source: webkit/trunk/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
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* 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
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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#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; }

SourceID 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, String filename = String(), const TextPosition& startPosition = TextPosition(), SourceProviderSourceType sourceType = SourceProviderSourceType::Program)
{
return SourceCode(StringSourceProvider::create(source, sourceOrigin, WTFMove(filename), 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