[totem] preferences: Pass TotemObject during construction

[Bastien Nocera <hadess src gnome org>]

commit 2892f46c2801b68ff1410f5c881c46698b9dc968
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri May 7 20:04:33 2021 -0300

    preferences: Pass TotemObject during construction
    
    Make use of GObject's property system to pass the main TotemObject
    to TotemPreferencesDialog as a construct-only argument.

 src/totem-preferences.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)
---
diff --git a/src/totem-preferences.c b/src/totem-preferences.c
index e58c093a1..960630930 100644
--- a/src/totem-preferences.c
+++ b/src/totem-preferences.c
@@ -218,11 +218,68 @@ plugin_button_clicked_cb (GtkButton *button,
        gtk_window_present (GTK_WINDOW (totem->plugins));
 }
 
+enum {
+       PROP_0,
+       PROP_TOTEM,
+       N_PROPS
+};
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+totem_preferences_dialog_get_property (GObject *object,
+                                       guint prop_id,
+                                       GValue *value,
+                                       GParamSpec *pspec)
+{
+       TotemPreferencesDialog *self = TOTEM_PREFERENCES_DIALOG (object);
+
+       switch (prop_id)
+         {
+         case PROP_TOTEM:
+                 g_value_set_object (value, self->totem);
+                 break;
+         default:
+                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+         }
+}
+
+static void
+totem_preferences_dialog_set_property (GObject *object,
+                                       guint prop_id,
+                                       const GValue *value,
+                                       GParamSpec *pspec)
+{
+       TotemPreferencesDialog *self = TOTEM_PREFERENCES_DIALOG (object);
+
+       switch (prop_id)
+         {
+         case PROP_TOTEM:
+                 g_assert (self->totem == NULL);
+                 self->totem = g_value_get_object (value);
+                 break;
+         default:
+                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+         }
+}
+
 static void
 totem_preferences_dialog_class_init (TotemPreferencesDialogClass *klass)
 {
+       GObjectClass *object_class = G_OBJECT_CLASS (klass);
        GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
+       object_class->get_property = totem_preferences_dialog_get_property;
+       object_class->set_property = totem_preferences_dialog_set_property;
+
+       properties[PROP_TOTEM] = g_param_spec_object ("totem", "Totem object", "Totem object",
+                                                     TOTEM_TYPE_OBJECT,
+                                                     G_PARAM_READWRITE |
+                                                     G_PARAM_CONSTRUCT_ONLY |
+                                                     G_PARAM_STATIC_STRINGS);
+
+       g_object_class_install_properties (object_class, N_PROPS, properties);
+
        gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/totem/ui/preferences.ui");
 
        gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, font_sel_button);
@@ -263,10 +320,10 @@ totem_setup_preferences (Totem *totem)
        g_return_if_fail (totem->settings != NULL);
 
        totem->prefs = g_object_new (TOTEM_TYPE_PREFERENCES_DIALOG,
+                                    "totem", totem,
                                     "use-header-bar", 1,
                                     NULL);
        prefs = TOTEM_PREFERENCES_DIALOG (totem->prefs);
-       prefs->totem = totem;
 
        gtk_window_set_transient_for (GTK_WINDOW (totem->prefs), GTK_WINDOW(totem->win));