[gnome-todo] list-store: Introduce gtd_list_store_get_item_position
- From: Georges Basile Stavracas Neto <gbsneto src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gnome-todo] list-store: Introduce gtd_list_store_get_item_position
- Date: Wed, 12 Sep 2018 11:54:25 +0000 (UTC)
commit dedc18d0185b83b551b92393714309153ed32323
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date: Mon Sep 10 21:46:56 2018 -0300
list-store: Introduce gtd_list_store_get_item_position
A nice API to get the position of an item. It is an O(1)
operation, and will be used in the future.
src/contrib/gtd-list-store.c | 24 ++++++++++++++++++++++++
src/contrib/gtd-list-store.h | 3 +++
2 files changed, 27 insertions(+)
---
diff --git a/src/contrib/gtd-list-store.c b/src/contrib/gtd-list-store.c
index 5a4f631..b195746 100644
--- a/src/contrib/gtd-list-store.c
+++ b/src/contrib/gtd-list-store.c
@@ -534,3 +534,27 @@ gtd_list_store_splice (GtdListStore *store,
gtd_list_store_items_changed (store, position, n_removals, n_additions);
}
+
+/**
+ * gtd_list_store_get_item_position:
+ * @store: a #GtdListStore
+ * @item: the item to retrieve the position
+ *
+ * Retrieves the position of @items inside @store. It is a programming
+ * error to pass an @item that is not contained in @store.
+ *
+ * Returns: the position of @item in @store.
+ */
+guint
+gtd_list_store_get_item_position (GtdListStore *store,
+ gpointer item)
+{
+ GSequenceIter *iter;
+
+ g_return_val_if_fail (GTD_IS_LIST_STORE (store), 0);
+
+ iter = g_hash_table_lookup (store->item_to_iter, item);
+ g_assert (iter != NULL);
+
+ return g_sequence_iter_get_position (iter);
+}
diff --git a/src/contrib/gtd-list-store.h b/src/contrib/gtd-list-store.h
index a97eb0b..84e8882 100644
--- a/src/contrib/gtd-list-store.h
+++ b/src/contrib/gtd-list-store.h
@@ -60,4 +60,7 @@ void gtd_list_store_splice (GtdListStore
gpointer *additions,
guint n_additions);
+guint gtd_list_store_get_item_position (GtdListStore *store,
+ gpointer item);
+
G_END_DECLS
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