1 files changed, 164 insertions, 0 deletions
diff --git a/gio/glistmodel.c b/gio/glistmodel.c
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+/*
+ * Copyright © 2014 Lars Uebernickel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors: Lars Uebernickel <lars@uebernic.de>
+ */
+
+#include "config.h"
+
+#include "glistmodel.h"
+
+G_DEFINE_INTERFACE (GListModel, g_list_model, G_TYPE_OBJECT);
+
+/**
+ * SECTION:glistmodel
+ * @title: GListModel
+ * @short_description: An interface describing a dynamic list of objects
+ * @include: gio/gio.h
+ *
+ * #GListModel is a dynamic list of #GObjects.
+ */
+
+/**
+ * GListModel:
+ * @get_item_type: the virtual function pointer for g_list_model_get_item_type()
+ * @get_n_items: the virtual function pointer for g_list_model_get_n_items()
+ * @get_item: the virtual function pointer for g_list_model_get_item()
+ *
+ * The virtual function table for #GListModel.
+ *
+ * Since: 2.42
+ */
+
+static guint g_list_model_changed_signal;
+
+static void
+g_list_model_default_init (GListModelInterface *iface)
+{
+  /**
+   * GListModel::items-changed
+   * @list: the #GListModel that changed
+   * @position: the position at which @list changed
+   * @removed: the number of items removed
+   * @added: the number of items added
+   *
+   * This signal is emitted whenever items were added or removed to
+   * @list. At @position, @removed items were removed and @added items
+   * were added in their place.
+   *
+   * Since: 2.42
+   */
+  g_list_model_changed_signal = g_signal_new ("items-changed",
+                                              G_TYPE_LIST_MODEL,
+                                              G_SIGNAL_RUN_LAST,
+                                              0,
+                                              NULL, NULL,
+                                              g_cclosure_marshal_generic,
+                                              G_TYPE_NONE,
+                                              3, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT);
+}
+
+/**
+ * g_list_model_get_item_type:
+ * @list: a @GListModel
+ *
+ * Gets the type of the items in @list. All items returned from
+ * g_list_model_get_type() are of that type.
+ *
+ * Returns: the #GType of the items contained in @list.
+ *
+ * Since: 2.42
+ */
+GType
+g_list_model_get_item_type (GListModel *list)
+{
+  g_return_val_if_fail (G_IS_LIST_MODEL (list), G_TYPE_NONE);
+
+  return G_LIST_MODEL_GET_IFACE (list)->get_item_type (list);
+}
+
+/**
+ * g_list_model_get_n_items:
+ * @list: a @GListModel
+ *
+ * Gets the number of items in @list.
+ *
+ * Returns: the number of items in @list.
+ *
+ * Since: 2.42
+ */
+guint
+g_list_model_get_n_items (GListModel *list)
+{
+  g_return_if_fail (G_IS_LIST_MODEL (list));
+
+  return G_LIST_MODEL_GET_IFACE (list)->get_n_items (list);
+}
+
+/**
+ * g_list_model_get_item:
+ * @list: a @GListModel
+ * @position: the position of the item to fetch
+ *
+ * Get the item at @position. If @position is greater than the number of
+ * items in @list, %NULL is returned.
+ *
+ * %NULL is never returned for an index that is smaller than the length
+ * of the list.
+ *
+ * Returns: (transfer full) (allow-none) (type GObject): the item at
+ * @position.
+ *
+ * Since: 2.42
+ */
+gpointer
+g_list_model_get_item (GListModel *list,
+                       guint       position)
+{
+  g_return_val_if_fail (G_IS_LIST_MODEL (list), NULL);
+
+  return G_LIST_MODEL_GET_IFACE (list)->get_item (list, position);
+}
+
+/**
+ * g_list_model_items_changed:
+ * @list: a @GListModel
+ * @position: the position at which @list changed
+ * @removed: the number of items removed
+ * @added: the number of items added
+ *
+ * Emits the #GListModel::items-changed signal on @list.
+ *
+ * This function should only be called by classes implementing
+ * #GListModel. It has to be called after the internal representation
+ * of @list has been updated, because handlers connected to this signal
+ * might query the new state of the list.
+ *
+ * Implementations may not emit this signal in response to a call to the
+ * #GListModel API.
+ *
+ * Since: 2.42
+ */
+void
+g_list_model_items_changed (GListModel *list,
+                            guint       position,
+                            guint       removed,
+                            guint       added)
+{
+  g_return_if_fail (G_IS_LIST_MODEL (list));
+
+  g_signal_emit (list, g_list_model_changed_signal, 0, position, removed, added);
+}