diff -r 000000000000 -r 4f2f89ce4247 WebCore/rendering/RenderSVGGradientStop.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderSVGGradientStop.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,70 @@
+/*
+ * This file is part of the WebKit project.
+ *
+ * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+
+#if ENABLE(SVG)
+#include "RenderSVGGradientStop.h"
+
+#include "SVGGradientElement.h"
+#include "SVGNames.h"
+#include "SVGStopElement.h"
+
+namespace WebCore {
+    
+using namespace SVGNames;
+
+RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement* element)
+    : RenderObject(element)
+{
+}
+
+RenderSVGGradientStop::~RenderSVGGradientStop()
+{
+}
+
+void RenderSVGGradientStop::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
+{
+    RenderObject::styleDidChange(diff, oldStyle);
+
+    // <stop> elements should only be allowed to make renderers under gradient elements
+    // but I can imagine a few cases we might not be catching, so let's not crash if our parent isn't a gradient.
+    if (SVGGradientElement* gradient = gradientElement())
+        gradient->invalidateResourceClients();
+}
+
+void RenderSVGGradientStop::layout()
+{
+    setNeedsLayout(false);
+}
+
+SVGGradientElement* RenderSVGGradientStop::gradientElement() const
+{
+    Node* parentNode = node()->parent();
+    if (parentNode->hasTagName(linearGradientTag) || parentNode->hasTagName(radialGradientTag))
+        return static_cast<SVGGradientElement*>(parentNode);
+    return 0;
+}
+
+}
+
+#endif // ENABLE(SVG)