KHtml

RenderSVGGradientStop.cpp
1 /*
2  * This file is part of the WebKit project.
3  *
4  * Copyright (C) 2007 Eric Seidel <[email protected]>
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public License
17  * along with this library; see the file COPYING.LIB. If not, write to
18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19  * Boston, MA 02110-1301, USA.
20  *
21  */
22 
23 #include "wtf/Platform.h"
24 
25 #if ENABLE(SVG)
26 #include "RenderSVGGradientStop.h"
27 
28 #include "SVGGradientElement.h"
29 #include "SVGNames.h"
30 #include "SVGStopElement.h"
31 
32 namespace WebCore
33 {
34 
35 using namespace SVGNames;
36 
37 RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement *element)
38  : RenderObject(element)
39 {
40 }
41 
42 RenderSVGGradientStop::~RenderSVGGradientStop()
43 {
44 }
45 
46 void RenderSVGGradientStop::setStyle(RenderStyle *style)
47 {
48  RenderObject::setStyle(style);
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  if (SVGGradientElement *gradient = gradientElement()) {
53  if (SVGResource *resource = gradient->canvasResource()) {
54  resource->invalidate();
55  }
56  }
57 }
58 
59 void RenderSVGGradientStop::layout()
60 {
61  setNeedsLayout(false);
62 }
63 
64 SVGGradientElement *RenderSVGGradientStop::gradientElement() const
65 {
66  Node *parentNode = element()->parent();
67  if (parentNode->hasTagName(linearGradientTag) || parentNode->hasTagName(radialGradientTag)) {
68  return static_cast<SVGGradientElement *>(parentNode);
69  }
70  return nullptr;
71 }
72 
73 }
74 
75 #endif // ENABLE(SVG)
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