From 4212fb6488578e332a5f3cad2819beedb0ff7ae5 Mon Sep 17 00:00:00 2001
From: Orestis Floros <orestisflo@gmail.com>
Date: Tue, 14 Apr 2020 20:46:49 +0200
Subject: [PATCH] i3bar: Set WM_CLASS instance to bar_id

---
 i3bar/src/xcb.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/i3bar/src/xcb.c b/i3bar/src/xcb.c
index 06cff98d..ae447fbc 100644
--- a/i3bar/src/xcb.c
+++ b/i3bar/src/xcb.c
@@ -1816,6 +1816,8 @@ void reconfig_windows(bool redraw_bars) {
                                                                       bar_height);
 
             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
+            char *class;
+            int len = sasprintf(&class, "%s%ci3bar%c", config.bar_id, 0, 0);
             xcb_void_cookie_t class_cookie;
             class_cookie = xcb_change_property(xcb_connection,
                                                XCB_PROP_MODE_REPLACE,
@@ -1823,8 +1825,8 @@ void reconfig_windows(bool redraw_bars) {
                                                XCB_ATOM_WM_CLASS,
                                                XCB_ATOM_STRING,
                                                8,
-                                               (strlen("i3bar") + 1) * 2,
-                                               "i3bar\0i3bar\0");
+                                               len,
+                                               class);
 
             char *name;
             sasprintf(&name, "i3bar for output %s", walk->name);