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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+Animations.h"
#include "CSSCalcSymbolTable.h"
#include "CSSParserContext.h"
#include "CSSParserIdioms.h"
#include "CSSParserTokenRange.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertyParser.h"
#include "CSSPropertyParserConsumer+Ident.h"
#include "CSSPropertyParserConsumer+Percentage.h"
#include "CSSPropertyParserConsumer+Timeline.h"
#include "Length.h"
namespace WebCore {
namespace CSSPropertyParserHelpers {
Vector<std::pair<CSSValueID, double>> consumeKeyframeKeyList(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <keyframe-selector> = from | to | <percentage [0,100]> | <timeline-range-name> <percentage>
// https://drafts.csswg.org/css-animations-1/#typedef-keyframe-selector
enum class RestrictedToZeroToHundredRange : bool { No, Yes };
auto consumeAndConvertPercentage = [&](CSSParserTokenRange& range, RestrictedToZeroToHundredRange restricted) -> std::optional<double> {
// FIXME: We use resolveAsPercentageDeprecated() to deal with calc() and % values.
// We will eventually want to return a CSS value that can be kept as-is on a
// BlendingKeyframe so that resolution happens when we have the necessary context
// when the keyframes are associated with a target element.
if (auto percentageValue = consumePercentage(range, context, ValueRange::All)) {
auto resolvedPercentage = percentageValue->resolveAsPercentageDeprecated();
if (restricted == RestrictedToZeroToHundredRange::No)
return resolvedPercentage / 100;
if (resolvedPercentage >= 0 && resolvedPercentage <= 100)
return resolvedPercentage / 100;
}
return { };
};
auto timelineRange = [&](CSSParserTokenRange& range, CSSValueID id) -> std::optional<std::pair<CSSValueID, double>> {
if (CSSPropertyParserHelpers::isAnimationRangeKeyword(id)) {
// "normal" will be considered valid by isAnimationRangeKeyword() but is not valid for a @keyframes rule.
if (id == CSSValueNormal)
return { };
if (auto convertedPercentage = consumeAndConvertPercentage(range, RestrictedToZeroToHundredRange::No))
return { { id, *convertedPercentage } };
}
return { };
};
Vector<std::pair<CSSValueID, double>> result;
while (true) {
range.consumeWhitespace();
if (auto tokenValue = consumeIdent(range)) {
auto valueId = tokenValue->valueID();
if (valueId == CSSValueFrom)
result.append({ CSSValueNormal, 0 });
else if (valueId == CSSValueTo)
result.append({ CSSValueNormal, 1 });
else if (auto pair = timelineRange(range, valueId))
result.append(*pair);
else
return { }; // Parser error, invalid value in keyframe selector
} else if (auto convertedPercentage = consumeAndConvertPercentage(range, RestrictedToZeroToHundredRange::Yes))
result.append({ CSSValueNormal, *convertedPercentage });
else
return { }; // Parser error, invalid value in keyframe selector
if (range.atEnd()) {
result.shrinkToFit();
return result;
}
if (range.consume().type() != CommaToken)
return { }; // Parser error
}
}
RefPtr<CSSValue> consumeKeyframesName(CSSParserTokenRange& range, const CSSParserContext&)
{
// <keyframes-name> = <custom-ident> | <string>
// https://drafts.csswg.org/css-animations/#typedef-keyframes-name
if (range.peek().type() == StringToken) {
auto& token = range.consumeIncludingWhitespace();
auto valueId = cssValueKeywordID(token.value());
if (isValidCustomIdentifier(valueId) && valueId != CSSValueNone)
return CSSPrimitiveValue::createCustomIdent(token.value().toString());
return CSSPrimitiveValue::create(token.value().toString());
}
return consumeCustomIdent(range);
}
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
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