fdo#46990 - detect MATE and XFCE desktops.

Change-Id: Id72860fc2e7d6b40f4fcb96b8f504a4f86a335b1

vcl/inc/unx/desktops.hxx

@@ -24,6 +24,8 @@ enum DesktopType {
     DESKTOP_NONE, // headless, i.e. no X connection at all
     DESKTOP_UNKNOWN, // unknown desktop, simple WM, etc.
     DESKTOP_GNOME,
+    DESKTOP_XFCE,
+    DESKTOP_MATE,
     DESKTOP_KDE,
     DESKTOP_KDE4,
     DESKTOP_TDE

vcl/unx/generic/desktopdetect/desktopdetector.cxx

@@ -43,8 +43,10 @@ static bool is_gnome_desktop( Display* pDisplay )
     // warning: these checks are coincidental, GNOME does not
     // explicitly advertise itself
 
-    if ( NULL != getenv( "GNOME_DESKTOP_SESSION_ID" ) )
+    if ( "gnome" == getenv( "DESKTOP_SESSION" ) || NULL != getenv( "GNOME_DESKTOP_SESSION_ID" ) )
+    {
         ret = true;
+    }
 
     if( ! ret )
     {
@@ -119,6 +121,24 @@ static bool is_gnome_desktop( Display* pDisplay )
     return ret;
 }
 
+static bool is_xfce_desktop( Display* pDisplay )
+{
+    if ( "xfce" == getenv( "DESKTOP_SESSION" ) )
+    {
+        return true;
+    }
+    return false;
+}
+
+static bool is_mate_desktop( Display* pDisplay )
+{
+    if ( "mate" == getenv( "DESKTOP_SESSION" ) )
+    {
+        return true;
+    }
+    return false;
+}
+
 static bool bWasXError = false;
 
 static inline bool WasXError()
@@ -291,6 +311,10 @@ DESKTOP_DETECTOR_PUBLIC DesktopType get_desktop_environment()
             return DESKTOP_KDE4;
         if ( aOver.equalsIgnoreAsciiCase( "gnome" ) )
             return DESKTOP_GNOME;
+        if ( aOver.equalsIgnoreAsciiCase( "xfce" ) )
+            return DESKTOP_XFCE;
+        if ( aOver.equalsIgnoreAsciiCase( "mate" ) )
+            return DESKTOP_MATE;
         if ( aOver.equalsIgnoreAsciiCase( "kde" ) )
             return DESKTOP_KDE;
         if ( aOver.equalsIgnoreAsciiCase( "none" ) )
@@ -351,6 +375,10 @@ DESKTOP_DETECTOR_PUBLIC DesktopType get_desktop_environment()
         ret = DESKTOP_KDE4;
     else if ( is_gnome_desktop( pDisplay ) )
         ret = DESKTOP_GNOME;
+    else if ( is_xfce_desktop( pDisplay ) )
+        ret = DESKTOP_XFCE;
+    else if ( is_mate_desktop( pDisplay ) )
+        ret = DESKTOP_MATE;
     else if ( is_kde_desktop( pDisplay ) )
         ret = DESKTOP_KDE;
     else

vcl/unx/generic/plugadapt/salplug.cxx

@@ -188,7 +188,7 @@ static SalInstance* autodetect_plugin()
     // no server at all: dummy plugin
     if ( desktop == DESKTOP_NONE )
         pList = pHeadlessFallbackList;
-    else if ( desktop == DESKTOP_GNOME )
+    else if ( desktop == DESKTOP_GNOME || desktop == DESKTOP_XFCE || desktop == DESKTOP_MATE )
         pList = pStandardFallbackList;
     else if( desktop == DESKTOP_TDE )
         pList = pTDEFallbackList;
@@ -287,7 +287,7 @@ void SalAbort( const OUString& rErrorText, bool bDumpCore )
         _exit(1);
 }
 
-static const char * desktop_strings[] = { "none", "unknown", "GNOME", "TDE", "KDE", "KDE4" };
+static const char * desktop_strings[] = { "none", "unknown", "GNOME", "XFCE", "MATE", "TDE", "KDE", "KDE4" };
 
 const OUString& SalGetDesktopEnvironment()
 {