Add support for freeze suspend state

tdecore/tdehw/hwlibdaemons/dbus/tde_dbus_hardwarecontrol.c

@@ -356,6 +356,12 @@ void reply_Introspect(DBusMessage* msg, DBusConnection* conn) {
 			"    <method name=\"Standby\">\n"
 			"      <arg name=\"value\" direction=\"out\" type=\"b\" />\n"
 			"    </method>\n"
+			"    <method name=\"CanFreeze\">\n"
+			"      <arg name=\"value\" direction=\"out\" type=\"b\" />\n"
+			"    </method>\n"
+			"    <method name=\"Freeze\">\n"
+			"      <arg name=\"value\" direction=\"out\" type=\"b\" />\n"
+			"    </method>\n"
 			"    <method name=\"CanSuspend\">\n"
 			"      <arg name=\"value\" direction=\"out\" type=\"b\" />\n"
 			"    </method>\n"
@@ -487,6 +493,12 @@ void listen() {
 		else if (dbus_message_is_method_call(msg, "org.trinitydesktop.hardwarecontrol.Power", "Standby")) {
 			reply_SetPower(msg, conn, "standby");
 		}
+		else if (dbus_message_is_method_call(msg, "org.trinitydesktop.hardwarecontrol.Power", "CanFreeze")) {
+			reply_CanSetPower(msg, conn, "freeze");
+		}
+		else if (dbus_message_is_method_call(msg, "org.trinitydesktop.hardwarecontrol.Power", "Freeze")) {
+			reply_SetPower(msg, conn, "freeze");
+		}
 		else if (dbus_message_is_method_call(msg, "org.trinitydesktop.hardwarecontrol.Power", "CanSuspend")) {
 			reply_CanSetPower(msg, conn, "mem");
 		}

tdecore/tdehw/tderootsystemdevice.cpp

@@ -147,6 +147,45 @@ bool TDERootSystemDevice::canStandby() {
 	return FALSE;
 }
 
+bool TDERootSystemDevice::canFreeze() {
+	// Network file systems mounted on $HOME typically cause nasty suspend/resume failures
+	// See Bug 1615 for details
+	if (isNetworkFileSystem(TDEStorageDevice::determineFileSystemType(TDEGlobal::dirs()->localtdedir()))) {
+		return FALSE;
+	}
+
+	TQString statenode = "/sys/power/state";
+	int rval = access (statenode.ascii(), W_OK);
+	if (rval == 0) {
+		if (powerStates().contains(TDESystemPowerState::Freeze)) {
+			return TRUE;
+		}
+		else {
+			return FALSE;
+		}
+	}
+
+#ifdef WITH_TDEHWLIB_DAEMONS
+	{
+		TQT_DBusConnection dbusConn = TQT_DBusConnection::addConnection(TQT_DBusConnection::SystemBus);
+		if (dbusConn.isConnected()) {
+			// can freeze?
+			TQT_DBusMessage msg = TQT_DBusMessage::methodCall(
+						"org.trinitydesktop.hardwarecontrol",
+						"/org/trinitydesktop/hardwarecontrol",
+						"org.trinitydesktop.hardwarecontrol.Power",
+						"CanFreeze");
+			TQT_DBusMessage reply = dbusConn.sendWithReply(msg);
+			if (reply.type() == TQT_DBusMessage::ReplyMessage && reply.count() == 1) {
+				return reply[0].toBool();
+			}
+		}
+	}
+#endif // WITH_TDEHWLIB_DAEMONS
+
+	return FALSE;
+}
+
 bool TDERootSystemDevice::canSuspend() {
 	// Network file systems mounted on $HOME typically cause nasty suspend/resume failures
 	// See Bug 1615 for details
@@ -460,7 +499,7 @@ void TDERootSystemDevice::setHibernationMethod(TDESystemHibernationMethod::TDESy
 }
 
 bool TDERootSystemDevice::setPowerState(TDESystemPowerState::TDESystemPowerState ps) {
-	if ((ps == TDESystemPowerState::Standby) || (ps == TDESystemPowerState::Suspend) || (ps == TDESystemPowerState::Hibernate)) {
+	if ((ps == TDESystemPowerState::Standby) || (ps == TDESystemPowerState::Freeze) || (ps == TDESystemPowerState::Suspend) || (ps == TDESystemPowerState::Hibernate)) {
 		TQString statenode = "/sys/power/state";
 		TQFile file( statenode );
 		if ( file.open( IO_WriteOnly ) ) {
@@ -468,6 +507,9 @@ bool TDERootSystemDevice::setPowerState(TDESystemPowerState::TDESystemPowerState
 			if (ps == TDESystemPowerState::Standby) {
 				powerCommand = "standby";
 			}
+			if (ps == TDESystemPowerState::Freeze) {
+				powerCommand = "freeze";
+			}
 			if (ps == TDESystemPowerState::Suspend) {
 				powerCommand = "mem";
 			}
@@ -591,6 +633,17 @@ bool TDERootSystemDevice::setPowerState(TDESystemPowerState::TDESystemPowerState
 						return true;
 					}
 				}
+				else if (ps == TDESystemPowerState::Freeze) {
+					TQT_DBusMessage msg = TQT_DBusMessage::methodCall(
+								"org.trinitydesktop.hardwarecontrol",
+								"/org/trinitydesktop/hardwarecontrol",
+								"org.trinitydesktop.hardwarecontrol.Power",
+								"Freeze");
+					TQT_DBusMessage reply = dbusConn.sendWithReply(msg);
+					if (reply.type() == TQT_DBusMessage::ReplyMessage) {
+						return true;
+					}
+				}
 				else if (ps == TDESystemPowerState::Suspend) {
 					TQT_DBusMessage msg = TQT_DBusMessage::methodCall(
 								"org.trinitydesktop.hardwarecontrol",

tdecore/tdehw/tderootsystemdevice.h

@@ -37,6 +37,7 @@ namespace TDESystemPowerState {
 enum TDESystemPowerState {
 	Active,
 	Standby,
+	Freeze,
 	Suspend,
 	Hibernate,
 	PowerOff,
@@ -107,6 +108,11 @@ class TDECORE_EXPORT TDERootSystemDevice : public TDEGenericDevice
 		*/
 		bool canStandby();
 
+		/**
+		* @return TRUE if hardware and permissions allow the system to enter freeze state, FALSE if not
+		*/
+		bool canFreeze();
+
 		/**
 		* @return TRUE if hardware and permissions allow the system to be suspended, FALSE if not
 		*/