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      1 /*
      2  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005 Rob Buis <buis (at) kde.org>
      4  * Copyright (C) 2005 Eric Seidel <eric (at) webkit.org>
      5  * Copyright (C) 2006 Apple Computer, Inc
      6  * Copyright (C) 2009 Google, Inc.
      7  * Copyright (C) 2011 Renata Hodovan <reni (at) 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 
     36 namespace WebCore {
     37 
     38 class FloatPoint;
     39 class GraphicsContextStateSaver;
     40 class PointerEventsHitRules;
     41 class SVGGraphicsElement;
     42 
     43 class RenderSVGShape : public RenderSVGModelObject {
     44 public:
     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 
     63 protected:
     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 
     79 private:
     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 
    113 private:
    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 
    124 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGShape, isSVGShape());
    125 
    126 }
    127 
    128 #endif
    129