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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+Attr.h"
#include "CSSAttrValue.h"
#include "CSSParserContext.h"
#include "CSSParserTokenRange.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertyParserConsumer+Primitives.h"
#include <wtf/text/AtomString.h>
namespace WebCore {
namespace CSSPropertyParserHelpers {
RefPtr<CSSValue> consumeAttr(CSSParserTokenRange args, const CSSParserContext& context)
{
// Standard says this should be:
//
// <attr()> = attr( <attr-name> <attr-type>? , <declaration-value>?)
// <attr-name> = [ <ident-token> '|' ]? <ident-token>
// <attr-type> = type( <syntax> ) | string | <attr-unit>
// https://drafts.csswg.org/css-values-5/#funcdef-attr
// FIXME: Add support for complete <attr-name> syntax, including namespace support.
// FIXME: Add support for <attr-type> syntax
if (args.peek().type() != IdentToken)
return nullptr;
CSSParserToken token = args.consumeIncludingWhitespace();
AtomString attrName;
if (context.isHTMLDocument)
attrName = token.value().convertToASCIILowercaseAtom();
else
attrName = token.value().toAtomString();
if (!args.atEnd() && !consumeCommaIncludingWhitespace(args))
return nullptr;
RefPtr<CSSValue> fallback;
if (args.peek().type() == StringToken) {
token = args.consumeIncludingWhitespace();
fallback = CSSPrimitiveValue::create(token.value().toString());
}
if (!args.atEnd())
return nullptr;
auto attr = CSSAttrValue::create(WTFMove(attrName), WTFMove(fallback));
// FIXME: Consider moving to a CSSFunctionValue with a custom-ident rather than a special CSS_ATTR primitive value.
return CSSPrimitiveValue::create(WTFMove(attr));
}
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
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