gecko-dev/testing/marionette/marionette-frame-manager.js

208 строки
10 KiB
JavaScript

/* 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/. */
this.EXPORTED_SYMBOLS = [
"FrameManager"
];
let FRAME_SCRIPT = "chrome://marionette/content/marionette-listener.js";
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Log.jsm");
let logger = Log.repository.getLogger("Marionette");
//list of OOP frames that has the frame script loaded
let remoteFrames = [];
/**
* An object representing a frame that Marionette has loaded a
* frame script in.
*/
function MarionetteRemoteFrame(windowId, frameId) {
this.windowId = windowId; //outerWindowId relative to main process
this.frameId = frameId; //actual frame relative to windowId's frames list
this.targetFrameId = this.frameId; //assigned FrameId, used for messaging
};
/**
* The FrameManager will maintain the list of Out Of Process (OOP) frames and will handle
* frame switching between them.
* It handles explicit frame switching (switchToFrame), and implicit frame switching, which
* occurs when a modal dialog is triggered in B2G.
*
*/
this.FrameManager = function FrameManager(server) {
//messageManager maintains the messageManager for the current process' chrome frame or the global message manager
this.currentRemoteFrame = null; //holds a member of remoteFrames (for an OOP frame) or null (for the main process)
this.previousRemoteFrame = null; //frame we'll need to restore once interrupt is gone
this.handledModal = false; //set to true when we have been interrupted by a modal
this.server = server; // a reference to the marionette server
};
FrameManager.prototype = {
QueryInterface: XPCOMUtils.generateQI([Ci.nsIMessageListener,
Ci.nsISupportsWeakReference]),
/**
* Receives all messages from content messageManager
*/
receiveMessage: function FM_receiveMessage(message) {
switch (message.name) {
case "MarionetteFrame:getInterruptedState":
// This will return true if the calling frame was interrupted by a modal dialog
if (this.previousRemoteFrame) {
let interruptedFrame = Services.wm.getOuterWindowWithId(this.previousRemoteFrame.windowId);//get the frame window of the interrupted frame
if (this.previousRemoteFrame.frameId != null) {
interruptedFrame = interruptedFrame.document.getElementsByTagName("iframe")[this.previousRemoteFrame.frameId]; //find the OOP frame
}
//check if the interrupted frame is the same as the calling frame
if (interruptedFrame.src == message.target.src) {
return {value: this.handledModal};
}
}
else if (this.currentRemoteFrame == null) {
// we get here if previousRemoteFrame and currentRemoteFrame are null, ie: if we're in a non-OOP process, or we haven't switched into an OOP frame, in which case, handledModal can't be set to true.
return {value: this.handledModal};
}
return {value: false};
case "MarionetteFrame:handleModal":
/*
* handleModal is called when we need to switch frames to the main process due to a modal dialog interrupt.
*/
// If previousRemoteFrame was set, that means we switched into a remote frame.
// If this is the case, then we want to switch back into the system frame.
// If it isn't the case, then we're in a non-OOP environment, so we don't need to handle remote frames
let isLocal = true;
if (this.currentRemoteFrame != null) {
isLocal = false;
this.removeMessageManagerListeners(this.currentRemoteFrame.messageManager.get());
//store the previous frame so we can switch back to it when the modal is dismissed
this.previousRemoteFrame = this.currentRemoteFrame;
//by setting currentRemoteFrame to null, it signifies we're in the main process
this.currentRemoteFrame = null;
this.server.messageManager = Cc["@mozilla.org/globalmessagemanager;1"]
.getService(Ci.nsIMessageBroadcaster);
}
this.handledModal = true;
this.server.sendOk(this.server.command_id);
return {value: isLocal};
case "MarionetteFrame:getCurrentFrameId":
if (this.currentRemoteFrame != null) {
return this.currentRemoteFrame.frameId;
}
}
},
//This is just 'switch to OOP frame'. We're handling this here so we can maintain a list of remoteFrames.
switchToFrame: function FM_switchToFrame(message) {
// Switch to a remote frame.
let frameWindow = Services.wm.getOuterWindowWithId(message.json.win); //get the original frame window
let oopFrame = frameWindow.document.getElementsByTagName("iframe")[message.json.frame]; //find the OOP frame
let mm = oopFrame.QueryInterface(Ci.nsIFrameLoaderOwner).frameLoader.messageManager; //get the OOP frame's mm
// See if this frame already has our frame script loaded in it; if so,
// just wake it up.
for (let i = 0; i < remoteFrames.length; i++) {
let frame = remoteFrames[i];
let frameMessageManager = frame.messageManager.get();
logger.info("trying remote frame " + i);
try {
frameMessageManager.sendAsyncMessage("aliveCheck", {});
}
catch(e) {
if (e.result == Components.results.NS_ERROR_NOT_INITIALIZED) {
logger.info("deleting frame");
remoteFrames.splice(i, 1);
continue;
}
}
if (frameMessageManager == mm) {
this.currentRemoteFrame = frame;
this.addMessageManagerListeners(mm);
mm.sendAsyncMessage("Marionette:restart", {});
return;
}
}
// If we get here, then we need to load the frame script in this frame,
// and set the frame's ChromeMessageSender as the active message manager the server will listen to
this.addMessageManagerListeners(mm);
logger.info("frame-manager load script: " + mm.toString());
mm.loadFrameScript(FRAME_SCRIPT, true, true);
let aFrame = new MarionetteRemoteFrame(message.json.win, message.json.frame);
aFrame.messageManager = Cu.getWeakReference(mm);
remoteFrames.push(aFrame);
this.currentRemoteFrame = aFrame;
},
/*
* This function handles switching back to the frame that was interrupted by the modal dialog.
* This function gets called by the interrupted frame once the dialog is dismissed and the frame resumes its process
*/
switchToModalOrigin: function FM_switchToModalOrigin() {
//only handle this if we indeed switched out of the modal's originating frame
if (this.previousRemoteFrame != null) {
this.currentRemoteFrame = this.previousRemoteFrame;
this.addMessageManagerListeners(this.currentRemoteFrame.messageManager.get());
}
this.handledModal = false;
},
/**
* Adds message listeners to the server, listening for messages from content frame scripts.
* It also adds a "MarionetteFrame:getInterruptedState" message listener to the FrameManager,
* so the frame manager's state can be checked by the frame
*
* @param object messageManager
* The messageManager object (ChromeMessageBroadcaster or ChromeMessageSender)
* to which the listeners should be added.
*/
addMessageManagerListeners: function MDA_addMessageManagerListeners(messageManager) {
messageManager.addWeakMessageListener("Marionette:ok", this.server);
messageManager.addWeakMessageListener("Marionette:done", this.server);
messageManager.addWeakMessageListener("Marionette:error", this.server);
messageManager.addWeakMessageListener("Marionette:emitTouchEvent", this.server);
messageManager.addWeakMessageListener("Marionette:log", this.server);
messageManager.addWeakMessageListener("Marionette:register", this.server);
messageManager.addWeakMessageListener("Marionette:runEmulatorCmd", this.server);
messageManager.addWeakMessageListener("Marionette:runEmulatorShell", this.server);
messageManager.addWeakMessageListener("Marionette:shareData", this.server);
messageManager.addWeakMessageListener("Marionette:switchToModalOrigin", this.server);
messageManager.addWeakMessageListener("Marionette:switchToFrame", this.server);
messageManager.addWeakMessageListener("Marionette:switchedToFrame", this.server);
messageManager.addWeakMessageListener("MarionetteFrame:handleModal", this);
messageManager.addWeakMessageListener("MarionetteFrame:getCurrentFrameId", this);
messageManager.addWeakMessageListener("MarionetteFrame:getInterruptedState", this);
},
/**
* Removes listeners for messages from content frame scripts.
* We do not remove the "MarionetteFrame:getInterruptedState" or the
* "Marioentte:switchToModalOrigin" message listener,
* because we want to allow all known frames to contact the frame manager so that
* it can check if it was interrupted, and if so, it will call switchToModalOrigin
* when its process gets resumed.
*
* @param object messageManager
* The messageManager object (ChromeMessageBroadcaster or ChromeMessageSender)
* from which the listeners should be removed.
*/
removeMessageManagerListeners: function MDA_removeMessageManagerListeners(messageManager) {
messageManager.removeWeakMessageListener("Marionette:ok", this.server);
messageManager.removeWeakMessageListener("Marionette:done", this.server);
messageManager.removeWeakMessageListener("Marionette:error", this.server);
messageManager.removeWeakMessageListener("Marionette:log", this.server);
messageManager.removeWeakMessageListener("Marionette:shareData", this.server);
messageManager.removeWeakMessageListener("Marionette:register", this.server);
messageManager.removeWeakMessageListener("Marionette:runEmulatorCmd", this.server);
messageManager.removeWeakMessageListener("Marionette:runEmulatorShell", this.server);
messageManager.removeWeakMessageListener("Marionette:switchToFrame", this.server);
messageManager.removeWeakMessageListener("Marionette:switchedToFrame", this.server);
messageManager.removeWeakMessageListener("MarionetteFrame:handleModal", this);
messageManager.removeWeakMessageListener("MarionetteFrame:getCurrentFrameId", this);
},
};