Source/modules/accessibility/AXScrollView.h - Issue 1348503003: One AXObjectCache per frame

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Issue 1348503003: One AXObjectCache per frame (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: Send focus notifications when focus is cleared Created 5 years, 3 months ago

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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 AXScrollView_h

27 #define AXScrollView_h

28

29 #include "modules/accessibility/AXObject.h"

30

31 namespace blink {

32

33 class AXObjectCacheImpl;

34 class AXScrollbar;

35 class Scrollbar;

36 class FrameView;

37

38 class AXScrollView final : public AXObject {

39 public:

40 static AXScrollView* create(FrameView*, AXObjectCacheImpl&);

41 AccessibilityRole roleValue() const override { return ScrollAreaRole; }

42 FrameView* scrollView() const { return m_scrollView; }

43

44 ~AXScrollView() override;

45 DECLARE_VIRTUAL_TRACE();

46 void detach() override;

47

48 protected:

49 ScrollableArea* getScrollableAreaIfScrollable() const override;

50

51 private:

52 AXScrollView(FrameView*, AXObjectCacheImpl&);

53

54 bool computeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override ;

55 bool isAXScrollView() const override { return true; }

56 bool isEnabled() const override { return true; }

57

58 bool isAttachment() const override;

59 Widget* widgetForAttachmentView() const override;

60

61 AXObject* scrollBar(AccessibilityOrientation) override;

62 void addChildren() override;

63 void clearChildren() override;

64 AXObject* accessibilityHitTest(const IntPoint&) const override;

65 void updateChildrenIfNecessary() override;

66 void setNeedsToUpdateChildren() override { m_childrenDirty = true; }

67 void updateScrollbars();

68

69 FrameView* documentFrameView() const override;

70 LayoutRect elementRect() const override;

71 AXObject* computeParent() const override;

72 AXObject* computeParentIfExists() const override;

73

74 AXObject* webAreaObject() const;

75 AXObject* firstChild() const override { return webAreaObject(); }

76 AXScrollbar* addChildScrollbar(Scrollbar*);

77 void removeChildScrollbar(AXObject*);

78

79 RawPtrWillBeMember<FrameView> m_scrollView;

80 Member<AXObject> m_horizontalScrollbar;

81 Member<AXObject> m_verticalScrollbar;

82 bool m_childrenDirty;

83 };

84

85 DEFINE_AX_OBJECT_TYPE_CASTS(AXScrollView, isAXScrollView());

86

87 } // namespace blink

88

89 #endif // AXScrollView_h

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