Add XFCE Support.

  * Check if XDG_CURRENT_DESKTOP is set to XFCE.
  * Use xfce4-session-logout as logout/reboot/shutdown prompt.
  * Use xfce4-settings-manager for 'Settings...'.
  * Use xflock4 to attept a session lock.
  * Use xfce4-about for info about this computer (not fully
    appropriate but XFCE does not have any appropriate equivalent
    as found in GNOME or MATE).

Fixes AyatanaIndicators/ayatana-indicator-session#1.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/utils.c b/src/utils.c
index 4bc6d68..dad9354 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -79,6 +79,27 @@ is_mate ()
   return FALSE;
 }
 
+gboolean
+is_xfce ()
+{
+  const gchar *xdg_current_desktop;
+  gchar **desktop_names;
+  int i;
+
+  xdg_current_desktop = g_getenv ("XDG_CURRENT_DESKTOP");
+  if (xdg_current_desktop != NULL) {
+    desktop_names = g_strsplit (xdg_current_desktop, ":", 0);
+    for (i = 0; desktop_names[i]; ++i) {
+      if (!g_strcmp0 (desktop_names[i], "XFCE")) {
+        g_strfreev (desktop_names);
+        return TRUE;
+      }
+    }
+    g_strfreev (desktop_names);
+  }
+  return FALSE;
+}
+
 GHashTable*
 get_os_release (void)
 {