PythonInterpreter.h

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//-----------------------------------------------------------------------------
// File: PythonInterpreter.h
//-----------------------------------------------------------------------------
// Project: Kactus2
// Author: Esko Pekkarinen
// Date: 03.02.2021
//
// Description:
// Convenience class for accessing Python interpreter.
//-----------------------------------------------------------------------------
 
#ifndef PYTHON_INTERPRETER_H
#define PYTHON_INTERPRETER_H
 
#define PY_SSIZE_T_CLEAN
#include <Python.h>
 
#include <QObject>
#include <QFile>
 
#include <string>
 
#include <PythonAPI/WriteChannel.h>
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
class PythonInterpreter : public QObject, public WriteChannel
{
    Q_OBJECT
 
public:

     explicit PythonInterpreter(WriteChannel* outputChannel, 
         WriteChannel* errorChannel, bool printPromt = true,
         QObject* parent = nullptr);
 
     // ! The destructor.
    ~PythonInterpreter() final = default;

     bool initialize(bool interactive = true);     
     
    void finalize();

     void execute(std::string const& line);
 
signals:
    
    void executeDone();
 
public slots:

    virtual void write(QString const& command) override final;

    void executeString(QString const& string);

    int runFile(QString const& filePath);
 
private:

     bool redirectIO(bool interactive);

      bool setAPI();

     void printPrompt() const;
 
    //-----------------------------------------------------------------------------
    // Data.
    //-----------------------------------------------------------------------------

    std::string inputBuffer_{ };

    bool printPrompt_{ true };

    bool runMultiline_{ false };

    WriteChannel* outputChannel_{ nullptr };

    WriteChannel* errorChannel_{ nullptr };

    PyObject* globalContext_{ nullptr };

    PyObject* localContext_{ nullptr };

    PyThreadState* threadState_{ nullptr };
};
 
#endif // PYTHON_INTERPRETER_H