From addc63715db2a8c8084af1a05582882e5a50deeb Mon Sep 17 00:00:00 2001
From: Georg Zotti <Georg.Zotti@univie.ac.at>
Date: Mon, 17 Oct 2022 15:26:28 +0200
Subject: [PATCH] Implement abortSlew command in LX200

---
 .../src/Lx200/Lx200Connection.cpp                 | 15 +++++++++++++++
 .../src/Lx200/Lx200Connection.hpp                 |  2 ++
 .../src/Lx200/TelescopeClientDirectLx200.cpp      |  7 +++++++
 .../src/Lx200/TelescopeClientDirectLx200.hpp      |  1 +
 4 files changed, 25 insertions(+)

diff --git a/plugins/TelescopeControl/src/Lx200/Lx200Connection.cpp b/plugins/TelescopeControl/src/Lx200/Lx200Connection.cpp
index 846b9884054dd..ef29d28177740 100644
--- a/plugins/TelescopeControl/src/Lx200/Lx200Connection.cpp
+++ b/plugins/TelescopeControl/src/Lx200/Lx200Connection.cpp
@@ -350,3 +350,18 @@ void Lx200Connection::sendCommand(Lx200Command *command)
 	}
 }
 
+void Lx200Connection::sendAbort()
+{
+		#ifdef DEBUG4
+		*log_file << Now()
+			  << "Lx200Connection::sendAbort()"
+			  << StelUtils::getEndLineChar();
+		#endif
+		command_list.clear();
+		read_buff_end = read_buff;
+		write_buff_end = write_buff;
+		command_list.push_back(new Lx200CommandStopSlew(server));
+		flushCommandList();
+		//*log_file << Now() << "Lx200Connection::sendAbort() end"
+		//          << StelUtils::getEndLineChar();
+}
diff --git a/plugins/TelescopeControl/src/Lx200/Lx200Connection.hpp b/plugins/TelescopeControl/src/Lx200/Lx200Connection.hpp
index 5dc8a9711de06..837fe6e154438 100644
--- a/plugins/TelescopeControl/src/Lx200/Lx200Connection.hpp
+++ b/plugins/TelescopeControl/src/Lx200/Lx200Connection.hpp
@@ -39,6 +39,8 @@ class Lx200Connection : public SerialPort
 	void sendGoto(unsigned int ra_int, int dec_int);
 	void sendSync(unsigned int ra_int, int dec_int);
 	void sendCommand(Lx200Command * command);
+	//! Delete pending commands and send abort signal.
+	void sendAbort();
 	void setTimeBetweenCommands(long long int micro_seconds)
 	{
 		time_between_commands = micro_seconds;
diff --git a/plugins/TelescopeControl/src/Lx200/TelescopeClientDirectLx200.cpp b/plugins/TelescopeControl/src/Lx200/TelescopeClientDirectLx200.cpp
index 10d3f1ad1aa06..2d7b438d6bafe 100644
--- a/plugins/TelescopeControl/src/Lx200/TelescopeClientDirectLx200.cpp
+++ b/plugins/TelescopeControl/src/Lx200/TelescopeClientDirectLx200.cpp
@@ -151,6 +151,13 @@ void TelescopeClientDirectLx200::telescopeSync(const Vec3d &j2000Pos, StelObject
 	syncReceived(ra_int, dec_int);
 }
 
+void TelescopeClientDirectLx200::telescopeAbortSlew()
+{
+	if (!isConnected())
+		return;
+	lx200->sendAbort();
+}
+
 void TelescopeClientDirectLx200::gotoReceived(unsigned int ra_int, int dec_int)
 {
 	lx200->sendGoto(ra_int, dec_int);
diff --git a/plugins/TelescopeControl/src/Lx200/TelescopeClientDirectLx200.hpp b/plugins/TelescopeControl/src/Lx200/TelescopeClientDirectLx200.hpp
index 7963dad64e648..6909e04215e53 100644
--- a/plugins/TelescopeControl/src/Lx200/TelescopeClientDirectLx200.hpp
+++ b/plugins/TelescopeControl/src/Lx200/TelescopeClientDirectLx200.hpp
@@ -71,6 +71,7 @@ class TelescopeClientDirectLx200 : public TelescopeClient, public Server
 	void performCommunication() override;
 	void telescopeGoto(const Vec3d &j2000Pos, StelObjectP selectObject) override;
 	void telescopeSync(const Vec3d &j2000Pos, StelObjectP selectObject) override;
+	void telescopeAbortSlew() override;
 	bool isInitialized(void) const override;
 	
 	//======================================================================