File indexing completed on 2024-05-12 11:51:56

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #if ENABLE(SVG)
 #include "SVGResourceMarker.h"
 
 #include "AffineTransform.h"
 #include "GraphicsContext.h"
 #include "RenderSVGViewportContainer.h"
 #include "TextStream.h"
 
 namespace WebCore
 {
 
 SVGResourceMarker::SVGResourceMarker()
     : SVGResource()
     , m_refX(0.0)
     , m_refY(0.0)
     , m_angle(-1) // just like using setAutoAngle()
     , m_marker(0)
     , m_useStrokeWidth(true)
 {
 }
 
 SVGResourceMarker::~SVGResourceMarker()
 {
 }
 
 void SVGResourceMarker::setMarker(RenderSVGViewportContainer *marker)
 {
     m_marker = marker;
 }
 
 void SVGResourceMarker::setRef(double refX, double refY)
 {
     m_refX = refX;
     m_refY = refY;
 }
 
 void SVGResourceMarker::draw(GraphicsContext *context, const FloatRect &rect, double x, double y, double strokeWidth, double angle)
 {
     if (!m_marker) {
         return;
     }
 
     static HashSet<SVGResourceMarker *> currentlyDrawingMarkers;
 
     // avoid drawing circular marker references
     if (currentlyDrawingMarkers.contains(this)) {
         return;
     }
 
     currentlyDrawingMarkers.add(this);
 
     AffineTransform transform;
     transform.translate(x, y);
     transform.rotate(m_angle > -1 ? m_angle : angle);
 
     // refX and refY are given in coordinates relative to the viewport established by the marker, yet they affect
     // the translation performed on the viewport itself.
     AffineTransform viewportTransform;
     if (m_useStrokeWidth) {
         viewportTransform.scale(strokeWidth, strokeWidth);
     }
     viewportTransform *= m_marker->viewportTransform();
     double refX, refY;
     viewportTransform.map(m_refX, m_refY, &refX, &refY);
     transform.translate(-refX, -refY);
 
     if (m_useStrokeWidth) {
         transform.scale(strokeWidth, strokeWidth);
     }
 
     // FIXME: PaintInfo should be passed into this method instead of being created here
     // FIXME: bounding box fractions are lost
     RenderObject::PaintInfo info(context, enclosingIntRect(rect), PaintPhaseForeground, 0, 0, 0);
 
     context->save();
     context->concatCTM(transform);
     m_marker->setDrawsContents(true);
     m_marker->paint(info, 0, 0);
     m_marker->setDrawsContents(false);
     context->restore();
 
     m_cachedBounds = transform.mapRect(m_marker->absoluteClippedOverflowRect());
 
     currentlyDrawingMarkers.remove(this);
 }
 
 FloatRect SVGResourceMarker::cachedBounds() const
 {
     return m_cachedBounds;
 }
 
 TextStream &SVGResourceMarker::externalRepresentation(TextStream &ts) const
 {
     ts << "[type=MARKER]"
        << " [angle=";
 
     if (angle() == -1) {
         ts << "auto" << "]";
     } else {
         ts << angle() << "]";
     }
 
     ts << " [ref x=" << refX() << " y=" << refY() << "]";
     return ts;
 }
 
 SVGResourceMarker *getMarkerById(Document *document, const AtomicString &id)
 {
     SVGResource *resource = getResourceById(document, id);
     if (resource && resource->isMarker()) {
         return static_cast<SVGResourceMarker *>(resource);
     }
 
     return 0;
 }
 
 } // namespace WebCore
 
 #endif