Add a way to toggle the grayscale shader

.config/hypr/hyprland.conf

@@ -69,8 +69,6 @@ general {
 decoration {
     # See https://wiki.hyprland.org/Configuring/Variables/ for more
 
-		screen_shader = /home/daniele/.config/hypr/shaders/grayscale.frag
-
     rounding = 5
     
     blur {
@@ -133,9 +131,13 @@ misc {
 	force_default_wallpaper = 0
 	disable_hyprland_logo = 1
 }
+
 # Include windows rules
 source = ~/.config/hypr/windows_rules.conf
 
+# Include shaders config
+source = ~/.config/hypr/shaders/shader.conf
+
 # See https://wiki.hyprland.org/Configuring/Keywords/ for more
 $mainMod = SUPER
 

.config/hypr/shaders/shader.conf

@@ -0,0 +1,3 @@
+#decoration {
+# screen_shader = /home/daniele/.config/hypr/shaders/grayscale.frag
+#}

.config/hypr/shaders/toggle_shader

@@ -0,0 +1,10 @@
+# Check if the file exists
+if [ ! -f "$HOME/.config/hypr/shaders/shader_is_active" ]; then
+	# Activate shader
+	sed -Ei 's/^#([[:blank:]]*)/\1/' $HOME/.config/hypr/shaders/shader.conf
+	touch $HOME/.config/hypr/shaders/shader_is_active
+else
+  # Deactivate shader
+	sed -i 's/^[[:blank:]]*/#&/' $HOME/.config/hypr/shaders/shader.conf
+	rm $HOME/.config/hypr/shaders/shader_is_active
+fi