1/*
2 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#include "config.h"
21
22#if ENABLE(SVG)
23#include "RenderSVGGradientStop.h"
24
25#include "RenderSVGResourceContainer.h"
26#include "SVGGradientElement.h"
27#include "SVGNames.h"
28#include "SVGResourcesCache.h"
29#include "SVGStopElement.h"
30
31namespace WebCore {
32
33using namespace SVGNames;
34
35RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement* element)
36    : RenderObject(element)
37{
38}
39
40RenderSVGGradientStop::~RenderSVGGradientStop()
41{
42}
43
44void RenderSVGGradientStop::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
45{
46    RenderObject::styleDidChange(diff, oldStyle);
47    if (diff == StyleDifferenceEqual)
48        return;
49
50    // <stop> elements should only be allowed to make renderers under gradient elements
51    // but I can imagine a few cases we might not be catching, so let's not crash if our parent isn't a gradient.
52    SVGGradientElement* gradient = gradientElement();
53    if (!gradient)
54        return;
55
56    RenderObject* renderer = gradient->renderer();
57    if (!renderer)
58        return;
59
60    ASSERT(renderer->isSVGResourceContainer());
61    RenderSVGResourceContainer* container = renderer->toRenderSVGResourceContainer();
62    container->removeAllClientsFromCache();
63}
64
65void RenderSVGGradientStop::layout()
66{
67    setNeedsLayout(false);
68}
69
70SVGGradientElement* RenderSVGGradientStop::gradientElement() const
71{
72    ContainerNode* parentNode = node()->parentNode();
73    if (parentNode->hasTagName(linearGradientTag) || parentNode->hasTagName(radialGradientTag))
74        return static_cast<SVGGradientElement*>(parentNode);
75    return 0;
76}
77
78}
79
80#endif // ENABLE(SVG)
81