Ignore duplicate HOVER events

chrome/browser/resources/chromeos/chromevox/cvox2/background/desktop_automation_handler.js

 // Copyright 2015 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 Handles automation from a desktop automation node.
  */
 
 goog.provide('DesktopAutomationHandler');
 
@@ skipping 29 matching lines @@
    * @private
    */
   this.lastValueChanged_ = new Date(0);
 
   var e = EventType;
   this.addListener_(e.activedescendantchanged, this.onActiveDescendantChanged);
   this.addListener_(e.alert, this.onAlert);
   this.addListener_(e.ariaAttributeChanged, this.onEventIfInRange);
   this.addListener_(e.checkedStateChanged, this.onEventIfInRange);
   this.addListener_(e.focus, this.onFocus);
-  this.addListener_(e.hover, this.onEventWithFlushedOutput);
+  this.addListener_(e.hover, this.onHover);
   this.addListener_(e.loadComplete, this.onLoadComplete);
   this.addListener_(e.menuEnd, this.onMenuEnd);
   this.addListener_(e.menuListItemSelected, this.onEventIfSelected);
   this.addListener_(e.menuStart, this.onMenuStart);
   this.addListener_(e.scrollPositionChanged, this.onScrollPositionChanged);
   this.addListener_(e.selection, this.onSelection);
   this.addListener_(e.textChanged, this.onTextChanged);
   this.addListener_(e.textSelectionChanged, this.onTextSelectionChanged);
   this.addListener_(e.valueChanged, this.onValueChanged);
 
@@ skipping 92 matching lines @@
 
   /**
    * @param {!AutomationEvent} evt
    */
   onEventWithFlushedOutput: function(evt) {
     Output.flushNextSpeechUtterance();
     this.onEventDefault(evt);
   },
 
   /**
+   * @param {!AutomationEvent} evt
+   */
+  onHover: function(evt) {
+    if (ChromeVoxState.instance.currentRange &&
+        evt.target == ChromeVoxState.instance.currentRange.start.node)
+      return;
+    Output.flushNextSpeechUtterance();
+    this.onEventDefault(evt);
+  },
+
+  /**
    * Makes an announcement without changing focus.
    * @param {!AutomationEvent} evt
    */
   onActiveDescendantChanged: function(evt) {
     if (!evt.target.activeDescendant)
       return;
     this.onEventDefault(new chrome.automation.AutomationEvent(
         EventType.focus, evt.target.activeDescendant));
   },
 
@@ skipping 214 matching lines @@
   if (cvox.ChromeVox.isMac)
     return;
   chrome.automation.getDesktop(function(desktop) {
     global.desktopAutomationHandler = new DesktopAutomationHandler(desktop);
   });
 };
 
 DesktopAutomationHandler.init_();
 
 });  // goog.scope