From 3c5363dd7a50219d76f8be3c1e3282cd420a0447 Mon Sep 17 00:00:00 2001
From: salmonik <raisersoft@proton.me>
Date: Fri, 6 Feb 2026 22:17:01 +0100
Subject: apply visualbell2 patches - basic and enhanced

---
 config.def.h | 19 +++++++++++++++++++
 config.h     | 19 +++++++++++++++++++
 x.c          | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 92 insertions(+)

diff --git a/config.def.h b/config.def.h
index 375c248..e358fba 100644
--- a/config.def.h
+++ b/config.def.h
@@ -73,6 +73,25 @@ static unsigned int cursorthickness = 2;
  */
 static int bellvolume = 0;
 
+/* visual-bell timeout in ms (0 to disable visual-bell) */
+static int vbelltimeout = 150;
+
+/* choose predefined visual-bell cells to inverse, or define your own logic */
+#define VBCELL x==0 || x==right || y==0 || y==bottom  /* border */
+// #define VBCELL 1  /* all cells - whole screen */
+// #define VBCELL y==bottom && x>right-2  /* bottom-right */
+
+static int vbellmode = 1;
+/* vbellmode: 0: invert cells. 1: draw a circle with these parameters:
+ * - base and outline colors (colorname index - see below)
+ * - radius: relative to window width, or if negative: relative to cell-width
+ * - position: relative to window width/height (0 and 1 are at the edges) */
+static int vbellcolor = 3;
+static int vbellcolor_outline = 1;
+static float vbellradius = 0.03;
+static float vbellx = 0.5;
+static float vbelly = 0.5;
+
 /* default TERM value */
 char *termname = "st-256color";
 
diff --git a/config.h b/config.h
index a860986..b47e954 100644
--- a/config.h
+++ b/config.h
@@ -73,6 +73,25 @@ static unsigned int cursorthickness = 2;
  */
 static int bellvolume = 0;
 
+/* visual-bell timeout in ms (0 to disable visual-bell) */
+static int vbelltimeout = 150;
+
+/* choose predefined visual-bell cells to inverse, or define your own logic */
+#define VBCELL x==0 || x==right || y==0 || y==bottom  /* border */
+// #define VBCELL 1  /* all cells - whole screen */
+// #define VBCELL y==bottom && x>right-2  /* bottom-right */
+
+static int vbellmode = 1;
+/* vbellmode: 0: invert cells. 1: draw a circle with these parameters:
+ * - base and outline colors (colorname index - see below)
+ * - radius: relative to window width, or if negative: relative to cell-width
+ * - position: relative to window width/height (0 and 1 are at the edges) */
+static int vbellcolor = 3;
+static int vbellcolor_outline = 1;
+static float vbellradius = 0.03;
+static float vbellx = 0.5;
+static float vbelly = 0.5;
+
 /* default TERM value */
 char *termname = "st-256color";
 
diff --git a/x.c b/x.c
index 1f2becf..8c9a74e 100644
--- a/x.c
+++ b/x.c
@@ -1674,6 +1674,43 @@ xsettitle(char *p)
 	XFree(prop.value);
 }
 
+
+static int vbellset = 0; /* 1 during visual bell, 0 otherwise */
+static struct timespec lastvbell = {0};
+
+static int
+isvbellcell(int x, int y)
+{
+	int right = win.tw / win.cw - 1, bottom = win.th / win.ch - 1;
+	return vbellmode == 0 && (VBCELL);  /* logic defined at config.h */
+}
+
+static void
+vbellbegin() {
+	clock_gettime(CLOCK_MONOTONIC, &lastvbell);
+	if (vbellset)
+		return;
+	vbellset = 1;
+	redraw();
+	XFlush(xw.dpy);
+}
+
+static void
+xfillcircle(int x, int y, int r, uint color_ix)
+{
+	XSetForeground(xw.dpy, dc.gc, dc.col[color_ix].pixel);
+	XFillArc(xw.dpy, xw.buf, dc.gc, x - r, y - r, r * 2, r * 2, 0, 360*64);
+}
+
+static void
+xdrawvbell() {
+	int r = round(vbellradius * (vbellradius > 0 ? win.w : -win.cw));
+	int x = borderpx + r + vbellx * (win.tw - 2 * r);
+	int y = borderpx + r + vbelly * (win.th - 2 * r);
+	xfillcircle(x, y, r, vbellcolor_outline);
+	xfillcircle(x, y, r / 1.2, vbellcolor); /* 1.2 - an artistic choice */
+}
+
 int
 xstartdraw(void)
 {
@@ -1695,6 +1732,8 @@ xdrawline(Line line, int x1, int y1, int x2)
 			continue;
 		if (selected(x, y1))
 			new.mode ^= ATTR_REVERSE;
+		if (vbellset && isvbellcell(x, y1))
+			new.mode ^= ATTR_REVERSE;
 		if (i > 0 && ATTRCMP(base, new)) {
 			xdrawglyphfontspecs(specs, base, i, ox, y1);
 			specs += i;
@@ -1714,6 +1753,9 @@ xdrawline(Line line, int x1, int y1, int x2)
 void
 xfinishdraw(void)
 {
+	if (vbellset && vbellmode == 1)
+		xdrawvbell();
+
 	XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
 			win.h, 0, 0);
 	XSetForeground(xw.dpy, dc.gc,
@@ -1798,6 +1840,8 @@ xbell(void)
 		xseturgency(1);
 	if (bellvolume)
 		XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
+	if (vbelltimeout)
+		vbellbegin();
 }
 
 void
@@ -2062,6 +2106,16 @@ run(void)
 			}
 		}
 
+		if (vbellset) {
+			double remain = vbelltimeout - TIMEDIFF(now, lastvbell);
+			if (remain <= 0) {
+				vbellset = 0;
+				redraw();
+			} else if (timeout < 0 || remain < timeout) {
+				timeout = remain;
+			}
+		}
+
 		draw();
 		XFlush(xw.dpy);
 		drawing = 0;
-- 
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