Add kanshi config

Dynamically manages outputs based on profiles.

kanshi/config

@@ -0,0 +1,10 @@
+profile external-dell {
+	output eDP-1 disable
+    # Dell P2416D, 23.8 inches, 123.41 PPI (see https://www.sven.de/dpi/)
+    # "make model serial" from `swaymsg -t get_outputs`
+    output "Dell Inc. DELL P2416D 6RC2C54O0NWS" mode 2560x1440 position 0,0 scale 1.75
+}
+
+profile internal {
+	output eDP-1 enable mode 2560x1440 scale 1.75 position 0,0
+}

sway/config

@@ -51,43 +51,8 @@ output * bg /usr/share/backgrounds/sway/Sway_Wallpaper_Blue_1920x1080.png fill
 #
 # You can get the names of your outputs by running: swaymsg -t get_outputs
 
-# eDP-1 is the internal laptop display
-output eDP-1 {
-    scale 2
-    resolution 2560x1440
-    position 0,0
-}
-
-# DP-1, DP-2, DP-3, and DP-4 are display port when connected to dock
-output DP-1 {
-    scale 2
-    resolution 2560x1440
-    position 1280,0
-}
-
-output DP-2 {
-    scale 2
-    resolution 2560x1440
-    position 1280,0
-}
-
-output DP-3 {
-    scale 2
-    resolution 2560x1440
-    position 1280,0
-}
-
-output DP-4 {
-    scale 2
-    resolution 2560x1440
-    position 1280,0
-}
-
-output HDMI-A-1 {
-    scale 1
-    resolution 1280x720
-    position 1280,0
-}
+# Manage outputs with kanshi
+exec_always pkill kanshi; exec kanshi
 
 # Wayland overlay bar for sound and brightness level
 exec mkfifo $SWAYSOCK.wob && tail -f $SWAYSOCK.wob | wob
@@ -123,6 +88,7 @@ exec swayidle \
 # Read `man 5 sway-input` for more information about this section.
 
 input type:touchpad {
+    # note that DWT only works for internal touchpads (see libinput issue #524)
     dwt enabled
     tap enabled
     natural_scroll enabled