Add example script to switch primary and secondary display applications

also don't run detect-second-display multiple times during a session.

roles/yavdr-desktop/tasks/main.yml

@@ -103,6 +103,14 @@
     owner: '{{ vdr.user }}'
     group: '{{ vdr.group }}'
 
+- name: create switch-displays script
+  template:
+    src: templates/bin/switch-displays.j2
+    dest: '{{ vdr.home }}/bin/switch-displays'
+    mode: 0755
+    owner: '{{ vdr.user }}'
+    group: '{{ vdr.group }}'
+
 - name: create openbox-second.service for the session
   template:
     src: templates/systemd/user/openbox-second.service.j2

roles/yavdr-desktop/templates/bin/switch-displays.j2

@@ -0,0 +1,9 @@
+#!/bin/bash
+source <(systemctl --user show-environment)
+[[ "$DISPLAY" =~ \.1$ ]] && DISPLAY="${DISPLAY%.1}.0" || DISPLAY="${DISPLAY%.0}.1"
+
+frontend-dbus-send stop
+systemctl --user stop osd2web
+frontend-dbus-send setDisplay "$DISPLAY"
+systemctl --user start osd2web
+frontend-dbus-send start

roles/yavdr-desktop/templates/systemd/user/detect-second-display.service.j2

@@ -3,6 +3,7 @@ Description=Detect second DISPLAY using xrandr
 
 [Service]
 Type=oneshot
+RemainAfterExit=yes
 ExecStart=%h/bin/detect-second-display
 
 [Install]