1 files changed, 301 insertions, 0 deletions
diff --git a/src/egg-dbus-proxy.c b/src/egg-dbus-proxy.c
new file mode 100644
index 0000000..8490682
--- /dev/null
+++ b/src/egg-dbus-proxy.c
@@ -0,0 +1,301 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2006-2008 Richard Hughes <[email protected]>
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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.
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <dbus/dbus-glib.h>
+
+#include "egg-debug.h"
+#include "egg-dbus-monitor.h"
+#include "egg-dbus-proxy.h"
+
+static void     egg_dbus_proxy_finalize   (GObject        *object);
+
+#define EGG_DBUS_PROXY_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), EGG_TYPE_DBUS_PROXY, EggDbusProxyPrivate))
+
+/* this is a managed proxy, i.e. a proxy that handles messagebus and DBUS service restarts. */
+struct EggDbusProxyPrivate
+{
+	gchar			*service;
+	gchar			*interface;
+	gchar			*path;
+	DBusGProxy		*proxy;
+	EggDbusMonitor		*monitor;
+	gboolean		 assigned;
+	DBusGConnection		*connection;
+	gulong			 monitor_callback_id;
+};
+
+enum {
+	PROXY_STATUS,
+	LAST_SIGNAL
+};
+
+static guint	     signals [LAST_SIGNAL] = { 0 };
+
+G_DEFINE_TYPE (EggDbusProxy, egg_dbus_proxy, G_TYPE_OBJECT)
+
+/**
+ * egg_dbus_proxy_connect:
+ * @proxy: This class instance
+ * Return value: success
+ **/
+static gboolean
+egg_dbus_proxy_connect (EggDbusProxy *proxy)
+{
+	GError *error = NULL;
+
+	g_return_val_if_fail (EGG_IS_DBUS_PROXY (proxy), FALSE);
+
+	/* are already connected? */
+	if (proxy->priv->proxy != NULL) {
+		egg_debug ("already connected to %s", proxy->priv->service);
+		return FALSE;
+	}
+
+	proxy->priv->proxy = dbus_g_proxy_new_for_name_owner (proxy->priv->connection,
+							      proxy->priv->service,
+							      proxy->priv->path,
+							      proxy->priv->interface,
+							      &error);
+	/* check for any possible error */
+	if (error) {
+		egg_warning ("DBUS error: %s", error->message);
+		g_error_free (error);
+		proxy->priv->proxy = NULL;
+	}
+
+	/* shouldn't be, but make sure proxy valid */
+	if (proxy->priv->proxy == NULL) {
+		egg_debug ("proxy is NULL, maybe the daemon responsible "
+			   "for %s is not running?", proxy->priv->service);
+		return FALSE;
+	}
+
+	g_signal_emit (proxy, signals [PROXY_STATUS], 0, TRUE);
+
+	return TRUE;
+}
+
+/**
+ * egg_dbus_proxy_disconnect:
+ * @proxy: This class instance
+ * Return value: success
+ **/
+static gboolean
+egg_dbus_proxy_disconnect (EggDbusProxy *proxy)
+{
+	g_return_val_if_fail (EGG_IS_DBUS_PROXY (proxy), FALSE);
+
+	/* are already disconnected? */
+	if (proxy->priv->proxy == NULL) {
+		if (proxy->priv->service)
+			egg_debug ("already disconnected from %s", proxy->priv->service);
+		else 
+			egg_debug ("already disconnected.");
+		return FALSE;
+	}
+
+	g_signal_emit (proxy, signals [PROXY_STATUS], 0, FALSE);
+
+	g_object_unref (proxy->priv->proxy);
+	proxy->priv->proxy = NULL;
+
+	return TRUE;
+}
+
+/**
+ * dbus_monitor_connection_cb:
+ * @proxy: The dbus raw proxy
+ * @status: The status of the service, where TRUE is connected
+ * @screensaver: This class instance
+ **/
+static void
+dbus_monitor_connection_cb (EggDbusMonitor *monitor, gboolean status, EggDbusProxy *proxy)
+{
+	g_return_if_fail (EGG_IS_DBUS_PROXY (proxy));
+	if (proxy->priv->assigned == FALSE)
+		return;
+	if (status)
+		egg_dbus_proxy_connect (proxy);
+	else
+		egg_dbus_proxy_disconnect (proxy);
+}
+
+/**
+ * egg_dbus_proxy_assign:
+ * @proxy: This class instance
+ * @connections: The bus connection
+ * @service: The DBUS service name
+ * @interface: The DBUS interface
+ * @path: The DBUS path
+ * Return value: The DBUS proxy, or NULL if we haven't connected yet.
+ **/
+DBusGProxy *
+egg_dbus_proxy_assign (EggDbusProxy *proxy, DBusGConnection *connection,
+		       const gchar *service, const gchar *path, const gchar *interface)
+{
+	g_return_val_if_fail (EGG_IS_DBUS_PROXY (proxy), NULL);
+	g_return_val_if_fail (connection != NULL, NULL);
+	g_return_val_if_fail (service != NULL, NULL);
+	g_return_val_if_fail (interface != NULL, NULL);
+	g_return_val_if_fail (path != NULL, NULL);
+
+	if (proxy->priv->assigned) {
+		egg_warning ("already assigned proxy!");
+		return NULL;
+	}
+
+	proxy->priv->service = g_strdup (service);
+	proxy->priv->interface = g_strdup (interface);
+	proxy->priv->path = g_strdup (path);
+	proxy->priv->connection = connection;
+	proxy->priv->assigned = TRUE;
+
+	/* We have to save the connection and remove the signal id later as
+	   instances of this object are likely to be registering with a
+	   singleton object many times */
+	egg_dbus_monitor_assign (proxy->priv->monitor, connection, service);
+
+	/* try to connect and return proxy (or NULL if invalid) */
+	egg_dbus_proxy_connect (proxy);
+
+	return proxy->priv->proxy;
+}
+
+/**
+ * egg_dbus_proxy_get_proxy:
+ * @proxy: This class instance
+ * Return value: The DBUS proxy, or NULL if we are not connected
+ **/
+DBusGProxy *
+egg_dbus_proxy_get_proxy (EggDbusProxy *proxy)
+{
+	g_return_val_if_fail (EGG_IS_DBUS_PROXY (proxy), NULL);
+	if (proxy->priv->assigned == FALSE)
+		return NULL;
+	return proxy->priv->proxy;
+}
+
+/**
+ * egg_dbus_proxy_is_connected:
+ * @proxy: This class instance
+ * Return value: if we are connected to a valid proxy
+ **/
+gboolean
+egg_dbus_proxy_is_connected (EggDbusProxy *proxy)
+{
+	g_return_val_if_fail (EGG_IS_DBUS_PROXY (proxy), FALSE);
+	if (proxy->priv->assigned == FALSE)
+		return FALSE;
+	if (proxy->priv->proxy == NULL)
+		return FALSE;
+	return TRUE;
+}
+
+/**
+ * egg_dbus_proxy_class_init:
+ * @proxy: This class instance
+ **/
+static void
+egg_dbus_proxy_class_init (EggDbusProxyClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+	object_class->finalize = egg_dbus_proxy_finalize;
+	g_type_class_add_private (klass, sizeof (EggDbusProxyPrivate));
+
+	signals [PROXY_STATUS] =
+		g_signal_new ("proxy-status",
+			      G_TYPE_FROM_CLASS (object_class),
+			      G_SIGNAL_RUN_LAST,
+			      G_STRUCT_OFFSET (EggDbusProxyClass, proxy_status),
+			      NULL, NULL,
+			      g_cclosure_marshal_VOID__BOOLEAN,
+			      G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
+}
+
+/**
+ * egg_dbus_proxy_init:
+ * @egg_dbus_proxy: This class instance
+ **/
+static void
+egg_dbus_proxy_init (EggDbusProxy *proxy)
+{
+	proxy->priv = EGG_DBUS_PROXY_GET_PRIVATE (proxy);
+
+	proxy->priv->connection = NULL;
+	proxy->priv->proxy = NULL;
+	proxy->priv->service = NULL;
+	proxy->priv->interface = NULL;
+	proxy->priv->path = NULL;
+	proxy->priv->assigned = FALSE;
+	proxy->priv->monitor = egg_dbus_monitor_new ();
+	proxy->priv->monitor_callback_id =
+		g_signal_connect (proxy->priv->monitor, "connection-changed",
+				  G_CALLBACK (dbus_monitor_connection_cb), proxy);
+	proxy->priv->monitor_callback_id = 0;
+}
+
+/**
+ * egg_dbus_proxy_finalize:
+ * @object: This class instance
+ **/
+static void
+egg_dbus_proxy_finalize (GObject *object)
+{
+	EggDbusProxy *proxy;
+	g_return_if_fail (object != NULL);
+	g_return_if_fail (EGG_IS_DBUS_PROXY (object));
+
+	proxy = EGG_DBUS_PROXY (object);
+	proxy->priv = EGG_DBUS_PROXY_GET_PRIVATE (proxy);
+
+	if (proxy->priv->monitor_callback_id != 0)
+		g_signal_handler_disconnect (proxy->priv->monitor,
+					     proxy->priv->monitor_callback_id);
+
+	egg_dbus_proxy_disconnect (proxy);
+
+	if (proxy->priv->proxy != NULL)
+		g_object_unref (proxy->priv->proxy);
+	g_object_unref (proxy->priv->monitor);
+	g_free (proxy->priv->service);
+	g_free (proxy->priv->interface);
+	g_free (proxy->priv->path);
+
+	G_OBJECT_CLASS (egg_dbus_proxy_parent_class)->finalize (object);
+}
+
+/**
+ * egg_dbus_proxy_new:
+ * Return value: new class instance.
+ **/
+EggDbusProxy *
+egg_dbus_proxy_new (void)
+{
+	EggDbusProxy *proxy;
+	proxy = g_object_new (EGG_TYPE_DBUS_PROXY, NULL);
+	return EGG_DBUS_PROXY (proxy);
+}
+