A lib/ephy-dbus.c: A lib/ephy-dbus.h:

2005-01-10  Christian Persch  <chpe@cvs.gnome.org>

	* configure.ac:
	* lib/Makefile.am:
	A lib/ephy-dbus.c:
	A lib/ephy-dbus.h:
	* lib/ephy-marshal.list:
	* src/Makefile.am:
	* src/ephy-shell.c: (ephy_shell_finalize),
	(ephy_shell_get_dbus_service):
	* src/ephy-shell.h:

	Add experimental dbus service, disabled by default. Configure with
	--enable-dbus to enable.

1 files changed, 398 insertions, 0 deletions

diff --git a/lib/ephy-dbus.c b/lib/ephy-dbus.c
new file mode 100644
index 000000000..3b76b0614
--- /dev/null
+++ b/lib/ephy-dbus.c
@@ -0,0 +1,398 @@
+/*
+ *  Copyright (C) 2004, 2005 Jean-François Rameau
+ *
+ *  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, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ *  $Id$
+ */
+
+#include "config.h"
+
+#include "ephy-dbus.h"
+#include "ephy-lib-type-builtins.h"
+#include "ephy-marshal.h"
+#include "ephy-debug.h"
+
+#define EPHY_DBUS_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_DBUS, EphyDbusPrivate))
+
+struct _EphyDbusPrivate
+{
+	DBusConnection *session_bus;
+	DBusConnection *system_bus;
+	guint reconnect_timeout_id;
+};
+
+enum
+{
+	CONNECTED,
+	DISCONNECTED,
+	LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
+static GObjectClass *parent_class = NULL;
+
+/* Epiphany's DBUS identification */
+static const char* epiphany_dbus_service     = "org.gnome.Epiphany";
+static const char* epiphany_dbus_object_path = "/org/gnome/Epiphany";
+
+/* This function is called by DBUS when a message directed at the
+ * Epiphany's object path arrives (provided we're the registered instance!)
+ * it routes the message to the correct handler
+ */
+static DBusHandlerResult path_message_func (DBusConnection *connection,
+					    DBusMessage *message,
+					    gpointer data);
+
+/* Filter signals form session bus */
+static DBusHandlerResult session_filter_func (DBusConnection *connection,
+				              DBusMessage *message,
+				              void *user_data);
+/* Filter signals from system bus */
+static DBusHandlerResult system_filter_func (DBusConnection *connection,
+				             DBusMessage *message,
+				             void *user_data);
+
+/* Both  connect to their respective bus */
+static void ephy_dbus_connect_to_session_bus (EphyDbus *dbus);
+static void ephy_dbus_connect_to_system_bus  (EphyDbus *dbus);
+
+static DBusObjectPathVTable call_vtable = {
+  NULL,
+  path_message_func,
+  NULL,
+};
+
+/* implementation of the DBUS helpers */
+
+static gboolean
+ephy_dbus_connect_to_session_bus_cb (gpointer user_data)
+{
+	EphyDbus *dbus = EPHY_DBUS (user_data);
+	gboolean success;
+
+	ephy_dbus_connect_to_session_bus (dbus);
+
+	success = (dbus->priv->session_bus != NULL);
+	if (success)
+	{
+		dbus->priv->reconnect_timeout_id = 0;
+	}
+
+	return !success;
+}
+
+static gboolean
+ephy_dbus_connect_to_system_bus_cb (gpointer user_data)
+{
+	EphyDbus *dbus = EPHY_DBUS (user_data);
+
+	ephy_dbus_connect_to_system_bus (dbus);
+
+	return dbus->priv->system_bus != NULL;
+}
+
+static DBusHandlerResult
+session_filter_func (DBusConnection *connection,
+	     	     DBusMessage *message,
+	     	     void *user_data)
+{
+	EphyDbus *dbus = EPHY_DBUS (user_data);
+
+	if (dbus_message_is_signal (message,
+				    DBUS_INTERFACE_ORG_FREEDESKTOP_LOCAL,
+				    "Disconnected"))
+	{
+		LOG ("EphyDbus disconnected from session bus")
+
+		dbus_connection_unref (dbus->priv->session_bus);
+		dbus->priv->session_bus = NULL;
+
+		g_signal_emit (dbus, signals[DISCONNECTED], 0, EPHY_DBUS_SESSION);
+
+		/* try to reconnect later ... */
+		dbus->priv->reconnect_timeout_id =
+			g_timeout_add (3000, (GSourceFunc) ephy_dbus_connect_to_session_bus_cb, dbus);
+
+		return DBUS_HANDLER_RESULT_HANDLED;
+	}
+
+	return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+}
+
+static DBusHandlerResult
+system_filter_func (DBusConnection *connection,
+	     	    DBusMessage *message,
+	     	    void *user_data)
+{
+	EphyDbus *dbus = EPHY_DBUS (user_data);
+
+	LOG ("EphyDbus filtering message from system bus")
+
+	if (dbus_message_is_signal (message,
+				    DBUS_INTERFACE_ORG_FREEDESKTOP_LOCAL,
+				    "Disconnected"))
+	{
+		LOG ("EphyDbus disconnected from system bus")
+
+		dbus_connection_unref (dbus->priv->system_bus);
+		dbus->priv->system_bus = NULL;
+
+		g_signal_emit (dbus, signals[DISCONNECTED], 0, EPHY_DBUS_SYSTEM);
+
+		/* try to reconnect later ... */
+		g_timeout_add (3000, ephy_dbus_connect_to_system_bus_cb, (gpointer)dbus);
+
+		return DBUS_HANDLER_RESULT_HANDLED;
+	}
+	return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+}
+
+static void
+ephy_dbus_connect_to_system_bus (EphyDbus *dbus)
+{
+	DBusConnection *bus;
+	DBusError	error;
+
+	LOG ("EphyDbus connecting to system DBUS")
+
+	dbus_error_init (&error);
+	bus = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
+	if (bus == NULL)
+	{
+		g_warning ("Failed to connect to the system D-BUS: %s", error.message);
+		dbus_error_free (&error);
+		return;
+	}
+	dbus_connection_setup_with_g_main (bus, NULL);
+
+	dbus_connection_add_filter (bus, system_filter_func, dbus, NULL);
+	dbus_bus_add_match (bus, 
+                            "type='signal',interface='org.freedesktop.NetworkManager'", 
+                            &error);
+	if (dbus_error_is_set(&error)) {
+		g_warning ("Couldn't register signal handler (system bus): %s: %s", 
+                           error.name, error.message);
+		return;
+	}
+
+	dbus->priv->system_bus = bus;
+
+	g_signal_emit (dbus, signals[CONNECTED], 0, EPHY_DBUS_SYSTEM);
+}
+
+static void
+ephy_dbus_connect_to_session_bus (EphyDbus *dbus)
+{
+	DBusError       error;
+	DBusConnection *bus;
+
+	LOG ("EphyDbus connecting to session DBUS")
+
+	dbus_error_init (&error);
+	bus = dbus_bus_get (DBUS_BUS_SESSION, &error);
+
+	if (!bus) {
+		g_warning ("EphyDbus failed to connect to the session D-BUS: %s", error.message);
+		dbus_error_free (&error);
+		return;
+	}
+
+	dbus_connection_add_filter (bus, session_filter_func, dbus, NULL);
+
+	dbus_bus_acquire_service (bus, epiphany_dbus_service, 0, &error);
+	if (dbus_error_is_set (&error)) {
+		g_warning ("EphyDbus failed to acquire epiphany service");
+		dbus_error_free (&error);
+		return;
+	}
+
+	dbus_connection_register_object_path (bus,
+					      epiphany_dbus_object_path,
+					      &call_vtable, dbus);
+
+	dbus_bus_acquire_service (bus, epiphany_dbus_service, 0, NULL);
+
+	dbus_connection_setup_with_g_main (bus, NULL);
+
+	dbus->priv->session_bus = bus;
+
+	g_signal_emit (dbus, signals[CONNECTED], 0, EPHY_DBUS_SESSION);
+}
+
+static void
+ephy_dbus_disconnect_bus (DBusConnection *bus)
+{
+	if (bus != NULL) {
+
+		dbus_connection_disconnect (bus);
+		dbus_connection_unref (bus);
+	}
+}
+
+static DBusHandlerResult
+path_message_func (DBusConnection *connection,
+                   DBusMessage *message,
+                   gpointer data)
+{
+	DBusHandlerResult result = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+
+	LOG ("EphyDbus filtering path messagefrom session bus")
+
+	if (dbus_message_is_method_call (message, epiphany_dbus_service, "load"))
+	{
+		result = DBUS_HANDLER_RESULT_HANDLED;
+	}
+
+	return result;
+}
+
+
+/* Public methods */
+
+void
+ephy_dbus_startup (EphyDbus *dbus)
+{
+	g_return_if_fail (EPHY_IS_DBUS (dbus));
+
+	LOG ("EphyDbus startup")
+
+	ephy_dbus_connect_to_session_bus (dbus);
+	ephy_dbus_connect_to_system_bus (dbus);
+}
+
+void
+ephy_dbus_shutdown (EphyDbus *dbus)
+{
+	g_return_if_fail (EPHY_IS_DBUS (dbus));
+
+	LOG ("EphyDbus shutdown")
+
+	if (dbus->priv->reconnect_timeout_id != 0)
+	{
+		g_source_remove (dbus->priv->reconnect_timeout_id);
+		dbus->priv->reconnect_timeout_id = 0;
+	}
+
+	ephy_dbus_disconnect_bus (dbus->priv->session_bus);
+	ephy_dbus_disconnect_bus (dbus->priv->system_bus);
+}
+
+DBusConnection *
+ephy_dbus_get_bus (EphyDbus *dbus,
+		   EphyDbusBus kind)
+{
+	DBusConnection *bus = NULL;
+
+	g_return_val_if_fail (EPHY_IS_DBUS (dbus), NULL);
+
+	switch (kind)
+	{
+		case EPHY_DBUS_SYSTEM:
+			bus = dbus->priv->system_bus;
+			break;
+		case EPHY_DBUS_SESSION:
+			bus = dbus->priv->session_bus;
+			break;
+		default:
+			bus = dbus->priv->session_bus;
+	}
+	return bus;
+}
+
+/* Class implementation */
+
+static void
+ephy_dbus_init (EphyDbus *dbus)
+{
+	dbus->priv = EPHY_DBUS_GET_PRIVATE (dbus);
+
+	LOG ("EphyDbus initialising")
+}
+
+static void
+ephy_dbus_finalize (GObject *object)
+{
+	EphyDbus *dbus = EPHY_DBUS (object);
+
+	ephy_dbus_shutdown (dbus);
+
+	LOG ("EphyDbus finalised")
+
+	parent_class->finalize (object);
+}
+
+static void
+ephy_dbus_class_init (EphyDbusClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+	parent_class = g_type_class_peek_parent (klass);
+
+	object_class->finalize = ephy_dbus_finalize;
+
+	signals[CONNECTED] =
+		g_signal_new ("connected",
+			      G_OBJECT_CLASS_TYPE (object_class),
+			      G_SIGNAL_RUN_FIRST,
+			      G_STRUCT_OFFSET (EphyDbusClass, connected),
+			      NULL, NULL,
+			      ephy_marshal_VOID__ENUM,
+			      G_TYPE_NONE,
+			      1,
+			      EPHY_TYPE_DBUS_BUS);
+
+	signals[DISCONNECTED] =
+		g_signal_new ("disconnected",
+			      G_OBJECT_CLASS_TYPE (object_class),
+			      G_SIGNAL_RUN_FIRST,
+			      G_STRUCT_OFFSET (EphyDbusClass, disconnected),
+			      NULL, NULL,
+			      ephy_marshal_VOID__ENUM,
+			      G_TYPE_NONE,
+			      1,
+			      EPHY_TYPE_DBUS_BUS);
+
+	g_type_class_add_private (object_class, sizeof(EphyDbusPrivate));
+}
+
+GType
+ephy_dbus_get_type (void)
+{
+	static GType type = 0;
+
+	if (G_UNLIKELY (type == 0))
+	{
+		static const GTypeInfo our_info =
+		{
+			sizeof (EphyDbusClass),
+			NULL, /* base_init */
+			NULL, /* base_finalize */
+			(GClassInitFunc) ephy_dbus_class_init,
+			NULL,
+			NULL, /* class_data */
+			sizeof (EphyDbus),
+			0, /* n_preallocs */
+			(GInstanceInitFunc) ephy_dbus_init
+		};
+
+		type = g_type_register_static (G_TYPE_OBJECT,
+					       "EphyDbus",
+					       &our_info, 0);
+	}
+
+	return type;
+}