1 files changed, 81 insertions, 0 deletions
diff --git a/src/Canvas.hpp b/src/Canvas.hpp
new file mode 100644
index 0000000..81e4d61
--- /dev/null
+++ b/src/Canvas.hpp
@@ -0,0 +1,81 @@
+// Copyright 2007-2021 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef PATCHAGE_CANVAS_HPP
+#define PATCHAGE_CANVAS_HPP
+
+#include "ActionSink.hpp"
+#include "ClientID.hpp"
+#include "PortID.hpp"
+#include "warnings.hpp"
+
+PATCHAGE_DISABLE_GANV_WARNINGS
+#include "ganv/Canvas.hpp"
+#include "ganv/types.h"
+PATCHAGE_RESTORE_WARNINGS
+
+#include <gdk/gdk.h>
+
+#include <map>
+
+namespace Ganv {
+class Node;
+} // namespace Ganv
+
+namespace patchage {
+
+enum class SignalDirection;
+
+struct PortInfo;
+
+class CanvasModule;
+class CanvasPort;
+class ILog;
+class Metadata;
+class Configuration;
+
+class Canvas : public Ganv::Canvas
+{
+public:
+  Canvas(ILog& log, ActionSink& action_sink, int width, int height);
+
+  CanvasPort* create_port(Configuration&  conf,
+                          const Metadata& metadata,
+                          const PortID&   id,
+                          const PortInfo& info);
+
+  CanvasModule* find_module(const ClientID& id, SignalDirection type);
+  CanvasPort*   find_port(const PortID& id);
+
+  void remove_module(const ClientID& id);
+
+  void remove_ports(bool (*pred)(const CanvasPort*));
+
+  void add_module(const ClientID& id, CanvasModule* module);
+
+  bool make_connection(Ganv::Node* tail, Ganv::Node* head);
+
+  void remove_port(const PortID& id);
+
+  void clear() override;
+
+private:
+  using PortIndex   = std::map<const PortID, CanvasPort*>;
+  using ModuleIndex = std::multimap<const ClientID, CanvasModule*>;
+
+  friend void disconnect_edge(GanvEdge*, void*);
+
+  bool on_event(GdkEvent* ev);
+
+  void on_connect(Ganv::Node* port1, Ganv::Node* port2);
+  void on_disconnect(Ganv::Node* port1, Ganv::Node* port2);
+
+  ILog&       _log;
+  ActionSink& _action_sink;
+  PortIndex   _port_index;
+  ModuleIndex _module_index;
+};
+
+} // namespace patchage
+
+#endif // PATCHAGE_CANVAS_HPP