lily/score-priority-engraver.cc

   1 /*
   2   score-align-reg.cc -- implement Score_priority_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "dimension-cache.hh"
  10 #include "axis-group-item.hh"
  11 #include "score-priority-engraver.hh"
  12 #include "item.hh"
  13 #include "dictionary-iter.hh"
  14 #include "break-align-item.hh"
  15
  16
  17 Score_priority_engraver::Score_priority_engraver()
  18 {
  19   halign_p_ = 0;
  20 }
  21
  22 void
  23 Score_priority_engraver::do_pre_move_processing()
  24 {
  25   for (int i=0; i < column_p_arr_.size ();i++)
  26     typeset_element (column_p_arr_[i]);
  27   column_p_arr_.clear ();
  28
  29   if (halign_p_)
  30     {
  31       typeset_element (halign_p_);
  32       halign_p_ =0;
  33     }
  34 }
  35
  36 /*
  37   TODO: move this logic into Break_align_item
  38  */
  39 void
  40 Score_priority_engraver::acknowledge_element (Score_element_info inf)
  41 {
  42   if (Item * item_l = dynamic_cast <Item *> (inf.elem_l_))
  43     {
  44       if (item_l->empty_b (X_AXIS) || item_l->parent_l (X_AXIS))
  45         return;
  46
  47       SCM bp=item_l->remove_elt_property ("breakable");
  48       bool breakable = (bp != SCM_UNDEFINED);
  49       if (!breakable)
  50         return ;
  51
  52
  53       if (!halign_p_)
  54         {
  55           halign_p_ = new Break_align_item;
  56           halign_p_->set_elt_property ("breakable", SCM_BOOL_T);
  57           announce_element (Score_element_info (halign_p_,0));
  58         }
  59
  60       halign_p_->add_breakable_item (item_l);
  61     }
  62 }
  63
  64 ADD_THIS_TRANSLATOR(Score_priority_engraver);
  65