Don't turn enter keypress into clicks on map (#5507)

* Don't turn enter keypress into clicks on map

But still preserve functionality to open marker's popup through
enter keypress when focused.

Fixes #5499.

* Clean code

Thanks @egoroof

* Change name of keypress handler to _onKeyPress

* Add unit test

spec/suites/core/GeneralSpec.js

@@ -0,0 +1,11 @@
+describe('General', function () {
+	describe('noConflict', function () {
+		var leaflet = L;
+
+		after(function () {
+			L = leaflet;
+		});
+
+		expect(L.noConflict()).to.eql(leaflet);
+	});
+});

spec/suites/layer/PopupSpec.js

@@ -248,6 +248,18 @@ describe('Popup', function () {
 		expect(map.hasLayer(layer._popup)).to.be(true);
 	});
 
+
+	it("can open a popup with enter keypress when marker has focus", function () {
+		var layer = new L.Marker([55.8, 37.6]).addTo(map);
+		layer.bindPopup("layer popup");
+
+		happen.keypress(layer._icon, {
+			keyCode: 13
+		});
+
+		expect(map.hasLayer(layer._popup)).to.be(true);
+	});
+
 });
 
 describe("L.Map#openPopup", function () {

src/layer/Popup.js

@@ -383,6 +383,7 @@ Layer.include({
 		if (!this._popupHandlersAdded) {
 			this.on({
 				click: this._openPopup,
+				keypress: this._onKeyPress,
 				remove: this.closePopup,
 				move: this._movePopup
 			});
@@ -398,6 +399,7 @@ Layer.include({
 		if (this._popup) {
 			this.off({
 				click: this._openPopup,
+				keypress: this._onKeyPress,
 				remove: this.closePopup,
 				move: this._movePopup
 			});
@@ -515,5 +517,11 @@ Layer.include({
 
 	_movePopup: function (e) {
 		this._popup.setLatLng(e.latlng);
+	},
+
+	_onKeyPress: function (e) {
+		if (e.originalEvent.keyCode === 13) {
+			this._openPopup(e);
+		}
 	}
 });

src/map/Map.js

@@ -1307,9 +1307,9 @@ export var Map = Evented.extend({
 	_handleDOMEvent: function (e) {
 		if (!this._loaded || DomEvent.skipped(e)) { return; }
 
-		var type = e.type === 'keypress' && e.keyCode === 13 ? 'click' : e.type;
+		var type = e.type;
 
-		if (type === 'mousedown') {
+		if (type === 'mousedown' || type === 'keypress') {
 			// prevents outline when clicking on keyboard-focusable element
 			DomUtil.preventOutline(e.target || e.srcElement);
 		}