From ad154e740dba89dfdae30f80beab056601b69472 Mon Sep 17 00:00:00 2001
From: Rui Matos <tiagomatos@gmail.com>
Date: Thu, 2 Apr 2015 19:30:34 +0200
Subject: display-adapter: Allow setting an external default adapter instance

This will allow gnome-shell, when running as a native wayland
compositor, to set its own display adapter implementation since the X
one doesn't work for that case.

https://bugzilla.gnome.org/show_bug.cgi?id=747273
---
 libcaribou/display-adapter.vala | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libcaribou/display-adapter.vala b/libcaribou/display-adapter.vala
index 007d90e..6ffbdd5 100644
--- a/libcaribou/display-adapter.vala
+++ b/libcaribou/display-adapter.vala
@@ -110,6 +110,13 @@ namespace Caribou {
                                                    KeyButtonCallback? func);
 
         static DisplayAdapter instance;
+        public static bool set_default (DisplayAdapter adapter) {
+            if (instance != null)
+                return false;
+
+            instance = adapter;
+            return true;
+        }
         public static DisplayAdapter get_default () {
             if (instance == null) {
                 var display = Gdk.DisplayManager.get ().get_default_display ();
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