6 files changed, 21 insertions, 23 deletions
diff --git a/src/engine/Engine.cpp b/src/engine/Engine.cpp
index 90aea9b..7807f87 100644
--- a/src/engine/Engine.cpp
+++ b/src/engine/Engine.cpp
@@ -97,15 +97,6 @@ Engine::load_machine_midi(const Glib::ustring& uri,
 }
 
 void
-Engine::import_machine(SPtr<Machine> machine)
-{
-	_driver->machine()->nodes().insert(machine->nodes().begin(),
-	                                   machine->nodes().end());
-	// FIXME: thread safe?
-	// FIXME: announce
-}
-
-void
 Engine::export_midi(const Glib::ustring& filename, Raul::TimeDuration dur)
 {
 	SPtr<Machine>            machine = _driver->machine();
diff --git a/src/engine/JackDriver.cpp b/src/engine/JackDriver.cpp
index 0276cc5..c56e83d 100644
--- a/src/engine/JackDriver.cpp
+++ b/src/engine/JackDriver.cpp
@@ -437,16 +437,7 @@ JackDriver::finish_record()
 	_play_state = PlayState::PLAYING;
 	SPtr<Machine> machine = _recorder->finish();
 	_recorder.reset();
-	for (const auto& m : machine->nodes()) {
-		if (m->is_initial()) {
-			for (const auto& e : m->edges()) {
-				e->set_tail(_machine->initial_node());
-				_machine->initial_node()->edges().insert(e);
-			}
-		} else {
-			_machine->nodes().insert(m);
-		}
-	}
+	_machine->merge(*machine.get());
 }
 
 int
diff --git a/src/engine/Machine.cpp b/src/engine/Machine.cpp
index a6abcff..b5cfb28 100644
--- a/src/engine/Machine.cpp
+++ b/src/engine/Machine.cpp
@@ -100,6 +100,21 @@ Machine::operator=(const Machine& copy)
 	return *this;
 }
 
+void
+Machine::merge(const Machine& machine)
+{
+	for (const auto& m : machine.nodes()) {
+		if (m->is_initial()) {
+			for (const auto& e : m->edges()) {
+				e->set_tail(_initial_node);
+				_initial_node->edges().insert(e);
+			}
+		} else {
+			_nodes.insert(m);
+		}
+	}
+}
+
 /** Always returns a node, unless there are none */
 SPtr<Node>
 Machine::random_node()
diff --git a/src/engine/MachineBuilder.cpp b/src/engine/MachineBuilder.cpp
index 0a515a4..ff2ee77 100644
--- a/src/engine/MachineBuilder.cpp
+++ b/src/engine/MachineBuilder.cpp
@@ -45,7 +45,6 @@ void
 MachineBuilder::reset()
 {
 	_time                  = TimeStamp(_machine->time().unit()); // = 0
-	_initial_node          = SPtr<Node>(new Node(_time, true)); // duration 0
 	_connect_node          = _initial_node;
 	_connect_node_end_time = _time; // = 0
 }
diff --git a/src/engine/machina/Engine.hpp b/src/engine/machina/Engine.hpp
index 7e0c9bc..39974f1 100644
--- a/src/engine/machina/Engine.hpp
+++ b/src/engine/machina/Engine.hpp
@@ -54,8 +54,6 @@ public:
 	                                double               q,
 	                                Raul::TimeDuration   dur);
 
-	void import_machine(SPtr<Machine> machine);
-
 	void export_midi(const Glib::ustring& filename,
 	                 Raul::TimeDuration   dur);
 
diff --git a/src/engine/machina/Machine.hpp b/src/engine/machina/Machine.hpp
index 8a98e4c..d4eccea 100644
--- a/src/engine/machina/Machine.hpp
+++ b/src/engine/machina/Machine.hpp
@@ -51,7 +51,11 @@ public:
 	 */
 	Machine(const Machine& copy);
 
-	Machine& operator=(const Machine& other);
+	/** Completely replace this machine's contents with a deep copy. */
+	Machine& operator=(const Machine& copy);
+
+	/** Merge another machine into this machine. */
+	void merge(const Machine& machine);
 
 	bool is_empty()    { return _nodes.empty(); }
 	bool is_finished() { return _is_finished; }