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/**
* Copyright (C) 2023 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 "StyleProperties.h"
namespace WebCore {
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(ImmutableStyleProperties);
class ImmutableStyleProperties final : public StyleProperties {
WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(ImmutableStyleProperties);
public:
inline void deref() const;
WEBCORE_EXPORT ~ImmutableStyleProperties();
static Ref<ImmutableStyleProperties> create(const CSSProperty* properties, unsigned count, CSSParserMode);
unsigned propertyCount() const { return m_arraySize; }
bool isEmpty() const { return !propertyCount(); }
PropertyReference propertyAt(unsigned index) const;
Iterator<ImmutableStyleProperties> begin() const { return { *this }; }
static constexpr std::nullptr_t end() { return nullptr; }
unsigned size() const { return propertyCount(); }
int findPropertyIndex(CSSPropertyID) const;
int findCustomPropertyIndex(StringView propertyName) const;
static constexpr size_t objectSize(unsigned propertyCount);
void* m_storage;
private:
PackedPtr<const CSSValue>* valueArray() const;
const StylePropertyMetadata* metadataArray() const;
ImmutableStyleProperties(const CSSProperty*, unsigned count, CSSParserMode);
};
inline void ImmutableStyleProperties::deref() const
{
if (derefBase())
delete this;
}
inline PackedPtr<const CSSValue>* ImmutableStyleProperties::valueArray() const
{
return bitwise_cast<PackedPtr<const CSSValue>*>(bitwise_cast<const uint8_t*>(metadataArray()) + (m_arraySize * sizeof(StylePropertyMetadata)));
}
inline const StylePropertyMetadata* ImmutableStyleProperties::metadataArray() const
{
return reinterpret_cast<const StylePropertyMetadata*>(const_cast<const void**>((&(this->m_storage))));
}
inline ImmutableStyleProperties::PropertyReference ImmutableStyleProperties::propertyAt(unsigned index) const
{
return PropertyReference(metadataArray()[index], valueArray()[index].get());
}
constexpr size_t ImmutableStyleProperties::objectSize(unsigned count)
{
return sizeof(ImmutableStyleProperties) - sizeof(void*) + sizeof(StylePropertyMetadata) * count + sizeof(PackedPtr<const CSSValue>) * count;
}
}
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ImmutableStyleProperties)
static bool isType(const WebCore::StyleProperties& properties) { return !properties.isMutable(); }
SPECIALIZE_TYPE_TRAITS_END()
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