Make earcon ids strings instead of numbers.

chrome/browser/resources/chromeos/chromevox/host/interface/abstract_earcons.js

 // 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',
+  BULLET: 'bullet',
+  BUSY_PROGRESS_LOOP: 'busy_progress_loop',
+  BUTTON: 'button',
+  CHECK_OFF: 'check_off',
+  CHECK_ON: 'check_on',
+  EDITABLE_TEXT: 'editable_text',
+  FONT_CHANGE: 'font_change',
+  INVALID_KEYPRESS: 'invalid_keypress',
+  LINK: 'link',
+  LISTBOX: 'listbox',
+  LIST_ITEM: 'bullet',
+  LONG_DESC: 'long_desc',
+  OBJECT_CLOSE: 'object_close',
+  OBJECT_ENTER: 'object_enter',
+  OBJECT_EXIT: 'object_exit',
+  OBJECT_OPEN: 'object_open',
+  OBJECT_SELECT: 'object_select',
+  PARAGRAPH_BREAK: 'paragraph_break',
+  SECTION: 'section',
+  SELECTION: 'selection',
+  SELECTION_REVERSE: 'selection_reverse',
+  SPECIAL_CONTENT: 'special_content',
+  TASK_SUCCESS: 'task_success',
+  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 {number} earcon An earcon index.
+ * @param {cvox.Earcon} earcon An earcon identifier.
  */
 cvox.AbstractEarcons.prototype.playEarcon = function(earcon) {
 };
 
 
 /**
- * Plays the specified earcon sound, given the name of the earcon.
- * @param {string} earconName The name of the earcon.
- */
-cvox.AbstractEarcons.prototype.playEarconByName = function(earconName) {
-  this.playEarcon(this.getEarconId(earconName));
-};
-
-
-/**
  * Whether or not earcons are available.
  * @return {boolean} True if earcons are available.
  */
 cvox.AbstractEarcons.prototype.earconsAvailable = function() {
   return true;
 };
 
 
 /**
- * @param {number} earcon An earcon index.
- * @return {string} The readable earcon name.
- */
-cvox.AbstractEarcons.prototype.getEarconName = function(earcon) {
-  if (!this.earconNames) {
-    this.earconNames = new Array();
-    this.earconNames.push('ALERT_MODAL');
-    this.earconNames.push('ALERT_NONMODAL');
-    this.earconNames.push('BULLET');
-    this.earconNames.push('BUSY_PROGRESS_LOOP');
-    this.earconNames.push('BUTTON');
-    this.earconNames.push('CHECK_OFF');
-    this.earconNames.push('CHECK_ON');
-    this.earconNames.push('EDITABLE_TEXT');
-    this.earconNames.push('FONT_CHANGE');
-    this.earconNames.push('INVALID_KEYPRESS');
-    this.earconNames.push('LINK');
-    this.earconNames.push('LISTBOX');
-    this.earconNames.push('LIST_ITEM');
-    this.earconNames.push('LONG_DESC');
-    this.earconNames.push('OBJECT_CLOSE');
-    this.earconNames.push('OBJECT_ENTER');
-    this.earconNames.push('OBJECT_EXIT');
-    this.earconNames.push('OBJECT_OPEN');
-    this.earconNames.push('OBJECT_SELECT');
-    this.earconNames.push('PARAGRAPH_BREAK');
-    this.earconNames.push('SELECTION');
-    this.earconNames.push('SELECTION_REVERSE');
-    this.earconNames.push('SPECIAL_CONTENT');
-    this.earconNames.push('TASK_SUCCESS');
-    this.earconNames.push('WRAP');
-    this.earconNames.push('WRAP_EDGE');
-  }
-  return this.earconNames[earcon];
-};
-
-
-/**
- * @param {string} earconName An earcon name.
- * @return {number} The earcon ID.
- */
-cvox.AbstractEarcons.prototype.getEarconId = function(earconName) {
-  if (!this.earconNamesToIds) {
-    this.earconNamesToIds = new Object();
-    this.earconNamesToIds['ALERT_MODAL'] =
-        cvox.AbstractEarcons.ALERT_MODAL;
-    this.earconNamesToIds['ALERT_NONMODAL'] =
-        cvox.AbstractEarcons.ALERT_NONMODAL;
-    this.earconNamesToIds['BULLET'] = cvox.AbstractEarcons.BULLET;
-    this.earconNamesToIds['BUSY_PROGRESS_LOOP'] =
-        cvox.AbstractEarcons.BUSY_PROGRESS_LOOP;
-    this.earconNamesToIds['BUTTON'] = cvox.AbstractEarcons.BUTTON;
-    this.earconNamesToIds['CHECK_OFF'] = cvox.AbstractEarcons.CHECK_OFF;
-    this.earconNamesToIds['CHECK_ON'] = cvox.AbstractEarcons.CHECK_ON;
-    this.earconNamesToIds['EDITABLE_TEXT'] = cvox.AbstractEarcons.EDITABLE_TEXT;
-    this.earconNamesToIds['FONT_CHANGE'] = cvox.AbstractEarcons.FONT_CHANGE;
-    this.earconNamesToIds['INVALID_KEYPRESS'] =
-        cvox.AbstractEarcons.INVALID_KEYPRESS;
-    this.earconNamesToIds['LINK'] = cvox.AbstractEarcons.LINK;
-    this.earconNamesToIds['LISTBOX'] = cvox.AbstractEarcons.LISTBOX;
-    this.earconNamesToIds['LIST_ITEM'] = cvox.AbstractEarcons.LIST_ITEM;
-    this.earconNamesToIds['LONG_DESC'] = cvox.AbstractEarcons.LONG_DESC;
-    this.earconNamesToIds['OBJECT_CLOSE'] = cvox.AbstractEarcons.OBJECT_CLOSE;
-    this.earconNamesToIds['OBJECT_ENTER'] = cvox.AbstractEarcons.OBJECT_ENTER;
-    this.earconNamesToIds['OBJECT_EXIT'] = cvox.AbstractEarcons.OBJECT_EXIT;
-    this.earconNamesToIds['OBJECT_OPEN'] = cvox.AbstractEarcons.OBJECT_OPEN;
-    this.earconNamesToIds['OBJECT_SELECT'] = cvox.AbstractEarcons.OBJECT_SELECT;
-    this.earconNamesToIds['PARAGRAPH_BREAK'] =
-        cvox.AbstractEarcons.PARAGRAPH_BREAK;
-    this.earconNamesToIds['SELECTION'] = cvox.AbstractEarcons.SELECTION;
-    this.earconNamesToIds['SELECTION_REVERSE'] =
-        cvox.AbstractEarcons.SELECTION_REVERSE;
-    this.earconNamesToIds['SPECIAL_CONTENT'] =
-        cvox.AbstractEarcons.SPECIAL_CONTENT;
-    this.earconNamesToIds['TASK_SUCCESS'] = cvox.AbstractEarcons.TASK_SUCCESS;
-    this.earconNamesToIds['WRAP'] = cvox.AbstractEarcons.WRAP;
-    this.earconNamesToIds['WRAP_EDGE'] = cvox.AbstractEarcons.WRAP_EDGE;
-  }
-  return this.earconNamesToIds[earconName];
-};
-
-
-/**
- * @param {number} earconId The earcon ID.
- * @return {string} The filename for the earcon.
- */
-cvox.AbstractEarcons.prototype.getEarconFilename = function(earconId) {
-  return cvox.AbstractEarcons.earconMap[earconId];
-};
-
-
-/**
  * 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;
 };
-
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.ALERT_MODAL = 0;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.ALERT_NONMODAL = 1;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.BULLET = 2;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.BUSY_PROGRESS_LOOP = 3;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.BUTTON = 4;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.CHECK_OFF = 5;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.CHECK_ON = 6;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.EDITABLE_TEXT = 7;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.FONT_CHANGE = 8;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.INVALID_KEYPRESS = 9;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.LINK = 10;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.LISTBOX = 11;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.LIST_ITEM = 12;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.LONG_DESC = 13;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.OBJECT_CLOSE = 14;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.OBJECT_ENTER = 15;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.OBJECT_EXIT = 16;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.OBJECT_OPEN = 17;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.OBJECT_SELECT = 18;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.PARAGRAPH_BREAK = 19;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.SELECTION = 20;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.SELECTION_REVERSE = 21;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.SPECIAL_CONTENT = 22;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.TASK_SUCCESS = 23;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.WRAP = 24;
-
-/**
- * @type {number}
- */
-cvox.AbstractEarcons.WRAP_EDGE = 25;
-
-/**
- * The earcon map.
- * @type {Object}
- */
-cvox.AbstractEarcons.earconMap = new Object();
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.ALERT_NONMODAL] =
-    'alert_nonmodal.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.BULLET] = 'bullet.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.BUSY_PROGRESS_LOOP] =
-    'busy_progress_loop.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.BUTTON] = 'button.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.CHECK_OFF] =
-    'check_off.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.CHECK_ON] = 'check_on.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.EDITABLE_TEXT] =
-    'editable_text.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.FONT_CHANGE] =
-    'font_change.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.LINK] = 'link.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.LISTBOX] = 'listbox.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.LIST_ITEM] = 'bullet.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.LONG_DESC] =
-    'long_desc.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.OBJECT_CLOSE] =
-    'object_close.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.OBJECT_ENTER] =
-    'object_enter.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.OBJECT_EXIT] =
-    'object_exit.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.OBJECT_OPEN] =
-    'object_open.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.OBJECT_SELECT] =
-    'object_select.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.PARAGRAPH_BREAK] =
-    'paragraph_break.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.SELECTION] =
-    'selection.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.SELECTION_REVERSE] =
-    'selection_reverse.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.SPECIAL_CONTENT] =
-    'special_content.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.TASK_SUCCESS] =
-    'task_success.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.WRAP] = 'wrap.ogg';
-cvox.AbstractEarcons.earconMap[cvox.AbstractEarcons.WRAP_EDGE] =
-    'wrap_edge.ogg';