From 8962f8087bdfc3ec8497699a810638472a9fec2e Mon Sep 17 00:00:00 2001 From: Glen Cheney Date: Tue, 9 Apr 2019 22:33:04 -0700 Subject: [PATCH] Move to jest for testing (#278) * chore(package): update core-js to version 3.0.1 Closes #275 * move to jest --- .babelrc | 10 +- dist/shuffle.js | 16 +- dist/shuffle.js.map | 2 +- dist/shuffle.min.js | 2 +- dist/shuffle.min.js.map | 2 +- docs/dist/shuffle.js | 16 +- docs/dist/shuffle.js.map | 2 +- docs/dist/shuffle.min.js | 2 +- docs/dist/shuffle.min.js.map | 2 +- gulp/tasks/test.js | 19 +- jest.config.js | 26 + package.json | 32 +- src/shuffle.js | 2 +- test/{fixtures/regular.html => fixtures.js} | 17 + test/fixtures/delimiter.html | 12 - test/runner.html | 31 - test/test.js | 631 +++++++++----------- 17 files changed, 386 insertions(+), 438 deletions(-) create mode 100644 jest.config.js rename test/{fixtures/regular.html => fixtures.js} (54%) delete mode 100644 test/fixtures/delimiter.html delete mode 100644 test/runner.html diff --git a/.babelrc b/.babelrc index a29ac99..b5a939b 100644 --- a/.babelrc +++ b/.babelrc @@ -1,5 +1,13 @@ { "presets": [ - "@babel/preset-env" + [ + "@babel/preset-env", + { + "targets": { + "browsers": "> 1%, not dead, not IE < 11, not OperaMini all", + "node": "current" + } + } + ] ] } diff --git a/dist/shuffle.js b/dist/shuffle.js index 8ce63a2..4e746ec 100644 --- a/dist/shuffle.js +++ b/dist/shuffle.js @@ -138,6 +138,8 @@ }; var tinyEmitter = E; + var TinyEmitter = E; + tinyEmitter.TinyEmitter = TinyEmitter; var proto = typeof Element !== 'undefined' ? Element.prototype : {}; var vendor = proto.matches @@ -338,7 +340,7 @@ HIDDEN: 'shuffle-item--hidden' }; - var id$1 = 0; + var id = 0; var ShuffleItem = /*#__PURE__*/ @@ -346,8 +348,8 @@ function ShuffleItem(element) { _classCallCheck(this, ShuffleItem); - id$1 += 1; - this.id = id$1; + id += 1; + this.id = id; this.element = element; /** * Used to separate items for layout and shrink. @@ -865,7 +867,7 @@ } // Used for unique instance variables - var id$2 = 0; + var id$1 = 0; var Shuffle = /*#__PURE__*/ @@ -911,8 +913,8 @@ } _this.element = el; - _this.id = 'shuffle_' + id$2; - id$2 += 1; + _this.id = 'shuffle_' + id$1; + id$1 += 1; _this._init(); @@ -1321,7 +1323,7 @@ calculatedColumns = Math.round(calculatedColumns); } - this.cols = Math.max(Math.floor(calculatedColumns), 1); + this.cols = Math.max(Math.floor(calculatedColumns || 0), 1); this.containerWidth = containerWidth; this.colWidth = columnWidth; } diff --git a/dist/shuffle.js.map b/dist/shuffle.js.map index 38094ef..ed2bdf1 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;\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 'will-change': '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// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\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 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), 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 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 {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\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(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} [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.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 'will-change': '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// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\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 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 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 {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\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(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} [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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i=e.getAttribute("data-"+r.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===r.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(_.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 f(e,t.options.itemSelector)}).map(function(t){return new _(t)})}},{key:"_mergeNewItems",value:function(t){var e=Array.from(this.element.children);return T(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?r.getSize(this.options.sizer).width:this.options.columnWidth?this.options.columnWidth:this.items.length>0?r.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?b(this.options.sizer,"marginLeft"):this.options.gutterWidth}},{key:"_setColumns",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:r.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(_.Css.VISIBLE.after)}if(p.equals(t.point,i[s])&&!t.isHidden)return t.applyCss(_.Css.VISIBLE.before),void o();t.point=i[s],t.scale=_.Scale.VISIBLE,t.isHidden=!1;var r=e.getStylesForTransition(t,_.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=r.getSize(t.element,!0),s=e._getItemPosition(n);return new v(s.x,s.y,n.width,n.height,i)});return this.getTransformedPositions(i,this.containerWidth)}return t.map(function(t){return e._getItemPosition(r.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 p(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(_.Css.HIDDEN.after)}if(e.isHidden)return e.applyCss(_.Css.HIDDEN.before),void n();e.scale=_.Scale.HIDDEN,e.isHidden=!0;var s=t.getStylesForTransition(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(r.EventType.LAYOUT)):this._dispatch(r.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=d);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});r._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(r.EventType.LAYOUT)}},{key:"filter",value:function(t,e){this.isEnabled&&((!t||t&&0===t.length)&&(t=r.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=T(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 _(t)});this._initItems(i),this._resetCols();var n=T(this._mergeNewItems(i),this.lastSort),s=this._filter(this.lastFilter,n),o=function(t){return i.includes(t)},r=function(t){t.scale=_.Scale.HIDDEN,t.isHidden=!0,t.applyCss(_.Css.HIDDEN.before),t.applyCss(_.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(r.EventType.LAYOUT,function(){e._disposeItems(n),i.forEach(function(t){t.parentNode.removeChild(t)}),e._dispatch(r.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(r.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=b(t,"width",i),s=b(t,"height",i);e&&(n+=b(t,"marginLeft",i)+b(t,"marginRight",i),s+=b(t,"marginTop",i)+b(t,"marginBottom",i));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})}}]),r}();return H.ShuffleItem=_,H.ALL_ITEMS="all",H.FILTER_ATTRIBUTE_KEY="groups",H.EventType={LAYOUT:"shuffle:layout",REMOVED:"shuffle:removed"},H.Classes=y,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:c,throttleTime:300,staggerAmount:15,staggerAmountMax:150,useTransforms:!0,filterMode:H.FilterMode.ANY,isCentered:!1,roundTransforms:!0},H.Point=p,H.Rect=v,H.__sorter=T,H.__getColumnSpan=M,H.__getAvailablePositions=A,H.__getShortColumn=F,H.__getCenteredPositions=x,H}); //# sourceMappingURL=shuffle.min.js.map diff --git a/dist/shuffle.min.js.map b/dist/shuffle.min.js.map index 93e1faa..202e24f 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;\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 'will-change': '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// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\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 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), 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 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 {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\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(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} [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. 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 // 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 +{"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 'will-change': '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// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\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 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 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 {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\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(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} [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. 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 // 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/docs/dist/shuffle.js b/docs/dist/shuffle.js index 8ce63a2..4e746ec 100644 --- a/docs/dist/shuffle.js +++ b/docs/dist/shuffle.js @@ -138,6 +138,8 @@ }; var tinyEmitter = E; + var TinyEmitter = E; + tinyEmitter.TinyEmitter = TinyEmitter; var proto = typeof Element !== 'undefined' ? Element.prototype : {}; var vendor = proto.matches @@ -338,7 +340,7 @@ HIDDEN: 'shuffle-item--hidden' }; - var id$1 = 0; + var id = 0; var ShuffleItem = /*#__PURE__*/ @@ -346,8 +348,8 @@ function ShuffleItem(element) { _classCallCheck(this, ShuffleItem); - id$1 += 1; - this.id = id$1; + id += 1; + this.id = id; this.element = element; /** * Used to separate items for layout and shrink. @@ -865,7 +867,7 @@ } // Used for unique instance variables - var id$2 = 0; + var id$1 = 0; var Shuffle = /*#__PURE__*/ @@ -911,8 +913,8 @@ } _this.element = el; - _this.id = 'shuffle_' + id$2; - id$2 += 1; + _this.id = 'shuffle_' + id$1; + id$1 += 1; _this._init(); @@ -1321,7 +1323,7 @@ calculatedColumns = Math.round(calculatedColumns); } - this.cols = Math.max(Math.floor(calculatedColumns), 1); + this.cols = Math.max(Math.floor(calculatedColumns || 0), 1); this.containerWidth = containerWidth; this.colWidth = columnWidth; } diff --git a/docs/dist/shuffle.js.map b/docs/dist/shuffle.js.map index 38094ef..ed2bdf1 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;\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 'will-change': '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// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\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 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), 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 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 {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\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(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} [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.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 'will-change': '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// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\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 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 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 {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\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(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} [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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i=e.getAttribute("data-"+r.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===r.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(_.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 f(e,t.options.itemSelector)}).map(function(t){return new _(t)})}},{key:"_mergeNewItems",value:function(t){var e=Array.from(this.element.children);return T(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?r.getSize(this.options.sizer).width:this.options.columnWidth?this.options.columnWidth:this.items.length>0?r.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?b(this.options.sizer,"marginLeft"):this.options.gutterWidth}},{key:"_setColumns",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:r.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(_.Css.VISIBLE.after)}if(p.equals(t.point,i[s])&&!t.isHidden)return t.applyCss(_.Css.VISIBLE.before),void o();t.point=i[s],t.scale=_.Scale.VISIBLE,t.isHidden=!1;var r=e.getStylesForTransition(t,_.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=r.getSize(t.element,!0),s=e._getItemPosition(n);return new v(s.x,s.y,n.width,n.height,i)});return this.getTransformedPositions(i,this.containerWidth)}return t.map(function(t){return e._getItemPosition(r.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 p(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(_.Css.HIDDEN.after)}if(e.isHidden)return e.applyCss(_.Css.HIDDEN.before),void n();e.scale=_.Scale.HIDDEN,e.isHidden=!0;var s=t.getStylesForTransition(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(r.EventType.LAYOUT)):this._dispatch(r.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=d);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});r._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(r.EventType.LAYOUT)}},{key:"filter",value:function(t,e){this.isEnabled&&((!t||t&&0===t.length)&&(t=r.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=T(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 _(t)});this._initItems(i),this._resetCols();var n=T(this._mergeNewItems(i),this.lastSort),s=this._filter(this.lastFilter,n),o=function(t){return i.includes(t)},r=function(t){t.scale=_.Scale.HIDDEN,t.isHidden=!0,t.applyCss(_.Css.HIDDEN.before),t.applyCss(_.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(r.EventType.LAYOUT,function(){e._disposeItems(n),i.forEach(function(t){t.parentNode.removeChild(t)}),e._dispatch(r.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(r.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=b(t,"width",i),s=b(t,"height",i);e&&(n+=b(t,"marginLeft",i)+b(t,"marginRight",i),s+=b(t,"marginTop",i)+b(t,"marginBottom",i));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})}}]),r}();return H.ShuffleItem=_,H.ALL_ITEMS="all",H.FILTER_ATTRIBUTE_KEY="groups",H.EventType={LAYOUT:"shuffle:layout",REMOVED:"shuffle:removed"},H.Classes=y,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:c,throttleTime:300,staggerAmount:15,staggerAmountMax:150,useTransforms:!0,filterMode:H.FilterMode.ANY,isCentered:!1,roundTransforms:!0},H.Point=p,H.Rect=v,H.__sorter=T,H.__getColumnSpan=M,H.__getAvailablePositions=A,H.__getShortColumn=F,H.__getCenteredPositions=x,H}); //# sourceMappingURL=shuffle.min.js.map diff --git a/docs/dist/shuffle.min.js.map b/docs/dist/shuffle.min.js.map index 93e1faa..202e24f 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;\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 'will-change': '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// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\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 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), 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 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 {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\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(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} [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. 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 // 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 +{"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 'will-change': '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// You can return `undefined` from the `by` function to revert to DOM order.\nexport default function sorter(arr, options) {\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 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 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 {Object} [sortObj] A sort object which can sort the visible set\n */\n filter(category, sortObj) {\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(sortObj);\n }\n\n /**\n * Gets the visible elements, sorts them, and passes them to layout.\n * @param {Object} [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. 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 // 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/tasks/test.js b/gulp/tasks/test.js index 05cad6b..1d2b1d6 100644 --- a/gulp/tasks/test.js +++ b/gulp/tasks/test.js @@ -1,22 +1,9 @@ const gulp = require('gulp'); -const mochaPhantomJS = require('gulp-mocha-phantomjs'); -const config = require('../config'); +const shell = require('gulp-shell'); module.exports = function test() { - return gulp.src('test/runner.html', { + return gulp.src('package.json', { read: false, }) - .pipe(mochaPhantomJS({ - phantomjs: { - useColors: true, - }, - })) - - // https://github.com/gulpjs/gulp/issues/259#issuecomment-61976830 - .on('error', function onerror(err) { - if (config.watch) { - console.error(err.message); - this.emit('end'); - } - }); + .pipe(shell(['npx jest'])); }; diff --git a/jest.config.js b/jest.config.js new file mode 100644 index 0000000..d27210d --- /dev/null +++ b/jest.config.js @@ -0,0 +1,26 @@ +module.exports = { + // Automatically clear mock calls and instances between every test + clearMocks: true, + + // The directory where Jest should output its coverage files + coverageDirectory: 'coverage', + + // An array of regexp pattern strings used to skip coverage collection + coveragePathIgnorePatterns: [ + '/node_modules/', + '/test/', + ], + + // A list of reporter names that Jest uses when writing coverage reports + coverageReporters: [ + 'text', + 'lcov', + ], + + // An array of regexp pattern strings that are matched against all test paths, + // matched tests are skipped + testPathIgnorePatterns: [ + '/gulp/', + '/node_modules/', + ], +}; diff --git a/package.json b/package.json index e017ace..d2a0c8f 100644 --- a/package.json +++ b/package.json @@ -24,7 +24,7 @@ "gulp": "gulp", "build": "npm run gulp && npm run css", "serve": "gulp jekyll", - "test": "eslint src && gulp test", + "test": "eslint src && jest", "watch": "gulp watch" }, "repository": { @@ -46,30 +46,26 @@ "array-parallel": "^0.1.3", "matches-selector": "^1.0.0", "throttleit": "^1.0.0", - "tiny-emitter": "^2.0.1" + "tiny-emitter": "^2.1.0" }, "devDependencies": { - "@babel/core": "^7.1.6", - "@babel/preset-env": "^7.1.6", - "autoprefixer": "^9.1.2", - "chai": "^4.0.1", - "chai-dom": "^1.7.0", - "core-js": "^2.5.3", - "cssnano": "^4.0.5", - "eslint": "^5.9.0", + "@babel/core": "^7.4.3", + "@babel/preset-env": "^7.4.3", + "autoprefixer": "^9.5.1", + "cssnano": "^4.1.10", + "eslint": "^5.16.0", "eslint-config-airbnb-base": "^13.1.0", - "eslint-plugin-import": "^2.14.0", + "eslint-plugin-import": "^2.16.0", "gulp": "^4.0.0", - "gulp-mocha-phantomjs": "^0.12.2", "gulp-postcss": "^8.0.0", "gulp-sass": "^4.0.0", "gulp-shell": "^0.7.0", - "mocha": "^6.0.0", - "rollup": "^1.1.0", + "jest": "^24.7.1", + "rollup": "^1.9.1", "rollup-plugin-babel": "^4.0.3", - "rollup-plugin-commonjs": "^9.1.0", - "rollup-plugin-node-resolve": "^4.0.0", - "rollup-plugin-terser": "^4.0.2", - "sinon": "^7.1.1" + "rollup-plugin-commonjs": "^9.3.4", + "rollup-plugin-node-resolve": "^4.2.2", + "rollup-plugin-terser": "^4.0.4", + "sinon": "^7.3.1" } } diff --git a/src/shuffle.js b/src/shuffle.js index ba24d56..1a08c2b 100644 --- a/src/shuffle.js +++ b/src/shuffle.js @@ -436,7 +436,7 @@ class Shuffle extends TinyEmitter { calculatedColumns = Math.round(calculatedColumns); } - this.cols = Math.max(Math.floor(calculatedColumns), 1); + this.cols = Math.max(Math.floor(calculatedColumns || 0), 1); this.containerWidth = containerWidth; this.colWidth = columnWidth; } diff --git a/test/fixtures/regular.html b/test/fixtures.js similarity index 54% rename from test/fixtures/regular.html rename to test/fixtures.js index 2f29bf4..c42152b 100644 --- a/test/fixtures/regular.html +++ b/test/fixtures.js @@ -1,3 +1,4 @@ +export const regular = `
Person 1
Person 2
@@ -10,3 +11,19 @@
Person 9
Person 10
+`; + +export const delimiter = ` +
+
Person 1
+
Person 2
+
Person 3
+
Person 4
+
Person 5
+
Person 6
+
Person 7
+
Person 8
+
Person 9
+
Person 10
+
+` diff --git a/test/fixtures/delimiter.html b/test/fixtures/delimiter.html deleted file mode 100644 index 0072fc0..0000000 --- a/test/fixtures/delimiter.html +++ /dev/null @@ -1,12 +0,0 @@ -
-
Person 1
-
Person 2
-
Person 3
-
Person 4
-
Person 5
-
Person 6
-
Person 7
-
Person 8
-
Person 9
-
Person 10
-
diff --git a/test/runner.html b/test/runner.html deleted file mode 100644 index bf58f4d..0000000 --- a/test/runner.html +++ /dev/null @@ -1,31 +0,0 @@ - - - - Mocha Tests - - - -
- - - - - - - - - - - - - - - - - - - diff --git a/test/test.js b/test/test.js index af4b8bc..6398752 100644 --- a/test/test.js +++ b/test/test.js @@ -1,52 +1,19 @@ -/* globals describe, it, beforeEach, afterEach */ -/* jshint expr: true */ +import sinon from 'sinon'; -'use strict'; +import Shuffle from '../src/shuffle'; +import * as fixtures from './fixtures'; -var expect = window.chai.expect; -var sinon = window.sinon; - -describe('shuffle', function () { - - var Shuffle = window.Shuffle; - var fixtures = {}; - var fixture; - var instance; - - function getFixture(id) { - return new Promise(function (resolve, reject) { - var xhr = new XMLHttpRequest(); - xhr.onload = function () { - resolve(xhr.responseText); - }; - - xhr.onerror = reject; - - xhr.open('GET', 'fixtures/' + id + '.html'); - xhr.send(); - }); - } +describe('shuffle', () => { + let fixture = null; + let instance = null; function appendFixture(id) { - - function insert(content) { - content = content.trim(); - var holder = document.createElement('div'); - holder.innerHTML = content; - var element = holder.firstChild; - document.body.appendChild(element); - fixture = element; - } - - if (fixtures[id]) { - insert(fixtures[id]); - return Promise.resolve(); - } else { - return getFixture(id).then(function (html) { - fixtures[id] = html; - insert(html); - }); - } + const content = fixtures[id].trim(); + const holder = document.createElement('div'); + holder.innerHTML = content; + const element = holder.firstChild; + document.body.appendChild(element); + fixture = element; } function removeFixture() { @@ -58,8 +25,8 @@ describe('shuffle', function () { fixture.parentNode.removeChild(fixture); } - instance = null; fixture = null; + instance = null; } function id(id) { @@ -70,64 +37,64 @@ describe('shuffle', function () { setTimeout(done, 0); } - describe('regular fixture', function () { + describe('regular fixture', () => { - beforeEach(function (done) { + beforeEach(() => { // Mock the transition end event wrapper. sinon.stub(Shuffle.prototype, '_whenTransitionDone').callsFake(whenTransitionDoneStub); - appendFixture('regular').then(done); + appendFixture('regular'); }); - afterEach(function () { + afterEach(() => { Shuffle.prototype._whenTransitionDone.restore(); removeFixture(); }); - it('should have default options', function () { + it('should have default options', () => { instance = new Shuffle(fixture); - expect(instance.items.length).to.equal(10); - expect(instance.visibleItems).to.equal(10); - expect(instance.options.group).to.equal('all'); - expect(instance.options.speed).to.equal(250); - expect(instance.options.itemSelector).to.equal('*'); - expect(instance.options.sizer).to.equal(null); - expect(instance.options.columnWidth).to.equal(0); - expect(instance.options.gutterWidth).to.equal(0); - expect(instance.options.delimiter).to.equal(null); - expect(instance.options.initialSort).to.equal(null); - expect(instance.options.throttleTime).to.equal(300); - expect(instance.id).to.equal('shuffle_0'); - - expect(instance.isInitialized).to.be.true; - }); - - it('should add classes and default styles', function () { + expect(instance.items.length).toBe(10); + expect(instance.visibleItems).toBe(10); + expect(instance.options.group).toBe('all'); + expect(instance.options.speed).toBe(250); + expect(instance.options.itemSelector).toBe('*'); + expect(instance.options.sizer).toBeNull(); + expect(instance.options.columnWidth).toBe(0); + expect(instance.options.gutterWidth).toBe(0); + expect(instance.options.delimiter).toBeNull(); + expect(instance.options.initialSort).toBeNull(); + expect(instance.options.throttleTime).toBe(300); + expect(instance.id).toBe('shuffle_0'); + + expect(instance.isInitialized).toBe(true); + }); + + it('should add classes and default styles', () => { instance = new Shuffle(fixture); - expect(instance.element).to.have.class('shuffle'); - - var styles = window.getComputedStyle(instance.element, null); - expect(styles.position).to.equal('relative'); - expect(styles.overflow).to.equal('hidden'); - expect(instance.containerWidth).not.to.equal(0); - - instance.items.forEach(function (item) { - expect(item.element).to.have.class('shuffle-item'); - expect(item.element).to.have.class('shuffle-item--visible'); - expect(item.element.style.opacity).to.be.exist; - expect(item.element.style.position).to.equal('absolute'); - expect(item.element.style.visibility).to.equal('visible'); - expect(item.isVisible).to.equal(true); - expect(item.scale).to.equal(Shuffle.ShuffleItem.Scale.VISIBLE); - expect(item.point.x).to.be.exist; - expect(item.point.y).to.be.exist; + expect(instance.element.classList.contains('shuffle')).toBe(true); + + const styles = window.getComputedStyle(instance.element, null); + // Will have `position:relative` in a real browser (not JSDom). + expect(styles.overflow).toBe('hidden'); + // Will have a `containerWidth` > 0 in a real browser (not JSDom). + + instance.items.forEach(({ element, isVisible, scale, point }) => { + expect(element.classList.contains('shuffle-item')).toBe(true); + expect(element.classList.contains('shuffle-item--visible')).toBe(true); + expect(element.style.opacity).toBeDefined(); + expect(element.style.position).toBe('absolute'); + expect(element.style.visibility).toBe('visible'); + expect(isVisible).toBe(true); + expect(scale).toBe(Shuffle.ShuffleItem.Scale.VISIBLE); + expect(point.x).toBeDefined(); + expect(point.y).toBeDefined(); }); }); - it('should be 3 columns with gutters', function () { + it('should be 3 columns with gutters', () => { fixture.style.width = '1000px'; - for (var i = 0; i < fixture.children.length; i++) { + for (let i = 0; i < fixture.children.length; i++) { fixture.children[i].style.width = '300px'; fixture.children[i].style.height = '150px'; } @@ -137,41 +104,41 @@ describe('shuffle', function () { gutterWidth: 50, }); - expect(instance.colWidth).to.equal(350); - expect(instance.cols).to.equal(3); - expect(instance.positions).to.deep.equal([600, 450, 450]); + expect(instance.colWidth).toBe(350); + expect(instance.cols).toBe(3); + expect(instance.positions).toEqual([600, 450, 450]); }); - it('can have a function for columns and gutters', function () { + it('can have a function for columns and gutters', () => { fixture.style.width = '1000px'; - for (var i = 0; i < fixture.children.length; i++) { + for (let i = 0; i < fixture.children.length; i++) { fixture.children[i].style.width = '300px'; fixture.children[i].style.height = '150px'; } instance = new Shuffle(fixture, { - columnWidth: function (containerWidth) { - expect(containerWidth).to.equal(1000); + columnWidth(containerWidth) { + expect(containerWidth).toBe(1000); return 300; }, - gutterWidth: function () { + gutterWidth() { return 50; }, }); - expect(instance._getGutterSize(1000)).to.equal(50); - expect(instance._getColumnSize(1000, 50)).to.equal(350); - expect(instance.colWidth).to.equal(350); - expect(instance.cols).to.equal(3); - expect(instance.positions).to.deep.equal([600, 450, 450]); + expect(instance._getGutterSize(1000)).toBe(50); + expect(instance._getColumnSize(1000, 50)).toBe(350); + expect(instance.colWidth).toBe(350); + expect(instance.cols).toBe(3); + expect(instance.positions).toEqual([600, 450, 450]); }); - it('can have a function for columns/gutters and span multiple columns', function () { + it('can have a function for columns/gutters and span multiple columns', () => { fixture.style.width = '1200px'; - for (var i = 0; i < fixture.children.length; i++) { + for (let i = 0; i < fixture.children.length; i++) { fixture.children[i].style.width = '300px'; fixture.children[i].style.height = '10px'; } @@ -181,46 +148,42 @@ describe('shuffle', function () { fixture.children[6].style.width = '900px'; instance = new Shuffle(fixture, { - columnWidth: function (containerWidth) { - expect(containerWidth).to.equal(1200); + columnWidth(containerWidth) { + expect(containerWidth).toBe(1200); return 300; }, - gutterWidth: function () { + gutterWidth() { return 0; }, }); - expect(instance._getGutterSize(1200)).to.equal(0); - expect(instance._getColumnSize(1200, 0)).to.equal(300); - expect(instance.colWidth).to.equal(300); - expect(instance.cols).to.equal(4); - expect(instance.positions).to.deep.equal([40, 40, 30, 30]); + expect(instance._getGutterSize(1200)).toBe(0); + expect(instance._getColumnSize(1200, 0)).toBe(300); + expect(instance.colWidth).toBe(300); + expect(instance.cols).toBe(4); + expect(instance.positions).toEqual([40, 40, 30, 30]); }); - it('can filter by the data attribute', function (done) { + it('can filter by the data attribute', done => { instance = new Shuffle(fixture, { speed: 0, }); function second() { - expect(instance.visibleItems).to.equal(3); - var hidden = [3, 4, 5, 6, 7, 8, 10].map(function (num) { - return id('item' + num); - }); + expect(instance.visibleItems).toBe(3); + const hidden = [3, 4, 5, 6, 7, 8, 10].map(num => id(`item${num}`)); - var visible = [1, 2, 9].map(function (num) { - return id('item' + num); - }); + const visible = [1, 2, 9].map(num => id(`item${num}`)); - hidden.forEach(function (element) { - expect(element).to.have.class(Shuffle.Classes.HIDDEN); - expect(element.style.visibility).to.equal('hidden'); + hidden.forEach(element => { + expect(element.classList.contains(Shuffle.Classes.HIDDEN)).toBe(true); + expect(element.style.visibility).toBe('hidden'); }); - visible.forEach(function (element) { - expect(element).to.have.class(Shuffle.Classes.VISIBLE); - expect(element.style.visibility).to.equal('visible'); + visible.forEach(element => { + expect(element.classList.contains(Shuffle.Classes.VISIBLE)).toBe(true); + expect(element.style.visibility).toBe('visible'); }); instance.once(Shuffle.EventType.LAYOUT, third); @@ -230,23 +193,19 @@ describe('shuffle', function () { } function third() { - expect(instance.visibleItems).to.equal(2); - var hidden = [1, 2, 5, 6, 7, 8, 9, 10].map(function (num) { - return id('item' + num); - }); + expect(instance.visibleItems).toBe(2); + const hidden = [1, 2, 5, 6, 7, 8, 9, 10].map(num => id(`item${num}`)); - var visible = [3, 4].map(function (num) { - return id('item' + num); - }); + const visible = [3, 4].map(num => id(`item${num}`)); - hidden.forEach(function (element) { - expect(element).to.have.class(Shuffle.Classes.HIDDEN); - expect(element.style.visibility).to.equal('hidden'); + hidden.forEach(element => { + expect(element.classList.contains(Shuffle.Classes.HIDDEN)).toBe(true); + expect(element.style.visibility).toBe('hidden'); }); - visible.forEach(function (element) { - expect(element).to.have.class(Shuffle.Classes.VISIBLE); - expect(element.style.visibility).to.equal('visible'); + visible.forEach(element => { + expect(element.classList.contains(Shuffle.Classes.VISIBLE)).toBe(true); + expect(element.style.visibility).toBe('visible'); }); done(); @@ -256,18 +215,18 @@ describe('shuffle', function () { instance.filter('design'); }); - it('can initialize filtered and the category parameter is optional', function () { + it('can initialize filtered and the category parameter is optional', () => { instance = new Shuffle(fixture, { speed: 40, group: 'design', }); - expect(instance.visibleItems).to.equal(3); + expect(instance.visibleItems).toBe(3); }); - it('can initialize sorted', function () { - var sortObj = { - by: function (element) { + it('can initialize sorted', () => { + const sortObj = { + by(element) { return parseInt(element.getAttribute('data-age'), 10); }, }; @@ -277,33 +236,33 @@ describe('shuffle', function () { initialSort: sortObj, }); - expect(instance.lastSort).to.deep.equal(sortObj); + expect(instance.lastSort).toEqual(sortObj); }); - it('can calculate column spans', function () { + it('can calculate column spans', () => { // itemWidth, columnWidth, columns, threshold - expect(Shuffle.__getColumnSpan(50, 100, 3, 0)).to.equal(1); - expect(Shuffle.__getColumnSpan(200, 100, 3, 0)).to.equal(2); - expect(Shuffle.__getColumnSpan(200, 200, 3, 0)).to.equal(1); - expect(Shuffle.__getColumnSpan(300, 100, 3, 0)).to.equal(3); + expect(Shuffle.__getColumnSpan(50, 100, 3, 0)).toBe(1); + expect(Shuffle.__getColumnSpan(200, 100, 3, 0)).toBe(2); + expect(Shuffle.__getColumnSpan(200, 200, 3, 0)).toBe(1); + expect(Shuffle.__getColumnSpan(300, 100, 3, 0)).toBe(3); // Column span should not be larger than the number of columns. - expect(Shuffle.__getColumnSpan(300, 50, 3, 0)).to.equal(3); + expect(Shuffle.__getColumnSpan(300, 50, 3, 0)).toBe(3); // Fix for percentage values. - expect(Shuffle.__getColumnSpan(100.02, 100, 4, 0)).to.equal(2); - expect(Shuffle.__getColumnSpan(100.02, 100, 4, 0.01)).to.equal(1); - expect(Shuffle.__getColumnSpan(99.98, 100, 4, 0.01)).to.equal(1); + expect(Shuffle.__getColumnSpan(100.02, 100, 4, 0)).toBe(2); + expect(Shuffle.__getColumnSpan(100.02, 100, 4, 0.01)).toBe(1); + expect(Shuffle.__getColumnSpan(99.98, 100, 4, 0.01)).toBe(1); }); - it('can calculate column sets', function () { + it('can calculate column sets', () => { // getAvailablePositions(positions, columnSpan, columns) - var positions = [150, 0, 0, 0]; - expect(Shuffle.__getAvailablePositions(positions, 1, 4)).to.deep.equal([150, 0, 0, 0]); - expect(Shuffle.__getAvailablePositions(positions, 2, 4)).to.deep.equal([150, 0, 0]); + const positions = [150, 0, 0, 0]; + expect(Shuffle.__getAvailablePositions(positions, 1, 4)).toEqual([150, 0, 0, 0]); + expect(Shuffle.__getAvailablePositions(positions, 2, 4)).toEqual([150, 0, 0]); }); - it('can center already-positioned items', function() { + it('can center already-positioned items', () => { // 4-2-1 even heights expect(Shuffle.__getCenteredPositions([ new Shuffle.Rect(0, 0, 250, 100, 0), @@ -313,7 +272,7 @@ describe('shuffle', function () { new Shuffle.Rect(0, 100, 600, 100, 4), new Shuffle.Rect(600, 100, 300, 100, 5), new Shuffle.Rect(0, 200, 250, 100, 6), - ], 1000)).to.deep.equal([ + ], 1000)).toEqual([ new Shuffle.Point(0, 0), new Shuffle.Point(250, 0), new Shuffle.Point(500, 0), @@ -332,218 +291,214 @@ describe('shuffle', function () { new Shuffle.Rect(0, 0, 500, 200, 0), new Shuffle.Rect(500, 0, 250, 100, 1), new Shuffle.Rect(500, 100, 500, 100, 2), - ], 1000)).to.deep.equal([ + ], 1000)).toEqual([ new Shuffle.Point(0, 0), new Shuffle.Point(500, 0), new Shuffle.Point(500, 100), ]); }); - it('can get an element option', function () { + it('can get an element option', () => { instance = new Shuffle(fixture); - var first = fixture.firstElementChild; + const first = fixture.firstElementChild; - expect(instance._getElementOption(first)).to.equal(first); - expect(instance._getElementOption('#item1')).to.equal(first); - expect(instance._getElementOption('#hello-world')).to.be.null; - expect(instance._getElementOption(null)).to.be.null; - expect(instance._getElementOption(undefined)).to.be.null; - expect(instance._getElementOption(function () { - return first; - })).to.be.null; + expect(instance._getElementOption(first)).toBe(first); + expect(instance._getElementOption('#item1')).toBe(first); + expect(instance._getElementOption('#hello-world')).toBeNull(); + expect(instance._getElementOption(null)).toBeNull(); + expect(instance._getElementOption(undefined)).toBeNull(); + expect(instance._getElementOption(() => first)).toBeNull(); }); - it('can test elements against filters', function () { + it('can test elements against filters', () => { instance = new Shuffle(fixture); - var first = fixture.firstElementChild; - expect(instance._doesPassFilter('design', first)).to.be.true; - expect(instance._doesPassFilter('black', first)).to.be.false; + const first = fixture.firstElementChild; + expect(instance._doesPassFilter('design', first)).toBe(true); + expect(instance._doesPassFilter('black', first)).toBe(false); - expect(instance._doesPassFilter(function (element) { - expect(element).to.exist; + expect(instance._doesPassFilter(element => { + expect(element).toBeDefined(); return element.getAttribute('data-age') === '21'; - }, first)).to.equal(true); + }, first)).toBe(true); - expect(instance._doesPassFilter(function (element) { - return element.getAttribute('data-age') === '22'; - }, first)).to.equal(false); + expect(instance._doesPassFilter(element => element.getAttribute('data-age') === '22', first)).toBe(false); // Arrays. - expect(instance._doesPassFilter(['design'], first)).to.be.true; - expect(instance._doesPassFilter(['red'], first)).to.be.true; - expect(instance._doesPassFilter(['design', 'black'], first)).to.be.true; + expect(instance._doesPassFilter(['design'], first)).toBe(true); + expect(instance._doesPassFilter(['red'], first)).toBe(true); + expect(instance._doesPassFilter(['design', 'black'], first)).toBe(true); // Change filter mode. instance.options.filterMode = Shuffle.FilterMode.ALL; - expect(instance._doesPassFilter(['design'], first)).to.be.true; - expect(instance._doesPassFilter(['design', 'red'], first)).to.be.true; - expect(instance._doesPassFilter(['design', 'black'], first)).to.be.false; + expect(instance._doesPassFilter(['design'], first)).toBe(true); + expect(instance._doesPassFilter(['design', 'red'], first)).toBe(true); + expect(instance._doesPassFilter(['design', 'black'], first)).toBe(false); }); - it('will maintain the last sort object', function () { + it('will maintain the last sort object', () => { instance = new Shuffle(fixture); - var initialSort = instance.lastSort; + const initialSort = instance.lastSort; instance.sort(); - expect(instance.lastSort).to.deep.equal(initialSort); + expect(instance.lastSort).toEqual(initialSort); instance.sort({ glen: true }); - expect(instance.lastSort).to.deep.equal({ glen: true }); + expect(instance.lastSort).toEqual({ glen: true }); instance.sort(); - expect(instance.lastSort).to.deep.equal({ glen: true }); + expect(instance.lastSort).toEqual({ glen: true }); }); - it('should reset columns', function () { + it('should reset columns', () => { instance = new Shuffle(fixture); - expect(instance.cols).to.be.above(0); + // instance.cols will be > 0 in real browsers. instance._resetCols(); - var positions = new Array(instance.cols); - for (var i = 0; i < instance.cols; i++) { + const positions = new Array(instance.cols); + for (let i = 0; i < instance.cols; i++) { positions[i] = 0; } - expect(instance.positions).to.deep.equal(positions); + expect(instance.positions).toEqual(positions); }); - it('should destroy properly', function () { + it('should destroy properly', () => { instance = new Shuffle(fixture); instance.destroy(); - expect(instance.element).to.be.null; - expect(instance.items).to.have.lengthOf(0); - expect(instance.options.sizer).to.be.null; - expect(instance.isDestroyed).to.be.true; + expect(instance.element).toBeNull(); + expect(instance.items).toHaveLength(0); + expect(instance.options.sizer).toBeNull(); + expect(instance.isDestroyed).toBe(true); - expect(fixture).to.not.have.class('shuffle'); + expect(fixture.classList.contains('shuffle')).toBe(false); - Array.from(fixture.children).forEach(function (child) { - expect(child).to.not.have.class('shuffle-item'); - expect(child).to.not.have.class('shuffle-item--visible'); - expect(child).to.not.have.class('shuffle-item--hidden'); + Array.from(fixture.children).forEach(child => { + expect(child.classList.contains('shuffle-item')).toBe(false); + expect(child.classList.contains('shuffle-item--visible')).toBe(false); + expect(child.classList.contains('shuffle-item--hidden')).toBe(false); }); }); - it('should not update or shuffle when disabled or destroyed', function () { + it('should not update or shuffle when disabled or destroyed', () => { instance = new Shuffle(fixture); - var update = sinon.spy(instance, 'update'); - var _filter = sinon.spy(instance, '_filter'); + const update = sinon.spy(instance, 'update'); + const _filter = sinon.spy(instance, '_filter'); instance.disable(); instance.filter('design'); - expect(_filter.called).to.be.false; - expect(update.called).to.be.false; + expect(_filter.called).toBe(false); + expect(update.called).toBe(false); instance.enable(false); instance.destroy(); instance._onResize(); - expect(update.called).to.be.false; + expect(update.called).toBe(false); }); - it('should still update when the container is the same size', function () { + it('should still update when the container is the same size', () => { instance = new Shuffle(fixture); - var update = sinon.spy(instance, 'update'); + const update = sinon.spy(instance, 'update'); instance._onResize(); - expect(update.called).to.be.true; + expect(update.called).toBe(true); }); - describe('removing elements', function () { - var children; + describe('removing elements', () => { + let children; - beforeEach(function () { + beforeEach(() => { children = Array.from(fixture.children); }); - afterEach(function () { + afterEach(() => { children = null; }); - it('can remove items', function (done) { + it('can remove items', done => { instance = new Shuffle(fixture, { speed: 16, }); - instance.once(Shuffle.EventType.REMOVED, function (data) { - expect(data.shuffle.visibleItems).to.equal(8); - expect(data.collection[0].id).to.equal('item1'); - expect(data.collection[1].id).to.equal('item2'); - expect(data.shuffle.element.children).to.have.lengthOf(8); - expect(instance.isTransitioning).to.be.false; + instance.once(Shuffle.EventType.REMOVED, ({ shuffle, collection }) => { + expect(shuffle.visibleItems).toBe(8); + expect(collection[0].id).toBe('item1'); + expect(collection[1].id).toBe('item2'); + expect(shuffle.element.children).toHaveLength(8); + expect(instance.isTransitioning).toBe(false); done(); }); - var itemsToRemove = children.slice(0, 2); + const itemsToRemove = children.slice(0, 2); instance.remove(itemsToRemove); }); - it('can remove items without transforms', function (done) { + it('can remove items without transforms', done => { instance = new Shuffle(fixture, { speed: 100, useTransforms: false, }); - instance.once(Shuffle.EventType.REMOVED, function (data) { - expect(data.shuffle.visibleItems).to.equal(8); - expect(data.collection[0].id).to.equal('item2'); - expect(data.collection[1].id).to.equal('item3'); - expect(data.shuffle.element.children).to.have.lengthOf(8); - expect(data.shuffle.isTransitioning).to.be.false; + instance.once(Shuffle.EventType.REMOVED, ({ shuffle, collection }) => { + expect(shuffle.visibleItems).toBe(8); + expect(collection[0].id).toBe('item2'); + expect(collection[1].id).toBe('item3'); + expect(shuffle.element.children).toHaveLength(8); + expect(shuffle.isTransitioning).toBe(false); done(); }); - var itemsToRemove = children.slice(1, 3); + const itemsToRemove = children.slice(1, 3); instance.remove(itemsToRemove); }); }); - it('can get the real width of an element which is scaled', function () { - var div = document.createElement('div'); + it('can get the real width of an element which is scaled', () => { + const div = document.createElement('div'); div.style.cssText = 'width:100px;height:100px;'; div.style.transform = 'translate(0px,0px) scale(0.5)'; document.body.appendChild(div); - expect(Shuffle.getSize(div, false).width).to.equal(100); - expect(Shuffle.getSize(div, true).width).to.equal(100); + expect(Shuffle.getSize(div, false).width).toBe(100); + expect(Shuffle.getSize(div, true).width).toBe(100); - expect(Shuffle.getSize(div, false).height).to.equal(100); - expect(Shuffle.getSize(div, true).height).to.equal(100); + expect(Shuffle.getSize(div, false).height).toBe(100); + expect(Shuffle.getSize(div, true).height).toBe(100); div.style.marginLeft = '10px'; div.style.marginRight = '20px'; div.style.marginTop = '30px'; div.style.marginBottom = '40px'; - expect(Shuffle.getSize(div, false).width).to.equal(100); - expect(Shuffle.getSize(div, true).width).to.equal(130); + expect(Shuffle.getSize(div, false).width).toBe(100); + expect(Shuffle.getSize(div, true).width).toBe(130); - expect(Shuffle.getSize(div, false).height).to.equal(100); - expect(Shuffle.getSize(div, true).height).to.equal(170); + expect(Shuffle.getSize(div, false).height).toBe(100); + expect(Shuffle.getSize(div, true).height).toBe(170); document.body.removeChild(div); }); - describe('inserting elements', function () { - var items = []; + describe('inserting elements', () => { + const items = []; - beforeEach(function () { - var eleven = document.createElement('div'); + beforeEach(() => { + const eleven = document.createElement('div'); eleven.className = 'item'; eleven.setAttribute('data-age', 36); eleven.setAttribute('data-groups', '["ux", "black"]'); eleven.id = 'item11'; eleven.textContent = 'Person 11'; - var twelve = document.createElement('div'); + const twelve = document.createElement('div'); twelve.className = 'item'; twelve.setAttribute('data-age', 37); twelve.setAttribute('data-groups', '["strategy", "blue"]'); @@ -558,231 +513,229 @@ describe('shuffle', function () { }); }); - afterEach(function () { + afterEach(() => { items.length = 0; }); - it('can add items', function (done) { + it('can add items', done => { fixture.appendChild(items[0]); fixture.appendChild(items[1]); instance.add(items); // Already 2 in the items, plus number 11. - expect(instance.visibleItems).to.equal(3); - expect(instance.items).to.have.lengthOf(12); + expect(instance.visibleItems).toBe(3); + expect(instance.items).toHaveLength(12); - instance.once(Shuffle.EventType.LAYOUT, function () { + instance.once(Shuffle.EventType.LAYOUT, () => { done(); }); }); - it('can prepend items', function (done) { + it('can prepend items', done => { fixture.insertBefore(items[1], fixture.firstElementChild); fixture.insertBefore(items[0], fixture.firstElementChild); instance.add(items); - expect(instance.items[0].element).to.equal(items[0]); - expect(instance.items[1].element).to.equal(items[1]); - expect(instance.items).to.have.lengthOf(12); + expect(instance.items[0].element).toBe(items[0]); + expect(instance.items[1].element).toBe(items[1]); + expect(instance.items).toHaveLength(12); - instance.once(Shuffle.EventType.LAYOUT, function () { + instance.once(Shuffle.EventType.LAYOUT, () => { done(); }); }); - it('can reset items', function () { + it('can reset items', () => { fixture.textContent = ''; fixture.appendChild(items[0]); fixture.appendChild(items[1]); instance.resetItems(); - expect(instance.isInitialized).to.be.true; - expect(instance.items[0].element).to.equal(items[0]); - expect(instance.items[1].element).to.equal(items[1]); - expect(instance.items).to.have.lengthOf(2); + expect(instance.isInitialized).toBe(true); + expect(instance.items[0].element).toBe(items[0]); + expect(instance.items[1].element).toBe(items[1]); + expect(instance.items).toHaveLength(2); }); }); }); - describe('delimiter fixture', function () { - beforeEach(function (done) { + describe('delimiter fixture', () => { + beforeEach(() => { // Mock the transition end event wrapper. sinon.stub(Shuffle.prototype, '_whenTransitionDone').callsFake(whenTransitionDoneStub); - appendFixture('delimiter').then(done); + appendFixture('delimiter'); }); - afterEach(function () { + afterEach(() => { Shuffle.prototype._whenTransitionDone.restore(); removeFixture(); }); - it('can have a custom delimiter', function () { + it('can have a custom delimiter', () => { instance = new Shuffle(fixture, { delimiter: ',', group: 'design', }); - expect(instance.visibleItems).to.equal(3); + expect(instance.visibleItems).toBe(3); }); - it('can use the old misspelled delimiter option', function () { + it('can use the old misspelled delimiter option', () => { instance = new Shuffle(fixture, { delimeter: ',', group: 'design', }); - expect(instance.visibleItems).to.equal(3); + expect(instance.visibleItems).toBe(3); }); }); - describe('Custom shuffle item styles', function () { - var original = Shuffle.ShuffleItem.Css; + describe('Custom shuffle item styles', () => { + const original = Shuffle.ShuffleItem.Css; - beforeEach(function (done) { - appendFixture('regular').then(done); + beforeEach(() => { + appendFixture('regular'); }); - afterEach(function () { + afterEach(() => { Shuffle.ShuffleItem.Css = original; removeFixture(); }); - it('will apply before and after styles even if the item will not move', function () { + it('will apply before and after styles even if the item will not move', () => { Shuffle.ShuffleItem.Css.INITIAL.opacity = 0; instance = new Shuffle(fixture, { speed: 0 }); // The layout method will have already set styles to their 'after' states // upon initialization. Reset them here. - instance.items.forEach(function (item) { + instance.items.forEach(item => { item.applyCss(Shuffle.ShuffleItem.Css.INITIAL); }); - instance.items.forEach(function (item) { - expect(item.element.style.opacity).to.equal('0'); + instance.items.forEach(({ element }) => { + expect(element.style.opacity).toBe('0'); }); instance._layout(instance.items); instance._processQueue(); - instance.items.forEach(function (item) { - expect(item.element.style.opacity).to.equal('1'); + instance.items.forEach(({ element }) => { + expect(element.style.opacity).toBe('1'); }); }); }); - describe('the sorter', function () { - var items; - var clone; + describe('the sorter', () => { + let items; + let clone; - beforeEach(function (done) { - appendFixture('regular').then(function () { - items = Array.from(fixture.children).map(function (element) { - return { element: element }; - }); + beforeEach(() => { + appendFixture('regular'); - clone = Array.from(items); + items = Array.from(fixture.children).map(element => ({ + element + })); - done(); - }); + clone = Array.from(items); }); - afterEach(function () { + afterEach(() => { items.length = 0; clone.length = 0; removeFixture(); }); - it('will catch empty objects', function () { - expect(Shuffle.__sorter({})).to.deep.equal([]); + it('will catch empty objects', () => { + expect(Shuffle.__sorter({})).toEqual([]); }); - it('can randomize the elements', function () { - expect(items).to.have.lengthOf(10); - expect(Shuffle.__sorter(items)).to.deep.equal(items); + it('can randomize the elements', () => { + expect(items).toHaveLength(10); + expect(Shuffle.__sorter(items)).toEqual(items); - expect(Shuffle.__sorter(clone, { randomize: true })).to.not.deep.equal(items); + expect(Shuffle.__sorter(clone, { randomize: true })).not.toEqual(items); }); - it('can sort by a function', function () { - clone.sort(function (a, b) { - var age1 = parseInt(a.element.getAttribute('data-age'), 10); - var age2 = parseInt(b.element.getAttribute('data-age'), 10); + it('can sort by a function', () => { + clone.sort((a, b) => { + const age1 = parseInt(a.element.getAttribute('data-age'), 10); + const age2 = parseInt(b.element.getAttribute('data-age'), 10); return age1 - age2; }); - var result = Shuffle.__sorter(items, { - by: function (element) { - expect(element).to.exist; - expect(element.nodeType).to.equal(1); + const result = Shuffle.__sorter(items, { + by(element) { + expect(element).toBeDefined(); + expect(element.nodeType).toBe(1); return parseInt(element.getAttribute('data-age'), 10); }, }); - expect(result).to.deep.equal(clone); + expect(result).toEqual(clone); }); - it('can sort by a function and reverse it', function () { - clone.sort(function (a, b) { - var age1 = parseInt(a.element.getAttribute('data-age'), 10); - var age2 = parseInt(b.element.getAttribute('data-age'), 10); + it('can sort by a function and reverse it', () => { + clone.sort((a, b) => { + const age1 = parseInt(a.element.getAttribute('data-age'), 10); + const age2 = parseInt(b.element.getAttribute('data-age'), 10); return age1 - age2; }).reverse(); - var result = Shuffle.__sorter(items, { + const result = Shuffle.__sorter(items, { reverse: true, - by: function (element) { + by(element) { return parseInt(element.getAttribute('data-age'), 10); }, }); - expect(result).to.deep.equal(clone); + expect(result).toEqual(clone); }); - it('will revert to DOM order if the `by` function returns undefined', function () { - var count = 0; + it('will revert to DOM order if the `by` function returns undefined', () => { + let count = 0; expect(Shuffle.__sorter(items, { - by: function () { + by() { count++; return count < 5 ? Math.random() : undefined; }, - })).to.deep.equal(clone); + })).toEqual(clone); }); - it('can sort things to the top', function () { + it('can sort things to the top', () => { items = items.slice(0, 4); - var final = [items[1], items[0], items[3], items[2]]; + const final = [items[1], items[0], items[3], items[2]]; expect(Shuffle.__sorter(items, { - by: function (element) { - var age = parseInt(element.getAttribute('data-age'), 10); + by(element) { + const age = parseInt(element.getAttribute('data-age'), 10); if (age === 50) { return 'sortFirst'; } else { return age; } }, - })).to.deep.equal(final); + })).toEqual(final); }); - it('can sort things to the bottom', function () { + it('can sort things to the bottom', () => { items = items.slice(0, 4); - var final = [items[0], items[2], items[1], items[3]]; + const final = [items[0], items[2], items[1], items[3]]; expect(Shuffle.__sorter(items, { - by: function (element) { - var age = parseInt(element.getAttribute('data-age'), 10); + by(element) { + const age = parseInt(element.getAttribute('data-age'), 10); if (age === 27) { return 'sortLast'; } else { return age; } }, - })).to.deep.equal(final); + })).toEqual(final); }); - it('can have a custom sort comparator', function () { - var final = [ + it('can have a custom sort comparator', () => { + const final = [ clone[0], // design, 21 clone[8], // design, 28 clone[1], // design, 50 @@ -795,10 +748,10 @@ describe('shuffle', function () { clone[4], // ux, 35 ]; expect(Shuffle.__sorter(items, { - compare: function (a, b) { + compare(a, b) { // Sort by first group, then by age. - var groupA = JSON.parse(a.element.getAttribute('data-groups'))[0]; - var groupB = JSON.parse(b.element.getAttribute('data-groups'))[0]; + const groupA = JSON.parse(a.element.getAttribute('data-groups'))[0]; + const groupB = JSON.parse(b.element.getAttribute('data-groups'))[0]; if (groupA > groupB) { return 1; } @@ -807,11 +760,11 @@ describe('shuffle', function () { } // At this point, the group strings are the exact same. Test the age. - var ageA = parseInt(a.element.getAttribute('data-age'), 10); - var ageB = parseInt(b.element.getAttribute('data-age'), 10); + const ageA = parseInt(a.element.getAttribute('data-age'), 10); + const ageB = parseInt(b.element.getAttribute('data-age'), 10); return ageA - ageB; }, - })).to.deep.equal(final); + })).toEqual(final); }); });