зеркало из https://github.com/mozilla/gecko-dev.git
129 строки
3.5 KiB
JavaScript
129 строки
3.5 KiB
JavaScript
"use strict";
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this.EXPORTED_SYMBOLS = ["NewTabPrefsProvider"];
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const {interfaces: Ci, utils: Cu} = Components;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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XPCOMUtils.defineLazyGetter(this, "EventEmitter", function() {
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const {EventEmitter} = Cu.import("resource://gre/modules/EventEmitter.jsm", {});
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return EventEmitter;
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});
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// Supported prefs and data type
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const gPrefsMap = new Map([
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["browser.newtabpage.activity-stream.enabled", "bool"],
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["browser.newtabpage.enabled", "bool"],
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["browser.newtabpage.enhanced", "bool"],
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["browser.newtabpage.introShown", "bool"],
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["browser.newtabpage.updateIntroShown", "bool"],
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["browser.newtabpage.pinned", "str"],
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["browser.newtabpage.blocked", "str"],
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["browser.search.hiddenOneOffs", "str"],
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]);
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// prefs that are important for the newtab page
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const gNewtabPagePrefs = new Set([
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"browser.newtabpage.enabled",
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"browser.newtabpage.enhanced",
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"browser.newtabpage.pinned",
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"browser.newtabpage.blocked",
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"browser.newtabpage.introShown",
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"browser.newtabpage.updateIntroShown",
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"browser.search.hiddenOneOffs",
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]);
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let PrefsProvider = function PrefsProvider() {
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EventEmitter.decorate(this);
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};
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PrefsProvider.prototype = {
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observe(subject, topic, data) { // jshint ignore:line
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if (topic === "nsPref:changed") {
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if (gPrefsMap.has(data)) {
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switch (gPrefsMap.get(data)) {
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case "bool":
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this.emit(data, Services.prefs.getBoolPref(data, false));
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break;
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case "str":
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this.emit(data, Services.prefs.getStringPref(data, ""));
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break;
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case "localized":
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if (Services.prefs.getPrefType(data) == Ci.nsIPrefBranch.PREF_INVALID) {
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this.emit(data, "");
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} else {
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try {
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this.emit(data, Services.prefs.getComplexValue(data, Ci.nsIPrefLocalizedString));
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} catch (e) {
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this.emit(data, Services.prefs.getStringPref(data));
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}
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}
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break;
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default:
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this.emit(data);
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break;
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}
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}
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} else {
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Cu.reportError(new Error("NewTabPrefsProvider observing unknown topic"));
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}
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},
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/*
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* Return the preferences that are important to the newtab page
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*/
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get newtabPagePrefs() {
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let results = {};
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for (let pref of gNewtabPagePrefs) {
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results[pref] = null;
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if (Services.prefs.getPrefType(pref) != Ci.nsIPrefBranch.PREF_INVALID) {
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switch (gPrefsMap.get(pref)) {
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case "bool":
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results[pref] = Services.prefs.getBoolPref(pref);
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break;
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case "str":
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results[pref] = Services.prefs.getStringPref(pref);
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break;
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case "localized":
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try {
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results[pref] = Services.prefs.getComplexValue(pref, Ci.nsIPrefLocalizedString);
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} catch (e) {
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results[pref] = Services.prefs.getStringPref(pref);
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}
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break;
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}
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}
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}
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return results;
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},
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get prefsMap() {
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return gPrefsMap;
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},
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init() {
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for (let pref of gPrefsMap.keys()) {
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Services.prefs.addObserver(pref, this);
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}
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},
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uninit() {
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for (let pref of gPrefsMap.keys()) {
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Services.prefs.removeObserver(pref, this);
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}
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}
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};
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/**
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* Singleton that serves as the default new tab pref provider for the grid.
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*/
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const gPrefs = new PrefsProvider();
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let NewTabPrefsProvider = {
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prefs: gPrefs,
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newtabPagePrefSet: gNewtabPagePrefs,
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};
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