The Tor Browser / file revision

 /* 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";

 module.metadata = {

   "stability": "experimental"

 };

 const { Ci, Cc } = require("chrome");

 const { make: makeWindow, getHiddenWindow } = require("../window/utils");

 const { create: makeFrame, getDocShell } = require("../frame/utils");

 const { defer } = require("../core/promise");

 const { when: unload } = require("../system/unload");

 const cfxArgs = require("@test/options");

 let addonPrincipal = Cc["@mozilla.org/systemprincipal;1"].

                      createInstance(Ci.nsIPrincipal);

 let hiddenWindow = getHiddenWindow();

 if (cfxArgs.parseable) {

   console.info("hiddenWindow document.documentURI:" +

     hiddenWindow.document.documentURI);

   console.info("hiddenWindow document.readyState:" +

     hiddenWindow.document.readyState);

 }

 // Once Bug 565388 is fixed and shipped we'll be able to make invisible,

 // permanent docShells. Meanwhile we create hidden top level window and

 // use it's docShell.

 let frame = makeFrame(hiddenWindow.document, {

   nodeName: "iframe",

   namespaceURI: "http://www.w3.org/1999/xhtml",

   allowJavascript: true,

   allowPlugins: true

 })

 let docShell = getDocShell(frame);

 let eventTarget = docShell.chromeEventHandler;

 // We need to grant docShell system principals in order to load XUL document

 // from data URI into it.

 docShell.createAboutBlankContentViewer(addonPrincipal);

 // Get a reference to the DOM window of the given docShell and load

 // such document into that would allow us to create XUL iframes, that

 // are necessary for hidden frames etc..

 let window = docShell.contentViewer.DOMDocument.defaultView;

 window.location = "data:application/vnd.mozilla.xul+xml;charset=utf-8,<window/>";

 // Create a promise that is delivered once add-on window is interactive,

 // used by add-on runner to defer add-on loading until window is ready.

 let { promise, resolve } = defer();

 eventTarget.addEventListener("DOMContentLoaded", function handler(event) {

   eventTarget.removeEventListener("DOMContentLoaded", handler, false);

   resolve();

 }, false);

 exports.ready = promise;

 exports.window = window;

 // Still close window on unload to claim memory back early.

 unload(function() {

   window.close()

   frame.parentNode.removeChild(frame);

 });