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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+module.metadata = {
+ "stability": "unstable"
+};
+
+const { Class } = require("../core/heritage");
+const { EventTarget } = require("../event/target");
+const { emit } = require("../event/core");
+const { DOMEventAssembler } = require("../deprecated/events/assembler");
+const { browserWindowIterator } = require('../deprecated/window-utils');
+const { isBrowser } = require('../window/utils');
+const { observer: windowObserver } = require("../windows/observer");
+
+// Event emitter objects used to register listeners and emit events on them
+// when they occur.
+const Observer = Class({
+ implements: [DOMEventAssembler, EventTarget],
+ initialize() {
+ // Adding each opened window to a list of observed windows.
+ windowObserver.on("open", window => {
+ if (isBrowser(window))
+ this.observe(window);
+ });
+
+ // Removing each closed window form the list of observed windows.
+ windowObserver.on("close", window => {
+ if (isBrowser(window))
+ this.ignore(window);
+ });
+
+ // Making observer aware of already opened windows.
+ for (let window of browserWindowIterator()) {
+ this.observe(window);
+ }
+ },
+ /**
+ * Events that are supported and emitted by the module.
+ */
+ supportedEventsTypes: [ "keydown", "keyup", "keypress" ],
+ /**
+ * Function handles all the supported events on all the windows that are
+ * observed. Method is used to proxy events to the listeners registered on
+ * this event emitter.
+ * @param {Event} event
+ * Keyboard event being emitted.
+ */
+ handleEvent(event) {
+ emit(this, event.type, event, event.target.ownerDocument ? event.target.ownerDocument.defaultView
+ : undefined);
+ }
+});
+
+exports.observer = new Observer();