display: Keep pointer to the context

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1861>

src/core/display-private.h

@@ -256,7 +256,8 @@ struct _MetaDisplayClass
      (time2) != 0)                                                      \
   )
 
-MetaDisplay * meta_display_new (GError **error);
+MetaDisplay * meta_display_new (MetaContext  *context,
+                                GError      **error);
 
 void meta_display_manage_all_xwindows (MetaDisplay *display);
 void meta_display_unmanage_windows   (MetaDisplay *display,

src/core/display.c

@@ -122,7 +122,12 @@ typedef struct
   guint       ping_timeout_id;
 } MetaPingData;
 
-G_DEFINE_TYPE(MetaDisplay, meta_display, G_TYPE_OBJECT);
+typedef struct _MetaDisplayPrivate
+{
+  MetaContext *context;
+} MetaDisplayPrivate;
+
+G_DEFINE_TYPE_WITH_PRIVATE (MetaDisplay, meta_display, G_TYPE_OBJECT)
 
 /* Signals */
 enum
@@ -789,9 +794,11 @@ meta_display_shutdown_x11 (MetaDisplay *display)
 }
 
 MetaDisplay *
-meta_display_new (GError **error)
+meta_display_new (MetaContext  *context,
+                  GError      **error)
 {
   MetaDisplay *display;
+  MetaDisplayPrivate *priv;
   int i;
   guint32 timestamp;
   Window old_active_xwindow = None;
@@ -802,6 +809,9 @@ meta_display_new (GError **error)
   g_assert (the_display == NULL);
   display = the_display = g_object_new (META_TYPE_DISPLAY, NULL);
 
+  priv = meta_display_get_instance_private (display);
+  priv->context = context;
+
   display->closing = 0;
   display->display_opening = TRUE;
 
@@ -2772,6 +2782,20 @@ meta_display_supports_extended_barriers (MetaDisplay *display)
   return FALSE;
 }
 
+/**
+ * meta_display_get_context:
+ * @display: a #MetaDisplay
+ *
+ * Returns: (transfer none): the #MetaContext
+ */
+MetaContext *
+meta_display_get_context (MetaDisplay *display)
+{
+  MetaDisplayPrivate *priv = meta_display_get_instance_private (display);
+
+  return priv->context;
+}
+
 /**
  * meta_display_get_compositor: (skip)
  * @display: a #MetaDisplay

src/core/meta-context.c

@@ -321,7 +321,7 @@ meta_context_start (MetaContext  *context,
     meta_backend_init_wayland (meta_get_backend ());
 #endif
 
-  priv->display = meta_display_new (error);
+  priv->display = meta_display_new (context, error);
   if (!priv->display)
     return FALSE;
 

src/meta/display.h

@@ -84,6 +84,9 @@ META_EXPORT
 void meta_display_close (MetaDisplay *display,
                          guint32      timestamp);
 
+META_EXPORT
+MetaContext * meta_display_get_context (MetaDisplay *display);
+
 META_EXPORT
 MetaCompositor *meta_display_get_compositor  (MetaDisplay *display);