[libgnome-volume-control/feature/gobject-cleanups: 5/8] mixer-control: Improve GObject properties gunk a bit

[Niels De Graef <nielsdg src gnome org>]

commit 418f277ae5895083ae1d25dec6dc39cee74ff994
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Sun May 29 13:45:12 2022 +0200

    mixer-control: Improve GObject properties gunk a bit
    
    Keep track of the `GParamSpec`s of the properties. This allows us to use
    `g_object_notify_by_pspec()`, which is a bit more performant than
    `g_object_notify()`(as it doesn't need to take a global lock to lookup
    the property name). It also prevents accidental typos in the property
    name at compile time.
    
    Also always add `G_PARAM_STATIC_STRINGS`, to prevent some unnecessary
    string duplications of property name, blurb and description.

 gvc-mixer-control.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)
---
diff --git a/gvc-mixer-control.c b/gvc-mixer-control.c
index d84da35..ab7aba8 100644
--- a/gvc-mixer-control.c
+++ b/gvc-mixer-control.c
@@ -54,8 +54,10 @@
 
 enum {
         PROP_0,
-        PROP_NAME
+        PROP_NAME,
+        N_PROPS
 };
+static GParamSpec *obj_props[N_PROPS] = { NULL, };
 
 struct GvcMixerControlPrivate
 {
@@ -3628,7 +3630,7 @@ gvc_mixer_control_set_property (GObject       *object,
         case PROP_NAME:
                 g_free (self->priv->name);
                 self->priv->name = g_value_dup_string (value);
-                g_object_notify (G_OBJECT (self), "name");
+                g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_NAME]);
                 break;
         default:
                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -3684,13 +3686,12 @@ gvc_mixer_control_class_init (GvcMixerControlClass *klass)
         object_class->set_property = gvc_mixer_control_set_property;
         object_class->get_property = gvc_mixer_control_get_property;
 
-        g_object_class_install_property (object_class,
-                                         PROP_NAME,
-                                         g_param_spec_string ("name",
-                                                              "Name",
-                                                              "Name to display for this mixer control",
-                                                              NULL,
-                                                              G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
+        obj_props[PROP_NAME] = g_param_spec_string ("name",
+                                                    "Name",
+                                                    "Name to display for this mixer control",
+                                                    NULL,
+                                                    
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY|G_PARAM_STATIC_STRINGS);
+        g_object_class_install_properties (object_class, N_PROPS, obj_props);
 
         signals [STATE_CHANGED] =
                 g_signal_new ("state-changed",