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1 /*
2  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
3  * Copyright (C) 2009 Google, Inc.
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Library General Public
7  * License as published by the Free Software Foundation; either
8  * version 2 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * Library General Public License for more details.
14  *
15  * You should have received a copy of the GNU Library General Public License
16  * along with this library; see the file COPYING.LIB.  If not, write to
17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18  * Boston, MA 02110-1301, USA.
19  */
20 
21 #ifndef RenderSVGGradientStop_h
22 #define RenderSVGGradientStop_h
23 
24 #if ENABLE(SVG)
25 #include "RenderObject.h"
26 
27 namespace WebCore {
28 
29 class SVGGradientElement;
30 class SVGStopElement;
31 
32 // This class exists mostly so we can hear about gradient stop style changes
33 class RenderSVGGradientStop : public RenderObject {
34 public:
35     RenderSVGGradientStop(SVGStopElement*);
36     virtual ~RenderSVGGradientStop();
37 
isSVGGradientStop()38     virtual bool isSVGGradientStop() const { return true; }
renderName()39     virtual const char* renderName() const { return "RenderSVGGradientStop"; }
40 
41     virtual void layout();
42 
43     // This overrides are needed to prevent ASSERTs on <svg><stop /></svg>
44     // RenderObject's default implementations ASSERT_NOT_REACHED()
45     // https://bugs.webkit.org/show_bug.cgi?id=20400
clippedOverflowRectForRepaint(RenderBoxModelObject *)46     virtual IntRect clippedOverflowRectForRepaint(RenderBoxModelObject*) { return IntRect(); }
objectBoundingBox()47     virtual FloatRect objectBoundingBox() const { return FloatRect(); }
strokeBoundingBox()48     virtual FloatRect strokeBoundingBox() const { return FloatRect(); }
repaintRectInLocalCoordinates()49     virtual FloatRect repaintRectInLocalCoordinates() const { return FloatRect(); }
50 
51 protected:
52     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
53 
54 private:
55     SVGGradientElement* gradientElement() const;
56 };
57 
toRenderSVGGradientStop(const RenderObject * object)58 inline const RenderSVGGradientStop* toRenderSVGGradientStop(const RenderObject* object)
59 {
60     ASSERT(!object || object->isSVGGradientStop());
61     return static_cast<const RenderSVGGradientStop*>(object);
62 }
63 
64 }
65 
66 #endif // ENABLE(SVG)
67 #endif // RenderSVGGradientStop_h
68