/* This file is part of Patchage.
 * Copyright 2007-2020 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_CANVAS_HPP
#define PATCHAGE_CANVAS_HPP

#include "ClientID.hpp"
#include "PortID.hpp"
#include "SignalDirection.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 {

struct PortInfo;

class Patchage;
class CanvasModule;
class CanvasPort;
class Connector;

class Canvas : public Ganv::Canvas
{
public:
  Canvas(Connector& connector, int width, int height);

  CanvasPort* create_port(Patchage&       patchage,
                          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_module(CanvasModule* module);

  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);

  Connector&  _connector;
  PortIndex   _port_index;
  ModuleIndex _module_index;
};

} // namespace patchage

#endif // PATCHAGE_CANVAS_HPP