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delphine |
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/*global L: true */
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L.GPX = L.FeatureGroup.extend({
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initialize: function(gpx, options) {
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L.Util.setOptions(this, options);
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this._gpx = gpx;
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this._layers = {};
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if (gpx) {
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this.addGPX(gpx, options, this.options.async);
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}
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},
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loadXML: function(url, cb, options, async) {
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if (async == undefined) async = this.options.async;
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if (options == undefined) options = this.options;
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var req = new window.XMLHttpRequest();
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req.open('GET', url, async);
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try {
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req.overrideMimeType('text/xml'); // unsupported by IE
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} catch(e) {}
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req.onreadystatechange = function() {
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if (req.readyState != 4) return;
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if(req.status == 200) cb(req.responseXML, options);
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};
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req.send(null);
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},
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addGPX: function(url, options, async) {
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var _this = this;
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var cb = function(gpx, options) { _this._addGPX(gpx, options) };
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this.loadXML(url, cb, options, async);
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},
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_addGPX: function(gpx, options) {
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var layers = this.parseGPX(gpx, options);
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if (!layers) return;
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this.addLayer(layers);
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this.fire("loaded");
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},
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parseGPX: function(xml, options) {
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var j, i, el, layers = [];
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var named = false, tags = [['rte','rtept'], ['trkseg','trkpt']];
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for (j = 0; j < tags.length; j++) {
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el = xml.getElementsByTagName(tags[j][0]);
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for (i = 0; i < el.length; i++) {
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var l = this.parse_trkseg(el[i], xml, options, tags[j][1]);
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for (var k = 0; k < l.length; k++) {
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if (this.parse_name(el[i], l[k])) named = true;
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layers.push(l[k]);
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}
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}
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}
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el = xml.getElementsByTagName('wpt');
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for (i = 0; i < el.length; i++) {
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var l = this.parse_wpt(el[i], xml, options);
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if (!l) continue;
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if (this.parse_name(el[i], l)) named = true;
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layers.push(l);
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}
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if (!layers.length) return;
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var layer = layers[0];
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if (layers.length > 1)
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layer = new L.FeatureGroup(layers);
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//if (!named) this.parse_name(xml, layer);
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return layer;
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},
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parse_name: function(xml, layer) {
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var i, el, name, descr="";
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el = xml.getElementsByTagName('name');
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if (el.length) name = el[0].childNodes[0].nodeValue;
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el = xml.getElementsByTagName('desc');
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for (i = 0; i < el.length; i++) {
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for (var j = 0; j < el[i].childNodes.length; j++)
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descr = descr + el[i].childNodes[j].nodeValue;
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}
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if (!name) return;
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var txt = "<h2>" + name + "</h2>" + descr;
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if (layer && layer._popup === undefined) layer.bindPopup(txt);
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return txt;
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},
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parse_trkseg: function(line, xml, options, tag) {
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var el = line.getElementsByTagName(tag);
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if (!el.length) return [];
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var coords = [];
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for (var i = 0; i < el.length; i++) {
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var ll = new L.LatLng(el[i].getAttribute('lat'),
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el[i].getAttribute('lon'));
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ll.meta = {};
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for (var j in el[i].childNodes) {
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var e = el[i].childNodes[j];
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if (!e.tagName) continue;
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ll.meta[e.tagName] = e.textContent;
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}
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coords.push(ll);
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}
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var l = [new L.Polyline(coords, options)];
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this.fire('addline', {line:l})
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return l;
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},
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parse_wpt: function(e, xml, options) {
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var m = new L.Marker(new L.LatLng(e.getAttribute('lat'),
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e.getAttribute('lon')), options);
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this.fire('addpoint', {point:m});
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return m;
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}
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});
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