michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: "use strict";
michael@0: 
michael@0: this.EXPORTED_SYMBOLS = ["gDevToolsExtensions"];
michael@0: 
michael@0: Components.utils.import("resource://gre/modules/Services.jsm");
michael@0: 
michael@0: let globalsCache = {};
michael@0: 
michael@0: this.gDevToolsExtensions = {
michael@0:   addContentGlobal: function(options) {
michael@0:     if (!options || !options.global || !options['inner-window-id']) {
michael@0:       throw Error('Invalid arguments');
michael@0:     }
michael@0:     let cache = getGlobalCache(options['inner-window-id']);
michael@0:     cache.push(options.global);
michael@0:     return undefined;
michael@0:   },
michael@0:   getContentGlobals: function(options) {
michael@0:     if (!options || !options['inner-window-id']) {
michael@0:       throw Error('Invalid arguments');
michael@0:     }
michael@0:     return Array.slice(globalsCache[options['inner-window-id']] || []);
michael@0:   },
michael@0:   removeContentGlobal: function(options) {
michael@0:     if (!options || !options.global || !options['inner-window-id']) {
michael@0:       throw Error('Invalid arguments');
michael@0:     }
michael@0:     let cache = getGlobalCache(options['inner-window-id']);
michael@0:     let index = cache.indexOf(options.global);
michael@0:     cache.splice(index, 1);
michael@0:     return undefined;
michael@0:   }
michael@0: };
michael@0: 
michael@0: function getGlobalCache(aInnerWindowID) {
michael@0:   return globalsCache[aInnerWindowID] = globalsCache[aInnerWindowID] || [];
michael@0: }
michael@0: 
michael@0: // when the window is destroyed, eliminate the associated globals cache
michael@0: Services.obs.addObserver(function observer(subject, topic, data) {
michael@0:   let id = subject.QueryInterface(Components.interfaces.nsISupportsPRUint64).data;
michael@0:   delete globalsCache[id];
michael@0: }, 'inner-window-destroyed', false);