////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2021-2022 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Octave is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#if ! defined (octave_command_widget_h)
#define octave_command_widget_h 1

#include <QWidget>

#include <Qsci/qsciscintilla.h>

// FIXME: We need the following header for the fcn_callback and
// meth_callback typedefs.  Maybe it would be better to declare those in
// a separate file because inclding "event-manager.h" pulls in a lot of
// other unnecessary declarations.
#include "event-manager.h"

class QsciScintilla;

OCTAVE_BEGIN_NAMESPACE(octave)

  class base_qobject;
  class command_widget;

  class console : public QsciScintilla
  {
    Q_OBJECT

  public:

    console (command_widget *p, base_qobject& oct_qobj);

  public slots:

    void cursor_position_changed (int line, int col);

    void text_changed (void);

    void move_cursor_to_end (void);

    void new_command_line (const QString& command = QString ());

    void execute_command (const QString& command);

  protected:

    void keyPressEvent (QKeyEvent *e);

  private:

    void append_string (const QString& string);

    void accept_command_line (void);

    int m_command_position;
    int m_cursor_position;
    bool m_text_changed;
    command_widget *m_command_widget;
    QString m_last_key_string;

  };

  class command_widget : public QWidget
  {
    Q_OBJECT

  public:

    command_widget (base_qobject& oct_qobj, QWidget *p);

    console * get_console ( ) { return m_console; };

    void init_command_prompt ();

    QString prompt (void);

  signals:

    void clear_line_edit (void);

    void interpreter_pause (void);
    void interpreter_resume (void);
    void interpreter_stop (void);

    void interpreter_event (const fcn_callback& fcn);
    void interpreter_event (const meth_callback& meth);

    void new_command_line_signal (const QString& command = QString ());

  public slots:

    void process_input_line (const QString& input_line);

    void update_prompt (const QString& prompt);

    void insert_interpreter_output (const QString& msg);

    void notice_settings (void);

  private:

    bool m_incomplete_parse;
    QString m_prompt;
    console *m_console;
  };

OCTAVE_END_NAMESPACE(octave)

#endif