check-in bower_components

bower_components/leaflet-plugins/layer/vector/GPX.js

@@ -0,0 +1,143 @@
+/*global L: true */
+
+L.GPX = L.FeatureGroup.extend({
+	initialize: function(gpx, options) {
+		L.Util.setOptions(this, options);
+		this._gpx = gpx;
+		this._layers = {};
+		
+		if (gpx) {
+			this.addGPX(gpx, options, this.options.async);
+		}
+	},
+	
+	loadXML: function(url, cb, options, async) {
+		if (async == undefined) async = this.options.async;
+		if (options == undefined) options = this.options;
+
+		var req = new window.XMLHttpRequest();
+		req.open('GET', url, async);
+		try {
+			req.overrideMimeType('text/xml'); // unsupported by IE
+		} catch(e) {}
+		req.onreadystatechange = function() {
+			if (req.readyState != 4) return;
+			if(req.status == 200) cb(req.responseXML, options);
+		};
+		req.send(null);
+	},
+
+	_humanLen: function(l) {
+		if (l < 2000)
+			return l.toFixed(0) + " m";
+		else
+			return (l/1000).toFixed(1) + " km";
+	},
+	
+	_polylineLen: function(line)//line is a L.Polyline()
+	{
+		var ll = line._latlngs;
+		var d = 0, p = null;
+		for (var i = 0; i < ll.length; i++)
+		{
+			if(i && p)
+				d += p.distanceTo(ll[i]);
+			p = ll[i];
+		}
+		return d;
+	},
+
+	addGPX: function(url, options, async) {
+		var _this = this;
+		var cb = function(gpx, options) { _this._addGPX(gpx, options) };
+		this.loadXML(url, cb, options, async);
+	},
+
+	_addGPX: function(gpx, options) {
+		var layers = this.parseGPX(gpx, options);
+		if (!layers) return;
+		this.addLayer(layers);
+		this.fire("loaded");
+	},	
+
+	parseGPX: function(xml, options) {
+		var j, i, el, layers = [];
+		var named = false, tags = [['rte','rtept'], ['trkseg','trkpt']];
+
+		for (j = 0; j < tags.length; j++) {
+			el = xml.getElementsByTagName(tags[j][0]);
+			for (i = 0; i < el.length; i++) {
+				var l = this.parse_trkseg(el[i], xml, options, tags[j][1]);
+				for (var k = 0; k < l.length; k++) {
+					if (this.parse_name(el[i], l[k])) named = true;
+					layers.push(l[k]);
+				}
+			}
+		}
+
+		el = xml.getElementsByTagName('wpt');
+		if (options.display_wpt != false) {
+			for (i = 0; i < el.length; i++) {
+				var l = this.parse_wpt(el[i], xml, options);
+				if (!l) continue;
+				if (this.parse_name(el[i], l)) named = true;
+				layers.push(l);
+			}
+		}
+
+		if (!layers.length) return;
+		var layer = layers[0];
+		if (layers.length > 1) 
+			layer = new L.FeatureGroup(layers);
+		if (!named) this.parse_name(xml, layer);
+		return layer;
+	},
+
+	parse_name: function(xml, layer) {
+		var i, el, txt="", name, descr="", len=0;
+		el = xml.getElementsByTagName('name');
+		if (el.length)
+			name = el[0].childNodes[0].nodeValue;
+		el = xml.getElementsByTagName('desc');
+		for (i = 0; i < el.length; i++) {
+			for (var j = 0; j < el[i].childNodes.length; j++)
+				descr = descr + el[i].childNodes[j].nodeValue;
+		}
+
+		if(layer instanceof L.Path)
+			len = this._polylineLen(layer);
+
+		if (name) txt += "<h2>" + name + "</h2>" + descr;
+		if (len) txt += "<p>" + this._humanLen(len) + "</p>";
+		
+		if (layer && layer._popup === undefined) layer.bindPopup(txt);
+		return txt;
+	},
+
+	parse_trkseg: function(line, xml, options, tag) {
+		var el = line.getElementsByTagName(tag);
+		if (!el.length) return [];
+		var coords = [];
+		for (var i = 0; i < el.length; i++) {
+			var ll = new L.LatLng(el[i].getAttribute('lat'),
+						el[i].getAttribute('lon'));
+			ll.meta = {};
+			for (var j in el[i].childNodes) {
+				var e = el[i].childNodes[j];
+				if (!e.tagName) continue;
+				ll.meta[e.tagName] = e.textContent;
+			}
+			coords.push(ll);
+		}
+		var l = [new L.Polyline(coords, options)];
+		this.fire('addline', {line:l})
+		return l;
+	},
+
+	parse_wpt: function(e, xml, options) {
+		var m = new L.Marker(new L.LatLng(e.getAttribute('lat'),
+						e.getAttribute('lon')), options);
+		this.fire('addpoint', {point:m});
+		return m;
+	}
+});