[gnome-keyring] gcr: Add GcrSingleCollection internal class

[Stefan Walter <stefw src gnome org>]

commit 6cf14cf7397de26f80257dc49c741ec17f446a51
Author: Stef Walter <stefw collabora co uk>
Date:   Tue Sep 27 15:44:11 2011 +0200

    gcr: Add GcrSingleCollection internal class

 gcr/Makefile.am             |    1 +
 gcr/gcr-single-collection.c |  157 +++++++++++++++++++++++++++++++++++++++++++
 gcr/gcr-single-collection.h |   55 +++++++++++++++
 3 files changed, 213 insertions(+), 0 deletions(-)
---
diff --git a/gcr/Makefile.am b/gcr/Makefile.am
index 3b60978..cdef989 100644
--- a/gcr/Makefile.am
+++ b/gcr/Makefile.am
@@ -117,6 +117,7 @@ libgcr_base_ GCR_MAJOR@_la_SOURCES = \
 	gcr-record.c gcr-record.h \
 	gcr-simple-certificate.c gcr-simple-certificate.h \
 	gcr-simple-collection.c gcr-simple-collection.h \
+	gcr-single-collection.c gcr-single-collection.h \
 	gcr-trust.c gcr-trust.h \
 	gcr-types.h \
 	gcr-union-collection.c gcr-union-collection.h \
diff --git a/gcr/gcr-single-collection.c b/gcr/gcr-single-collection.c
new file mode 100644
index 0000000..942d47d
--- /dev/null
+++ b/gcr/gcr-single-collection.c
@@ -0,0 +1,157 @@
+/*
+ * gnome-keyring
+ *
+ * Copyright (C) 2010 Stefan Walter
+ *
+ * This program 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 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This program 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 program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include "gcr-collection.h"
+#include "gcr-single-collection.h"
+
+#include <string.h>
+
+/**
+ * GcrSingleCollection:
+ *
+ * A single implementation of #GcrCollection.
+ */
+
+struct _GcrSingleCollection {
+	GObject parent;
+	GObject *object;
+};
+
+/**
+ * GcrSingleCollectionClass:
+ * @parent_class: The parent class
+ *
+ * The class for #GcrSingleCollection.
+ */
+
+struct _GcrSingleCollectionClass {
+	GObjectClass parent_class;
+};
+
+static void _gcr_single_collection_iface (GcrCollectionIface *iface);
+G_DEFINE_TYPE_WITH_CODE (GcrSingleCollection, _gcr_single_collection, G_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (GCR_TYPE_COLLECTION, _gcr_single_collection_iface));
+
+/* -----------------------------------------------------------------------------
+ * OBJECT
+ */
+
+static void
+_gcr_single_collection_init (GcrSingleCollection *self)
+{
+
+}
+
+static void
+_gcr_single_collection_dispose (GObject *obj)
+{
+	GcrSingleCollection *self = GCR_SINGLE_COLLECTION (obj);
+
+	_gcr_single_collection_set_object (self, NULL);
+
+	G_OBJECT_CLASS (_gcr_single_collection_parent_class)->dispose (obj);
+}
+
+static void
+_gcr_single_collection_class_init (GcrSingleCollectionClass *klass)
+{
+	GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+	gobject_class->dispose = _gcr_single_collection_dispose;
+}
+
+static guint
+_gcr_single_collection_real_get_length (GcrCollection *coll)
+{
+	GcrSingleCollection *self = GCR_SINGLE_COLLECTION (coll);
+	return self->object == NULL ? 0 : 1;
+}
+
+static GList*
+_gcr_single_collection_real_get_objects (GcrCollection *coll)
+{
+	GcrSingleCollection *self = GCR_SINGLE_COLLECTION (coll);
+	return self->object == NULL ? NULL : g_list_append (NULL, self->object);
+}
+
+static gboolean
+_gcr_single_collection_real_contains (GcrCollection *collection,
+                                      GObject *object)
+{
+	GcrSingleCollection *self = GCR_SINGLE_COLLECTION (collection);
+	return self->object == object;
+}
+
+static void
+_gcr_single_collection_iface (GcrCollectionIface *iface)
+{
+	iface->get_length = _gcr_single_collection_real_get_length;
+	iface->get_objects = _gcr_single_collection_real_get_objects;
+	iface->contains = _gcr_single_collection_real_contains;
+}
+
+/* -----------------------------------------------------------------------------
+ * PUBLIC
+ */
+
+GcrCollection *
+_gcr_single_collection_new (GObject *object)
+{
+	GcrSingleCollection *self;
+
+	self = g_object_new (GCR_TYPE_SINGLE_COLLECTION, NULL);
+	_gcr_single_collection_set_object (self, object);
+
+	return GCR_COLLECTION (self);
+}
+
+GObject *
+_gcr_single_collection_get_object (GcrSingleCollection *self)
+{
+	g_return_val_if_fail (GCR_IS_SINGLE_COLLECTION (self), NULL);
+	return self->object;
+}
+
+void
+_gcr_single_collection_set_object (GcrSingleCollection *self,
+                                   GObject *object)
+{
+	GObject *obj;
+
+	g_return_if_fail (GCR_IS_SINGLE_COLLECTION (self));
+	g_return_if_fail (object == NULL || G_IS_OBJECT (object));
+
+	if (object == self->object)
+		return;
+
+	if (self->object) {
+		obj = self->object;
+		self->object = NULL;
+		gcr_collection_emit_removed (GCR_COLLECTION (self), obj);
+		g_object_unref (obj);
+	}
+
+	if (object) {
+		self->object = g_object_ref (object);
+		gcr_collection_emit_added (GCR_COLLECTION (self), self->object);
+	}
+}
diff --git a/gcr/gcr-single-collection.h b/gcr/gcr-single-collection.h
new file mode 100644
index 0000000..9bd598f
--- /dev/null
+++ b/gcr/gcr-single-collection.h
@@ -0,0 +1,55 @@
+/*
+ * gnome-keyring
+ *
+ * Copyright (C) 2011 Collabora Ltd.
+ *
+ * This program 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 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This program 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 program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Stef Walter <stefw collabora co uk>
+ */
+
+#ifndef __GCR_SINGLE_COLLECTION_H__
+#define __GCR_SINGLE_COLLECTION_H__
+
+#include "gcr-base.h"
+#include "gcr-collection.h"
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define GCR_TYPE_SINGLE_COLLECTION               (_gcr_single_collection_get_type ())
+#define GCR_SINGLE_COLLECTION(obj)               (G_TYPE_CHECK_INSTANCE_CAST ((obj), GCR_TYPE_COLLECTION, GcrSingleCollection))
+#define GCR_SINGLE_COLLECTION_CLASS(klass)       (G_TYPE_CHECK_CLASS_CAST ((klass), GCR_TYPE_COLLECTION, GcrSingleCollectionClass))
+#define GCR_IS_SINGLE_COLLECTION(obj)            (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GCR_TYPE_COLLECTION))
+#define GCR_IS_SINGLE_COLLECTION_CLASS(klass)    (G_TYPE_CHECK_CLASS_TYPE ((klass), GCR_TYPE_COLLECTION))
+#define GCR_SINGLE_COLLECTION_GET_CLASS(obj)     (G_TYPE_INSTANCE_GET_CLASS ((obj), GCR_TYPE_COLLECTION, GcrSingleCollectionClass))
+
+typedef struct _GcrSingleCollection GcrSingleCollection;
+typedef struct _GcrSingleCollectionClass GcrSingleCollectionClass;
+
+GType               _gcr_single_collection_get_type                (void);
+
+GcrCollection *     _gcr_single_collection_new                     (GObject *object);
+
+GObject *           _gcr_single_collection_get_object              (GcrSingleCollection *self);
+
+void                _gcr_single_collection_set_object              (GcrSingleCollection *self,
+                                                                   GObject *object);
+
+G_END_DECLS
+
+#endif /* __GCR_SINGLE_COLLECTION_H__ */