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#include "core/rendering/RenderObject.h"
25
26namespace WebCore {
27
28class SVGGradientElement;
29class SVGStopElement;
30
31// This class exists mostly so we can hear about gradient stop style changes
32class RenderSVGGradientStop FINAL : public RenderObject {
33public:
34    explicit RenderSVGGradientStop(SVGStopElement*);
35    virtual ~RenderSVGGradientStop();
36
37    virtual const char* renderName() const OVERRIDE { return "RenderSVGGradientStop"; }
38    virtual bool isSVGGradientStop() const OVERRIDE { return true; }
39    virtual bool isSVG() const OVERRIDE { return true; }
40
41    virtual void layout() OVERRIDE;
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
46    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject*) const OVERRIDE { return LayoutRect(); }
47    virtual FloatRect objectBoundingBox() const OVERRIDE { return FloatRect(); }
48    virtual FloatRect strokeBoundingBox() const OVERRIDE { return FloatRect(); }
49    virtual FloatRect paintInvalidationRectInLocalCoordinates() const OVERRIDE { return FloatRect(); }
50
51protected:
52    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
53
54private:
55    SVGGradientElement* gradientElement() const;
56};
57
58DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGGradientStop, isSVGGradientStop());
59
60}
61
62#endif // RenderSVGGradientStop_h
63