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| 1 /* | 1 /* |
| 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. | 2 * Copyright (C) 2008 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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| 84 protected: | 84 protected: |
| 85 void styleWillChange(StyleDifference, const ComputedStyle& newStyle) override; | 85 void styleWillChange(StyleDifference, const ComputedStyle& newStyle) override; |
| 86 void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override; | 86 void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override; |
| 87 void imageChanged(WrappedImagePtr, const IntRect* = nullptr) override; | 87 void imageChanged(WrappedImagePtr, const IntRect* = nullptr) override; |
| 88 | 88 |
| 89 private: | 89 private: |
| 90 LayoutScrollbarPart(ScrollableArea*, LayoutScrollbar*, ScrollbarPart); | 90 LayoutScrollbarPart(ScrollableArea*, LayoutScrollbar*, ScrollbarPart); |
| 91 | 91 |
| 92 void computePreferredLogicalWidths() override; | 92 void computePreferredLogicalWidths() override; |
| 93 | 93 |
| 94 // Have all padding getters return 0. The important point here is to avoid res
olving percents | 94 // Have all padding getters return 0. The important point here is to avoid |
| 95 // against the containing block, since scroll bar corners don't always have on
e (so it would | 95 // resolving percents against the containing block, since scroll bar corners |
| 96 // crash). Scroll bar corners are not actually laid out, and they don't have c
hild content, so | 96 // don't always have one (so it would crash). Scroll bar corners are not |
| 97 // what we return here doesn't really matter. | 97 // actually laid out, and they don't have child content, so what we return |
| 98 // here doesn't really matter. |
| 98 LayoutUnit paddingTop() const override { return LayoutUnit(); } | 99 LayoutUnit paddingTop() const override { return LayoutUnit(); } |
| 99 LayoutUnit paddingBottom() const override { return LayoutUnit(); } | 100 LayoutUnit paddingBottom() const override { return LayoutUnit(); } |
| 100 LayoutUnit paddingLeft() const override { return LayoutUnit(); } | 101 LayoutUnit paddingLeft() const override { return LayoutUnit(); } |
| 101 LayoutUnit paddingRight() const override { return LayoutUnit(); } | 102 LayoutUnit paddingRight() const override { return LayoutUnit(); } |
| 102 LayoutUnit paddingBefore() const override { return LayoutUnit(); } | 103 LayoutUnit paddingBefore() const override { return LayoutUnit(); } |
| 103 LayoutUnit paddingAfter() const override { return LayoutUnit(); } | 104 LayoutUnit paddingAfter() const override { return LayoutUnit(); } |
| 104 LayoutUnit paddingStart() const override { return LayoutUnit(); } | 105 LayoutUnit paddingStart() const override { return LayoutUnit(); } |
| 105 LayoutUnit paddingEnd() const override { return LayoutUnit(); } | 106 LayoutUnit paddingEnd() const override { return LayoutUnit(); } |
| 106 | 107 |
| 107 void layoutHorizontalPart(); | 108 void layoutHorizontalPart(); |
| 108 void layoutVerticalPart(); | 109 void layoutVerticalPart(); |
| 109 | 110 |
| 110 void computeScrollbarWidth(); | 111 void computeScrollbarWidth(); |
| 111 void computeScrollbarHeight(); | 112 void computeScrollbarHeight(); |
| 112 | 113 |
| 113 void setNeedsPaintInvalidation(); | 114 void setNeedsPaintInvalidation(); |
| 114 | 115 |
| 115 bool allowsOverflowClip() const override { return false; } | 116 bool allowsOverflowClip() const override { return false; } |
| 116 | 117 |
| 117 UntracedMember<ScrollableArea> m_scrollableArea; | 118 UntracedMember<ScrollableArea> m_scrollableArea; |
| 118 UntracedMember<LayoutScrollbar> m_scrollbar; | 119 UntracedMember<LayoutScrollbar> m_scrollbar; |
| 119 ScrollbarPart m_part; | 120 ScrollbarPart m_part; |
| 120 }; | 121 }; |
| 121 | 122 |
| 122 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutScrollbarPart, isLayoutScrollbarPart()); | 123 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutScrollbarPart, isLayoutScrollbarPart()); |
| 123 | 124 |
| 124 } // namespace blink | 125 } // namespace blink |
| 125 | 126 |
| 126 #endif // LayoutScrollbarPart_h | 127 #endif // LayoutScrollbarPart_h |
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