Add org.mate.SessionManager support

This is valid for Mate <= 1.10
(As of writing, 1.10 is the current stable release - so we'll have
 to keep shipping this for quite a few years to come.)

Change-Id: I4d1f81c50923148e710eac22f5428b2a1c41f0e9

vcl/inc/unx/screensaverinhibitor.hxx

@@ -33,6 +33,7 @@ private:
     boost::optional<guint> mnFDOCookie; // FDO ScreenSaver Inhibit
     boost::optional<guint> mnFDOPMCookie; // FDO PowerManagement Inhibit
     boost::optional<guint> mnGSMCookie;
+    boost::optional<guint> mnMSMCookie;
 
     boost::optional<int> mnXScreenSaverTimeout;
 
@@ -53,11 +54,14 @@ private:
     // FDOPM: org.freedesktop.PowerManagement.Inhibit::Inhibit - XFCE, (KDE) ?
     //        (KDE: doesn't inhibit screensaver, but does inhibit PowerManagement)
     // GSM: org.gnome.SessionManager::Inhibit - gnome 3
+    // MSM: org.mate.Sessionmanager::Inhibit - Mate <= 1.10, is identical to GSM
+    //       (This is replaced by the GSM interface from Mate 1.12 onwards)
     //
     // Note: the Uninhibit call has different spelling in FDO (UnInhibit) vs GSM (Uninhibit)
     void inhibitFDO( bool bInhibit, const gchar* appname, const gchar* reason );
     void inhibitFDOPM( bool bInhibit, const gchar* appname, const gchar* reason );
     void inhibitGSM( bool bInhibit, const gchar* appname, const gchar* reason, const guint xid );
+    void inhibitMSM( bool bInhibit, const gchar* appname, const gchar* reason, const guint xid );
 
     void inhibitXScreenSaver( bool bInhibit, Display* pDisplay );
     static void inhibitXAutoLock( bool bInhibit, Display* pDisplay );

vcl/unx/generic/window/screensaverinhibitor.cxx

@@ -29,6 +29,11 @@
 #define GSM_DBUS_SERVICE        "org.gnome.SessionManager"
 #define GSM_DBUS_PATH           "/org/gnome/SessionManager"
 #define GSM_DBUS_INTERFACE      "org.gnome.SessionManager"
+
+// Mate <= 1.10 uses org.mate.SessionManager, > 1.10 will use org.gnome.SessionManager
+#define MSM_DBUS_SERVICE        "org.mate.SessionManager"
+#define MSM_DBUS_PATH           "/org/mate/SessionManager"
+#define MSM_DBUS_INTERFACE      "org.mate.SessionManager"
 #endif
 
 #include <sal/log.hxx>
@@ -54,6 +59,7 @@ void ScreenSaverInhibitor::inhibit( bool bInhibit, const OUString& sReason,
         if ( xid != boost::none )
         {
             inhibitGSM( bInhibit, appname, aReason.getStr(), xid.get() );
+            inhibitMSM( bInhibit, appname, aReason.getStr(), xid.get() );
         }
     }
 }
@@ -198,6 +204,31 @@ void ScreenSaverInhibitor::inhibitGSM( bool bInhibit, const gchar* appname, cons
                  mnGSMCookie );
 }
 
+void ScreenSaverInhibitor::inhibitMSM( bool bInhibit, const gchar* appname, const gchar* reason, const guint xid )
+{
+    dbusInhibit( bInhibit,
+                 MSM_DBUS_SERVICE, MSM_DBUS_PATH, MSM_DBUS_INTERFACE,
+                 [appname, reason, xid] ( DBusGProxy *proxy, guint& nCookie, GError*& error ) -> bool {
+                     return dbus_g_proxy_call( proxy,
+                                               "Inhibit", &error,
+                                               G_TYPE_STRING, appname,
+                                               G_TYPE_UINT, xid,
+                                               G_TYPE_STRING, reason,
+                                               G_TYPE_UINT, 8, //Inhibit the session being marked as idle
+                                               G_TYPE_INVALID,
+                                               G_TYPE_UINT, &nCookie,
+                                               G_TYPE_INVALID );
+                 },
+                 [] ( DBusGProxy *proxy, const guint nCookie, GError*& error ) -> bool {
+                     return dbus_g_proxy_call( proxy,
+                                               "Uninhibit", &error,
+                                               G_TYPE_UINT, nCookie,
+                                               G_TYPE_INVALID,
+                                               G_TYPE_INVALID );
+                 },
+                 mnMSMCookie );
+}
+
 /**
  * Disable screensavers using the XSetScreenSaver/XGetScreenSaver API.
  *