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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 "StyleClip.h"
#include "AnimationUtilities.h"
#include "CSSPrimitiveValue.h"
#include "CSSRectValue.h"
#include "StyleBuilderChecking.h"
#include "StylePrimitiveNumericTypes+Blending.h"
#include "StylePrimitiveNumericTypes+CSSValueConversion.h"
#include "StylePrimitiveNumericTypes+CSSValueCreation.h"
namespace WebCore {
namespace Style {
// MARK: - Conversion
auto CSSValueConversion<Clip>::operator()(BuilderState& state, const CSSValue& value) -> Clip
{
if (isValueID(value, CSSValueAuto))
return CSS::Keyword::Auto { };
RefPtr rectValue = requiredDowncast<CSSRectValue>(state, value);
if (!rectValue)
return CSS::Keyword::Auto { };
RefPtr primitiveValueTop = requiredDowncast<CSSPrimitiveValue>(state, rectValue->rect().top());
if (!primitiveValueTop)
return CSS::Keyword::Auto { };
RefPtr primitiveValueRight = requiredDowncast<CSSPrimitiveValue>(state, rectValue->rect().right());
if (!primitiveValueRight)
return CSS::Keyword::Auto { };
RefPtr primitiveValueBottom = requiredDowncast<CSSPrimitiveValue>(state, rectValue->rect().bottom());
if (!primitiveValueBottom)
return CSS::Keyword::Auto { };
RefPtr primitiveValueLeft = requiredDowncast<CSSPrimitiveValue>(state, rectValue->rect().left());
if (!primitiveValueLeft)
return CSS::Keyword::Auto { };
auto convertEdge = [&](Ref<const CSSPrimitiveValue>&& primitiveValue) -> ClipEdge {
if (isValueID(primitiveValue.get(), CSSValueAuto))
return CSS::Keyword::Auto { };
return toStyleFromCSSValue<Length<>>(state, primitiveValue);
};
return ClipRect {
convertEdge(primitiveValueTop.releaseNonNull()),
convertEdge(primitiveValueRight.releaseNonNull()),
convertEdge(primitiveValueBottom.releaseNonNull()),
convertEdge(primitiveValueLeft.releaseNonNull()),
};
}
Ref<CSSValue> CSSValueCreation<ClipRect>::operator()(CSSValuePool& pool, const RenderStyle& style, const ClipRect& clipRect)
{
return CSSRectValue::create({
createCSSValue(pool, style, clipRect.value->top()),
createCSSValue(pool, style, clipRect.value->right()),
createCSSValue(pool, style, clipRect.value->bottom()),
createCSSValue(pool, style, clipRect.value->left()),
});
}
// MARK: - Blending
template<> struct Blending<ClipEdge> {
auto canBlend(const ClipEdge&, const ClipEdge&) -> bool;
auto requiresInterpolationForAccumulativeIteration(const ClipEdge&, const ClipEdge&) -> bool;
auto blend(const ClipEdge&, const ClipEdge&, const BlendingContext&) -> ClipEdge;
};
template<> struct Blending<ClipRect> {
auto canBlend(const ClipRect&, const ClipRect&) -> bool;
auto requiresInterpolationForAccumulativeIteration(const ClipRect&, const ClipRect&) -> bool;
auto blend(const ClipRect&, const ClipRect&, const BlendingContext&) -> ClipRect;
};
auto Blending<ClipEdge>::canBlend(const ClipEdge& a, const ClipEdge& b) -> bool
{
return a.isAuto() == b.isAuto();
}
auto Blending<ClipEdge>::requiresInterpolationForAccumulativeIteration(const ClipEdge& a, const ClipEdge& b) -> bool
{
return a.isAuto() != b.isAuto();
}
auto Blending<ClipEdge>::blend(const ClipEdge& a, const ClipEdge& b, const BlendingContext& context) -> ClipEdge
{
if (a.isAuto() || b.isAuto())
return context.progress < 0.5 ? a : b;
ASSERT(canBlend(a, b));
return Style::blend(*a.tryValue(), *b.tryValue(), context);
}
auto Blending<ClipRect>::canBlend(const ClipRect& a, const ClipRect& b) -> bool
{
return Style::canBlend(a.value->top(), b.value->top())
&& Style::canBlend(a.value->right(), b.value->right())
&& Style::canBlend(a.value->bottom(), b.value->bottom())
&& Style::canBlend(a.value->left(), b.value->left());
}
auto Blending<ClipRect>::requiresInterpolationForAccumulativeIteration(const ClipRect& a, const ClipRect& b) -> bool
{
return Style::requiresInterpolationForAccumulativeIteration(a.value->top(), b.value->top())
&& Style::requiresInterpolationForAccumulativeIteration(a.value->right(), b.value->right())
&& Style::requiresInterpolationForAccumulativeIteration(a.value->bottom(), b.value->bottom())
&& Style::requiresInterpolationForAccumulativeIteration(a.value->left(), b.value->left());
}
auto Blending<ClipRect>::blend(const ClipRect& a, const ClipRect& b, const BlendingContext& context) -> ClipRect
{
return ClipRect {
Style::blend(a.value->top(), b.value->top(), context),
Style::blend(a.value->right(), b.value->right(), context),
Style::blend(a.value->bottom(), b.value->bottom(), context),
Style::blend(a.value->left(), b.value->left(), context),
};
}
auto Blending<Clip>::canBlend(const Clip& a, const Clip& b) -> bool
{
return !a.isAuto() && !b.isAuto() && Style::canBlend(*a.value, *b.value);
}
auto Blending<Clip>::requiresInterpolationForAccumulativeIteration(const Clip& a, const Clip& b) -> bool
{
return Style::requiresInterpolationForAccumulativeIteration(
a.value.value_or(ClipRect { CSS::Keyword::Auto { } }),
b.value.value_or(ClipRect { CSS::Keyword::Auto { } })
);
}
auto Blending<Clip>::blend(const Clip& a, const Clip& b, const BlendingContext& context) -> Clip
{
return Style::blend(
a.value.value_or(ClipRect { CSS::Keyword::Auto { } }),
b.value.value_or(ClipRect { CSS::Keyword::Auto { } }),
context
);
}
} // namespace Style
} // namespace WebCore
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