gecko/mobile/android/chrome/content/dbg-browser-actors.js

103 lines
3.5 KiB
JavaScript

/* -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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";
/**
* Fennec-specific actors.
*/
/**
* Construct a root actor appropriate for use in a server running in a
* browser on Android. The returned root actor:
* - respects the factories registered with DebuggerServer.addGlobalActor,
* - uses a MobileTabList to supply tab actors,
* - sends all navigator:browser window documents a Debugger:Shutdown event
* when it exits.
*
* * @param aConnection DebuggerServerConnection
* The conection to the client.
*/
function createRootActor(aConnection)
{
let parameters = {
tabList: new MobileTabList(aConnection),
globalActorFactories: DebuggerServer.globalActorFactories,
onShutdown: sendShutdownEvent
};
return new RootActor(aConnection, parameters);
}
/**
* A live list of BrowserTabActors representing the current browser tabs,
* to be provided to the root actor to answer 'listTabs' requests.
*
* This object also takes care of listening for TabClose events and
* onCloseWindow notifications, and exiting the BrowserTabActors concerned.
*
* (See the documentation for RootActor for the definition of the "live
* list" interface.)
*
* @param aConnection DebuggerServerConnection
* The connection in which this list's tab actors may participate.
*
* @see BrowserTabList for more a extensive description of how tab list objects
* work.
*/
function MobileTabList(aConnection)
{
BrowserTabList.call(this, aConnection);
}
MobileTabList.prototype = Object.create(BrowserTabList.prototype);
MobileTabList.prototype.constructor = MobileTabList;
MobileTabList.prototype.iterator = function() {
// As a sanity check, make sure all the actors presently in our map get
// picked up when we iterate over all windows' tabs.
let initialMapSize = this._actorByBrowser.size;
let foundCount = 0;
// To avoid mysterious behavior if tabs are closed or opened mid-iteration,
// we update the map first, and then make a second pass over it to yield
// the actors. Thus, the sequence yielded is always a snapshot of the
// actors that were live when we began the iteration.
// Iterate over all navigator:browser XUL windows.
for (let win of allAppShellDOMWindows("navigator:browser")) {
let selectedTab = win.BrowserApp.selectedBrowser;
// For each tab in this XUL window, ensure that we have an actor for
// it, reusing existing actors where possible. We actually iterate
// over 'browser' XUL elements, and BrowserTabActor uses
// browser.contentWindow.wrappedJSObject as the debuggee global.
for (let tab of win.BrowserApp.tabs) {
let browser = tab.browser;
// Do we have an existing actor for this browser? If not, create one.
let actor = this._actorByBrowser.get(browser);
if (actor) {
foundCount++;
} else {
actor = new BrowserTabActor(this._connection, browser);
this._actorByBrowser.set(browser, actor);
}
// Set the 'selected' properties on all actors correctly.
actor.selected = (browser === selectedTab);
}
}
if (this._testing && initialMapSize !== foundCount)
throw Error("_actorByBrowser map contained actors for dead tabs");
this._mustNotify = true;
this._checkListening();
/* Yield the values. */
for (let [browser, actor] of this._actorByBrowser) {
yield actor;
}
};