lily/separating-line-group-engraver.cc

   1 /*
   2   separating-line-group-grav.cc --  implement Separating_line_group_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "separating-line-group-engraver.hh"
  11 #include "separating-group-spanner.hh"
  12 #include "single-malt-grouping-item.hh"
  13 #include "paper-column.hh"
  14 #include "paper-def.hh"
  15
  16 ADD_THIS_TRANSLATOR (Separating_line_group_engraver);
  17
  18 Separating_line_group_engraver::Separating_line_group_engraver ()
  19 {
  20   sep_span_p_ = 0;
  21   break_malt_p_ = 0;
  22   nobreak_malt_p_ =0;
  23 }
  24
  25 void
  26 Separating_line_group_engraver::do_creation_processing ()
  27 {
  28   sep_span_p_ = new Separating_group_spanner;
  29   announce_element (Score_element_info (sep_span_p_, 0));
  30   sep_span_p_->set_bounds (LEFT, get_staff_info ().command_pcol_l ());
  31 }
  32
  33 void
  34 Separating_line_group_engraver::do_removal_processing ()
  35 {
  36   sep_span_p_->set_bounds (RIGHT, get_staff_info ().command_pcol_l ());
  37   typeset_element (sep_span_p_);
  38   sep_span_p_ =0;
  39 }
  40
  41 void
  42 Separating_line_group_engraver::acknowledge_element (Score_element_info i)
  43 {
  44   Item * it = dynamic_cast <Item *> (i.elem_l_);
  45   if (it && !it->parent_l (X_AXIS))
  46     {
  47       bool ib =it->breakable_b ();
  48       Single_malt_grouping_item *&p_ref_ (ib ? break_malt_p_
  49                                           : nobreak_malt_p_);
  50
  51       if (!p_ref_)
  52         {
  53           p_ref_ = new Single_malt_grouping_item;
  54           if (ib)
  55             p_ref_->set_elt_property ("breakable", SCM_BOOL_T);
  56           announce_element (Score_element_info (p_ref_, 0));
  57         }
  58       p_ref_->add_item (it);
  59     }
  60 }
  61
  62 void
  63 Separating_line_group_engraver::do_pre_move_processing ()
  64 {
  65   if (break_malt_p_)
  66     {
  67       sep_span_p_->add_spacing_unit (break_malt_p_);
  68
  69       typeset_element (break_malt_p_);
  70       break_malt_p_ =0;
  71     }
  72   if (nobreak_malt_p_)
  73     {
  74       sep_span_p_->add_spacing_unit (nobreak_malt_p_);
  75       typeset_element (nobreak_malt_p_);
  76       nobreak_malt_p_ =0;
  77     }
  78 }
  79