source/libr2c2/trackchain.h

   1 #ifndef LIBR2C2_TRACKCHAIN_H_
   2 #define LIBR2C2_TRACKCHAIN_H_
   3
   4 #include <set>
   5 #include <stdexcept>
   6 #include <sigc++/trackable.h>
   7 #include <msp/datafile/statement.h>
   8 #include "trackiter.h"
   9
  10 namespace R2C2 {
  11
  12 class Layout;
  13 class Object;
  14
  15 class bad_chain: public std::logic_error
  16 {
  17 public:
  18         bad_chain(const std::string &w): std::logic_error(w) { }
  19         virtual ~bad_chain() throw() { }
  20 };
  21
  22
  23 class TrackChain: public sigc::trackable
  24 {
  25 public:
  26         enum Direction
  27         {
  28                 UNSPECIFIED,
  29                 UP,
  30                 DOWN
  31         };
  32
  33         typedef std::set<Track *> TrackSet;
  34
  35 protected:
  36         enum Validity
  37         {
  38                 VALID,
  39                 UNLINKED,
  40                 BAD_PATH,
  41                 INCOMPATIBLE
  42         };
  43
  44 public:
  45         sigc::signal<void, const std::string &> signal_name_changed;
  46         sigc::signal<void, Track &> signal_track_added;
  47         sigc::signal<void, Track &> signal_track_removed;
  48
  49 protected:
  50         Layout &layout;
  51         std::string name;
  52         TrackSet tracks;
  53         TrackIter ends[2];
  54
  55         TrackChain(Layout &);
  56 public:
  57         virtual ~TrackChain() { }
  58
  59         virtual void set_name(const std::string &);
  60         const std::string &get_name() const { return name; }
  61
  62         void add_track(Track &);
  63         void add_tracks(const TrackSet &);
  64 protected:
  65         virtual void on_track_added(Track &) { }
  66         virtual Validity check_validity(Track &) const;
  67         static void throw_bad_chain(Validity);
  68 private:
  69         void update_ends(Track &);
  70 public:
  71         const TrackSet &get_tracks() const { return tracks; }
  72         bool has_track(Track &) const;
  73         virtual TrackIter iter_for(Track &, Direction) const;
  74         TrackIter get_end(unsigned) const;
  75         bool is_loop() const;
  76
  77 private:
  78         void object_removed(Object &);
  79
  80 public:
  81         virtual Msp::DataFile::Statement save_reference() const = 0;
  82 };
  83
  84
  85 void operator<<(Msp::LexicalConverter &, TrackChain::Direction);
  86 void operator>>(const Msp::LexicalConverter &, TrackChain::Direction &);
  87
  88 } // namespace R2C2
  89
  90 #endif