Setting custom x11 property on windows to disable dimming (anti-dim) on active...

Setting custom x11 property on windows to disable dimming (anti-dim) on active window with mod+Mod1+a for anti-dim model and mod+Mod1+d for dim mode.

compton/compton.conf

@@ -70,6 +70,7 @@ opacity-rule = [
 inactive-dim = 0.2;
 # exclude treats as always focused (doesn't dim)
 focus-exclude = [
+  "ANTIDIM_FLAG@:8c",
   "_NET_WM_STATE@:32a *= '_NET_WM_STATE_STICKY'",
   "class_g = 'Cairo-clock'"
 ];

i3/config

@@ -203,6 +203,10 @@ bindsym $mod+Mod1+Shift+x exec transset-df -a --inc 0.1 --max 0.99
 bindsym $mod+Mod1+Ctrl+x exec "WINDOWS=$(xdotool search --all --onlyvisible --desktop $(xprop -notype -root _NET_CURRENT_DESKTOP | cut -c 24-) \\"\\" 2>/dev/null); for window in $WINDOWS; do xdotool windowactivate $window; transset-df -a --inc 0.20 --max 0.99; done"
 bindsym $mod+Mod1+c exec --no-startup-id "pkill compton; compton -b"
 
+# window dimming enable or disable (uses xdotool and xprop to set a anti-dim flag, which compton recognises in focus-exclude array) 
+bindsym $mod+Mod1+a exec xprop -id $(xdotool getactivewindow) -f ANTIDIM_FLAG 8c -set ANTIDIM_FLAG 1; exec notify-send 'anti-dim set on window'
+bindsym $mod+Mod1+d exec xprop -id $(xdotool getactivewindow) -remove ANTIDIM_FLAG; exec notify-send 'dim set on window'
+
 # focus the parent container
 bindsym $mod+a focus parent
 bindsym $mod+Shift+a focus child