[gtk: 1/2] x11: set a default value for program_class

[Matthias Clasen <matthiasc src gnome org>]

commit eff53c023a26d605cce7c87da361f6184260eca2
Author: Vincent Bernat <vincent bernat ch>
Date:   Fri Jul 30 23:21:19 2021 +0200

    x11: set a default value for program_class
    
    This was also the behaviour with GTK 3. We use the capitalized program
    name.
    
    Fixes #4138
    
    Signed-off-by: Vincent Bernat <vincent bernat ch>

 gdk/x11/gdkdisplay-x11.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gdk/x11/gdkdisplay-x11.c b/gdk/x11/gdkdisplay-x11.c
index 33a3648f4e..30d040a132 100644
--- a/gdk/x11/gdkdisplay-x11.c
+++ b/gdk/x11/gdkdisplay-x11.c
@@ -204,6 +204,9 @@ static void
 gdk_x11_display_init (GdkX11Display *self)
 {
   self->monitors = g_list_store_new (GDK_TYPE_MONITOR);
+  self->program_class = g_strdup (g_get_prgname ());
+  if (self->program_class && self->program_class[0])
+    self->program_class[0] = g_ascii_toupper (self->program_class[0]);
 }
 
 static void