Use an enum for ChromeVox queue mode.

chrome/browser/resources/chromeos/chromevox/common/time_widget.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.
 
 goog.provide('cvox.ChromeVoxHTMLTimeWidget');
 
 /**
  * @fileoverview Gives the user spoken feedback as they interact with the time
  * widget (input type=time).
  *
  */
 
 /**
  * A class containing the information needed to speak
  * a text change event to the user.
  *
  * @constructor
  * @param {Element} timeElem The time widget element.
  * @param {cvox.TtsInterface} tts The TTS object from ChromeVox.
  */
-cvox.ChromeVoxHTMLTimeWidget = function(timeElem, tts){
+cvox.ChromeVoxHTMLTimeWidget = function(timeElem, tts) {
   var self = this;
   this.timeElem_ = timeElem;
   this.timeTts_ = tts;
   this.pHours_ = -1;
   this.pMinutes_ = -1;
   this.pSeconds_ = 0;
   this.pMilliseconds_ = 0;
   this.pAmpm_ = '';
   this.pos_ = 0;
   this.maxPos_ = 2;
   this.keyListener_ = function(evt) {
     self.eventHandler_(evt);
-  }
+  };
   this.blurListener_ = function(evt) {
     self.shutdown();
-  }
+  };
   if (this.timeElem_.hasAttribute('step')) {
-  var step = this.timeElem_.getAttribute('step');
+    var step = this.timeElem_.getAttribute('step');
     if (step > 0) { // 0 or invalid values show hh:mm AM/PM
       if (step >= 1) {
         this.maxPos_ = 3; // Anything larger than 1 shows hh:mm:ss AM/PM
       } else {
         this.maxPos_ = 4; // Anything less than 1 shows hh:mm:ss.ms AM/PM
       }
     }
   }
 
   // Ensure we have a reasonable value to start with.
@@ skipping 23 matching lines @@
 /**
  * Removes the key listeners for the time widget.
  *
  */
 cvox.ChromeVoxHTMLTimeWidget.prototype.shutdown = function() {
   this.timeElem_.removeEventListener('blur', this.blurListener_, false);
   this.timeElem_.removeEventListener('keydown', this.keyListener_, false);
   this.timeElem_.removeEventListener('keyup', this.keyListener_, false);
 };
 
+/**
+ * Initialize to midnight.
+ * @private
+ */
 cvox.ChromeVoxHTMLTimeWidget.prototype.forceInitTime_ = function() {
   this.timeElem_.setAttribute('value', '12:00');
 };
 
+/**
+ * Called when the position changes.
+ * @private
+ */
 cvox.ChromeVoxHTMLTimeWidget.prototype.handlePosChange_ = function() {
-  if (this.pos_ < 0){
+  if (this.pos_ < 0) {
     this.pos_ = 0;
   }
-  if (this.pos_ > this.maxPos_){
+  if (this.pos_ > this.maxPos_) {
     this.pos_ = this.maxPos_;
   }
   // Reset the cached state of the new field so that the field will be spoken
   // in the update.
-  if (this.pos_ == this.maxPos_){
+  if (this.pos_ == this.maxPos_) {
     this.pAmpm_ = '';
     return;
   }
-  switch (this.pos_){
+  switch (this.pos_) {
     case 0:
       this.pHours_ = -1;
       break;
     case 1:
       this.pMinutes_ = -1;
       break;
     case 2:
       this.pSeconds_ = -1;
       break;
     case 3:
       this.pMilliseconds_ = -1;
       break;
   }
 };
 
-
+/**
+ * @param {boolean} shouldSpeakLabel True if the label should be spoken.
+ * @private
+ */
 cvox.ChromeVoxHTMLTimeWidget.prototype.update_ = function(shouldSpeakLabel) {
-  var splitTime = this.timeElem_.value.split(":");
-  if (splitTime.length < 1){
+  var splitTime = this.timeElem_.value.split(':');
+  if (splitTime.length < 1) {
     this.forceInitTime_();
     return;
   }
 
   var hours = splitTime[0];
   var minutes = -1;
   var seconds = 0;
   var milliseconds = 0;
   var ampm = cvox.ChromeVox.msgs.getMsg('timewidget_am');
   if (splitTime.length > 1) {
     minutes = splitTime[1];
   }
   if (splitTime.length > 2) {
     var splitSecondsAndMilliseconds = splitTime[2].split('.');
     seconds = splitSecondsAndMilliseconds[0];
-    if (splitSecondsAndMilliseconds.length > 1){
+    if (splitSecondsAndMilliseconds.length > 1) {
       milliseconds = splitSecondsAndMilliseconds[1];
     }
   }
   if (hours > 12) {
     hours = hours - 12;
     ampm = cvox.ChromeVox.msgs.getMsg('timewidget_pm');
   }
   if (hours == 12) {
     ampm = cvox.ChromeVox.msgs.getMsg('timewidget_pm');
   }
@@ skipping 31 matching lines @@
         cvox.ChromeVox.msgs.getMsg('timewidget_milliseconds') + '\n';
     this.pMilliseconds_ = milliseconds;
   }
 
   if (ampm != this.pAmpm_) {
     changeMessage = changeMessage + ampm;
     this.pAmpm_ = ampm;
   }
 
   if (changeMessage.length > 0) {
-    this.timeTts_.speak(changeMessage, 0, null);
+    this.timeTts_.speak(changeMessage, cvox.QueueMode.FLUSH, null);
   }
 };
 
+/**
+ * @param {Object} evt The event to handle.
+ * @private
+ */
 cvox.ChromeVoxHTMLTimeWidget.prototype.eventHandler_ = function(evt) {
   var shouldSpeakLabel = false;
   if (evt.type == 'keydown') {
     if (((evt.keyCode == 9) && !evt.shiftKey) || (evt.keyCode == 39)) {
       this.pos_++;
       this.handlePosChange_();
       shouldSpeakLabel = true;
     }
     if (((evt.keyCode == 9) && evt.shiftKey) || (evt.keyCode == 37)) {
       this.pos_--;
       this.handlePosChange_();
       shouldSpeakLabel = true;
     }
   }
   this.update_(shouldSpeakLabel);
 };