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1 /*
2  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public License
15  * along with this library; see the file COPYING.LIB.  If not, write to
16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  */
19 
20 #ifndef SVGMarkerLayoutInfo_h
21 #define SVGMarkerLayoutInfo_h
22 
23 #if ENABLE(SVG)
24 #include "AffineTransform.h"
25 #include "RenderObject.h"
26 #include "SVGMarkerData.h"
27 #include <wtf/Noncopyable.h>
28 
29 namespace WebCore {
30 
31 class Path;
32 class RenderSVGResourceMarker;
33 
34 struct MarkerLayout {
35     MarkerLayout(RenderSVGResourceMarker* markerObj = 0, AffineTransform matrixObj = AffineTransform())
markerMarkerLayout36         : marker(markerObj)
37         , matrix(matrixObj)
38     {
39         ASSERT(marker);
40     }
41 
42     RenderSVGResourceMarker* marker;
43     AffineTransform matrix;
44 };
45 
46 class SVGMarkerLayoutInfo {
47     WTF_MAKE_NONCOPYABLE(SVGMarkerLayoutInfo);
48 public:
49     SVGMarkerLayoutInfo();
50     ~SVGMarkerLayoutInfo();
51 
52     FloatRect calculateBoundaries(RenderSVGResourceMarker* startMarker, RenderSVGResourceMarker* midMarker, RenderSVGResourceMarker* endMarker, float strokeWidth, const Path&);
53     void drawMarkers(PaintInfo&);
54 
55     // Used by static inline helper functions in SVGMarkerLayoutInfo.cpp
markerData()56     SVGMarkerData& markerData() { return m_markerData; }
midMarker()57     RenderSVGResourceMarker* midMarker() const { return m_midMarker; }
elementIndex()58     int& elementIndex() { return m_elementIndex; }
59     void addLayoutedMarker(RenderSVGResourceMarker*, const FloatPoint& origin, float angle);
60     void clear();
61 
62 private:
63     RenderSVGResourceMarker* m_midMarker;
64 
65     // Used while layouting markers
66     int m_elementIndex;
67     SVGMarkerData m_markerData;
68     float m_strokeWidth;
69 
70     // Holds the final computed result
71     Vector<MarkerLayout> m_layout;
72 };
73 
74 }
75 
76 #endif
77 #endif
78