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
31namespace WebCore {
32
33class AccessibilityScrollbar;
34class Scrollbar;
35class ScrollView;
36
37class AccessibilityScrollView : public AccessibilityObject {
38public:
39    static PassRefPtr<AccessibilityScrollView> create(ScrollView*);
40    virtual AccessibilityRole roleValue() const override { return ScrollAreaRole; }
41    ScrollView* scrollView() const { return m_scrollView; }
42
43    virtual ~AccessibilityScrollView();
44    virtual void detach(AccessibilityDetachmentType, AXObjectCache*) override;
45
46protected:
47    virtual ScrollableArea* getScrollableAreaIfScrollable() const override;
48    virtual void scrollTo(const IntPoint&) const override;
49
50private:
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    virtual void setFocused(bool) override;
68    virtual bool canSetFocusAttribute() const override;
69    virtual bool isFocused() const override;
70
71    virtual FrameView* documentFrameView() const override;
72    virtual LayoutRect elementRect() const override;
73    virtual AccessibilityObject* parentObject() const override;
74    virtual AccessibilityObject* parentObjectIfExists() const override;
75
76    AccessibilityObject* webAreaObject() const;
77    virtual AccessibilityObject* firstChild() const override { return webAreaObject(); }
78    AccessibilityScrollbar* addChildScrollbar(Scrollbar*);
79    void removeChildScrollbar(AccessibilityObject*);
80
81    ScrollView* m_scrollView;
82    RefPtr<AccessibilityObject> m_horizontalScrollbar;
83    RefPtr<AccessibilityObject> m_verticalScrollbar;
84    bool m_childrenDirty;
85};
86
87ACCESSIBILITY_OBJECT_TYPE_CASTS(AccessibilityScrollView, isAccessibilityScrollView())
88
89} // namespace WebCore
90
91#endif // AccessibilityScrollView_h
92