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 "core/accessibility/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; } 42 43 virtual ~AccessibilityScrollView(); 44 virtual void detach() OVERRIDE; 45 46 protected: 47 virtual ScrollableArea* getScrollableAreaIfScrollable() const OVERRIDE; 48 virtual void scrollTo(const IntPoint&) const OVERRIDE; 49 50 private: 51 explicit AccessibilityScrollView(ScrollView*); 52 53 virtual bool computeAccessibilityIsIgnored() const OVERRIDE; 54 virtual bool isAccessibilityScrollView() const OVERRIDE { return true; } 55 virtual bool isEnabled() const OVERRIDE { return true; } 56 57 virtual bool isAttachment() const OVERRIDE; 58 virtual Widget* widgetForAttachmentView() const OVERRIDE; 59 60 virtual AccessibilityObject* scrollBar(AccessibilityOrientation) OVERRIDE; 61 virtual void addChildren() OVERRIDE; 62 virtual void clearChildren() OVERRIDE; 63 virtual AccessibilityObject* accessibilityHitTest(const IntPoint&) const OVERRIDE; 64 virtual void updateChildrenIfNecessary() OVERRIDE; 65 virtual void setNeedsToUpdateChildren() OVERRIDE { m_childrenDirty = true; } 66 void updateScrollbars(); 67 68 virtual FrameView* documentFrameView() const OVERRIDE; 69 virtual LayoutRect elementRect() const OVERRIDE; 70 virtual AccessibilityObject* parentObject() const OVERRIDE; 71 virtual AccessibilityObject* parentObjectIfExists() const OVERRIDE; 72 73 AccessibilityObject* webAreaObject() const; 74 virtual AccessibilityObject* firstChild() const OVERRIDE { return webAreaObject(); } 75 AccessibilityScrollbar* addChildScrollbar(Scrollbar*); 76 void removeChildScrollbar(AccessibilityObject*); 77 78 ScrollView* m_scrollView; 79 RefPtr<AccessibilityObject> m_horizontalScrollbar; 80 RefPtr<AccessibilityObject> m_verticalScrollbar; 81 bool m_childrenDirty; 82 }; 83 84 inline AccessibilityScrollView* toAccessibilityScrollView(AccessibilityObject* object) 85 { 86 ASSERT(!object || object->isAccessibilityScrollView()); 87 if (!object->isAccessibilityScrollView()) 88 return 0; 89 90 return static_cast<AccessibilityScrollView*>(object); 91 } 92 93 } // namespace WebCore 94 95 #endif // AccessibilityScrollView_h 96
