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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /toolkit/mozapps/extensions/LightweightThemeManager.jsm
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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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.defineLazyModuleGetter(this, "ServiceRequest",
+ "resource://gre/modules/ServiceRequest.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);
+
+ if (_prefs.getCharPref("selectedThemeID") == theme.id) {
+ this.currentTheme = 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 = new ServiceRequest();
+
+ 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)
+]);