Implement computedRole and computedName (behind a flag)

Source/modules/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 22 matching lines @@
 #include "core/editing/VisiblePosition.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/LayoutRect.h"
 #include "wtf/Forward.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class AXObject;
+class AXObjectCache;
 class AXObjectCacheImpl;
 class Element;
 class FrameView;
 class IntPoint;
 class Node;
 class RenderObject;
 class ScrollableArea;
 class Widget;
 
 typedef unsigned AXID;
 
 enum AccessibilityRole {
-    AlertDialogRole = 1,
+    UnknownRole = 0,
+    AlertDialogRole,
     AlertRole,
     AnnotationRole,
     ApplicationRole,
     ArticleRole,
     BannerRole,
     BlockquoteRole,
     BusyIndicatorRole,
     ButtonRole,
     CanvasRole,
     CellRole,
@@ skipping 90 matching lines @@
     TableRole,
     TextAreaRole,
     TextFieldRole,
     TimeRole,
     TimerRole,
     ToggleButtonRole,
     ToolbarRole,
     TreeGridRole,
     TreeItemRole,
     TreeRole,
-    UnknownRole,
     UserInterfaceTooltipRole,
     WebAreaRole,
     WindowRole,
+    NumRoles
 };
 
 enum AccessibilityTextSource {
     AlternativeText,
     ChildrenText,
     SummaryText,
     HelpText,
     VisibleText,
     TitleTagText,
     PlaceholderText,
@@ skipping 291 matching lines @@
     virtual bool liveRegionAtomic() const { return false; }
     virtual bool liveRegionBusy() const { return false; }
 
     const AtomicString& containerLiveRegionStatus() const;
     const AtomicString& containerLiveRegionRelevant() const;
     bool containerLiveRegionAtomic() const;
     bool containerLiveRegionBusy() const;
 
     // Accessibility Text.
     virtual String textUnderElement() const { return String(); }
-
-    // Accessibility Text - (To be deprecated).
     virtual String accessibilityDescription() const { return String(); }
     virtual String title() const { return String(); }
     virtual String helpText() const { return String(); }
+    // Returns result of Accessible Name Calculation algorithm
+    // TODO(aboxhall): ensure above and replace title() with this logic
+    virtual String computedName() const { return String(); }
 
     // Location and click point in frame-relative coordinates.
     virtual LayoutRect elementRect() const { return m_explicitElementRect; }
     void setElementRect(LayoutRect r) { m_explicitElementRect = r; }
     virtual void markCachedElementRectDirty() const;
     virtual IntPoint clickPoint();
 
     // Hit testing.
     // Called on the root AX object to return the deepest available element.
     virtual AXObject* accessibilityHitTest(const IntPoint&) const { return 0; }
@@ skipping 74 matching lines @@
     virtual VisiblePosition visiblePositionForIndex(int) const { return VisiblePosition(); }
     int lineForPosition(const VisiblePosition&) const;
     virtual int index(const VisiblePosition&) const { return -1; }
     virtual void lineBreaks(Vector<int>&) const { }
 
     // Static helper functions.
     static bool isARIAControl(AccessibilityRole);
     static bool isARIAInput(AccessibilityRole);
     static AccessibilityRole ariaRoleToWebCoreRole(const String&);
     static IntRect boundingBoxForQuads(RenderObject*, const Vector<FloatQuad>&);
+    static const AtomicString& roleName(AccessibilityRole);
 
 protected:
     AXID m_id;
     AccessibilityChildrenVector m_children;
     mutable bool m_haveChildren;
     AccessibilityRole m_role;
     AXObjectInclusion m_lastKnownIsIgnoredValue;
     LayoutRect m_explicitElementRect;
 
     virtual bool computeAccessibilityIsIgnored() const { return true; }
@@ skipping 23 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