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location.h

/*
    Copyright (C) 2000 Paul Davis 

    This program 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 2 of the License, or
    (at your option) any later version.

    This program 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 more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: location.h,v 1.17 2005/05/02 12:05:29 pauld Exp $
*/

#ifndef __ardour_location_h__
#define __ardour_location_h__

#include <string>
#include <list>
#include <iostream>
#include <map>

#include <sys/types.h>
#include <pthread.h>
#include <sigc++/signal_system.h>

#include <pbd/lockmonitor.h>
#include <pbd/undo.h>

#include "ardour.h"
#include "stateful.h"
#include "state_manager.h"

using std::string;

namespace ARDOUR {

class Location : public Stateful, public SigC::Object
{
  public:
      enum Flags {
            IsMark = 0x1,
            IsAutoPunch = 0x2,
            IsAutoLoop = 0x4,
            IsHidden = 0x8,
            IsCDMarker = 0x10,
            IsEnd = 0x20
      };

      Location (jack_nframes_t sample_start,
              jack_nframes_t sample_end,
              const string &name,
              Flags bits = Flags(0))            
            
            : _name (name),
            _start (sample_start),
            _end (sample_end),
            _flags (bits) { }
      
      Location () {
            _start = 0;
            _end = 0;
            _flags = 0; 
      }

      Location (const Location& other);
      Location* operator= (const Location& other);

      jack_nframes_t start() { return _start; }
      jack_nframes_t end() { return _end; }
      jack_nframes_t length() { return _end - _start; }

      int set_start (jack_nframes_t s);
      int set_end (jack_nframes_t e);
      int set (jack_nframes_t start, jack_nframes_t end);

      const string& name() { return _name; }
      void set_name (const string &str) { _name = str; name_changed(this); }

      void set_auto_punch (bool yn, void *src);
      void set_auto_loop (bool yn, void *src);
      void set_hidden (bool yn, void *src);
      void set_cd (bool yn, void *src);
      void set_is_end (bool yn, void* src);

      bool is_auto_punch ()  { return _flags & IsAutoPunch; }
      bool is_auto_loop () { return _flags & IsAutoLoop; }
      bool is_mark () { return _flags & IsMark; }
      bool is_hidden () { return _flags & IsHidden; }
      bool is_cd_marker () { return _flags & IsCDMarker; }
      bool is_end() { return _flags & IsEnd; }

      SigC::Signal1<void,Location*> name_changed;
      SigC::Signal1<void,Location*> end_changed;
      SigC::Signal1<void,Location*> start_changed;

      SigC::Signal2<void,Location*,void*> FlagsChanged;

      /* this is sent only when both start&end change at the same time */

      SigC::Signal1<void,Location*> changed;
   
      /* CD Track / CD-Text info */

      std::map<string, string> cd_info;
      XMLNode& cd_info_node (const string &, const string &);

      XMLNode& get_state (void);
      int set_state (const XMLNode&);

  private:
      string        _name;
      jack_nframes_t     _start;
      jack_nframes_t     _end;
      uint32_t _flags;

      void set_mark (bool yn);
      bool set_flag_internal (bool yn, Flags flag);
};

class Locations : public Stateful, public StateManager
{
  public:
      typedef std::list<Location *> LocationList;

      Locations ();
      ~Locations ();

      void add (Location *, bool make_current = false);
      void remove (Location *);
      void clear ();
      void clear_markers ();
      void clear_ranges ();

      XMLNode& get_state (void);
      int set_state (const XMLNode&);

      Location* auto_loop_location () const;
      Location* auto_punch_location () const;
      Location* end_location() const;

      int set_current (Location *, bool want_lock = true);
      Location *current () const { return current_location; }

      Location *first_location_before (jack_nframes_t);
      Location *first_location_after (jack_nframes_t);

      SigC::Signal1<void,Location*> current_changed;
      SigC::Signal0<void>           changed;
      SigC::Signal1<void,Location*> added;
      SigC::Signal1<void,Location*> removed;

      template<class T> void apply (T& obj, void (T::*method)(LocationList&)) {
            LockMonitor lm (lock, __LINE__, __FILE__);
            (obj.*method)(locations);
      }

      template<class T1, class T2> void apply (T1& obj, void (T1::*method)(LocationList&, T2& arg), T2& arg) {
            LockMonitor lm (lock, __LINE__, __FILE__);
            (obj.*method)(locations, arg);
      }

      UndoAction get_memento () const;

  private:

      struct State : public ARDOUR::StateManager::State {
          LocationList locations;
          LocationList states;

          State (std::string why) : ARDOUR::StateManager::State (why) {}
      };

      LocationList       locations;
      Location          *current_location;
      PBD::Lock          lock;

      int set_current_unlocked (Location *);
      void location_changed (Location*);

      Change   restore_state (StateManager::State&);
      StateManager::State* state_factory (std::string why) const;
};

}; /* namespace ARDOUR */

#endif /* __ardour_location_h__ */

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