зеркало из https://github.com/mozilla/gecko-dev.git
107 строки
3.2 KiB
JavaScript
107 строки
3.2 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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"use strict";
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ChromeUtils.import("resource://gre/modules/AppConstants.jsm");
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ChromeUtils.import("resource://gre/modules/Preferences.jsm");
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ChromeUtils.import("resource://gre/modules/Services.jsm");
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const ACTIVITY_STREAM_PREF_BRANCH = "browser.newtabpage.activity-stream.";
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this.Prefs = class Prefs extends Preferences {
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/**
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* Prefs - A wrapper around Preferences that always sets the branch to
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* ACTIVITY_STREAM_PREF_BRANCH
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*/
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constructor(branch = ACTIVITY_STREAM_PREF_BRANCH) {
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super({branch});
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this._branchName = branch;
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this._branchObservers = new Map();
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}
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get branchName() {
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return this._branchName;
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}
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ignoreBranch(listener) {
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const observer = this._branchObservers.get(listener);
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this._prefBranch.removeObserver("", observer);
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this._branchObservers.delete(listener);
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}
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observeBranch(listener) {
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const observer = (subject, topic, pref) => {
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listener.onPrefChanged(pref, this.get(pref));
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};
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this._prefBranch.addObserver("", observer);
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this._branchObservers.set(listener, observer);
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}
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};
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this.DefaultPrefs = class DefaultPrefs {
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/**
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* DefaultPrefs - A helper for setting and resetting default prefs for the add-on
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*
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* @param {Map} config A Map with {string} key of the pref name and {object}
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* value with the following pref properties:
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* {string} .title (optional) A description of the pref
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* {bool|string|number} .value The default value for the pref
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* @param {string} branch (optional) The pref branch (defaults to ACTIVITY_STREAM_PREF_BRANCH)
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*/
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constructor(config, branch = ACTIVITY_STREAM_PREF_BRANCH) {
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this._config = config;
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this.branch = Services.prefs.getDefaultBranch(branch);
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}
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/**
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* setDefaultPref - Sets the default value (not user-defined) for a given pref
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*
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* @param {string} key The name of the pref
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* @param {type} val The default value of the pref
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*/
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setDefaultPref(key, val) {
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switch (typeof val) {
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case "boolean":
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this.branch.setBoolPref(key, val);
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break;
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case "number":
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this.branch.setIntPref(key, val);
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break;
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case "string":
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this.branch.setStringPref(key, val);
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break;
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}
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}
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/**
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* init - Set default prefs for all prefs in the config
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*/
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init() {
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// Local developer builds (with the default mozconfig) aren't OFFICIAL
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const IS_UNOFFICIAL_BUILD = !AppConstants.MOZILLA_OFFICIAL;
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for (const pref of this._config.keys()) {
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const prefConfig = this._config.get(pref);
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let value;
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if (IS_UNOFFICIAL_BUILD && "value_local_dev" in prefConfig) {
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value = prefConfig.value_local_dev;
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} else {
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value = prefConfig.value;
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}
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this.setDefaultPref(pref, value);
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}
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}
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/**
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* reset - Resets all user-defined prefs for prefs in ._config to their defaults
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*/
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reset() {
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for (const name of this._config.keys()) {
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this.branch.clearUserPref(name);
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}
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}
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};
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const EXPORTED_SYMBOLS = ["DefaultPrefs", "Prefs"];
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