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