/usr/share/xul-ext/ubufox/components/UpdateNotifier.js is in xul-ext-ubufox 2.8-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is ubufox.
*
* The Initial Developer of the Original Code is
* Canonical Ltd.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Alexander Sack <asac@jwsdot.com> - Canonical Ltd.
* Arzhel Younsi <xionox@gmail.com>
* Chris Coulson <chris.coulson@canonical.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/FileUtils.jsm");
Cu.import("resource://gre/modules/ctypes.jsm");
Cu.import("resource://ubufox/modules/utils.jsm");
Cu.import("resource://ubufox/libs/gio.jsm");
Cu.import("resource://ubufox/libs/gobject.jsm");
Cu.import("resource://ubufox/libs/glib.jsm");
const NS_XPCOM_CURRENT_PROCESS_DIR = "XCurProcD";
const NS_GRE_DIR = "GreD";
const NS_USER_PLUGINS_DIR = "UserPlugins";
const NS_APP_PLUGINS_DIR = "APlugns";
const NS_SYSTEM_PLUGINS_DIR = "SysPlugins";
const XRE_SYS_LOCAL_EXTENSION_PARENT_DIR = "XRESysLExtPD";
const XRE_SYS_SHARE_EXTENSION_PARENT_DIR = "XRESysSExtPD";
const XRE_EXTENSIONS_DIR_LIST = "XREExtDL";
addLogger(this, "update-notifier");
function UpdateNotifier() {
LOG("Starting");
this.wrappedJSObject = this;
var listeners = [];
var watches = {};
var timers = {};
var dispatched = [];
var plugins = {};
/**
* Add a listener to receive update notifications
* Calling this inside a notification may produce undefined results
*
* @param aListener
* The listener object
*/
this.addListener = function UN_addListener(aListener) {
if (!aListener) {
throw new Error("A listener must be specified");
}
if (typeof(aListener) != "object") {
throw new Error("Invalid listener");
}
if (listeners.indexOf(aListener) != -1) {
throw new Error("Trying to register an observer more than once");
}
listeners.push(aListener);
for (let event in dispatched) {
try {
if (event in aListener) {
aListener[event].apply(aListener, dispatched[event]);
}
} catch(e) {
ERROR("Listener threw", e);
}
}
};
/**
* Remove a listener and don't receive any more notifications.
* Calling this inside a notification may produce undefined results
*
* @param aListener
* The listener to remove
*/
this.removeListener = function UN_removeListener(aListener) {
let index = listeners.indexOf(aListener);
if (index == -1) {
throw new Error("Trying to remove an observer that was never registered");
}
listeners.splice(index, 1);
};
function dispatchNotification(aEvent) {
if (dispatched.indexOf(aEvent) != -1) {
return;
}
dispatched.push(aEvent);
listeners.forEach(function(listener) {
try {
if (aEvent in listener) {
listener[aEvent].apply(listener);
}
} catch(e) {
ERROR("Listener threw", e);
}
});
}
function handleAppUpdated() {
LOG("Application change detected");
dispatchNotification("onAppUpdated");
}
function handlePluginsChanged() {
LOG("Plugin change detected");
let ph = Cc["@mozilla.org/plugin/host;1"].getService(Ci.nsIPluginHost);
try {
ph.reloadPlugins(false);
} catch(e) {
LOG("nsIPluginHost.reloadPlugins failed. No changes?");
return;
}
// Here's how this works:
// - We iterate over the updated list of plugin tags from the plugin host
// - For each plugin tag, we check if we have old data for that plugin,
// looking up by path
// - We then pass over and new plugin data that hasn't been paired with
// old data, and see if it matches any old data by name. This is to handle
// plugin upgrades where the install path changes. We do this in
// a separate pass in case there is more than one plugin with the same
// name. In this case, we can still get a match if only one of those
// is updated.
// - Obviously, if a plugin update changes its path and name, we detect
// that as a new install
// - For each plugin, we compare the newest mtime with the recorded mtime
// from the old plugin data (if it exists). If the old data exists and the
// mtime is different, then the plugin was updated
let newPlugins = {};
ph.getPluginTags().forEach(function(pluginTag) {
LOG("Processing plugin \"" + pluginTag.name + "\" at " +
pluginTag.fullpath);
if (pluginTag.fullpath in plugins) {
var oldPluginData = plugins[pluginTag.fullpath];
delete plugins[pluginTag.fullpath];
}
if (oldPluginData) {
LOG("Found old data for plugin with the same path (\"" +
oldPluginData.name + "\", lastModifiedTime " +
oldPluginData.lastModifiedTime + ")");
}
if (!(pluginTag.fullpath in newPlugins)) {
let plugin = {
"pluginData": {
"path": pluginTag.fullpath,
"name": pluginTag.name
},
"oldPluginData": oldPluginData
};
newPlugins[pluginTag.fullpath] = plugin;
try {
plugin.pluginData.lastModifiedTime = (new FileUtils.File(pluginTag.fullpath))
.lastModifiedTime;
LOG("Updated lastModifiedTime: " + plugin.pluginData
.lastModifiedTime);
} catch(e) {
LOG("Plugin at path " + pluginTag.fullpath + " was not found");
delete newPlugins[pluginTag.fullpath];
}
}
});
let pluginPathsByName = {};
for (let path in plugins) {
pluginPathsByName[plugins[path].name] = path;
}
// Try to match new data to old data by name, for plugins
// where the install path changed
for each (let plugin in newPlugins) {
if (plugin.oldPluginData) {
continue;
}
if (plugin.pluginData.name in pluginPathsByName) {
let path = pluginPathsByName[plugin.pluginData.name];
plugin.oldPluginData = plugins[path];
delete plugins[path];
LOG("Found old data for plugin \"" + plugin.pluginData.name +
"\". Old path: " + path + ", old lastModifiedTime: " +
plugin.oldPluginData.lastModifiedTime + ", new path: " +
plugin.pluginData.path);
}
}
Object.keys(plugins).forEach(function(path) {
LOG("Plugin \"" + plugins[path].name + "\" at " +
plugins[path].path + " was removed");
delete plugins[path];
});
let foundUpdated = false;
for each (let plugin in newPlugins) {
if (plugin.oldPluginData &&
plugin.oldPluginData.lastModifiedTime !=
plugin.pluginData.lastModifiedTime) {
LOG("Plugin \"" + plugin.pluginData.name + "\" at " +
plugin.pluginData.path + " was updated");
foundUpdated = true;
} else if (!plugin.oldPluginData) {
LOG("Plugin \"" + plugin.pluginData.name + "\" at " +
plugin.pluginData.path + " was newly installed");
} else {
LOG("Plugin \"" + plugin.pluginData.name + "\" at " +
plugin.pluginData.path + " is unchanged");
}
plugins[plugin.pluginData.path] = plugin.pluginData;
}
if (foundUpdated) {
dispatchNotification("onPluginsUpdated");
}
}
function handleAddonsChanged() {
// We don't know how to handle addon changes yet
}
function handler(aFile, aEventType, aIsDir) {
if (aEventType == gio.GFileMonitorEventEnums.G_FILE_MONITOR_EVENT_CHANGED ||
aEventType == gio.GFileMonitorEventEnums.G_FILE_MONITOR_EVENT_DELETED ||
aEventType == gio.GFileMonitorEventEnums.G_FILE_MONITOR_EVENT_CREATED ||
aEventType == gio.GFileMonitorEventEnums.G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED) {
let path = gio.g_file_get_path(aFile);
let type;
if (!(path in watches) && aIsDir) {
type = watches[(new FileUtils.File(path)).parent.path].type;
} else {
type = watches[path].type;
}
if (!type) {
ERROR("Got event for a path not in our watch list: " + path);
return;
}
// Wait for the location to settle before dispatching the notification
if (!(type in timers)) {
timers[type] = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
timers[type].initWithCallback(function() {
delete timers[type];
((new Object({"app" : handleAppUpdated,
"plugins": handlePluginsChanged,
"addons" : handleAddonsChanged}))[type])();
}, 10000, Ci.nsITimer.TYPE_ONE_SHOT);
} else {
timers[type].delay = 10000;
}
}
}
function watchOneFile(aFile, aType) {
if (!aFile.exists() || !aFile.isFile()) {
return;
}
aFile.normalize();
let file = gio.g_file_new_for_path(aFile.path);
if (file.isNull()) {
ERROR("OOM: Failed to get GFile for path " + aFile.path);
return;
}
let mon = gio.g_file_monitor_file(file,
gio.GFileMonitorFlagsFlags.G_FILE_MONITOR_NONE,
null, null);
gobject.g_object_unref(file);
if (mon.isNull()) {
ERROR("Failed to create monitor for path " + aFile.path);
return;
}
let id = gobject.g_signal_connect(mon, "changed",
function(aMonitor, aFile, aOtherFile,
aEventType) {
handler(aFile, aEventType, false);
});
watches[aFile.path] = {monitor: mon, sig_id: id, type: aType};
LOG("Watching " + aFile.path);
}
function watchOneDir(aKey, aPaths, aType) {
let nsifile;
if (aKey instanceof Ci.nsIFile) {
nsifile = aKey;
aPaths.forEach(function(path) {
nsifile.append(path);
});
} else {
nsifile = FileUtils.getDir(aKey, aPaths);
}
if (!nsifile.exists() || !nsifile.isDirectory()) {
return;
}
nsifile.normalize();
if (nsifile.path in watches) {
return;
}
let file = gio.g_file_new_for_path(nsifile.path);
if (file.isNull()) {
ERROR("OOM: Failed to get GFile for path " + nsifile.path);
return;
}
let mon = gio.g_file_monitor_directory(file,
gio.GFileMonitorFlagsFlags.G_FILE_MONITOR_NONE,
null, null);
gobject.g_object_unref(file);
if (mon.isNull()) {
ERROR("Failed to create monitor for path " + nsifile.path);
return;
}
let id = gobject.g_signal_connect(mon, "changed",
function(aMonitor, aFile, aOtherFile,
aEventType) {
handler(aFile, aEventType, true);
});
watches[nsifile.path] = {monitor: mon, sig_id: id, type: aType};
LOG("Watching " + nsifile.path);
}
function watchList(aKey, aType, aFilterList) {
let e = Services.dirsvc.get(aKey, Ci.nsISimpleEnumerator);
let files = [];
while (e.hasMoreElements()) {
files.push(e.getNext().QueryInterface(Ci.nsIFile));
}
if (aFilterList) {
files = files.filter(function(aValue, aIndex, aArray) {
if (aFilterList.indexOf(aValue.parent.path) != -1) {
return true;
}
return false;
});
}
files.forEach(function(file) {
if (!(file.exists())) {
return;
}
if (file.isDirectory()) {
watchOneDir(file, [], aType);
} else {
watchOneFile(file, aType);
}
});
}
Services.obs.addObserver(function(aSubject, aTopic, aData) {
if (aSubject == "xpcom-shutdown") {
Services.obs.removeObserver(arguments.callee, "xpcom-shutdown", false);
for (let path in watches) {
gobject.g_signal_handler_disconnect(watches[path].monitor,
watches[path].sig_id);
gobject.g_object_unref(watches[path].monitor);
}
}
}, "xpcom-shutdown", false);
var idle = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
idle.initWithCallback(function() {
let kungFuDeathGrip = idle;
watchOneDir(NS_XPCOM_CURRENT_PROCESS_DIR, [], "app");
watchOneDir(NS_GRE_DIR, [], "app");
watchOneDir(NS_APP_PLUGINS_DIR, [], "plugins");
watchOneDir(NS_SYSTEM_PLUGINS_DIR, [], "plugins");
//watchOneDir(XRE_SYS_LOCAL_EXTENSION_PARENT_DIR,
// [Services.appinfo.ID], "addons");
//watchOneDir(XRE_SYS_SHARE_EXTENSION_PARENT_DIR,
// [Services.appinfo.ID], "addons");
//watchOneDir(NS_XPCOM_CURRENT_PROCESS_DIR,
// ["extensions"], "addons");
//watchList(XRE_EXTENSIONS_DIR_LIST, "addons",
// [FileUtils.getDir(XRE_SYS_LOCAL_EXTENSION_PARENT_DIR,
// [Services.appinfo.ID]).path,
// FileUtils.getDir(XRE_SYS_SHARE_EXTENSION_PARENT_DIR,
// [Services.appinfo.ID]).path,
// FileUtils.getDir(NS_XPCOM_CURRENT_PROCESS_DIR,
// ["extensions"]).path]);
idle.initWithCallback(function() {
let kungFuDeathGrip = idle;
// Would use the AddonManager here, but it doesn't expose full paths.
// We use a delay here to avoid starting the plugin host at startup
// if it isn't otherwise needed
LOG("Initializing plugin data");
Cc["@mozilla.org/plugin/host;1"].getService(Ci.nsIPluginHost)
.getPluginTags()
.forEach(function(aPluginTag) {
try {
plugins[aPluginTag.fullpath] = {
"path": aPluginTag.fullpath,
"name": aPluginTag.name,
"lastModifiedTime": (new FileUtils.File(aPluginTag.fullpath))
.lastModifiedTime
};
LOG("Found plugin \"" + aPluginTag.name + "\" at " +
aPluginTag.fullpath + ", lastModifiedTime: " +
plugins[aPluginTag.fullpath].lastModifiedTime);
} catch(e) {
delete plugins[aPluginTag.fullpath];
LOG("Plugin \"" + aPluginTag.name + "\" doesn't exist at " +
aPluginTag.fullpath);
}
});
}, 8000, Ci.nsITimer.TYPE_ONE_SHOT);
}, 0, Ci.nsITimer.TYPE_ONE_SHOT);
}
UpdateNotifier.prototype = {
classDescription: "Update Notifier",
classID: Components.ID("{799a4700-2085-40e8-853a-05dcf8e95e41}"),
contractID: "@ubuntu.com/update-notifier;1",
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports])
};
const NSGetFactory = XPCOMUtils.generateNSGetFactory([UpdateNotifier]);
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