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#include "core/rendering/svg/RenderSVGGradientStop.h"
23
24#include "core/rendering/svg/RenderSVGResourceContainer.h"
25#include "core/svg/SVGGradientElement.h"
26#include "core/svg/SVGStopElement.h"
27
28namespace blink {
29
30RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement* element)
31    : RenderObject(element)
32{
33}
34
35RenderSVGGradientStop::~RenderSVGGradientStop()
36{
37}
38
39void RenderSVGGradientStop::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
40{
41    RenderObject::styleDidChange(diff, oldStyle);
42    if (!diff.hasDifference())
43        return;
44
45    // <stop> elements should only be allowed to make renderers under gradient elements
46    // but I can imagine a few cases we might not be catching, so let's not crash if our parent isn't a gradient.
47    SVGGradientElement* gradient = gradientElement();
48    if (!gradient)
49        return;
50
51    RenderObject* renderer = gradient->renderer();
52    if (!renderer)
53        return;
54
55    RenderSVGResourceContainer* container = toRenderSVGResourceContainer(renderer);
56    container->removeAllClientsFromCache();
57}
58
59void RenderSVGGradientStop::layout()
60{
61    clearNeedsLayout();
62}
63
64SVGGradientElement* RenderSVGGradientStop::gradientElement() const
65{
66    ContainerNode* parentNode = node()->parentNode();
67    ASSERT(parentNode);
68    return isSVGGradientElement(*parentNode) ? toSVGGradientElement(parentNode) : 0;
69}
70
71}
72