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      1 /*
      2  * Copyright (C) 2007 Eric Seidel <eric (at) webkit.org>
      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 #include "config.h"
     21 
     22 #include "core/rendering/svg/RenderSVGGradientStop.h"
     23 
     24 #include "core/rendering/svg/RenderSVGResourceContainer.h"
     25 #include "core/svg/SVGGradientElement.h"
     26 #include "core/svg/SVGStopElement.h"
     27 
     28 namespace blink {
     29 
     30 RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement* element)
     31     : RenderObject(element)
     32 {
     33 }
     34 
     35 RenderSVGGradientStop::~RenderSVGGradientStop()
     36 {
     37 }
     38 
     39 void RenderSVGGradientStop::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
     40 {
     41     RenderObject::styleDidChange(diff, oldStyle);
     42     if (!diff.hasDifference())
     43         return;
     44 
     45     // <stop> elements should only be allowed to make renderers under gradient elements
     46     // but I can imagine a few cases we might not be catching, so let's not crash if our parent isn't a gradient.
     47     SVGGradientElement* gradient = gradientElement();
     48     if (!gradient)
     49         return;
     50 
     51     RenderObject* renderer = gradient->renderer();
     52     if (!renderer)
     53         return;
     54 
     55     RenderSVGResourceContainer* container = toRenderSVGResourceContainer(renderer);
     56     container->removeAllClientsFromCache();
     57 }
     58 
     59 void RenderSVGGradientStop::layout()
     60 {
     61     clearNeedsLayout();
     62 }
     63 
     64 SVGGradientElement* RenderSVGGradientStop::gradientElement() const
     65 {
     66     ContainerNode* parentNode = node()->parentNode();
     67     ASSERT(parentNode);
     68     return isSVGGradientElement(*parentNode) ? toSVGGradientElement(parentNode) : 0;
     69 }
     70 
     71 }
     72