Add visualbell-patch

patches/st-visualbell-0.8.4.diff

@@ -0,0 +1,48 @@
+From b7f2e9e933710e3339b710e24e37c6f0b3befa34 Mon Sep 17 00:00:00 2001
+From: Matthias Schoth <mschoth@gmail.com>
+Date: Fri, 24 Jul 2020 23:55:31 +0200
+Subject: [PATCH] visualbell
+
+---
+ x.c | 11 ++++++++++-
+ 1 file changed, 10 insertions(+), 1 deletion(-)
+
+diff --git a/x.c b/x.c
+index 210f184..bcf61f1 100644
+--- a/x.c
++++ b/x.c
+@@ -259,6 +259,7 @@ static char *opt_name  = NULL;
+ static char *opt_title = NULL;
+ 
++static int bellon = 0;    /* visual bell status */
+ static uint buttons; /* bit field of pressed buttons */
+ 
+ void
+ clipcopy(const Arg *dummy)
+@@ -1713,6 +1714,8 @@ xbell(void)
+ 		xseturgency(1);
+ 	if (bellvolume)
+ 		XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
++	if (!bellon) /* turn visual bell on */
++		bellon = 1;
+ }
+ 
+ void
+@@ -1958,7 +1961,13 @@ run(void)
+ 			}
+ 		}
+ 
+-		draw();
++		if (bellon) {
++			bellon++;
++			bellon %= 3;
++			MODBIT(win.mode, !IS_SET(MODE_REVERSE), MODE_REVERSE);
++			redraw();
++		}
++		else draw();
+ 		XFlush(xw.dpy);
+ 		drawing = 0;
+ 	}
+-- 
+2.27.0
+

x.c

@@ -258,6 +258,7 @@ static char *opt_line  = NULL;
 static char *opt_name  = NULL;
 static char *opt_title = NULL;
 
+static int bellon = 0;    /* visual bell status */
 static uint buttons; /* bit field of pressed buttons */
 
 void
@@ -1890,6 +1891,8 @@ xbell(void)
 		xseturgency(1);
 	if (bellvolume)
 		XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
+	if (!bellon) /* turn visual bell on */
+		bellon = 1;
 }
 
 void
@@ -2135,7 +2138,13 @@ run(void)
 			}
 		}
 
-		draw();
+		if (bellon) {
+			bellon++;
+			bellon %= 3;
+			MODBIT(win.mode, !IS_SET(MODE_REVERSE), MODE_REVERSE);
+			redraw();
+		}
+		else draw();
 		XFlush(xw.dpy);
 		drawing = 0;
 	}