[evolution-data-server/openismus-work] Adding ESourceRevisionGuards

[Tristan Van Berkom <tvb src gnome org>]

commit aa2690855bd61cd9e04e2c474f57e8ab8ee54116
Author: Tristan Van Berkom <tristanvb openismus com>
Date:   Thu Jan 24 16:07:27 2013 +0900

    Adding ESourceRevisionGuards
    
    The ESourceRevisionGuards extension configures whether an ESource backend
    should check revisions on object modifications and produce an
    E_CLIENT_ERROR_OUT_OF_SYNC error upon revision conflicts.

 libedataserver/Makefile.am                |    2 +
 libedataserver/e-source-revision-guards.c |  210 +++++++++++++++++++++++++++++
 libedataserver/e-source-revision-guards.h |   94 +++++++++++++
 libedataserver/libedataserver.h           |    1 +
 4 files changed, 307 insertions(+), 0 deletions(-)
---
diff --git a/libedataserver/Makefile.am b/libedataserver/Makefile.am
index 20d8c8e..58fe8b4 100644
--- a/libedataserver/Makefile.am
+++ b/libedataserver/Makefile.am
@@ -84,6 +84,7 @@ libedataserver_1_2_la_SOURCES =		\
 	e-source-refresh.c		\
 	e-source-registry.c		\
 	e-source-resource.c		\
+	e-source-revision-guards.c	\
 	e-source-security.c		\
 	e-source-selectable.c		\
 	e-source-smime.c		\
@@ -162,6 +163,7 @@ libedataserverinclude_HEADERS =		\
 	e-source-refresh.h		\
 	e-source-registry.h		\
 	e-source-resource.h		\
+	e-source-revision-guards.h	\
 	e-source-security.h		\
 	e-source-selectable.h		\
 	e-source-smime.h		\
diff --git a/libedataserver/e-source-revision-guards.c b/libedataserver/e-source-revision-guards.c
new file mode 100644
index 0000000..9e3d793
--- /dev/null
+++ b/libedataserver/e-source-revision-guards.c
@@ -0,0 +1,210 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+/* e-source-revision-guards.c - Revision Guard Configuration.
+ *
+ * Copyright (C) 2013 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * 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
+ * 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., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Authors: Tristan Van Berkom <tristanvb openismus com>
+ */
+
+/**
+ * SECTION: e-source-revision-guards
+ * @include: libedataserver/libedataserver.h
+ * @short_description: #ESource extension to configure revision guards
+ *
+ * The #ESourceRevisionGuards extension configures whether revisions
+ * should be checked on modified objects. If a modified object has
+ * a conflicting revision with an existing object, then an
+ * %E_CLIENT_ERROR_OUT_OF_SYNC error should be produced for that object
+ * and the modification should be discarded.
+ *
+ * Access the extension as follows:
+ *
+ * |[
+ *   #include <libedataserver/libedataserver.h>
+ *
+ *   ESourceRevisionGuards *extension;
+ *
+ *   extension = e_source_get_extension (source, E_SOURCE_EXTENSION_REVISION_GUARDS);
+ * ]|
+ **/
+
+#include <libedataserver/e-data-server-util.h>
+
+#include "e-source-revision-guards.h"
+
+#define E_SOURCE_ABC_GET_PRIVATE(obj)			\
+	(G_TYPE_INSTANCE_GET_PRIVATE			\
+	 ((obj), E_TYPE_SOURCE_REVISION_GUARDS,	\
+	  ESourceRevisionGuardsPrivate))
+
+struct _ESourceRevisionGuardsPrivate {
+	GMutex property_lock;
+	gboolean enabled;
+};
+
+enum {
+	PROP_0,
+	PROP_ENABLED
+};
+
+G_DEFINE_TYPE (
+	ESourceRevisionGuards,
+	e_source_revision_guards,
+	E_TYPE_SOURCE_EXTENSION)
+
+static void
+source_revision_guards_finalize (GObject *object)
+{
+	ESourceRevisionGuardsPrivate *priv;
+
+	priv = E_SOURCE_ABC_GET_PRIVATE (object);
+
+	g_mutex_clear (&priv->property_lock);
+
+	G_OBJECT_CLASS (e_source_revision_guards_parent_class)->finalize (object);
+}
+
+static void
+source_revision_guards_set_property (GObject *object,
+				     guint property_id,
+				     const GValue *value,
+				     GParamSpec *pspec)
+{
+	ESourceRevisionGuards *extension = E_SOURCE_REVISION_GUARDS (object);
+
+	switch (property_id) {
+	case PROP_ENABLED:
+		e_source_revision_guards_set_enabled (extension, g_value_get_boolean (value));
+		return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+source_revision_guards_get_property (GObject *object,
+				     guint property_id,
+				     GValue *value,
+				     GParamSpec *pspec)
+{
+	ESourceRevisionGuards *extension = E_SOURCE_REVISION_GUARDS (object);
+
+	switch (property_id) {
+	case PROP_ENABLED:
+		g_value_set_boolean (value, e_source_revision_guards_get_enabled (extension));
+		return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+e_source_revision_guards_class_init (ESourceRevisionGuardsClass *class)
+{
+	GObjectClass          *object_class;
+	ESourceExtensionClass *extension_class;
+
+	extension_class       = E_SOURCE_EXTENSION_CLASS (class);
+	extension_class->name = E_SOURCE_EXTENSION_REVISION_GUARDS;
+
+	object_class               = G_OBJECT_CLASS (class);
+	object_class->finalize     = source_revision_guards_finalize;
+	object_class->get_property = source_revision_guards_get_property;
+	object_class->set_property = source_revision_guards_set_property;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_ENABLED,
+		g_param_spec_boolean (
+			"enabled",
+			"Enabled",
+			"Whether to enable or disable the revision guards",
+			FALSE,
+			G_PARAM_READWRITE |
+			G_PARAM_CONSTRUCT |
+			E_SOURCE_PARAM_SETTING));
+
+	g_type_class_add_private (class, sizeof (ESourceRevisionGuardsPrivate));
+}
+
+static void
+e_source_revision_guards_init (ESourceRevisionGuards *extension)
+{
+	extension->priv = E_SOURCE_ABC_GET_PRIVATE (extension);
+	extension->priv->enabled = FALSE;
+
+	g_mutex_init (&extension->priv->property_lock);
+}
+
+/**
+ * e_source_revision_guards_set_enabled:
+ * @extension: An #ESourceRevisionGuards
+ * @enabled: Whether to enable or disable the revision guards.
+ *
+ * Enables or disables the revision guards for a given #ESource.
+ *
+ * Revision guards are disabled by default.
+ *
+ * Since: 3.8
+ */
+void
+e_source_revision_guards_set_enabled (ESourceRevisionGuards  *extension,
+				      gboolean                enabled)
+{
+	g_return_if_fail (E_IS_SOURCE_REVISION_GUARDS (extension));
+
+	enabled = !!enabled;
+
+	g_mutex_lock (&extension->priv->property_lock);
+
+	if (extension->priv->enabled == enabled) {
+		g_mutex_unlock (&extension->priv->property_lock);
+		return;
+	}
+
+	extension->priv->enabled = enabled;
+
+	g_mutex_unlock (&extension->priv->property_lock);
+
+	g_object_notify (G_OBJECT (extension), "enabled");
+}
+
+
+/**
+ * e_source_revision_guards_get_enabled:
+ * @extension: An #ESourceRevisionGuards
+ *
+ * Checks whether revision guards for the given #ESource are enabled.
+ *
+ * Returns: %TRUE if the revision guards are enabled.
+ *
+ * Since: 3.8
+ */
+gboolean
+e_source_revision_guards_get_enabled (ESourceRevisionGuards *extension)
+{
+	gboolean enabled;
+
+	g_return_val_if_fail (E_IS_SOURCE_REVISION_GUARDS (extension), FALSE);
+
+	g_mutex_lock (&extension->priv->property_lock);
+	enabled = extension->priv->enabled;
+	g_mutex_unlock (&extension->priv->property_lock);
+
+	return enabled;
+}
diff --git a/libedataserver/e-source-revision-guards.h b/libedataserver/e-source-revision-guards.h
new file mode 100644
index 0000000..fadf318
--- /dev/null
+++ b/libedataserver/e-source-revision-guards.h
@@ -0,0 +1,94 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+/* e-source-revision-guards.h - Revision Guard Configuration.
+ *
+ * Copyright (C) 2013 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * 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
+ * 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., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Authors: Tristan Van Berkom <tristanvb openismus com>
+ */
+
+#if !defined (__LIBEDATASERVER_H_INSIDE__) && !defined (LIBEDATASERVER_COMPILATION)
+#error "Only <libedataserver/libedataserver.h> should be included directly."
+#endif
+
+#ifndef E_SOURCE_REVISION_GUARDS_H
+#define E_SOURCE_REVISION_GUARDS_H
+
+#include <libedataserver/e-source-extension.h>
+
+/* Standard GObject macros */
+#define E_TYPE_SOURCE_REVISION_GUARDS \
+	(e_source_revision_guards_get_type ())
+#define E_SOURCE_REVISION_GUARDS(obj) \
+	(G_TYPE_CHECK_INSTANCE_CAST \
+	((obj), E_TYPE_SOURCE_REVISION_GUARDS, ESourceRevisionGuards))
+#define E_SOURCE_REVISION_GUARDS_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_CAST \
+	((cls), E_TYPE_SOURCE_REVISION_GUARDS, ESourceRevisionGuardsClass))
+#define E_IS_SOURCE_REVISION_GUARDS(obj) \
+	(G_TYPE_CHECK_INSTANCE_TYPE \
+	((obj), E_TYPE_SOURCE_REVISION_GUARDS))
+#define E_IS_SOURCE_REVISION_GUARDS_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_TYPE \
+	((cls), E_TYPE_SOURCE_REVISION_GUARDS))
+#define E_SOURCE_REVISION_GUARDS_GET_CLASS(obj) \
+	(G_TYPE_INSTANCE_GET_CLASS \
+	((obj), E_TYPE_SOURCE_REVISION_GUARDS, ESourceRevisionGuardsClass))
+
+/**
+ * E_SOURCE_EXTENSION_REVISION_GUARDS:
+ *
+ * Pass this extension name to e_source_get_extension() to access
+ * #ESourceRevisionGuards.  This is also used as a group name in key files.
+ *
+ * Since: 3.8
+ **/
+#define E_SOURCE_EXTENSION_REVISION_GUARDS "Revision Guards"
+
+G_BEGIN_DECLS
+
+typedef struct _ESourceRevisionGuards ESourceRevisionGuards;
+typedef struct _ESourceRevisionGuardsClass ESourceRevisionGuardsClass;
+typedef struct _ESourceRevisionGuardsPrivate ESourceRevisionGuardsPrivate;
+
+/**
+ * ESourceRevisionGuards:
+ *
+ * Contains only private data that should be read and manipulated using the
+ * functions below.
+ *
+ * Since: 3.8
+ **/
+struct _ESourceRevisionGuards {
+	ESourceExtension parent;
+	ESourceRevisionGuardsPrivate *priv;
+};
+
+struct _ESourceRevisionGuardsClass {
+	ESourceExtensionClass parent_class;
+};
+
+GType           e_source_revision_guards_get_type     (void);
+
+void            e_source_revision_guards_set_enabled  (ESourceRevisionGuards  *extension,
+						       gboolean                enabled);
+gboolean        e_source_revision_guards_get_enabled  (ESourceRevisionGuards  *extension);
+
+
+G_END_DECLS
+
+#endif /* E_SOURCE_REVISION_GUARDS_H */
diff --git a/libedataserver/libedataserver.h b/libedataserver/libedataserver.h
index 8ee2993..b2ebe2a 100644
--- a/libedataserver/libedataserver.h
+++ b/libedataserver/libedataserver.h
@@ -61,6 +61,7 @@
 #include <libedataserver/e-source-refresh.h>
 #include <libedataserver/e-source-registry.h>
 #include <libedataserver/e-source-resource.h>
+#include <libedataserver/e-source-revision-guards.h>
 #include <libedataserver/e-source-security.h>
 #include <libedataserver/e-source-selectable.h>
 #include <libedataserver/e-source-smime.h>