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-rw-r--r--src/server/events/Undo.cpp85
1 files changed, 85 insertions, 0 deletions
diff --git a/src/server/events/Undo.cpp b/src/server/events/Undo.cpp
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+++ b/src/server/events/Undo.cpp
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+/*
+ 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