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Diffstat (limited to 'Source/WebCore/rendering/RenderGeometryMap.h')
-rw-r--r-- | Source/WebCore/rendering/RenderGeometryMap.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/RenderGeometryMap.h b/Source/WebCore/rendering/RenderGeometryMap.h new file mode 100644 index 000000000..6a6120333 --- /dev/null +++ b/Source/WebCore/rendering/RenderGeometryMap.h @@ -0,0 +1,85 @@ +/* + * 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 RenderGeometryMap_h +#define RenderGeometryMap_h + +#include "FloatPoint.h" +#include "FloatQuad.h" +#include "IntSize.h" +#include "RenderObject.h" +#include "TransformationMatrix.h" +#include <wtf/OwnPtr.h> + +namespace WebCore { + +class RenderGeometryMapStep; + +// Can be used while walking the Renderer tree to cache data about offsets and transforms. +class RenderGeometryMap { +public: + RenderGeometryMap(); + ~RenderGeometryMap(); + + FloatPoint absolutePoint(const FloatPoint&) const; + FloatRect absoluteRect(const FloatRect&) const; + + // Called by code walking the renderer or layer trees. + void pushMappingsToAncestor(const RenderObject*, const RenderBoxModelObject* ancestor); + void popMappingsToAncestor(const RenderBoxModelObject*); + + // The following methods should only be called by renderers inside a call to pushMappingsToAncestor(). + + // Push geometry info between this renderer and some ancestor. The ancestor must be its container() or some + // stacking context between the renderer and its container. + void push(const RenderObject*, const LayoutSize&, bool accumulatingTransform = false, bool isNonUniform = false, bool isFixedPosition = false, bool hasTransform = false); + void push(const RenderObject*, const TransformationMatrix&, bool accumulatingTransform = false, bool isNonUniform = false, bool isFixedPosition = false, bool hasTransform = false); + + // RenderView gets special treatment, because it applies the scroll offset only for elements inside in fixed position. + void pushView(const RenderView*, const LayoutSize& scrollOffset, const TransformationMatrix* = 0); + +private: + void mapToAbsolute(TransformState&) const; + + void stepInserted(const RenderGeometryMapStep&); + void stepRemoved(const RenderGeometryMapStep&); + + bool hasNonUniformStep() const { return m_nonUniformStepsCount; } + bool hasTransformStep() const { return m_transformedStepsCount; } + bool hasFixedPositionStep() const { return m_fixedStepsCount; } + + typedef Vector<OwnPtr<RenderGeometryMapStep> > RenderGeometryMapSteps; // FIXME: inline capacity? + + size_t m_insertionPosition; + int m_nonUniformStepsCount; + int m_transformedStepsCount; + int m_fixedStepsCount; + RenderGeometryMapSteps m_mapping; + LayoutSize m_accumulatedOffset; +}; + +} // namespace WebCore + +#endif // RenderGeometryMap_h |