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/*
* Copyright (C) 2016-2023 Apple Inc. All rights reserved.
* Copyright (C) 2024 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 "CSSPropertyParserConsumer+Ratio.h"
#include "CSSParserContext.h"
#include "CSSParserTokenRange.h"
#include "CSSPropertyParserConsumer+MetaConsumer.h"
#include "CSSPropertyParserConsumer+NumberDefinitions.h"
#include "CSSPropertyParserConsumer+Primitives.h"
#include "CSSPropertyParserState.h"
#include "CSSRatioValue.h"
namespace WebCore {
namespace CSSPropertyParserHelpers {
std::optional<CSS::Ratio> consumeUnresolvedRatio(CSSParserTokenRange& range, CSS::PropertyParserState& state)
{
// <ratio> = <number [0,∞]> [ / <number [0,∞]> ]?
// https://drafts.csswg.org/css-values-4/#ratio-value
auto rangeCopy = range;
auto numerator = MetaConsumer<CSS::Number<CSS::Nonnegative>>::consume(rangeCopy, state);
if (!numerator)
return { };
if (!CSSPropertyParserHelpers::consumeSlashIncludingWhitespace(rangeCopy)) {
range = rangeCopy;
return CSS::Ratio { WTFMove(*numerator) };
}
auto denominator = MetaConsumer<CSS::Number<CSS::Nonnegative>>::consume(rangeCopy, state);
if (!denominator)
return { };
range = rangeCopy;
return CSS::Ratio { WTFMove(*numerator), WTFMove(*denominator) };
}
std::optional<CSS::Ratio> consumeUnresolvedRatioWithBothNumeratorAndDenominator(CSSParserTokenRange& range, CSS::PropertyParserState& state)
{
// <ratio> = <number [0,∞]> [ / <number [0,∞]> ]?
// https://drafts.csswg.org/css-values-4/#ratio-value
auto rangeCopy = range;
auto numerator = MetaConsumer<CSS::Number<CSS::Nonnegative>>::consume(rangeCopy, state);
if (!numerator)
return { };
if (!CSSPropertyParserHelpers::consumeSlashIncludingWhitespace(rangeCopy))
return { };
auto denominator = MetaConsumer<CSS::Number<CSS::Nonnegative>>::consume(rangeCopy, state);
if (!denominator)
return { };
range = rangeCopy;
return CSS::Ratio { WTFMove(*numerator), WTFMove(*denominator) };
}
RefPtr<CSSValue> consumeRatio(CSSParserTokenRange& range, CSS::PropertyParserState& state)
{
if (auto ratio = consumeUnresolvedRatio(range, state))
return CSSRatioValue::create(WTFMove(*ratio));
return nullptr;
}
RefPtr<CSSValue> consumeRatioWithBothNumeratorAndDenominator(CSSParserTokenRange& range, CSS::PropertyParserState& state)
{
if (auto ratio = consumeUnresolvedRatioWithBothNumeratorAndDenominator(range, state))
return CSSRatioValue::create(WTFMove(*ratio));
return nullptr;
}
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
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