[mutter] monitor-manager: Add helper for getting monitor from connector

[Jonas Ådahl <jadahl src gnome org>]

commit 3005a400ca7a85f3931444c1bbba360dc3059984
Author: Jonas Ådahl <jadahl gmail com>
Date:   Wed Jun 21 13:44:06 2017 +0800

    monitor-manager: Add helper for getting monitor from connector
    
    This will be used later.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784199

 src/backends/meta-monitor-manager-private.h |    3 +++
 src/backends/meta-monitor-manager.c         |   18 ++++++++++++++++++
 2 files changed, 21 insertions(+), 0 deletions(-)
---
diff --git a/src/backends/meta-monitor-manager-private.h b/src/backends/meta-monitor-manager-private.h
index 4d079be..563bf92 100644
--- a/src/backends/meta-monitor-manager-private.h
+++ b/src/backends/meta-monitor-manager-private.h
@@ -449,6 +449,9 @@ MetaMonitor *       meta_monitor_manager_get_laptop_panel (MetaMonitorManager *m
 MetaMonitor *       meta_monitor_manager_get_monitor_from_spec (MetaMonitorManager *manager,
                                                                 MetaMonitorSpec    *monitor_spec);
 
+MetaMonitor *       meta_monitor_manager_get_monitor_from_connector (MetaMonitorManager *manager,
+                                                                     const char         *connector);
+
 GList *             meta_monitor_manager_get_monitors      (MetaMonitorManager *manager);
 
 MetaOutput         *meta_monitor_manager_get_outputs       (MetaMonitorManager *manager,
diff --git a/src/backends/meta-monitor-manager.c b/src/backends/meta-monitor-manager.c
index 253b83a..1dd7c20 100644
--- a/src/backends/meta-monitor-manager.c
+++ b/src/backends/meta-monitor-manager.c
@@ -2314,6 +2314,24 @@ meta_monitor_manager_get_laptop_panel (MetaMonitorManager *manager)
 }
 
 MetaMonitor *
+meta_monitor_manager_get_monitor_from_connector (MetaMonitorManager *manager,
+                                                 const char         *connector)
+{
+  GList *l;
+
+  for (l = manager->monitors; l; l = l->next)
+    {
+      MetaMonitor *monitor = l->data;
+
+      if (g_str_equal (meta_monitor_get_connector (monitor),
+                       connector))
+        return monitor;
+    }
+
+  return NULL;
+}
+
+MetaMonitor *
 meta_monitor_manager_get_monitor_from_spec (MetaMonitorManager *manager,
                                             MetaMonitorSpec    *monitor_spec)
 {