[mutter/gnome-3-24] monitor: Don't get the monitor manager from the backend

[Jonas Ådahl <jadahl src gnome org>]

commit dfdc15c72ca84ee129515d228bafef7dab6a656a
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu May 11 17:24:53 2017 +0800

    monitor: Don't get the monitor manager from the backend
    
    We will both create and destroy monitors during initialization (when
    using the X11 backend), so don't try to access the monitor manager from
    the backend, but store a pointer to it instead.
    
    It's stored in MetaMonitor even though only MetaMonitorTiled uses it,
    mostly because it makes more sense to store such a pointer there.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781723

 src/backends/meta-monitor-manager.c |    2 +-
 src/backends/meta-monitor.c         |   20 +++++++++++++-------
 src/backends/meta-monitor.h         |    3 ++-
 3 files changed, 16 insertions(+), 9 deletions(-)
---
diff --git a/src/backends/meta-monitor-manager.c b/src/backends/meta-monitor-manager.c
index dc1d960..0d1bb05 100644
--- a/src/backends/meta-monitor-manager.c
+++ b/src/backends/meta-monitor-manager.c
@@ -1667,7 +1667,7 @@ rebuild_monitors (MetaMonitorManager *manager)
         {
           MetaMonitorNormal *monitor_normal;
 
-          monitor_normal = meta_monitor_normal_new (output);
+          monitor_normal = meta_monitor_normal_new (manager, output);
           manager->monitors = g_list_append (manager->monitors,
                                              monitor_normal);
         }
diff --git a/src/backends/meta-monitor.c b/src/backends/meta-monitor.c
index 7d67989..30c2197 100644
--- a/src/backends/meta-monitor.c
+++ b/src/backends/meta-monitor.c
@@ -34,6 +34,8 @@ typedef struct _MetaMonitorMode
 
 typedef struct _MetaMonitorPrivate
 {
+  MetaMonitorManager *monitor_manager;
+
   GList *outputs;
   GList *modes;
 
@@ -348,7 +350,8 @@ meta_monitor_normal_generate_modes (MetaMonitorNormal *monitor_normal)
 }
 
 MetaMonitorNormal *
-meta_monitor_normal_new (MetaOutput *output)
+meta_monitor_normal_new (MetaMonitorManager *monitor_manager,
+                         MetaOutput         *output)
 {
   MetaMonitorNormal *monitor_normal;
   MetaMonitor *monitor;
@@ -358,6 +361,8 @@ meta_monitor_normal_new (MetaOutput *output)
   monitor = META_MONITOR (monitor_normal);
   monitor_priv = meta_monitor_get_instance_private (monitor);
 
+  monitor_priv->monitor_manager = monitor_manager;
+
   monitor_priv->outputs = g_list_append (NULL, output);
   monitor_priv->winsys_id = output->winsys_id;
   meta_monitor_generate_spec (monitor);
@@ -924,6 +929,8 @@ meta_monitor_tiled_new (MetaMonitorManager *monitor_manager,
   monitor = META_MONITOR (monitor_tiled);
   monitor_priv = meta_monitor_get_instance_private (monitor);
 
+  monitor_priv->monitor_manager = monitor_manager;
+
   monitor_tiled->tile_group_id = output->tile_info.group_id;
   monitor_priv->winsys_id = output->winsys_id;
 
@@ -992,13 +999,12 @@ meta_monitor_tiled_get_suggested_position (MetaMonitor *monitor,
 static void
 meta_monitor_tiled_finalize (GObject *object)
 {
-  MetaMonitorTiled *monitor_tiled = META_MONITOR_TILED (object);
-  MetaBackend *backend = meta_get_backend ();
-  MetaMonitorManager *monitor_manager =
-    meta_backend_get_monitor_manager (backend);
+  MetaMonitor *monitor = META_MONITOR (object);
+  MetaMonitorPrivate *monitor_priv =
+    meta_monitor_get_instance_private (monitor);
 
-  meta_monitor_manager_tiled_monitor_removed (monitor_manager,
-                                              META_MONITOR (monitor_tiled));
+  meta_monitor_manager_tiled_monitor_removed (monitor_priv->monitor_manager,
+                                              monitor);
 }
 
 static void
diff --git a/src/backends/meta-monitor.h b/src/backends/meta-monitor.h
index ec2b4cd..aa03889 100644
--- a/src/backends/meta-monitor.h
+++ b/src/backends/meta-monitor.h
@@ -86,7 +86,8 @@ G_DECLARE_FINAL_TYPE (MetaMonitorTiled, meta_monitor_tiled,
 MetaMonitorTiled * meta_monitor_tiled_new (MetaMonitorManager *monitor_manager,
                                            MetaOutput         *main_output);
 
-MetaMonitorNormal * meta_monitor_normal_new (MetaOutput *output);
+MetaMonitorNormal * meta_monitor_normal_new (MetaMonitorManager *monitor_manager,
+                                             MetaOutput         *output);
 
 MetaMonitorSpec * meta_monitor_get_spec (MetaMonitor *monitor);