lily/spacing-engraver.cc

   1 /*
   2   spacing-engraver.cc --  implement Spacing_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "musical-request.hh"
  11 #include "score-column.hh"
  12 #include "spacing-engraver.hh"
  13 #include "spacing-spanner.hh"
  14
  15 inline int
  16 compare (Rhythmic_tuple const &a, Rhythmic_tuple const &b)
  17 {
  18   return Rhythmic_tuple::time_compare (a,b);
  19 }
  20
  21 int
  22 Rhythmic_tuple::time_compare (Rhythmic_tuple const &h1,
  23                               Rhythmic_tuple const &h2)
  24 {
  25
  26   return (h1.end_ - h2.end_ ).sign ();
  27 }
  28
  29 Spacing_engraver::Spacing_engraver()
  30 {
  31   spacing_p_ = 0;
  32 }
  33
  34 void
  35 Spacing_engraver::do_creation_processing ()
  36 {
  37   spacing_p_  =new Spacing_spanner;
  38   spacing_p_->set_bounds (LEFT, get_staff_info ().command_pcol_l ());
  39   announce_element (Score_element_info (spacing_p_, 0));
  40 }
  41
  42 void
  43 Spacing_engraver::do_removal_processing ()
  44 {
  45   Paper_column * p = get_staff_info ().command_pcol_l ();
  46
  47   spacing_p_->set_bounds (RIGHT, p);
  48   typeset_element (spacing_p_);
  49   spacing_p_ =0;
  50 }
  51
  52 void
  53 Spacing_engraver::acknowledge_element (Score_element_info i)
  54 {
  55   if (i.elem_l_->get_elt_property (grace_scm_sym) != SCM_BOOL_F)
  56     return;
  57
  58   if (i.elem_l_->get_elt_property (non_rhythmic_scm_sym) != SCM_BOOL_F)
  59     return;
  60
  61   if (Rhythmic_req * r = dynamic_cast<Rhythmic_req*>(i.req_l_))
  62     {
  63       Rhythmic_tuple t(i, now_mom () + r->length_mom ());
  64       now_durations_.push (t);
  65     }
  66 }
  67
  68 void
  69 Spacing_engraver::do_pre_move_processing ()
  70 {
  71   Moment shortest_playing;
  72   shortest_playing.set_infinite (1);
  73   for (int i=0; i < playing_durations_.size (); i++)
  74     {
  75       Moment m = (playing_durations_[i].info_.req_l_)->length_mom ();
  76       if (m)
  77         shortest_playing = shortest_playing <? m;
  78     }
  79
  80   Moment starter, inf;
  81   inf.set_infinite (1);
  82   starter=inf;
  83   for (int i=0; i < now_durations_.size (); i++)
  84     {
  85       Moment m = now_durations_[i].info_.req_l_->length_mom ();
  86       if (m)
  87         starter = starter <? m;
  88
  89       playing_durations_.insert (now_durations_[i]);
  90     }
  91   now_durations_.clear ();
  92
  93   shortest_playing = shortest_playing <? starter;
  94
  95   Score_column * sc
  96     = dynamic_cast<Score_column*> (get_staff_info ().musical_pcol_l ());
  97
  98   sc->shortest_playing_mom_ = shortest_playing;
  99   sc->shortest_starter_mom_ = starter;
 100 }
 101
 102 void
 103 Spacing_engraver::do_post_move_processing ()
 104 {
 105   Moment now = now_mom ();
 106   stopped_durations_.clear ();
 107   while (playing_durations_.size () && playing_durations_.front ().end_ < now)
 108     playing_durations_.delmin ();
 109   while (playing_durations_.size () && playing_durations_.front ().end_ == now)
 110     stopped_durations_.push (playing_durations_.get ());
 111 }
 112
 113 ADD_THIS_TRANSLATOR(Spacing_engraver);
 114