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* Copyright (C) 2007 Rob Buis <buis@kde.org>
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* Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
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* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
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* Copyright (C) 2009 Google, Inc. All rights reserved.
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* Copyright (C) Research In Motion Limited 2010. All rights reserved.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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#ifndef SVGRenderSupport_h
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#define SVGRenderSupport_h
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#include "PaintInfo.h"
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class RenderBoxModelObject;
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class RenderGeometryMap;
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class RenderLayerModelObject;
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// SVGRendererSupport is a helper class sharing code between all SVG renderers.
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class SVGRenderSupport {
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// Shares child layouting code between RenderSVGRoot/RenderSVG(Hidden)Container
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static void layoutChildren(RenderObject*, bool selfNeedsLayout);
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// Helper function determining wheter overflow is hidden
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static bool isOverflowHidden(const RenderObject*);
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static void intersectRepaintRectWithShadows(const RenderObject*, FloatRect&);
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// Calculates the repaintRect in combination with filter, clipper and masker in local coordinates.
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static void intersectRepaintRectWithResources(const RenderObject*, FloatRect&);
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// Determines whether a container needs to be laid out because it's filtered and a child is being laid out.
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static bool filtersForceContainerLayout(RenderObject*);
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// Determines whether the passed point lies in a clipping area
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static bool pointInClippingArea(RenderObject*, const FloatPoint&);
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static void computeContainerBoundingBoxes(const RenderObject* container, FloatRect& objectBoundingBox, bool& objectBoundingBoxValid, FloatRect& strokeBoundingBox, FloatRect& repaintBoundingBox);
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static bool paintInfoIntersectsRepaintRect(const FloatRect& localRepaintRect, const AffineTransform& localTransform, const PaintInfo&);
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// Important functions used by nearly all SVG renderers centralizing coordinate transformations / repaint rect calculations
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static FloatRect repaintRectForRendererInLocalCoordinatesExcludingSVGShadow(const RenderObject*);
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static LayoutRect clippedOverflowRectForRepaint(const RenderObject*, const RenderLayerModelObject* repaintContainer);
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static void computeFloatRectForRepaint(const RenderObject*, const RenderLayerModelObject* repaintContainer, FloatRect&, bool fixed);
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static void mapLocalToContainer(const RenderObject*, const RenderLayerModelObject* repaintContainer, TransformState&, bool snapOffsetForTransforms = true, bool* wasFixed = 0);
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static const RenderObject* pushMappingToContainer(const RenderObject*, const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&);
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static bool checkForSVGRepaintDuringLayout(RenderObject*);
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// Shared between SVG renderers and resources.
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static void applyStrokeStyleToContext(GraphicsContext*, const RenderStyle*, const RenderObject*);
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// Determines if any ancestor's transform has changed.
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static bool transformToRootChanged(RenderObject*);
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// Helper functions to keep track of whether a renderer has an SVG shadow applied.
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static bool rendererHasSVGShadow(const RenderObject*);
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static void setRendererHasSVGShadow(RenderObject*, bool hasShadow);
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static void childAdded(RenderObject* parent, RenderObject* child);
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static void styleChanged(RenderObject*);
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// FIXME: These methods do not belong here.
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static const RenderSVGRoot* findTreeRootObject(const RenderObject*);
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// This class is not constructable.
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} // namespace WebCore
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#endif // SVGRenderSupport_h