (document.readyState !== 'complete') {\n const layout = this.layout.bind(this);\n window.addEventListener('load', function onLoad() {\n window.removeEventListener('load', onLoad);\n layout();\n });\n }\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this.setItemTransitions(this.items);\n this.element.style.transition = `height ${this.options.speed}ms ${this.options.easing}`;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle\n ? this.options.throttle(resizeFunction, this.options.throttleTime)\n : resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n }\n\n // Check for an element\n if (option && option.nodeType && option.nodeType === 1) {\n return option;\n }\n\n // Check for jQuery object\n if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string|string[]|function(Element):boolean} [category] Category to\n * filter by. If it's given, the last category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|string[]|function(Element):boolean} category Category or function to filter by.\n * @param {ShuffleItem[]} items A collection of items to filter.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|string[]|function():boolean} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimiter\n ? attr.split(this.options.delimiter)\n : JSON.parse(attr);\n\n function testCategory(category) {\n return keys.includes(category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return keys.includes(category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {ShuffleItem[]} items Set to initialize.\n * @private\n */\n _initItems(items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @param {ShuffleItem[]} items Set to dispose.\n * @private\n */\n _disposeItems(items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of a new Shuffle instance.\n * @param {ShuffleItem[]} items Shuffle items to set transitions on.\n * @protected\n */\n setItemTransitions(items) {\n const { speed, easing } = this.options;\n const positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left'];\n\n // Allow users to transtion other properties if they exist in the `before`\n // css mapping of the shuffle item.\n const cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map((k) => hyphenate(k));\n const properties = positionProps.concat(cssProps).join();\n\n items.forEach((item) => {\n item.element.style.transitionDuration = speed + 'ms';\n item.element.style.transitionTimingFunction = easing;\n item.element.style.transitionProperty = properties;\n });\n }\n\n _getItems() {\n return Array.from(this.element.children)\n .filter((el) => matches(el, this.options.itemSelector))\n .map((el) => new ShuffleItem(el));\n }\n\n /**\n * Combine the current items array with a new one and sort it by DOM order.\n * @param {ShuffleItem[]} items Items to track.\n * @return {ShuffleItem[]}\n */\n _mergeNewItems(items) {\n const children = Array.from(this.element.children);\n return sorter(this.items.concat(items), {\n by(element) {\n return children.indexOf(element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter((item) => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter((item) => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.options.sizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.options.sizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns)\n < this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns || 0), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * Emit an event from this instance.\n * @param {string} name Event name.\n * @param {Object} [data={}] Optional object data.\n */\n _dispatch(name, data = {}) {\n if (this.isDestroyed) {\n return;\n }\n\n data.shuffle = this;\n this.emit(name, data);\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {ShuffleItem[]} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n const itemPositions = this._getNextPositions(items);\n\n let count = 0;\n items.forEach((item, i) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = itemPositions[i];\n item.scale = ShuffleItem.Scale.VISIBLE;\n item.isHidden = false;\n\n // Clone the object so that the `before` object isn't modified when the\n // transition delay is added.\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Return an array of Point instances representing the future positions of\n * each item.\n * @param {ShuffleItem[]} items Array of sorted shuffle items.\n * @return {Point[]}\n * @private\n */\n _getNextPositions(items) {\n // If position data is going to be changed, add the item's size to the\n // transformer to allow for calculations.\n if (this.options.isCentered) {\n const itemsData = items.map((item, i) => {\n const itemSize = Shuffle.getSize(item.element, true);\n const point = this._getItemPosition(itemSize);\n return new Rect(point.x, point.y, itemSize.width, itemSize.height, i);\n });\n\n return this.getTransformedPositions(itemsData, this.containerWidth);\n }\n\n // If no transforms are going to happen, simply return an array of the\n // future points of each item.\n return items.map((item) => this._getItemPosition(Shuffle.getSize(item.element, true)));\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Mutate positions before they're applied.\n * @param {Rect[]} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Point[]}\n * @protected\n */\n getTransformedPositions(itemRects, containerWidth) {\n return getCenteredPositions(itemRects, containerWidth);\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {ShuffleItem[]} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.isHidden) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {ShuffleItem} item Item to get styles for. Should have updated\n * scale and point properties.\n * @param {Object} styleObject Extra styles that will be used in the transition.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @protected\n */\n getStylesForTransition(item, styleObject) {\n // Clone the object to avoid mutating the original.\n // eslint-disable-next-line prefer-object-spread\n const styles = Object.assign({}, styleObject);\n\n if (this.options.useTransforms) {\n const x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x;\n const y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y;\n styles.transform = `translate(${x}px, ${y}px) scale(${item.scale})`;\n } else {\n styles.left = item.point.x + 'px';\n styles.top = item.point.y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {function} itemCallback Callback for the item.\n * @param {function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(opts.styles);\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatch(Shuffle.EventType.LAYOUT);\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Object[]} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map((obj) => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Object[]} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map((obj) => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(obj.styles);\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|string[]|function(Element):boolean} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {SortOptions} [sortOptions] A sort object which can sort the visible set\n */\n filter(category, sortOptions) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortOptions);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {SortOptions} [sortOptions] The options object to pass to `sorter`.\n */\n sort(sortOptions = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n const items = sorter(this._getFilteredItems(), sortOptions);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = sortOptions;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated.\n */\n update(isOnlyLayout = false) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Element[]} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map((el) => new ShuffleItem(el));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Determine which items will go with the current filter.\n this._resetCols();\n\n const allItems = this._mergeNewItems(items);\n const sortedItems = sorter(allItems, this.lastSort);\n const allSortedItemsSet = this._filter(this.lastFilter, sortedItems);\n\n const isNewItem = (item) => items.includes(item);\n const applyHiddenState = (item) => {\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n };\n\n // Layout all items again so that new items get positions.\n // Synchonously apply positions.\n const itemPositions = this._getNextPositions(allSortedItemsSet.visible);\n allSortedItemsSet.visible.forEach((item, i) => {\n if (isNewItem(item)) {\n item.point = itemPositions[i];\n applyHiddenState(item);\n item.applyCss(this.getStylesForTransition(item, {}));\n }\n });\n\n allSortedItemsSet.hidden.forEach((item) => {\n if (isNewItem(item)) {\n applyHiddenState(item);\n }\n });\n\n // Cause layout so that the styles above are applied.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Add transition to each item.\n this.setItemTransitions(items);\n\n // Update the list of items.\n this.items = this._mergeNewItems(items);\n\n // Update layout/visibility of new and old items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout = true) {\n this.isEnabled = true;\n if (isUpdateLayout) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items.\n * @param {Element[]} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle instance.\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map((element) => this.getItemByElement(element))\n .filter((item) => !!item);\n\n const handleLayout = () => {\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter((item) => !oldItems.includes(item));\n this._updateItemCount();\n\n this.once(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or undefined if it's not found.\n */\n getItemByElement(element) {\n return this.items.find((item) => item.element === element);\n }\n\n /**\n * Dump the elements currently stored and reinitialize all child elements which\n * match the `itemSelector`.\n */\n resetItems() {\n // Remove refs to current items.\n this._disposeItems(this.items);\n this.isInitialized = false;\n\n // Find new items in the DOM.\n this.items = this._getItems();\n\n // Set initial styles on the new items.\n this._initItems(this.items);\n\n this.once(Shuffle.EventType.LAYOUT, () => {\n // Add transition to each item.\n this.setItemTransitions(this.items);\n this.isInitialized = true;\n });\n\n // Lay out all items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems(this.items);\n\n this.items.length = 0;\n this._transitions.length = 0;\n\n // Null DOM references\n this.options.sizer = null;\n this.element = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n this.isEnabled = false;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. 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listener () {\n self.off(name, listener);\n callback.apply(ctx, arguments);\n };\n\n listener._ = callback\n return this.on(name, listener, ctx);\n },\n\n emit: function (name) {\n var data = [].slice.call(arguments, 1);\n var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n var i = 0;\n var len = evtArr.length;\n\n for (i; i < len; i++) {\n evtArr[i].fn.apply(evtArr[i].ctx, data);\n }\n\n return this;\n },\n\n off: function (name, callback) {\n var e = this.e || (this.e = {});\n var evts = e[name];\n var liveEvents = [];\n\n if (evts && callback) {\n for (var i = 0, len = evts.length; i < len; i++) {\n if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n liveEvents.push(evts[i]);\n }\n }\n\n // Remove event from queue to prevent memory leak\n // Suggested by https://github.com/lazd\n // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n (liveEvents.length)\n ? e[name] = liveEvents\n : delete e[name];\n\n return this;\n }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n","'use strict';\n\nvar proto = typeof Element !== 'undefined' ? Element.prototype : {};\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (!el || el.nodeType !== 1) return false;\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\n\nclass Point {\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default class Rect {\n /**\n * Class for representing rectangular regions.\n * https://github.com/google/closure-library/blob/master/closure/goog/math/rect.js\n * @param {number} x Left.\n * @param {number} y Top.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} id Identifier\n * @constructor\n */\n constructor(x, y, w, h, id) {\n this.id = id;\n\n /** @type {number} */\n this.left = x;\n\n /** @type {number} */\n this.top = y;\n\n /** @type {number} */\n this.width = w;\n\n /** @type {number} */\n this.height = h;\n }\n\n /**\n * Returns whether two rectangles intersect.\n * @param {Rect} a A Rectangle.\n * @param {Rect} b A Rectangle.\n * @return {boolean} Whether a and b intersect.\n */\n static intersects(a, b) {\n return (\n a.left < b.left + b.width && b.left < a.left + a.width\n && a.top < b.top + b.height && b.top < a.top + a.height);\n }\n}\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element, isRTL) {\n id += 1;\n this.id = id;\n this.element = element;\n\n /**\n * Set correct direction of item\n */\n this.isRTL = isRTL;\n\n /**\n * Used to separate items for layout and shrink.\n */\n this.isVisible = true;\n\n /**\n * Used to determine if a transition will happen. By the time the _layout\n * and _shrink methods get the ShuffleItem instances, the `isVisible` value\n * has already been changed by the separation methods, so this property is\n * needed to know if the item was visible/hidden before the shrink/layout.\n */\n this.isHidden = false;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n this.element.removeAttribute('aria-hidden');\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n this.element.setAttribute('aria-hidden', true);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.applyCss(this.isRTL ? ShuffleItem.Css.DIRECTION.rtl : ShuffleItem.Css.DIRECTION.ltr);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n visibility: 'visible',\n willChange: 'transform',\n },\n DIRECTION: {\n ltr: {\n left: 0,\n },\n rtl: {\n right: 0,\n },\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {\n transitionDelay: '',\n },\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n transitionDelay: '',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","let value = null;\nexport default () => {\n if (value !== null) {\n return value;\n }\n\n const element = document.body || document.documentElement;\n const e = document.createElement('div');\n e.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;';\n element.appendChild(e);\n\n value = window.getComputedStyle(e, null).width === '10px';\n\n element.removeChild(e);\n\n return value;\n};\n","import getNumber from './get-number';\nimport testComputedSize from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(\n element, style,\n styles = window.getComputedStyle(element, null),\n) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!testComputedSize() && style === 'width') {\n value += getNumber(styles.paddingLeft)\n + getNumber(styles.paddingRight)\n + getNumber(styles.borderLeftWidth)\n + getNumber(styles.borderRightWidth);\n } else if (!testComputedSize() && style === 'height') {\n value += getNumber(styles.paddingTop)\n + getNumber(styles.paddingBottom)\n + getNumber(styles.borderTopWidth)\n + getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // Custom sort function\n compare: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n/**\n * You can return `undefined` from the `by` function to revert to DOM order.\n * @param {Array} arr Array to sort.\n * @param {SortOptions} options Sorting options.\n * @return {Array}\n */\nexport default function sorter(arr, options) {\n // eslint-disable-next-line prefer-object-spread\n const opts = Object.assign({}, defaults, options);\n const original = Array.from(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n } else if (typeof opts.compare === 'function') {\n arr.sort(opts.compare);\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport Rect from './rect';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 10]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 10]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({\n itemSize, positions, gridSize, total, threshold, buffer,\n}) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]);\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n\n/**\n * This method attempts to center items. This method could potentially be slow\n * with a large number of items because it must place items, then check every\n * previous item to ensure there is no overlap.\n * @param {Array.} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Array.}\n */\nexport function getCenteredPositions(itemRects, containerWidth) {\n const rowMap = {};\n\n // Populate rows by their offset because items could jump between rows like:\n // a c\n // bbb\n itemRects.forEach((itemRect) => {\n if (rowMap[itemRect.top]) {\n // Push the point to the last row array.\n rowMap[itemRect.top].push(itemRect);\n } else {\n // Start of a new row.\n rowMap[itemRect.top] = [itemRect];\n }\n });\n\n // For each row, find the end of the last item, then calculate\n // the remaining space by dividing it by 2. Then add that\n // offset to the x position of each point.\n let rects = [];\n const rows = [];\n const centeredRows = [];\n Object.keys(rowMap).forEach((key) => {\n const itemRects = rowMap[key];\n rows.push(itemRects);\n const lastItem = itemRects[itemRects.length - 1];\n const end = lastItem.left + lastItem.width;\n const offset = Math.round((containerWidth - end) / 2);\n\n let finalRects = itemRects;\n let canMove = false;\n if (offset > 0) {\n const newRects = [];\n canMove = itemRects.every((r) => {\n const newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id);\n\n // Check all current rects to make sure none overlap.\n const noOverlap = !rects.some((r) => Rect.intersects(newRect, r));\n\n newRects.push(newRect);\n return noOverlap;\n });\n\n // If none of the rectangles overlapped, the whole group can be centered.\n if (canMove) {\n finalRects = newRects;\n }\n }\n\n // If the items are not going to be offset, ensure that the original\n // placement for this row will not overlap previous rows (row-spanning\n // elements could be in the way).\n if (!canMove) {\n let intersectingRect;\n const hasOverlap = itemRects.some((itemRect) => rects.some((r) => {\n const intersects = Rect.intersects(itemRect, r);\n if (intersects) {\n intersectingRect = r;\n }\n return intersects;\n }));\n\n // If there is any overlap, replace the overlapping row with the original.\n if (hasOverlap) {\n const rowIndex = centeredRows.findIndex((items) => items.includes(intersectingRect));\n centeredRows.splice(rowIndex, 1, rows[rowIndex]);\n }\n }\n\n rects = rects.concat(finalRects);\n centeredRows.push(finalRects);\n });\n\n // Reduce array of arrays to a single array of points.\n // https://stackoverflow.com/a/10865042/373422\n // Then reset sort back to how the items were passed to this method.\n // Remove the wrapper object with index, map to a Point.\n return [].concat.apply([], centeredRows) // eslint-disable-line prefer-spread\n .sort((a, b) => (a.id - b.id))\n .map((itemRect) => new Point(itemRect.left, itemRect.top));\n}\n","/**\n * Hyphenates a javascript style string to a css one. For example:\n * MozBoxSizing -> -moz-box-sizing.\n * @param {string} str The string to hyphenate.\n * @return {string} The hyphenated string.\n */\nexport default function hyphenate(str) {\n return str.replace(/([A-Z])/g, (str, m1) => `-${m1.toLowerCase()}`);\n}\n","import TinyEmitter from 'tiny-emitter';\nimport matches from 'matches-selector';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\n\nimport Point from './point';\nimport Rect from './rect';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport {\n getItemPosition,\n getColumnSpan,\n getAvailablePositions,\n getShortColumn,\n getCenteredPositions,\n} from './layout';\nimport arrayMax from './array-max';\nimport hyphenate from './hyphenate';\n\nfunction arrayUnique(x) {\n return Array.from(new Set(x));\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle extends TinyEmitter {\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n super();\n // eslint-disable-next-line prefer-object-spread\n this.options = Object.assign({}, Shuffle.options, options);\n\n // Allow misspelling of delimiter since that's how it used to be.\n // Remove in v6.\n if (this.options.delimeter) {\n this.options.delimiter = this.options.delimeter;\n }\n\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems(this.items);\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // If the page has not already emitted the `load` event, call layout on load.\n // This avoids layout issues caused by images and fonts loading after the\n // instance has been initialized.\n if (document.readyState !== 'complete') {\n const layout = this.layout.bind(this);\n window.addEventListener('load', function onLoad() {\n window.removeEventListener('load', onLoad);\n layout();\n });\n }\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this.setItemTransitions(this.items);\n this.element.style.transition = `height ${this.options.speed}ms ${this.options.easing}`;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle\n ? this.options.throttle(resizeFunction, this.options.throttleTime)\n : resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n }\n\n // Check for an element\n if (option && option.nodeType && option.nodeType === 1) {\n return option;\n }\n\n // Check for jQuery object\n if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string|string[]|function(Element):boolean} [category] Category to\n * filter by. If it's given, the last category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|string[]|function(Element):boolean} category Category or function to filter by.\n * @param {ShuffleItem[]} items A collection of items to filter.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|string[]|function():boolean} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimiter\n ? attr.split(this.options.delimiter)\n : JSON.parse(attr);\n\n function testCategory(category) {\n return keys.includes(category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return keys.includes(category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {ShuffleItem[]} items Set to initialize.\n * @private\n */\n _initItems(items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @param {ShuffleItem[]} items Set to dispose.\n * @private\n */\n _disposeItems(items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of a new Shuffle instance.\n * @param {ShuffleItem[]} items Shuffle items to set transitions on.\n * @protected\n */\n setItemTransitions(items) {\n const { speed, easing } = this.options;\n const positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left'];\n\n // Allow users to transtion other properties if they exist in the `before`\n // css mapping of the shuffle item.\n const cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map((k) => hyphenate(k));\n const properties = positionProps.concat(cssProps).join();\n\n items.forEach((item) => {\n item.element.style.transitionDuration = speed + 'ms';\n item.element.style.transitionTimingFunction = easing;\n item.element.style.transitionProperty = properties;\n });\n }\n\n _getItems() {\n return Array.from(this.element.children)\n .filter((el) => matches(el, this.options.itemSelector))\n .map((el) => new ShuffleItem(el, this.options.isRTL));\n }\n\n /**\n * Combine the current items array with a new one and sort it by DOM order.\n * @param {ShuffleItem[]} items Items to track.\n * @return {ShuffleItem[]}\n */\n _mergeNewItems(items) {\n const children = Array.from(this.element.children);\n return sorter(this.items.concat(items), {\n by(element) {\n return children.indexOf(element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter((item) => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter((item) => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.options.sizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.options.sizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns)\n < this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns || 0), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * Emit an event from this instance.\n * @param {string} name Event name.\n * @param {Object} [data={}] Optional object data.\n */\n _dispatch(name, data = {}) {\n if (this.isDestroyed) {\n return;\n }\n\n data.shuffle = this;\n this.emit(name, data);\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {ShuffleItem[]} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n const itemPositions = this._getNextPositions(items);\n\n let count = 0;\n items.forEach((item, i) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = itemPositions[i];\n item.scale = ShuffleItem.Scale.VISIBLE;\n item.isHidden = false;\n\n // Clone the object so that the `before` object isn't modified when the\n // transition delay is added.\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Return an array of Point instances representing the future positions of\n * each item.\n * @param {ShuffleItem[]} items Array of sorted shuffle items.\n * @return {Point[]}\n * @private\n */\n _getNextPositions(items) {\n // If position data is going to be changed, add the item's size to the\n // transformer to allow for calculations.\n if (this.options.isCentered) {\n const itemsData = items.map((item, i) => {\n const itemSize = Shuffle.getSize(item.element, true);\n const point = this._getItemPosition(itemSize);\n return new Rect(point.x, point.y, itemSize.width, itemSize.height, i);\n });\n\n return this.getTransformedPositions(itemsData, this.containerWidth);\n }\n\n // If no transforms are going to happen, simply return an array of the\n // future points of each item.\n return items.map((item) => this._getItemPosition(Shuffle.getSize(item.element, true)));\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Mutate positions before they're applied.\n * @param {Rect[]} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Point[]}\n * @protected\n */\n getTransformedPositions(itemRects, containerWidth) {\n return getCenteredPositions(itemRects, containerWidth);\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {ShuffleItem[]} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.isHidden) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {ShuffleItem} item Item to get styles for. Should have updated\n * scale and point properties.\n * @param {Object} styleObject Extra styles that will be used in the transition.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @protected\n */\n getStylesForTransition(item, styleObject) {\n // Clone the object to avoid mutating the original.\n // eslint-disable-next-line prefer-object-spread\n const styles = Object.assign({}, styleObject);\n\n if (this.options.useTransforms) {\n const sign = this.options.isRTL ? '-' : '';\n const x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x;\n const y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y;\n styles.transform = `translate(${sign}${x}px, ${y}px) scale(${item.scale})`;\n } else {\n if (this.options.isRTL) {\n styles.right = item.point.x + 'px';\n } else {\n styles.left = item.point.x + 'px';\n }\n styles.top = item.point.y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {function} itemCallback Callback for the item.\n * @param {function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(opts.styles);\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatch(Shuffle.EventType.LAYOUT);\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Object[]} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map((obj) => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Object[]} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map((obj) => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(obj.styles);\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|string[]|function(Element):boolean} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {SortOptions} [sortOptions] A sort object which can sort the visible set\n */\n filter(category, sortOptions) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortOptions);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {SortOptions} [sortOptions] The options object to pass to `sorter`.\n */\n sort(sortOptions = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n const items = sorter(this._getFilteredItems(), sortOptions);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = sortOptions;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated.\n */\n update(isOnlyLayout = false) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Element[]} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map((el) => new ShuffleItem(el, this.options.isRTL));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Determine which items will go with the current filter.\n this._resetCols();\n\n const allItems = this._mergeNewItems(items);\n const sortedItems = sorter(allItems, this.lastSort);\n const allSortedItemsSet = this._filter(this.lastFilter, sortedItems);\n\n const isNewItem = (item) => items.includes(item);\n const applyHiddenState = (item) => {\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n };\n\n // Layout all items again so that new items get positions.\n // Synchonously apply positions.\n const itemPositions = this._getNextPositions(allSortedItemsSet.visible);\n allSortedItemsSet.visible.forEach((item, i) => {\n if (isNewItem(item)) {\n item.point = itemPositions[i];\n applyHiddenState(item);\n item.applyCss(this.getStylesForTransition(item, {}));\n }\n });\n\n allSortedItemsSet.hidden.forEach((item) => {\n if (isNewItem(item)) {\n applyHiddenState(item);\n }\n });\n\n // Cause layout so that the styles above are applied.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Add transition to each item.\n this.setItemTransitions(items);\n\n // Update the list of items.\n this.items = this._mergeNewItems(items);\n\n // Update layout/visibility of new and old items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout = true) {\n this.isEnabled = true;\n if (isUpdateLayout) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items.\n * @param {Element[]} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle instance.\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map((element) => this.getItemByElement(element))\n .filter((item) => !!item);\n\n const handleLayout = () => {\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter((item) => !oldItems.includes(item));\n this._updateItemCount();\n\n this.once(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or undefined if it's not found.\n */\n getItemByElement(element) {\n return this.items.find((item) => item.element === element);\n }\n\n /**\n * Dump the elements currently stored and reinitialize all child elements which\n * match the `itemSelector`.\n */\n resetItems() {\n // Remove refs to current items.\n this._disposeItems(this.items);\n this.isInitialized = false;\n\n // Find new items in the DOM.\n this.items = this._getItems();\n\n // Set initial styles on the new items.\n this._initItems(this.items);\n\n this.once(Shuffle.EventType.LAYOUT, () => {\n // Add transition to each item.\n this.setItemTransitions(this.items);\n this.isInitialized = true;\n });\n\n // Lay out all items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems(this.items);\n\n this.items.length = 0;\n this._transitions.length = 0;\n\n // Null DOM references\n this.options.sizer = null;\n this.element = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n this.isEnabled = false;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. 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this.options.columnWidth?this.options.columnWidth(t):this.options.sizer?u.getSize(this.options.sizer).width:this.options.columnWidth?this.options.columnWidth:this.items.length>0?u.getSize(this.items[0].element,!0).width:t)&&(i=t),i+e}},{key:"_getGutterSize",value:function(t){return"function"==typeof this.options.gutterWidth?this.options.gutterWidth(t):this.options.sizer?S(this.options.sizer,"marginLeft"):this.options.gutterWidth}},{key:"_setColumns",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:u.getSize(this.element).width,e=this._getGutterSize(t),i=this._getColumnSize(t,e),n=(t+e)/i;Math.abs(Math.round(n)-n)1&&void 0!==arguments[1]?arguments[1]:{};this.isDestroyed||(e.shuffle=this,this.emit(t,e))}},{key:"_resetCols",value:function(){var t=this.cols;for(this.positions=[];t;)t-=1,this.positions.push(0)}},{key:"_layout",value:function(t){var e=this,i=this._getNextPositions(t),n=0;t.forEach((function(t,s){function o(){t.applyCss(E.Css.VISIBLE.after)}if(v.equals(t.point,i[s])&&!t.isHidden)return t.applyCss(E.Css.VISIBLE.before),void o();t.point=i[s],t.scale=E.Scale.VISIBLE,t.isHidden=!1;var r=e.getStylesForTransition(t,E.Css.VISIBLE.before);r.transitionDelay=e._getStaggerAmount(n)+"ms",e._queue.push({item:t,styles:r,callback:o}),n+=1}))}},{key:"_getNextPositions",value:function(t){var e=this;if(this.options.isCentered){var i=t.map((function(t,i){var n=u.getSize(t.element,!0),s=e._getItemPosition(n);return new y(s.x,s.y,n.width,n.height,i)}));return this.getTransformedPositions(i,this.containerWidth)}return t.map((function(t){return e._getItemPosition(u.getSize(t.element,!0))}))}},{key:"_getItemPosition",value:function(t){return function(t){for(var e=t.itemSize,i=t.positions,n=t.gridSize,s=t.total,o=t.threshold,r=t.buffer,l=M(e.width,n,s,o),a=A(i,l,s),u=F(a,r),h=new v(n*u,a[u]),f=a[u]+e.height,c=0;c0&&void 0!==arguments[0]?arguments[0]:this._getConcealedItems(),i=0;e.forEach((function(e){function n(){e.applyCss(E.Css.HIDDEN.after)}if(e.isHidden)return e.applyCss(E.Css.HIDDEN.before),void n();e.scale=E.Scale.HIDDEN,e.isHidden=!0;var s=t.getStylesForTransition(e,E.Css.HIDDEN.before);s.transitionDelay=t._getStaggerAmount(i)+"ms",t._queue.push({item:e,styles:s,callback:n}),i+=1}))}},{key:"_handleResize",value:function(){this.isEnabled&&!this.isDestroyed&&this.update()}},{key:"getStylesForTransition",value:function(t,e){var i=Object.assign({},e);if(this.options.useTransforms){var n=this.options.roundTransforms?Math.round(t.point.x):t.point.x,s=this.options.roundTransforms?Math.round(t.point.y):t.point.y;i.transform="translate(".concat(n,"px, ").concat(s,"px) scale(").concat(t.scale,")")}else i.left=t.point.x+"px",i.top=t.point.y+"px";return i}},{key:"_whenTransitionDone",value:function(t,e,i){var n=D(t,(function(t){e(),i(null,t)}));this._transitions.push(n)}},{key:"_getTransitionFunction",value:function(t){var e=this;return function(i){t.item.applyCss(t.styles),e._whenTransitionDone(t.item.element,t.callback,i)}}},{key:"_processQueue",value:function(){this.isTransitioning&&this._cancelMovement();var t=this.options.speed>0,e=this._queue.length>0;e&&t&&this.isInitialized?this._startTransitions(this._queue):e?(this._styleImmediately(this._queue),this._dispatch(u.EventType.LAYOUT)):this._dispatch(u.EventType.LAYOUT),this._queue.length=0}},{key:"_startTransitions",value:function(t){var e=this;this.isTransitioning=!0,function(t,e,i){i||("function"==typeof e?(i=e,e=null):i=p);var n=t&&t.length;if(!n)return i(null,[]);var s=!1,o=new Array(n);function r(t){return function(e,r){if(!s){if(e)return i(e,o),void(s=!0);o[t]=r,--n||i(null,o)}}}t.forEach(e?function(t,i){t.call(e,r(i))}:function(t,e){t(r(e))})}(t.map((function(t){return e._getTransitionFunction(t)})),this._movementFinished.bind(this))}},{key:"_cancelMovement",value:function(){this._transitions.forEach(L),this._transitions.length=0,this.isTransitioning=!1}},{key:"_styleImmediately",value:function(t){if(t.length){var e=t.map((function(t){return t.item.element}));u._skipTransitions(e,(function(){t.forEach((function(t){t.item.applyCss(t.styles),t.callback()}))}))}}},{key:"_movementFinished",value:function(){this._transitions.length=0,this.isTransitioning=!1,this._dispatch(u.EventType.LAYOUT)}},{key:"filter",value:function(t,e){this.isEnabled&&((!t||t&&0===t.length)&&(t=u.ALL_ITEMS),this._filter(t),this._shrink(),this._updateItemCount(),this.sort(e))}},{key:"sort",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.lastSort;if(this.isEnabled){this._resetCols();var e=k(this._getFilteredItems(),t);this._layout(e),this._processQueue(),this._setContainerSize(),this.lastSort=t}}},{key:"update",value:function(){var t=arguments.length>0&&void 0!==arguments[0]&&arguments[0];this.isEnabled&&(t||this._setColumns(),this.sort())}},{key:"layout",value:function(){this.update(!0)}},{key:"add",value:function(t){var e=this,i=O(t).map((function(t){return new E(t)}));this._initItems(i),this._resetCols();var n=k(this._mergeNewItems(i),this.lastSort),s=this._filter(this.lastFilter,n),o=function(t){return i.includes(t)},r=function(t){t.scale=E.Scale.HIDDEN,t.isHidden=!0,t.applyCss(E.Css.HIDDEN.before),t.applyCss(E.Css.HIDDEN.after)},l=this._getNextPositions(s.visible);s.visible.forEach((function(t,i){o(t)&&(t.point=l[i],r(t),t.applyCss(e.getStylesForTransition(t,{})))})),s.hidden.forEach((function(t){o(t)&&r(t)})),this.element.offsetWidth,this.setItemTransitions(i),this.items=this._mergeNewItems(i),this.filter(this.lastFilter)}},{key:"disable",value:function(){this.isEnabled=!1}},{key:"enable",value:function(){var t=!(arguments.length>0&&void 0!==arguments[0])||arguments[0];this.isEnabled=!0,t&&this.update()}},{key:"remove",value:function(t){var e=this;if(t.length){var i=O(t),n=i.map((function(t){return e.getItemByElement(t)})).filter((function(t){return!!t}));this._toggleFilterClasses({visible:[],hidden:n}),this._shrink(n),this.sort(),this.items=this.items.filter((function(t){return!n.includes(t)})),this._updateItemCount(),this.once(u.EventType.LAYOUT,(function(){e._disposeItems(n),i.forEach((function(t){t.parentNode.removeChild(t)})),e._dispatch(u.EventType.REMOVED,{collection:i})}))}}},{key:"getItemByElement",value:function(t){return this.items.find((function(e){return e.element===t}))}},{key:"resetItems",value:function(){var t=this;this._disposeItems(this.items),this.isInitialized=!1,this.items=this._getItems(),this._initItems(this.items),this.once(u.EventType.LAYOUT,(function(){t.setItemTransitions(t.items),t.isInitialized=!0})),this.filter(this.lastFilter)}},{key:"destroy",value:function(){this._cancelMovement(),window.removeEventListener("resize",this._onResize),this.element.classList.remove("shuffle"),this.element.removeAttribute("style"),this._disposeItems(this.items),this.items.length=0,this._transitions.length=0,this.options.sizer=null,this.element=null,this.isDestroyed=!0,this.isEnabled=!1}}],[{key:"getSize",value:function(t){var e=arguments.length>1&&void 0!==arguments[1]&&arguments[1],i=window.getComputedStyle(t,null),n=S(t,"width",i),s=S(t,"height",i);if(e){var o=S(t,"marginLeft",i),r=S(t,"marginRight",i),l=S(t,"marginTop",i),a=S(t,"marginBottom",i);n+=o+r,s+=l+a}return{width:n,height:s}}},{key:"_skipTransitions",value:function(t,e){var i=t.map((function(t){var e=t.style,i=e.transitionDuration,n=e.transitionDelay;return e.transitionDuration="0ms",e.transitionDelay="0ms",{duration:i,delay:n}}));e(),t[0].offsetWidth,t.forEach((function(t,e){t.style.transitionDuration=i[e].duration,t.style.transitionDelay=i[e].delay}))}}]),u}(a);return H.ShuffleItem=E,H.ALL_ITEMS="all",H.FILTER_ATTRIBUTE_KEY="groups",H.EventType={LAYOUT:"shuffle:layout",REMOVED:"shuffle:removed"},H.Classes=g,H.FilterMode={ANY:"any",ALL:"all"},H.options={group:H.ALL_ITEMS,speed:250,easing:"cubic-bezier(0.4, 0.0, 0.2, 1)",itemSelector:"*",sizer:null,gutterWidth:0,columnWidth:0,delimiter:null,buffer:0,columnThreshold:.01,initialSort:null,throttle:d,throttleTime:300,staggerAmount:15,staggerAmountMax:150,useTransforms:!0,filterMode:H.FilterMode.ANY,isCentered:!1,roundTransforms:!0},H.Point=v,H.Rect=y,H.__sorter=k,H.__getColumnSpan=M,H.__getAvailablePositions=A,H.__getShortColumn=F,H.__getCenteredPositions=x,H})); +!function(t,e){"object"==typeof exports&&"undefined"!=typeof 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N=0,B=function(e){!function(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function");t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,writable:!0,configurable:!0}}),e&&s(t,e)}(o,e);var n=r(o);function o(e){var i,s=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};t(this,o),(i=n.call(this)).options=Object.assign({},o.options,s),i.options.delimeter&&(i.options.delimiter=i.options.delimeter),i.lastSort={},i.group=o.ALL_ITEMS,i.lastFilter=o.ALL_ITEMS,i.isEnabled=!0,i.isDestroyed=!1,i.isInitialized=!1,i._transitions=[],i.isTransitioning=!1,i._queue=[];var r=i._getElementOption(e);if(!r)throw new TypeError("Shuffle needs to be initialized with an element.");return i.element=r,i.id="shuffle_"+N,N+=1,i._init(),i.isInitialized=!0,i}return i(o,[{key:"_init",value:function(){if(this.items=this._getItems(),this.options.sizer=this._getElementOption(this.options.sizer),this.element.classList.add(o.Classes.BASE),this._initItems(this.items),this._onResize=this._getResizeFunction(),window.addEventListener("resize",this._onResize),"complete"!==document.readyState){var t=this.layout.bind(this);window.addEventListener("load",(function e(){window.removeEventListener("load",e),t()}))}var e=window.getComputedStyle(this.element,null),i=o.getSize(this.element).width;this._validateStyles(e),this._setColumns(i),this.filter(this.options.group,this.options.initialSort),this.element.offsetWidth,this.setItemTransitions(this.items),this.element.style.transition="height ".concat(this.options.speed,"ms ").concat(this.options.easing)}},{key:"_getResizeFunction",value:function(){var t=this._handleResize.bind(this);return this.options.throttle?this.options.throttle(t,this.options.throttleTime):t}},{key:"_getElementOption",value:function(t){return"string"==typeof t?this.element.querySelector(t):t&&t.nodeType&&1===t.nodeType?t:t&&t.jquery?t[0]:null}},{key:"_validateStyles",value:function(t){"static"===t.position&&(this.element.style.position="relative"),"hidden"!==t.overflow&&(this.element.style.overflow="hidden")}},{key:"_filter",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.lastFilter,e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:this.items,i=this._getFilteredSets(t,e);return this._toggleFilterClasses(i),this.lastFilter=t,"string"==typeof t&&(this.group=t),i}},{key:"_getFilteredSets",value:function(t,e){var i=this,n=[],s=[];return t===o.ALL_ITEMS?n=e:e.forEach((function(e){i._doesPassFilter(t,e.element)?n.push(e):s.push(e)})),{visible:n,hidden:s}}},{key:"_doesPassFilter",value:function(t,e){if("function"==typeof t)return t.call(e,e,this);var i=e.getAttribute("data-"+o.FILTER_ATTRIBUTE_KEY),n=this.options.delimiter?i.split(this.options.delimiter):JSON.parse(i);function s(t){return n.includes(t)}return Array.isArray(t)?this.options.filterMode===o.FilterMode.ANY?t.some(s):t.every(s):n.includes(t)}},{key:"_toggleFilterClasses",value:function(t){var e=t.visible,i=t.hidden;e.forEach((function(t){t.show()})),i.forEach((function(t){t.hide()}))}},{key:"_initItems",value:function(t){t.forEach((function(t){t.init()}))}},{key:"_disposeItems",value:function(t){t.forEach((function(t){t.dispose()}))}},{key:"_updateItemCount",value:function(){this.visibleItems=this._getFilteredItems().length}},{key:"setItemTransitions",value:function(t){var e=this.options,i=e.speed,n=e.easing,s=this.options.useTransforms?["transform"]:["top","left"],o=Object.keys(E.Css.HIDDEN.before).map((function(t){return t.replace(/([A-Z])/g,(function(t,e){return"-".concat(e.toLowerCase())}))})),r=s.concat(o).join();t.forEach((function(t){t.element.style.transitionDuration=i+"ms",t.element.style.transitionTimingFunction=n,t.element.style.transitionProperty=r}))}},{key:"_getItems",value:function(){var t=this;return Array.from(this.element.children).filter((function(e){return c(e,t.options.itemSelector)})).map((function(e){return new E(e,t.options.isRTL)}))}},{key:"_mergeNewItems",value:function(t){var e=Array.from(this.element.children);return k(this.items.concat(t),{by:function(t){return e.indexOf(t)}})}},{key:"_getFilteredItems",value:function(){return this.items.filter((function(t){return t.isVisible}))}},{key:"_getConcealedItems",value:function(){return this.items.filter((function(t){return!t.isVisible}))}},{key:"_getColumnSize",value:function(t,e){var i;return 0===(i="function"==typeof this.options.columnWidth?this.options.columnWidth(t):this.options.sizer?o.getSize(this.options.sizer).width:this.options.columnWidth?this.options.columnWidth:this.items.length>0?o.getSize(this.items[0].element,!0).width:t)&&(i=t),i+e}},{key:"_getGutterSize",value:function(t){return"function"==typeof this.options.gutterWidth?this.options.gutterWidth(t):this.options.sizer?T(this.options.sizer,"marginLeft"):this.options.gutterWidth}},{key:"_setColumns",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:o.getSize(this.element).width,e=this._getGutterSize(t),i=this._getColumnSize(t,e),n=(t+e)/i;Math.abs(Math.round(n)-n)1&&void 0!==arguments[1]?arguments[1]:{};this.isDestroyed||(e.shuffle=this,this.emit(t,e))}},{key:"_resetCols",value:function(){var t=this.cols;for(this.positions=[];t;)t-=1,this.positions.push(0)}},{key:"_layout",value:function(t){var e=this,i=this._getNextPositions(t),n=0;t.forEach((function(t,s){function o(){t.applyCss(E.Css.VISIBLE.after)}if(v.equals(t.point,i[s])&&!t.isHidden)return t.applyCss(E.Css.VISIBLE.before),void o();t.point=i[s],t.scale=E.Scale.VISIBLE,t.isHidden=!1;var r=e.getStylesForTransition(t,E.Css.VISIBLE.before);r.transitionDelay=e._getStaggerAmount(n)+"ms",e._queue.push({item:t,styles:r,callback:o}),n+=1}))}},{key:"_getNextPositions",value:function(t){var e=this;if(this.options.isCentered){var i=t.map((function(t,i){var n=o.getSize(t.element,!0),s=e._getItemPosition(n);return new y(s.x,s.y,n.width,n.height,i)}));return this.getTransformedPositions(i,this.containerWidth)}return t.map((function(t){return e._getItemPosition(o.getSize(t.element,!0))}))}},{key:"_getItemPosition",value:function(t){return function(t){for(var e=t.itemSize,i=t.positions,n=t.gridSize,s=t.total,o=t.threshold,r=t.buffer,l=A(e.width,n,s,o),a=F(i,l,s),u=x(a,r),h=new v(n*u,a[u]),f=a[u]+e.height,c=0;c0&&void 0!==arguments[0]?arguments[0]:this._getConcealedItems(),i=0;e.forEach((function(e){function n(){e.applyCss(E.Css.HIDDEN.after)}if(e.isHidden)return e.applyCss(E.Css.HIDDEN.before),void n();e.scale=E.Scale.HIDDEN,e.isHidden=!0;var s=t.getStylesForTransition(e,E.Css.HIDDEN.before);s.transitionDelay=t._getStaggerAmount(i)+"ms",t._queue.push({item:e,styles:s,callback:n}),i+=1}))}},{key:"_handleResize",value:function(){this.isEnabled&&!this.isDestroyed&&this.update()}},{key:"getStylesForTransition",value:function(t,e){var i=Object.assign({},e);if(this.options.useTransforms){var n=this.options.isRTL?"-":"",s=this.options.roundTransforms?Math.round(t.point.x):t.point.x,o=this.options.roundTransforms?Math.round(t.point.y):t.point.y;i.transform="translate(".concat(n).concat(s,"px, ").concat(o,"px) scale(").concat(t.scale,")")}else this.options.isRTL?i.right=t.point.x+"px":i.left=t.point.x+"px",i.top=t.point.y+"px";return i}},{key:"_whenTransitionDone",value:function(t,e,i){var n=z(t,(function(t){e(),i(null,t)}));this._transitions.push(n)}},{key:"_getTransitionFunction",value:function(t){var e=this;return function(i){t.item.applyCss(t.styles),e._whenTransitionDone(t.item.element,t.callback,i)}}},{key:"_processQueue",value:function(){this.isTransitioning&&this._cancelMovement();var t=this.options.speed>0,e=this._queue.length>0;e&&t&&this.isInitialized?this._startTransitions(this._queue):e?(this._styleImmediately(this._queue),this._dispatch(o.EventType.LAYOUT)):this._dispatch(o.EventType.LAYOUT),this._queue.length=0}},{key:"_startTransitions",value:function(t){var e=this;this.isTransitioning=!0,function(t,e,i){i||("function"==typeof e?(i=e,e=null):i=p);var n=t&&t.length;if(!n)return i(null,[]);var s=!1,o=new Array(n);function r(t){return function(e,r){if(!s){if(e)return i(e,o),void(s=!0);o[t]=r,--n||i(null,o)}}}t.forEach(e?function(t,i){t.call(e,r(i))}:function(t,e){t(r(e))})}(t.map((function(t){return e._getTransitionFunction(t)})),this._movementFinished.bind(this))}},{key:"_cancelMovement",value:function(){this._transitions.forEach(D),this._transitions.length=0,this.isTransitioning=!1}},{key:"_styleImmediately",value:function(t){if(t.length){var e=t.map((function(t){return t.item.element}));o._skipTransitions(e,(function(){t.forEach((function(t){t.item.applyCss(t.styles),t.callback()}))}))}}},{key:"_movementFinished",value:function(){this._transitions.length=0,this.isTransitioning=!1,this._dispatch(o.EventType.LAYOUT)}},{key:"filter",value:function(t,e){this.isEnabled&&((!t||t&&0===t.length)&&(t=o.ALL_ITEMS),this._filter(t),this._shrink(),this._updateItemCount(),this.sort(e))}},{key:"sort",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.lastSort;if(this.isEnabled){this._resetCols();var e=k(this._getFilteredItems(),t);this._layout(e),this._processQueue(),this._setContainerSize(),this.lastSort=t}}},{key:"update",value:function(){var t=arguments.length>0&&void 0!==arguments[0]&&arguments[0];this.isEnabled&&(t||this._setColumns(),this.sort())}},{key:"layout",value:function(){this.update(!0)}},{key:"add",value:function(t){var e=this,i=R(t).map((function(t){return new E(t,e.options.isRTL)}));this._initItems(i),this._resetCols();var n=k(this._mergeNewItems(i),this.lastSort),s=this._filter(this.lastFilter,n),o=function(t){return i.includes(t)},r=function(t){t.scale=E.Scale.HIDDEN,t.isHidden=!0,t.applyCss(E.Css.HIDDEN.before),t.applyCss(E.Css.HIDDEN.after)},l=this._getNextPositions(s.visible);s.visible.forEach((function(t,i){o(t)&&(t.point=l[i],r(t),t.applyCss(e.getStylesForTransition(t,{})))})),s.hidden.forEach((function(t){o(t)&&r(t)})),this.element.offsetWidth,this.setItemTransitions(i),this.items=this._mergeNewItems(i),this.filter(this.lastFilter)}},{key:"disable",value:function(){this.isEnabled=!1}},{key:"enable",value:function(){var t=!(arguments.length>0&&void 0!==arguments[0])||arguments[0];this.isEnabled=!0,t&&this.update()}},{key:"remove",value:function(t){var e=this;if(t.length){var i=R(t),n=i.map((function(t){return e.getItemByElement(t)})).filter((function(t){return!!t}));this._toggleFilterClasses({visible:[],hidden:n}),this._shrink(n),this.sort(),this.items=this.items.filter((function(t){return!n.includes(t)})),this._updateItemCount(),this.once(o.EventType.LAYOUT,(function(){e._disposeItems(n),i.forEach((function(t){t.parentNode.removeChild(t)})),e._dispatch(o.EventType.REMOVED,{collection:i})}))}}},{key:"getItemByElement",value:function(t){return this.items.find((function(e){return e.element===t}))}},{key:"resetItems",value:function(){var t=this;this._disposeItems(this.items),this.isInitialized=!1,this.items=this._getItems(),this._initItems(this.items),this.once(o.EventType.LAYOUT,(function(){t.setItemTransitions(t.items),t.isInitialized=!0})),this.filter(this.lastFilter)}},{key:"destroy",value:function(){this._cancelMovement(),window.removeEventListener("resize",this._onResize),this.element.classList.remove("shuffle"),this.element.removeAttribute("style"),this._disposeItems(this.items),this.items.length=0,this._transitions.length=0,this.options.sizer=null,this.element=null,this.isDestroyed=!0,this.isEnabled=!1}}],[{key:"getSize",value:function(t){var e=arguments.length>1&&void 0!==arguments[1]&&arguments[1],i=window.getComputedStyle(t,null),n=T(t,"width",i),s=T(t,"height",i);if(e){var o=T(t,"marginLeft",i),r=T(t,"marginRight",i),l=T(t,"marginTop",i),a=T(t,"marginBottom",i);n+=o+r,s+=l+a}return{width:n,height:s}}},{key:"_skipTransitions",value:function(t,e){var i=t.map((function(t){var e=t.style,i=e.transitionDuration,n=e.transitionDelay;return e.transitionDuration="0ms",e.transitionDelay="0ms",{duration:i,delay:n}}));e(),t[0].offsetWidth,t.forEach((function(t,e){t.style.transitionDuration=i[e].duration,t.style.transitionDelay=i[e].delay}))}}]),o}(a);return B.ShuffleItem=E,B.ALL_ITEMS="all",B.FILTER_ATTRIBUTE_KEY="groups",B.EventType={LAYOUT:"shuffle:layout",REMOVED:"shuffle:removed"},B.Classes=g,B.FilterMode={ANY:"any",ALL:"all"},B.options={group:B.ALL_ITEMS,speed:250,easing:"cubic-bezier(0.4, 0.0, 0.2, 1)",itemSelector:"*",sizer:null,gutterWidth:0,columnWidth:0,delimiter:null,buffer:0,columnThreshold:.01,initialSort:null,throttle:d,throttleTime:300,staggerAmount:15,staggerAmountMax:150,useTransforms:!0,filterMode:B.FilterMode.ANY,isCentered:!1,isRTL:!1,roundTransforms:!0},B.Point=v,B.Rect=y,B.__sorter=k,B.__getColumnSpan=A,B.__getAvailablePositions=F,B.__getShortColumn=x,B.__getCenteredPositions=O,B})); //# sourceMappingURL=shuffle.min.js.map diff --git a/docs/dist/shuffle.min.js.map b/docs/dist/shuffle.min.js.map index 97bb8dd..50199b1 100644 --- a/docs/dist/shuffle.min.js.map +++ b/docs/dist/shuffle.min.js.map @@ -1 +1 @@ -{"version":3,"file":"shuffle.min.js","sources":["../node_modules/tiny-emitter/index.js","../node_modules/matches-selector/index.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/point.js","../src/rect.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/layout.js","../src/array-min.js","../src/shuffle.js","../src/hyphenate.js"],"sourcesContent":["function E () {\n // Keep this empty so it's easier to inherit from\n // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)\n}\n\nE.prototype = {\n on: function (name, callback, ctx) {\n var e = this.e || (this.e = {});\n\n (e[name] || (e[name] = [])).push({\n fn: callback,\n ctx: ctx\n });\n\n return this;\n },\n\n once: function (name, callback, ctx) {\n var self = this;\n function listener () {\n self.off(name, listener);\n callback.apply(ctx, arguments);\n };\n\n listener._ = callback\n return this.on(name, listener, ctx);\n },\n\n emit: function (name) {\n var data = [].slice.call(arguments, 1);\n var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n var i = 0;\n var len = evtArr.length;\n\n for (i; i < len; i++) {\n evtArr[i].fn.apply(evtArr[i].ctx, data);\n }\n\n return this;\n },\n\n off: function (name, callback) {\n var e = this.e || (this.e = {});\n var evts = e[name];\n var liveEvents = [];\n\n if (evts && callback) {\n for (var i = 0, len = evts.length; i < len; i++) {\n if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n liveEvents.push(evts[i]);\n }\n }\n\n // Remove event from queue to prevent memory leak\n // Suggested by https://github.com/lazd\n // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n (liveEvents.length)\n ? e[name] = liveEvents\n : delete e[name];\n\n return this;\n }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n","'use strict';\n\nvar proto = typeof Element !== 'undefined' ? Element.prototype : {};\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (!el || el.nodeType !== 1) return false;\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\n\nclass Point {\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default class Rect {\n /**\n * Class for representing rectangular regions.\n * https://github.com/google/closure-library/blob/master/closure/goog/math/rect.js\n * @param {number} x Left.\n * @param {number} y Top.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} id Identifier\n * @constructor\n */\n constructor(x, y, w, h, id) {\n this.id = id;\n\n /** @type {number} */\n this.left = x;\n\n /** @type {number} */\n this.top = y;\n\n /** @type {number} */\n this.width = w;\n\n /** @type {number} */\n this.height = h;\n }\n\n /**\n * Returns whether two rectangles intersect.\n * @param {Rect} a A Rectangle.\n * @param {Rect} b A Rectangle.\n * @return {boolean} Whether a and b intersect.\n */\n static intersects(a, b) {\n return (\n a.left < b.left + b.width && b.left < a.left + a.width\n && a.top < b.top + b.height && b.top < a.top + a.height);\n }\n}\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element) {\n id += 1;\n this.id = id;\n this.element = element;\n\n /**\n * Used to separate items for layout and shrink.\n */\n this.isVisible = true;\n\n /**\n * Used to determine if a transition will happen. By the time the _layout\n * and _shrink methods get the ShuffleItem instances, the `isVisible` value\n * has already been changed by the separation methods, so this property is\n * needed to know if the item was visible/hidden before the shrink/layout.\n */\n this.isHidden = false;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n this.element.removeAttribute('aria-hidden');\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n this.element.setAttribute('aria-hidden', true);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n left: 0,\n visibility: 'visible',\n willChange: 'transform',\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {\n transitionDelay: '',\n },\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n transitionDelay: '',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","let value = null;\nexport default () => {\n if (value !== null) {\n return value;\n }\n\n const element = document.body || document.documentElement;\n const e = document.createElement('div');\n e.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;';\n element.appendChild(e);\n\n value = window.getComputedStyle(e, null).width === '10px';\n\n element.removeChild(e);\n\n return value;\n};\n","import getNumber from './get-number';\nimport testComputedSize from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(\n element, style,\n styles = window.getComputedStyle(element, null),\n) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!testComputedSize() && style === 'width') {\n value += getNumber(styles.paddingLeft)\n + getNumber(styles.paddingRight)\n + getNumber(styles.borderLeftWidth)\n + getNumber(styles.borderRightWidth);\n } else if (!testComputedSize() && style === 'height') {\n value += getNumber(styles.paddingTop)\n + getNumber(styles.paddingBottom)\n + getNumber(styles.borderTopWidth)\n + getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // Custom sort function\n compare: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n/**\n * You can return `undefined` from the `by` function to revert to DOM order.\n * @param {Array} arr Array to sort.\n * @param {SortOptions} options Sorting options.\n * @return {Array}\n */\nexport default function sorter(arr, options) {\n // eslint-disable-next-line prefer-object-spread\n const opts = Object.assign({}, defaults, options);\n const original = Array.from(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n } else if (typeof opts.compare === 'function') {\n arr.sort(opts.compare);\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport Rect from './rect';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 10]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 10]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({\n itemSize, positions, gridSize, total, threshold, buffer,\n}) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]);\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n\n/**\n * This method attempts to center items. This method could potentially be slow\n * with a large number of items because it must place items, then check every\n * previous item to ensure there is no overlap.\n * @param {Array.} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Array.}\n */\nexport function getCenteredPositions(itemRects, containerWidth) {\n const rowMap = {};\n\n // Populate rows by their offset because items could jump between rows like:\n // a c\n // bbb\n itemRects.forEach((itemRect) => {\n if (rowMap[itemRect.top]) {\n // Push the point to the last row array.\n rowMap[itemRect.top].push(itemRect);\n } else {\n // Start of a new row.\n rowMap[itemRect.top] = [itemRect];\n }\n });\n\n // For each row, find the end of the last item, then calculate\n // the remaining space by dividing it by 2. Then add that\n // offset to the x position of each point.\n let rects = [];\n const rows = [];\n const centeredRows = [];\n Object.keys(rowMap).forEach((key) => {\n const itemRects = rowMap[key];\n rows.push(itemRects);\n const lastItem = itemRects[itemRects.length - 1];\n const end = lastItem.left + lastItem.width;\n const offset = Math.round((containerWidth - end) / 2);\n\n let finalRects = itemRects;\n let canMove = false;\n if (offset > 0) {\n const newRects = [];\n canMove = itemRects.every((r) => {\n const newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id);\n\n // Check all current rects to make sure none overlap.\n const noOverlap = !rects.some((r) => Rect.intersects(newRect, r));\n\n newRects.push(newRect);\n return noOverlap;\n });\n\n // If none of the rectangles overlapped, the whole group can be centered.\n if (canMove) {\n finalRects = newRects;\n }\n }\n\n // If the items are not going to be offset, ensure that the original\n // placement for this row will not overlap previous rows (row-spanning\n // elements could be in the way).\n if (!canMove) {\n let intersectingRect;\n const hasOverlap = itemRects.some((itemRect) => rects.some((r) => {\n const intersects = Rect.intersects(itemRect, r);\n if (intersects) {\n intersectingRect = r;\n }\n return intersects;\n }));\n\n // If there is any overlap, replace the overlapping row with the original.\n if (hasOverlap) {\n const rowIndex = centeredRows.findIndex((items) => items.includes(intersectingRect));\n centeredRows.splice(rowIndex, 1, rows[rowIndex]);\n }\n }\n\n rects = rects.concat(finalRects);\n centeredRows.push(finalRects);\n });\n\n // Reduce array of arrays to a single array of points.\n // https://stackoverflow.com/a/10865042/373422\n // Then reset sort back to how the items were passed to this method.\n // Remove the wrapper object with index, map to a Point.\n return [].concat.apply([], centeredRows) // eslint-disable-line prefer-spread\n .sort((a, b) => (a.id - b.id))\n .map((itemRect) => new Point(itemRect.left, itemRect.top));\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import TinyEmitter from 'tiny-emitter';\nimport matches from 'matches-selector';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\n\nimport Point from './point';\nimport Rect from './rect';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport {\n getItemPosition,\n getColumnSpan,\n getAvailablePositions,\n getShortColumn,\n getCenteredPositions,\n} from './layout';\nimport arrayMax from './array-max';\nimport hyphenate from './hyphenate';\n\nfunction arrayUnique(x) {\n return Array.from(new Set(x));\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle extends TinyEmitter {\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n super();\n // eslint-disable-next-line prefer-object-spread\n this.options = Object.assign({}, Shuffle.options, options);\n\n // Allow misspelling of delimiter since that's how it used to be.\n // Remove in v6.\n if (this.options.delimeter) {\n this.options.delimiter = this.options.delimeter;\n }\n\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems(this.items);\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // If the page has not already emitted the `load` event, call layout on load.\n // This avoids layout issues caused by images and fonts loading after the\n // instance has been initialized.\n if (document.readyState !== 'complete') {\n const layout = this.layout.bind(this);\n window.addEventListener('load', function onLoad() {\n window.removeEventListener('load', onLoad);\n layout();\n });\n }\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this.setItemTransitions(this.items);\n this.element.style.transition = `height ${this.options.speed}ms ${this.options.easing}`;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle\n ? this.options.throttle(resizeFunction, this.options.throttleTime)\n : resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n }\n\n // Check for an element\n if (option && option.nodeType && option.nodeType === 1) {\n return option;\n }\n\n // Check for jQuery object\n if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string|string[]|function(Element):boolean} [category] Category to\n * filter by. If it's given, the last category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|string[]|function(Element):boolean} category Category or function to filter by.\n * @param {ShuffleItem[]} items A collection of items to filter.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|string[]|function():boolean} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimiter\n ? attr.split(this.options.delimiter)\n : JSON.parse(attr);\n\n function testCategory(category) {\n return keys.includes(category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return keys.includes(category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {ShuffleItem[]} items Set to initialize.\n * @private\n */\n _initItems(items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @param {ShuffleItem[]} items Set to dispose.\n * @private\n */\n _disposeItems(items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of a new Shuffle instance.\n * @param {ShuffleItem[]} items Shuffle items to set transitions on.\n * @protected\n */\n setItemTransitions(items) {\n const { speed, easing } = this.options;\n const positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left'];\n\n // Allow users to transtion other properties if they exist in the `before`\n // css mapping of the shuffle item.\n const cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map((k) => hyphenate(k));\n const properties = positionProps.concat(cssProps).join();\n\n items.forEach((item) => {\n item.element.style.transitionDuration = speed + 'ms';\n item.element.style.transitionTimingFunction = easing;\n item.element.style.transitionProperty = properties;\n });\n }\n\n _getItems() {\n return Array.from(this.element.children)\n .filter((el) => matches(el, this.options.itemSelector))\n .map((el) => new ShuffleItem(el));\n }\n\n /**\n * Combine the current items array with a new one and sort it by DOM order.\n * @param {ShuffleItem[]} items Items to track.\n * @return {ShuffleItem[]}\n */\n _mergeNewItems(items) {\n const children = Array.from(this.element.children);\n return sorter(this.items.concat(items), {\n by(element) {\n return children.indexOf(element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter((item) => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter((item) => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.options.sizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.options.sizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns)\n < this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns || 0), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * Emit an event from this instance.\n * @param {string} name Event name.\n * @param {Object} [data={}] Optional object data.\n */\n _dispatch(name, data = {}) {\n if (this.isDestroyed) {\n return;\n }\n\n data.shuffle = this;\n this.emit(name, data);\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {ShuffleItem[]} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n const itemPositions = this._getNextPositions(items);\n\n let count = 0;\n items.forEach((item, i) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = itemPositions[i];\n item.scale = ShuffleItem.Scale.VISIBLE;\n item.isHidden = false;\n\n // Clone the object so that the `before` object isn't modified when the\n // transition delay is added.\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Return an array of Point instances representing the future positions of\n * each item.\n * @param {ShuffleItem[]} items Array of sorted shuffle items.\n * @return {Point[]}\n * @private\n */\n _getNextPositions(items) {\n // If position data is going to be changed, add the item's size to the\n // transformer to allow for calculations.\n if (this.options.isCentered) {\n const itemsData = items.map((item, i) => {\n const itemSize = Shuffle.getSize(item.element, true);\n const point = this._getItemPosition(itemSize);\n return new Rect(point.x, point.y, itemSize.width, itemSize.height, i);\n });\n\n return this.getTransformedPositions(itemsData, this.containerWidth);\n }\n\n // If no transforms are going to happen, simply return an array of the\n // future points of each item.\n return items.map((item) => this._getItemPosition(Shuffle.getSize(item.element, true)));\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Mutate positions before they're applied.\n * @param {Rect[]} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Point[]}\n * @protected\n */\n getTransformedPositions(itemRects, containerWidth) {\n return getCenteredPositions(itemRects, containerWidth);\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {ShuffleItem[]} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.isHidden) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {ShuffleItem} item Item to get styles for. Should have updated\n * scale and point properties.\n * @param {Object} styleObject Extra styles that will be used in the transition.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @protected\n */\n getStylesForTransition(item, styleObject) {\n // Clone the object to avoid mutating the original.\n // eslint-disable-next-line prefer-object-spread\n const styles = Object.assign({}, styleObject);\n\n if (this.options.useTransforms) {\n const x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x;\n const y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y;\n styles.transform = `translate(${x}px, ${y}px) scale(${item.scale})`;\n } else {\n styles.left = item.point.x + 'px';\n styles.top = item.point.y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {function} itemCallback Callback for the item.\n * @param {function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(opts.styles);\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. 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This is what makes the plugin 'shuffle'\n * @param {string|string[]|function(Element):boolean} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {SortOptions} [sortOptions] A sort object which can sort the visible set\n */\n filter(category, sortOptions) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortOptions);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {SortOptions} [sortOptions] The options object to pass to `sorter`.\n */\n sort(sortOptions = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n const items = sorter(this._getFilteredItems(), sortOptions);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = sortOptions;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated.\n */\n update(isOnlyLayout = false) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Element[]} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map((el) => new ShuffleItem(el));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Determine which items will go with the current filter.\n this._resetCols();\n\n const allItems = this._mergeNewItems(items);\n const sortedItems = sorter(allItems, this.lastSort);\n const allSortedItemsSet = this._filter(this.lastFilter, sortedItems);\n\n const isNewItem = (item) => items.includes(item);\n const applyHiddenState = (item) => {\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n };\n\n // Layout all items again so that new items get positions.\n // Synchonously apply positions.\n const itemPositions = this._getNextPositions(allSortedItemsSet.visible);\n allSortedItemsSet.visible.forEach((item, i) => {\n if (isNewItem(item)) {\n item.point = itemPositions[i];\n applyHiddenState(item);\n item.applyCss(this.getStylesForTransition(item, {}));\n }\n });\n\n allSortedItemsSet.hidden.forEach((item) => {\n if (isNewItem(item)) {\n applyHiddenState(item);\n }\n });\n\n // Cause layout so that the styles above are applied.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Add transition to each item.\n this.setItemTransitions(items);\n\n // Update the list of items.\n this.items = this._mergeNewItems(items);\n\n // Update layout/visibility of new and old items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout = true) {\n this.isEnabled = true;\n if (isUpdateLayout) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items.\n * @param {Element[]} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle instance.\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map((element) => this.getItemByElement(element))\n .filter((item) => !!item);\n\n const handleLayout = () => {\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter((item) => !oldItems.includes(item));\n this._updateItemCount();\n\n this.once(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or undefined if it's not found.\n */\n getItemByElement(element) {\n return this.items.find((item) => item.element === element);\n }\n\n /**\n * Dump the elements currently stored and reinitialize all child elements which\n * match the `itemSelector`.\n */\n resetItems() {\n // Remove refs to current items.\n this._disposeItems(this.items);\n this.isInitialized = false;\n\n // Find new items in the DOM.\n this.items = this._getItems();\n\n // Set initial styles on the new items.\n this._initItems(this.items);\n\n this.once(Shuffle.EventType.LAYOUT, () => {\n // Add transition to each item.\n this.setItemTransitions(this.items);\n this.isInitialized = true;\n });\n\n // Lay out all items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems(this.items);\n\n this.items.length = 0;\n this._transitions.length = 0;\n\n // Null DOM references\n this.options.sizer = null;\n this.element = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n this.isEnabled = false;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. 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\ No newline at end of file +{"version":3,"file":"shuffle.min.js","sources":["../node_modules/tiny-emitter/index.js","../node_modules/matches-selector/index.js","../node_modules/throttleit/index.js","../node_modules/array-parallel/index.js","../src/get-number.js","../src/point.js","../src/rect.js","../src/classes.js","../src/shuffle-item.js","../src/computed-size.js","../src/get-number-style.js","../src/sorter.js","../src/on-transition-end.js","../src/array-max.js","../src/layout.js","../src/array-min.js","../src/shuffle.js","../src/hyphenate.js"],"sourcesContent":["function E () {\n // Keep this empty so it's easier to inherit from\n // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)\n}\n\nE.prototype = {\n on: function (name, callback, ctx) {\n var e = this.e || (this.e = {});\n\n (e[name] || (e[name] = [])).push({\n fn: callback,\n ctx: ctx\n });\n\n return this;\n },\n\n once: function (name, callback, ctx) {\n var self = this;\n function listener () {\n self.off(name, listener);\n callback.apply(ctx, arguments);\n };\n\n listener._ = callback\n return this.on(name, listener, ctx);\n },\n\n emit: function (name) {\n var data = [].slice.call(arguments, 1);\n var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n var i = 0;\n var len = evtArr.length;\n\n for (i; i < len; i++) {\n evtArr[i].fn.apply(evtArr[i].ctx, data);\n }\n\n return this;\n },\n\n off: function (name, callback) {\n var e = this.e || (this.e = {});\n var evts = e[name];\n var liveEvents = [];\n\n if (evts && callback) {\n for (var i = 0, len = evts.length; i < len; i++) {\n if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n liveEvents.push(evts[i]);\n }\n }\n\n // Remove event from queue to prevent memory leak\n // Suggested by https://github.com/lazd\n // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n (liveEvents.length)\n ? e[name] = liveEvents\n : delete e[name];\n\n return this;\n }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n","'use strict';\n\nvar proto = typeof Element !== 'undefined' ? Element.prototype : {};\nvar vendor = proto.matches\n || proto.matchesSelector\n || proto.webkitMatchesSelector\n || proto.mozMatchesSelector\n || proto.msMatchesSelector\n || proto.oMatchesSelector;\n\nmodule.exports = match;\n\n/**\n * Match `el` to `selector`.\n *\n * @param {Element} el\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction match(el, selector) {\n if (!el || el.nodeType !== 1) return false;\n if (vendor) return vendor.call(el, selector);\n var nodes = el.parentNode.querySelectorAll(selector);\n for (var i = 0; i < nodes.length; i++) {\n if (nodes[i] == el) return true;\n }\n return false;\n}\n","module.exports = throttle;\n\n/**\n * Returns a new function that, when invoked, invokes `func` at most once per `wait` milliseconds.\n *\n * @param {Function} func Function to wrap.\n * @param {Number} wait Number of milliseconds that must elapse between `func` invocations.\n * @return {Function} A new function that wraps the `func` function passed in.\n */\n\nfunction throttle (func, wait) {\n var ctx, args, rtn, timeoutID; // caching\n var last = 0;\n\n return function throttled () {\n ctx = this;\n args = arguments;\n var delta = new Date() - last;\n if (!timeoutID)\n if (delta >= wait) call();\n else timeoutID = setTimeout(call, wait - delta);\n return rtn;\n };\n\n function call () {\n timeoutID = 0;\n last = +new Date();\n rtn = func.apply(ctx, args);\n ctx = null;\n args = null;\n }\n}\n","module.exports = function parallel(fns, context, callback) {\n if (!callback) {\n if (typeof context === 'function') {\n callback = context\n context = null\n } else {\n callback = noop\n }\n }\n\n var pending = fns && fns.length\n if (!pending) return callback(null, []);\n\n var finished = false\n var results = new Array(pending)\n\n fns.forEach(context ? function (fn, i) {\n fn.call(context, maybeDone(i))\n } : function (fn, i) {\n fn(maybeDone(i))\n })\n\n function maybeDone(i) {\n return function (err, result) {\n if (finished) return;\n\n if (err) {\n callback(err, results)\n finished = true\n return\n }\n\n results[i] = result\n\n if (!--pending) callback(null, results);\n }\n }\n}\n\nfunction noop() {}\n","/**\n * Always returns a numeric value, given a value. Logic from jQuery's `isNumeric`.\n * @param {*} value Possibly numeric value.\n * @return {number} `value` or zero if `value` isn't numeric.\n */\nexport default function getNumber(value) {\n return parseFloat(value) || 0;\n}\n","import getNumber from './get-number';\n\nclass Point {\n /**\n * Represents a coordinate pair.\n * @param {number} [x=0] X.\n * @param {number} [y=0] Y.\n */\n constructor(x, y) {\n this.x = getNumber(x);\n this.y = getNumber(y);\n }\n\n /**\n * Whether two points are equal.\n * @param {Point} a Point A.\n * @param {Point} b Point B.\n * @return {boolean}\n */\n static equals(a, b) {\n return a.x === b.x && a.y === b.y;\n }\n}\n\nexport default Point;\n","export default class Rect {\n /**\n * Class for representing rectangular regions.\n * https://github.com/google/closure-library/blob/master/closure/goog/math/rect.js\n * @param {number} x Left.\n * @param {number} y Top.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} id Identifier\n * @constructor\n */\n constructor(x, y, w, h, id) {\n this.id = id;\n\n /** @type {number} */\n this.left = x;\n\n /** @type {number} */\n this.top = y;\n\n /** @type {number} */\n this.width = w;\n\n /** @type {number} */\n this.height = h;\n }\n\n /**\n * Returns whether two rectangles intersect.\n * @param {Rect} a A Rectangle.\n * @param {Rect} b A Rectangle.\n * @return {boolean} Whether a and b intersect.\n */\n static intersects(a, b) {\n return (\n a.left < b.left + b.width && b.left < a.left + a.width\n && a.top < b.top + b.height && b.top < a.top + a.height);\n }\n}\n","export default {\n BASE: 'shuffle',\n SHUFFLE_ITEM: 'shuffle-item',\n VISIBLE: 'shuffle-item--visible',\n HIDDEN: 'shuffle-item--hidden',\n};\n","import Point from './point';\nimport Classes from './classes';\n\nlet id = 0;\n\nclass ShuffleItem {\n constructor(element, isRTL) {\n id += 1;\n this.id = id;\n this.element = element;\n\n /**\n * Set correct direction of item\n */\n this.isRTL = isRTL;\n\n /**\n * Used to separate items for layout and shrink.\n */\n this.isVisible = true;\n\n /**\n * Used to determine if a transition will happen. By the time the _layout\n * and _shrink methods get the ShuffleItem instances, the `isVisible` value\n * has already been changed by the separation methods, so this property is\n * needed to know if the item was visible/hidden before the shrink/layout.\n */\n this.isHidden = false;\n }\n\n show() {\n this.isVisible = true;\n this.element.classList.remove(Classes.HIDDEN);\n this.element.classList.add(Classes.VISIBLE);\n this.element.removeAttribute('aria-hidden');\n }\n\n hide() {\n this.isVisible = false;\n this.element.classList.remove(Classes.VISIBLE);\n this.element.classList.add(Classes.HIDDEN);\n this.element.setAttribute('aria-hidden', true);\n }\n\n init() {\n this.addClasses([Classes.SHUFFLE_ITEM, Classes.VISIBLE]);\n this.applyCss(ShuffleItem.Css.INITIAL);\n this.applyCss(this.isRTL ? ShuffleItem.Css.DIRECTION.rtl : ShuffleItem.Css.DIRECTION.ltr);\n this.scale = ShuffleItem.Scale.VISIBLE;\n this.point = new Point();\n }\n\n addClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.add(className);\n });\n }\n\n removeClasses(classes) {\n classes.forEach((className) => {\n this.element.classList.remove(className);\n });\n }\n\n applyCss(obj) {\n Object.keys(obj).forEach((key) => {\n this.element.style[key] = obj[key];\n });\n }\n\n dispose() {\n this.removeClasses([\n Classes.HIDDEN,\n Classes.VISIBLE,\n Classes.SHUFFLE_ITEM,\n ]);\n\n this.element.removeAttribute('style');\n this.element = null;\n }\n}\n\nShuffleItem.Css = {\n INITIAL: {\n position: 'absolute',\n top: 0,\n visibility: 'visible',\n willChange: 'transform',\n },\n DIRECTION: {\n ltr: {\n left: 0,\n },\n rtl: {\n right: 0,\n },\n },\n VISIBLE: {\n before: {\n opacity: 1,\n visibility: 'visible',\n },\n after: {\n transitionDelay: '',\n },\n },\n HIDDEN: {\n before: {\n opacity: 0,\n },\n after: {\n visibility: 'hidden',\n transitionDelay: '',\n },\n },\n};\n\nShuffleItem.Scale = {\n VISIBLE: 1,\n HIDDEN: 0.001,\n};\n\nexport default ShuffleItem;\n","let value = null;\nexport default () => {\n if (value !== null) {\n return value;\n }\n\n const element = document.body || document.documentElement;\n const e = document.createElement('div');\n e.style.cssText = 'width:10px;padding:2px;box-sizing:border-box;';\n element.appendChild(e);\n\n value = window.getComputedStyle(e, null).width === '10px';\n\n element.removeChild(e);\n\n return value;\n};\n","import getNumber from './get-number';\nimport testComputedSize from './computed-size';\n\n/**\n * Retrieve the computed style for an element, parsed as a float.\n * @param {Element} element Element to get style for.\n * @param {string} style Style property.\n * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to\n * use instead of asking for them again.\n * @return {number} The parsed computed value or zero if that fails because IE\n * will return 'auto' when the element doesn't have margins instead of\n * the computed style.\n */\nexport default function getNumberStyle(\n element, style,\n styles = window.getComputedStyle(element, null),\n) {\n let value = getNumber(styles[style]);\n\n // Support IE<=11 and W3C spec.\n if (!testComputedSize() && style === 'width') {\n value += getNumber(styles.paddingLeft)\n + getNumber(styles.paddingRight)\n + getNumber(styles.borderLeftWidth)\n + getNumber(styles.borderRightWidth);\n } else if (!testComputedSize() && style === 'height') {\n value += getNumber(styles.paddingTop)\n + getNumber(styles.paddingBottom)\n + getNumber(styles.borderTopWidth)\n + getNumber(styles.borderBottomWidth);\n }\n\n return value;\n}\n","/**\n * Fisher-Yates shuffle.\n * http://stackoverflow.com/a/962890/373422\n * https://bost.ocks.org/mike/shuffle/\n * @param {Array} array Array to shuffle.\n * @return {Array} Randomly sorted array.\n */\nfunction randomize(array) {\n let n = array.length;\n\n while (n) {\n n -= 1;\n const i = Math.floor(Math.random() * (n + 1));\n const temp = array[i];\n array[i] = array[n];\n array[n] = temp;\n }\n\n return array;\n}\n\nconst defaults = {\n // Use array.reverse() to reverse the results\n reverse: false,\n\n // Sorting function\n by: null,\n\n // Custom sort function\n compare: null,\n\n // If true, this will skip the sorting and return a randomized order in the array\n randomize: false,\n\n // Determines which property of each item in the array is passed to the\n // sorting method.\n key: 'element',\n};\n\n/**\n * You can return `undefined` from the `by` function to revert to DOM order.\n * @param {Array} arr Array to sort.\n * @param {SortOptions} options Sorting options.\n * @return {Array}\n */\nexport default function sorter(arr, options) {\n // eslint-disable-next-line prefer-object-spread\n const opts = Object.assign({}, defaults, options);\n const original = Array.from(arr);\n let revert = false;\n\n if (!arr.length) {\n return [];\n }\n\n if (opts.randomize) {\n return randomize(arr);\n }\n\n // Sort the elements by the opts.by function.\n // If we don't have opts.by, default to DOM order\n if (typeof opts.by === 'function') {\n arr.sort((a, b) => {\n // Exit early if we already know we want to revert\n if (revert) {\n return 0;\n }\n\n const valA = opts.by(a[opts.key]);\n const valB = opts.by(b[opts.key]);\n\n // If both values are undefined, use the DOM order\n if (valA === undefined && valB === undefined) {\n revert = true;\n return 0;\n }\n\n if (valA < valB || valA === 'sortFirst' || valB === 'sortLast') {\n return -1;\n }\n\n if (valA > valB || valA === 'sortLast' || valB === 'sortFirst') {\n return 1;\n }\n\n return 0;\n });\n } else if (typeof opts.compare === 'function') {\n arr.sort(opts.compare);\n }\n\n // Revert to the original array if necessary\n if (revert) {\n return original;\n }\n\n if (opts.reverse) {\n arr.reverse();\n }\n\n return arr;\n}\n","const transitions = {};\nconst eventName = 'transitionend';\nlet count = 0;\n\nfunction uniqueId() {\n count += 1;\n return eventName + count;\n}\n\nexport function cancelTransitionEnd(id) {\n if (transitions[id]) {\n transitions[id].element.removeEventListener(eventName, transitions[id].listener);\n transitions[id] = null;\n return true;\n }\n\n return false;\n}\n\nexport function onTransitionEnd(element, callback) {\n const id = uniqueId();\n const listener = (evt) => {\n if (evt.currentTarget === evt.target) {\n cancelTransitionEnd(id);\n callback(evt);\n }\n };\n\n element.addEventListener(eventName, listener);\n\n transitions[id] = { element, listener };\n\n return id;\n}\n","export default function arrayMax(array) {\n return Math.max.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import Point from './point';\nimport Rect from './rect';\nimport arrayMax from './array-max';\nimport arrayMin from './array-min';\n\n/**\n * Determine the number of columns an items spans.\n * @param {number} itemWidth Width of the item.\n * @param {number} columnWidth Width of the column (includes gutter).\n * @param {number} columns Total number of columns\n * @param {number} threshold A buffer value for the size of the column to fit.\n * @return {number}\n */\nexport function getColumnSpan(itemWidth, columnWidth, columns, threshold) {\n let columnSpan = itemWidth / columnWidth;\n\n // If the difference between the rounded column span number and the\n // calculated column span number is really small, round the number to\n // make it fit.\n if (Math.abs(Math.round(columnSpan) - columnSpan) < threshold) {\n // e.g. columnSpan = 4.0089945390298745\n columnSpan = Math.round(columnSpan);\n }\n\n // Ensure the column span is not more than the amount of columns in the whole layout.\n return Math.min(Math.ceil(columnSpan), columns);\n}\n\n/**\n * Retrieves the column set to use for placement.\n * @param {number} columnSpan The number of columns this current item spans.\n * @param {number} columns The total columns in the grid.\n * @return {Array.} An array of numbers represeting the column set.\n */\nexport function getAvailablePositions(positions, columnSpan, columns) {\n // The item spans only one column.\n if (columnSpan === 1) {\n return positions;\n }\n\n // The item spans more than one column, figure out how many different\n // places it could fit horizontally.\n // The group count is the number of places within the positions this block\n // could fit, ignoring the current positions of items.\n // Imagine a 2 column brick as the second item in a 4 column grid with\n // 10px height each. Find the places it would fit:\n // [20, 10, 10, 0]\n // | | |\n // * * *\n //\n // Then take the places which fit and get the bigger of the two:\n // max([20, 10]), max([10, 10]), max([10, 0]) = [20, 10, 10]\n //\n // Next, find the first smallest number (the short column).\n // [20, 10, 10]\n // |\n // *\n //\n // And that's where it should be placed!\n //\n // Another example where the second column's item extends past the first:\n // [10, 20, 10, 0] => [20, 20, 10] => 10\n const available = [];\n\n // For how many possible positions for this item there are.\n for (let i = 0; i <= columns - columnSpan; i++) {\n // Find the bigger value for each place it could fit.\n available.push(arrayMax(positions.slice(i, i + columnSpan)));\n }\n\n return available;\n}\n\n/**\n * Find index of short column, the first from the left where this item will go.\n *\n * @param {Array.} positions The array to search for the smallest number.\n * @param {number} buffer Optional buffer which is very useful when the height\n * is a percentage of the width.\n * @return {number} Index of the short column.\n */\nexport function getShortColumn(positions, buffer) {\n const minPosition = arrayMin(positions);\n for (let i = 0, len = positions.length; i < len; i++) {\n if (positions[i] >= minPosition - buffer && positions[i] <= minPosition + buffer) {\n return i;\n }\n }\n\n return 0;\n}\n\n/**\n * Determine the location of the next item, based on its size.\n * @param {Object} itemSize Object with width and height.\n * @param {Array.} positions Positions of the other current items.\n * @param {number} gridSize The column width or row height.\n * @param {number} total The total number of columns or rows.\n * @param {number} threshold Buffer value for the column to fit.\n * @param {number} buffer Vertical buffer for the height of items.\n * @return {Point}\n */\nexport function getItemPosition({\n itemSize, positions, gridSize, total, threshold, buffer,\n}) {\n const span = getColumnSpan(itemSize.width, gridSize, total, threshold);\n const setY = getAvailablePositions(positions, span, total);\n const shortColumnIndex = getShortColumn(setY, buffer);\n\n // Position the item\n const point = new Point(gridSize * shortColumnIndex, setY[shortColumnIndex]);\n\n // Update the columns array with the new values for each column.\n // e.g. before the update the columns could be [250, 0, 0, 0] for an item\n // which spans 2 columns. After it would be [250, itemHeight, itemHeight, 0].\n const setHeight = setY[shortColumnIndex] + itemSize.height;\n for (let i = 0; i < span; i++) {\n positions[shortColumnIndex + i] = setHeight;\n }\n\n return point;\n}\n\n/**\n * This method attempts to center items. This method could potentially be slow\n * with a large number of items because it must place items, then check every\n * previous item to ensure there is no overlap.\n * @param {Array.} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Array.}\n */\nexport function getCenteredPositions(itemRects, containerWidth) {\n const rowMap = {};\n\n // Populate rows by their offset because items could jump between rows like:\n // a c\n // bbb\n itemRects.forEach((itemRect) => {\n if (rowMap[itemRect.top]) {\n // Push the point to the last row array.\n rowMap[itemRect.top].push(itemRect);\n } else {\n // Start of a new row.\n rowMap[itemRect.top] = [itemRect];\n }\n });\n\n // For each row, find the end of the last item, then calculate\n // the remaining space by dividing it by 2. Then add that\n // offset to the x position of each point.\n let rects = [];\n const rows = [];\n const centeredRows = [];\n Object.keys(rowMap).forEach((key) => {\n const itemRects = rowMap[key];\n rows.push(itemRects);\n const lastItem = itemRects[itemRects.length - 1];\n const end = lastItem.left + lastItem.width;\n const offset = Math.round((containerWidth - end) / 2);\n\n let finalRects = itemRects;\n let canMove = false;\n if (offset > 0) {\n const newRects = [];\n canMove = itemRects.every((r) => {\n const newRect = new Rect(r.left + offset, r.top, r.width, r.height, r.id);\n\n // Check all current rects to make sure none overlap.\n const noOverlap = !rects.some((r) => Rect.intersects(newRect, r));\n\n newRects.push(newRect);\n return noOverlap;\n });\n\n // If none of the rectangles overlapped, the whole group can be centered.\n if (canMove) {\n finalRects = newRects;\n }\n }\n\n // If the items are not going to be offset, ensure that the original\n // placement for this row will not overlap previous rows (row-spanning\n // elements could be in the way).\n if (!canMove) {\n let intersectingRect;\n const hasOverlap = itemRects.some((itemRect) => rects.some((r) => {\n const intersects = Rect.intersects(itemRect, r);\n if (intersects) {\n intersectingRect = r;\n }\n return intersects;\n }));\n\n // If there is any overlap, replace the overlapping row with the original.\n if (hasOverlap) {\n const rowIndex = centeredRows.findIndex((items) => items.includes(intersectingRect));\n centeredRows.splice(rowIndex, 1, rows[rowIndex]);\n }\n }\n\n rects = rects.concat(finalRects);\n centeredRows.push(finalRects);\n });\n\n // Reduce array of arrays to a single array of points.\n // https://stackoverflow.com/a/10865042/373422\n // Then reset sort back to how the items were passed to this method.\n // Remove the wrapper object with index, map to a Point.\n return [].concat.apply([], centeredRows) // eslint-disable-line prefer-spread\n .sort((a, b) => (a.id - b.id))\n .map((itemRect) => new Point(itemRect.left, itemRect.top));\n}\n","export default function arrayMin(array) {\n return Math.min.apply(Math, array); // eslint-disable-line prefer-spread\n}\n","import TinyEmitter from 'tiny-emitter';\nimport matches from 'matches-selector';\nimport throttle from 'throttleit';\nimport parallel from 'array-parallel';\n\nimport Point from './point';\nimport Rect from './rect';\nimport ShuffleItem from './shuffle-item';\nimport Classes from './classes';\nimport getNumberStyle from './get-number-style';\nimport sorter from './sorter';\nimport { onTransitionEnd, cancelTransitionEnd } from './on-transition-end';\nimport {\n getItemPosition,\n getColumnSpan,\n getAvailablePositions,\n getShortColumn,\n getCenteredPositions,\n} from './layout';\nimport arrayMax from './array-max';\nimport hyphenate from './hyphenate';\n\nfunction arrayUnique(x) {\n return Array.from(new Set(x));\n}\n\n// Used for unique instance variables\nlet id = 0;\n\nclass Shuffle extends TinyEmitter {\n /**\n * Categorize, sort, and filter a responsive grid of items.\n *\n * @param {Element} element An element which is the parent container for the grid items.\n * @param {Object} [options=Shuffle.options] Options object.\n * @constructor\n */\n constructor(element, options = {}) {\n super();\n // eslint-disable-next-line prefer-object-spread\n this.options = Object.assign({}, Shuffle.options, options);\n\n // Allow misspelling of delimiter since that's how it used to be.\n // Remove in v6.\n if (this.options.delimeter) {\n this.options.delimiter = this.options.delimeter;\n }\n\n this.lastSort = {};\n this.group = Shuffle.ALL_ITEMS;\n this.lastFilter = Shuffle.ALL_ITEMS;\n this.isEnabled = true;\n this.isDestroyed = false;\n this.isInitialized = false;\n this._transitions = [];\n this.isTransitioning = false;\n this._queue = [];\n\n const el = this._getElementOption(element);\n\n if (!el) {\n throw new TypeError('Shuffle needs to be initialized with an element.');\n }\n\n this.element = el;\n this.id = 'shuffle_' + id;\n id += 1;\n\n this._init();\n this.isInitialized = true;\n }\n\n _init() {\n this.items = this._getItems();\n\n this.options.sizer = this._getElementOption(this.options.sizer);\n\n // Add class and invalidate styles\n this.element.classList.add(Shuffle.Classes.BASE);\n\n // Set initial css for each item\n this._initItems(this.items);\n\n // Bind resize events\n this._onResize = this._getResizeFunction();\n window.addEventListener('resize', this._onResize);\n\n // If the page has not already emitted the `load` event, call layout on load.\n // This avoids layout issues caused by images and fonts loading after the\n // instance has been initialized.\n if (document.readyState !== 'complete') {\n const layout = this.layout.bind(this);\n window.addEventListener('load', function onLoad() {\n window.removeEventListener('load', onLoad);\n layout();\n });\n }\n\n // Get container css all in one request. Causes reflow\n const containerCss = window.getComputedStyle(this.element, null);\n const containerWidth = Shuffle.getSize(this.element).width;\n\n // Add styles to the container if it doesn't have them.\n this._validateStyles(containerCss);\n\n // We already got the container's width above, no need to cause another\n // reflow getting it again... Calculate the number of columns there will be\n this._setColumns(containerWidth);\n\n // Kick off!\n this.filter(this.options.group, this.options.initialSort);\n\n // The shuffle items haven't had transitions set on them yet so the user\n // doesn't see the first layout. Set them now that the first layout is done.\n // First, however, a synchronous layout must be caused for the previous\n // styles to be applied without transitions.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n this.setItemTransitions(this.items);\n this.element.style.transition = `height ${this.options.speed}ms ${this.options.easing}`;\n }\n\n /**\n * Returns a throttled and proxied function for the resize handler.\n * @return {function}\n * @private\n */\n _getResizeFunction() {\n const resizeFunction = this._handleResize.bind(this);\n return this.options.throttle\n ? this.options.throttle(resizeFunction, this.options.throttleTime)\n : resizeFunction;\n }\n\n /**\n * Retrieve an element from an option.\n * @param {string|jQuery|Element} option The option to check.\n * @return {?Element} The plain element or null.\n * @private\n */\n _getElementOption(option) {\n // If column width is a string, treat is as a selector and search for the\n // sizer element within the outermost container\n if (typeof option === 'string') {\n return this.element.querySelector(option);\n }\n\n // Check for an element\n if (option && option.nodeType && option.nodeType === 1) {\n return option;\n }\n\n // Check for jQuery object\n if (option && option.jquery) {\n return option[0];\n }\n\n return null;\n }\n\n /**\n * Ensures the shuffle container has the css styles it needs applied to it.\n * @param {Object} styles Key value pairs for position and overflow.\n * @private\n */\n _validateStyles(styles) {\n // Position cannot be static.\n if (styles.position === 'static') {\n this.element.style.position = 'relative';\n }\n\n // Overflow has to be hidden.\n if (styles.overflow !== 'hidden') {\n this.element.style.overflow = 'hidden';\n }\n }\n\n /**\n * Filter the elements by a category.\n * @param {string|string[]|function(Element):boolean} [category] Category to\n * filter by. If it's given, the last category will be used to filter the items.\n * @param {Array} [collection] Optionally filter a collection. Defaults to\n * all the items.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _filter(category = this.lastFilter, collection = this.items) {\n const set = this._getFilteredSets(category, collection);\n\n // Individually add/remove hidden/visible classes\n this._toggleFilterClasses(set);\n\n // Save the last filter in case elements are appended.\n this.lastFilter = category;\n\n // This is saved mainly because providing a filter function (like searching)\n // will overwrite the `lastFilter` property every time its called.\n if (typeof category === 'string') {\n this.group = category;\n }\n\n return set;\n }\n\n /**\n * Returns an object containing the visible and hidden elements.\n * @param {string|string[]|function(Element):boolean} category Category or function to filter by.\n * @param {ShuffleItem[]} items A collection of items to filter.\n * @return {{visible: ShuffleItem[], hidden: ShuffleItem[]}}\n * @private\n */\n _getFilteredSets(category, items) {\n let visible = [];\n const hidden = [];\n\n // category === 'all', add visible class to everything\n if (category === Shuffle.ALL_ITEMS) {\n visible = items;\n\n // Loop through each item and use provided function to determine\n // whether to hide it or not.\n } else {\n items.forEach((item) => {\n if (this._doesPassFilter(category, item.element)) {\n visible.push(item);\n } else {\n hidden.push(item);\n }\n });\n }\n\n return {\n visible,\n hidden,\n };\n }\n\n /**\n * Test an item to see if it passes a category.\n * @param {string|string[]|function():boolean} category Category or function to filter by.\n * @param {Element} element An element to test.\n * @return {boolean} Whether it passes the category/filter.\n * @private\n */\n _doesPassFilter(category, element) {\n if (typeof category === 'function') {\n return category.call(element, element, this);\n }\n\n // Check each element's data-groups attribute against the given category.\n const attr = element.getAttribute('data-' + Shuffle.FILTER_ATTRIBUTE_KEY);\n const keys = this.options.delimiter\n ? attr.split(this.options.delimiter)\n : JSON.parse(attr);\n\n function testCategory(category) {\n return keys.includes(category);\n }\n\n if (Array.isArray(category)) {\n if (this.options.filterMode === Shuffle.FilterMode.ANY) {\n return category.some(testCategory);\n }\n return category.every(testCategory);\n }\n\n return keys.includes(category);\n }\n\n /**\n * Toggles the visible and hidden class names.\n * @param {{visible, hidden}} Object with visible and hidden arrays.\n * @private\n */\n _toggleFilterClasses({ visible, hidden }) {\n visible.forEach((item) => {\n item.show();\n });\n\n hidden.forEach((item) => {\n item.hide();\n });\n }\n\n /**\n * Set the initial css for each item\n * @param {ShuffleItem[]} items Set to initialize.\n * @private\n */\n _initItems(items) {\n items.forEach((item) => {\n item.init();\n });\n }\n\n /**\n * Remove element reference and styles.\n * @param {ShuffleItem[]} items Set to dispose.\n * @private\n */\n _disposeItems(items) {\n items.forEach((item) => {\n item.dispose();\n });\n }\n\n /**\n * Updates the visible item count.\n * @private\n */\n _updateItemCount() {\n this.visibleItems = this._getFilteredItems().length;\n }\n\n /**\n * Sets css transform transition on a group of elements. This is not executed\n * at the same time as `item.init` so that transitions don't occur upon\n * initialization of a new Shuffle instance.\n * @param {ShuffleItem[]} items Shuffle items to set transitions on.\n * @protected\n */\n setItemTransitions(items) {\n const { speed, easing } = this.options;\n const positionProps = this.options.useTransforms ? ['transform'] : ['top', 'left'];\n\n // Allow users to transtion other properties if they exist in the `before`\n // css mapping of the shuffle item.\n const cssProps = Object.keys(ShuffleItem.Css.HIDDEN.before).map((k) => hyphenate(k));\n const properties = positionProps.concat(cssProps).join();\n\n items.forEach((item) => {\n item.element.style.transitionDuration = speed + 'ms';\n item.element.style.transitionTimingFunction = easing;\n item.element.style.transitionProperty = properties;\n });\n }\n\n _getItems() {\n return Array.from(this.element.children)\n .filter((el) => matches(el, this.options.itemSelector))\n .map((el) => new ShuffleItem(el, this.options.isRTL));\n }\n\n /**\n * Combine the current items array with a new one and sort it by DOM order.\n * @param {ShuffleItem[]} items Items to track.\n * @return {ShuffleItem[]}\n */\n _mergeNewItems(items) {\n const children = Array.from(this.element.children);\n return sorter(this.items.concat(items), {\n by(element) {\n return children.indexOf(element);\n },\n });\n }\n\n _getFilteredItems() {\n return this.items.filter((item) => item.isVisible);\n }\n\n _getConcealedItems() {\n return this.items.filter((item) => !item.isVisible);\n }\n\n /**\n * Returns the column size, based on column width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @param {number} gutterSize Size of the gutters.\n * @return {number}\n * @private\n */\n _getColumnSize(containerWidth, gutterSize) {\n let size;\n\n // If the columnWidth property is a function, then the grid is fluid\n if (typeof this.options.columnWidth === 'function') {\n size = this.options.columnWidth(containerWidth);\n\n // columnWidth option isn't a function, are they using a sizing element?\n } else if (this.options.sizer) {\n size = Shuffle.getSize(this.options.sizer).width;\n\n // if not, how about the explicitly set option?\n } else if (this.options.columnWidth) {\n size = this.options.columnWidth;\n\n // or use the size of the first item\n } else if (this.items.length > 0) {\n size = Shuffle.getSize(this.items[0].element, true).width;\n\n // if there's no items, use size of container\n } else {\n size = containerWidth;\n }\n\n // Don't let them set a column width of zero.\n if (size === 0) {\n size = containerWidth;\n }\n\n return size + gutterSize;\n }\n\n /**\n * Returns the gutter size, based on gutter width and sizer options.\n * @param {number} containerWidth Size of the parent container.\n * @return {number}\n * @private\n */\n _getGutterSize(containerWidth) {\n let size;\n if (typeof this.options.gutterWidth === 'function') {\n size = this.options.gutterWidth(containerWidth);\n } else if (this.options.sizer) {\n size = getNumberStyle(this.options.sizer, 'marginLeft');\n } else {\n size = this.options.gutterWidth;\n }\n\n return size;\n }\n\n /**\n * Calculate the number of columns to be used. Gets css if using sizer element.\n * @param {number} [containerWidth] Optionally specify a container width if\n * it's already available.\n */\n _setColumns(containerWidth = Shuffle.getSize(this.element).width) {\n const gutter = this._getGutterSize(containerWidth);\n const columnWidth = this._getColumnSize(containerWidth, gutter);\n let calculatedColumns = (containerWidth + gutter) / columnWidth;\n\n // Widths given from getStyles are not precise enough...\n if (Math.abs(Math.round(calculatedColumns) - calculatedColumns)\n < this.options.columnThreshold) {\n // e.g. calculatedColumns = 11.998876\n calculatedColumns = Math.round(calculatedColumns);\n }\n\n this.cols = Math.max(Math.floor(calculatedColumns || 0), 1);\n this.containerWidth = containerWidth;\n this.colWidth = columnWidth;\n }\n\n /**\n * Adjust the height of the grid\n */\n _setContainerSize() {\n this.element.style.height = this._getContainerSize() + 'px';\n }\n\n /**\n * Based on the column heights, it returns the biggest one.\n * @return {number}\n * @private\n */\n _getContainerSize() {\n return arrayMax(this.positions);\n }\n\n /**\n * Get the clamped stagger amount.\n * @param {number} index Index of the item to be staggered.\n * @return {number}\n */\n _getStaggerAmount(index) {\n return Math.min(index * this.options.staggerAmount, this.options.staggerAmountMax);\n }\n\n /**\n * Emit an event from this instance.\n * @param {string} name Event name.\n * @param {Object} [data={}] Optional object data.\n */\n _dispatch(name, data = {}) {\n if (this.isDestroyed) {\n return;\n }\n\n data.shuffle = this;\n this.emit(name, data);\n }\n\n /**\n * Zeros out the y columns array, which is used to determine item placement.\n * @private\n */\n _resetCols() {\n let i = this.cols;\n this.positions = [];\n while (i) {\n i -= 1;\n this.positions.push(0);\n }\n }\n\n /**\n * Loops through each item that should be shown and calculates the x, y position.\n * @param {ShuffleItem[]} items Array of items that will be shown/layed\n * out in order in their array.\n */\n _layout(items) {\n const itemPositions = this._getNextPositions(items);\n\n let count = 0;\n items.forEach((item, i) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.VISIBLE.after);\n }\n\n // If the item will not change its position, do not add it to the render\n // queue. Transitions don't fire when setting a property to the same value.\n if (Point.equals(item.point, itemPositions[i]) && !item.isHidden) {\n item.applyCss(ShuffleItem.Css.VISIBLE.before);\n callback();\n return;\n }\n\n item.point = itemPositions[i];\n item.scale = ShuffleItem.Scale.VISIBLE;\n item.isHidden = false;\n\n // Clone the object so that the `before` object isn't modified when the\n // transition delay is added.\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.VISIBLE.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Return an array of Point instances representing the future positions of\n * each item.\n * @param {ShuffleItem[]} items Array of sorted shuffle items.\n * @return {Point[]}\n * @private\n */\n _getNextPositions(items) {\n // If position data is going to be changed, add the item's size to the\n // transformer to allow for calculations.\n if (this.options.isCentered) {\n const itemsData = items.map((item, i) => {\n const itemSize = Shuffle.getSize(item.element, true);\n const point = this._getItemPosition(itemSize);\n return new Rect(point.x, point.y, itemSize.width, itemSize.height, i);\n });\n\n return this.getTransformedPositions(itemsData, this.containerWidth);\n }\n\n // If no transforms are going to happen, simply return an array of the\n // future points of each item.\n return items.map((item) => this._getItemPosition(Shuffle.getSize(item.element, true)));\n }\n\n /**\n * Determine the location of the next item, based on its size.\n * @param {{width: number, height: number}} itemSize Object with width and height.\n * @return {Point}\n * @private\n */\n _getItemPosition(itemSize) {\n return getItemPosition({\n itemSize,\n positions: this.positions,\n gridSize: this.colWidth,\n total: this.cols,\n threshold: this.options.columnThreshold,\n buffer: this.options.buffer,\n });\n }\n\n /**\n * Mutate positions before they're applied.\n * @param {Rect[]} itemRects Item data objects.\n * @param {number} containerWidth Width of the containing element.\n * @return {Point[]}\n * @protected\n */\n getTransformedPositions(itemRects, containerWidth) {\n return getCenteredPositions(itemRects, containerWidth);\n }\n\n /**\n * Hides the elements that don't match our filter.\n * @param {ShuffleItem[]} collection Collection to shrink.\n * @private\n */\n _shrink(collection = this._getConcealedItems()) {\n let count = 0;\n collection.forEach((item) => {\n function callback() {\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n }\n\n // Continuing would add a transitionend event listener to the element, but\n // that listener would not execute because the transform and opacity would\n // stay the same.\n // The callback is executed here because it is not guaranteed to be called\n // after the transitionend event because the transitionend could be\n // canceled if another animation starts.\n if (item.isHidden) {\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n callback();\n return;\n }\n\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n\n const styles = this.getStylesForTransition(item, ShuffleItem.Css.HIDDEN.before);\n styles.transitionDelay = this._getStaggerAmount(count) + 'ms';\n\n this._queue.push({\n item,\n styles,\n callback,\n });\n\n count += 1;\n });\n }\n\n /**\n * Resize handler.\n * @private\n */\n _handleResize() {\n // If shuffle is disabled, destroyed, don't do anything\n if (!this.isEnabled || this.isDestroyed) {\n return;\n }\n\n this.update();\n }\n\n /**\n * Returns styles which will be applied to the an item for a transition.\n * @param {ShuffleItem} item Item to get styles for. Should have updated\n * scale and point properties.\n * @param {Object} styleObject Extra styles that will be used in the transition.\n * @return {!Object} Transforms for transitions, left/top for animate.\n * @protected\n */\n getStylesForTransition(item, styleObject) {\n // Clone the object to avoid mutating the original.\n // eslint-disable-next-line prefer-object-spread\n const styles = Object.assign({}, styleObject);\n\n if (this.options.useTransforms) {\n const sign = this.options.isRTL ? '-' : '';\n const x = this.options.roundTransforms ? Math.round(item.point.x) : item.point.x;\n const y = this.options.roundTransforms ? Math.round(item.point.y) : item.point.y;\n styles.transform = `translate(${sign}${x}px, ${y}px) scale(${item.scale})`;\n } else {\n if (this.options.isRTL) {\n styles.right = item.point.x + 'px';\n } else {\n styles.left = item.point.x + 'px';\n }\n styles.top = item.point.y + 'px';\n }\n\n return styles;\n }\n\n /**\n * Listen for the transition end on an element and execute the itemCallback\n * when it finishes.\n * @param {Element} element Element to listen on.\n * @param {function} itemCallback Callback for the item.\n * @param {function} done Callback to notify `parallel` that this one is done.\n */\n _whenTransitionDone(element, itemCallback, done) {\n const id = onTransitionEnd(element, (evt) => {\n itemCallback();\n done(null, evt);\n });\n\n this._transitions.push(id);\n }\n\n /**\n * Return a function which will set CSS styles and call the `done` function\n * when (if) the transition finishes.\n * @param {Object} opts Transition object.\n * @return {function} A function to be called with a `done` function.\n */\n _getTransitionFunction(opts) {\n return (done) => {\n opts.item.applyCss(opts.styles);\n this._whenTransitionDone(opts.item.element, opts.callback, done);\n };\n }\n\n /**\n * Execute the styles gathered in the style queue. This applies styles to elements,\n * triggering transitions.\n * @private\n */\n _processQueue() {\n if (this.isTransitioning) {\n this._cancelMovement();\n }\n\n const hasSpeed = this.options.speed > 0;\n const hasQueue = this._queue.length > 0;\n\n if (hasQueue && hasSpeed && this.isInitialized) {\n this._startTransitions(this._queue);\n } else if (hasQueue) {\n this._styleImmediately(this._queue);\n this._dispatch(Shuffle.EventType.LAYOUT);\n\n // A call to layout happened, but none of the newly visible items will\n // change position or the transition duration is zero, which will not trigger\n // the transitionend event.\n } else {\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n // Remove everything in the style queue\n this._queue.length = 0;\n }\n\n /**\n * Wait for each transition to finish, the emit the layout event.\n * @param {Object[]} transitions Array of transition objects.\n */\n _startTransitions(transitions) {\n // Set flag that shuffle is currently in motion.\n this.isTransitioning = true;\n\n // Create an array of functions to be called.\n const callbacks = transitions.map((obj) => this._getTransitionFunction(obj));\n\n parallel(callbacks, this._movementFinished.bind(this));\n }\n\n _cancelMovement() {\n // Remove the transition end event for each listener.\n this._transitions.forEach(cancelTransitionEnd);\n\n // Reset the array.\n this._transitions.length = 0;\n\n // Show it's no longer active.\n this.isTransitioning = false;\n }\n\n /**\n * Apply styles without a transition.\n * @param {Object[]} objects Array of transition objects.\n * @private\n */\n _styleImmediately(objects) {\n if (objects.length) {\n const elements = objects.map((obj) => obj.item.element);\n\n Shuffle._skipTransitions(elements, () => {\n objects.forEach((obj) => {\n obj.item.applyCss(obj.styles);\n obj.callback();\n });\n });\n }\n }\n\n _movementFinished() {\n this._transitions.length = 0;\n this.isTransitioning = false;\n this._dispatch(Shuffle.EventType.LAYOUT);\n }\n\n /**\n * The magic. This is what makes the plugin 'shuffle'\n * @param {string|string[]|function(Element):boolean} [category] Category to filter by.\n * Can be a function, string, or array of strings.\n * @param {SortOptions} [sortOptions] A sort object which can sort the visible set\n */\n filter(category, sortOptions) {\n if (!this.isEnabled) {\n return;\n }\n\n if (!category || (category && category.length === 0)) {\n category = Shuffle.ALL_ITEMS; // eslint-disable-line no-param-reassign\n }\n\n this._filter(category);\n\n // Shrink each hidden item\n this._shrink();\n\n // How many visible elements?\n this._updateItemCount();\n\n // Update transforms on visible elements so they will animate to their new positions.\n this.sort(sortOptions);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {SortOptions} [sortOptions] The options object to pass to `sorter`.\n */\n sort(sortOptions = this.lastSort) {\n if (!this.isEnabled) {\n return;\n }\n\n this._resetCols();\n\n const items = sorter(this._getFilteredItems(), sortOptions);\n\n this._layout(items);\n\n // `_layout` always happens after `_shrink`, so it's safe to process the style\n // queue here with styles from the shrink method.\n this._processQueue();\n\n // Adjust the height of the container.\n this._setContainerSize();\n\n this.lastSort = sortOptions;\n }\n\n /**\n * Reposition everything.\n * @param {boolean} [isOnlyLayout=false] If true, column and gutter widths won't be recalculated.\n */\n update(isOnlyLayout = false) {\n if (this.isEnabled) {\n if (!isOnlyLayout) {\n // Get updated colCount\n this._setColumns();\n }\n\n // Layout items\n this.sort();\n }\n }\n\n /**\n * Use this instead of `update()` if you don't need the columns and gutters updated\n * Maybe an image inside `shuffle` loaded (and now has a height), which means calculations\n * could be off.\n */\n layout() {\n this.update(true);\n }\n\n /**\n * New items have been appended to shuffle. Mix them in with the current\n * filter or sort status.\n * @param {Element[]} newItems Collection of new items.\n */\n add(newItems) {\n const items = arrayUnique(newItems).map((el) => new ShuffleItem(el, this.options.isRTL));\n\n // Add classes and set initial positions.\n this._initItems(items);\n\n // Determine which items will go with the current filter.\n this._resetCols();\n\n const allItems = this._mergeNewItems(items);\n const sortedItems = sorter(allItems, this.lastSort);\n const allSortedItemsSet = this._filter(this.lastFilter, sortedItems);\n\n const isNewItem = (item) => items.includes(item);\n const applyHiddenState = (item) => {\n item.scale = ShuffleItem.Scale.HIDDEN;\n item.isHidden = true;\n item.applyCss(ShuffleItem.Css.HIDDEN.before);\n item.applyCss(ShuffleItem.Css.HIDDEN.after);\n };\n\n // Layout all items again so that new items get positions.\n // Synchonously apply positions.\n const itemPositions = this._getNextPositions(allSortedItemsSet.visible);\n allSortedItemsSet.visible.forEach((item, i) => {\n if (isNewItem(item)) {\n item.point = itemPositions[i];\n applyHiddenState(item);\n item.applyCss(this.getStylesForTransition(item, {}));\n }\n });\n\n allSortedItemsSet.hidden.forEach((item) => {\n if (isNewItem(item)) {\n applyHiddenState(item);\n }\n });\n\n // Cause layout so that the styles above are applied.\n this.element.offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Add transition to each item.\n this.setItemTransitions(items);\n\n // Update the list of items.\n this.items = this._mergeNewItems(items);\n\n // Update layout/visibility of new and old items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Disables shuffle from updating dimensions and layout on resize\n */\n disable() {\n this.isEnabled = false;\n }\n\n /**\n * Enables shuffle again\n * @param {boolean} [isUpdateLayout=true] if undefined, shuffle will update columns and gutters\n */\n enable(isUpdateLayout = true) {\n this.isEnabled = true;\n if (isUpdateLayout) {\n this.update();\n }\n }\n\n /**\n * Remove 1 or more shuffle items.\n * @param {Element[]} elements An array containing one or more\n * elements in shuffle\n * @return {Shuffle} The shuffle instance.\n */\n remove(elements) {\n if (!elements.length) {\n return;\n }\n\n const collection = arrayUnique(elements);\n\n const oldItems = collection\n .map((element) => this.getItemByElement(element))\n .filter((item) => !!item);\n\n const handleLayout = () => {\n this._disposeItems(oldItems);\n\n // Remove the collection in the callback\n collection.forEach((element) => {\n element.parentNode.removeChild(element);\n });\n\n this._dispatch(Shuffle.EventType.REMOVED, { collection });\n };\n\n // Hide collection first.\n this._toggleFilterClasses({\n visible: [],\n hidden: oldItems,\n });\n\n this._shrink(oldItems);\n\n this.sort();\n\n // Update the list of items here because `remove` could be called again\n // with an item that is in the process of being removed.\n this.items = this.items.filter((item) => !oldItems.includes(item));\n this._updateItemCount();\n\n this.once(Shuffle.EventType.LAYOUT, handleLayout);\n }\n\n /**\n * Retrieve a shuffle item by its element.\n * @param {Element} element Element to look for.\n * @return {?ShuffleItem} A shuffle item or undefined if it's not found.\n */\n getItemByElement(element) {\n return this.items.find((item) => item.element === element);\n }\n\n /**\n * Dump the elements currently stored and reinitialize all child elements which\n * match the `itemSelector`.\n */\n resetItems() {\n // Remove refs to current items.\n this._disposeItems(this.items);\n this.isInitialized = false;\n\n // Find new items in the DOM.\n this.items = this._getItems();\n\n // Set initial styles on the new items.\n this._initItems(this.items);\n\n this.once(Shuffle.EventType.LAYOUT, () => {\n // Add transition to each item.\n this.setItemTransitions(this.items);\n this.isInitialized = true;\n });\n\n // Lay out all items.\n this.filter(this.lastFilter);\n }\n\n /**\n * Destroys shuffle, removes events, styles, and classes\n */\n destroy() {\n this._cancelMovement();\n window.removeEventListener('resize', this._onResize);\n\n // Reset container styles\n this.element.classList.remove('shuffle');\n this.element.removeAttribute('style');\n\n // Reset individual item styles\n this._disposeItems(this.items);\n\n this.items.length = 0;\n this._transitions.length = 0;\n\n // Null DOM references\n this.options.sizer = null;\n this.element = null;\n\n // Set a flag so if a debounced resize has been triggered,\n // it can first check if it is actually isDestroyed and not doing anything\n this.isDestroyed = true;\n this.isEnabled = false;\n }\n\n /**\n * Returns the outer width of an element, optionally including its margins.\n *\n * There are a few different methods for getting the width of an element, none of\n * which work perfectly for all Shuffle's use cases.\n *\n * 1. getBoundingClientRect() `left` and `right` properties.\n * - Accounts for transform scaled elements, making it useless for Shuffle\n * elements which have shrunk.\n * 2. The `offsetWidth` property.\n * - This value stays the same regardless of the elements transform property,\n * however, it does not return subpixel values.\n * 3. getComputedStyle()\n * - This works great Chrome, Firefox, Safari, but IE<=11 does not include\n * padding and border when box-sizing: border-box is set, requiring a feature\n * test and extra work to add the padding back for IE and other browsers which\n * follow the W3C spec here.\n *\n * @param {Element} element The element.\n * @param {boolean} [includeMargins=false] Whether to include margins.\n * @return {{width: number, height: number}} The width and height.\n */\n static getSize(element, includeMargins = false) {\n // Store the styles so that they can be used by others without asking for it again.\n const styles = window.getComputedStyle(element, null);\n let width = getNumberStyle(element, 'width', styles);\n let height = getNumberStyle(element, 'height', styles);\n\n if (includeMargins) {\n const marginLeft = getNumberStyle(element, 'marginLeft', styles);\n const marginRight = getNumberStyle(element, 'marginRight', styles);\n const marginTop = getNumberStyle(element, 'marginTop', styles);\n const marginBottom = getNumberStyle(element, 'marginBottom', styles);\n width += marginLeft + marginRight;\n height += marginTop + marginBottom;\n }\n\n return {\n width,\n height,\n };\n }\n\n /**\n * Change a property or execute a function which will not have a transition\n * @param {Element[]} elements DOM elements that won't be transitioned.\n * @param {function} callback A function which will be called while transition\n * is set to 0ms.\n * @private\n */\n static _skipTransitions(elements, callback) {\n const zero = '0ms';\n\n // Save current duration and delay.\n const data = elements.map((element) => {\n const { style } = element;\n const duration = style.transitionDuration;\n const delay = style.transitionDelay;\n\n // Set the duration to zero so it happens immediately\n style.transitionDuration = zero;\n style.transitionDelay = zero;\n\n return {\n duration,\n delay,\n };\n });\n\n callback();\n\n // Cause forced synchronous layout.\n elements[0].offsetWidth; // eslint-disable-line no-unused-expressions\n\n // Put the duration back\n elements.forEach((element, i) => {\n element.style.transitionDuration = data[i].duration;\n element.style.transitionDelay = data[i].delay;\n });\n }\n}\n\nShuffle.ShuffleItem = ShuffleItem;\n\nShuffle.ALL_ITEMS = 'all';\nShuffle.FILTER_ATTRIBUTE_KEY = 'groups';\n\n/** @enum {string} */\nShuffle.EventType = {\n LAYOUT: 'shuffle:layout',\n REMOVED: 'shuffle:removed',\n};\n\n/** @enum {string} */\nShuffle.Classes = Classes;\n\n/** @enum {string} */\nShuffle.FilterMode = {\n ANY: 'any',\n ALL: 'all',\n};\n\n// Overrideable options\nShuffle.options = {\n // Initial filter group.\n group: Shuffle.ALL_ITEMS,\n\n // Transition/animation speed (milliseconds).\n speed: 250,\n\n // CSS easing function to use.\n easing: 'cubic-bezier(0.4, 0.0, 0.2, 1)',\n\n // e.g. '.picture-item'.\n itemSelector: '*',\n\n // Element or selector string. Use an element to determine the size of columns\n // and gutters.\n sizer: null,\n\n // A static number or function that tells the plugin how wide the gutters\n // between columns are (in pixels).\n gutterWidth: 0,\n\n // A static number or function that returns a number which tells the plugin\n // how wide the columns are (in pixels).\n columnWidth: 0,\n\n // If your group is not json, and is comma delimeted, you could set delimiter\n // to ','.\n delimiter: null,\n\n // Useful for percentage based heights when they might not always be exactly\n // the same (in pixels).\n buffer: 0,\n\n // Reading the width of elements isn't precise enough and can cause columns to\n // jump between values.\n columnThreshold: 0.01,\n\n // Shuffle can be isInitialized with a sort object. It is the same object\n // given to the sort method.\n initialSort: null,\n\n // By default, shuffle will throttle resize events. This can be changed or\n // removed.\n throttle,\n\n // How often shuffle can be called on resize (in milliseconds).\n throttleTime: 300,\n\n // Transition delay offset for each item in milliseconds.\n staggerAmount: 15,\n\n // Maximum stagger delay in milliseconds.\n staggerAmountMax: 150,\n\n // Whether to use transforms or absolute positioning.\n useTransforms: true,\n\n // Affects using an array with filter. e.g. `filter(['one', 'two'])`. With \"any\",\n // the element passes the test if any of its groups are in the array. With \"all\",\n // the element only passes if all groups are in the array.\n filterMode: Shuffle.FilterMode.ANY,\n\n // Attempt to center grid items in each row.\n isCentered: false,\n\n // Attempt to align grid items to right.\n isRTL: false,\n\n // Whether to round pixel values used in translate(x, y). This usually avoids\n // blurriness.\n roundTransforms: true,\n};\n\nShuffle.Point = Point;\nShuffle.Rect = Rect;\n\n// Expose for testing. Hack at your own risk.\nShuffle.__sorter = sorter;\nShuffle.__getColumnSpan = getColumnSpan;\nShuffle.__getAvailablePositions = getAvailablePositions;\nShuffle.__getShortColumn = getShortColumn;\nShuffle.__getCenteredPositions = getCenteredPositions;\n\nexport default Shuffle;\n","/**\n * Hyphenates a javascript style string to a css one. For example:\n * MozBoxSizing -> -moz-box-sizing.\n * @param {string} str The string to hyphenate.\n * @return {string} The hyphenated string.\n */\nexport default function hyphenate(str) {\n return str.replace(/([A-Z])/g, (str, m1) => 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\ No newline at end of file diff --git a/gulp/config.js b/gulp/config.js index b958072..d2f1bbd 100644 --- a/gulp/config.js +++ b/gulp/config.js @@ -1,6 +1,6 @@ -const babel = require('rollup-plugin-babel'); -const resolve = require('rollup-plugin-node-resolve'); -const commonjs = require('rollup-plugin-commonjs'); +const { babel } = require('@rollup/plugin-babel'); +const { nodeResolve } = require('@rollup/plugin-node-resolve'); +const commonjs = require('@rollup/plugin-commonjs'); const { terser } = require('rollup-plugin-terser'); const commonjsOptions = { @@ -33,11 +33,7 @@ module.exports.configs = [ format, }, cache: undefined, - plugins: [ - resolve(), - commonjs(commonjsOptions), - babel(babelOptions), - ], + plugins: [nodeResolve(), commonjs(commonjsOptions), babel(babelOptions)], }, { @@ -49,11 +45,7 @@ module.exports.configs = [ format: 'es', }, cache: undefined, - plugins: [ - resolve(), - commonjs(commonjsOptions), - babel(babelOptions), - ], + plugins: [nodeResolve(), commonjs(commonjsOptions), babel(babelOptions)], }, { @@ -65,12 +57,7 @@ module.exports.configs = [ format, }, cache: undefined, - plugins: [ - resolve(), - commonjs(commonjsOptions), - babel(babelOptions), - terser(minifyOptions), - ], + plugins: [nodeResolve(), commonjs(commonjsOptions), babel(babelOptions), terser(minifyOptions)], }, ]; diff --git a/package.json b/package.json index c6d92a5..de5c4ef 100644 --- a/package.json +++ b/package.json @@ -51,6 +51,9 @@ "devDependencies": { "@babel/core": "^7.4.5", "@babel/preset-env": "^7.4.5", + "@rollup/plugin-babel": "^5.3.0", + "@rollup/plugin-commonjs": "^17.1.0", + "@rollup/plugin-node-resolve": "^11.2.0", "autoprefixer": "^10.2.4", "cssnano": "^4.1.10", "eslint": "^7.5.0", @@ -61,10 +64,8 @@ "gulp-sass": "^4.0.0", "gulp-shell": "^0.8.0", "jest": "^26.1.0", + "postcss": "^8.2.8", "rollup": "^2.2.0", - "rollup-plugin-babel": "^4.0.3", - "rollup-plugin-commonjs": "^10.0.0", - "rollup-plugin-node-resolve": "^5.0.0", "rollup-plugin-terser": "^7.0.0", "sinon": "^9.0.0", "typescript": "^4.0.5"