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;
+}