Add copy-mode-position-format to configure the position indicator.

options-table.c

@@ -971,6 +971,18 @@ const struct options_table_entry options_table[] = {
 	  .text = "Style of the marked line in copy mode."
 	},
 
+	{ .name = "copy-mode-position-format",
+	  .type = OPTIONS_TABLE_STRING,
+	  .scope = OPTIONS_TABLE_WINDOW|OPTIONS_TABLE_PANE,
+	  .default_str = "#[align=right]"
+	                 "#{t/p:top_line_time}#{?#{e|>:#{top_line_time},0}, ,}"
+	                 "[#{scroll_position}/#{history_size}]"
+	                 "#{?search_timed_out, (timed out),"
+	                 "#{?search_count, (#{search_count}"
+	                 "#{?search_count_partial,+,} results),}}",
+	  .text = "Format of the position indicator in copy mode."
+	},
+
 	{ .name = "fill-character",
 	  .type = OPTIONS_TABLE_STRING,
 	  .scope = OPTIONS_TABLE_WINDOW,

screen-write.c

@@ -567,9 +567,11 @@ screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src,
     u_int px, u_int py, u_int nx, u_int ny)
 {
 	struct screen		*s = ctx->s;
+	struct window_pane	*wp = ctx->wp;
+	struct tty_ctx	 	 ttyctx;
 	struct grid		*gd = src->grid;
 	struct grid_cell	 gc;
-	u_int		 	 xx, yy, cx, cy;
+	u_int		 	 xx, yy, cx = s->cx, cy = s->cy;
 
 	if (nx == 0 || ny == 0)
 		return;
@@ -578,18 +580,28 @@ screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src,
 	for (yy = py; yy < py + ny; yy++) {
 		if (yy >= gd->hsize + gd->sy)
 			break;
-		cx = s->cx;
+		s->cx = cx;
+		if (wp != NULL)
+			screen_write_initctx(ctx, &ttyctx, 0);
 		for (xx = px; xx < px + nx; xx++) {
 			if (xx >= grid_get_line(gd, yy)->cellsize)
 				break;
 			grid_get_cell(gd, xx, yy, &gc);
 			if (xx + gc.data.width > px + nx)
 				break;
-			grid_view_set_cell(ctx->s->grid, cx, cy, &gc);
+			grid_view_set_cell(ctx->s->grid, s->cx, s->cy, &gc);
-			cx++;
+			if (wp != NULL) {
+				ttyctx.cell = &gc;
+				tty_write(tty_cmd_cell, &ttyctx);
+				ttyctx.ocx++;
+			}
+			s->cx++;
 		}
-		cy++;
+		s->cy++;
 	}
+
+	s->cx = cx;
+	s->cy = cy;
 }
 
 /* Select character set for drawing border lines. */

tmux.1

@@ -4833,6 +4833,8 @@ see the
 .Sx STYLES
 section.
 .Pp
+.It Ic copy-mode-position-format Ar format
+Format of the position indicator in copy mode.
 .It Xo Ic mode-keys
 .Op Ic vi | emacs
 .Xc