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/*
* Copyright (C) 2025 Samuel Weinig <sam@webkit.org>
*
* 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.
*/
#include "config.h"
#include "StyleScale.h"
#include "StyleBuilderChecking.h"
#include "StylePrimitiveNumericTypes+Blending.h"
#include "StylePrimitiveNumericTypes+CSSValueConversion.h"
#include "StylePrimitiveNumericTypes+CSSValueCreation.h"
namespace WebCore {
namespace Style {
using namespace CSS::Literals;
void Scale::apply(TransformationMatrix& transform, const FloatSize& size) const
{
if (RefPtr protectedValue = value)
protectedValue->apply(transform, size);
}
// MARK: - Conversion
auto CSSValueConversion<Scale>::operator()(BuilderState& state, const CSSValue& value) -> Scale
{
// https://drafts.csswg.org/css-transforms-2/#propdef-scale
// none | [ <number> | <percentage> ]{1,3}
if (RefPtr primitiveValue = dynamicDowncast<CSSPrimitiveValue>(value)) {
ASSERT_UNUSED(primitiveValue, primitiveValue->valueID() == CSSValueNone);
return CSS::Keyword::None { };
}
auto list = requiredListDowncast<CSSValueList, CSSPrimitiveValue>(state, value);
if (!list)
return CSS::Keyword::None { };
auto sx = toStyleFromCSSValue<NumberOrPercentageResolvedToNumber<>>(state, list->item(0));
auto sy = list->size() > 1 ? toStyleFromCSSValue<NumberOrPercentageResolvedToNumber<>>(state, list->item(1)) : sx;
auto sz = list->size() > 2 ? toStyleFromCSSValue<NumberOrPercentageResolvedToNumber<>>(state, list->item(2)) : NumberOrPercentageResolvedToNumber<> { 1_css_number };
return ScaleTransformFunction::create(sx, sy, sz, TransformFunctionType::Scale);
}
// MARK: - Blending
auto Blending<Scale>::blend(const Scale& from, const Scale& to, const BlendingContext& context) -> Scale
{
RefPtr fromScale = from.value;
RefPtr toScale = to.value;
if (!fromScale && !toScale)
return CSS::Keyword::None { };
auto identity = [&](const auto& other) {
return ScaleTransformFunction::create(1_css_number, 1_css_number, 1_css_number, other.type());
};
auto fromFunction = fromScale ? Ref(*fromScale) : identity(*toScale);
auto toFunction = toScale ? Ref(*toScale) : identity(*fromScale);
// Ensure the two transforms have the same type.
if (!fromFunction->isSameType(toFunction)) {
RefPtr<const ScaleTransformFunction> normalizedFrom;
RefPtr<const ScaleTransformFunction> normalizedTo;
if (fromFunction->is3DOperation() || toFunction->is3DOperation()) {
normalizedFrom = ScaleTransformFunction::create(fromFunction->x(), fromFunction->y(), fromFunction->z(), TransformFunctionType::Scale3D);
normalizedTo = ScaleTransformFunction::create(toFunction->x(), toFunction->y(), toFunction->z(), TransformFunctionType::Scale3D);
} else {
normalizedFrom = ScaleTransformFunction::create(fromFunction->x(), fromFunction->y(), TransformFunctionType::Scale);
normalizedTo = ScaleTransformFunction::create(toFunction->x(), toFunction->y(), TransformFunctionType::Scale);
}
return blend(Scale { normalizedFrom.releaseNonNull() }, Scale { normalizedTo.releaseNonNull() }, context);
}
if (auto blendedFunction = toFunction->blend(fromFunction.ptr(), context); RefPtr scale = dynamicDowncast<ScaleTransformFunction>(blendedFunction))
return ScaleTransformFunction::create(scale->x(), scale->y(), scale->z(), scale->type());
return CSS::Keyword::None { };
}
// MARK: - Platform
auto ToPlatform<Scale>::operator()(const Scale& value, const FloatSize& size) -> RefPtr<TransformOperation>
{
if (RefPtr function = value.value)
return function->toPlatform(size);
return nullptr;
}
} // namespace Style
} // namespace WebCore
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