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/*
* gnome_screensaver.c v0.0.7
*
* Enable/Disable the GNOME screensaver
* Supports GNOME screensaver API 2.14 and 2.15
* Supports GNOME SessionManager API
*
* Call gnome_screensaver_control(1) to enable and
* gnome_screensaver_control(0) to disable
*
*/
/*
* Orginally written for mplayer by Piotr Kaczuba
* (http://lists.mplayerhq.hu/pipermail/mplayer-dev-eng/2006-April/042661.html)
*
* Modified for xineliboutput by Alex Stansfield
* (http://www.linuxtv.org/pipermail/vdr/2007-July/013458.html)
*
* GNOME SessionManager support by Timo Eskola.
*/
#include <stdlib.h>
#include <unistd.h>
#include <dbus/dbus-glib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "../features.h"
#ifdef HAVE_MCE_DBUS_NAMES
# include <mce/dbus-names.h>
#endif
#define LOG_MODULENAME "[scrnsaver] "
#include "../logdefs.h"
#include "gnome_screensaver.h"
#define GS_SERVICE "org.gnome.ScreenSaver"
#define GS_PATH "/org/gnome/ScreenSaver"
#define GS_INTERFACE "org.gnome.ScreenSaver"
#define SM_SERVICE "org.gnome.SessionManager"
#define SM_PATH "/org/gnome/SessionManager"
#define SM_INTERFACE "org.gnome.SessionManager"
#define GS_APPLICATION_NAME "vdr-sxfe"
#define GS_REASON_FOR_INHIBIT "Watching TV"
/* Log Messages */
#define MSG_OpenBusConnectionError "Failed to open connection to bus: %s"
#define MSG_RemoteMethodException "Caught remote method exception %s: %s"
#define MSG_GnomeAPI215Failed "GNOME screensaver 2.15 API failed, trying 2.14 API"
#define MSG_GError "Error: %s"
#define MSG_GNOMEScreensaverEnabled "GNOME screensaver enabled"
#define MSG_GNOMEScreensaverDisabled "GNOME screensaver disabled"
#define MSG_MCEScreensaverEnabled "MCE screensaver enabled"
#define MSG_MCEScreensaverDisabled "MCE screensaver disabled"
static guint32 cookie;
static int gnome_sessionmanager_control(DBusGConnection *connection, int enable)
{
GError *error;
DBusGProxy *proxy;
gboolean ret;
/* Create a proxy object */
proxy = dbus_g_proxy_new_for_name(connection,
SM_SERVICE, SM_PATH, SM_INTERFACE);
if (!proxy) {
LOGDBG("Failed to get a proxy for " SM_SERVICE);
return 0;
}
error = NULL;
if (enable) {
ret = dbus_g_proxy_call(proxy, "Uninhibit", &error,
G_TYPE_UINT, cookie,
G_TYPE_INVALID, G_TYPE_INVALID);
} else {
ret = dbus_g_proxy_call(proxy, "Inhibit", &error,
G_TYPE_STRING, GS_APPLICATION_NAME,
G_TYPE_UINT, 0,
G_TYPE_STRING, GS_REASON_FOR_INHIBIT,
G_TYPE_UINT, 12,
G_TYPE_INVALID,
G_TYPE_UINT, &cookie,
G_TYPE_INVALID);
}
g_object_unref(proxy);
if (!ret) {
/* Check if it's a remote exception or a regular GError */
if (error->domain == DBUS_GERROR &&
error->code == DBUS_GERROR_REMOTE_EXCEPTION) {
LOGMSG(MSG_RemoteMethodException, dbus_g_error_get_name(error), error->message);
} else {
LOGMSG(MSG_GError, error->message);
}
g_error_free(error);
return 0;
}
LOGMSG(enable ? MSG_GNOMEScreensaverEnabled : MSG_GNOMEScreensaverDisabled);
return 1;
}
#ifdef HAVE_MCE_DBUS_NAMES
static int mce_control(DBusGConnection *connection, int enable)
{
GError *error;
DBusGProxy *proxy;
gboolean ret = 1;
/* Create a proxy object */
proxy = dbus_g_proxy_new_for_name(connection,
MCE_SERVICE, MCE_REQUEST_PATH, MCE_REQUEST_IF);
if (!proxy) {
LOGDBG("Failed to get a proxy for " SM_SERVICE);
return 0;
}
error = NULL;
if (enable) {
ret = dbus_g_proxy_call(proxy, MCE_CANCEL_PREVENT_BLANK_REQ, &error,
G_TYPE_INVALID, G_TYPE_INVALID);
} else {
ret = dbus_g_proxy_call(proxy, MCE_PREVENT_BLANK_REQ, &error,
G_TYPE_INVALID, G_TYPE_INVALID);
}
g_object_unref(proxy);
if (!ret) {
/* Check if it's a remote exception or a regular GError */
if (error->domain == DBUS_GERROR &&
error->code == DBUS_GERROR_REMOTE_EXCEPTION) {
LOGMSG(MSG_RemoteMethodException, dbus_g_error_get_name(error), error->message);
} else {
LOGMSG(MSG_GError, error->message);
}
g_error_free(error);
return 0;
}
LOGMSG(enable ? MSG_MCEScreensaverEnabled : MSG_MCEScreensaverDisabled);
return 1;
}
#endif
void gnome_screensaver_control(int enable)
{
DBusGConnection *connection;
GError *error;
DBusGProxy *proxy;
gboolean ret;
#ifdef GLIB_CHECK_VERSION
#if !GLIB_CHECK_VERSION(2,35,0)
g_type_init();
#endif
#endif
#ifdef HAVE_MCE_DBUS_NAMES
error = NULL;
connection = dbus_g_bus_get(DBUS_BUS_SYSTEM, &error);
if (!connection) {
LOGMSG(MSG_OpenBusConnectionError, error ? error->message : "<null>");
g_error_free(error);
} else if (mce_control(connection, enable)) {
return;
}
#endif
/* Get a connection to the session bus */
error = NULL;
connection = dbus_g_bus_get(DBUS_BUS_SESSION, &error);
if (!connection) {
LOGMSG(MSG_OpenBusConnectionError, error ? error->message : "<null>");
g_error_free(error);
return;
}
/* try session manager interface first */
if (gnome_sessionmanager_control(connection, enable))
return;
/* Create a proxy object */
proxy = dbus_g_proxy_new_for_name(connection,
GS_SERVICE, GS_PATH, GS_INTERFACE);
if (!proxy) {
LOGDBG("Failed to get a proxy for " GS_SERVICE);
return;
}
error = NULL;
/* Enable the screensaver */
if (enable) {
/* First call the GNOME screensaver 2.15 API method */
ret =
dbus_g_proxy_call(proxy, "UnInhibit", &error,
G_TYPE_UINT, cookie,
G_TYPE_INVALID, G_TYPE_INVALID);
/* If this fails, try the GNOME screensaver 2.14 API */
if (!ret && error->domain == DBUS_GERROR
&& error->code == DBUS_GERROR_UNKNOWN_METHOD) {
LOGMSG(MSG_GnomeAPI215Failed);
g_error_free(error);
error = NULL;
ret =
dbus_g_proxy_call(proxy, "AllowActivation", &error,
G_TYPE_INVALID, G_TYPE_INVALID);
}
}
/* Disable the screensaver */
else {
/* First call the GNOME screensaver 2.15 API method */
ret =
dbus_g_proxy_call(proxy, "Inhibit", &error,
G_TYPE_STRING, GS_APPLICATION_NAME,
G_TYPE_STRING, GS_REASON_FOR_INHIBIT,
G_TYPE_INVALID,
G_TYPE_UINT, &cookie,
G_TYPE_INVALID);
/* If this fails, try the GNOME screensaver 2.14 API */
if (!ret && error->domain == DBUS_GERROR
&& error->code == DBUS_GERROR_UNKNOWN_METHOD) {
LOGMSG(MSG_GnomeAPI215Failed);
g_error_free(error);
error = NULL;
ret =
dbus_g_proxy_call(proxy, "InhibitActivation", &error,
G_TYPE_STRING, GS_REASON_FOR_INHIBIT,
G_TYPE_INVALID, G_TYPE_INVALID);
}
}
if (!ret) {
/* Check if it's a remote exception or a regular GError */
if (error->domain == DBUS_GERROR
&& error->code == DBUS_GERROR_REMOTE_EXCEPTION) {
LOGMSG(MSG_RemoteMethodException, dbus_g_error_get_name(error), error->message);
}
else {
LOGMSG(MSG_GError, error->message);
}
g_error_free(error);
}
else {
LOGMSG(enable ? MSG_GNOMEScreensaverEnabled : MSG_GNOMEScreensaverDisabled);
}
g_object_unref(proxy);
}
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