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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2003-2019 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.
*
*/
#pragma once
#include "PropertyAllowlist.h"
#include "SelectorFilter.h"
#include "StyleRule.h"
#include <wtf/CompactRefPtrTuple.h>
namespace WebCore {
namespace Style {
enum class MatchBasedOnRuleHash : unsigned {
None,
Universal,
ClassA,
ClassB,
ClassC
};
enum class IsStartingStyle : bool { No, Yes };
class RuleData {
public:
static const unsigned maximumSelectorComponentCount = 8192;
RuleData(const StyleRule&, unsigned selectorIndex, unsigned selectorListIndex, unsigned position, IsStartingStyle);
unsigned position() const { return m_position; }
const StyleRule& styleRule() const { return *m_styleRuleWithSelectorIndex.pointer(); }
const CSSSelector* selector() const
{
return styleRule().selectorList().selectorAt(selectorIndex());
}
#if ENABLE(CSS_SELECTOR_JIT)
CompiledSelector& compiledSelector() const { return styleRule().compiledSelectorForListIndex(m_selectorListIndex); }
#endif
unsigned selectorIndex() const { return m_styleRuleWithSelectorIndex.type(); }
unsigned selectorListIndex() const { return m_selectorListIndex; }
bool canMatchPseudoElement() const { return m_canMatchPseudoElement; }
MatchBasedOnRuleHash matchBasedOnRuleHash() const { return static_cast<MatchBasedOnRuleHash>(m_matchBasedOnRuleHash); }
unsigned linkMatchType() const { return m_linkMatchType; }
PropertyAllowlist propertyAllowlist() const { return static_cast<PropertyAllowlist>(m_propertyAllowlist); }
IsStartingStyle isStartingStyle() const { return static_cast<IsStartingStyle>(m_isStartingStyle); }
bool isEnabled() const { return m_isEnabled; }
void setEnabled(bool value) { m_isEnabled = value; }
const SelectorFilter::Hashes& descendantSelectorIdentifierHashes() const { return m_descendantSelectorIdentifierHashes; }
void disableSelectorFiltering() { m_descendantSelectorIdentifierHashes[0] = 0; }
private:
// Keep in sync with RuleFeature's selectorIndex and selectorListIndex size.
CompactRefPtrTuple<const StyleRule, uint16_t> m_styleRuleWithSelectorIndex;
unsigned m_selectorListIndex : 16;
// If we have more rules than 2^bitcount here we'll get confused about rule order.
unsigned m_position : 21;
unsigned m_matchBasedOnRuleHash : 3;
unsigned m_canMatchPseudoElement : 1;
unsigned m_linkMatchType : 2; // SelectorChecker::LinkMatchMask
unsigned m_propertyAllowlist : 2;
unsigned m_isStartingStyle : 1;
unsigned m_isEnabled : 1;
SelectorFilter::Hashes m_descendantSelectorIdentifierHashes;
};
} // namespace Style
} // namespace WebCore
namespace WTF {
// RuleData is simple enough that initializing to 0 and moving with memcpy will totally work.
template<> struct VectorTraits<WebCore::Style::RuleData> : SimpleClassVectorTraits { };
} // namespace WTF
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