Canvas events fixes (fix #3915)

- fix fireEvent called for each layer containing event point
- fix layer not removed from this._layer at remove
- fix L.DomEvent.stop(e) not honoured for canvas because events
  are both listenned on canvas container and map container

spec/index.html

@@ -77,6 +77,7 @@
 	<script type="text/javascript" src="suites/layer/vector/PolygonSpec.js"></script>
 	<script type="text/javascript" src="suites/layer/vector/PolylineSpec.js"></script>
 	<script type="text/javascript" src="suites/layer/vector/PolylineGeometrySpec.js"></script>
+	<script type="text/javascript" src="suites/layer/vector/CanvasSpec.js"></script>
 
 	<!-- /map -->
 	<script type="text/javascript" src="suites/map/MapSpec.js"></script>

spec/suites/layer/vector/CanvasSpec.js

@@ -0,0 +1,78 @@
+describe('Canvas', function () {
+
+	var c, map, p2ll, latLngs;
+
+	before(function () {
+		c = document.createElement('div');
+		c.style.width = '400px';
+		c.style.height = '400px';
+		c.style.position = 'absolute';
+		c.style.top = '0';
+		c.style.left = '0';
+		document.body.appendChild(c);
+		map = new L.Map(c, {preferCanvas: true, zoomControl: false});
+		map.setView([0, 0], 6);
+		p2ll = function (x, y) {
+			return map.layerPointToLatLng([x, y]);
+		};
+		latLngs = [p2ll(0, 0), p2ll(0, 100), p2ll(100, 100), p2ll(100, 0)];
+	});
+
+	after(function () {
+		document.body.removeChild(c);
+	});
+
+	describe("#events", function () {
+		var layer;
+
+		beforeEach(function () {
+			layer = L.polygon(latLngs).addTo(map);
+		});
+
+		afterEach(function () {
+			layer.remove();
+		});
+
+		it("should fire event when layer contains mouse", function () {
+			var spy = sinon.spy();
+			layer.on('click', spy);
+			happen.at('click', 50, 50);  // Click on the layer.
+			expect(spy.callCount).to.eql(1);
+			happen.at('click', 150, 150);  // Click outside layer.
+			expect(spy.callCount).to.eql(1);
+			layer.off("click", spy);
+		});
+
+		it("DOM events propagate from canvas polygon to map", function () {
+			var spy = sinon.spy();
+			map.on("click", spy);
+			happen.at('click', 50, 50);
+			expect(spy.callCount).to.eql(1);
+			map.off("click", spy);
+		});
+
+		it("DOM events fired on canvas polygon can be cancelled before being caught by the map", function () {
+			var mapSpy = sinon.spy();
+			var layerSpy = sinon.spy();
+			map.on("click", mapSpy);
+			layer.on("click", L.DomEvent.stopPropagation).on("click", layerSpy);
+			happen.at('click', 50, 50);
+			expect(layerSpy.callCount).to.eql(1);
+			expect(mapSpy.callCount).to.eql(0);
+			map.off("click", mapSpy);
+			layer.off("click", L.DomEvent.stopPropagation).off("click", layerSpy);
+		});
+
+		it("DOM events fired on canvas polygon are propagated only once to the map even when two layers contains the event", function () {
+			var spy = sinon.spy();
+			var layer2 = L.polygon(latLngs).addTo(map);
+			map.on("click", spy);
+			happen.at('click', 50, 50);
+			expect(spy.callCount).to.eql(1);
+			layer2.remove();
+			map.off("click", spy);
+		});
+
+	});
+
+});

spec/suites/map/MapSpec.js

@@ -644,14 +644,6 @@ describe("Map", function () {
 			expect(spy.calledOnce).to.be.ok();
 		});
 
-		it("DOM events propagate from canvas polygon to map", function () {
-			var spy = sinon.spy();
-			map.on("mousemove", spy);
-			var layer = new L.Polygon([[1, 2], [3, 4], [5, 6]], {rendered: L.canvas()}).addTo(map);
-			happen.mousemove(layer._path);
-			expect(spy.calledOnce).to.be.ok();
-		});
-
 		it("DOM events propagate from marker to map", function () {
 			var spy = sinon.spy();
 			map.on("mousemove", spy);
@@ -682,17 +674,6 @@ describe("Map", function () {
 			expect(mapSpy.called).not.to.be.ok();
 		});
 
-		it("DOM events fired on canvas polygon can be cancelled before being caught by the map", function () {
-			var mapSpy = sinon.spy();
-			var layerSpy = sinon.spy();
-			map.on("mousemove", mapSpy);
-			var layer = new L.Polygon([[1, 2], [3, 4], [5, 6]], {rendered: L.canvas()}).addTo(map);
-			layer.on("mousemove", L.DomEvent.stopPropagation).on("mousemove", layerSpy);
-			happen.mousemove(layer._path);
-			expect(layerSpy.calledOnce).to.be.ok();
-			expect(mapSpy.called).not.to.be.ok();
-		});
-
 		it("mouseout is forwarded if fired on the original target", function () {
 			var mapSpy = sinon.spy(),
 			    layerSpy = sinon.spy(),

src/layer/vector/Canvas.js

@@ -61,6 +61,7 @@ L.Canvas = L.Renderer.extend({
 
 	_removePath: function (layer) {
 		layer._removed = true;
+		delete this._layers[L.stamp(layer)];
 		this._requestRedraw(layer);
 	},
 
@@ -201,14 +202,17 @@ L.Canvas = L.Renderer.extend({
 	// so we emulate that by calculating what's under the mouse on mousemove/click manually
 
 	_onClick: function (e) {
-		var point = this._map.mouseEventToLayerPoint(e);
+		var point = this._map.mouseEventToLayerPoint(e), layers = [];
 
 		for (var id in this._layers) {
 			if (this._layers[id]._containsPoint(point)) {
 				L.DomEvent._fakeStop(e);
-				this._fireEvent(this._layers[id], e);
+				layers.push(this._layers[id]);
 			}
 		}
+		if (layers.length)  {
+			this._fireEvent(layers, e);
+		}
 	},
 
 	_onMouseMove: function (e) {
@@ -225,7 +229,7 @@ L.Canvas = L.Renderer.extend({
 		if (layer && (e.type === 'mouseout' || !layer._containsPoint(point))) {
 			// if we're leaving the layer, fire mouseout
 			L.DomUtil.removeClass(this._container, 'leaflet-interactive');
-			this._fireEvent(layer, e, 'mouseout');
+			this._fireEvent([layer], e, 'mouseout');
 			this._hoveredLayer = null;
 		}
 	},
@@ -237,19 +241,19 @@ L.Canvas = L.Renderer.extend({
 				layer = this._drawnLayers[id];
 				if (layer.options.interactive && layer._containsPoint(point)) {
 					L.DomUtil.addClass(this._container, 'leaflet-interactive'); // change cursor
-					this._fireEvent(layer, e, 'mouseover');
+					this._fireEvent([layer], e, 'mouseover');
 					this._hoveredLayer = layer;
 					break;
 				}
 			}
 		}
 		if (this._hoveredLayer) {
-			this._fireEvent(this._hoveredLayer, e);
+			this._fireEvent([this._hoveredLayer], e);
 		}
 	},
 
-	_fireEvent: function (layer, e, type) {
-		this._map._fireDOMEvent(e, type || e.type, [layer]);
+	_fireEvent: function (layers, e, type) {
+		this._map._fireDOMEvent(e, type || e.type, layers);
 	},
 
 	// TODO _bringToFront & _bringToBack, pretty tricky

src/map/Map.js

@@ -688,6 +688,8 @@ L.Map = L.Evented.extend({
 
 	_fireDOMEvent: function (e, type, targets) {
 
+		if (e._stopped) { return; }
+
 		targets = (targets || []).concat(this._findEventTargets(e, type));
 
 		if (!targets.length) { return; }