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nuTensor/platform/firefox/bootstrap.js

246 lines
7.9 KiB
JavaScript

/*******************************************************************************
uMatrix - a browser extension to block requests.
Copyright (C) 2014-2017 The uMatrix/uBlock Origin authors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uMatrix
*/
/* global ADDON_UNINSTALL, APP_SHUTDOWN */
/* exported startup, shutdown, install, uninstall */
'use strict';
/******************************************************************************/
const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
// Accessing the context of the background page:
// var win = Services.appShell.hiddenDOMWindow.document.querySelector('iframe[src*=umatrix]').contentWindow;
let windowlessBrowser = null;
let windowlessBrowserPL = null;
let bgProcess = null;
let version;
const hostName = 'umatrix';
const restartListener = {
get messageManager() {
return Cc['@mozilla.org/parentprocessmessagemanager;1']
.getService(Ci.nsIMessageListenerManager);
},
receiveMessage: function() {
shutdown();
startup();
}
};
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/2493
// Fix by https://github.com/gijsk
// imported from https://github.com/gorhill/uBlock/pull/2497
function startup(data/*, reason*/) {
if ( data !== undefined ) {
version = data.version;
}
// Already started?
if ( bgProcess !== null ) {
return;
}
waitForHiddenWindow();
}
function createBgProcess(parentDocument) {
bgProcess = parentDocument.documentElement.appendChild(
parentDocument.createElementNS('http://www.w3.org/1999/xhtml', 'iframe')
);
bgProcess.setAttribute(
'src',
'chrome://' + hostName + '/content/background.html#' + version
);
// https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIMessageListenerManager#addMessageListener%28%29
// "If the same listener registers twice for the same message, the
// "second registration is ignored."
restartListener.messageManager.addMessageListener(
hostName + '-restart',
restartListener
);
}
function getWindowlessBrowserFrame(appShell) {
windowlessBrowser = appShell.createWindowlessBrowser(true);
windowlessBrowser.QueryInterface(Ci.nsIInterfaceRequestor);
let webProgress = windowlessBrowser.getInterface(Ci.nsIWebProgress);
let XPCOMUtils = Cu.import('resource://gre/modules/XPCOMUtils.jsm', null).XPCOMUtils;
windowlessBrowserPL = {
QueryInterface: XPCOMUtils.generateQI([
Ci.nsIWebProgressListener,
Ci.nsIWebProgressListener2,
Ci.nsISupportsWeakReference
]),
onStateChange: function(wbp, request, stateFlags, status) {
if ( !request ) { return; }
if ( stateFlags & Ci.nsIWebProgressListener.STATE_STOP ) {
webProgress.removeProgressListener(windowlessBrowserPL);
windowlessBrowserPL = null;
createBgProcess(windowlessBrowser.document);
}
}
};
webProgress.addProgressListener(windowlessBrowserPL, Ci.nsIWebProgress.NOTIFY_STATE_DOCUMENT);
windowlessBrowser.document.location = "data:application/vnd.mozilla.xul+xml;charset=utf-8,<window%20id='" + hostName + "-win'/>";
}
function waitForHiddenWindow() {
let appShell = Cc['@mozilla.org/appshell/appShellService;1']
.getService(Ci.nsIAppShellService);
let isReady = function() {
var hiddenDoc;
try {
hiddenDoc = appShell.hiddenDOMWindow &&
appShell.hiddenDOMWindow.document;
} catch (ex) {
}
// Do not test against `loading`: it does appear `readyState` could be
// undefined if looked up too early.
if ( !hiddenDoc || hiddenDoc.readyState !== 'complete' ) {
return false;
}
// In theory, it should be possible to create a windowless browser
// immediately, without waiting for the hidden window to have loaded
// completely. However, in practice, on Windows this seems to lead
// to a broken Firefox appearance. To avoid this, we only create the
// windowless browser here. We'll use that rather than the hidden
// window for the actual background page (windowless browsers are
// also what the webextension implementation in Firefox uses for
// background pages).
let { Services } = Cu.import('resource://gre/modules/Services.jsm', null);
if ( Services.vc.compare(Services.appinfo.platformVersion, '27') >= 0 ) {
getWindowlessBrowserFrame(appShell);
} else {
createBgProcess(hiddenDoc);
}
return true;
};
if ( isReady() ) {
return;
}
// https://github.com/gorhill/uBlock/issues/749
// Poll until the proper environment is set up -- or give up eventually.
// We poll frequently early on but relax poll delay as time pass.
let tryDelay = 5;
let trySum = 0;
// https://trac.torproject.org/projects/tor/ticket/19438
// Try for a longer period.
let tryMax = 600011;
let timer = Cc['@mozilla.org/timer;1']
.createInstance(Ci.nsITimer);
let checkLater = function() {
trySum += tryDelay;
if ( trySum >= tryMax ) {
timer = null;
return;
}
timer.init(timerObserver, tryDelay, timer.TYPE_ONE_SHOT);
tryDelay *= 2;
if ( tryDelay > 503 ) {
tryDelay = 503;
}
};
var timerObserver = {
observe: function() {
timer.cancel();
if ( isReady() ) {
timer = null;
} else {
checkLater();
}
}
};
checkLater();
}
/******************************************************************************/
function shutdown(data, reason) {
if ( reason === APP_SHUTDOWN ) {
return;
}
if ( bgProcess !== null ) {
bgProcess.parentNode.removeChild(bgProcess);
bgProcess = null;
}
if ( windowlessBrowser !== null ) {
// close() does not exist for older versions of Firefox.
if ( typeof windowlessBrowser.close === 'function' ) {
windowlessBrowser.close();
}
windowlessBrowser = null;
windowlessBrowserPL = null;
}
if ( data === undefined ) {
return;
}
// Remove the restartObserver only when the extension is being disabled
restartListener.messageManager.removeMessageListener(
hostName + '-restart',
restartListener
);
}
/******************************************************************************/
function install() {
// https://bugzil.la/719376
Cc['@mozilla.org/intl/stringbundle;1']
.getService(Ci.nsIStringBundleService)
.flushBundles();
}
/******************************************************************************/
function uninstall(data, aReason) {
if ( aReason !== ADDON_UNINSTALL ) {
return;
}
// To cleanup vAPI.localStorage in vapi-common.js, aka
// "extensions.umatrix.*" in `about:config`.
Cu.import('resource://gre/modules/Services.jsm', null)
.Services.prefs.getBranch('extensions.' + hostName + '.')
.deleteBranch('');
}
/******************************************************************************/