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Diffstat (limited to 'src/hci/tui/widget_ui.c')
-rw-r--r-- | src/hci/tui/widget_ui.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/hci/tui/widget_ui.c b/src/hci/tui/widget_ui.c new file mode 100644 index 0000000..5079eef --- /dev/null +++ b/src/hci/tui/widget_ui.c @@ -0,0 +1,143 @@ +/* + * Copyright (C) 2024 Michael Brown <mbrown@fensystems.co.uk>. + * + * This program 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 2 of the + * License, or any later version. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + * You can also choose to distribute this program under the terms of + * the Unmodified Binary Distribution Licence (as given in the file + * COPYING.UBDL), provided that you have satisfied its requirements. + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +/** @file + * + * Text widget UI + * + */ + +#include <errno.h> +#include <curses.h> +#include <ipxe/ansicol.h> +#include <ipxe/widget.h> + +/** + * Find editable widget in widget set + * + * @v widgets Text widget set + * @v index Editable widget index + * @ret widget Editable widget, or NULL + */ +static struct widget * find_widget ( struct widgets *widgets, + unsigned int index ) { + struct widget *widget; + + list_for_each_entry ( widget, &widgets->list, list ) { + if ( ! ( widget->flags & WIDGET_EDITABLE ) ) + continue; + if ( index-- == 0 ) + return widget; + } + return NULL; +} + +/** + * Text widget user interface main loop + * + * @v widgets Text widget set + * @ret rc Return status code + */ +static int widget_ui_loop ( struct widgets *widgets ) { + struct widget *widget; + unsigned int current; + unsigned int count; + int key; + + /* Draw all widgets */ + list_for_each_entry ( widget, &widgets->list, list ) + draw_widget ( widgets, widget ); + + /* Count editable widgets */ + count = 0; + while ( find_widget ( widgets, count ) != NULL ) + count++; + + /* Main loop */ + current = 0; + while ( 1 ) { + + /* Identify current widget */ + widget = find_widget ( widgets, current ); + if ( ! widget ) + return -ENOENT; + + /* Redraw current widget */ + draw_widget ( widgets, widget ); + + /* Process keypress */ + key = edit_widget ( widgets, widget, getkey ( 0 ) ); + switch ( key ) { + case KEY_UP: + if ( current > 0 ) + current--; + break; + case KEY_DOWN: + if ( ++current == count ) + current--; + break; + case TAB: + if ( ++current == count ) + current = 0; + break; + case KEY_ENTER: + current++; + if ( current >= count ) + return 0; + break; + case CTRL_C: + case ESC: + return -ECANCELED; + default: + /* Do nothing for unrecognised keys or edit errors */ + break; + } + } +} + +/** + * Present text widget user interface + * + * @v widgets Text widget set + * @ret rc Return status code + */ +int widget_ui ( struct widgets *widgets ) { + int rc; + + /* Initialise UI */ + initscr(); + start_color(); + color_set ( CPAIR_NORMAL, NULL ); + erase(); + + /* Run main loop */ + rc = widget_ui_loop ( widgets ); + + /* Terminate UI */ + color_set ( CPAIR_NORMAL, NULL ); + endwin(); + + return rc; +} |