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// Copyright (c) 2012 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() {
/** @const */ var SettingsDialog = options.SettingsDialog;
/**
* A dialog that will pop up when the user attempts to set the value of the
* Boolean |pref| to |true|, asking for confirmation. If the user clicks OK,
* the new value is committed to Chrome. If the user clicks Cancel or leaves
* the settings page, the new value is discarded.
* @constructor
* @param {string} name See Page constructor.
* @param {string} title See Page constructor.
* @param {string} pageDivName See Page constructor.
* @param {HTMLButtonElement} okButton The confirmation button element.
* @param {HTMLButtonElement} cancelButton The cancellation button element.
* @param {string} pref The pref that requires confirmation.
* @param {string} metric User metrics identifier.
* @param {string=} opt_confirmedPref A pref used to remember whether the
* user has confirmed the dialog before. This ensures that the user is
* presented with the dialog only once. If left |undefined|, the dialog
* will pop up every time the user attempts to set |pref| to |true|.
* @extends {options.SettingsDialog}
*/
function ConfirmDialog(name, title, pageDivName, okButton, cancelButton, pref,
metric, opt_confirmedPref) {
SettingsDialog.call(this, name, title, pageDivName, okButton, cancelButton);
/** @protected */
this.pref = pref;
/** @protected */
this.metric = metric;
/** @private */
this.confirmedPref_ = opt_confirmedPref;
/** @private */
this.confirmed_ = false;
}
ConfirmDialog.prototype = {
// Set up the prototype chain
__proto__: SettingsDialog.prototype,
/**
* Handle changes to |pref|. Only uncommitted changes are relevant as these
* originate from user and need to be explicitly committed to take effect.
* Pop up the dialog or commit the change, depending on whether confirmation
* is needed.
* @param {Event} event Change event.
* @private
*/
onPrefChanged_: function(event) {
if (!event.value.uncommitted)
return;
if (event.value.value && !this.confirmed_)
PageManager.showPageByName(this.name, false);
else
Preferences.getInstance().commitPref(this.pref, this.metric);
},
/**
* Handle changes to |confirmedPref_| by caching them.
* @param {Event} event Change event.
* @private
*/
onConfirmedChanged_: function(event) {
this.confirmed_ = event.value.value;
},
/** @override */
initializePage: function() {
SettingsDialog.prototype.initializePage.call(this);
this.okButton.onclick = this.handleConfirm.bind(this);
this.cancelButton.onclick = this.handleCancel.bind(this);
Preferences.getInstance().addEventListener(
this.pref, this.onPrefChanged_.bind(this));
if (this.confirmedPref_) {
Preferences.getInstance().addEventListener(
this.confirmedPref_, this.onConfirmedChanged_.bind(this));
}
},
/**
* Handle the confirm button by committing the |pref| change. If
* |confirmedPref_| has been specified, also remember that the dialog has
* been confirmed to avoid bringing it up in the future.
* @override
*/
handleConfirm: function() {
SettingsDialog.prototype.handleConfirm.call(this);
Preferences.getInstance().commitPref(this.pref, this.metric);
if (this.confirmedPref_)
Preferences.setBooleanPref(this.confirmedPref_, true, true);
},
/**
* Handle the cancel button by rolling back the |pref| change without it
* ever taking effect.
* @override
*/
handleCancel: function() {
SettingsDialog.prototype.handleCancel.call(this);
Preferences.getInstance().rollbackPref(this.pref);
},
/**
* When a user navigates away from a confirm dialog, treat as a cancel.
* @protected
* @override
*/
willHidePage: function() {
if (this.visible)
Preferences.getInstance().rollbackPref(this.pref);
},
};
return {
ConfirmDialog: ConfirmDialog
};
});
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