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1 /* | 1 /* |
2 * Copyright (C) 2008, 2011 Apple Inc. All Rights Reserved. | 2 * Copyright (C) 2008, 2011 Apple Inc. All Rights Reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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42 namespace blink { | 42 namespace blink { |
43 | 43 |
44 class CompositorAnimationHost; | 44 class CompositorAnimationHost; |
45 class CompositorAnimationTimeline; | 45 class CompositorAnimationTimeline; |
46 class GraphicsLayer; | 46 class GraphicsLayer; |
47 class HostWindow; | 47 class HostWindow; |
48 class LayoutBox; | 48 class LayoutBox; |
49 class LayoutObject; | 49 class LayoutObject; |
50 class PaintLayer; | 50 class PaintLayer; |
51 class ProgrammaticScrollAnimator; | 51 class ProgrammaticScrollAnimator; |
| 52 class ProgrammaticScrollCoordinator; |
52 struct ScrollAlignment; | 53 struct ScrollAlignment; |
53 class ScrollAnchor; | 54 class ScrollAnchor; |
54 class ScrollAnimatorBase; | 55 class ScrollAnimatorBase; |
55 class CompositorAnimationTimeline; | 56 class CompositorAnimationTimeline; |
56 | 57 |
57 enum IncludeScrollbarsInRect { | 58 enum IncludeScrollbarsInRect { |
58 ExcludeScrollbars, | 59 ExcludeScrollbars, |
59 IncludeScrollbars, | 60 IncludeScrollbars, |
60 }; | 61 }; |
61 | 62 |
62 class PLATFORM_EXPORT ScrollableArea : public GarbageCollectedMixin { | 63 class PLATFORM_EXPORT ScrollableArea : public GarbageCollectedMixin { |
63 WTF_MAKE_NONCOPYABLE(ScrollableArea); | 64 WTF_MAKE_NONCOPYABLE(ScrollableArea); |
64 | 65 |
65 public: | 66 public: |
66 static int pixelsPerLineStep(HostWindow*); | 67 static int pixelsPerLineStep(HostWindow*); |
67 static float minFractionToStepWhenPaging(); | 68 static float minFractionToStepWhenPaging(); |
68 static int maxOverlapBetweenPages(); | 69 static int maxOverlapBetweenPages(); |
69 | 70 |
70 // Convert a non-finite scroll value (Infinity, -Infinity, NaN) to 0 as | 71 // Convert a non-finite scroll value (Infinity, -Infinity, NaN) to 0 as |
71 // per http://dev.w3.org/csswg/cssom-view/#normalize-non_finite-values. | 72 // per http://dev.w3.org/csswg/cssom-view/#normalize-non_finite-values. |
72 static float normalizeNonFiniteScroll(float value) { | 73 static float normalizeNonFiniteScroll(float value) { |
73 return std::isfinite(value) ? value : 0.0; | 74 return std::isfinite(value) ? value : 0.0; |
74 } | 75 } |
75 | 76 |
76 // The window that hosts the ScrollableArea. The ScrollableArea will | 77 // The window that hosts the ScrollableArea. The ScrollableArea will |
77 // communicate scrolls and repaints to the host window in the window's | 78 // communicate scrolls and repaints to the host window in the window's |
78 // coordinate space. | 79 // coordinate space. |
79 virtual HostWindow* getHostWindow() const { return 0; } | 80 virtual HostWindow* getHostWindow() const { return 0; } |
80 | 81 |
| 82 virtual ProgrammaticScrollCoordinator* getProgrammaticScrollCoordinator() |
| 83 const { |
| 84 return 0; |
| 85 } |
| 86 |
81 virtual ScrollResult userScroll(ScrollGranularity, const ScrollOffset&); | 87 virtual ScrollResult userScroll(ScrollGranularity, const ScrollOffset&); |
82 | 88 |
83 virtual void setScrollOffset(const ScrollOffset&, | 89 virtual void setScrollOffset(const ScrollOffset&, |
84 ScrollType, | 90 ScrollType, |
85 ScrollBehavior = ScrollBehaviorInstant); | 91 ScrollBehavior = ScrollBehaviorInstant); |
86 virtual void scrollBy(const ScrollOffset&, | 92 virtual void scrollBy(const ScrollOffset&, |
87 ScrollType, | 93 ScrollType, |
88 ScrollBehavior = ScrollBehaviorInstant); | 94 ScrollBehavior = ScrollBehaviorInstant); |
89 void setScrollOffsetSingleAxis(ScrollbarOrientation, | 95 void setScrollOffsetSingleAxis(ScrollbarOrientation, |
90 float, | 96 float, |
91 ScrollType, | 97 ScrollType, |
92 ScrollBehavior = ScrollBehaviorInstant); | 98 ScrollBehavior = ScrollBehaviorInstant); |
93 | 99 |
94 // Scrolls the area so that the given rect, given in the document's content | 100 // Scrolls the area so that the given rect, given in the document's content |
95 // coordinates, such that it's visible in the area. Returns the new location | 101 // coordinates, such that it's visible in the area. Returns the new location |
96 // of the input rect relative once again to the document. | 102 // of the input rect relative once again to the document. |
97 // Note, in the case of a Document container, such as FrameView, the output | 103 // Note, in the case of a Document container, such as FrameView, the output |
98 // will always be the input rect since scrolling it can't change the location | 104 // will always be the input rect since scrolling it can't change the location |
99 // of content relative to the document, unlike an overflowing element. | 105 // of content relative to the document, unlike an overflowing element. |
100 virtual LayoutRect scrollIntoView(const LayoutRect& rectInContent, | 106 virtual LayoutRect scrollIntoView(const LayoutRect& rectInContent, |
101 const ScrollAlignment& alignX, | 107 const ScrollAlignment& alignX, |
102 const ScrollAlignment& alignY, | 108 const ScrollAlignment& alignY, |
103 ScrollType = ProgrammaticScroll); | 109 ScrollType = ProgrammaticScroll, |
| 110 ScrollBehavior = ScrollBehaviorAuto); |
104 | 111 |
105 // Returns a rect, in the space of the area's backing graphics layer, that | 112 // Returns a rect, in the space of the area's backing graphics layer, that |
106 // contains the visual region of all scrollbar parts. | 113 // contains the visual region of all scrollbar parts. |
107 virtual LayoutRect visualRectForScrollbarParts() const = 0; | 114 virtual LayoutRect visualRectForScrollbarParts() const = 0; |
108 | 115 |
109 static bool scrollBehaviorFromString(const String&, ScrollBehavior&); | 116 static bool scrollBehaviorFromString(const String&, ScrollBehavior&); |
110 | 117 |
111 void contentAreaWillPaint() const; | 118 void contentAreaWillPaint() const; |
112 void mouseEnteredContentArea() const; | 119 void mouseEnteredContentArea() const; |
113 void mouseExitedContentArea() const; | 120 void mouseExitedContentArea() const; |
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446 // vertical-lr / ltr NO NO | 453 // vertical-lr / ltr NO NO |
447 // vertical-lr / rtl NO YES | 454 // vertical-lr / rtl NO YES |
448 // vertical-rl / ltr YES NO | 455 // vertical-rl / ltr YES NO |
449 // vertical-rl / rtl YES YES | 456 // vertical-rl / rtl YES YES |
450 IntPoint m_scrollOrigin; | 457 IntPoint m_scrollOrigin; |
451 }; | 458 }; |
452 | 459 |
453 } // namespace blink | 460 } // namespace blink |
454 | 461 |
455 #endif // ScrollableArea_h | 462 #endif // ScrollableArea_h |
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