lily/priority-halign-engraver.cc

   1 /*
   2   score-halign-reg.cc -- implement Priority_horizontal_align_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "bar.hh"
  10 #include "break-align-item.hh"
  11 #include "priority-halign-engraver.hh"
  12 #include "score-priority-engraver.hh"
  13
  14 Priority_horizontal_align_engraver::Priority_horizontal_align_engraver()
  15 {
  16   halign_p_ =0;
  17 }
  18
  19 void
  20 Priority_horizontal_align_engraver::do_pre_move_processing()
  21 {
  22   if (halign_p_)
  23     {
  24       typeset_element (halign_p_);
  25       halign_p_ =0;
  26     }
  27 }
  28
  29 void
  30 Priority_horizontal_align_engraver::acknowledge_element (Score_element_info i)
  31 {
  32   Engraver* reg = i.origin_grav_l_arr_[0];
  33   if (reg->is_type_b (Score_priority_engraver::static_name()))
  34     {
  35       if (!halign_p_)
  36         {
  37           halign_p_ = new Break_align_item;
  38           halign_p_->breakable_b_ = true;
  39           announce_element (Score_element_info (halign_p_,0));
  40         }
  41       Item * it = i.elem_l_->access_Item ();
  42       if (it->break_priority_i_ == 0)
  43         halign_p_->center_l_ = it;
  44
  45       halign_p_->add_item (it, it->break_priority_i_);
  46     }
  47 }
  48
  49 IMPLEMENT_IS_TYPE_B1(Priority_horizontal_align_engraver,Engraver);
  50 ADD_THIS_TRANSLATOR(Priority_horizontal_align_engraver);