Enable accessible name of a control to include multiple <label> elements.

third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp

 /*
 * Copyright (C) 2008 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 33 matching lines @@
 #include "core/frame/FrameOwner.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLLabelElement.h"
 #include "core/html/HTMLOptionElement.h"
 #include "core/html/HTMLSelectElement.h"
 #include "core/html/HTMLTextAreaElement.h"
+#include "core/html/LabelsNodeList.h"
 #include "core/html/shadow/ShadowElementNames.h"
 #include "core/layout/HitTestResult.h"
 #include "core/layout/LayoutFieldset.h"
 #include "core/layout/LayoutFileUploadControl.h"
 #include "core/layout/LayoutHTMLCanvas.h"
 #include "core/layout/LayoutImage.h"
 #include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutListMarker.h"
 #include "core/layout/LayoutMenuList.h"
 #include "core/layout/LayoutPart.h"
@@ skipping 2394 matching lines @@
     if (document && document->frame() && document->frame()->pagePopupOwner()) {
         IntPoint popupOrigin = document->view()->contentsToScreen(IntRect()).location();
         IntPoint mainOrigin = axObjectCache().rootObject()->documentFrameView()->contentsToScreen(IntRect()).location();
         result.moveBy(IntPoint(popupOrigin - mainOrigin));
     }
 
     // The size of the web area should be the content size, not the clipped size.
     if (isWebArea() && obj->frame()->view())
         result.setSize(LayoutSize(obj->frame()->view()->contentsSize()));
 
-    // Checkboxes and radio buttons include their label as part of their rect.
-    if (isCheckboxOrRadio()) {
-        HTMLLabelElement* label = labelForElement(toElement(m_layoutObject->node()));
-        if (label && label->layoutObject()) {
-            LayoutRect labelRect = axObjectCache().getOrCreate(label)->elementRect();
-            result.unite(labelRect);
+    // Checkboxes and radio buttons include their labels as part of their rect.
+    if (isCheckboxOrRadio() && isLabelableElement(obj->node())) {
+        LabelsNodeList* labels = toLabelableElement(obj->node())->labels();
+        if (labels) {
+            for (unsigned labelIndex = 0; labelIndex < labels->length(); ++labelIndex) {
+                AXObject* labelAXObject = axObjectCache().getOrCreate(labels->item(labelIndex));
+                if (labelAXObject) {
+                    LayoutRect labelRect = labelAXObject->elementRect();
+                    result.unite(labelRect);
+                }
+            }
         }
     }
 
     return result;
 }
 
 } // namespace blink