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