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/*
* Copyright (C) 2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ContainerQuery.h"
#include "SelectorMatchingState.h"
#include "StyleScopeOrdinal.h"
#include <wtf/Ref.h>
namespace WebCore {
class Element;
namespace Style {
enum class EvaluationResult : uint8_t { False, True, Unknown };
class ContainerQueryEvaluator {
public:
enum class SelectionMode : bool { Element, PseudoElement };
ContainerQueryEvaluator(const Element&, SelectionMode, ScopeOrdinal, SelectorMatchingState*);
bool evaluate(const CQ::ContainerQuery&) const;
static const Element* selectContainer(OptionSet<CQ::Axis>, const String& name, const Element&, SelectionMode = SelectionMode::Element, ScopeOrdinal = ScopeOrdinal::Element, const CachedQueryContainers* = nullptr);
private:
struct SelectedContainer;
std::optional<SelectedContainer> selectContainer(const CQ::ContainerQuery&) const;
EvaluationResult evaluateQueryInParens(const CQ::QueryInParens&, const SelectedContainer&) const;
template<typename ConditionType> EvaluationResult evaluateCondition(const ConditionType&, const SelectedContainer&) const;
EvaluationResult evaluateSizeFeature(const CQ::SizeFeature&, const SelectedContainer&) const;
const Ref<const Element> m_element;
const SelectionMode m_selectionMode;
const ScopeOrdinal m_scopeOrdinal;
SelectorMatchingState* m_selectorMatchingState;
};
inline EvaluationResult toEvaluationResult(bool boolean)
{
return boolean ? EvaluationResult::True : EvaluationResult::False;
};
inline EvaluationResult operator&(EvaluationResult left, EvaluationResult right)
{
if (left == EvaluationResult::Unknown || right == EvaluationResult::Unknown)
return EvaluationResult::Unknown;
if (left == EvaluationResult::True && right == EvaluationResult::True)
return EvaluationResult::True;
return EvaluationResult::False;
}
inline EvaluationResult operator!(EvaluationResult result)
{
switch (result) {
case EvaluationResult::True:
return EvaluationResult::False;
case EvaluationResult::False:
return EvaluationResult::True;
case EvaluationResult::Unknown:
return EvaluationResult::Unknown;
}
RELEASE_ASSERT_NOT_REACHED();
}
}
}
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