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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
cr.define('options', function() {
/////////////////////////////////////////////////////////////////////////////
// Preferences class:
/**
* Preferences class manages access to Chrome profile preferences.
* @constructor
*/
function Preferences() {
}
cr.addSingletonGetter(Preferences);
/**
* Sets value of a boolean preference.
* and signals its changed value.
* @param {string} name Preference name.
* @param {boolean} value New preference value.
* @param {string} metric User metrics identifier.
*/
Preferences.setBooleanPref = function(name, value, metric) {
var argumentList = [name, Boolean(value)];
if (metric != undefined) argumentList.push(metric);
chrome.send('setBooleanPref', argumentList);
};
/**
* Sets value of an integer preference.
* and signals its changed value.
* @param {string} name Preference name.
* @param {number} value New preference value.
* @param {string} metric User metrics identifier.
*/
Preferences.setIntegerPref = function(name, value, metric) {
var argumentList = [name, Number(value)];
if (metric != undefined) argumentList.push(metric);
chrome.send('setIntegerPref', argumentList);
};
/**
* Sets value of a double-valued preference.
* and signals its changed value.
* @param {string} name Preference name.
* @param {number} value New preference value.
* @param {string} metric User metrics identifier.
*/
Preferences.setDoublePref = function(name, value, metric) {
var argumentList = [name, Number(value)];
if (metric != undefined) argumentList.push(metric);
chrome.send('setDoublePref', argumentList);
};
/**
* Sets value of a string preference.
* and signals its changed value.
* @param {string} name Preference name.
* @param {string} value New preference value.
* @param {string} metric User metrics identifier.
*/
Preferences.setStringPref = function(name, value, metric) {
var argumentList = [name, String(value)];
if (metric != undefined) argumentList.push(metric);
chrome.send('setStringPref', argumentList);
};
/**
* Sets value of a string preference that represents a URL
* and signals its changed value. The value will be fixed to be a valid URL.
* @param {string} name Preference name.
* @param {string} value New preference value.
* @param {string} metric User metrics identifier.
*/
Preferences.setURLPref = function(name, value, metric) {
var argumentList = [name, String(value)];
if (metric != undefined) argumentList.push(metric);
chrome.send('setURLPref', argumentList);
};
/**
* Sets value of a JSON list preference.
* and signals its changed value.
* @param {string} name Preference name.
* @param {Array} value New preference value.
* @param {string} metric User metrics identifier.
*/
Preferences.setListPref = function(name, value, metric) {
var argumentList = [name, JSON.stringify(value)];
if (metric != undefined) argumentList.push(metric);
chrome.send('setListPref', argumentList);
};
/**
* Clears value of a JSON preference.
* @param {string} name Preference name.
* @param {string} metric User metrics identifier.
*/
Preferences.clearPref = function(name, metric) {
var argumentList = [name];
if (metric != undefined) argumentList.push(metric);
chrome.send('clearPref', argumentList);
};
Preferences.prototype = {
__proto__: cr.EventTarget.prototype,
// Map of registered preferences.
registeredPreferences_: {},
/**
* Adds an event listener to the target.
* @param {string} type The name of the event.
* @param {!Function|{handleEvent:Function}} handler The handler for the
* event. This is called when the event is dispatched.
*/
addEventListener: function(type, handler) {
cr.EventTarget.prototype.addEventListener.call(this, type, handler);
this.registeredPreferences_[type] = true;
},
/**
* Initializes preference reading and change notifications.
*/
initialize: function() {
var params1 = ['Preferences.prefsFetchedCallback'];
var params2 = ['Preferences.prefsChangedCallback'];
for (var prefName in this.registeredPreferences_) {
params1.push(prefName);
params2.push(prefName);
}
chrome.send('fetchPrefs', params1);
chrome.send('observePrefs', params2);
},
/**
* Helper function for flattening of dictionary passed via fetchPrefs
* callback.
* @param {string} prefix Preference name prefix.
* @param {object} dict Map with preference values.
*/
flattenMapAndDispatchEvent_: function(prefix, dict) {
for (var prefName in dict) {
if (typeof dict[prefName] == 'object' &&
!this.registeredPreferences_[prefix + prefName]) {
this.flattenMapAndDispatchEvent_(prefix + prefName + '.',
dict[prefName]);
} else {
var event = new cr.Event(prefix + prefName);
event.value = dict[prefName];
this.dispatchEvent(event);
}
}
}
};
/**
* Callback for fetchPrefs method.
* @param {object} dict Map of fetched property values.
*/
Preferences.prefsFetchedCallback = function(dict) {
Preferences.getInstance().flattenMapAndDispatchEvent_('', dict);
};
/**
* Callback for observePrefs method.
* @param {array} notification An array defining changed preference values.
* notification[0] contains name of the change preference while its new value
* is stored in notification[1].
*/
Preferences.prefsChangedCallback = function(notification) {
var event = new cr.Event(notification[0]);
event.value = notification[1];
Preferences.getInstance().dispatchEvent(event);
};
// Export
return {
Preferences: Preferences
};
});
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