sxmo: ship a custom inputhandler

hosts/modules/gui/sxmo/default.nix

@@ -107,6 +107,7 @@ in
       type = types.attrsOf types.path;
       default = {
         "sxmo_hook_start.sh" = ./hooks/sxmo_hook_start.sh;
+        "sxmo_hook_inputhandler.sh" = ./hooks/sxmo_hook_inputhandler.sh;
       };
       description = ''
         extra hooks to add with higher priority than the builtins

hosts/modules/gui/sxmo/hooks/sxmo_hook_inputhandler.sh

@@ -0,0 +1,115 @@
+#!/bin/sh
+
+# increments to use for volume adjustment
+VOL_INCR_1=5
+VOL_INCR_2=10
+VOL_INCR_3=15
+
+# replicating the naming from upstream sxmo_hook_inputhandler.sh...
+ACTION="$1"
+STATE=$(cat "$SXMO_STATE")
+
+
+handle_with() {
+  echo "sxmo_hook_inputhandler.sh: STATE=$STATE ACTION=$ACTION: handle_with: $@"
+  "$@"
+  exit 0
+}
+
+# handle_with_state_toggle() {
+#   # - unlock,lock => screenoff
+#   # - screenoff => unlock
+#   #
+#   # probably not handling proximity* correctly here
+#   case "$STATE" in
+#     *lock)
+#       respond_with sxmo_state_switch.sh set screenoff
+#     *)
+#       respond_with sxmo_state_switch.sh set unlock
+#   esac
+# }
+
+# state is one of:
+# - "unlock" => normal operation; display on and touchscreen on
+# - "screenoff" => display off and touchscreen off
+# - "lock" => display on but touchscreen disabled
+# - "proximity{lock,unlock}" => intended for when in a phone call
+
+case "$STATE" in
+  "unlock")
+    case "$ACTION" in
+      # powerbutton_one: intentional default to no-op
+      # powerbutton_two: intentional default to screenoff
+      "powerbutton_three")
+        # power thrice: kill active window
+        handle_with sxmo_killwindow.sh
+        ;;
+
+      "volup_one")
+        # volume up once: app-specific menu w/ fallback to SXMO system menu
+        handle_with sxmo_appmenu.sh
+        ;;
+      # volup_two: intentionally defaulted for volume control
+      "volup_three")
+        # volume up thrice: DE menu
+        handle_with sxmo_wmmenu.sh
+        ;;
+
+      "voldown_one")
+        # volume down once: toggle keyboard
+        handle_with sxmo_keyboard.sh toggle
+        ;;
+      # voldown_two: intentionally defaulted for volume control
+      "voldown_three")
+        # volume down thrice: launch terminal
+        handle_with sxmo_terminal.sh
+        ;;
+    esac
+    ;;
+
+  "lock"|"screenoff")
+    case "$ACTION" in
+      "powerbutton_two")
+        # power twice => toggle media player
+        handle_with playerctl play-pause
+        ;;
+    esac
+    ;;
+
+  *)
+    # default actions
+    case "$ACTION" in
+      "powerbutton_one")
+        # power once => unlock
+        handle_with sxmo_state_switch.sh set unlock
+        ;;
+      "powerbutton_two")
+        # power twice => screenoff
+        handle_with sxmo_state_switch.sh set screenoff
+        ;;
+      # powerbutton_three: intentional no-op because overloading the kill-window handler is risky
+
+      "volup_one")
+        handle_with sxmo_audio.sh vol up "$VOL_INCR_1"
+        ;;
+      "volup_two")
+        handle_with sxmo_audio.sh vol up "$VOL_INCR_2"
+        ;;
+      "volup_three")
+        handle_with sxmo_audio.sh vol up "$VOL_INCR_3"
+        ;;
+
+      "voldown_one")
+        handle_with sxmo_audio.sh vol down "$VOL_INCR_1"
+        ;;
+      "voldown_two")
+        handle_with sxmo_audio.sh vol down "$VOL_INCR_2"
+        ;;
+      "voldown_three")
+        handle_with sxmo_audio.sh vol down "$VOL_INCR_3"
+        ;;
+    esac
+    ;;
+esac
+
+handle_with echo "no-op"