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GenericMediaQueryTypes.h
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131 lines (104 loc) · 4.09 KB
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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. ``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
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* 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 "CSSToLengthConversionData.h"
#include "CSSValue.h"
#include "CSSValueKeywords.h"
#include <wtf/CheckedPtr.h>
#include <wtf/OptionSet.h>
#include <wtf/text/AtomString.h>
namespace WebCore {
class RenderElement;
namespace MQ {
enum class LogicalOperator : uint8_t { And, Or, Not };
enum class ComparisonOperator : uint8_t { LessThan, LessThanOrEqual, Equal, GreaterThan, GreaterThanOrEqual };
enum class Syntax : uint8_t { Boolean, Plain, Range };
struct Condition;
struct FeatureSchema;
struct Comparison {
ComparisonOperator op;
RefPtr<CSSValue> value;
};
struct Feature {
AtomString name;
Syntax syntax;
std::optional<Comparison> leftComparison;
std::optional<Comparison> rightComparison;
std::optional<CSSValueID> functionId { };
const FeatureSchema* schema { nullptr };
};
struct GeneralEnclosed {
String name;
String text;
};
using QueryInParens = std::variant<Condition, Feature, GeneralEnclosed>;
struct Condition {
LogicalOperator logicalOperator { LogicalOperator::And };
Vector<QueryInParens> queries;
std::optional<CSSValueID> functionId { };
};
enum class EvaluationResult : uint8_t { False, True, Unknown };
struct FeatureEvaluationContext {
WeakRef<const Document, WeakPtrImplWithEventTargetData> document;
CSSToLengthConversionData conversionData { };
CheckedPtr<const RenderElement> renderer { };
};
struct FeatureSchema {
WTF_MAKE_STRUCT_FAST_ALLOCATED;
enum class Type : uint8_t { Discrete, Range };
enum class ValueType : uint8_t { Integer, Number, Length, Ratio, Resolution, Identifier, CustomProperty };
AtomString name;
Type type;
ValueType valueType;
FixedVector<CSSValueID> valueIdentifiers;
virtual EvaluationResult evaluate(const Feature&, const FeatureEvaluationContext&) const { return EvaluationResult::Unknown; }
FeatureSchema(const AtomString& name, Type type, ValueType valueType, FixedVector<CSSValueID>&& valueIdentifiers = { })
: name(name)
, type(type)
, valueType(valueType)
, valueIdentifiers(WTFMove(valueIdentifiers))
{ }
virtual ~FeatureSchema() = default;
};
template<typename TraverseFunction> void traverseFeatures(const Condition&, TraverseFunction&&);
template<typename TraverseFunction>
void traverseFeatures(const QueryInParens& queryInParens, TraverseFunction&& function)
{
return WTF::switchOn(queryInParens, [&](const Condition& condition) {
traverseFeatures(condition, function);
}, [&](const MQ::Feature& feature) {
function(feature);
}, [&](const MQ::GeneralEnclosed&) {
MQ::Feature dummy { };
function(dummy);
});
}
template<typename TraverseFunction>
void traverseFeatures(const Condition& condition, TraverseFunction&& function)
{
for (auto& queryInParens : condition.queries)
traverseFeatures(queryInParens, function);
}
}
}