diff -r 000000000000 -r 4f2f89ce4247 WebCore/accessibility/AXObjectCache.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/accessibility/AXObjectCache.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 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
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef AXObjectCache_h
+#define AXObjectCache_h
+
+#include "AccessibilityObject.h"
+#include "Timer.h"
+#include <limits.h>
+#include <wtf/HashMap.h>
+#include <wtf/HashSet.h>
+#include <wtf/RefPtr.h>
+
+#ifdef __OBJC__
+@class WebCoreTextMarker;
+#else
+class WebCoreTextMarker;
+#endif
+
+namespace WebCore {
+
+class HTMLAreaElement;
+class Node;
+class Page;
+class RenderObject;
+class String;
+class VisiblePosition;
+
+struct TextMarkerData {
+    AXID axID;
+    Node* node;
+    int offset;
+    EAffinity affinity;
+};
+
+enum PostType { PostSynchronously, PostAsynchronously };
+
+class AXObjectCache : public Noncopyable {
+public:
+    AXObjectCache();
+    ~AXObjectCache();
+
+    static AccessibilityObject* focusedUIElementForPage(const Page*);
+
+    // to be used with render objects
+    AccessibilityObject* getOrCreate(RenderObject*);
+    
+    // used for objects without backing elements
+    AccessibilityObject* getOrCreate(AccessibilityRole);
+    
+    // will only return the AccessibilityObject if it already exists
+    AccessibilityObject* get(RenderObject*);
+    
+    void remove(RenderObject*);
+    void remove(AXID);
+
+    void detachWrapper(AccessibilityObject*);
+    void attachWrapper(AccessibilityObject*);
+    void childrenChanged(RenderObject*);
+    void selectedChildrenChanged(RenderObject*);
+    // Called by a node when text or a text equivalent (e.g. alt) attribute is changed.
+    void contentChanged(RenderObject*);
+    
+    void handleActiveDescendantChanged(RenderObject*);
+    void handleAriaRoleChanged(RenderObject*);
+    void handleFocusedUIElementChanged(RenderObject* oldFocusedRenderer, RenderObject* newFocusedRenderer);
+    void handleScrolledToAnchor(const Node* anchorNode);
+    void handleAriaExpandedChange(RenderObject*);
+    
+    static void enableAccessibility() { gAccessibilityEnabled = true; }
+    static void enableEnhancedUserInterfaceAccessibility() { gAccessibilityEnhancedUserInterfaceEnabled = true; }
+    
+    static bool accessibilityEnabled() { return gAccessibilityEnabled; }
+    static bool accessibilityEnhancedUserInterfaceEnabled() { return gAccessibilityEnhancedUserInterfaceEnabled; }
+
+    void removeAXID(AccessibilityObject*);
+    bool isIDinUse(AXID id) const { return m_idsInUse.contains(id); }
+    AXID platformGenerateAXID() const;
+    AccessibilityObject* objectFromAXID(AXID id) const { return m_objects.get(id).get(); }
+
+    // Text marker utilities.
+    static void textMarkerDataForVisiblePosition(TextMarkerData&, const VisiblePosition&);
+    static VisiblePosition visiblePositionForTextMarkerData(TextMarkerData&);
+
+    enum AXNotification {
+        AXActiveDescendantChanged,
+        AXCheckedStateChanged,
+        AXFocusedUIElementChanged,
+        AXLayoutComplete,
+        AXLoadComplete,
+        AXSelectedChildrenChanged,
+        AXSelectedTextChanged,
+        AXValueChanged,
+        AXScrolledToAnchor,
+        AXLiveRegionChanged,
+        AXMenuListValueChanged,
+        AXRowCountChanged,
+        AXRowCollapsed,
+        AXRowExpanded,
+    };
+
+    void postNotification(RenderObject*, AXNotification, bool postToElement, PostType = PostAsynchronously);
+    void postNotification(AccessibilityObject*, Document*, AXNotification, bool postToElement, PostType = PostAsynchronously);
+
+    bool nodeHasRole(Node*, const AtomicString& role);
+
+protected:
+    void postPlatformNotification(AccessibilityObject*, AXNotification);
+
+private:
+    HashMap<AXID, RefPtr<AccessibilityObject> > m_objects;
+    HashMap<RenderObject*, AXID> m_renderObjectMapping;
+    static bool gAccessibilityEnabled;
+    static bool gAccessibilityEnhancedUserInterfaceEnabled;
+    
+    HashSet<AXID> m_idsInUse;
+    
+    Timer<AXObjectCache> m_notificationPostTimer;
+    Vector<pair<RefPtr<AccessibilityObject>, AXNotification> > m_notificationsToPost;
+    void notificationPostTimerFired(Timer<AXObjectCache>*);
+    
+    static AccessibilityObject* focusedImageMapUIElement(HTMLAreaElement*);
+    
+    AXID getAXID(AccessibilityObject*);
+};
+
+#if !HAVE(ACCESSIBILITY)
+inline void AXObjectCache::handleActiveDescendantChanged(RenderObject*) { }
+inline void AXObjectCache::handleAriaRoleChanged(RenderObject*) { }
+inline void AXObjectCache::detachWrapper(AccessibilityObject*) { }
+inline void AXObjectCache::attachWrapper(AccessibilityObject*) { }
+inline void AXObjectCache::selectedChildrenChanged(RenderObject*) { }
+inline void AXObjectCache::postNotification(RenderObject*, AXNotification, bool postToElement, PostType) { }
+inline void AXObjectCache::postNotification(AccessibilityObject*, Document*, AXNotification, bool postToElement, PostType) { }
+inline void AXObjectCache::postPlatformNotification(AccessibilityObject*, AXNotification) { }
+inline void AXObjectCache::handleFocusedUIElementChanged(RenderObject*, RenderObject*) { }
+inline void AXObjectCache::handleScrolledToAnchor(const Node*) { }
+inline void AXObjectCache::contentChanged(RenderObject*) { }
+inline void AXObjectCache::handleAriaExpandedChange(RenderObject*) { }
+#endif
+
+}
+
+#endif