Source/JavaScriptCore/parser/SourceCode.h

/*
 * Copyright (C) 2008, 2013 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.
 * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE 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 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;
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include "UnlinkedSourceCode.h"

namespace JSC {

    class SourceCode : public UnlinkedSourceCode {
        friend class CachedSourceCode;
        friend class CachedSourceCodeWithoutProvider;

    public:
        SourceCode()
            : UnlinkedSourceCode()
            , m_firstLine(OrdinalNumber::beforeFirst())
            , m_startColumn(OrdinalNumber::beforeFirst())
        {
        }

        SourceCode(Ref<SourceProvider>&& provider)
            : UnlinkedSourceCode(WTFMove(provider))
        {
        }

        SourceCode(Ref<SourceProvider>&& provider, int firstLine, int startColumn)
            : UnlinkedSourceCode(WTFMove(provider))
            , m_firstLine(OrdinalNumber::fromOneBasedInt(std::max(firstLine, 1)))
            , m_startColumn(OrdinalNumber::fromOneBasedInt(std::max(startColumn, 1)))
        {
        }

        SourceCode(RefPtr<SourceProvider>&& provider, int startOffset, int endOffset, int firstLine, int startColumn)
            : UnlinkedSourceCode(WTFMove(provider), startOffset, endOffset)
            , m_firstLine(OrdinalNumber::fromOneBasedInt(std::max(firstLine, 1)))
            , m_startColumn(OrdinalNumber::fromOneBasedInt(std::max(startColumn, 1)))
        {
        }

        OrdinalNumber firstLine() const { return m_firstLine; }
        OrdinalNumber startColumn() const { return m_startColumn; }

        intptr_t providerID() const
        {
            if (!m_provider)
                return SourceProvider::nullID;
            return m_provider->asID();
        }

        SourceProvider* provider() const { return m_provider.get(); }

        SourceCode subExpression(unsigned openBrace, unsigned closeBrace, int firstLine, int startColumn) const;

        bool operator==(const SourceCode& other) const
        {
            return m_firstLine == other.m_firstLine
                && m_startColumn == other.m_startColumn
                && m_provider == other.m_provider
                && m_startOffset == other.m_startOffset
                && m_endOffset == other.m_endOffset;
        }

        bool operator!=(const SourceCode& other) const
        {
            return !(*this == other);
        }

    private:
        OrdinalNumber m_firstLine;
        OrdinalNumber m_startColumn;
    };

    inline SourceCode makeSource(const String& source, const SourceOrigin& sourceOrigin, URL&& url = URL(), const TextPosition& startPosition = TextPosition(), SourceProviderSourceType sourceType = SourceProviderSourceType::Program)
    {
        return SourceCode(StringSourceProvider::create(source, sourceOrigin, WTFMove(url), startPosition, sourceType), startPosition.m_line.oneBasedInt(), startPosition.m_column.oneBasedInt());
    }
    
    inline SourceCode SourceCode::subExpression(unsigned openBrace, unsigned closeBrace, int firstLine, int startColumn) const
    {
        startColumn += 1; // Convert to base 1.
        return SourceCode(RefPtr<SourceProvider> { provider() }, openBrace, closeBrace + 1, firstLine, startColumn);
    }

} // namespace JSC