[sysprof] sysprof: close window on last ctrl+w if empty

[Christian Hergert <chergert src gnome org>]

commit ad1cfebedd0fb04aeaa7fdba7a3654b8f5db8196
Author: Christian Hergert <chergert redhat com>
Date:   Thu May 16 12:06:23 2019 -0700

    sysprof: close window on last ctrl+w if empty

 src/sysprof/sysprof-window.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/src/sysprof/sysprof-window.c b/src/sysprof/sysprof-window.c
index 2cd261d..d47eff9 100644
--- a/src/sysprof/sysprof-window.c
+++ b/src/sysprof/sysprof-window.c
@@ -83,9 +83,24 @@ close_tab_cb (GSimpleAction *action,
               gpointer       user_data)
 {
   SysprofWindow *self = user_data;
+  GtkNotebook *notebook;
 
   g_return_if_fail (SYSPROF_IS_WINDOW (self));
 
+  notebook = GTK_NOTEBOOK (self->notebook);
+
+  if (gtk_notebook_get_n_pages (notebook) == 1)
+    {
+      GtkWidget *child = gtk_notebook_get_nth_page (notebook, 0);
+
+      if (SYSPROF_IS_DISPLAY (child) &&
+          sysprof_display_is_empty (SYSPROF_DISPLAY (child)))
+        {
+          gtk_widget_destroy (GTK_WIDGET (self));
+          return;
+        }
+    }
+
   sysprof_notebook_close_current (self->notebook);
 }