////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2011-2021 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_files_dock_widget_h)
#define octave_files_dock_widget_h 1

#include <QAction>
#include <QComboBox>
#include <QDate>
#include <QFileSystemModel>
#include <QList>
#include <QListView>
#include <QListWidget>
#include <QMouseEvent>
#include <QObject>
#include <QSignalMapper>
#include <QToolBar>
#include <QToolButton>
#include <QTreeView>
#include <QVBoxLayout>
#include <QWidget>

#include "octave-dock-widget.h"

class octave_value_list;

namespace octave
{
  class base_qobject;

  //!  Dock widget to display files in the current directory.

  class files_dock_widget : public octave_dock_widget
  {
    Q_OBJECT

  public:

    files_dock_widget (QWidget *parent, base_qobject& oct_qobj);

    ~files_dock_widget (void) = default;

  signals:

    //! Emitted, whenever the user requested to open a file.

    void open_file (const QString& fileName);

    //! Emitted, whenever the currently displayed directory changed.

    void displayed_directory_changed (const QString& dir);

    //! Emitted, whenever the user requested to load a file in the text editor.

    void load_file_signal (const QString& fileName);

    //! Emitted, whenever the user requested to open an unknown type file.

    void open_any_signal (const QString& fileName);

    //! Emitted, whenever the user requested to run a file.

    void run_file_signal (const QFileInfo& info);

    //! Emitted, whenever wants to search for a file .

    void find_files_signal (const QString& startdir);

    //! Emitted, whenever the user removes or renames a file.

    void file_remove_signal (const QString& old_name, const QString& new_name);

    //! Emitted, when a file or directory is renamed.

    void file_renamed_signal (bool);

    //! Emitted, when the path has to be modified

    void modify_path_signal (const octave_value_list& dir_list,
                             bool rm, bool subdirs);

  public slots:

    //! Slot for handling a change in directory via double click.

    void item_double_clicked (const QModelIndex & index);

    //! Slot for handling the up-directory button in the toolbar.

    void change_directory_up (void);

    //! Slot for handling the sync octave directory button in the toolbar.

    void do_sync_octave_directory (void);

    //! Slot for handling the sync browser directory button in the toolbar.

    void do_sync_browser_directory (void);

    //! Sets the current directory being displayed.

    void set_current_directory (const QString& dir);

    //! Accepts user input a the line edit for the current directory.

    void accept_directory_line_edit (void);

    //! Set the internal variable that holds the actual octave variable.

    void update_octave_directory (const QString& dir);

    //! Tells the widget to react on changed settings.

    void notice_settings (const gui_settings *settings);

    void save_settings (void);

  private slots:

    void headercontextmenu_requested (const QPoint& pos);
    void toggle_header (int col);

    //! Context menu wanted.

    void contextmenu_requested (const QPoint& pos);

    //! Context menu actions.
    //!@{
    void contextmenu_open (bool);
    void contextmenu_open_in_editor (bool);
    void contextmenu_open_in_app (bool);
    void contextmenu_copy_selection (bool);
    void contextmenu_run (bool);
    void contextmenu_load (bool);
    void contextmenu_rename (bool);
    void contextmenu_delete (bool);
    void contextmenu_newfile (bool);
    void contextmenu_newdir (bool);
    void contextmenu_setcurrentdir (bool);
    void contextmenu_add_to_path (bool, bool rm=false, bool subdirs=false);
    void contextmenu_add_to_path_subdirs (bool);
    void contextmenu_rm_from_path (bool);
    void contextmenu_rm_from_path_subdirs (bool);
    void contextmenu_findfiles (bool);
    //!@}

    //! Popdown menu options.
    //!@{
    void popdownmenu_newfile (bool);
    void popdownmenu_newdir (bool);
    void popdownmenu_search_dir (bool);
    void popdownmenu_findfiles (bool);
    void popdownmenu_home (bool);
    //!@}

    //! Inherited from octave_doc_widget.
    //!@{
    void copyClipboard ();
    void pasteClipboard ();
    void selectAll ();
    //!@}

  private:

    //! Get currently selected QFileInfo object.

    QList<QFileInfo> get_selected_items_info (bool);

    //! Process new file/directory actions

    void process_new_file (const QString& parent_name);
    void process_new_dir (const QString& parent_name);

    //! Process setting current dir or find in files

    void process_set_current_dir (const QString& parent_name);
    void process_find_files (const QString& dir_name);

    //! set a new directory or open a file

    void display_directory (const QString& dir, bool set_octave_dir = true);

    void open_item_in_app (const QModelIndex& index);

    //! Variables for the actions

    QToolBar *m_navigation_tool_bar;
    QAction *m_sync_octave_directory_action;
    QAction *m_sync_browser_directory_action;

    //! The file system model.

    QFileSystemModel *m_file_system_model;

    //! The file system view.
    //!@{
    QTreeView *m_file_tree_view;
    QComboBox *m_current_directory;
    //!@}

    //! Flag if syncing with Octave.

    bool m_sync_octave_dir;

    //! The actual Octave directory.

    QString m_octave_dir;

    enum { MaxMRUDirs = 10 };

    QStringList m_columns_shown;
    QStringList m_columns_shown_keys;
    QList <QVariant> m_columns_shown_defs;
    QSignalMapper *m_sig_mapper;
  };
}

#endif
