48 lines
1.5 KiB
JavaScript
48 lines
1.5 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const { Ci } = require("chrome");
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const Services = require("Services");
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var globalsCache = {};
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exports.addContentGlobal = function(options) {
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if (!options || !options.global || !options['inner-window-id']) {
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throw Error('Invalid arguments');
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}
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let cache = getGlobalCache(options['inner-window-id']);
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cache.push(options.global);
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return undefined;
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}
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exports.getContentGlobals = function(options) {
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if (!options || !options['inner-window-id']) {
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throw Error('Invalid arguments');
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}
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return Array.slice(globalsCache[options['inner-window-id']] || []);
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}
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exports.removeContentGlobal = function(options) {
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if (!options || !options.global || !options['inner-window-id']) {
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throw Error('Invalid arguments');
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}
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let cache = getGlobalCache(options['inner-window-id']);
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let index = cache.indexOf(options.global);
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cache.splice(index, 1);
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return undefined;
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}
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function getGlobalCache(aInnerWindowID) {
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return globalsCache[aInnerWindowID] = globalsCache[aInnerWindowID] || [];
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}
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// when the window is destroyed, eliminate the associated globals cache
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if (!isWorker) {
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Services.obs.addObserver(function observer(subject, topic, data) {
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let id = subject.QueryInterface(Ci.nsISupportsPRUint64).data;
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delete globalsCache[id];
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}, 'inner-window-destroyed', false);
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}
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