gecko/toolkit/devtools/server/content-globals.js

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