[pango/listmodel-properties: 1/3] Add listmodel properties to PangoFontFamily

[Matthias Clasen <matthiasc src gnome org>]

commit 21381198f01385a237ea5beee483f73d60aaa7e3
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jun 10 07:17:05 2022 -0400

    Add listmodel properties to PangoFontFamily
    
    Add :item-type and :n-items properties, which
    make the list model implementation more useful.

 pango/fonts.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 56 insertions(+), 1 deletion(-)
---
diff --git a/pango/fonts.c b/pango/fonts.c
index 004089fc..e7bd4780 100644
--- a/pango/fonts.c
+++ b/pango/fonts.c
@@ -2385,13 +2385,68 @@ pango_font_family_default_list_faces (PangoFontFamily   *family,
     *n_faces = 0;
 }
 
+enum {
+  PROP_ITEM_TYPE = 1,
+  PROP_N_ITEMS,
+  N_PROPERTIES
+};
+
+static GParamSpec *font_family_properties[N_PROPERTIES] = { NULL };
+
 static void
-pango_font_family_class_init (PangoFontFamilyClass *class G_GNUC_UNUSED)
+pango_font_family_get_property (GObject    *object,
+                                guint       property_id,
+                                GValue     *value,
+                                GParamSpec *pspec)
 {
+  switch (property_id)
+    {
+    case PROP_ITEM_TYPE:
+      g_value_set_gtype (value, PANGO_TYPE_FONT);
+      break;
+
+    case PROP_N_ITEMS:
+      g_value_set_uint (value, pango_font_family_get_n_items (G_LIST_MODEL (object)));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+    }
+}
+
+static void
+pango_font_family_class_init (PangoFontFamilyClass *class)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (class);
+
+  gobject_class->get_property = pango_font_family_get_property;
+
   class->is_monospace = pango_font_family_default_is_monospace;
   class->is_variable = pango_font_family_default_is_variable;
   class->get_face = pango_font_family_real_get_face;
   class->list_faces = pango_font_family_default_list_faces;
+
+  /**
+   * PangoFontFamily:item-type:
+   *
+   * The type of items contained in this list.
+   */
+  font_family_properties[PROP_ITEM_TYPE] =
+    g_param_spec_gtype ("item-type", "", "", G_TYPE_OBJECT,
+                        G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  /**
+   * PangoFontFamily:n-items:
+   *
+   * The number of items contained in this list.
+   */
+  font_family_properties[PROP_N_ITEMS] =
+    g_param_spec_uint ("n-items", "", "", 0, G_MAXUINT, 0,
+                       G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  g_object_class_install_properties (gobject_class,
+                                     N_PROPERTIES,
+                                     font_family_properties);
 }
 
 static void