Add Action representation to isolate behaviour from canvas objects

A step towards isolating the canvas and ultimately the entire UI away so it can
be replaced.

1 files changed, 76 insertions, 0 deletions

diff --git a/src/Action.hpp b/src/Action.hpp
new file mode 100644
index 0000000..f843a14
--- /dev/null
+++ b/src/Action.hpp
@@ -0,0 +1,76 @@
+/* This file is part of Patchage.
+ * Copyright 2007-2021 David Robillard <d@drobilla.net>
+ *
+ * Patchage 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 3 of the License, or (at your option)
+ * any later version.
+ *
+ * Patchage 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 Patchage.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PATCHAGE_ACTION_HPP
+#define PATCHAGE_ACTION_HPP
+
+#include "ClientID.hpp"
+#include "PortID.hpp"
+#include "SignalDirection.hpp"
+
+#include <boost/variant/variant.hpp>
+
+namespace patchage {
+namespace action {
+
+struct ConnectPorts {
+  PortID tail;
+  PortID head;
+};
+
+struct DisconnectClient {
+  ClientID        client;
+  SignalDirection direction;
+};
+
+struct DisconnectPort {
+  PortID port;
+};
+
+struct DisconnectPorts {
+  PortID tail;
+  PortID head;
+};
+
+struct MoveModule {
+  ClientID        client;
+  SignalDirection direction;
+  double          x;
+  double          y;
+};
+
+struct SplitModule {
+  ClientID client;
+};
+
+struct UnsplitModule {
+  ClientID client;
+};
+
+} // namespace action
+
+/// A high-level action from the user
+using Action = boost::variant<action::ConnectPorts,
+                              action::DisconnectClient,
+                              action::DisconnectPort,
+                              action::DisconnectPorts,
+                              action::MoveModule,
+                              action::SplitModule,
+                              action::UnsplitModule>;
+
+} // namespace patchage
+
+#endif // PATCHAGE_ACTION_HPP