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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/

#ifndef QMLJSLOOKUPCONTEXT_H
#define QMLJSLOOKUPCONTEXT_H

#include "qmljsdocument.h"
#include "qmljsinterpreter.h"
#include "parser/qmljsastfwd_p.h"

#include <QtCore/QSharedPointer>
#include <QtCore/QScopedPointer>

namespace QmlJS {

class LookupContextData;

namespace Interpreter {
class Value;
class Context;
}

class QMLJS_EXPORT LookupContext
{
    Q_DISABLE_COPY(LookupContext)

    LookupContext(const Document::Ptr doc, const Snapshot &snapshot, const QList<AST::Node *> &path);
    LookupContext(const Document::Ptr doc, const Snapshot &snapshot,
                  const Interpreter::Context &linkedContextWithoutScope,
                  const QList<AST::Node *> &path);

public:
    ~LookupContext();

    typedef QSharedPointer<LookupContext> Ptr;

    // consider using SemanticInfo::lookupContext instead, it's faster
    static Ptr create(const Document::Ptr doc, const Snapshot &snapshot,
                      const QList<AST::Node *> &path);
    static Ptr create(const Document::Ptr doc, const Snapshot &snapshot,
                      const Interpreter::Context &linkedContextWithoutScope,
                      const QList<AST::Node *> &path);

    const Interpreter::Value *evaluate(AST::Node *node) const;

    Document::Ptr document() const;
    Snapshot snapshot() const;
    Interpreter::Engine *engine() const;
    const Interpreter::Context *context() const;

private:
    QScopedPointer<LookupContextData> d;
};

} // end of namespace QmlJS

#endif // QMLJSLOOKUPCONTEXT_H