1 files changed, 85 insertions, 0 deletions
diff --git a/src/server/events/Undo.cpp b/src/server/events/Undo.cpp
new file mode 100644
index 00000000..0c307e85
--- /dev/null
+++ b/src/server/events/Undo.cpp
@@ -0,0 +1,85 @@
+/*
+  This file is part of Ingen.
+  Copyright 2016 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/AtomReader.hpp"
+
+#include "Engine.hpp"
+#include "EventWriter.hpp"
+#include "Undo.hpp"
+
+namespace ingen {
+namespace server {
+namespace events {
+
+Undo::Undo(Engine&            engine,
+           SPtr<Interface>    client,
+           SampleCount        timestamp,
+           const ingen::Undo& msg)
+	: Event(engine, client, msg.seq, timestamp)
+	, _is_redo(false)
+{}
+
+Undo::Undo(Engine&            engine,
+           SPtr<Interface>    client,
+           SampleCount        timestamp,
+           const ingen::Redo& msg)
+	: Event(engine, client, msg.seq, timestamp)
+	, _is_redo(true)
+{}
+
+bool
+Undo::pre_process(PreProcessContext& ctx)
+{
+	const UPtr<UndoStack>& stack = _is_redo ? _engine.redo_stack() : _engine.undo_stack();
+	const Event::Mode      mode  = _is_redo ? Event::Mode::REDO    : Event::Mode::UNDO;
+
+	if (stack->empty()) {
+		return Event::pre_process_done(Status::NOT_FOUND);
+	}
+
+	const Event::Mode orig_mode = _engine.event_writer()->get_event_mode();
+	_entry = stack->pop();
+	_engine.event_writer()->set_event_mode(mode);
+	if (_entry.events.size() > 1) {
+		_engine.interface()->bundle_begin();
+	}
+
+	for (const LV2_Atom* ev : _entry.events) {
+		_engine.atom_interface()->write(ev);
+	}
+
+	if (_entry.events.size() > 1) {
+		_engine.interface()->bundle_end();
+	}
+	_engine.event_writer()->set_event_mode(orig_mode);
+
+	return Event::pre_process_done(Status::SUCCESS);
+}
+
+void
+Undo::execute(RunContext& context)
+{
+}
+
+void
+Undo::post_process()
+{
+	respond();
+}
+
+} // namespace events
+} // namespace server
+} // namespace ingen