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/*
* Copyright (C) 2019 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 "CascadeLevel.h"
#include "MatchResult.h"
#include <bitset>
namespace WebCore {
class StyleResolver;
namespace Style {
class PropertyCascade {
WTF_MAKE_FAST_ALLOCATED;
public:
enum IncludedProperties { All, InheritedOnly };
struct Direction {
TextDirection textDirection;
WritingMode writingMode;
};
PropertyCascade(const MatchResult&, CascadeLevel, IncludedProperties, Direction);
PropertyCascade(const PropertyCascade&, CascadeLevel, std::optional<CascadeLayerPriority> maximumCascadeLayerPriorityForRollback = { });
~PropertyCascade();
struct Property {
CSSPropertyID id;
CascadeLevel cascadeLevel;
ScopeOrdinal styleScopeOrdinal;
CascadeLayerPriority cascadeLayerPriority;
FromStyleAttribute fromStyleAttribute;
CSSValue* cssValue[3]; // Values for link match states MatchDefault, MatchLink and MatchVisited
};
bool hasProperty(CSSPropertyID) const;
const Property& property(CSSPropertyID) const;
bool hasCustomProperty(const String&) const;
Property customProperty(const String&) const;
const Vector<Property, 8>& deferredProperties() const { return m_deferredProperties; }
const HashMap<AtomString, Property>& customProperties() const { return m_customProperties; }
Direction direction() const;
private:
void buildCascade();
bool addNormalMatches(CascadeLevel);
void addImportantMatches(CascadeLevel);
bool addMatch(const MatchedProperties&, CascadeLevel, bool important);
void set(CSSPropertyID, CSSValue&, const MatchedProperties&, CascadeLevel);
void setDeferred(CSSPropertyID, CSSValue&, const MatchedProperties&, CascadeLevel);
static void setPropertyInternal(Property&, CSSPropertyID, CSSValue&, const MatchedProperties&, CascadeLevel);
Direction resolveDirectionAndWritingMode(Direction inheritedDirection) const;
const MatchResult& m_matchResult;
const IncludedProperties m_includedProperties;
const CascadeLevel m_maximumCascadeLevel;
const std::optional<CascadeLayerPriority> m_maximumCascadeLayerPriorityForRollback;
mutable Direction m_direction;
mutable bool m_directionIsUnresolved { true };
Property m_properties[numCSSProperties + 2];
std::bitset<numCSSProperties + 2> m_propertyIsPresent;
Vector<Property, 8> m_deferredProperties;
HashMap<AtomString, Property> m_customProperties;
};
inline bool PropertyCascade::hasProperty(CSSPropertyID id) const
{
ASSERT(id < m_propertyIsPresent.size());
return m_propertyIsPresent[id];
}
inline const PropertyCascade::Property& PropertyCascade::property(CSSPropertyID id) const
{
return m_properties[id];
}
inline bool PropertyCascade::hasCustomProperty(const String& name) const
{
return m_customProperties.contains(name);
}
inline PropertyCascade::Property PropertyCascade::customProperty(const String& name) const
{
return m_customProperties.get(name);
}
}
}
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