Always enqueue live regions from background tabs

chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions.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 Implements support for live regions in ChromeVox Next.
  */
 
 goog.provide('LiveRegions');
 
 goog.require('ChromeVoxState');
 
 goog.scope(function() {
 var AutomationNode = chrome.automation.AutomationNode;
+var RoleType = chrome.automation.RoleType;
 var TreeChange = chrome.automation.TreeChange;
 
 /**
  * ChromeVox2 live region handler.
  * @param {!ChromeVoxState} chromeVoxState The ChromeVox state object,
  *     keeping track of the current mode and current range.
  * @constructor
  */
 LiveRegions = function(chromeVoxState) {
   /**
@@ skipping 55 matching lines @@
 
     var mode = this.chromeVoxState_.mode;
     var currentRange = this.chromeVoxState_.currentRange;
 
     if (mode === ChromeVoxMode.CLASSIC || !cvox.ChromeVox.isActive)
       return;
 
     if (!currentRange)
       return;
 
+    var webView = AutomationUtil.getTopLevelRoot(node);
+    webView = webView ? webView.parent : null;
     if (!LiveRegions.announceLiveRegionsFromBackgroundTabs_ &&
-        !AutomationUtil.isInSameWebpage(node, currentRange.start.node)) {
+        currentRange.start.node.role != RoleType.desktop &&
+        (!webView || !webView.state.focused)) {
       return;
     }
 
     var type = treeChange.type;
     var relevant = node.containerLiveRelevant;
     if (relevant.indexOf('additions') >= 0 &&
         (type == 'nodeCreated' || type == 'subtreeCreated')) {
       this.outputLiveRegionChange_(node, null);
     }
 
@@ skipping 31 matching lines @@
 
     if (!output.hasSpeech && node.liveAtomic)
       output.format('$joinedDescendants', node);
 
     output.withSpeechCategory(cvox.TtsCategory.LIVE);
 
     var currentTime = new Date();
     if (!output.hasSpeech)
       return;
 
+    // Queue live regions coming from background tabs.
+    var webView = AutomationUtil.getTopLevelRoot(node);
+    webView = webView ? webView.parent : null;
+    var forceQueueForBackgroundedLiveRegion =
+        !webView || !webView.state.focused;
+
     // Enqueue live region updates that were received at approximately
     // the same time, otherwise flush previous live region updates.
     var queueTime = LiveRegions.LIVE_REGION_QUEUE_TIME_MS;
     var delta = currentTime - this.lastLiveRegionTime_;
-    if (delta > queueTime)
+    if (delta > queueTime && !forceQueueForBackgroundedLiveRegion)
       output.withQueueMode(cvox.QueueMode.CATEGORY_FLUSH);
     else
       output.withQueueMode(cvox.QueueMode.QUEUE);
 
     if (delta > LiveRegions.LIVE_REGION_MIN_SAME_NODE_MS)
       this.liveRegionNodeSet_ = new WeakSet();
 
     var parent = node;
     while (parent) {
       if (this.liveRegionNodeSet_.has(parent)) {
         this.lastLiveRegionTime_ = currentTime;
         return;
       }
       parent = parent.parent;
     }
 
     this.liveRegionNodeSet_.add(node);
     output.go();
     this.lastLiveRegionTime_ = currentTime;
   },
 };
 
 });  // goog.scope