lily/staff-walker.cc

   1 /*
   2   staff-walker.cc -- implement Staff_walker
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "proto.hh"
  10 #include "plist.hh"
  11 #include "grouping.hh"
  12 #include "staff.hh"
  13 #include "musical-request.hh"
  14 #include "staff-walker.hh"
  15 #include "staff-column.hh"
  16 #include "score-column.hh"
  17 #include "debug.hh"
  18 #include "time-description.hh"
  19 #include "command-request.hh"
  20 #include "grouping.hh"
  21 #include "score-walker.hh"
  22
  23 Staff_walker::~Staff_walker()
  24 {
  25     do_pre_move();
  26 }
  27
  28 Staff_walker::Staff_walker(Staff_walker const &s)
  29     :PCursor<Staff_column*> (s)
  30 {
  31     assert(false);
  32 }
  33
  34 Staff_walker::Staff_walker(Staff * s, PScore*ps )
  35     : PCursor<Staff_column*> (s->cols_)
  36 {
  37     staff_l_ = s;
  38     pscore_l_ = ps;
  39
  40     // should be in tdes. TODO
  41     default_grouping = new Rhythmic_grouping(MInterval(0, 1), 4);
  42     score_walk_l_ = 0;
  43 }
  44
  45 Moment
  46 Staff_walker::when() const
  47 {
  48     return ptr()->when();
  49 }
  50
  51 void
  52 Staff_walker::process_timing_reqs()
  53 {
  54     ptr()->update_time(time_, default_grouping);
  55 }
  56
  57 void
  58 Staff_walker::operator++(int i)
  59 {
  60     Moment last = when();
  61
  62     do_pre_move();
  63     PCursor<Staff_column*>::operator++(i);
  64     if (ok() ) {
  65         Moment delta_t = when() - last;
  66         assert(delta_t >Moment(0));
  67         time_.add( delta_t );
  68     }
  69     do_post_move();
  70 }
  71
  72 void
  73 Staff_walker::process()
  74 {
  75     process_timing_reqs();
  76     process_requests();
  77 }
  78
  79 void
  80 Staff_walker::allow_break()
  81 {
  82     score_walk_l_->allow_break(this);
  83 }
  84