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      1 /*
      2  * Copyright (C) 2011 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef AccessibilityScrollView_h
     27 #define AccessibilityScrollView_h
     28 
     29 #include "AccessibilityObject.h"
     30 
     31 namespace WebCore {
     32 
     33 class AccessibilityScrollbar;
     34 class Scrollbar;
     35 class ScrollView;
     36 
     37 class AccessibilityScrollView : public AccessibilityObject {
     38 public:
     39     static PassRefPtr<AccessibilityScrollView> create(ScrollView*);
     40     virtual AccessibilityRole roleValue() const { return ScrollAreaRole; }
     41     ScrollView* scrollView() const { return m_scrollView.get(); }
     42 
     43 private:
     44     AccessibilityScrollView(ScrollView*);
     45 
     46     virtual bool accessibilityIsIgnored() const { return false; }
     47     virtual bool isAccessibilityScrollView() const { return true; }
     48 
     49     virtual bool isAttachment() const;
     50     virtual Widget* widgetForAttachmentView() const;
     51 
     52     virtual AccessibilityObject* scrollBar(AccessibilityOrientation) const;
     53     virtual void addChildren();
     54     virtual AccessibilityObject* accessibilityHitTest(const IntPoint&) const;
     55     virtual const AccessibilityChildrenVector& children();
     56     virtual void updateChildrenIfNecessary();
     57 
     58     virtual FrameView* documentFrameView() const;
     59     virtual IntRect elementRect() const;
     60     virtual AccessibilityObject* parentObject() const;
     61 
     62     AccessibilityObject* webAreaObject() const;
     63     virtual AccessibilityObject* firstChild() const { return webAreaObject(); }
     64     AccessibilityScrollbar* addChildScrollbar(Scrollbar*);
     65     void removeChildScrollbar(AccessibilityObject*);
     66 
     67     RefPtr<ScrollView> m_scrollView;
     68     RefPtr<AccessibilityObject> m_horizontalScrollbar;
     69     RefPtr<AccessibilityObject> m_verticalScrollbar;
     70 };
     71 
     72 inline AccessibilityScrollView* toAccessibilityScrollView(AccessibilityObject* object)
     73 {
     74     ASSERT(!object || object->isAccessibilityScrollView());
     75     if (!object->isAccessibilityScrollView())
     76         return 0;
     77 
     78     return static_cast<AccessibilityScrollView*>(object);
     79 }
     80 
     81 } // namespace WebCore
     82 
     83 #endif // AccessibilityScrollView_h
     84 
     85