Server-side copy paste with LV2 state support.

git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@5541 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 130 insertions, 0 deletions

diff --git a/src/server/events/Copy.cpp b/src/server/events/Copy.cpp
new file mode 100644
index 00000000..67ab4747
--- /dev/null
+++ b/src/server/events/Copy.cpp
@@ -0,0 +1,130 @@
+/*
+  This file is part of Ingen.
+  Copyright 2007-2015 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or any later version.
+
+  Ingen 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 Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ingen/Store.hpp"
+#include "raul/Path.hpp"
+
+#include "BlockImpl.hpp"
+#include "Broadcaster.hpp"
+#include "Driver.hpp"
+#include "Engine.hpp"
+#include "EnginePort.hpp"
+#include "GraphImpl.hpp"
+#include "events/Copy.hpp"
+
+namespace Ingen {
+namespace Server {
+namespace Events {
+
+Copy::Copy(Engine&           engine,
+           SPtr<Interface>   client,
+           int32_t           id,
+           SampleCount       timestamp,
+           const Raul::Path& old_path,
+           const Raul::URI&  new_uri)
+	: Event(engine, client, id, timestamp)
+	, _old_path(old_path)
+	, _new_uri(new_uri)
+	, _parent(NULL)
+	, _block(NULL)
+	, _compiled_graph(NULL)
+{}
+
+bool
+Copy::pre_process()
+{
+	if (_old_path.empty() ||
+	    !Node::uri_is_path(_new_uri) ||
+	    _new_uri == Node::root_uri()) {
+		return Event::pre_process_done(Status::BAD_REQUEST);
+	}
+
+	// Only support a single source for now
+	const Raul::Path new_path = Node::uri_to_path(_new_uri);
+	if (!Raul::Symbol::is_valid(new_path.symbol())) {
+		return Event::pre_process_done(Status::BAD_REQUEST);
+	}
+
+	std::unique_lock<std::mutex> lock(_engine.store()->mutex());
+
+	// Find the old node
+	const Store::iterator i = _engine.store()->find(_old_path);
+	if (i == _engine.store()->end()) {
+		return Event::pre_process_done(Status::NOT_FOUND, _old_path);
+	}
+
+	// Ensure the new node doesn't already exists
+	if (_engine.store()->find(new_path) != _engine.store()->end()) {
+		return Event::pre_process_done(Status::EXISTS, new_path);
+	}
+
+	// Get old node block, or fail (ports not supported for now)
+	BlockImpl* old_block = dynamic_cast<BlockImpl*>(i->second.get());
+	if (!old_block) {
+		return Event::pre_process_done(Status::BAD_OBJECT_TYPE, _old_path);
+	}
+
+	// Find new parent graph
+	const Raul::Path      parent_path = new_path.parent();
+	const Store::iterator p           = _engine.store()->find(parent_path);
+	if (p == _engine.store()->end()) {
+		return Event::pre_process_done(Status::NOT_FOUND, parent_path);
+	}
+	if (!(_parent = dynamic_cast<GraphImpl*>(p->second.get()))) {
+		return Event::pre_process_done(Status::BAD_OBJECT_TYPE, parent_path);
+	}
+
+	// Create new block
+	if (!(_block = dynamic_cast<BlockImpl*>(
+		      old_block->duplicate(_engine, Raul::Symbol(new_path.symbol()), _parent)))) {
+		return Event::pre_process_done(Status::INTERNAL_ERROR);
+	}
+
+	_block->activate(*_engine.buffer_factory());
+
+	// Add block to the store and the graph's pre-processor only block list
+	_parent->add_block(*_block);
+	_engine.store()->add(_block);
+
+	// Compile graph with new block added for insertion in audio thread
+	if (_parent->enabled()) {
+		_compiled_graph = _parent->compile();
+	}
+	
+	return Event::pre_process_done(Status::SUCCESS);
+}
+
+void
+Copy::execute(ProcessContext& context)
+{
+	if (_block) {
+		_parent->set_compiled_graph(_compiled_graph);
+		_compiled_graph = NULL;  // Graph takes ownership
+	}
+}
+
+void
+Copy::post_process()
+{
+	Broadcaster::Transfer t(*_engine.broadcaster());
+	if (respond() == Status::SUCCESS) {
+		_engine.broadcaster()->copy(_old_path, _new_uri);
+	}
+}
+
+} // namespace Events
+} // namespace Server
+} // namespace Ingen