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SVGResourceMarker.cpp
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1/*
2 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27
28#if ENABLE(SVG)
29#include "SVGResourceMarker.h"
30
31#include "AffineTransform.h"
32#include "GraphicsContext.h"
33#include "RenderSVGViewportContainer.h"
34#include "TextStream.h"
35
36namespace WebCore {
37
38SVGResourceMarker::SVGResourceMarker()
39 : SVGResource()
40 , m_refX(0.0)
41 , m_refY(0.0)
42 , m_angle(-1) // just like using setAutoAngle()
43 , m_marker(0)
44 , m_useStrokeWidth(true)
45{
46}
47
48SVGResourceMarker::~SVGResourceMarker()
49{
50}
51
52void SVGResourceMarker::setMarker(RenderSVGViewportContainer* marker)
53{
54 m_marker = marker;
55}
56
57void SVGResourceMarker::setRef(double refX, double refY)
58{
59 m_refX = refX;
60 m_refY = refY;
61}
62
63void SVGResourceMarker::draw(GraphicsContext* context, const FloatRect& rect, double x, double y, double strokeWidth, double angle)
64{
65 if (!m_marker)
66 return;
67
68 static HashSet<SVGResourceMarker*> currentlyDrawingMarkers;
69
70 // avoid drawing circular marker references
71 if (currentlyDrawingMarkers.contains(this))
72 return;
73
74 currentlyDrawingMarkers.add(this);
75
76 AffineTransform transform;
77 transform.translate(x, y);
78 transform.rotate(m_angle > -1 ? m_angle : angle);
79
80 // refX and refY are given in coordinates relative to the viewport established by the marker, yet they affect
81 // the translation performed on the viewport itself.
82 AffineTransform viewportTransform;
83 if (m_useStrokeWidth)
84 viewportTransform.scale(strokeWidth, strokeWidth);
85 viewportTransform *= m_marker->viewportTransform();
86 double refX, refY;
87 viewportTransform.map(m_refX, m_refY, &refX, &refY);
88 transform.translate(-refX, -refY);
89
90 if (m_useStrokeWidth)
91 transform.scale(strokeWidth, strokeWidth);
92
93 // FIXME: PaintInfo should be passed into this method instead of being created here
94 // FIXME: bounding box fractions are lost
95 RenderObject::PaintInfo info(context, enclosingIntRect(rect), PaintPhaseForeground, 0, 0, 0);
96
97 context->save();
98 context->concatCTM(transform);
99 m_marker->setDrawsContents(true);
100 m_marker->paint(info, 0, 0);
101 m_marker->setDrawsContents(false);
102 context->restore();
103
104 m_cachedBounds = transform.mapRect(m_marker->absoluteClippedOverflowRect());
105
106 currentlyDrawingMarkers.remove(this);
107}
108
109FloatRect SVGResourceMarker::cachedBounds() const
110{
111 return m_cachedBounds;
112}
113
114TextStream& SVGResourceMarker::externalRepresentation(TextStream& ts) const
115{
116 ts << "[type=MARKER]"
117 << " [angle=";
118
119 if (angle() == -1)
120 ts << "auto" << "]";
121 else
122 ts << angle() << "]";
123
124 ts << " [ref x=" << refX() << " y=" << refY() << "]";
125 return ts;
126}
127
128SVGResourceMarker* getMarkerById(Document* document, const AtomicString& id)
129{
130 SVGResource* resource = getResourceById(document, id);
131 if (resource && resource->isMarker())
132 return static_cast<SVGResourceMarker*>(resource);
133
134 return 0;
135}
136
137} // namespace WebCore
138
139#endif
AffineTransform.h
SVGResourceMarker.h
WebCore
Definition: CSSHelper.h:7
WebCore::enclosingIntRect
IntRect enclosingIntRect(const FloatRect &rect)
Definition: FloatRect.cpp:112
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