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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 "StyleTextIndent.h"
#include "StyleBuilderChecking.h"
#include "StyleLengthWrapper+Blending.h"
#include "StyleLengthWrapper+CSSValueConversion.h"
#include "StylePrimitiveNumericTypes+Blending.h"
namespace WebCore {
namespace Style {
auto CSSValueConversion<TextIndent>::operator()(BuilderState& state, const CSSValue& value) -> TextIndent
{
if (RefPtr primitiveValue = dynamicDowncast<CSSPrimitiveValue>(value))
return toStyleFromCSSValue<TextIndentLength>(state, *primitiveValue);
auto list = requiredListDowncast<CSSValueList, CSSPrimitiveValue>(state, value);
if (!list)
return 0_css_px;
std::optional<TextIndentLength> length;
std::optional<CSS::Keyword::Hanging> hanging;
std::optional<CSS::Keyword::EachLine> eachLine;
for (RefPtr primitiveValue : *list) {
if (primitiveValue->valueID() == CSSValueHanging)
hanging = CSS::Keyword::Hanging { };
else if (primitiveValue->valueID() == CSSValueEachLine)
eachLine = CSS::Keyword::EachLine { };
else
length = toStyleFromCSSValue<TextIndentLength>(state, *primitiveValue);
}
if (!length) {
state.setCurrentPropertyInvalidAtComputedValueTime();
return 0_css_px;
}
return TextIndent { WTFMove(*length), hanging, eachLine };
}
// MARK: - Blending
auto Blending<TextIndent>::canBlend(const TextIndent& a, const TextIndent& b) -> bool
{
return a.hanging == b.hanging
&& a.eachLine == b.eachLine
&& Style::canBlend(a.length, b.length);
}
auto Blending<TextIndent>::blend(const TextIndent& a, const TextIndent& b, const BlendingContext& context) -> TextIndent
{
if (context.isDiscrete) {
ASSERT(!context.progress || context.progress == 1);
return context.progress ? b : a;
}
ASSERT(a.hanging == b.hanging);
ASSERT(a.eachLine == b.eachLine);
return TextIndent { Style::blend(a.length, b.length, context), a.hanging, a.eachLine };
}
} // namespace Style
} // namespace WebCore
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