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mutter/src/backends/meta-remote-desktop.c
Jonas Ådahl e502adfa04 remote-desktop, screen-cast: Add version number to D-Bus APIs 
In order to let applications gracefully handle version mismatches, add
a version property to the APIs. Also add a warning on the APIs that
these are not meant for public consumption.
2018-02-23 19:33:31 +08:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright (C) 2015-2017 Red Hat Inc.
*
* 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., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
*/
#define _GNU_SOURCE
#include "config.h"
#include "backends/meta-remote-desktop.h"
#include <errno.h>
#include <glib.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include "meta-dbus-remote-desktop.h"
#include "backends/meta-backend-private.h"
#include "backends/meta-cursor-renderer.h"
#include "backends/meta-remote-desktop-session.h"
#include "backends/native/meta-cursor-renderer-native.h"
#include "meta/errors.h"
#include "meta/meta-backend.h"
#define META_REMOTE_DESKTOP_DBUS_SERVICE "org.gnome.Mutter.RemoteDesktop"
#define META_REMOTE_DESKTOP_DBUS_PATH "/org/gnome/Mutter/RemoteDesktop"
#define META_REMOTE_DESKTOP_API_VERSION 1
typedef enum _MetaRemoteDesktopDeviceTypes
{
META_REMOTE_DESKTOP_DEVICE_TYPE_NONE = 0,
META_REMOTE_DESKTOP_DEVICE_TYPE_KEYBOARD = 1 << 0,
META_REMOTE_DESKTOP_DEVICE_TYPE_POINTER = 1 << 1,
META_REMOTE_DESKTOP_DEVICE_TYPE_TOUCHSCREEN = 1 << 2,
} MetaRemoteDesktopDeviceTypes;
struct _MetaRemoteDesktop
{
MetaDBusRemoteDesktopSkeleton parent;
int dbus_name_id;
GHashTable *sessions;
MetaDbusSessionWatcher *session_watcher;
};
static void
meta_remote_desktop_init_iface (MetaDBusRemoteDesktopIface *iface);
G_DEFINE_TYPE_WITH_CODE (MetaRemoteDesktop,
meta_remote_desktop,
META_DBUS_TYPE_REMOTE_DESKTOP_SKELETON,
G_IMPLEMENT_INTERFACE (META_DBUS_TYPE_REMOTE_DESKTOP,
meta_remote_desktop_init_iface));
GDBusConnection *
meta_remote_desktop_get_connection (MetaRemoteDesktop *remote_desktop)
{
GDBusInterfaceSkeleton *interface_skeleton =
G_DBUS_INTERFACE_SKELETON (remote_desktop);
return g_dbus_interface_skeleton_get_connection (interface_skeleton);
}
MetaRemoteDesktopSession *
meta_remote_desktop_get_session (MetaRemoteDesktop *remote_desktop,
const char *session_id)
{
return g_hash_table_lookup (remote_desktop->sessions, session_id);
}
static void
on_session_closed (MetaRemoteDesktopSession *session,
MetaRemoteDesktop *remote_desktop)
{
char *session_id;
session_id = meta_remote_desktop_session_get_session_id (session);
g_hash_table_remove (remote_desktop->sessions, session_id);
}
static gboolean
handle_create_session (MetaDBusRemoteDesktop *skeleton,
GDBusMethodInvocation *invocation)
{
MetaRemoteDesktop *remote_desktop = META_REMOTE_DESKTOP (skeleton);
const char *peer_name;
MetaRemoteDesktopSession *session;
GError *error = NULL;
char *session_id;
char *session_path;
const char *client_dbus_name;
peer_name = g_dbus_method_invocation_get_sender (invocation);
session = meta_remote_desktop_session_new (remote_desktop,
peer_name,
&error);
if (!session)
{
g_warning ("Failed to create remote desktop session: %s",
error->message);
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_FAILED,
"Failed to create session: %s",
error->message);
g_error_free (error);
return TRUE;
}
session_id = meta_remote_desktop_session_get_session_id (session);
g_hash_table_insert (remote_desktop->sessions,
session_id,
session);
client_dbus_name = g_dbus_method_invocation_get_sender (invocation);
meta_dbus_session_watcher_watch_session (remote_desktop->session_watcher,
client_dbus_name,
META_DBUS_SESSION (session));
session_path = meta_remote_desktop_session_get_object_path (session);
meta_dbus_remote_desktop_complete_create_session (skeleton,
invocation,
session_path);
g_signal_connect (session, "session-closed",
G_CALLBACK (on_session_closed),
remote_desktop);
return TRUE;
}
static void
meta_remote_desktop_init_iface (MetaDBusRemoteDesktopIface *iface)
{
iface->handle_create_session = handle_create_session;
}
static void
on_bus_acquired (GDBusConnection *connection,
const char *name,
gpointer user_data)
{
MetaRemoteDesktop *remote_desktop = user_data;
GDBusInterfaceSkeleton *interface_skeleton =
G_DBUS_INTERFACE_SKELETON (remote_desktop);
GError *error = NULL;
if (!g_dbus_interface_skeleton_export (interface_skeleton,
connection,
META_REMOTE_DESKTOP_DBUS_PATH,
&error))
g_warning ("Failed to export remote desktop object: %s\n", error->message);
}
static void
on_name_acquired (GDBusConnection *connection,
const char *name,
gpointer user_data)
{
g_info ("Acquired name %s\n", name);
}
static void
on_name_lost (GDBusConnection *connection,
const char *name,
gpointer user_data)
{
g_warning ("Lost or failed to acquire name %s\n", name);
}
static void
meta_remote_desktop_constructed (GObject *object)
{
MetaRemoteDesktop *remote_desktop = META_REMOTE_DESKTOP (object);
remote_desktop->dbus_name_id =
g_bus_own_name (G_BUS_TYPE_SESSION,
META_REMOTE_DESKTOP_DBUS_SERVICE,
G_BUS_NAME_OWNER_FLAGS_NONE,
on_bus_acquired,
on_name_acquired,
on_name_lost,
remote_desktop,
NULL);
}
static void
meta_remote_desktop_finalize (GObject *object)
{
MetaRemoteDesktop *remote_desktop = META_REMOTE_DESKTOP (object);
GList *sessions;
if (remote_desktop->dbus_name_id != 0)
g_bus_unown_name (remote_desktop->dbus_name_id);
sessions = g_list_copy (g_hash_table_get_values (remote_desktop->sessions));
g_list_free_full (sessions,
(GDestroyNotify) meta_remote_desktop_session_close);
g_hash_table_destroy (remote_desktop->sessions);
G_OBJECT_CLASS (meta_remote_desktop_parent_class)->finalize (object);
}
MetaRemoteDesktop *
meta_remote_desktop_new (MetaDbusSessionWatcher *session_watcher)
{
MetaRemoteDesktop *remote_desktop;
remote_desktop = g_object_new (META_TYPE_REMOTE_DESKTOP, NULL);
remote_desktop->session_watcher = session_watcher;
return remote_desktop;
}
static MetaRemoteDesktopDeviceTypes
calculate_supported_device_types (void)
{
ClutterDeviceManager *device_manager =
clutter_device_manager_get_default ();
ClutterVirtualDeviceType device_types;
MetaRemoteDesktopDeviceTypes supported_devices =
META_REMOTE_DESKTOP_DEVICE_TYPE_NONE;
device_types =
clutter_device_manager_get_supported_virtual_device_types (device_manager);
if (device_types & CLUTTER_VIRTUAL_DEVICE_TYPE_KEYBOARD)
supported_devices |= META_REMOTE_DESKTOP_DEVICE_TYPE_KEYBOARD;
if (device_types & CLUTTER_VIRTUAL_DEVICE_TYPE_POINTER)
supported_devices |= META_REMOTE_DESKTOP_DEVICE_TYPE_POINTER;
if (device_types & CLUTTER_VIRTUAL_DEVICE_TYPE_TOUCHSCREEN)
supported_devices |= META_REMOTE_DESKTOP_DEVICE_TYPE_TOUCHSCREEN;
return supported_devices;
}
static void
meta_remote_desktop_init (MetaRemoteDesktop *remote_desktop)
{
remote_desktop->sessions = g_hash_table_new (g_str_hash, g_str_equal);
meta_dbus_remote_desktop_set_supported_device_types (
META_DBUS_REMOTE_DESKTOP (remote_desktop),
calculate_supported_device_types ());
meta_dbus_remote_desktop_set_version (
META_DBUS_REMOTE_DESKTOP (remote_desktop),
META_REMOTE_DESKTOP_API_VERSION);
}
static void
meta_remote_desktop_class_init (MetaRemoteDesktopClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->constructed = meta_remote_desktop_constructed;
object_class->finalize = meta_remote_desktop_finalize;
}
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