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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+WillChange.h"
#include "CSSParserContext.h"
#include "CSSParserTokenRange.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertyNames.h"
#include "CSSPropertyParser.h"
#include "CSSPropertyParserConsumer+Ident.h"
#include "CSSPropertyParserConsumer+Primitives.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
namespace WebCore {
namespace CSSPropertyParserHelpers {
RefPtr<CSSValue> consumeWillChange(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <'will-change'> = auto | <animateable-feature>#
// https://drafts.csswg.org/css-will-change/#propdef-will-change
if (range.peek().id() == CSSValueAuto)
return consumeIdent(range);
// Every comma-separated list of identifiers is a valid will-change value,
// unless the list includes an explicitly disallowed identifier.
CSSValueListBuilder values;
while (!range.atEnd()) {
switch (range.peek().id()) {
case CSSValueContents:
case CSSValueScrollPosition:
values.append(consumeIdent(range).releaseNonNull());
break;
case CSSValueNone:
case CSSValueAll:
case CSSValueAuto:
return nullptr;
default:
if (range.peek().type() != IdentToken)
return nullptr;
CSSPropertyID propertyID = cssPropertyID(range.peek().value());
if (propertyID == CSSPropertyWillChange)
return nullptr;
if (!isExposed(propertyID, &context.propertySettings))
propertyID = CSSPropertyInvalid;
if (propertyID != CSSPropertyInvalid) {
values.append(CSSPrimitiveValue::create(propertyID));
range.consumeIncludingWhitespace();
break;
}
if (auto customIdent = consumeCustomIdent(range)) {
// Append properties we don't recognize, but that are legal.
values.append(customIdent.releaseNonNull());
break;
}
return nullptr;
}
// This is a comma separated list
if (!range.atEnd() && !consumeCommaIncludingWhitespace(range))
return nullptr;
}
return CSSValueList::createCommaSeparated(WTFMove(values));
}
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
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