Check whether aria-expanded attribute is defined

Source/core/accessibility/AXObject.h

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * 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.
@@ skipping 176 matching lines @@
     HelpText,
     VisibleText,
     TitleTagText,
     PlaceholderText,
     LabelByElementText,
 };
 
 enum AccessibilityState {
     AXBusyState,
     AXCheckedState,
-    AXCollapsedState,
     AXEnabledState,
     AXExpandedState,
     AXFocusableState,
     AXFocusedState,
     AXHaspopupState,
     AXHoveredState,
     AXIndeterminateState,
     AXInvisibleState,
     AXLinkedState,
     AXMultiselectableState,
@@ skipping 42 matching lines @@
     ButtonStateMixed,
 };
 
 enum AccessibilityTextDirection {
     AccessibilityTextDirectionLeftToRight,
     AccessibilityTextDirectionRightToLeft,
     AccessibilityTextDirectionTopToBottom,
     AccessibilityTextDirectionBottomToTop
 };
 
+enum AccessibilityExpanded {
+    ExpandedUndefined = 0,
+    ExpandedCollapsed,
+    ExpandedExpanded,
+};
+
 class AXObject : public RefCounted<AXObject> {
 public:
     typedef Vector<RefPtr<AXObject> > AccessibilityChildrenVector;
 
     struct PlainTextRange {
 
         unsigned start;
         unsigned length;
 
         PlainTextRange()
@@ skipping 88 matching lines @@
     bool isTextControl() const;
     bool isTree() const { return roleValue() == TreeRole; }
     bool isTreeItem() const { return roleValue() == TreeItemRole; }
     bool isWebArea() const { return roleValue() == WebAreaRole; }
 
     // Check object state.
     virtual bool isChecked() const { return false; }
     virtual bool isClickable() const;
     virtual bool isCollapsed() const { return false; }
     virtual bool isEnabled() const { return false; }
-    virtual bool isExpanded() const { return false; }
+    virtual AccessibilityExpanded isExpanded() const { return ExpandedUndefined; }
     virtual bool isFocused() const { return false; }
     virtual bool isHovered() const { return false; }
     virtual bool isIndeterminate() const { return false; }
     virtual bool isLinked() const { return false; }
     virtual bool isLoaded() const { return false; }
     virtual bool isMultiSelectable() const { return false; }
     virtual bool isOffScreen() const { return false; }
     virtual bool isPressed() const { return false; }
     virtual bool isReadOnly() const { return false; }
     virtual bool isRequired() const { return false; }
@@ skipping 218 matching lines @@
     // functions called here may only search up the tree (ancestors), not down.
     void updateCachedAttributeValuesIfNeeded() const;
 };
 
 #define DEFINE_AX_OBJECT_TYPE_CASTS(thisType, predicate) \
     DEFINE_TYPE_CASTS(thisType, AXObject, object, object->predicate, object.predicate)
 
 } // namespace blink
 
 #endif // AXObject_h