PythonRepl.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include <QMainWindow>
 
#include <string>
 
#include "PythonInterpreter.h"
 
class PythonInterpreter;
class Ui_PythonREPL;
class QPlainTextEdit;
 
class PythonRepl;
 
class History final
{
  public:
    explicit History() = default;
 
    void add(QString &&cmd);
 
    size_t size() const;
 
    bool empty() const;
 
    const QString &older();
 
    const QString &newer();
 
  private:
    QVector<QString> m_commands;
    QVector<QString>::const_reverse_iterator m_current;
};
 
class KeyPressEater final : public QObject
{
    Q_OBJECT
  public:
    explicit KeyPressEater(PythonRepl *repl, QObject *parent = nullptr);
 
  protected:
    bool eventFilter(QObject *obj, QEvent *event) override;
 
  private:
    PythonRepl *m_repl{nullptr};
};
 
class PythonRepl final : public QMainWindow
{
    friend KeyPressEater;
    Q_OBJECT
 
  public:
    explicit PythonRepl(PythonInterpreter *interpreter, QMainWindow *parent = nullptr);
 
    void executeCode(const QString &pythonCode);
 
    PythonRepl(const PythonRepl &) = delete;
    PythonRepl(PythonRepl &&) = delete;
    PythonRepl &operator=(const PythonRepl &) = delete;
    PythonRepl &operator=(PythonRepl &&) = delete;
    ~PythonRepl() noexcept override;
 
  protected:
    QPlainTextEdit *codeEdit();
    QListWidget *outputDisplay();
 
    void reset();
    void importNeededPackages();
    void setupUI();
 
  private:
    History m_history{};
    std::string m_buf;
    Ui_PythonREPL *m_ui{nullptr};
    PythonInterpreter *m_interpreter{nullptr};
    PythonInterpreter::State m_state;
};