Add formspec theming using prepended strings

src/network/clientopcodes.cpp

@@ -121,6 +121,7 @@ const ToClientCommandHandler toClientCommandTable[TOCLIENT_NUM_MSG_TYPES] =
 	null_command_handler,
 	null_command_handler,
 	{ "TOCLIENT_SRP_BYTES_S_B",            TOCLIENT_STATE_NOT_CONNECTED, &Client::handleCommand_SrpBytesSandB }, // 0x60
+	{ "TOCLIENT_FORMSPEC_PREPEND",         TOCLIENT_STATE_CONNECTED, &Client::handleCommand_FormspecPrepend }, // 0x61,
 };
 
 const static ServerCommandFactory null_command_factory = { "TOSERVER_NULL", 0, false };

src/network/clientpackethandler.cpp

@@ -1324,6 +1324,15 @@ void Client::handleCommand_SrpBytesSandB(NetworkPacket* pkt)
 	Send(&resp_pkt);
 }
 
+void Client::handleCommand_FormspecPrepend(NetworkPacket *pkt)
+{
+	LocalPlayer *player = m_env.getLocalPlayer();
+	assert(player != NULL);
+
+	// Store formspec in LocalPlayer
+	*pkt >> player->formspec_prepend;
+}
+
 void Client::handleCommand_CSMFlavourLimits(NetworkPacket *pkt)
 {
 	*pkt >> m_csm_flavour_limits >> m_csm_noderange_limit;

src/network/networkprotocol.h

@@ -187,6 +187,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 			'zoom_fov'.
 		Nodebox version 5
 		Add disconnected nodeboxes
+		Add TOCLIENT_FORMSPEC_PREPEND
 */
 
 #define LATEST_PROTOCOL_VERSION 36
@@ -644,7 +645,13 @@ enum ToClientCommand
 		std::string bytes_B
 	*/
 
-	TOCLIENT_NUM_MSG_TYPES = 0x61,
+	TOCLIENT_FORMSPEC_PREPEND = 0x61,
+	/*
+		u16 len
+		u8[len] formspec
+	*/
+
+	TOCLIENT_NUM_MSG_TYPES = 0x62,
 };
 
 enum ToServerCommand
@@ -930,4 +937,3 @@ enum CSMFlavourLimit : u64 {
 	CSM_FL_LOOKUP_NODES = 0x00000010, // Limit node lookups
 	CSM_FL_ALL = 0xFFFFFFFF,
 };
-

src/network/serveropcodes.cpp

@@ -210,4 +210,5 @@ const ClientCommandFactory clientCommandFactoryTable[TOCLIENT_NUM_MSG_TYPES] =
 	null_command_factory,
 	null_command_factory,
 	{ "TOSERVER_SRP_BYTES_S_B",            0, true }, // 0x60
+	{ "TOCLIENT_FORMSPEC_PREPEND",         0, true }, // 0x61
 };