lily/base-span-bar-engraver.cc

   1 /*
   2   span-bar-grav.cc -- implement Base_span_bar_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 "lily-guile.hh"
  10 #include "span-bar.hh"
  11 #include "base-span-bar-engraver.hh"
  12 #include "vertical-align-spanner.hh"
  13
  14 Base_span_bar_engraver::Base_span_bar_engraver()
  15 {
  16   spanbar_p_ =0;
  17   valign_l_ =0;
  18   use_priority_b_ = true;
  19   break_priority_i_ = 0;
  20 }
  21
  22 Span_bar*
  23 Base_span_bar_engraver::get_span_bar_p() const
  24 {
  25   return new Span_bar;
  26 }
  27
  28
  29 void
  30 Base_span_bar_engraver::acknowledge_element (Score_element_info i)
  31 {
  32   int depth = i.origin_grav_l_arr_.size();
  33   if (depth > 1
  34       && dynamic_cast<Bar *> (i.elem_l_))
  35     {
  36       bar_l_arr_.push (dynamic_cast<Bar *> (i.elem_l_));
  37
  38       if (bar_l_arr_.size() >= 2 && !spanbar_p_)
  39         /*
  40           hmm, i do want a bracket with one staff some times, but not always
  41           if (bar_l_arr_.size() >= 1 && !spanbar_p_)
  42
  43           --jcn
  44         */
  45
  46         /*
  47
  48           use a property?  get_property ("singleStaffBracket", 0) ?
  49
  50           --hwn
  51          */
  52         {
  53           spanbar_p_ = get_span_bar_p();
  54           String visnam =  String(name()) + "_visibility";
  55
  56           spanbar_p_->set_elt_property (ly_symbol ("visibility_lambda"),
  57                                         gh_eval_str (visnam.ch_C()));
  58
  59           if (use_priority_b_)
  60             {
  61               spanbar_p_->break_priority_i_ = break_priority_i_;
  62             }
  63           else
  64             {
  65               spanbar_p_->dim_cache_[X_AXIS].parent_l_ = &bar_l_arr_[0]->dim_cache_[X_AXIS];
  66             }
  67
  68           announce_element (Score_element_info (spanbar_p_,0));
  69           if (spanbar_p_->type_str_.empty_b ())
  70             spanbar_p_-> type_str_ = bar_l_arr_[0]->type_str_;
  71         }
  72     }
  73   else if  (dynamic_cast<Vertical_align_spanner *> (i.elem_l_)
  74             && i.origin_grav_l_arr_.size() <= 2)
  75     {
  76       valign_l_ = dynamic_cast<Vertical_align_spanner *> (i.elem_l_);
  77     }
  78 }
  79
  80 void
  81 Base_span_bar_engraver::do_pre_move_processing()
  82 {
  83   if (spanbar_p_)
  84     {
  85       for (int i=0; i < bar_l_arr_.size() ; i++)
  86         spanbar_p_->add_bar (bar_l_arr_[i]);
  87       spanbar_p_->set_align (valign_l_);
  88       typeset_element (spanbar_p_);
  89       spanbar_p_ =0;
  90     }
  91   bar_l_arr_.set_size (0);
  92 }
  93
  94
  95
  96 ADD_THIS_TRANSLATOR(Base_span_bar_engraver);