[hci] Split out msg() and alert() from settings UI code

The msg() and alert() functions currently defined in settings_ui.c
provide a general-purpose facility for printing messages centred on
the screen.

Split this out to a separate file to allow for reuse by the form
presentation code.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 109 insertions, 0 deletions

diff --git a/src/hci/tui/message.c b/src/hci/tui/message.c
new file mode 100644
index 000000000..e3331d655
--- /dev/null
+++ b/src/hci/tui/message.c
@@ -0,0 +1,109 @@
+/*
+ * 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
+ *
+ * Message printing
+ *
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <ipxe/ansicol.h>
+#include <ipxe/message.h>
+
+/**
+ * Print message centred on specified row
+ *
+ * @v row		Row
+ * @v fmt		printf() format string
+ * @v args		printf() argument list
+ */
+static void vmsg ( unsigned int row, const char *fmt, va_list args ) {
+	char buf[COLS];
+	size_t len;
+
+	len = vsnprintf ( buf, sizeof ( buf ), fmt, args );
+	mvprintw ( row, ( ( COLS - len ) / 2 ), "%s", buf );
+}
+
+/**
+ * Print message centred on specified row
+ *
+ * @v row		Row
+ * @v fmt		printf() format string
+ * @v ..		printf() arguments
+ */
+void msg ( unsigned int row, const char *fmt, ... ) {
+	va_list args;
+
+	va_start ( args, fmt );
+	vmsg ( row, fmt, args );
+	va_end ( args );
+}
+
+/**
+ * Clear message on specified row
+ *
+ * @v row		Row
+ */
+void clearmsg ( unsigned int row ) {
+	move ( row, 0 );
+	clrtoeol();
+}
+
+/**
+ * Show alert message
+ *
+ * @v row		Row
+ * @v fmt		printf() format string
+ * @v args		printf() argument list
+ */
+static void valert ( unsigned int row, const char *fmt, va_list args ) {
+
+	clearmsg ( row );
+	color_set ( CPAIR_ALERT, NULL );
+	vmsg ( row, fmt, args );
+	sleep ( 2 );
+	color_set ( CPAIR_NORMAL, NULL );
+	clearmsg ( row );
+}
+
+/**
+ * Show alert message
+ *
+ * @v row		Row
+ * @v fmt		printf() format string
+ * @v ...		printf() arguments
+ */
+void alert ( unsigned int row, const char *fmt, ... ) {
+	va_list args;
+
+	va_start ( args, fmt );
+	valert ( row, fmt, args );
+	va_end ( args );
+}