Add blur and make dotfiles more flexible

Add blur using the fork from https://github.com/tryone144/compton.
picom seems to be very CPU heavy on my system, so until I figure out how
to fix that I will use this outdated version.
Make the dotfiles a bit more flexible by creating symlinks for stuff
like the wallpaper or the compositor. When switching/exchanging these
components only the symlinks have to be updated.

.config/compositor

@@ -0,0 +1 @@
+./compton

.config/compton/compton.conf

@@ -0,0 +1,4 @@
+backend = "glx";
+blur-method = "kawase";
+blur-strength = 6;
+blur-background = true;

.config/compton/launch.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ "$1" = "-k" ];  then
+	killall -q compton
+elif ! pgrep -ax compton >/dev/null 2>&1; then
+	compton --config "${XDG_CONFIG_HOME:-$HOME/.config}/compton/compton.conf" -b
+fi

.config/i3/config

@@ -201,13 +201,13 @@ bindsym $mod+p exec ~/.config/rofi/powermenu.sh &
 exec --no-startup-id xss-lock -l ~/.config/xsecurelock/transfer-sleep-lock.sh &
 
 # Wallpaper
-exec feh --bg-scale --no-fehbg ~/Pictures/Wallpapers/tractor-blur.png
+exec_always feh --bg-scale --no-fehbg ~/Pictures/Wallpapers/wallpaper
 
 # Notify when toggling airplane mode
 bindsym XF86RFKill exec --no-startup-id ~/.config/i3/airplane-mode-notify.sh
 
-# compositor for transparency
-exec --no-startup-id compton -b
+# compositor for transparency and blur
+exec --no-startup-id ~/.config/compositor/launch.sh
 
 # scratchpad-terminal
 for_window [class="st-256color" title="^scratchpad-terminal$"] \

.config/xsecurelock/transfer-sleep-lock.sh

@@ -20,14 +20,14 @@ sleep_delay=1
 # Run before starting the locker
 pre_lock() {
     playerctl pause
-    killall -q compton
+    "${XDG_CONFIG_HOME:-$HOME/.config}/compositor/launch.sh" -k
     amixer -q -D pulse sset Master mute
     return
 }
 
 # Run after the locker exits
 post_lock() {
-    compton -b
+    "${XDG_CONFIG_HOME:-$HOME/.config}/compositor/launch.sh"
     return
 }