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/*
* Copyright (C) 2025 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 "StyleItemTolerance.h"
#include "CSSPrimitiveValue.h"
#include "StyleBuilderChecking.h"
#include "StylePrimitiveNumericTypes+Blending.h"
#include "StylePrimitiveNumericTypes+CSSValueConversion.h"
namespace WebCore {
namespace Style {
using namespace CSS::Literals;
// MARK: - Conversion
auto CSSValueConversion<ItemTolerance>::operator()(BuilderState& state, const CSSValue& value) -> ItemTolerance
{
if (RefPtr primitiveValue = dynamicDowncast<CSSPrimitiveValue>(value)) {
switch (primitiveValue->valueID()) {
case CSSValueNormal:
return CSS::Keyword::Normal { };
case CSSValueInfinite:
return CSS::Keyword::Infinite { };
default:
break;
}
// If not a keyword, it must be a <length-percentage [0,∞]>
return toStyleFromCSSValue<LengthPercentage<CSS::NonnegativeUnzoomed>>(state, *primitiveValue);
}
state.setCurrentPropertyInvalidAtComputedValueTime();
return CSS::Keyword::Normal { };
}
// MARK: - Blending
auto Blending<ItemTolerance>::canBlend(const ItemTolerance& a, const ItemTolerance& b) -> bool
{
// Can only blend if both are length-percentage values
return !a.isNormal() && !a.isInfinite() && !b.isNormal() && !b.isInfinite();
}
auto Blending<ItemTolerance>::blend(const ItemTolerance& a, const ItemTolerance& b, const BlendingContext& context) -> ItemTolerance
{
if (context.isDiscrete) {
ASSERT(!context.progress || context.progress == 1);
return context.progress ? b : a;
}
ASSERT(!a.isNormal());
ASSERT(!a.isInfinite());
ASSERT(!b.isNormal());
ASSERT(!b.isInfinite());
// Both must be length-percentage values
return a.switchOn(
[&](const LengthPercentage<CSS::NonnegativeUnzoomed>& aValue) {
return b.switchOn(
[&](const LengthPercentage<CSS::NonnegativeUnzoomed>& bValue) -> ItemTolerance {
return WebCore::Style::blend(aValue, bValue, context);
},
[&](auto) -> ItemTolerance {
ASSERT_NOT_REACHED();
return a;
}
);
},
[&](auto) -> ItemTolerance {
ASSERT_NOT_REACHED();
return a;
}
);
}
} // namespace Style
} // namespace WebCore
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