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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 "StyleRotate.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 Rotate::apply(TransformationMatrix& transform, const FloatSize& size) const
{
if (RefPtr protectedValue = value)
protectedValue->apply(transform, size);
}
// MARK: - Conversion
auto CSSValueConversion<Rotate>::operator()(BuilderState& state, const CSSValue& value) -> Rotate
{
// https://drafts.csswg.org/css-transforms-2/#propdef-rotate
// none | <angle> | [ x | y | z | <number>{3} ] && <angle>
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 { };
// Only an angle was specified.
if (list->size() == 1)
return RotateTransformFunction::create(toStyleFromCSSValue<Angle<>>(state, list->item(0)), TransformFunctionBase::Type::Rotate);
// An axis identifier and angle were specified.
if (list->size() == 2) {
auto axis = list->item(0).valueID();
auto angle = toStyleFromCSSValue<Angle<>>(state, list->item(1));
switch (axis) {
case CSSValueX:
return RotateTransformFunction::create(1_css_number, 0_css_number, 0_css_number, angle, TransformFunctionBase::Type::RotateX);
case CSSValueY:
return RotateTransformFunction::create(0_css_number, 1_css_number, 0_css_number, angle, TransformFunctionBase::Type::RotateY);
case CSSValueZ:
return RotateTransformFunction::create(0_css_number, 0_css_number, 1_css_number, angle, TransformFunctionBase::Type::RotateZ);
default:
break;
}
ASSERT_NOT_REACHED();
return RotateTransformFunction::create(angle, TransformFunctionType::Rotate);
}
ASSERT(list->size() == 4);
// An axis vector and angle were specified.
auto x = toStyleFromCSSValue<Number<>>(state, list->item(0));
auto y = toStyleFromCSSValue<Number<>>(state, list->item(1));
auto z = toStyleFromCSSValue<Number<>>(state, list->item(2));
auto angle = toStyleFromCSSValue<Angle<>>(state, list->item(3));
return RotateTransformFunction::create(x, y, z, angle, TransformFunctionType::Rotate3D);
}
// MARK: - Blending
auto Blending<Rotate>::blend(const Rotate& from, const Rotate& to, const BlendingContext& context) -> Rotate
{
RefPtr fromRotate = from.value;
RefPtr toRotate = to.value;
if (!fromRotate && !toRotate)
return CSS::Keyword::None { };
auto identity = [&](const auto& other) {
return RotateTransformFunction::create(0_css_deg, other.type());
};
auto fromFunction = fromRotate ? Ref(*fromRotate) : identity(*toRotate);
auto toFunction = toRotate ? Ref(*toRotate) : identity(*fromRotate);
// Ensure the two transforms have the same type.
if (!fromFunction->isSameType(toFunction)) {
RefPtr<const RotateTransformFunction> normalizedFrom;
RefPtr<const RotateTransformFunction> normalizedTo;
if (fromFunction->is3DOperation() || toFunction->is3DOperation()) {
normalizedFrom = RotateTransformFunction::create(fromFunction->x(), fromFunction->y(), fromFunction->z(), fromFunction->angle(), TransformFunctionType::Rotate3D);
normalizedTo = RotateTransformFunction::create(toFunction->x(), toFunction->y(), toFunction->z(), toFunction->angle(), TransformFunctionType::Rotate3D);
} else {
normalizedFrom = RotateTransformFunction::create(fromFunction->angle(), TransformFunctionType::Rotate);
normalizedTo = RotateTransformFunction::create(toFunction->angle(), TransformFunctionType::Rotate);
}
return blend(Rotate { normalizedFrom.releaseNonNull() }, Rotate { normalizedTo.releaseNonNull() }, context);
}
if (auto blendedFunction = toFunction->blend(fromFunction.ptr(), context); RefPtr rotate = dynamicDowncast<RotateTransformFunction>(blendedFunction))
return RotateTransformFunction::create(rotate->x(), rotate->y(), rotate->z(), rotate->angle(), rotate->type());
return CSS::Keyword::None { };
}
// MARK: - Platform
auto ToPlatform<Rotate>::operator()(const Rotate& 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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