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gecko-dev/toolkit/mozapps/extensions/LightweightThemeManager.jsm

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JavaScript
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/* 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";
this.EXPORTED_SYMBOLS = ["LightweightThemeManager"];
const Cc = Components.classes;
const Ci = Components.interfaces;
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
Components.utils.import("resource://gre/modules/AddonManager.jsm");
/*globals AddonManagerPrivate*/
Components.utils.import("resource://gre/modules/Services.jsm");
const ID_SUFFIX = "@personas.mozilla.org";
const PREF_LWTHEME_TO_SELECT = "extensions.lwThemeToSelect";
const PREF_GENERAL_SKINS_SELECTEDSKIN = "general.skins.selectedSkin";
const PREF_EM_DSS_ENABLED = "extensions.dss.enabled";
const ADDON_TYPE = "theme";
const URI_EXTENSION_STRINGS = "chrome://mozapps/locale/extensions/extensions.properties";
const STRING_TYPE_NAME = "type.%ID%.name";
const DEFAULT_MAX_USED_THEMES_COUNT = 30;
const MAX_PREVIEW_SECONDS = 30;
const MANDATORY = ["id", "name", "headerURL"];
const OPTIONAL = ["footerURL", "textcolor", "accentcolor", "iconURL",
"previewURL", "author", "description", "homepageURL",
"updateURL", "version"];
const PERSIST_ENABLED = true;
const PERSIST_BYPASS_CACHE = false;
const PERSIST_FILES = {
headerURL: "lightweighttheme-header",
footerURL: "lightweighttheme-footer"
};
XPCOMUtils.defineLazyModuleGetter(this, "LightweightThemeImageOptimizer",
"resource://gre/modules/addons/LightweightThemeImageOptimizer.jsm");
XPCOMUtils.defineLazyGetter(this, "_prefs", () => {
return Services.prefs.getBranch("lightweightThemes.");
});
Object.defineProperty(this, "_maxUsedThemes", {
get: function() {
delete this._maxUsedThemes;
try {
this._maxUsedThemes = _prefs.getIntPref("maxUsedThemes");
}
catch (e) {
this._maxUsedThemes = DEFAULT_MAX_USED_THEMES_COUNT;
}
return this._maxUsedThemes;
},
set: function(val) {
delete this._maxUsedThemes;
return this._maxUsedThemes = val;
},
configurable: true,
});
// Holds the ID of the theme being enabled or disabled while sending out the
// events so cached AddonWrapper instances can return correct values for
// permissions and pendingOperations
var _themeIDBeingEnabled = null;
var _themeIDBeingDisabled = null;
// Convert from the old storage format (in which the order of usedThemes
// was combined with isThemeSelected to determine which theme was selected)
// to the new one (where a selectedThemeID determines which theme is selected).
(function() {
let wasThemeSelected = false;
try {
wasThemeSelected = _prefs.getBoolPref("isThemeSelected");
} catch (e) { }
if (wasThemeSelected) {
_prefs.clearUserPref("isThemeSelected");
let themes = [];
try {
themes = JSON.parse(_prefs.getComplexValue("usedThemes",
Ci.nsISupportsString).data);
} catch (e) { }
if (Array.isArray(themes) && themes[0]) {
_prefs.setCharPref("selectedThemeID", themes[0].id);
}
}
})();
this.LightweightThemeManager = {
get name() {
return "LightweightThemeManager";
},
// Themes that can be added for an application. They can't be removed, and
// will always show up at the top of the list.
_builtInThemes: new Map(),
get usedThemes () {
let themes = [];
try {
themes = JSON.parse(_prefs.getComplexValue("usedThemes",
Ci.nsISupportsString).data);
} catch (e) { }
themes.push(...this._builtInThemes.values());
return themes;
},
get currentTheme () {
let selectedThemeID = null;
try {
selectedThemeID = _prefs.getCharPref("selectedThemeID");
} catch (e) {}
let data = null;
if (selectedThemeID) {
data = this.getUsedTheme(selectedThemeID);
}
return data;
},
get currentThemeForDisplay () {
var data = this.currentTheme;
if (data && PERSIST_ENABLED) {
for (let key in PERSIST_FILES) {
try {
if (data[key] && _prefs.getBoolPref("persisted." + key))
data[key] = _getLocalImageURI(PERSIST_FILES[key]).spec
+ "?" + data.id + ";" + _version(data);
} catch (e) {}
}
}
return data;
},
set currentTheme (aData) {
return _setCurrentTheme(aData, false);
},
setLocalTheme: function(aData) {
_setCurrentTheme(aData, true);
},
getUsedTheme: function(aId) {
var usedThemes = this.usedThemes;
for (let usedTheme of usedThemes) {
if (usedTheme.id == aId)
return usedTheme;
}
return null;
},
forgetUsedTheme: function(aId) {
let theme = this.getUsedTheme(aId);
if (!theme || LightweightThemeManager._builtInThemes.has(theme.id))
return;
let wrapper = new AddonWrapper(theme);
AddonManagerPrivate.callAddonListeners("onUninstalling", wrapper, false);
var currentTheme = this.currentTheme;
if (currentTheme && currentTheme.id == aId) {
this.themeChanged(null);
AddonManagerPrivate.notifyAddonChanged(null, ADDON_TYPE, false);
}
_updateUsedThemes(_usedThemesExceptId(aId));
AddonManagerPrivate.callAddonListeners("onUninstalled", wrapper);
},
addBuiltInTheme: function(theme) {
if (!theme || !theme.id || this.usedThemes.some(t => t.id == theme.id)) {
throw new Error("Trying to add invalid builtIn theme");
}
this._builtInThemes.set(theme.id, theme);
},
forgetBuiltInTheme: function(id) {
if (!this._builtInThemes.has(id)) {
let currentTheme = this.currentTheme;
if (currentTheme && currentTheme.id == id) {
this.currentTheme = null;
}
}
return this._builtInThemes.delete(id);
},
clearBuiltInThemes: function() {
for (let id of this._builtInThemes.keys()) {
this.forgetBuiltInTheme(id);
}
},
previewTheme: function(aData) {
let cancel = Cc["@mozilla.org/supports-PRBool;1"].createInstance(Ci.nsISupportsPRBool);
cancel.data = false;
Services.obs.notifyObservers(cancel, "lightweight-theme-preview-requested",
JSON.stringify(aData));
if (cancel.data)
return;
if (_previewTimer)
_previewTimer.cancel();
else
_previewTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
_previewTimer.initWithCallback(_previewTimerCallback,
MAX_PREVIEW_SECONDS * 1000,
_previewTimer.TYPE_ONE_SHOT);
_notifyWindows(aData);
},
resetPreview: function() {
if (_previewTimer) {
_previewTimer.cancel();
_previewTimer = null;
_notifyWindows(this.currentThemeForDisplay);
}
},
parseTheme: function(aString, aBaseURI) {
try {
return _sanitizeTheme(JSON.parse(aString), aBaseURI, false);
} catch (e) {
return null;
}
},
updateCurrentTheme: function() {
try {
if (!_prefs.getBoolPref("update.enabled"))
return;
} catch (e) {
return;
}
var theme = this.currentTheme;
if (!theme || !theme.updateURL)
return;
var req = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"]
.createInstance(Ci.nsIXMLHttpRequest);
req.mozBackgroundRequest = true;
req.overrideMimeType("text/plain");
req.open("GET", theme.updateURL, true);
// Prevent the request from reading from the cache.
req.channel.loadFlags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
// Prevent the request from writing to the cache.
req.channel.loadFlags |= Ci.nsIRequest.INHIBIT_CACHING;
req.addEventListener("load", () => {
if (req.status != 200)
return;
let newData = this.parseTheme(req.responseText, theme.updateURL);
if (!newData ||
newData.id != theme.id ||
_version(newData) == _version(theme))
return;
var currentTheme = this.currentTheme;
if (currentTheme && currentTheme.id == theme.id)
this.currentTheme = newData;
}, false);
req.send(null);
},
/**
* Switches to a new lightweight theme.
*
* @param aData
* The lightweight theme to switch to
*/
themeChanged: function(aData) {
if (_previewTimer) {
_previewTimer.cancel();
_previewTimer = null;
}
if (aData) {
let usedThemes = _usedThemesExceptId(aData.id);
usedThemes.unshift(aData);
_updateUsedThemes(usedThemes);
if (PERSIST_ENABLED) {
LightweightThemeImageOptimizer.purge();
_persistImages(aData, function() {
_notifyWindows(this.currentThemeForDisplay);
}.bind(this));
}
}
if (aData)
_prefs.setCharPref("selectedThemeID", aData.id);
else
_prefs.setCharPref("selectedThemeID", "");
_notifyWindows(aData);
Services.obs.notifyObservers(null, "lightweight-theme-changed", null);
},
/**
* Starts the Addons provider and enables the new lightweight theme if
* necessary.
*/
startup: function() {
if (Services.prefs.prefHasUserValue(PREF_LWTHEME_TO_SELECT)) {
let id = Services.prefs.getCharPref(PREF_LWTHEME_TO_SELECT);
if (id)
this.themeChanged(this.getUsedTheme(id));
else
this.themeChanged(null);
Services.prefs.clearUserPref(PREF_LWTHEME_TO_SELECT);
}
_prefs.addObserver("", _prefObserver, false);
},
/**
* Shuts down the provider.
*/
shutdown: function() {
_prefs.removeObserver("", _prefObserver);
},
/**
* Called when a new add-on has been enabled when only one add-on of that type
* can be enabled.
*
* @param aId
* The ID of the newly enabled add-on
* @param aType
* The type of the newly enabled add-on
* @param aPendingRestart
* true if the newly enabled add-on will only become enabled after a
* restart
*/
addonChanged: function(aId, aType, aPendingRestart) {
if (aType != ADDON_TYPE)
return;
let id = _getInternalID(aId);
let current = this.currentTheme;
try {
let next = Services.prefs.getCharPref(PREF_LWTHEME_TO_SELECT);
if (id == next && aPendingRestart)
return;
Services.prefs.clearUserPref(PREF_LWTHEME_TO_SELECT);
if (next) {
AddonManagerPrivate.callAddonListeners("onOperationCancelled",
new AddonWrapper(this.getUsedTheme(next)));
}
else if (id == current.id) {
AddonManagerPrivate.callAddonListeners("onOperationCancelled",
new AddonWrapper(current));
return;
}
}
catch (e) {
}
if (current) {
if (current.id == id)
return;
_themeIDBeingDisabled = current.id;
let wrapper = new AddonWrapper(current);
if (aPendingRestart) {
Services.prefs.setCharPref(PREF_LWTHEME_TO_SELECT, "");
AddonManagerPrivate.callAddonListeners("onDisabling", wrapper, true);
}
else {
AddonManagerPrivate.callAddonListeners("onDisabling", wrapper, false);
this.themeChanged(null);
AddonManagerPrivate.callAddonListeners("onDisabled", wrapper);
}
_themeIDBeingDisabled = null;
}
if (id) {
let theme = this.getUsedTheme(id);
_themeIDBeingEnabled = id;
let wrapper = new AddonWrapper(theme);
if (aPendingRestart) {
AddonManagerPrivate.callAddonListeners("onEnabling", wrapper, true);
Services.prefs.setCharPref(PREF_LWTHEME_TO_SELECT, id);
// Flush the preferences to disk so they survive any crash
Services.prefs.savePrefFile(null);
}
else {
AddonManagerPrivate.callAddonListeners("onEnabling", wrapper, false);
this.themeChanged(theme);
AddonManagerPrivate.callAddonListeners("onEnabled", wrapper);
}
_themeIDBeingEnabled = null;
}
},
/**
* Called to get an Addon with a particular ID.
*
* @param aId
* The ID of the add-on to retrieve
* @param aCallback
* A callback to pass the Addon to
*/
getAddonByID: function(aId, aCallback) {
let id = _getInternalID(aId);
if (!id) {
aCallback(null);
return;
}
let theme = this.getUsedTheme(id);
if (!theme) {
aCallback(null);
return;
}
aCallback(new AddonWrapper(theme));
},
/**
* Called to get Addons of a particular type.
*
* @param aTypes
* An array of types to fetch. Can be null to get all types.
* @param aCallback
* A callback to pass an array of Addons to
*/
getAddonsByTypes: function(aTypes, aCallback) {
if (aTypes && aTypes.indexOf(ADDON_TYPE) == -1) {
aCallback([]);
return;
}
aCallback(this.usedThemes.map(a => new AddonWrapper(a)));
},
};
const wrapperMap = new WeakMap();
let themeFor = wrapper => wrapperMap.get(wrapper);
/**
* The AddonWrapper wraps lightweight theme to provide the data visible to
* consumers of the AddonManager API.
*/
function AddonWrapper(aTheme) {
wrapperMap.set(this, aTheme);
}
AddonWrapper.prototype = {
get id() {
return themeFor(this).id + ID_SUFFIX;
},
get type() {
return ADDON_TYPE;
},
get isActive() {
let current = LightweightThemeManager.currentTheme;
if (current)
return themeFor(this).id == current.id;
return false;
},
get name() {
return themeFor(this).name;
},
get version() {
let theme = themeFor(this);
return "version" in theme ? theme.version : "";
},
get creator() {
let theme = themeFor(this);
return "author" in theme ? new AddonManagerPrivate.AddonAuthor(theme.author) : null;
},
get screenshots() {
let url = themeFor(this).previewURL;
return [new AddonManagerPrivate.AddonScreenshot(url)];
},
get pendingOperations() {
let pending = AddonManager.PENDING_NONE;
if (this.isActive == this.userDisabled)
pending |= this.isActive ? AddonManager.PENDING_DISABLE : AddonManager.PENDING_ENABLE;
return pending;
},
get operationsRequiringRestart() {
// If a non-default theme is in use then a restart will be required to
// enable lightweight themes unless dynamic theme switching is enabled
if (Services.prefs.prefHasUserValue(PREF_GENERAL_SKINS_SELECTEDSKIN)) {
try {
if (Services.prefs.getBoolPref(PREF_EM_DSS_ENABLED))
return AddonManager.OP_NEEDS_RESTART_NONE;
}
catch (e) {
}
return AddonManager.OP_NEEDS_RESTART_ENABLE;
}
return AddonManager.OP_NEEDS_RESTART_NONE;
},
get size() {
// The size changes depending on whether the theme is in use or not, this is
// probably not worth exposing.
return null;
},
get permissions() {
let permissions = 0;
// Do not allow uninstall of builtIn themes.
if (!LightweightThemeManager._builtInThemes.has(themeFor(this).id))
permissions = AddonManager.PERM_CAN_UNINSTALL;
if (this.userDisabled)
permissions |= AddonManager.PERM_CAN_ENABLE;
else
permissions |= AddonManager.PERM_CAN_DISABLE;
return permissions;
},
get userDisabled() {
let id = themeFor(this).id;
if (_themeIDBeingEnabled == id)
return false;
if (_themeIDBeingDisabled == id)
return true;
try {
let toSelect = Services.prefs.getCharPref(PREF_LWTHEME_TO_SELECT);
return id != toSelect;
}
catch (e) {
let current = LightweightThemeManager.currentTheme;
return !current || current.id != id;
}
},
set userDisabled(val) {
if (val == this.userDisabled)
return val;
if (val)
LightweightThemeManager.currentTheme = null;
else
LightweightThemeManager.currentTheme = themeFor(this);
return val;
},
// Lightweight themes are never disabled by the application
get appDisabled() {
return false;
},
// Lightweight themes are always compatible
get isCompatible() {
return true;
},
get isPlatformCompatible() {
return true;
},
get scope() {
return AddonManager.SCOPE_PROFILE;
},
get foreignInstall() {
return false;
},
uninstall: function() {
LightweightThemeManager.forgetUsedTheme(themeFor(this).id);
},
cancelUninstall: function() {
throw new Error("Theme is not marked to be uninstalled");
},
findUpdates: function(listener, reason, appVersion, platformVersion) {
AddonManagerPrivate.callNoUpdateListeners(this, listener, reason, appVersion, platformVersion);
},
// Lightweight themes are always compatible
isCompatibleWith: function(appVersion, platformVersion) {
return true;
},
// Lightweight themes are always securely updated
get providesUpdatesSecurely() {
return true;
},
// Lightweight themes are never blocklisted
get blocklistState() {
return Ci.nsIBlocklistService.STATE_NOT_BLOCKED;
}
};
["description", "homepageURL", "iconURL"].forEach(function(prop) {
Object.defineProperty(AddonWrapper.prototype, prop, {
get: function() {
let theme = themeFor(this);
return prop in theme ? theme[prop] : null;
},
enumarable: true,
});
});
["installDate", "updateDate"].forEach(function(prop) {
Object.defineProperty(AddonWrapper.prototype, prop, {
get: function() {
let theme = themeFor(this);
return prop in theme ? new Date(theme[prop]) : null;
},
enumarable: true,
});
});
/**
* Converts the ID used by the public AddonManager API to an lightweight theme
* ID.
*
* @param id
* The ID to be converted
*
* @return the lightweight theme ID or null if the ID was not for a lightweight
* theme.
*/
function _getInternalID(id) {
if (!id)
return null;
let len = id.length - ID_SUFFIX.length;
if (len > 0 && id.substring(len) == ID_SUFFIX)
return id.substring(0, len);
return null;
}
function _setCurrentTheme(aData, aLocal) {
aData = _sanitizeTheme(aData, null, aLocal);
let needsRestart = (ADDON_TYPE == "theme") &&
Services.prefs.prefHasUserValue(PREF_GENERAL_SKINS_SELECTEDSKIN);
let cancel = Cc["@mozilla.org/supports-PRBool;1"].createInstance(Ci.nsISupportsPRBool);
cancel.data = false;
Services.obs.notifyObservers(cancel, "lightweight-theme-change-requested",
JSON.stringify(aData));
if (aData) {
let theme = LightweightThemeManager.getUsedTheme(aData.id);
let isInstall = !theme || theme.version != aData.version;
if (isInstall) {
aData.updateDate = Date.now();
if (theme && "installDate" in theme)
aData.installDate = theme.installDate;
else
aData.installDate = aData.updateDate;
var oldWrapper = theme ? new AddonWrapper(theme) : null;
var wrapper = new AddonWrapper(aData);
AddonManagerPrivate.callInstallListeners("onExternalInstall", null,
wrapper, oldWrapper, false);
AddonManagerPrivate.callAddonListeners("onInstalling", wrapper, false);
}
let current = LightweightThemeManager.currentTheme;
let usedThemes = _usedThemesExceptId(aData.id);
if (current && current.id != aData.id)
usedThemes.splice(1, 0, aData);
else
usedThemes.unshift(aData);
_updateUsedThemes(usedThemes);
if (isInstall)
AddonManagerPrivate.callAddonListeners("onInstalled", wrapper);
}
if (cancel.data)
return null;
AddonManagerPrivate.notifyAddonChanged(aData ? aData.id + ID_SUFFIX : null,
ADDON_TYPE, needsRestart);
return LightweightThemeManager.currentTheme;
}
function _sanitizeTheme(aData, aBaseURI, aLocal) {
if (!aData || typeof aData != "object")
return null;
var resourceProtocols = ["http", "https", "resource"];
if (aLocal)
resourceProtocols.push("file");
var resourceProtocolExp = new RegExp("^(" + resourceProtocols.join("|") + "):");
function sanitizeProperty(prop) {
if (!(prop in aData))
return null;
if (typeof aData[prop] != "string")
return null;
let val = aData[prop].trim();
if (!val)
return null;
if (!/URL$/.test(prop))
return val;
try {
val = _makeURI(val, aBaseURI ? _makeURI(aBaseURI) : null).spec;
if ((prop == "updateURL" ? /^https:/ : resourceProtocolExp).test(val))
return val;
return null;
}
catch (e) {
return null;
}
}
let result = {};
for (let mandatoryProperty of MANDATORY) {
let val = sanitizeProperty(mandatoryProperty);
if (!val)
throw Components.results.NS_ERROR_INVALID_ARG;
result[mandatoryProperty] = val;
}
for (let optionalProperty of OPTIONAL) {
let val = sanitizeProperty(optionalProperty);
if (!val)
continue;
result[optionalProperty] = val;
}
return result;
}
function _usedThemesExceptId(aId) {
return LightweightThemeManager.usedThemes.filter(function(t) {
return "id" in t && t.id != aId;
});
}
function _version(aThemeData) {
return aThemeData.version || "";
}
function _makeURI(aURL, aBaseURI) {
return Services.io.newURI(aURL, null, aBaseURI);
}
function _updateUsedThemes(aList) {
// Remove app-specific themes before saving them to the usedThemes pref.
aList = aList.filter(theme => !LightweightThemeManager._builtInThemes.has(theme.id));
// Send uninstall events for all themes that need to be removed.
while (aList.length > _maxUsedThemes) {
let wrapper = new AddonWrapper(aList[aList.length - 1]);
AddonManagerPrivate.callAddonListeners("onUninstalling", wrapper, false);
aList.pop();
AddonManagerPrivate.callAddonListeners("onUninstalled", wrapper);
}
var str = Cc["@mozilla.org/supports-string;1"]
.createInstance(Ci.nsISupportsString);
str.data = JSON.stringify(aList);
_prefs.setComplexValue("usedThemes", Ci.nsISupportsString, str);
Services.obs.notifyObservers(null, "lightweight-theme-list-changed", null);
}
function _notifyWindows(aThemeData) {
Services.obs.notifyObservers(null, "lightweight-theme-styling-update",
JSON.stringify(aThemeData));
}
var _previewTimer;
var _previewTimerCallback = {
notify: function() {
LightweightThemeManager.resetPreview();
}
};
/**
* Called when any of the lightweightThemes preferences are changed.
*/
function _prefObserver(aSubject, aTopic, aData) {
switch (aData) {
case "maxUsedThemes":
try {
_maxUsedThemes = _prefs.getIntPref(aData);
}
catch (e) {
_maxUsedThemes = DEFAULT_MAX_USED_THEMES_COUNT;
}
// Update the theme list to remove any themes over the number we keep
_updateUsedThemes(LightweightThemeManager.usedThemes);
break;
}
}
function _persistImages(aData, aCallback) {
function onSuccess(key) {
return function () {
let current = LightweightThemeManager.currentTheme;
if (current && current.id == aData.id) {
_prefs.setBoolPref("persisted." + key, true);
}
if (--numFilesToPersist == 0 && aCallback) {
aCallback();
}
};
}
let numFilesToPersist = 0;
for (let key in PERSIST_FILES) {
_prefs.setBoolPref("persisted." + key, false);
if (aData[key]) {
numFilesToPersist++;
_persistImage(aData[key], PERSIST_FILES[key], onSuccess(key));
}
}
}
function _getLocalImageURI(localFileName) {
var localFile = Services.dirsvc.get("ProfD", Ci.nsIFile);
localFile.append(localFileName);
return Services.io.newFileURI(localFile);
}
function _persistImage(sourceURL, localFileName, successCallback) {
if (/^(file|resource):/.test(sourceURL))
return;
var targetURI = _getLocalImageURI(localFileName);
var sourceURI = _makeURI(sourceURL);
var persist = Cc["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"]
.createInstance(Ci.nsIWebBrowserPersist);
persist.persistFlags =
Ci.nsIWebBrowserPersist.PERSIST_FLAGS_REPLACE_EXISTING_FILES |
Ci.nsIWebBrowserPersist.PERSIST_FLAGS_AUTODETECT_APPLY_CONVERSION |
(PERSIST_BYPASS_CACHE ?
Ci.nsIWebBrowserPersist.PERSIST_FLAGS_BYPASS_CACHE :
Ci.nsIWebBrowserPersist.PERSIST_FLAGS_FROM_CACHE);
persist.progressListener = new _persistProgressListener(successCallback);
persist.saveURI(sourceURI, null,
null, Ci.nsIHttpChannel.REFERRER_POLICY_NO_REFERRER_WHEN_DOWNGRADE,
null, null, targetURI, null);
}
function _persistProgressListener(successCallback) {
this.onLocationChange = function() {};
this.onProgressChange = function() {};
this.onStatusChange = function() {};
this.onSecurityChange = function() {};
this.onStateChange = function(aWebProgress, aRequest, aStateFlags, aStatus) {
if (aRequest &&
aStateFlags & Ci.nsIWebProgressListener.STATE_IS_NETWORK &&
aStateFlags & Ci.nsIWebProgressListener.STATE_STOP) {
try {
if (aRequest.QueryInterface(Ci.nsIHttpChannel).requestSucceeded) {
// success
successCallback();
return;
}
} catch (e) { }
// failure
}
};
}
AddonManagerPrivate.registerProvider(LightweightThemeManager, [
new AddonManagerPrivate.AddonType("theme", URI_EXTENSION_STRINGS,
STRING_TYPE_NAME,
AddonManager.VIEW_TYPE_LIST, 5000)
]);
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