src/barreg.cc

   1 /*
   2   barreg.cc -- implement Bar_register
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "barreg.hh"
  10 #include "bar.hh"
  11 #include "commandrequest.hh"
  12 #include "complexwalker.hh"
  13 #include "scorecolumn.hh"
  14
  15
  16 Bar_register::Bar_register(Complex_walker*w)
  17     : Request_register(w)
  18 {
  19     do_post_move_process();
  20 }
  21
  22 bool
  23 Bar_register::try_request(Request*r_l)
  24 {
  25     if (!r_l->command()->bar())
  26         return false;
  27
  28     assert(!bar_req_l_);
  29     bar_req_l_ = r_l->command()->bar();
  30
  31     return true;
  32 }
  33
  34 void
  35 Bar_register::process_request()
  36 {
  37
  38     if (bar_req_l_ ) {
  39         bar_p_ = new Bar(bar_req_l_->type_str_);
  40     } else if (!walk_l_->time_.whole_in_measure_) {
  41         bar_p_ = new Bar("|");
  42     }
  43
  44     if (bar_p_){
  45         walk_l_->allow_break();
  46         announce_element(Staff_elem_info(bar_p_, bar_req_l_, this) );
  47     }
  48 }
  49
  50 void
  51 Bar_register::split_bar(Bar *& pre, Bar * no, Bar * &post)
  52 {
  53     String s= no->type;
  54     if (s == ":|:") {
  55         pre = new Bar(":|");
  56         post = new Bar("|:");
  57     }else if (s=="|:") {
  58         post = new Bar(s);
  59     } else {
  60         pre = new Bar(*no);
  61     }
  62 }
  63
  64 void
  65 Bar_register::do_pre_move_process()
  66 {
  67       if (bar_p_) {
  68           Bar * post_p =0;
  69           Bar * pre_p =0;
  70           split_bar(pre_p, bar_p_, post_p);
  71
  72           typeset_breakable_item(pre_p, bar_p_, post_p);
  73           bar_p_ =0;
  74       }
  75 }
  76
  77 void
  78 Bar_register::do_post_move_process()
  79 {
  80     bar_req_l_ = 0;
  81     bar_p_ =0;
  82 }