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SVGResourceMarker.cpp

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00001 /*
00002  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
00003  *
00004  * Redistribution and use in source and binary forms, with or without
00005  * modification, are permitted provided that the following conditions
00006  * are met:
00007  * 1. Redistributions of source code must retain the above copyright
00008  *    notice, this list of conditions and the following disclaimer.
00009  * 2. Redistributions in binary form must reproduce the above copyright
00010  *    notice, this list of conditions and the following disclaimer in the
00011  *    documentation and/or other materials provided with the distribution.
00012  *
00013  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
00014  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00015  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
00016  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
00017  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00018  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00019  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00020  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
00021  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00022  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00023  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
00024  */
00025 
00026 #include "config.h"
00027 
00028 #if ENABLE(SVG)
00029 #include "SVGResourceMarker.h"
00030 
00031 #include "AffineTransform.h"
00032 #include "GraphicsContext.h"
00033 #include "RenderSVGViewportContainer.h"
00034 #include "TextStream.h"
00035 
00036 namespace WebCore {
00037 
00038 SVGResourceMarker::SVGResourceMarker()
00039     : SVGResource()
00040     , m_refX(0.0)
00041     , m_refY(0.0)
00042     , m_angle(-1) // just like using setAutoAngle()
00043     , m_marker(0)
00044     , m_useStrokeWidth(true)
00045 {
00046 }
00047 
00048 SVGResourceMarker::~SVGResourceMarker()
00049 {
00050 }
00051 
00052 void SVGResourceMarker::setMarker(RenderSVGViewportContainer* marker)
00053 {
00054     m_marker = marker;
00055 }
00056 
00057 void SVGResourceMarker::setRef(double refX, double refY)
00058 {
00059     m_refX = refX;
00060     m_refY = refY;
00061 }
00062 
00063 void SVGResourceMarker::draw(GraphicsContext* context, const FloatRect& rect, double x, double y, double strokeWidth, double angle)
00064 {
00065     if (!m_marker)
00066         return;
00067 
00068     static HashSet<SVGResourceMarker*> currentlyDrawingMarkers;
00069 
00070     // avoid drawing circular marker references
00071     if (currentlyDrawingMarkers.contains(this))
00072         return;
00073 
00074     currentlyDrawingMarkers.add(this);
00075 
00076     AffineTransform transform;
00077     transform.translate(x, y);
00078     transform.rotate(m_angle > -1 ? m_angle : angle);
00079 
00080     // refX and refY are given in coordinates relative to the viewport established by the marker, yet they affect
00081     // the translation performed on the viewport itself.
00082     AffineTransform viewportTransform;
00083     if (m_useStrokeWidth)
00084         viewportTransform.scale(strokeWidth, strokeWidth);
00085     viewportTransform *= m_marker->viewportTransform();
00086     double refX, refY;
00087     viewportTransform.map(m_refX, m_refY, &refX, &refY);
00088     transform.translate(-refX, -refY);
00089 
00090     if (m_useStrokeWidth)
00091         transform.scale(strokeWidth, strokeWidth);
00092 
00093     // FIXME: PaintInfo should be passed into this method instead of being created here
00094     // FIXME: bounding box fractions are lost
00095     RenderObject::PaintInfo info(context, enclosingIntRect(rect), PaintPhaseForeground, 0, 0, 0);
00096 
00097     context->save();
00098     context->concatCTM(transform);
00099     m_marker->setDrawsContents(true);
00100     m_marker->paint(info, 0, 0);
00101     m_marker->setDrawsContents(false);
00102     context->restore();
00103 
00104     m_cachedBounds = transform.mapRect(m_marker->absoluteClippedOverflowRect());
00105 
00106     currentlyDrawingMarkers.remove(this);
00107 }
00108 
00109 FloatRect SVGResourceMarker::cachedBounds() const
00110 {
00111     return m_cachedBounds;
00112 }
00113 
00114 TextStream& SVGResourceMarker::externalRepresentation(TextStream& ts) const
00115 {
00116     ts << "[type=MARKER]"
00117         << " [angle=";
00118 
00119     if (angle() == -1)
00120         ts << "auto" << "]";
00121     else
00122         ts << angle() << "]";
00123 
00124     ts << " [ref x=" << refX() << " y=" << refY() << "]";
00125     return ts;
00126 }
00127 
00128 SVGResourceMarker* getMarkerById(Document* document, const AtomicString& id)
00129 {
00130     SVGResource* resource = getResourceById(document, id);
00131     if (resource && resource->isMarker())
00132         return static_cast<SVGResourceMarker*>(resource);
00133 
00134     return 0;
00135 }
00136 
00137 } // namespace WebCore
00138 
00139 #endif

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