1/*
2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4 * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
5 * Copyright (C) 2006 Apple Computer, Inc
6 * Copyright (C) 2009 Google, Inc.
7 * Copyright (C) 2011 Renata Hodovan <reni@webkit.org>
8 * Copyright (C) 2011 University of Szeged
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18 * Library General Public License for more details.
19 *
20 * You should have received a copy of the GNU Library General Public License
21 * along with this library; see the file COPYING.LIB.  If not, write to
22 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
24 */
25
26#ifndef RenderSVGShape_h
27#define RenderSVGShape_h
28
29#include "core/rendering/svg/RenderSVGModelObject.h"
30#include "core/rendering/svg/SVGMarkerData.h"
31#include "platform/geometry/FloatRect.h"
32#include "platform/transforms/AffineTransform.h"
33#include "wtf/OwnPtr.h"
34#include "wtf/Vector.h"
35
36namespace WebCore {
37
38class FloatPoint;
39class GraphicsContextStateSaver;
40class PointerEventsHitRules;
41class SVGGraphicsElement;
42
43class RenderSVGShape : public RenderSVGModelObject {
44public:
45    explicit RenderSVGShape(SVGGraphicsElement*);
46    RenderSVGShape(SVGGraphicsElement*, Path*, bool);
47    virtual ~RenderSVGShape();
48
49    void setNeedsShapeUpdate() { m_needsShapeUpdate = true; }
50    virtual void setNeedsBoundariesUpdate() OVERRIDE FINAL { m_needsBoundariesUpdate = true; }
51    virtual void setNeedsTransformUpdate() OVERRIDE FINAL { m_needsTransformUpdate = true; }
52    virtual void fillShape(GraphicsContext*) const;
53    virtual void strokeShape(GraphicsContext*) const;
54
55    bool nodeAtFloatPointInternal(const HitTestRequest&, const FloatPoint&, PointerEventsHitRules);
56
57    Path& path() const
58    {
59        ASSERT(m_path);
60        return *m_path;
61    }
62
63protected:
64    virtual void updateShapeFromElement();
65    virtual bool isShapeEmpty() const { return path().isEmpty(); }
66    virtual bool shapeDependentStrokeContains(const FloatPoint&);
67    virtual bool shapeDependentFillContains(const FloatPoint&, const WindRule) const;
68    float strokeWidth() const;
69    bool hasPath() const { return m_path.get(); }
70    bool hasSmoothStroke() const;
71
72    bool hasNonScalingStroke() const { return style()->svgStyle()->vectorEffect() == VE_NON_SCALING_STROKE; }
73    AffineTransform nonScalingStrokeTransform() const;
74    Path* nonScalingStrokePath(const Path*, const AffineTransform&) const;
75
76    FloatRect m_fillBoundingBox;
77    FloatRect m_strokeBoundingBox;
78
79private:
80    // Hit-detection separated for the fill and the stroke
81    bool fillContains(const FloatPoint&, bool requiresFill = true, const WindRule fillRule = RULE_NONZERO);
82    bool strokeContains(const FloatPoint&, bool requiresStroke = true);
83
84    virtual FloatRect paintInvalidationRectInLocalCoordinates() const OVERRIDE FINAL { return m_repaintBoundingBox; }
85    virtual const AffineTransform& localToParentTransform() const OVERRIDE FINAL { return m_localTransform; }
86    virtual AffineTransform localTransform() const OVERRIDE FINAL { return m_localTransform; }
87
88    virtual bool isSVGShape() const OVERRIDE FINAL { return true; }
89    virtual const char* renderName() const OVERRIDE { return "RenderSVGShape"; }
90
91    virtual void layout() OVERRIDE FINAL;
92    virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL;
93    virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) OVERRIDE FINAL;
94
95    virtual bool nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint& pointInParent, HitTestAction) OVERRIDE FINAL;
96
97    virtual FloatRect objectBoundingBox() const OVERRIDE FINAL { return m_fillBoundingBox; }
98    virtual FloatRect strokeBoundingBox() const OVERRIDE FINAL { return m_strokeBoundingBox; }
99    FloatRect calculateObjectBoundingBox() const;
100    FloatRect calculateStrokeBoundingBox() const;
101    void updateRepaintBoundingBox();
102
103    bool setupNonScalingStrokeContext(AffineTransform&, GraphicsContextStateSaver&);
104
105    bool shouldGenerateMarkerPositions() const;
106    FloatRect markerRect(float strokeWidth) const;
107    void processMarkerPositions();
108
109    void fillShape(RenderStyle*, GraphicsContext*);
110    void strokeShape(RenderStyle*, GraphicsContext*);
111    void drawMarkers(PaintInfo&);
112
113private:
114    FloatRect m_repaintBoundingBox;
115    AffineTransform m_localTransform;
116    OwnPtr<Path> m_path;
117    Vector<MarkerPosition> m_markerPositions;
118
119    bool m_needsBoundariesUpdate : 1;
120    bool m_needsShapeUpdate : 1;
121    bool m_needsTransformUpdate : 1;
122};
123
124DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGShape, isSVGShape());
125
126}
127
128#endif
129