148 lines
3.8 KiB
JavaScript
148 lines
3.8 KiB
JavaScript
const queryString = window.location.search;
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const urlParams = new URLSearchParams(queryString);
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if (urlParams.has('editor')) {
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var draw_layer;
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var polyline;
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var edit_active = 0;
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function resolve_latlng(latlng, recenter = 0) {
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var corr;
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if (recenter)
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corr = 0.5;
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else
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corr = 0;
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latlng.lng = Math.round(latlng.lng - 0.5) + corr;
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latlng.lat = Math.round(latlng.lat - 0.5) + corr;
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return latlng;
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}
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function start_editing(e) {
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// TODO: Check whether we already are in edit mode
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// TODO: Detect whether we are cloner to the tail or the head, and issue Fwd or Bwd accordingly
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if (polyline)
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polyline.editor.continueForward();
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else
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polyline = mymap.editTools.startPolyline();
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}
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function strToPoints(str) {
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var temp = JSON.parse("[" + str + "]"); // TODO: add .5 everwhere
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console.log(temp);
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return temp;
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}
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function onDragEnd(e) {
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var latlngs = polyline.getLatLngs();
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for (var i = 0; i < latlngs.length; i++) {
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latlngs[i] = resolve_latlng(latlngs[i], 1);
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}
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polyline.editor.refresh();
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polyline.editor.refreshVertexMarkers();
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location.hash = get_location_string();
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}
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function onLoad(interactive = 1) {
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if (interactive) {
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str = prompt("Instructions: \n" +
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"* Click the scribble-icon in the top left to start or continue drawing.\n" +
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"* Double click last waypoint to stop.\n" +
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"* Double click a waypoint to delete it.\n" +
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"* Click save in the top right to get the new string.\n\n" +
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"Enter existing waypoints in the following format: [x,y],[x,y]:", window.location.hash.slice(1));
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} else {
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str = window.location.hash.slice(1);
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}
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if (str) {
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coords = strToPoints(str);
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for (var i = 0; i < coords.length; i++) {
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coords[i] = [coords[i][1], coords[i][0]];
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}
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polyline = L.polyline(coords).addTo(mymap);
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// polyline.on('dragend', onDragEnd); // TODO: Doesn't work, see "workaround" below
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polyline.enableEdit();
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}
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}
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function onHashChange() {
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if (("#" + get_location_string()) != window.location.hash) {
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polyline.remove(mymap);
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onLoad(0);
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}
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}
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window.addEventListener("hashchange", onHashChange, false);
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window.addEventListener("mouseup", onDragEnd, false); // Workaround as polyline.on(dragend, ) doesn't seem to work
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// Configure map for better editing
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document.getElementById('mapid').classList.add("no-aa");
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mymap.setMaxZoom(14);
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mymap.off('click', onMapClick);
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//mymap.setOpacity(0.7);
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onLoad();
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function get_location_string() {
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var latlngs = polyline.getLatLngs();
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var str = "";
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for (var i = 0; i < latlngs.length; i++) {
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latlng = resolve_latlng(latlngs[i], 1);
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if (i != 0)
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str += ",";
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str += "[" + (latlng.lng - 0.5) + "," + (latlng.lat - 0.5) + "]";
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}
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return str;
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}
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function show_location_string(e) {
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prompt("Copy this string back into the Wiki and wait for a few hours:", get_location_string());
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}
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L.EditControl = L.Control.extend({
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options: {
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position: 'topleft',
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callback: null,
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kind: '',
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html: ''
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},
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onAdd: function (map) {
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var container = L.DomUtil.create('div', 'leaflet-control leaflet-bar'),
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link = L.DomUtil.create('a', '', container);
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link.href = '#';
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link.title = this.options.title;
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link.innerHTML = this.options.html;
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L.DomEvent.on(link, 'click', L.DomEvent.stop)
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.on(link, 'click', function () {
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window.LAYER = this.options.callback.call(map.editTools);
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}, this);
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return container;
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}
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});
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L.StartEditControl = L.EditControl.extend({
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options: {
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position: 'topleft',
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callback: start_editing,
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title: 'Start editing',
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html: '\\/\\'
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}
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});
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L.NewLineControl = L.EditControl.extend({
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options: {
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position: 'topleft',
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callback: show_location_string,
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title: 'Get location string',
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html: '💾'
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}
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});
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mymap.addControl(new L.NewLineControl());
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mymap.addControl(new L.StartEditControl());
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}
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