lily/figured-bass-position-engraver.cc

   1 /*
   2   figured-bass-position-engraver.cc -- implement Figured_bass_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7
   8 */
   9
  10 #include "engraver.hh"
  11
  12 #include "context.hh"
  13 #include "spanner.hh"
  14 #include "side-position-interface.hh"
  15 #include "translator.icc"
  16 #include "axis-group-interface.hh"
  17
  18 class Figured_bass_position_engraver : public Engraver
  19 {
  20   TRANSLATOR_DECLARATIONS(Figured_bass_position_engraver);
  21
  22   Spanner *bass_figure_alignment_;
  23   Spanner *positioner_;
  24   vector<Grob*> support_;
  25   vector<Grob*> span_support_;
  26 protected:
  27   DECLARE_ACKNOWLEDGER (note_column);
  28   DECLARE_ACKNOWLEDGER (slur);
  29   DECLARE_END_ACKNOWLEDGER (slur);
  30   DECLARE_ACKNOWLEDGER (tie);
  31   DECLARE_ACKNOWLEDGER (bass_figure_alignment);
  32   DECLARE_END_ACKNOWLEDGER (bass_figure_alignment);
  33
  34   virtual void finalize ();
  35   void start_spanner ();
  36   void stop_spanner ();
  37   void stop_translation_timestep ();
  38 };
  39
  40 Figured_bass_position_engraver::Figured_bass_position_engraver ()
  41 {
  42   positioner_ = 0;
  43   bass_figure_alignment_ = 0;
  44 }
  45
  46 void
  47 Figured_bass_position_engraver::start_spanner ()
  48 {
  49   assert (!positioner_);
  50
  51   positioner_ = make_spanner("BassFigureAlignmentPositioning", bass_figure_alignment_->self_scm ());
  52   positioner_->set_bound (LEFT, bass_figure_alignment_->get_bound (LEFT));
  53   Axis_group_interface::add_element (positioner_, bass_figure_alignment_);
  54 }
  55
  56 void
  57 Figured_bass_position_engraver::stop_spanner ()
  58 {
  59   if (positioner_ && !positioner_->get_bound (RIGHT))
  60     {
  61       positioner_->set_bound (RIGHT, bass_figure_alignment_->get_bound (RIGHT));
  62     }
  63
  64   positioner_ = 0;
  65   bass_figure_alignment_ = 0;
  66 }
  67
  68 void
  69 Figured_bass_position_engraver::finalize ()
  70 {
  71   stop_spanner ();
  72 }
  73
  74 void
  75 Figured_bass_position_engraver::acknowledge_note_column (Grob_info info)
  76 {
  77   support_.push_back (info.grob ());
  78 }
  79
  80 void
  81 Figured_bass_position_engraver::acknowledge_end_slur (Grob_info info)
  82 {
  83   vector<Grob*>::iterator i = find (span_support_.begin (), span_support_.end (),
  84                                     info.grob ());
  85
  86   if (i < span_support_.end ())
  87     span_support_.erase (i);
  88 }
  89
  90 void
  91 Figured_bass_position_engraver::acknowledge_slur (Grob_info info)
  92 {
  93   span_support_.push_back (info.grob ());
  94 }
  95
  96 void
  97 Figured_bass_position_engraver::acknowledge_tie (Grob_info info)
  98 {
  99   support_.push_back (info.grob ());
 100 }
 101
 102 void
 103 Figured_bass_position_engraver::stop_translation_timestep ()
 104 {
 105   if (positioner_)
 106     {
 107       for (vsize i = 0; i < span_support_.size (); i++)
 108         Side_position_interface::add_support (positioner_, span_support_[i]);
 109       for (vsize i = 0; i < support_.size (); i++)
 110         Side_position_interface::add_support (positioner_, support_[i]);
 111     }
 112
 113   support_.clear ();
 114 }
 115
 116 void
 117 Figured_bass_position_engraver::acknowledge_end_bass_figure_alignment (Grob_info info)
 118 {
 119   (void)info;
 120   stop_spanner ();
 121 }
 122
 123 void
 124 Figured_bass_position_engraver::acknowledge_bass_figure_alignment (Grob_info info)
 125 {
 126   bass_figure_alignment_ = dynamic_cast<Spanner*> (info.grob ());
 127   start_spanner ();
 128 }
 129
 130
 131 ADD_ACKNOWLEDGER(Figured_bass_position_engraver,note_column);
 132 ADD_ACKNOWLEDGER(Figured_bass_position_engraver,slur);
 133 ADD_END_ACKNOWLEDGER(Figured_bass_position_engraver,slur);
 134
 135 ADD_ACKNOWLEDGER(Figured_bass_position_engraver,tie);
 136 ADD_ACKNOWLEDGER(Figured_bass_position_engraver,bass_figure_alignment);
 137 ADD_END_ACKNOWLEDGER(Figured_bass_position_engraver,bass_figure_alignment);
 138
 139 ADD_TRANSLATOR (Figured_bass_position_engraver,
 140                 /* doc */
 141                 "Position figured bass alignments over notes.",
 142
 143                 /* create */
 144                 "BassFigureAlignmentPositioning ",
 145
 146                 /* accept */ "",
 147
 148                 /* read */
 149                 " ",
 150                 /* write */ "");