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authorStefano Karapetsas <[email protected]>2011-12-11 12:55:19 +0100
committerStefano Karapetsas <[email protected]>2011-12-11 12:55:19 +0100
commit51175189c6d7313a3b84019e39496f957c4e6164 (patch)
treee4c2c130fa3140bca28685ef900f04a012e53dcd /src/egg-dbus-proxy.c
downloadmate-power-manager-51175189c6d7313a3b84019e39496f957c4e6164.tar.bz2
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moved from Mate-Extra
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+/* -*- 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);
+}
+
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