From e8d24f818be5c3e4b9616ce310cc4cafeb1707b0 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Mon, 28 Jul 2025 09:29:31 +1000
Subject: [PATCH] util: add two macros for clearing a line

Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1280>
---
 src/util-macros.h             |  3 +++
 tools/libinput-debug-tablet.c | 14 +++++---------
 2 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/util-macros.h b/src/util-macros.h
index 8f7e32ac..268a15fe 100644
--- a/src/util-macros.h
+++ b/src/util-macros.h
@@ -98,6 +98,9 @@
 #define ANSI_RGB(r, g, b)       "\x1B[38;2;" #r  ";" #g ";" #b "m"
 #define ANSI_RGB_BG(r, g, b)    "\x1B[48;2;" #r  ";" #g ";" #b "m"
 
+#define ANSI_CLEAR_LINE         "\x1B[2K"
+#define ANSI_CLEAR_EOL          "\x1B[0K"
+
 #define CASE_RETURN_STRING(a) case a: return #a
 
 /**
diff --git a/tools/libinput-debug-tablet.c b/tools/libinput-debug-tablet.c
index c5089df0..0d478751 100644
--- a/tools/libinput-debug-tablet.c
+++ b/tools/libinput-debug-tablet.c
@@ -78,18 +78,14 @@ LIBINPUT_ATTRIBUTE_PRINTF(1, 2)
 static void
 print_line(const char *format, ...)
 {
-	char empty[] =
-		"                                                                                ";
-	const int width = 80;
-	int n;
+	char buf[256];
+
 	va_list args;
-
-	printf("\r");
-
 	va_start(args, format);
-	n = vprintf(format, args);
+	vsnprintf(buf, sizeof(buf), format, args);
 	va_end(args);
-	printf("%.*s\n", width - n, empty);
+
+	printf(ANSI_CLEAR_LINE "%s\n", buf);
 }
 
 static void