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eac76d9772
This patch removes support for mozapp iframes, leaving support for mozbrowser iframes intact. Some of the code has been rewritten in order to phrase things in terms of mozbrowser only, as opposed to mozbrowser or app. In some places, code that was only useful with apps has been completely removed, so that the APIs consumed can also be removed. In some places where the notion of appId was bleeding out of this API, now we use NO_APP_ID. Other notions of appId which were restricted to this API have been removed.
123 lines
3.2 KiB
JavaScript
123 lines
3.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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'use strict';
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this.EXPORTED_SYMBOLS = ['Frames'];
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const Cu = Components.utils;
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const Ci = Components.interfaces;
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Cu.import('resource://gre/modules/Services.jsm');
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Cu.import('resource://gre/modules/SystemAppProxy.jsm');
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const listeners = [];
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const Observer = {
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// Save a map of (MessageManager => Frame) to be able to dispatch
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// the FrameDestroyed event with a frame reference.
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_frames: new Map(),
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start: function () {
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Services.obs.addObserver(this, 'remote-browser-shown', false);
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Services.obs.addObserver(this, 'inprocess-browser-shown', false);
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Services.obs.addObserver(this, 'message-manager-close', false);
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SystemAppProxy.getFrames().forEach(frame => {
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let mm = frame.QueryInterface(Ci.nsIFrameLoaderOwner).frameLoader.messageManager;
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this._frames.set(mm, frame);
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});
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},
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stop: function () {
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Services.obs.removeObserver(this, 'remote-browser-shown');
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Services.obs.removeObserver(this, 'inprocess-browser-shown');
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Services.obs.removeObserver(this, 'message-manager-close');
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this._frames.clear();
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},
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observe: function (subject, topic, data) {
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switch(topic) {
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// Listen for frame creation in OOP (device) as well as in parent process (b2g desktop)
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case 'remote-browser-shown':
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case 'inprocess-browser-shown':
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let frameLoader = subject;
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// get a ref to the app <iframe>
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frameLoader.QueryInterface(Ci.nsIFrameLoader);
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let frame = frameLoader.ownerElement;
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let mm = frame.QueryInterface(Ci.nsIFrameLoaderOwner).frameLoader.messageManager;
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this.onMessageManagerCreated(mm, frame);
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break;
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// Every time an iframe is destroyed, its message manager also is
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case 'message-manager-close':
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this.onMessageManagerDestroyed(subject);
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break;
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}
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},
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onMessageManagerCreated: function (mm, frame) {
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this._frames.set(mm, frame);
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listeners.forEach(function (listener) {
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try {
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listener.onFrameCreated(frame);
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} catch(e) {
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dump('Exception while calling Frames.jsm listener:' + e + '\n' +
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e.stack + '\n');
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}
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});
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},
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onMessageManagerDestroyed: function (mm) {
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let frame = this._frames.get(mm);
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if (!frame) {
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// We received an event for an unknown message manager
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return;
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}
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this._frames.delete(mm);
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listeners.forEach(function (listener) {
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try {
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listener.onFrameDestroyed(frame);
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} catch(e) {
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dump('Exception while calling Frames.jsm listener:' + e + '\n' +
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e.stack + '\n');
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}
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});
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}
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};
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var Frames = this.Frames = {
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list: () => SystemAppProxy.getFrames(),
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addObserver: function (listener) {
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if (listeners.indexOf(listener) !== -1) {
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return;
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}
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listeners.push(listener);
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if (listeners.length == 1) {
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Observer.start();
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}
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},
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removeObserver: function (listener) {
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let idx = listeners.indexOf(listener);
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if (idx !== -1) {
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listeners.splice(idx, 1);
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}
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if (listeners.length === 0) {
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Observer.stop();
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}
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}
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};
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