зеркало из https://github.com/mozilla/gecko-dev.git
59 строки
2.1 KiB
JavaScript
59 строки
2.1 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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var EXPORTED_SYMBOLS = ["LightweightThemeConsumer"];
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const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
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const {LightweightThemeManager} = ChromeUtils.import("resource://gre/modules/LightweightThemeManager.jsm");
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ChromeUtils.defineModuleGetter(this, "EventDispatcher",
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"resource://gre/modules/Messaging.jsm");
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ChromeUtils.defineModuleGetter(this, "LightweightThemePersister",
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"resource://gre/modules/addons/LightweightThemePersister.jsm");
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const DEFAULT_THEME_ID = "default-theme@mozilla.org";
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function LightweightThemeConsumer(aDocument) {
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this._doc = aDocument;
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Services.obs.addObserver(this, "lightweight-theme-styling-update");
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Services.obs.addObserver(this, "lightweight-theme-apply");
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this._update(LightweightThemeManager.currentThemeWithFallback);
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}
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LightweightThemeConsumer.prototype = {
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observe: function(aSubject, aTopic, aData) {
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if (aTopic == "lightweight-theme-styling-update") {
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let parsedData = JSON.parse(aData);
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if (!parsedData) {
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parsedData = { theme: null };
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}
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this._update(parsedData.theme);
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} else if (aTopic == "lightweight-theme-apply") {
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this._update(LightweightThemeManager.currentThemeWithFallback);
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}
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},
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destroy: function() {
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Services.obs.removeObserver(this, "lightweight-theme-styling-update");
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Services.obs.removeObserver(this, "lightweight-theme-apply");
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this._doc = null;
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},
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_update: function(aData) {
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let active = aData && aData.id !== DEFAULT_THEME_ID;
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let msg = active ? { type: "LightweightTheme:Update" } :
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{ type: "LightweightTheme:Disable" };
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if (active) {
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LightweightThemePersister.persistImages(aData, () => {
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msg.data = LightweightThemePersister.getPersistedData(aData);
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EventDispatcher.instance.sendRequest(msg);
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});
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} else {
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EventDispatcher.instance.sendRequest(msg);
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}
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},
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};
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