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#include "RenderSVGGradientStop.h"
22
23#include "RenderSVGResourceContainer.h"
24#include "SVGGradientElement.h"
25#include "SVGNames.h"
26#include "SVGResourcesCache.h"
27#include "SVGStopElement.h"
28#include <wtf/IsoMallocInlines.h>
29#include <wtf/StackStats.h>
30
31namespace WebCore {
32
33using namespace SVGNames;
34
35WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSVGGradientStop);
36
37RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement& element, RenderStyle&& style)
38 : RenderElement(element, WTFMove(style), 0)
39{
40}
41
42RenderSVGGradientStop::~RenderSVGGradientStop() = default;
43
44void RenderSVGGradientStop::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
45{
46 RenderElement::styleDidChange(diff, oldStyle);
47 if (diff == StyleDifference::Equal)
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 const auto* gradient = gradientElement();
53 if (!gradient)
54 return;
55
56 RenderElement* renderer = gradient->renderer();
57 if (!renderer)
58 return;
59
60 downcast<RenderSVGResourceContainer>(*renderer).removeAllClientsFromCache();
61}
62
63void RenderSVGGradientStop::layout()
64{
65 StackStats::LayoutCheckPoint layoutCheckPoint;
66 clearNeedsLayout();
67}
68
69SVGGradientElement* RenderSVGGradientStop::gradientElement()
70{
71 if (is<SVGGradientElement>(element().parentElement()))
72 return downcast<SVGGradientElement>(element().parentElement());
73 return nullptr;
74}
75
76}
77