[mutter] DisplayConfig: Add display-name monitor property

[Jonas Ådahl <jadahl src gnome org>]

commit 04d7fcf60dadcccdc03f895e73f9f6410cc044d6
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu Apr 6 13:13:20 2017 +0800

    DisplayConfig: Add display-name monitor property
    
    This is the same property as the one associated with an output in
    GetResources.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=777732

 src/backends/meta-monitor-manager.c    |    8 ++++++++
 src/org.gnome.Mutter.DisplayConfig.xml |    1 +
 2 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/src/backends/meta-monitor-manager.c b/src/backends/meta-monitor-manager.c
index faaa3ee..3404be8 100644
--- a/src/backends/meta-monitor-manager.c
+++ b/src/backends/meta-monitor-manager.c
@@ -1419,6 +1419,8 @@ meta_monitor_manager_handle_get_current_state (MetaDBusDisplayConfig *skeleton,
       GVariantBuilder monitor_properties_builder;
       GList *k;
       gboolean is_builtin;
+      MetaOutput *main_output;
+      char *display_name;
 
       current_mode = meta_monitor_get_current_mode (monitor);
       preferred_mode = meta_monitor_get_preferred_mode (monitor);
@@ -1465,6 +1467,12 @@ meta_monitor_manager_handle_get_current_state (MetaDBusDisplayConfig *skeleton,
                              "is-builtin",
                              g_variant_new_boolean (is_builtin));
 
+      main_output = meta_monitor_get_main_output (monitor);
+      display_name = make_display_name (manager, main_output);
+      g_variant_builder_add (&monitor_properties_builder, "{sv}",
+                             "display-name",
+                             g_variant_new_take_string (display_name));
+
       g_variant_builder_add (&monitors_builder, MONITOR_FORMAT,
                              monitor_spec->connector,
                              monitor_spec->vendor,
diff --git a/src/org.gnome.Mutter.DisplayConfig.xml b/src/org.gnome.Mutter.DisplayConfig.xml
index d788577..5b54438 100644
--- a/src/org.gnome.Mutter.DisplayConfig.xml
+++ b/src/org.gnome.Mutter.DisplayConfig.xml
@@ -334,6 +334,7 @@
            - "is-builtin" (b): whether the monitor is built in, e.g. a
                                laptop panel (absence of this means it is
                                not built in)
+           - "display-name" (s): a human readable display name of the monitor
 
         Possible mode flags:
          1 : preferred mode