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https://gitlab.winehq.org/wine/wine-gecko.git
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81 lines
2.4 KiB
JavaScript
81 lines
2.4 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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/**
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* helper object for APIs that deal with DOMRequest and need to release them properly
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* when the window goes out of scope
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*/
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const Cu = Components.utils;
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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let EXPORTED_SYMBOLS = ["DOMRequestIpcHelper"];
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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XPCOMUtils.defineLazyGetter(Services, "rs", function() {
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return Cc["@mozilla.org/dom/dom-request-service;1"].getService(Ci.nsIDOMRequestService);
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});
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XPCOMUtils.defineLazyGetter(this, "cpmm", function() {
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return Cc["@mozilla.org/childprocessmessagemanager;1"].getService(Ci.nsIFrameMessageManager);
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});
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function DOMRequestIpcHelper() {
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}
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DOMRequestIpcHelper.prototype = {
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getRequestId: function(aRequest) {
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let id = "id" + this._getRandomId();
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this._requests[id] = aRequest;
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return id;
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},
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getRequest: function(aId) {
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if (this._requests[aId])
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return this._requests[aId];
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},
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removeRequest: function(aId) {
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if (this._requests[aId])
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delete this._requests[aId];
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},
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_getRandomId: function() {
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return Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator).generateUUID().toString();
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},
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observe: function(aSubject, aTopic, aData) {
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let wId = aSubject.QueryInterface(Ci.nsISupportsPRUint64).data;
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if (wId == this.innerWindowID) {
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Services.obs.removeObserver(this, "inner-window-destroyed");
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this._requests = [];
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this._window = null;
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this._messages.forEach((function(msgName) {
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cpmm.removeMessageListener(msgName, this);
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}).bind(this));
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if(this.uninit)
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this.uninit();
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}
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},
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initHelper: function(aWindow, aMessages) {
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this._messages = aMessages;
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this._requests = [];
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this._window = aWindow;
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let util = this._window.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
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this.innerWindowID = util.currentInnerWindowID;
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this._id = this._getRandomId();
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Services.obs.addObserver(this, "inner-window-destroyed", false);
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this._messages.forEach((function(msgName) {
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cpmm.addMessageListener(msgName, this);
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}).bind(this));
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},
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createRequest: function() {
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return Services.rs.createRequest(this._window);
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}
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}
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