src/rendering/RenderSVGGradientStop.cpp

0001 /*
0002  * This file is part of the WebKit project.
0003  *
0004  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
0005  *
0006  * This library is free software; you can redistribute it and/or
0007  * modify it under the terms of the GNU Library General Public
0008  * License as published by the Free Software Foundation; either
0009  * version 2 of the License, or (at your option) any later version.
0010  *
0011  * This library is distributed in the hope that it will be useful,
0012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
0013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0014  * Library General Public License for more details.
0015  *
0016  * You should have received a copy of the GNU Library General Public License
0017  * along with this library; see the file COPYING.LIB.  If not, write to
0018  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0019  * Boston, MA 02110-1301, USA.
0020  *
0021  */
0022
0023 #include "wtf/Platform.h"
0024
0025 #if ENABLE(SVG)
0026 #include "RenderSVGGradientStop.h"
0027
0028 #include "SVGGradientElement.h"
0029 #include "SVGNames.h"
0030 #include "SVGStopElement.h"
0031
0032 namespace WebCore
0033 {
0034
0035 using namespace SVGNames;
0036
0037 RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement *element)
0038     : RenderObject(element)
0039 {
0040 }
0041
0042 RenderSVGGradientStop::~RenderSVGGradientStop()
0043 {
0044 }
0045
0046 void RenderSVGGradientStop::setStyle(RenderStyle *style)
0047 {
0048     RenderObject::setStyle(style);
0049
0050     // <stop> elements should only be allowed to make renderers under gradient elements
0051     // but I can imagine a few cases we might not be catching, so let's not crash if our parent isn't a gradient.
0052     if (SVGGradientElement *gradient = gradientElement()) {
0053         if (SVGResource *resource = gradient->canvasResource()) {
0054             resource->invalidate();
0055         }
0056     }
0057 }
0058
0059 void RenderSVGGradientStop::layout()
0060 {
0061     setNeedsLayout(false);
0062 }
0063
0064 SVGGradientElement *RenderSVGGradientStop::gradientElement() const
0065 {
0066     Node *parentNode = element()->parent();
0067     if (parentNode->hasTagName(linearGradientTag) || parentNode->hasTagName(radialGradientTag)) {
0068         return static_cast<SVGGradientElement *>(parentNode);
0069     }
0070     return nullptr;
0071 }
0072
0073 }
0074
0075 #endif // ENABLE(SVG)