/****************************************************************************
** $Id: qsinterpreter.h  1.1.3   edited 2004-01-28T15:40:40$
**
** Copyright (C) 2001-2003 Trolltech AS.  All rights reserved.
**
** This file is part of the Qt Script for Applications framework (QSA).
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding a valid Qt Script for Applications license may use
** this file in accordance with the Qt Script for Applications License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about QSA Commercial License Agreements.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
*****************************************************************************/

#ifndef QSINTERPRETER_H
#define QSINTERPRETER_H

#include "qsaglobal.h"
#include "qsproject.h"
#include "qsargument.h"

#include <qobject.h>
#include <qvariant.h>
#include <qobjectlist.h>

class QSProject;
class QSInterpreterPrivate;
class QuickInterpreter;
class QSObjectFactory;
class QSWrapperFactory;

class QSA_EXPORT QSStackFrame
{
public:
    QSStackFrame( const QString &fun = QString::null,
		  const QString &file = QString::null,
		  int line = 0,
		  QObject *con = 0 ) :
	fname( file ), func( fun ), ln( line ), cont( con )
    {
    }

    QString scriptName() const { return fname; }
    QString function() const { return func; }
    int line() const { return ln; }
    QObject *context() const { return cont; }
private:
    QString fname, func;
    int ln;
    QObject *cont;
};

bool operator==( const QSStackFrame &a, const QSStackFrame &b );

class QSA_EXPORT QSStackTrace : public QValueList<QSStackFrame>
{
public:
    QString toString() const;
};

class QSA_EXPORT QSInterpreter : public QObject
{
    friend class QSProject;
    friend class QSWrapperFactory; // for access to interpreter()
    friend class QSObjectFactory;
    friend class QSInterfaceFactory;
    friend class QSToolkitFactory;
    friend QuickInterpreter *get_quick_interpreter( QSInterpreter *ip );

    Q_OBJECT
    Q_ENUMS( ErrorMode )
    Q_PROPERTY( ErrorMode errorMode READ errorMode WRITE setErrorMode )
    Q_PROPERTY( int timeoutInterval READ timeoutInterval WRITE setTimeoutInterval )

public:
    enum ErrorMode { Notify, Nothing };
    enum ClassFlags { AllClasses, GlobalClasses };
    enum FunctionFlags { FunctionNames = 0,
			 FunctionSignatures = 1,
			 IncludeMemberFunctions = 2 };

    QSInterpreter( QObject *parent = 0, const char *name = 0 );
    virtual ~QSInterpreter();

    static QSInterpreter *defaultInterpreter();

    QSArgument evaluate( const QString &code, QObject *context = 0,
			 const QString &scriptName = QString::null );
    QSArgument call( const QString &function,
		   const QSArgumentList &arguments = QSArgumentList(),
		   QObject *context = 0 );
    QObject *currentContext() const;

    bool checkSyntax( const QString &code );

    void setErrorMode( ErrorMode m );
    ErrorMode errorMode() const;

    QSProject* project() const;

    QStringList functions( FunctionFlags flag = FunctionNames ) const;
    QStringList functions( const QString &context,
			   uint mask = FunctionNames ) const;
    QStringList functions( QObject *context,
			   FunctionFlags flag = FunctionNames ) const;

    QStringList classes( ClassFlags = AllClasses ) const;
    QStringList classes( const QString &context ) const;
    QStringList classes( QObject *context ) const;

    QStringList variables() const;
    QStringList variables( const QString &context ) const;
    QStringList variables( QObject *context ) const;

    bool hasFunction(const QString &function) const;
    bool hasClass(const QString &className) const;
    bool hasVariable(const QString &variable) const;

    void addTransientVariable(const QString &variable, const QSArgument &arg, QObject *context=0);
    QSArgument variable(const QString &variable, QObject *context=0) const;

    QObjectList presentObjects() const;
    void addTransientObject( QObject *object );

    bool isRunning() const;

    void throwError( const QString &message );

    void addObjectFactory( QSObjectFactory *factory );
    void addWrapperFactory( QSWrapperFactory *factory );

    QSStackTrace stackTrace() const;
    QString errorMessage() const;
    bool hadError() const;

    void addTransientSignalHandler( QObject *sender,
				    const char *signal,
				    const char *qtscriptFunction );

    void removeTransientSignalHandler( QObject *sender,
				       const char *signal,
				       const char *qtscriptFunction );

    void setTimeoutInterval(int msecs);
    int timeoutInterval() const;

public slots:
    void clear();
    void stopExecution();

signals:
    void error( const QString &message, const QString &scriptName,
		int lineNumber );
    void error( const QString &message, QObject *context,
		const QString &scriptName, int lineNumber );

    void timeout(int runnningTime);

private:
    // disabled copy constructor and assignment operator
    QSInterpreter( const QSInterpreter & );
    QSInterpreter& operator=( const QSInterpreter & );
    QSInterpreter( QSProject *project, const char *name = 0);

    void init();

    // used by factory classes
    QuickInterpreter *interpreter() const;

    void removeObjectFactory( QSObjectFactory *factory );
    void removeWrapperFactory( QSWrapperFactory *factory );

private slots:
    void runtimeError( const QString &message, const QString &filename, int lineNumber );
    void runtimeError();
    void parseError();

private:
    QSInterpreterPrivate *d;

    uint running:1;
};

inline bool QSInterpreter::isRunning() const
{
    return running;
}

#endif
