93 lines
2.7 KiB
JavaScript
93 lines
2.7 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 = ["MultiscreenHandler"];
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const Ci = Components.interfaces;
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const Cu = Components.utils;
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Cu.import("resource://gre/modules/Services.jsm");
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function debug(aStr) {
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// dump("MultiscreenHandler: " + aStr + "\n");
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}
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var window = Services.wm.getMostRecentWindow("navigator:browser");
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// Multi-screen support on b2g. The following implementation will open a new
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// top-level window once we receive a display connected event.
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var MultiscreenHandler = {
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topLevelWindows: new Map(),
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init: function init() {
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Services.obs.addObserver(this, "display-changed", false);
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Services.obs.addObserver(this, "xpcom-shutdown", false);
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},
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uninit: function uninit() {
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Services.obs.removeObserver(this, "display-changed");
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Services.obs.removeObserver(this, "xpcom-shutdown");
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},
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observe: function observe(aSubject, aTopic, aData) {
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switch (aTopic) {
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case "display-changed":
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this.handleDisplayChangeEvent(aSubject);
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break
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case "xpcom-shutdown":
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this.uninit();
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break
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}
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},
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openTopLevelWindow: function openTopLevelWindow(aDisplay) {
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if (this.topLevelWindows.get(aDisplay.id)) {
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debug("Top level window for display id: " + aDisplay.id + " has been opened.");
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return;
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}
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let flags = Services.prefs.getCharPref("toolkit.defaultChromeFeatures") +
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",mozDisplayId=" + aDisplay.id;
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let remoteShellURL = Services.prefs.getCharPref("b2g.multiscreen.chrome_remote_url") +
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"#" + aDisplay.id;
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let win = Services.ww.openWindow(null, remoteShellURL, "myTopWindow" + aDisplay.id, flags, null);
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this.topLevelWindows.set(aDisplay.id, win);
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},
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closeTopLevelWindow: function closeTopLevelWindow(aDisplay) {
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let win = this.topLevelWindows.get(aDisplay.id);
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if (win) {
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win.close();
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this.topLevelWindows.delete(aDisplay.id);
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}
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},
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handleDisplayChangeEvent: function handleDisplayChangeEvent(aSubject) {
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let display = aSubject.QueryInterface(Ci.nsIDisplayInfo);
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let name = "multiscreen.enabled";
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let req = window.navigator.mozSettings.createLock().get(name);
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req.addEventListener("success", () => {
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let isMultiscreenEnabled = req.result[name];
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if (display.connected) {
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if (isMultiscreenEnabled) {
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this.openTopLevelWindow(display);
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}
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} else {
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this.closeTopLevelWindow(display);
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}
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});
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},
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};
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MultiscreenHandler.init();
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this.MultiscreenHandler = MultiscreenHandler;
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