Reland: Made content editables report the caret and text selection by treating them as text controls

Source/modules/accessibility/AXObject.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 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 299 matching lines @@
 
 bool AXObject::isPasswordFieldAndShouldHideValue() const
 {
     Settings* settings = document()->settings();
     if (!settings || settings->accessibilityPasswordValuesEnabled())
         return false;
 
     return isPasswordField();
 }
 
+// If you call node->hasEditableStyle() since that will return true if an ancestor is editable.
+// This only returns true if this is the element that actually has the contentEditable attribute set.
+bool AXObject::hasContentEditableAttributeSet() const
+{
+    if (!hasAttribute(contenteditableAttr))
+        return false;
+    const AtomicString& contentEditableValue = getAttribute(contenteditableAttr);
+    // Both "true" (case-insensitive) and the empty string count as true.
+    return contentEditableValue.isEmpty() || equalIgnoringCase(contentEditableValue, "true");
+}
+
 bool AXObject::isTextControl() const
 {
+    if (hasContentEditableAttributeSet())
+        return true;
+
     switch (roleValue()) {
     case TextAreaRole:
     case TextFieldRole:
     case ComboBoxRole:
     case SearchBoxRole:
         return true;
     default:
         return false;
     }
 }
@@ skipping 811 matching lines @@
 }
 
 const AtomicString& AXObject::roleName(AccessibilityRole role)
 {
     static const Vector<AtomicString>* roleNameVector = createRoleNameVector();
 
     return roleNameVector->at(role);
 }
 
 } // namespace blink