sway: add screenshot keybinds

config

@@ -1,5 +1,5 @@
 # Default config for sway
-# vim: ft=i3config
+# vim: ft=i3
 #
 # Copy this to ~/.config/sway/config and edit it to your liking.
 #
@@ -146,6 +146,15 @@ bindsym $mod+space focus mode_toggle
 
 # Move focus to the parent container
 bindsym $mod+a focus parent
+#
+## Screenshot
+# needs grim, slurp and wl-clipboard packages
+#
+# copy selection to clipboard
+bindsym Print exec grim -g "$(slurp)" - | wl-copy
+# save selection
+bindsym $mod+Print exec grim -g "$(slurp)" \
+    $(xdg-user-dir PICTURES)/screenshot_$(date +'%Y%m%d_%H%M%S').png
 
 #
 # Gaps