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/*
* Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
* Copyright (C) 2005 Eric Seidel <eric@webkit.org>
* Copyright (C) 2006 Apple Computer, Inc
* Copyright (C) 2009 Google, Inc.
* Copyright (C) 2011 Renata Hodovan <reni@webkit.org>
* Copyright (C) 2011 University of Szeged
*
* 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 LayoutSVGShape_h
#define LayoutSVGShape_h
#include "core/layout/svg/LayoutSVGModelObject.h"
#include "core/layout/svg/SVGMarkerData.h"
#include "platform/geometry/FloatRect.h"
#include "platform/transforms/AffineTransform.h"
#include "wtf/OwnPtr.h"
#include "wtf/Vector.h"
namespace blink {
class FloatPoint;
class PointerEventsHitRules;
class SVGGeometryElement;
enum ShapeGeometryCodePath {
PathGeometry,
RectGeometryFastPath,
EllipseGeometryFastPath
};
struct LayoutSVGShapeRareData {
WTF_MAKE_NONCOPYABLE(LayoutSVGShapeRareData);
USING_FAST_MALLOC(LayoutSVGShapeRareData);
public:
LayoutSVGShapeRareData() {}
Path m_cachedNonScalingStrokePath;
AffineTransform m_cachedNonScalingStrokeTransform;
};
class LayoutSVGShape : public LayoutSVGModelObject {
public:
explicit LayoutSVGShape(SVGGeometryElement*);
~LayoutSVGShape() override;
void setNeedsShapeUpdate() { m_needsShapeUpdate = true; }
void setNeedsBoundariesUpdate() final { m_needsBoundariesUpdate = true; }
void setNeedsTransformUpdate() final { m_needsTransformUpdate = true; }
bool nodeAtFloatPointInternal(const HitTestRequest&, const FloatPoint&, PointerEventsHitRules);
Path& path() const
{
ASSERT(m_path);
return *m_path;
}
bool hasPath() const { return m_path.get(); }
float dashScaleFactor() const;
virtual bool isShapeEmpty() const { return path().isEmpty(); }
bool hasNonScalingStroke() const { return style()->svgStyle().vectorEffect() == VE_NON_SCALING_STROKE; }
Path* nonScalingStrokePath(const Path*, const AffineTransform&) const;
AffineTransform nonScalingStrokeTransform() const;
AffineTransform localSVGTransform() const final { return m_localTransform; }
virtual const Vector<MarkerPosition>* markerPositions() const { return nullptr; }
float strokeWidth() const;
virtual ShapeGeometryCodePath geometryCodePath() const { return PathGeometry; }
FloatRect objectBoundingBox() const final { return m_fillBoundingBox; }
const char* name() const override { return "LayoutSVGShape"; }
protected:
void clearPath() { m_path.clear(); }
void createPath();
virtual void updateShapeFromElement();
// Calculates an inclusive bounding box of this shape as if this shape has
// a stroke. If this shape has a stroke, then m_strokeBoundingBox is returned;
// otherwise, estimates a bounding box (not necessarily tight) that would
// include this shape's stroke bounding box if it had a stroke.
virtual FloatRect hitTestStrokeBoundingBox() const;
virtual bool shapeDependentStrokeContains(const FloatPoint&);
virtual bool shapeDependentFillContains(const FloatPoint&, const WindRule) const;
FloatRect m_fillBoundingBox;
FloatRect m_strokeBoundingBox;
LayoutSVGShapeRareData& ensureRareData() const;
private:
// Hit-detection separated for the fill and the stroke
bool fillContains(const FloatPoint&, bool requiresFill = true, const WindRule fillRule = RULE_NONZERO);
bool strokeContains(const FloatPoint&, bool requiresStroke = true);
const AffineTransform& localToSVGParentTransform() const final { return m_localTransform; }
bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectSVGShape || LayoutSVGModelObject::isOfType(type); }
void layout() final;
void paint(const PaintInfo&, const LayoutPoint&) const final;
void addOutlineRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, IncludeBlockVisualOverflowOrNot) const final;
bool nodeAtFloatPoint(HitTestResult&, const FloatPoint& pointInParent, HitTestAction) final;
FloatRect strokeBoundingBox() const final { return m_strokeBoundingBox; }
FloatRect calculateObjectBoundingBox() const;
FloatRect calculateStrokeBoundingBox() const;
void updatePaintInvalidationBoundingBox();
void updateLocalTransform();
private:
AffineTransform m_localTransform;
// TODO(fmalita): the Path is now cached in SVGPath; while this additional cache is just a
// shallow copy, it certainly has a complexity/state management cost (plus allocation & storage
// overhead) - so we should look into removing it.
OwnPtr<Path> m_path;
mutable OwnPtr<LayoutSVGShapeRareData> m_rareData;
bool m_needsBoundariesUpdate : 1;
bool m_needsShapeUpdate : 1;
bool m_needsTransformUpdate : 1;
};
DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGShape, isSVGShape());
} // namespace blink
#endif
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