khtml/rendering/RenderSVGGradientStop.cpp

   1 /*
   2  * This file is part of the WebKit project.
   3  *
   4  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public License
  17  * along with this library; see the file COPYING.LIB.  If not, write to
  18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #include "config.h"
  24 #include "wtf/Platform.h"
  25
  26 #if ENABLE(SVG)
  27 #include "RenderSVGGradientStop.h"
  28
  29 #include "SVGGradientElement.h"
  30 #include "SVGNames.h"
  31 #include "SVGStopElement.h"
  32
  33 namespace WebCore {
  34
  35 using namespace SVGNames;
  36
  37 RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement* element)
  38     : RenderObject(element)
  39 {
  40 }
  41
  42 RenderSVGGradientStop::~RenderSVGGradientStop()
  43 {
  44 }
  45
  46 void RenderSVGGradientStop::setStyle(RenderStyle* style)
  47 {
  48     RenderObject::setStyle(style);
  49
  50     // <stop> elements should only be allowed to make renderers under gradient elements
  51     // but I can imagine a few cases we might not be catching, so let's not crash if our parent isn't a gradient.
  52     if (SVGGradientElement* gradient = gradientElement()) {
  53         if (SVGResource* resource = gradient->canvasResource())
  54             resource->invalidate();
  55     }
  56 }
  57
  58 void RenderSVGGradientStop::layout()
  59 {
  60     setNeedsLayout(false);
  61 }
  62
  63 SVGGradientElement* RenderSVGGradientStop::gradientElement() const
  64 {
  65     Node* parentNode = element()->parent();
  66     if (parentNode->hasTagName(linearGradientTag) || parentNode->hasTagName(radialGradientTag))
  67         return static_cast<SVGGradientElement*>(parentNode);
  68     return 0;
  69 }
  70
  71 }
  72
  73 #endif // ENABLE(SVG)