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/*
* Copyright (C) 2008-2021 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,
* 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.
*/
#include "config.h"
#include "CSSGradientValue.h"
#include "CSSPrimitiveNumericTypes+CSSValueVisitation.h"
#include "CSSPrimitiveNumericTypes+Serialization.h"
#include "ColorInterpolation.h"
#include "StyleBuilderState.h"
#include "StyleGradientImage.h"
#include "StylePrimitiveNumericTypes+Conversions.h"
#include <wtf/text/StringBuilder.h>
namespace WebCore {
namespace CSS {
namespace {
template<typename> struct StyleImageIsUncacheable;
template<typename CSSType> static bool styleImageIsUncacheable(const CSSType& value)
{
return StyleImageIsUncacheable<CSSType>()(value);
}
template<> struct StyleImageIsUncacheable<GradientColorInterpolationMethod> {
constexpr bool operator()(const auto&) { return false; }
};
template<> struct StyleImageIsUncacheable<Color> {
bool operator()(const auto& value) { return containsCurrentColor(value) || containsColorSchemeDependentColor(value); }
};
template<CSSValueID C> struct StyleImageIsUncacheable<Constant<C>> {
constexpr bool operator()(const auto&) { return false; }
};
template<UnitEnum CSSType> struct StyleImageIsUncacheable<CSSType> {
constexpr bool operator()(const auto& value) { return conversionToCanonicalUnitRequiresConversionData(value); }
};
template<NumericRaw CSSType> struct StyleImageIsUncacheable<CSSType> {
constexpr bool operator()(const auto& value) { return styleImageIsUncacheable(value.unit); }
};
template<Calc CSSType> struct StyleImageIsUncacheable<CSSType> {
constexpr bool operator()(const auto& value) { return value.protectedCalc()->requiresConversionData(); }
};
template<OptionalLike CSSType> struct StyleImageIsUncacheable<CSSType> {
bool operator()(const auto& value) { return value && styleImageIsUncacheable(*value); }
};
template<TupleLike CSSType> struct StyleImageIsUncacheable<CSSType> {
bool operator()(const auto& value) { return WTF::apply([&](const auto& ...x) { return (styleImageIsUncacheable(x) || ...); }, value); }
};
template<RangeLike CSSType> struct StyleImageIsUncacheable<CSSType> {
bool operator()(const auto& value) { return std::ranges::any_of(value, [](auto& element) { return styleImageIsUncacheable(element); }); }
};
template<VariantLike CSSType> struct StyleImageIsUncacheable<CSSType> {
bool operator()(const auto& value) { return WTF::switchOn(value, [](const auto& alternative) { return styleImageIsUncacheable(alternative); }); }
};
} // namespace (anonymous)
} // namespace CSS
// MARK: -
RefPtr<StyleImage> CSSGradientValue::createStyleImage(const Style::BuilderState& state) const
{
if (m_cachedStyleImage)
return m_cachedStyleImage;
auto styleImage = StyleGradientImage::create(
Style::toStyle(m_gradient, state)
);
if (!CSS::styleImageIsUncacheable(m_gradient))
m_cachedStyleImage = styleImage.ptr();
return styleImage;
}
String CSSGradientValue::customCSSText(const CSS::SerializationContext& context) const
{
return CSS::serializationForCSS(context, m_gradient);
}
bool CSSGradientValue::equals(const CSSGradientValue& other) const
{
return m_gradient == other.m_gradient;
}
IterationStatus CSSGradientValue::customVisitChildren(NOESCAPE const Function<IterationStatus(CSSValue&)>& func) const
{
return CSS::visitCSSValueChildren(func, m_gradient);
}
} // namespace WebCore
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