lily/span-bar-grav.cc

   1 /*
   2   span-bar-grav.cc -- implement Span_bar_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "span-bar.hh"
  10 #include "span-bar-grav.hh"
  11 #include "vertical-align-spanner.hh"
  12
  13 Span_bar_engraver::Span_bar_engraver()
  14 {
  15   spanbar_p_ =0;
  16   valign_l_ =0;
  17 }
  18
  19 Span_bar*
  20 Span_bar_engraver::get_span_bar_p() const
  21 {
  22   return new Span_bar;
  23 }
  24
  25
  26 void
  27 Span_bar_engraver::do_creation_processing ()
  28 {
  29 }
  30
  31 void
  32 Span_bar_engraver::do_removal_processing ()
  33 {
  34 }
  35
  36 void
  37 Span_bar_engraver::acknowledge_element (Score_elem_info i)
  38 {
  39   int depth = i.origin_grav_l_arr_.size();
  40   if (depth > 1
  41       && i.elem_l_->is_type_b (Bar::static_name()))
  42     {
  43       bar_l_arr_.push ((Bar*)i.elem_l_->item());
  44
  45       if (bar_l_arr_.size() >= 2 && !spanbar_p_)
  46         {
  47           spanbar_p_ = get_span_bar_p();
  48           announce_element (Score_elem_info (spanbar_p_,0));
  49           spanbar_p_-> type_str_ = bar_l_arr_[0]->type_str_;
  50         }
  51     }
  52   else if  (i.elem_l_->is_type_b (Vertical_align_spanner::static_name())
  53             && i.origin_grav_l_arr_.size() <= 2)
  54     {
  55       valign_l_ = (Vertical_align_spanner*)i.elem_l_->spanner();
  56     }
  57 }
  58
  59 void
  60 Span_bar_engraver::do_pre_move_processing()
  61 {
  62   if (spanbar_p_)
  63     {
  64       for (int i=0; i < bar_l_arr_.size() ; i++)
  65         spanbar_p_->add (bar_l_arr_[i]);
  66       spanbar_p_->set (valign_l_);
  67       typeset_element (spanbar_p_);
  68       spanbar_p_ =0;
  69     }
  70   bar_l_arr_.set_size (0);
  71 }
  72
  73
  74 IMPLEMENT_IS_TYPE_B1(Span_bar_engraver,Engraver);
  75 ADD_THIS_TRANSLATOR(Span_bar_engraver);