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/*
* (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 "third_party/blink/renderer/core/css/css_rule.h"
#include "third_party/blink/renderer/core/css/css_style_sheet.h"
#include "third_party/blink/renderer/core/css/style_rule.h"
#include "third_party/blink/renderer/core/css/style_sheet_contents.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable_visitor.h"
namespace blink {
struct SameSizeAsCSSRule : public GarbageCollectedFinalized<SameSizeAsCSSRule>,
public ScriptWrappable {
~SameSizeAsCSSRule() override;
unsigned char bitfields;
void* pointer_union;
};
static_assert(sizeof(CSSRule) == sizeof(SameSizeAsCSSRule),
"CSSRule should stay small");
const CSSParserContext* CSSRule::ParserContext(
SecureContextMode secure_context_mode) const {
CSSStyleSheet* style_sheet = parentStyleSheet();
return style_sheet ? style_sheet->Contents()->ParserContext()
: StrictCSSParserContext(secure_context_mode);
}
void CSSRule::SetParentStyleSheet(CSSStyleSheet* style_sheet) {
parent_is_rule_ = false;
parent_style_sheet_ = style_sheet;
ScriptWrappableMarkingVisitor::WriteBarrier(parent_style_sheet_);
MarkingVisitor::WriteBarrier(parent_style_sheet_);
}
void CSSRule::SetParentRule(CSSRule* rule) {
parent_is_rule_ = true;
parent_rule_ = rule;
ScriptWrappableMarkingVisitor::WriteBarrier(parent_rule_);
MarkingVisitor::WriteBarrier(parent_rule_);
}
void CSSRule::Trace(blink::Visitor* visitor) {
// 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 (parent_is_rule_)
visitor->TraceWithWrappers(parent_rule_);
else
visitor->TraceWithWrappers(parent_style_sheet_);
ScriptWrappable::Trace(visitor);
}
} // namespace blink
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