lily/score-walker.cc

   1 /*
   2   score-walker.cc -- implement Score_walker
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8 #include "proto.hh"
   9 #include "plist.hh"
  10 #include "debug.hh"
  11 #include "score-walker.hh"
  12 #include "score.hh"
  13 #include "staff-walker.hh"
  14 #include "staff.hh"
  15 #include "score-column.hh"
  16
  17 Score_walker::Score_walker(Score *s)
  18     :PCursor<Score_column *> (s->cols_)
  19 {
  20     score_l_ = s;
  21     for (iter_top(s->staffs_,i); i.ok(); i++) {
  22         Staff_walker* w_p=i->get_walker_p();
  23         w_p->score_walk_l_ =this;
  24         walker_p_arr_.push(w_p);
  25     }
  26
  27     if(ok()) {
  28         s->find_col(0, false)->set_breakable();
  29         s->find_col(s->last(), false)->set_breakable();
  30     }
  31     reinit();
  32     breaks_i_=0;
  33 }
  34
  35
  36 void
  37 Score_walker::reinit()
  38 {
  39     disallow_break_walk_l_arr = walker_p_arr_;
  40     disallow_break_count_ = disallow_break_walk_l_arr.size();
  41 }
  42
  43
  44 /** Advance the cursor, and all Staff_walkers contained in this. Reset
  45   runtime fields */
  46 void
  47 Score_walker::operator ++(int )
  48 {
  49     Moment last = ptr()->when();
  50
  51     PCursor<Score_column *>::operator++(0);
  52     if (ok() && ptr()->when() == last)
  53         PCursor<Score_column *>::operator++(0);
  54     reinit();
  55     bool last_b =  (!ok());     // urgh
  56     for (int i=0; i< walker_p_arr_.size(); i++) {
  57         if (walker_p_arr_[i]->ok() &&
  58             (last_b || walker_p_arr_[i]->when() < when())) {
  59
  60             walker_p_arr_[i]->operator++(0);
  61         }
  62     }
  63 }
  64
  65 /** Allow the command_column to be breakable for one staff. If all
  66   staffs allow, then allow a break here.  */
  67 void
  68 Score_walker::allow_break(Staff_walker*w)
  69 {
  70     for (int i=0; i < disallow_break_walk_l_arr.size(); i++) {
  71         if (w == disallow_break_walk_l_arr[i]) {
  72             disallow_break_count_ --;
  73             disallow_break_walk_l_arr[i] =0;
  74
  75             if (!disallow_break_count_) {
  76                 PCursor<Score_column*> col_cursor = *this;
  77                 if (ptr()->musical_b())
  78                     col_cursor --;
  79                 col_cursor->set_breakable();
  80             }
  81         }
  82     }
  83 }
  84
  85 bool
  86 Score_walker::break_allowed_b()
  87 {
  88     return !disallow_break_count_;
  89 }
  90
  91 Moment
  92 Score_walker::when()
  93 {
  94     return ptr()->when();
  95 }
  96
  97 void
  98 Score_walker::process()
  99 {
 100     for (int i=0; i < walker_p_arr_.size(); i++) {
 101         Staff_walker *w = walker_p_arr_[i];
 102         if ( w->ok() && w->when() == when() ) {
 103             walker_p_arr_[i]->process();
 104         }
 105     }
 106     if (break_allowed_b()){
 107         breaks_i_ ++;
 108         if (! (breaks_i_ % 8))
 109             *mlog << "[" <<breaks_i_<<"]"<<flush;
 110     }
 111 }
 112
 113 Score_walker::~Score_walker()
 114 {
 115     *mlog << "[" <<breaks_i_<<"]"<<flush;
 116     for (int i=0; i < walker_p_arr_.size(); i++)
 117         delete walker_p_arr_[i];
 118     assert( !score_l_->find_col(score_l_->last(), true)->used_b());
 119 }
 120
 121