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| 1 /* | 1 /* |
| 2 * Copyright (C) 2012 Apple Inc. All rights reserved. | 2 * Copyright (C) 2012 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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| 44 class TransformState; | 44 class TransformState; |
| 45 | 45 |
| 46 // Can be used while walking the layout tree to cache data about offsets and tra
nsforms. | 46 // Can be used while walking the layout tree to cache data about offsets and tra
nsforms. |
| 47 class CORE_EXPORT LayoutGeometryMap { | 47 class CORE_EXPORT LayoutGeometryMap { |
| 48 DISALLOW_NEW(); | 48 DISALLOW_NEW(); |
| 49 WTF_MAKE_NONCOPYABLE(LayoutGeometryMap); | 49 WTF_MAKE_NONCOPYABLE(LayoutGeometryMap); |
| 50 public: | 50 public: |
| 51 LayoutGeometryMap(MapCoordinatesFlags = UseTransforms); | 51 LayoutGeometryMap(MapCoordinatesFlags = UseTransforms); |
| 52 ~LayoutGeometryMap(); | 52 ~LayoutGeometryMap(); |
| 53 | 53 |
| 54 MapCoordinatesFlags mapCoordinatesFlags() const { return m_mapCoordinatesFla
gs; } | 54 MapCoordinatesFlags getMapCoordinatesFlags() const { return m_mapCoordinates
Flags; } |
| 55 | 55 |
| 56 FloatRect absoluteRect(const FloatRect& rect) const | 56 FloatRect absoluteRect(const FloatRect& rect) const |
| 57 { | 57 { |
| 58 return mapToAncestor(rect, 0).boundingBox(); | 58 return mapToAncestor(rect, 0).boundingBox(); |
| 59 } | 59 } |
| 60 | 60 |
| 61 // Map to an ancestor. Will assert that the ancestor has been pushed onto th
is map. | 61 // Map to an ancestor. Will assert that the ancestor has been pushed onto th
is map. |
| 62 // A null ancestor maps through the LayoutView (including its scale transfor
m, if any). | 62 // A null ancestor maps through the LayoutView (including its scale transfor
m, if any). |
| 63 // If the ancestor is the LayoutView, the scroll offset is applied, but not
the scale. | 63 // If the ancestor is the LayoutView, the scroll offset is applied, but not
the scale. |
| 64 FloatQuad mapToAncestor(const FloatRect&, const LayoutBoxModelObject*) const
; | 64 FloatQuad mapToAncestor(const FloatRect&, const LayoutBoxModelObject*) const
; |
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| 101 int m_transformedStepsCount; | 101 int m_transformedStepsCount; |
| 102 int m_fixedStepsCount; | 102 int m_fixedStepsCount; |
| 103 LayoutGeometryMapSteps m_mapping; | 103 LayoutGeometryMapSteps m_mapping; |
| 104 LayoutSize m_accumulatedOffset; | 104 LayoutSize m_accumulatedOffset; |
| 105 MapCoordinatesFlags m_mapCoordinatesFlags; | 105 MapCoordinatesFlags m_mapCoordinatesFlags; |
| 106 }; | 106 }; |
| 107 | 107 |
| 108 } // namespace blink | 108 } // namespace blink |
| 109 | 109 |
| 110 #endif // LayoutGeometryMap_h | 110 #endif // LayoutGeometryMap_h |
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