Re-added visualbell patch

README.md

@@ -15,6 +15,8 @@ Refer to [https://st.suckless.org/](https://st.suckless.org/) for details on the
 
 ### Changelog:
 
+2020-08-08 - Re-added the visualbell patch
+
 2020-06-26 - Added the single drawable buffer patch as per the FAQ in order to get w3m images to display
 
 2020-06-25 - Upgrade to 0.8.4 (367803, 2020-06-19)
@@ -135,8 +137,8 @@ Refer to [https://st.suckless.org/](https://st.suckless.org/) for details on the
    - [vertcenter](https://st.suckless.org/patches/vertcenter/)
       - vertically center lines in the space available if you have set a larger chscale in config.h
 
-   - [~visualbell~](https://st.suckless.org/patches/visualbell/)
-      - ~adds visual indicators for the terminal bell event~
+   - [visualbell](https://st.suckless.org/patches/visualbell/)
+      - adds visual indicators for the terminal bell event
 
    - [w3m](https://st.suckless.org/patches/w3m/)
       - adds support for w3m images

patches.def.h

@@ -210,6 +210,11 @@
  */
 #define VERTCENTER_PATCH 0
 
+/* Briefly inverts window content on terminal bell event.
+ * https://st.suckless.org/patches/visualbell/
+ */
+#define VISUALBELL_1_PATCH 0
+
 /* Adds support for w3m images.
  * https://st.suckless.org/patches/w3m/
  */

x.c

@@ -289,6 +289,9 @@ static char *opt_dir   = NULL;
 #endif // WORKINGDIR_PATCH
 
 static int oldbutton = 3; /* button event on startup: 3 = release */
+#if VISUALBELL_1_PATCH
+static int bellon = 0;    /* visual bell status */
+#endif // VISUALBELL_1_PATCH
 
 #include "patch/x_include.c"
 
@@ -2103,6 +2106,10 @@ xbell(void)
 		xseturgency(1);
 	if (bellvolume)
 		XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
+	#if VISUALBELL_1_PATCH
+	if (!bellon) /* turn visual bell on */
+		bellon = 1;
+	#endif // VISUALBELL_1_PATCH
 }
 
 void
@@ -2387,7 +2394,18 @@ run(void)
 			}
 		}
 
+		#if VISUALBELL_1_PATCH
+		if (bellon) {
+			bellon++;
+			bellon %= 3;
+			MODBIT(win.mode, !IS_SET(MODE_REVERSE), MODE_REVERSE);
+			redraw();
+		}
+		else
+			draw();
+		#else
 		draw();
+		#endif // VISUALBELL_1_PATCH
 		XFlush(xw.dpy);
 		drawing = 0;
 	}