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1 /* | 1 /* |
2 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved. | 2 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. | 4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. |
5 * | 5 * |
6 * Other contributors: | 6 * Other contributors: |
7 * Robert O'Callahan <roc+@cs.cmu.edu> | 7 * Robert O'Callahan <roc+@cs.cmu.edu> |
8 * David Baron <dbaron@fas.harvard.edu> | 8 * David Baron <dbaron@fas.harvard.edu> |
9 * Christian Biesinger <cbiesinger@web.de> | 9 * Christian Biesinger <cbiesinger@web.de> |
10 * Randall Jesup <rjesup@wgate.com> | 10 * Randall Jesup <rjesup@wgate.com> |
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62 class LayoutBox; | 62 class LayoutBox; |
63 class PaintLayer; | 63 class PaintLayer; |
64 class LayoutScrollbarPart; | 64 class LayoutScrollbarPart; |
65 | 65 |
66 typedef WTF::HashMap<PaintLayer*, StickyPositionScrollingConstraints> StickyCons
traintsMap; | 66 typedef WTF::HashMap<PaintLayer*, StickyPositionScrollingConstraints> StickyCons
traintsMap; |
67 | 67 |
68 struct PaintLayerScrollableAreaRareData { | 68 struct PaintLayerScrollableAreaRareData { |
69 WTF_MAKE_NONCOPYABLE(PaintLayerScrollableAreaRareData); | 69 WTF_MAKE_NONCOPYABLE(PaintLayerScrollableAreaRareData); |
70 USING_FAST_MALLOC(PaintLayerScrollableAreaRareData); | 70 USING_FAST_MALLOC(PaintLayerScrollableAreaRareData); |
71 public: | 71 public: |
72 PaintLayerScrollableAreaRareData() {} | 72 PaintLayerScrollableAreaRareData(); |
73 | 73 |
74 StickyConstraintsMap m_stickyConstraintsMap; | 74 StickyConstraintsMap m_stickyConstraintsMap; |
75 }; | 75 }; |
76 | 76 |
77 // PaintLayerScrollableArea represents the scrollable area of a LayoutBox. | 77 // PaintLayerScrollableArea represents the scrollable area of a LayoutBox. |
78 // | 78 // |
79 // To be scrollable, an element requires ‘overflow’ != visible. Note that this | 79 // To be scrollable, an element requires ‘overflow’ != visible. Note that this |
80 // doesn’t imply having scrollbars as you can always programmatically scroll | 80 // doesn’t imply having scrollbars as you can always programmatically scroll |
81 // when ‘overflow’ is hidden (using JavaScript's element.scrollTo or | 81 // when ‘overflow’ is hidden (using JavaScript's element.scrollTo or |
82 // scrollLeft). | 82 // scrollLeft). |
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455 #endif | 455 #endif |
456 }; | 456 }; |
457 | 457 |
458 DEFINE_TYPE_CASTS(PaintLayerScrollableArea, ScrollableArea, scrollableArea, | 458 DEFINE_TYPE_CASTS(PaintLayerScrollableArea, ScrollableArea, scrollableArea, |
459 scrollableArea->isPaintLayerScrollableArea(), | 459 scrollableArea->isPaintLayerScrollableArea(), |
460 scrollableArea.isPaintLayerScrollableArea()); | 460 scrollableArea.isPaintLayerScrollableArea()); |
461 | 461 |
462 } // namespace blink | 462 } // namespace blink |
463 | 463 |
464 #endif // LayerScrollableArea_h | 464 #endif // LayerScrollableArea_h |
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