libinput: Install org.kde.kwin.InputDevice.xml exposing libinput/device.h

It allows to more comfortably create tooling that implements it.

KWinDBusInterfaceConfig.cmake.in

@@ -5,4 +5,5 @@ set(KWIN_COMPOSITING_INTERFACE "@PACKAGE_KDE_INSTALL_DBUSINTERFACEDIR@/org.kde.k
 set(KWIN_EFFECTS_INTERFACE "@PACKAGE_KDE_INSTALL_DBUSINTERFACEDIR@/org.kde.kwin.Effects.xml")
 set(KWIN_VIRTUALKEYBOARD_INTERFACE "@PACKAGE_KDE_INSTALL_DBUSINTERFACEDIR@/org.kde.kwin.VirtualKeyboard.xml")
 set(KWIN_TABLETMODE_INTERFACE "@PACKAGE_KDE_INSTALL_DBUSINTERFACEDIR@/org.kde.KWin.TabletModeManager.xml")
+set(KWIN_INPUTDEVICE_INTERFACE "@PACKAGE_KDE_INSTALL_DBUSINTERFACEDIR@/org.kde.kwin.InputDevice.xml")
 set(KWIN_WAYLAND_BIN_PATH "@CMAKE_INSTALL_FULL_BINDIR@/kwin_wayland")

src/backends/libinput/CMakeLists.txt

@@ -1,3 +1,19 @@
+qt5_generate_dbus_interface(device.h org.kde.kwin.InputDevice.xml OPTIONS -A)
+
+add_custom_target(
+    KWinInputDBusInterfaces
+    ALL
+    DEPENDS
+        ${CMAKE_CURRENT_BINARY_DIR}/org.kde.kwin.InputDevice.xml
+)
+
+install(
+    FILES
+        ${CMAKE_CURRENT_BINARY_DIR}/org.kde.kwin.InputDevice.xml
+    DESTINATION
+        ${KDE_INSTALL_DBUSINTERFACEDIR}
+)
+
 target_sources(kwin PRIVATE
     connection.cpp
     context.cpp