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
|
/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002, 2005, 2006, 2007, 2012 Apple Inc. 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 "core/css/CSSRule.h"
#include "bindings/core/v8/ScriptWrappableVisitor.h"
#include "core/css/CSSStyleSheet.h"
#include "core/css/StyleRule.h"
#include "core/css/StyleSheetContents.h"
namespace blink {
struct SameSizeAsCSSRule : public GarbageCollectedFinalized<SameSizeAsCSSRule>,
public ScriptWrappable {
virtual ~SameSizeAsCSSRule();
unsigned char bitfields;
void* pointerUnion;
};
static_assert(sizeof(CSSRule) == sizeof(SameSizeAsCSSRule),
"CSSRule should stay small");
const CSSParserContext* CSSRule::parserContext() const {
CSSStyleSheet* styleSheet = parentStyleSheet();
return styleSheet ? styleSheet->contents()->parserContext()
: strictCSSParserContext();
}
void CSSRule::setParentStyleSheet(CSSStyleSheet* styleSheet) {
m_parentIsRule = false;
m_parentStyleSheet = styleSheet;
ScriptWrappableVisitor::writeBarrier(this, m_parentStyleSheet);
}
void CSSRule::setParentRule(CSSRule* rule) {
m_parentIsRule = true;
m_parentRule = rule;
ScriptWrappableVisitor::writeBarrier(this, m_parentRule);
}
DEFINE_TRACE(CSSRule) {
// This makes the parent link strong, which is different from the
// pre-oilpan world, where the parent link is mysteriously zeroed under
// some circumstances.
if (m_parentIsRule)
visitor->trace(m_parentRule);
else
visitor->trace(m_parentStyleSheet);
}
} // namespace blink
|
