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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002-2021 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 "config.h"
#include "CSSRule.h"
#include "CSSScopeRule.h"
#include "CSSStyleRule.h"
#include "CSSStyleSheet.h"
#include "StyleRule.h"
#include "StyleSheetContents.h"
#include "css/parser/CSSParserEnum.h"
namespace WebCore {
struct SameSizeAsCSSRule : public RefCounted<SameSizeAsCSSRule> {
virtual ~SameSizeAsCSSRule();
unsigned char bitfields;
void* pointerUnion;
};
static_assert(sizeof(CSSRule) == sizeof(SameSizeAsCSSRule), "CSSRule should stay small");
unsigned short CSSRule::typeForCSSOM() const
{
// "This enumeration is thus frozen in its current state, and no new new values will be
// added to reflect additional at-rules; all at-rules beyond the ones listed above will return 0."
// https://drafts.csswg.org/cssom/#the-cssrule-interface
if (styleRuleType() >= firstUnexposedStyleRuleType)
return 0;
return enumToUnderlyingType(styleRuleType());
}
ExceptionOr<void> CSSRule::setCssText(const String&)
{
return { };
}
const CSSParserContext& CSSRule::parserContext() const
{
RefPtr styleSheet = parentStyleSheet();
return styleSheet ? styleSheet->contents().parserContext() : strictCSSParserContext();
}
bool CSSRule::hasStyleRuleAncestor() const
{
auto current = this->parentRule();
while (current) {
if (current->styleRuleType() == StyleRuleType::Style)
return true;
current = current->parentRule();
}
return false;
}
CSSParserEnum::NestedContext CSSRule::nestedContext() const
{
for (RefPtr parentRule = this->parentRule(); parentRule; parentRule = parentRule->parentRule()) {
if (is<CSSStyleRule>(*parentRule))
return CSSParserEnum::NestedContextType::Style;
if (is<CSSScopeRule>(*parentRule))
return CSSParserEnum::NestedContextType::Scope;
}
return { };
}
RefPtr<StyleRuleWithNesting> CSSRule::prepareChildStyleRuleForNesting(StyleRule&)
{
return nullptr;
}
} // namespace WebCore
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