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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.
*/
#pragma once
#include "PaintInfo.h"
#include "RenderObject.h"
namespace WebCore {
class FloatPoint;
class FloatRect;
class ImageBuffer;
class LayoutRect;
class RenderBoxModelObject;
class RenderElement;
class RenderGeometryMap;
class RenderLayerModelObject;
class RenderStyle;
class RenderSVGRoot;
class TransformState;
// SVGRendererSupport is a helper class sharing code between all SVG renderers.
class SVGRenderSupport {
public:
static void layoutDifferentRootIfNeeded(const RenderElement&);
// Shares child layouting code between RenderSVGRoot/RenderSVG(Hidden)Container
static void layoutChildren(RenderElement&, bool selfNeedsLayout);
// Helper function determining wheter overflow is hidden
static bool isOverflowHidden(const RenderElement&);
// Calculates the repaintRect in combination with filter, clipper and masker in local coordinates.
static void intersectRepaintRectWithResources(const RenderElement&, FloatRect&);
// Determines whether a container needs to be laid out because it's filtered and a child is being laid out.
static bool filtersForceContainerLayout(const RenderElement&);
// Determines whether the passed point lies in a clipping area
static bool pointInClippingArea(const RenderElement&, const FloatPoint&);
static void computeContainerBoundingBoxes(const RenderElement& container, FloatRect& objectBoundingBox, bool& objectBoundingBoxValid, FloatRect& strokeBoundingBox, FloatRect& repaintBoundingBox);
static bool paintInfoIntersectsRepaintRect(const FloatRect& localRepaintRect, const AffineTransform& localTransform, const PaintInfo&);
// Important functions used by nearly all SVG renderers centralizing coordinate transformations / repaint rect calculations
static LayoutRect clippedOverflowRectForRepaint(const RenderElement&, const RenderLayerModelObject* repaintContainer);
static Optional<FloatRect> computeFloatVisibleRectInContainer(const RenderElement&, const FloatRect&, const RenderLayerModelObject* container, RenderObject::VisibleRectContext);
static const RenderElement& localToParentTransform(const RenderElement&, AffineTransform &);
static void mapLocalToContainer(const RenderElement&, const RenderLayerModelObject* repaintContainer, TransformState&, bool* wasFixed);
static const RenderElement* pushMappingToContainer(const RenderElement&, const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&);
static bool checkForSVGRepaintDuringLayout(const RenderElement&);
// Shared between SVG renderers and resources.
static void applyStrokeStyleToContext(GraphicsContext*, const RenderStyle&, const RenderElement&);
// Determines if any ancestor's transform has changed.
static bool transformToRootChanged(RenderElement*);
static void clipContextToCSSClippingArea(GraphicsContext&, const RenderElement& renderer);
static void styleChanged(RenderElement&, const RenderStyle*);
#if ENABLE(CSS_COMPOSITING)
static bool isolatesBlending(const RenderStyle&);
static void updateMaskedAncestorShouldIsolateBlending(const RenderElement&);
#endif
static RenderSVGRoot* findTreeRootObject(RenderElement&);
static const RenderSVGRoot* findTreeRootObject(const RenderElement&);
private:
// This class is not constructable.
SVGRenderSupport();
~SVGRenderSupport();
};
} // namespace WebCore