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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 void
20 Span_bar_engraver::acknowledge_element(Score_elem_info i)
21 {
22     if ( i.elem_l_->is_type_b( Bar::static_name() ) ) {
23         bar_l_arr_.push( (Bar*)i.elem_l_->item() );
24         
25         if (bar_l_arr_.size() >= 2 && !spanbar_p_) {
26             spanbar_p_ = new Span_bar;
27             announce_element( Score_elem_info(spanbar_p_,0) );
28         }
29     } else if  (i.elem_l_->is_type_b( Vertical_align_spanner::static_name() ) 
30                 && i.origin_grav_l_arr_.size() <= 2) {
31         valign_l_ = (Vertical_align_spanner*)i.elem_l_->spanner();
32     }
33 }
34
35 void
36 Span_bar_engraver::do_pre_move_processing()
37 {
38     if (spanbar_p_) {
39         for (int i=0; i < bar_l_arr_.size() ; i++)
40             spanbar_p_->add(bar_l_arr_[i]);
41         spanbar_p_->set( valign_l_ );
42         typeset_breakable_item(spanbar_p_);
43         spanbar_p_ =0;
44     }
45     bar_l_arr_.set_size( 0);
46         
47 }
48
49 IMPLEMENT_STATIC_NAME(Span_bar_engraver);
50 IMPLEMENT_IS_TYPE_B1(Span_bar_engraver,Engraver);
51 ADD_THIS_ENGRAVER(Span_bar_engraver);