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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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| 48 m_mapCoordinatesFlags(flags) {} | 48 m_mapCoordinatesFlags(flags) {} |
| 49 | 49 |
| 50 LayoutGeometryMap::~LayoutGeometryMap() {} | 50 LayoutGeometryMap::~LayoutGeometryMap() {} |
| 51 | 51 |
| 52 void LayoutGeometryMap::mapToAncestor( | 52 void LayoutGeometryMap::mapToAncestor( |
| 53 TransformState& transformState, | 53 TransformState& transformState, |
| 54 const LayoutBoxModelObject* ancestor) const { | 54 const LayoutBoxModelObject* ancestor) const { |
| 55 // If the mapping includes something like columns, we have to go via | 55 // If the mapping includes something like columns, we have to go via |
| 56 // layoutObjects. | 56 // layoutObjects. |
| 57 if (hasNonUniformStep()) { | 57 if (hasNonUniformStep()) { |
| 58 m_mapping.last().m_layoutObject->mapLocalToAncestor( | 58 m_mapping.back().m_layoutObject->mapLocalToAncestor( |
| 59 ancestor, transformState, ApplyContainerFlip | m_mapCoordinatesFlags); | 59 ancestor, transformState, ApplyContainerFlip | m_mapCoordinatesFlags); |
| 60 transformState.flatten(); | 60 transformState.flatten(); |
| 61 return; | 61 return; |
| 62 } | 62 } |
| 63 | 63 |
| 64 bool inFixed = false; | 64 bool inFixed = false; |
| 65 #if ENABLE(ASSERT) | 65 #if ENABLE(ASSERT) |
| 66 bool foundAncestor = !ancestor || (m_mapping.size() && | 66 bool foundAncestor = !ancestor || (m_mapping.size() && |
| 67 m_mapping[0].m_layoutObject == ancestor); | 67 m_mapping[0].m_layoutObject == ancestor); |
| 68 #endif | 68 #endif |
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| 148 result.move(m_accumulatedOffset); | 148 result.move(m_accumulatedOffset); |
| 149 } else { | 149 } else { |
| 150 TransformState transformState(TransformState::ApplyTransformDirection, | 150 TransformState transformState(TransformState::ApplyTransformDirection, |
| 151 rect.center(), rect); | 151 rect.center(), rect); |
| 152 mapToAncestor(transformState, ancestor); | 152 mapToAncestor(transformState, ancestor); |
| 153 result = transformState.lastPlanarQuad(); | 153 result = transformState.lastPlanarQuad(); |
| 154 } | 154 } |
| 155 | 155 |
| 156 #if ENABLE(ASSERT) | 156 #if ENABLE(ASSERT) |
| 157 if (m_mapping.size() > 0) { | 157 if (m_mapping.size() > 0) { |
| 158 const LayoutObject* lastLayoutObject = m_mapping.last().m_layoutObject; | 158 const LayoutObject* lastLayoutObject = m_mapping.back().m_layoutObject; |
| 159 | 159 |
| 160 FloatRect layoutObjectMappedResult = | 160 FloatRect layoutObjectMappedResult = |
| 161 lastLayoutObject | 161 lastLayoutObject |
| 162 ->localToAncestorQuad(rect, ancestor, m_mapCoordinatesFlags) | 162 ->localToAncestorQuad(rect, ancestor, m_mapCoordinatesFlags) |
| 163 .boundingBox(); | 163 .boundingBox(); |
| 164 | 164 |
| 165 // Inspector creates layoutObjects with negative width | 165 // Inspector creates layoutObjects with negative width |
| 166 // <https://bugs.webkit.org/show_bug.cgi?id=87194>. | 166 // <https://bugs.webkit.org/show_bug.cgi?id=87194>. |
| 167 // Taking FloatQuad bounds avoids spurious assertions because of that. | 167 // Taking FloatQuad bounds avoids spurious assertions because of that. |
| 168 ASSERT(enclosingIntRect(layoutObjectMappedResult) == | 168 ASSERT(enclosingIntRect(layoutObjectMappedResult) == |
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| 300 | 300 |
| 301 stepInserted(step); | 301 stepInserted(step); |
| 302 } | 302 } |
| 303 | 303 |
| 304 void LayoutGeometryMap::popMappingsToAncestor( | 304 void LayoutGeometryMap::popMappingsToAncestor( |
| 305 const LayoutBoxModelObject* ancestorLayoutObject) { | 305 const LayoutBoxModelObject* ancestorLayoutObject) { |
| 306 ASSERT(m_mapping.size()); | 306 ASSERT(m_mapping.size()); |
| 307 | 307 |
| 308 bool mightBeSaturated = false; | 308 bool mightBeSaturated = false; |
| 309 while (m_mapping.size() && | 309 while (m_mapping.size() && |
| 310 m_mapping.last().m_layoutObject != ancestorLayoutObject) { | 310 m_mapping.back().m_layoutObject != ancestorLayoutObject) { |
| 311 mightBeSaturated = | 311 mightBeSaturated = |
| 312 mightBeSaturated || m_accumulatedOffset.width().mightBeSaturated(); | 312 mightBeSaturated || m_accumulatedOffset.width().mightBeSaturated(); |
| 313 mightBeSaturated = | 313 mightBeSaturated = |
| 314 mightBeSaturated || m_accumulatedOffset.height().mightBeSaturated(); | 314 mightBeSaturated || m_accumulatedOffset.height().mightBeSaturated(); |
| 315 stepRemoved(m_mapping.last()); | 315 stepRemoved(m_mapping.back()); |
| 316 m_mapping.pop_back(); | 316 m_mapping.pop_back(); |
| 317 } | 317 } |
| 318 if (UNLIKELY(mightBeSaturated)) { | 318 if (UNLIKELY(mightBeSaturated)) { |
| 319 m_accumulatedOffset = LayoutSize(); | 319 m_accumulatedOffset = LayoutSize(); |
| 320 for (const auto& step : m_mapping) | 320 for (const auto& step : m_mapping) |
| 321 m_accumulatedOffset += step.m_offset; | 321 m_accumulatedOffset += step.m_offset; |
| 322 } | 322 } |
| 323 } | 323 } |
| 324 | 324 |
| 325 void LayoutGeometryMap::popMappingsToAncestor(const PaintLayer* ancestorLayer) { | 325 void LayoutGeometryMap::popMappingsToAncestor(const PaintLayer* ancestorLayer) { |
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| 369 // If we're not working with multiple LayoutViews, then any view is considered | 369 // If we're not working with multiple LayoutViews, then any view is considered |
| 370 // "topmost" (to preserve original behavior). | 370 // "topmost" (to preserve original behavior). |
| 371 if (!(m_mapCoordinatesFlags & TraverseDocumentBoundaries)) | 371 if (!(m_mapCoordinatesFlags & TraverseDocumentBoundaries)) |
| 372 return true; | 372 return true; |
| 373 | 373 |
| 374 return layoutObject->frame()->isMainFrame(); | 374 return layoutObject->frame()->isMainFrame(); |
| 375 } | 375 } |
| 376 #endif | 376 #endif |
| 377 | 377 |
| 378 } // namespace blink | 378 } // namespace blink |
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