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JavaScript

/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
var map = null;
var popup = null;
function createMap() {
if (maplibregl.supported()) {
$("#mapbox").css("display", "");
map = maplibreMap();
} else {
console.log("maplibre-gl not supported, disabling map");
$("#mapbox").css("display", "none");
app.dialog.alert("Your device does not support the 3D graphics needed to show the map.", "Unsupported Device");
}
}
function centerMapOnLocation(latitude, longitude) {
map.removeMarkers();
map.addMarker(latitude, longitude);
map.animateMapIn(latitude, longitude, 16);
}
/**
* Destroy and re-create the map.
* @returns {undefined}
*/
function reloadMap() {
try {
if (map != null && typeof map != 'undefined') {
map.off();
map.remove();
map = null;
createMap();
} else {
createMap();
}
} catch (ex) {
// oh well ¯\(°_o)/¯
console.log(ex);
$("#mapbox").css("display", "none");
app.dialog.alert("There was a problem loading the map. Error message: " + ex, "Error");
}
}
function setMapLocation(latitude, longitude) {
if (map == null) {
return;
}
map.setMapLocation(latitude, longitude);
}
function animateMapIn(latitude, longitude, zoom, heading) {
if (map == null) {
return;
}
if (typeof zoom == 'undefined') {
zoom = 1;
}
if (typeof heading == 'undefined') {
heading = 0;
}
map.animateMapIn(latitude, longitude, zoom, heading);
}
function showLocationPopup(latitude, longitude, words, accuracy) {
clearRectangle();
$("#location-info-words").text(words);
$("#location-info-coordlink").attr("href", "geo:" + (Math.round(latitude * 10000) / 10000) + "," + (Math.round(longitude * 10000) / 10000));
$("#location-info-coords").text((Math.round(latitude * 10000) / 10000) + ", " + (Math.round(longitude * 10000) / 10000));
$("#location-info-coordlink").css("visibility", "");
drawRectangle(
latitude - (accuracy / 2),
longitude - (accuracy / 2),
latitude + (accuracy / 2),
longitude + (accuracy / 2)
);
}
function drawRectangle(fromlat, fromlng, tolat, tolng) {
var geojson = {
'type': 'Feature',
'geometry': {
'type': 'Polygon',
'coordinates': [
[
[fromlng, fromlat],
[fromlng, tolat],
[tolng, tolat],
[tolng, fromlat],
[fromlng, fromlat]
]
]
}
};
if (typeof map.getSource("rectangle") == "undefined") {
map.addSource('rectangle', {
'type': 'geojson',
data: geojson
});
}
if (typeof map.getLayer('rectangle') == "undefined") {
map.addLayer({
'id': 'rectangle',
'type': 'fill',
'source': 'rectangle',
'layout': {},
'paint': {
'fill-color': '#088',
'fill-opacity': 0.5
}
});
}
map.getSource("rectangle").setData(geojson);
}
function clearRectangle() {
if (typeof map.getLayer("rectangle") != "undefined") {
map.removeLayer('rectangle');
}
}
function lookupAndShowCoords(latitude, longitude) {
var words = FixPhrase.encode(latitude, longitude);
map.flyTo({
center: {
lat: latitude,
lng: longitude
},
zoom: Math.max(map.getZoom(), 18)
});
showLocationPopup(latitude, longitude, words, 0.0001);
}