added new BingLayer code

WebContent/OSRM.config.js

@@ -79,15 +79,13 @@ OSRM.DEFAULTS = {
 		{
 			display_name: 'Bing Road',
 			apikey:'AjCb2f6Azv_xt9c6pl_xok96bgAYrXQNctnG4o07sTj4iS9N68Za4B3pRJyeCjGr',	// please use your own apikey (http://msdn.microsoft.com/en-us/library/ff428642.aspx) 
-			type:"Road",
-			options:{minZoom: 1},
+			options:{type:"Road", minZoom: 1},
 			bing:true,
 		},
 		{
 			display_name: 'Bing Aerial',
 			apikey:'AjCb2f6Azv_xt9c6pl_xok96bgAYrXQNctnG4o07sTj4iS9N68Za4B3pRJyeCjGr',	// please use your own apikey (http://msdn.microsoft.com/en-us/library/ff428642.aspx)
-			type:"Aerial",
-			options:{minZoom: 1},
+			options:{type:"Aerial", minZoom: 1},
 			bing:true,
 		}
 	],

WebContent/base/OSRM.Map.js

@@ -37,7 +37,7 @@ init: function() {
 	var base_maps = {};
 	for(var i=0, size=tile_servers.length; i<size; i++) {
 		if( tile_servers[i].bing == true ) {
-			base_maps[ tile_servers[i].display_name ] = new L.TileLayer.Bing( tile_servers[i].apikey, tile_servers[i].type, tile_servers[i].options );		
+			base_maps[ tile_servers[i].display_name ] = new L.BingLayer( tile_servers[i].apikey, tile_servers[i].options );		
 		} else {
 			tile_servers[i].options.attribution = tile_servers[i].attribution; 
 			base_maps[ tile_servers[i].display_name ] = new L.TileLayer( tile_servers[i].url, tile_servers[i].options );

WebContent/base/leaflet/L.TileLayer.Bing.js

@@ -1,3 +1,123 @@
+L.BingLayer = L.TileLayer.extend({
+	options: {
+		subdomains: [0, 1, 2, 3],
+		type: 'Aerial',
+		attribution: 'Bing',
+		culture: 'en-US'
+	},
+
+	initialize: function(key, options) {
+		L.Util.setOptions(this, options);
+
+		this._key = key;
+		this._url = null;
+		this.meta = {};
+		this.loadMetadata();
+	},
+
+	tile2quad: function(x, y, z) {
+		var quad = '';
+		for (var i = z; i > 0; i--) {
+			var digit = 0;
+			var mask = 1 << (i - 1);
+			if ((x & mask) != 0) digit += 1;
+			if ((y & mask) != 0) digit += 2;
+			quad = quad + digit;
+		}
+		return quad;
+	},
+
+	getTileUrl: function(p, z) {
+		var z = this._getZoomForUrl();
+		var subdomains = this.options.subdomains,
+			s = this.options.subdomains[(p.x + p.y) % subdomains.length];
+		return this._url.replace('{subdomain}', s)
+				.replace('{quadkey}', this.tile2quad(p.x, p.y, z))
+				.replace('{culture}', this.options.culture);
+	},
+
+	loadMetadata: function() {
+		var _this = this;
+		var cbid = '_bing_metadata_' + L.Util.stamp(this);
+		window[cbid] = function (meta) {
+			_this.meta = meta;
+			window[cbid] = undefined;
+			var e = document.getElementById(cbid);
+			e.parentNode.removeChild(e);
+			if (meta.errorDetails) {
+				alert("Got metadata" + meta.errorDetails);
+				return;
+			}
+			_this.initMetadata();
+		};
+		var url = "http://dev.virtualearth.net/REST/v1/Imagery/Metadata/" + this.options.type + "?include=ImageryProviders&jsonp=" + cbid + "&key=" + this._key;
+		var script = document.createElement("script");
+		script.type = "text/javascript";
+		script.src = url;
+		script.id = cbid;
+		document.getElementsByTagName("head")[0].appendChild(script);
+	},
+
+	initMetadata: function() {
+		var r = this.meta.resourceSets[0].resources[0];
+		this.options.subdomains = r.imageUrlSubdomains;
+		this._url = r.imageUrl;
+		this._providers = [];
+		for (var i = 0; i < r.imageryProviders.length; i++) {
+			var p = r.imageryProviders[i];
+			for (var j = 0; j < p.coverageAreas.length; j++) {
+				var c = p.coverageAreas[j];
+				var coverage = {zoomMin: c.zoomMin, zoomMax: c.zoomMax, active: false};
+				var bounds = new L.LatLngBounds(
+						new L.LatLng(c.bbox[0]+0.01, c.bbox[1]+0.01),
+						new L.LatLng(c.bbox[2]-0.01, c.bbox[3]-0.01)
+				);
+				coverage.bounds = bounds;
+				coverage.attrib = p.attribution;
+				this._providers.push(coverage);
+			}
+		}
+		this._update();
+	},
+
+	_update: function() {
+		if (this._url == null || !this._map) return;
+		this._update_attribution();
+		L.TileLayer.prototype._update.apply(this, []);
+	},
+
+	_update_attribution: function() {
+		var bounds = this._map.getBounds();
+		var zoom = this._map.getZoom();
+		for (var i = 0; i < this._providers.length; i++) {
+			var p = this._providers[i];
+			if ((zoom <= p.zoomMax && zoom >= p.zoomMin) &&
+					bounds.intersects(p.bounds)) {
+				if (!p.active)
+					this._map.attributionControl.addAttribution(p.attrib);
+				p.active = true;
+			} else {
+				if (p.active)
+					this._map.attributionControl.removeAttribution(p.attrib);
+				p.active = false;
+			}
+		}
+	},
+
+	onRemove: function(map) {
+		for (var i = 0; i < this._providers.length; i++) {
+			var p = this._providers[i];
+			if (p.active) {
+				this._map.attributionControl.removeAttribution(p.attrib);
+				p.active = false;
+			}
+		}
+        	L.TileLayer.prototype.onRemove.apply(this, [map]);
+	}
+});
+
+
+
 /* 
  * Portions of this code and logic copied from OpenLayers and
  * redistributed under the original Clear BSD license terms: