lily/bar-grav.cc

   1 /*
   2   bar-reg.cc -- implement Bar_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1998 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "bar-grav.hh"
  10 #include "bar.hh"
  11 #include "musical-request.hh"
  12 #include "multi-measure-rest.hh"
  13 #include "command-request.hh"
  14 #include "time-description.hh"
  15 #include "engraver-group.hh"
  16
  17 Bar_engraver::Bar_engraver()
  18 {
  19   bar_p_ =0;
  20   do_post_move_processing();
  21 }
  22
  23 bool
  24 Bar_engraver::do_try_request (Request*r_l)
  25 {
  26   Command_req* c_l = r_l->command();
  27   if (!c_l|| !c_l->bar())
  28     return false;
  29   Bar_req  * b= c_l->bar();
  30   if (bar_req_l_ && bar_req_l_->equal_b (b))
  31     return false;
  32
  33   bar_req_l_ = b;
  34
  35   return true;
  36 }
  37
  38 void
  39 Bar_engraver::create_bar ()
  40 {
  41   if (!bar_p_)
  42     {
  43       bar_p_ = new Bar;
  44       bar_p_->break_priority_i_  = 0;
  45       announce_element (Score_elem_info (bar_p_, bar_req_l_));
  46     }
  47 }
  48
  49
  50 void
  51 Bar_engraver::do_creation_processing ()
  52 {
  53   create_bar ();
  54   bar_p_->type_str_ = "";
  55 }
  56
  57 void
  58 Bar_engraver::do_removal_processing ()
  59 {
  60   if (bar_p_)
  61     {
  62       typeset_element (bar_p_);
  63       bar_p_ =0;
  64     }
  65 }
  66
  67 void
  68 Bar_engraver::do_process_requests()
  69 {
  70   if (bar_req_l_)
  71     {
  72       if (!bar_p_)
  73         create_bar ();
  74
  75       bar_p_->type_str_ = bar_req_l_->type_str_;
  76     }
  77   else
  78     {
  79       Time_description const *time = get_staff_info().time_C_;
  80       if (time && !time->whole_in_measure_)
  81         create_bar ();
  82     }
  83
  84   if (!bar_p_)
  85     {
  86       Break_req r;
  87       r.penalty_i_ = Break_req::DISALLOW;
  88       daddy_grav_l ()->try_request (&r);
  89     }
  90 }
  91
  92
  93 void
  94 Bar_engraver::do_pre_move_processing()
  95 {
  96   if (bar_p_)
  97     {
  98       typeset_element (bar_p_);
  99       bar_p_ =0;
 100     }
 101 }
 102
 103 void
 104 Bar_engraver::do_post_move_processing()
 105 {
 106   bar_req_l_ = 0;
 107 }
 108
 109
 110 IMPLEMENT_IS_TYPE_B1(Bar_engraver,Engraver);
 111 ADD_THIS_TRANSLATOR(Bar_engraver);
 112
 113