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/*
* Copyright (C) 2022 Apple Inc. All rights reserved.
*
* 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. AND ITS CONTRIBUTORS ``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 ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 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.
*/
#pragma once
#include "CSSParserTokenRange.h"
#include "CSSPropertyParserConsumer+Ident.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
#include "CSSValuePool.h"
namespace WebCore {
class CSSFontVariantLigaturesParser {
public:
enum class ParseResult : uint8_t { ConsumedValue, DisallowedValue, UnknownValue };
CSSFontVariantLigaturesParser() = default;
ParseResult consumeLigature(CSSParserTokenRange& range)
{
CSSValueID valueID = range.peek().id();
switch (valueID) {
case CSSValueNoCommonLigatures:
case CSSValueCommonLigatures:
if (m_sawCommonLigaturesValue)
return ParseResult::DisallowedValue;
m_sawCommonLigaturesValue = true;
break;
case CSSValueNoDiscretionaryLigatures:
case CSSValueDiscretionaryLigatures:
if (m_sawDiscretionaryLigaturesValue)
return ParseResult::DisallowedValue;
m_sawDiscretionaryLigaturesValue = true;
break;
case CSSValueNoHistoricalLigatures:
case CSSValueHistoricalLigatures:
if (m_sawHistoricalLigaturesValue)
return ParseResult::DisallowedValue;
m_sawHistoricalLigaturesValue = true;
break;
case CSSValueNoContextual:
case CSSValueContextual:
if (m_sawContextualLigaturesValue)
return ParseResult::DisallowedValue;
m_sawContextualLigaturesValue = true;
break;
default:
return ParseResult::UnknownValue;
}
m_result.append(CSSPropertyParserHelpers::consumeIdent(range).releaseNonNull());
return ParseResult::ConsumedValue;
}
RefPtr<CSSValue> finalizeValue()
{
if (m_result.isEmpty())
return CSSPrimitiveValue::create(CSSValueNormal);
return CSSValueList::createSpaceSeparated(WTFMove(m_result));
}
private:
bool m_sawCommonLigaturesValue = false;
bool m_sawDiscretionaryLigaturesValue = false;
bool m_sawHistoricalLigaturesValue = false;
bool m_sawContextualLigaturesValue = false;
CSSValueListBuilder m_result;
};
} // namespace WebCore
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