1 /* 2 * This file is part of the WebKit project. 3 * 4 * Copyright (C) 2007 Eric Seidel <eric (at) 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 25 #if ENABLE(SVG) 26 #include "RenderSVGGradientStop.h" 27 28 #include "SVGGradientElement.h" 29 #include "SVGNames.h" 30 #include "SVGStopElement.h" 31 32 namespace WebCore { 33 34 using namespace SVGNames; 35 36 RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement* element) 37 : RenderObject(element) 38 { 39 } 40 41 RenderSVGGradientStop::~RenderSVGGradientStop() 42 { 43 } 44 45 void RenderSVGGradientStop::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 46 { 47 RenderObject::styleDidChange(diff, oldStyle); 48 49 // <stop> elements should only be allowed to make renderers under gradient elements 50 // but I can imagine a few cases we might not be catching, so let's not crash if our parent isn't a gradient. 51 if (SVGGradientElement* gradient = gradientElement()) { 52 if (SVGResource* resource = gradient->canvasResource(this)) 53 resource->invalidate(); 54 } 55 } 56 57 void RenderSVGGradientStop::layout() 58 { 59 setNeedsLayout(false); 60 } 61 62 SVGGradientElement* RenderSVGGradientStop::gradientElement() const 63 { 64 Node* parentNode = node()->parent(); 65 if (parentNode->hasTagName(linearGradientTag) || parentNode->hasTagName(radialGradientTag)) 66 return static_cast<SVGGradientElement*>(parentNode); 67 return 0; 68 } 69 70 } 71 72 #endif // ENABLE(SVG) 73