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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 "StyleTextUnderlineOffset.h"
#include "AnimationUtilities.h"
#include "RenderStyle.h"
#include "StyleBuilderState.h"
#include "StylePrimitiveNumericTypes+Evaluation.h"
namespace WebCore {
namespace Style {
float TextUnderlineOffset::resolve(const RenderStyle& style, float autoValue) const
{
return WTF::switchOn(*this,
[&](const CSS::Keyword::Auto&) -> float {
return autoValue;
},
[&](const Fixed& fixed) -> float {
return Style::evaluate<float>(fixed, style.usedZoomForLength());
},
[&](const Calc& calc) -> float {
return Style::evaluate<float>(calc, style.computedFontSize(), style.usedZoomForLength());
},
[&](const Percentage& percentage) -> float {
return Style::evaluate<float>(percentage, style.computedFontSize());
}
);
}
// MARK: - Blending
auto Blending<TextUnderlineOffset>::canBlend(const TextUnderlineOffset& a, const TextUnderlineOffset& b, const RenderStyle& aStyle, const RenderStyle& bStyle) -> bool
{
if (a.isAuto() || b.isAuto())
return false;
return a.resolve(aStyle) != b.resolve(bStyle);
}
auto Blending<TextUnderlineOffset>::blend(const TextUnderlineOffset& a, const TextUnderlineOffset& b, const RenderStyle& aStyle, const RenderStyle& bStyle, const BlendingContext& context) -> TextUnderlineOffset
{
if (context.isDiscrete) {
ASSERT(!context.progress || context.progress == 1.0);
return context.progress ? b : a;
}
return TextUnderlineOffset { TextUnderlineOffset::Fixed { WebCore::blend(a.resolve(aStyle), b.resolve(bStyle), context) } };
}
} // namespace Style
} // namespace WebCore
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