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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 "StyleShapeOutside.h"
#include "AnimationUtilities.h"
#include "CSSBasicShapeValue.h"
#include "CSSValueList.h"
#include "CachedImage.h"
#include "StyleBuilderChecking.h"
#include "StylePrimitiveKeyword+CSSValueConversion.h"
#include "StylePrimitiveNumericTypes+Blending.h"
namespace WebCore {
namespace Style {
bool ShapeOutside::Image::isValid() const
{
Ref styleImage = image.value;
if (styleImage->hasCachedImage()) {
auto* cachedImage = styleImage->cachedImage();
return cachedImage && cachedImage->hasImage();
}
return styleImage->isGeneratedImage();
}
// MARK: - Conversion
auto CSSValueConversion<ShapeOutside>::operator()(BuilderState& state, const CSSValue& value) -> ShapeOutside
{
if (RefPtr primitiveValue = dynamicDowncast<CSSPrimitiveValue>(value)) {
if (primitiveValue->valueID() == CSSValueNone)
return CSS::Keyword::None { };
state.setCurrentPropertyInvalidAtComputedValueTime();
return CSS::Keyword::None { };
}
if (value.isImage())
return ShapeOutside::Image { ImageWrapper { state.createStyleImage(value).releaseNonNull() } };
std::optional<BasicShape> shape;
auto referenceBox = CSSBoxType::BoxMissing;
auto processSingleValue = [&](const CSSValue& currentValue) {
if (RefPtr shapeValue = dynamicDowncast<CSSBasicShapeValue>(currentValue))
shape = toStyle(shapeValue->shape(), state, 1.0f);
else
referenceBox = toStyleFromCSSValue<CSSBoxType>(state, currentValue);
};
if (RefPtr list = dynamicDowncast<CSSValueList>(value)) {
for (Ref currentValue : *list)
processSingleValue(currentValue);
} else
processSingleValue(value);
if (shape) {
if (referenceBox != CSSBoxType::BoxMissing)
return ShapeOutside::ShapeAndShapeBox { .shape = WTFMove(*shape), .box = referenceBox };
return ShapeOutside::Shape { WTFMove(*shape) };
}
if (referenceBox != CSSBoxType::BoxMissing)
return referenceBox;
state.setCurrentPropertyInvalidAtComputedValueTime();
return CSS::Keyword::None { };
}
// MARK: - Blending
auto Blending<ShapeOutside>::canBlend(const ShapeOutside& a, const ShapeOutside& b) -> bool
{
RefPtr aValue = a.m_value;
RefPtr bValue = b.m_value;
if (!aValue || !bValue)
return false;
return WTF::visit(WTF::makeVisitor(
[](const ShapeOutside::ShapeAndShapeBox& a, const ShapeOutside::ShapeAndShapeBox& b) {
return Style::canBlend(a.shape, b.shape) && a.box == b.box;
},
[](const ShapeOutside::Shape& a, const ShapeOutside::Shape& b) {
return Style::canBlend(a, b);
},
[](const auto&, const auto&) {
return false;
}
), aValue->value, bValue->value);
}
auto Blending<ShapeOutside>::blend(const ShapeOutside& a, const ShapeOutside& b, const BlendingContext& context) -> ShapeOutside
{
if (context.isDiscrete) {
ASSERT(!context.progress || context.progress == 1);
return context.progress ? b : a;
}
ASSERT(canBlend(a, b));
RefPtr aValue = a.m_value;
RefPtr bValue = b.m_value;
return WTF::visit(WTF::makeVisitor(
[&](const ShapeOutside::ShapeAndShapeBox& a, const ShapeOutside::ShapeAndShapeBox& b) -> ShapeOutside {
return ShapeOutside::ShapeAndShapeBox {
.shape = Style::blend(a.shape, b.shape, context),
.box = a.box
};
},
[&](const ShapeOutside::Shape& a, const ShapeOutside::Shape& b) -> ShapeOutside {
return Style::blend(a, b, context);
},
[](const auto&, const auto&) -> ShapeOutside {
RELEASE_ASSERT_NOT_REACHED();
}
), aValue->value, bValue->value);
}
} // namespace Style
} // namespace WebCore
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