1 files changed, 295 insertions, 0 deletions
diff --git a/src/engine/DisconnectionEvent.cpp b/src/engine/DisconnectionEvent.cpp
new file mode 100644
index 00000000..e7d06eab
--- /dev/null
+++ b/src/engine/DisconnectionEvent.cpp
@@ -0,0 +1,295 @@
+/* This file is part of Om.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Om is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ * 
+ * Om is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "DisconnectionEvent.h"
+#include <string>
+#include "Responder.h"
+#include "Om.h"
+#include "OmApp.h"
+#include "ConnectionBase.h"
+#include "InputPort.h"
+#include "OutputPort.h"
+#include "Patch.h"
+#include "ClientBroadcaster.h"
+#include "Port.h"
+#include "PortInfo.h"
+#include "Maid.h"
+#include "ObjectStore.h"
+#include "util/Path.h"
+
+using std::string;
+namespace Om {
+
+
+//// DisconnectionEvent ////
+
+
+DisconnectionEvent::DisconnectionEvent(CountedPtr<Responder> responder, const string& src_port_path, const string& dst_port_path)
+: QueuedEvent(responder),
+  m_src_port_path(src_port_path),
+  m_dst_port_path(dst_port_path),
+  m_patch(NULL),
+  m_src_port(NULL),
+  m_dst_port(NULL),
+  m_lookup(true),
+  m_typed_event(NULL),
+  m_error(NO_ERROR)
+{
+}
+
+
+DisconnectionEvent::DisconnectionEvent(CountedPtr<Responder> responder, Port* const src_port, Port* const dst_port)
+: QueuedEvent(responder),
+  m_src_port_path(src_port->path()),
+  m_dst_port_path(dst_port->path()),
+  m_patch(src_port->parent_node()->parent_patch()),
+  m_src_port(src_port),
+  m_dst_port(dst_port),
+  m_lookup(false),
+  m_typed_event(NULL),
+  m_error(NO_ERROR)
+{
+	assert(src_port->port_info()->is_output());
+	assert(dst_port->port_info()->is_input());
+	assert(src_port->port_info()->type() == dst_port->port_info()->type());
+	assert(src_port->parent_node()->parent_patch()
+			== dst_port->parent_node()->parent_patch());
+}
+
+DisconnectionEvent::~DisconnectionEvent()
+{
+	delete m_typed_event;
+}
+
+
+void
+DisconnectionEvent::pre_process()
+{
+	if (m_lookup) {
+		if (m_src_port_path.parent().parent() != m_dst_port_path.parent().parent()) {
+			m_error = PARENT_PATCH_DIFFERENT;
+			QueuedEvent::pre_process();
+			return;
+		}
+		
+		/*m_patch = om->object_store()->find_patch(m_src_port_path.parent().parent());
+	
+		if (m_patch == NULL) {
+			m_error = PORT_NOT_FOUND;
+			QueuedEvent::pre_process();
+			return;
+		}*/
+		
+		Port* port1 = om->object_store()->find_port(m_src_port_path);
+		Port* port2 = om->object_store()->find_port(m_dst_port_path);
+		
+		if (port1 == NULL || port2 == NULL) {
+			m_error = PORT_NOT_FOUND;
+			QueuedEvent::pre_process();
+			return;
+		}
+	
+		if (port1->port_info()->type() != port2->port_info()->type()) {
+			m_error = TYPE_MISMATCH;
+			QueuedEvent::pre_process();
+			return;
+		}
+		
+		if (port1->port_info()->is_output() && port2->port_info()->is_input()) {
+			m_src_port = port1;
+			m_dst_port = port2;
+		} else if (port2->port_info()->is_output() && port1->port_info()->is_input()) {
+			m_src_port = port2;
+			m_dst_port = port1;
+		} else {
+			m_error = TYPE_MISMATCH;
+			QueuedEvent::pre_process();
+			return;
+		}
+	}
+	
+	// Create the typed event to actually do the work
+	const PortType type = m_src_port->port_info()->type();
+	if (type == AUDIO || type == CONTROL) {
+		m_typed_event = new TypedDisconnectionEvent<sample>(m_responder,
+			(OutputPort<sample>*)m_src_port, (InputPort<sample>*)m_dst_port);
+	} else if (type == MIDI) {
+		m_typed_event = new TypedDisconnectionEvent<MidiMessage>(m_responder,
+			(OutputPort<MidiMessage>*)m_src_port, (InputPort<MidiMessage>*)m_dst_port);
+	} else {
+		m_error = TYPE_MISMATCH;
+		QueuedEvent::pre_process();
+		return;
+	}
+
+	m_typed_event->pre_process();
+	
+	QueuedEvent::pre_process();
+}
+
+
+void
+DisconnectionEvent::execute(samplecount offset)
+{
+	QueuedEvent::execute(offset);
+
+	if (m_error == NO_ERROR)
+		m_typed_event->execute(offset);
+}
+
+
+void
+DisconnectionEvent::post_process()
+{
+	if (m_error == NO_ERROR) {
+		m_typed_event->post_process();
+	} else {
+		// FIXME: better error messages
+		string msg = "Unable to make connection ";
+		msg.append(m_src_port_path + " -> " + m_dst_port_path);
+		m_responder->respond_error(msg);
+	}
+}
+
+
+
+//// TypedDisconnectionEvent ////
+
+
+template <typename T>
+TypedDisconnectionEvent<T>::TypedDisconnectionEvent(CountedPtr<Responder> responder, OutputPort<T>* src_port, InputPort<T>* dst_port)
+: QueuedEvent(responder),
+  m_src_port(src_port),
+  m_dst_port(dst_port),
+  m_patch(NULL),
+  m_process_order(NULL),
+  m_succeeded(true)
+{
+	assert(src_port != NULL);
+	assert(dst_port != NULL);
+}
+
+template <typename T>
+TypedDisconnectionEvent<T>::~TypedDisconnectionEvent()
+{
+	// FIXME: haaaack, prevent a double delete
+	// this class is unusable by anything other than DisconnectionEvent because of this
+	//m_responder = NULL;
+}
+
+
+template <typename T>
+void
+TypedDisconnectionEvent<T>::pre_process()
+{
+	if (!m_dst_port->is_connected_to(m_src_port)) {
+		m_succeeded = false;
+		QueuedEvent::pre_process();
+		return;
+	}
+	
+	Node* const src_node = m_src_port->parent_node();
+	Node* const dst_node = m_dst_port->parent_node();
+	
+	m_patch = src_node->parent_patch();
+
+	if (src_node == NULL || dst_node == NULL) {
+		m_succeeded = false;
+		QueuedEvent::pre_process();
+		return;
+	}
+	
+	if (src_node->parent() != m_patch || dst_node->parent() != m_patch) {
+		m_succeeded = false;
+		QueuedEvent::pre_process();
+		return;
+	}
+	
+	bool removed = false;
+	
+	for (List<Node*>::iterator i = dst_node->providers()->begin(); i != dst_node->providers()->end(); ++i)
+		if ((*i) == src_node) {
+			delete dst_node->providers()->remove(i);
+			removed = true;
+			break;
+		}
+	assert(removed);
+	removed = false;
+
+	for (List<Node*>::iterator i = src_node->dependants()->begin(); i != src_node->dependants()->end(); ++i)
+		if ((*i) == dst_node) {
+			delete src_node->dependants()->remove(i);
+			removed = true;
+			break;
+		}
+	assert(removed);
+	
+	if (m_patch->process())
+		m_process_order = m_patch->build_process_order();
+	
+	m_succeeded = true;
+	QueuedEvent::pre_process();	
+}
+
+
+template <typename T>
+void
+TypedDisconnectionEvent<T>::execute(samplecount offset)
+{
+	if (m_succeeded) {
+
+		ListNode<ConnectionBase<T>*>* const port_connection
+			= m_dst_port->remove_connection(m_src_port);
+		
+		if (port_connection != NULL) {
+			ListNode<Connection*>* const patch_connection
+				= m_patch->remove_connection(m_src_port, m_dst_port);
+	
+			assert((Connection*)port_connection->elem() == patch_connection->elem());
+			
+			// Clean up both the list node and the connection itself...
+			om->maid()->push(port_connection);
+			om->maid()->push(patch_connection);
+			om->maid()->push(port_connection->elem());
+	
+			if (m_patch->process_order() != NULL)
+				om->maid()->push(m_patch->process_order());
+			m_patch->process_order(m_process_order);
+		} else {
+			m_succeeded = false;  // Ports weren't connected
+		}
+	}
+	QueuedEvent::execute(offset);
+}
+
+
+template <typename T>
+void
+TypedDisconnectionEvent<T>::post_process()
+{
+	if (m_succeeded) {
+	
+		m_responder->respond_ok();
+	
+		om->client_broadcaster()->send_disconnection(m_src_port->path(), m_dst_port->path());
+	} else {
+		m_responder->respond_error("Unable to disconnect ports.");
+	}
+}
+
+
+} // namespace Om
+