| /* |
| * Copyright (C) 2012 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_GEOMETRY_MAP_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_GEOMETRY_MAP_H_ |
| |
| #include "base/macros.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/layout/layout_geometry_map_step.h" |
| #include "third_party/blink/renderer/core/layout/map_coordinates_flags.h" |
| #include "third_party/blink/renderer/platform/geometry/float_point.h" |
| #include "third_party/blink/renderer/platform/geometry/float_quad.h" |
| #include "third_party/blink/renderer/platform/geometry/int_size.h" |
| #include "third_party/blink/renderer/platform/geometry/layout_size.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/vector.h" |
| |
| namespace blink { |
| |
| class PaintLayer; |
| class LayoutBoxModelObject; |
| class LayoutObject; |
| class TransformationMatrix; |
| class TransformState; |
| |
| // Can be used while walking the layout tree to cache data about offsets and |
| // transforms. |
| class CORE_EXPORT LayoutGeometryMap { |
| DISALLOW_NEW(); |
| |
| public: |
| LayoutGeometryMap(MapCoordinatesFlags = kUseTransforms); |
| ~LayoutGeometryMap(); |
| |
| MapCoordinatesFlags GetMapCoordinatesFlags() const { |
| return map_coordinates_flags_; |
| } |
| |
| FloatRect AbsoluteRect(const FloatRect& rect) const { |
| return MapToAncestor(rect, nullptr).BoundingBox(); |
| } |
| |
| // Map to an ancestor. Will assert that the ancestor has been pushed onto this |
| // map. A null ancestor maps through the LayoutView (including its scale |
| // transform, if any). If the ancestor is the LayoutView, the scroll offset is |
| // applied, but not the scale. |
| FloatQuad MapToAncestor(const FloatRect&, const LayoutBoxModelObject*) const; |
| |
| // Called by code walking the layout or layer trees. |
| void PushMappingsToAncestor(const PaintLayer*, |
| const PaintLayer* ancestor_layer); |
| void PopMappingsToAncestor(const PaintLayer*); |
| void PushMappingsToAncestor( |
| const LayoutObject*, |
| const LayoutBoxModelObject* ancestor_layout_object); |
| |
| // The following methods should only be called by layoutObjects inside a call |
| // to pushMappingsToAncestor(). |
| |
| // Push geometry info between this layoutObject and some ancestor. The |
| // ancestor must be its container() or some stacking context between the |
| // layoutObject and its container. |
| void Push(const LayoutObject*, |
| const LayoutSize&, |
| GeometryInfoFlags = 0, |
| LayoutSize offset_for_fixed_position = LayoutSize()); |
| void Push(const LayoutObject*, |
| const TransformationMatrix&, |
| GeometryInfoFlags = 0, |
| LayoutSize offset_for_fixed_position = LayoutSize()); |
| |
| private: |
| void PopMappingsToAncestor(const LayoutBoxModelObject*); |
| void MapToAncestor(TransformState&, |
| const LayoutBoxModelObject* ancestor = nullptr) const; |
| |
| void StepInserted(const LayoutGeometryMapStep&); |
| void StepRemoved(const LayoutGeometryMapStep&); |
| |
| bool HasNonUniformStep() const { return non_uniform_steps_count_; } |
| bool HasTransformStep() const { return transformed_steps_count_; } |
| bool HasFixedPositionStep() const { return fixed_steps_count_; } |
| |
| #ifndef NDEBUG |
| void DumpSteps() const; |
| #endif |
| |
| #if DCHECK_IS_ON() |
| bool IsTopmostLayoutView(const LayoutObject*) const; |
| #endif |
| |
| typedef Vector<LayoutGeometryMapStep, 32> LayoutGeometryMapSteps; |
| |
| wtf_size_t insertion_position_; |
| int non_uniform_steps_count_; |
| int transformed_steps_count_; |
| int fixed_steps_count_; |
| LayoutGeometryMapSteps mapping_; |
| LayoutSize accumulated_offset_; |
| MapCoordinatesFlags map_coordinates_flags_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LayoutGeometryMap); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_GEOMETRY_MAP_H_ |