1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/*
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#if ENABLE(SVG)
#include "RenderSVGResourceContainer.h"
#include "RenderSVGShadowTreeRootContainer.h"
#include "SVGStyledTransformableElement.h"
namespace WebCore {
RenderSVGResourceContainer::RenderSVGResourceContainer(SVGStyledElement* node)
: RenderSVGHiddenContainer(node)
, RenderSVGResource()
, m_id(node->hasID() ? node->getIdAttribute() : nullAtom)
{
ASSERT(node->document());
node->document()->accessSVGExtensions()->addResource(m_id, this);
}
RenderSVGResourceContainer::~RenderSVGResourceContainer()
{
ASSERT(node());
ASSERT(node()->document());
node()->document()->accessSVGExtensions()->removeResource(m_id);
}
void RenderSVGResourceContainer::idChanged()
{
ASSERT(node());
ASSERT(node()->document());
SVGDocumentExtensions* extensions = node()->document()->accessSVGExtensions();
// Remove old id, that is guaranteed to be present in cache
extensions->removeResource(m_id);
m_id = static_cast<Element*>(node())->getIdAttribute();
// It's possible that an element is referencing us with the new id, and has to be notified that we're existing now
if (extensions->isPendingResource(m_id)) {
OwnPtr<HashSet<SVGStyledElement*> > clients(extensions->removePendingResource(m_id));
if (clients->isEmpty())
return;
HashSet<SVGStyledElement*>::const_iterator it = clients->begin();
const HashSet<SVGStyledElement*>::const_iterator end = clients->end();
for (; it != end; ++it) {
if (RenderObject* renderer = (*it)->renderer())
renderer->setNeedsLayout(true);
}
}
// Recache us with the new id
extensions->addResource(m_id, this);
}
AffineTransform RenderSVGResourceContainer::transformOnNonScalingStroke(RenderObject* object, const AffineTransform& resourceTransform)
{
if (!object->isRenderPath())
return resourceTransform;
SVGStyledTransformableElement* element = static_cast<SVGStyledTransformableElement*>(object->node());
AffineTransform transform = resourceTransform;
transform.multiply(element->getScreenCTM());
return transform;
}
bool RenderSVGResourceContainer::containsCyclicReference(const Node* startNode) const
{
ASSERT(startNode->document());
for (Node* node = startNode->firstChild(); node; node = node->nextSibling()) {
if (!node->isSVGElement())
continue;
RenderObject* renderer = node->renderer();
if (!renderer)
continue;
RenderStyle* style = renderer->style();
if (!style)
continue;
const SVGRenderStyle* svgStyle = style->svgStyle();
ASSERT(svgStyle);
// Let the class inheriting from us decide whether the child element references ourselves.
if (childElementReferencesResource(svgStyle, m_id))
return true;
// Dive into shadow tree to check for cycles there.
if (node->hasTagName(SVGNames::useTag)) {
ASSERT(renderer->isSVGShadowTreeRootContainer());
if (Node* shadowRoot = static_cast<RenderSVGShadowTreeRootContainer*>(renderer)->rootElement()) {
if (containsCyclicReference(shadowRoot))
return true;
}
}
if (node->hasChildNodes()) {
if (containsCyclicReference(node))
return true;
}
}
return false;
}
}
#endif
|
