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// Copyright 2014 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.
/**
* @fileoverview Base class for implementing earcons.
*
* When adding earcons, please add them to getEarconName and getEarconId.
*
*/
goog.provide('cvox.AbstractEarcons');
goog.provide('cvox.Earcon');
/**
* Earcon names.
* @enum {string}
*/
cvox.Earcon = {
ALERT_MODAL: 'alert_modal',
ALERT_NONMODAL: 'alert_nonmodal',
BUTTON: 'button',
CHECK_OFF: 'check_off',
CHECK_ON: 'check_on',
EDITABLE_TEXT: 'editable_text',
INVALID_KEYPRESS: 'invalid_keypress',
LINK: 'link',
LISTBOX: 'listbox',
LIST_ITEM: 'list_item',
LONG_DESC: 'long_desc',
MATH: 'math',
OBJECT_CLOSE: 'object_close',
OBJECT_ENTER: 'object_enter',
OBJECT_EXIT: 'object_exit',
OBJECT_OPEN: 'object_open',
OBJECT_SELECT: 'object_select',
PAGE_FINISH_LOADING: 'page_finish_loading',
PAGE_START_LOADING: 'page_start_loading',
RECOVER_FOCUS: 'recover_focus',
SELECTION: 'selection',
SELECTION_REVERSE: 'selection_reverse',
SKIP: 'skip',
WRAP: 'wrap',
WRAP_EDGE: 'wrap_edge',
};
/**
* @constructor
*/
cvox.AbstractEarcons = function() {
/**
* Public flag set to enable or disable earcons. Callers should prefer
* toggle(); however, this member is public for initialization.
* @type {boolean}
*/
this.enabled = true;
};
/**
* Plays the specified earcon sound.
* @param {cvox.Earcon} earcon An earcon identifier.
*/
cvox.AbstractEarcons.prototype.playEarcon = function(earcon) {
};
/**
* Whether or not earcons are available.
* @return {boolean} True if earcons are available.
*/
cvox.AbstractEarcons.prototype.earconsAvailable = function() {
return true;
};
/**
* Toggles earcons on or off.
* @return {boolean} True if earcons are now enabled; false otherwise.
*/
cvox.AbstractEarcons.prototype.toggle = function() {
this.enabled = !this.enabled;
return this.enabled;
};
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