File: CSSPropertyParserConsumer%2BURL.cpp

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/*
 * 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+URL.h"

#include "CSSParserTokenRange.h"
#include "CSSPrimitiveValue.h"
#include "CSSValueKeywords.h"
#include <wtf/text/StringView.h>

namespace WebCore {
namespace CSSPropertyParserHelpers {

// MARK: <url>
// https://drafts.csswg.org/css-values/#urls

StringView consumeURLRaw(CSSParserTokenRange& range)
{
    auto& token = range.peek();
    if (token.type() == UrlToken) {
        range.consumeIncludingWhitespace();
        return token.value();
    }

    if (token.functionId() == CSSValueUrl) {
        auto rangeCopy = range;
        auto args = rangeCopy.consumeBlock();
        auto& next = args.consumeIncludingWhitespace();
        if (next.type() == BadStringToken || !args.atEnd())
            return StringView();
        ASSERT(next.type() == StringToken);
        range = rangeCopy;
        range.consumeWhitespace();
        return next.value();
    }

    return { };
}

RefPtr<CSSPrimitiveValue> consumeURL(CSSParserTokenRange& range)
{
    auto url = consumeURLRaw(range);
    if (url.isNull())
        return nullptr;
    return CSSPrimitiveValue::createURI(url.toString());
}

} // namespace CSSPropertyParserHelpers
} // namespace WebCore