зеркало из https://github.com/mozilla/gecko-dev.git
85 строки
2.5 KiB
JavaScript
85 строки
2.5 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/. */
|
|
|
|
/**
|
|
* helper object for APIs that deal with DOMRequest and need to release them properly
|
|
* when the window goes out of scope
|
|
*/
|
|
const Cu = Components.utils;
|
|
const Cc = Components.classes;
|
|
const Ci = Components.interfaces;
|
|
|
|
let EXPORTED_SYMBOLS = ["DOMRequestIpcHelper"];
|
|
|
|
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
|
|
Cu.import("resource://gre/modules/Services.jsm");
|
|
|
|
XPCOMUtils.defineLazyGetter(this, "cpmm", function() {
|
|
return Cc["@mozilla.org/childprocessmessagemanager;1"].getService(Ci.nsIFrameMessageManager);
|
|
});
|
|
|
|
function DOMRequestIpcHelper() {
|
|
}
|
|
|
|
DOMRequestIpcHelper.prototype = {
|
|
getRequestId: function(aRequest) {
|
|
let id = "id" + this._getRandomId();
|
|
this._requests[id] = aRequest;
|
|
return id;
|
|
},
|
|
|
|
getRequest: function(aId) {
|
|
if (this._requests[aId])
|
|
return this._requests[aId];
|
|
},
|
|
|
|
removeRequest: function(aId) {
|
|
if (this._requests[aId])
|
|
delete this._requests[aId];
|
|
},
|
|
|
|
takeRequest: function(aId) {
|
|
if (!this._requests[aId])
|
|
return null;
|
|
let request = this._requests[aId];
|
|
delete this._requests[aId];
|
|
return request;
|
|
},
|
|
|
|
_getRandomId: function() {
|
|
return Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator).generateUUID().toString();
|
|
},
|
|
|
|
observe: function(aSubject, aTopic, aData) {
|
|
let wId = aSubject.QueryInterface(Ci.nsISupportsPRUint64).data;
|
|
if (wId == this.innerWindowID) {
|
|
Services.obs.removeObserver(this, "inner-window-destroyed");
|
|
this._requests = [];
|
|
this._window = null;
|
|
this._messages.forEach((function(msgName) {
|
|
cpmm.removeMessageListener(msgName, this);
|
|
}).bind(this));
|
|
if(this.uninit)
|
|
this.uninit();
|
|
}
|
|
},
|
|
|
|
initHelper: function(aWindow, aMessages) {
|
|
this._messages = aMessages;
|
|
this._requests = [];
|
|
this._window = aWindow;
|
|
let util = this._window.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
|
|
this.innerWindowID = util.currentInnerWindowID;
|
|
this._id = this._getRandomId();
|
|
Services.obs.addObserver(this, "inner-window-destroyed", false);
|
|
this._messages.forEach((function(msgName) {
|
|
cpmm.addMessageListener(msgName, this);
|
|
}).bind(this));
|
|
},
|
|
|
|
createRequest: function() {
|
|
return Services.DOMRequest.createRequest(this._window);
|
|
}
|
|
}
|