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--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7
   8 */
   9
  10 #include "engraver.hh"
  11
  12 #include "context.hh"
  13 #include "spanner.hh"
  14 #include "item.hh"
  15 #include "side-position-interface.hh"
  16 #include "translator.icc"
  17 #include "axis-group-interface.hh"
  18
  19 class Figured_bass_position_engraver : public Engraver
  20 {
  21   TRANSLATOR_DECLARATIONS (Figured_bass_position_engraver);
  22
  23   Spanner *bass_figure_alignment_;
  24   Spanner *positioner_;
  25   vector<Grob*> support_;
  26   vector<Grob*> span_support_;
  27 protected:
  28   DECLARE_ACKNOWLEDGER (note_column);
  29   DECLARE_ACKNOWLEDGER (slur);
  30   DECLARE_END_ACKNOWLEDGER (slur);
  31   DECLARE_ACKNOWLEDGER (tie);
  32   DECLARE_ACKNOWLEDGER (bass_figure_alignment);
  33   DECLARE_END_ACKNOWLEDGER (bass_figure_alignment);
  34
  35   virtual void finalize ();
  36   void start_spanner ();
  37   void stop_spanner ();
  38   void stop_translation_timestep ();
  39 };
  40
  41 Figured_bass_position_engraver::Figured_bass_position_engraver ()
  42 {
  43   positioner_ = 0;
  44   bass_figure_alignment_ = 0;
  45 }
  46
  47 void
  48 Figured_bass_position_engraver::start_spanner ()
  49 {
  50   assert (!positioner_);
  51
  52   positioner_ = make_spanner ("BassFigureAlignmentPositioning", bass_figure_alignment_->self_scm ());
  53   positioner_->set_bound (LEFT, bass_figure_alignment_->get_bound (LEFT));
  54   Axis_group_interface::add_element (positioner_, bass_figure_alignment_);
  55 }
  56
  57 void
  58 Figured_bass_position_engraver::stop_spanner ()
  59 {
  60   if (positioner_ && !positioner_->get_bound (RIGHT))
  61     {
  62       positioner_->set_bound (RIGHT, bass_figure_alignment_->get_bound (RIGHT));
  63     }
  64
  65   positioner_ = 0;
  66   bass_figure_alignment_ = 0;
  67 }
  68
  69 void
  70 Figured_bass_position_engraver::finalize ()
  71 {
  72   stop_spanner ();
  73 }
  74
  75 void
  76 Figured_bass_position_engraver::acknowledge_note_column (Grob_info info)
  77 {
  78   support_.push_back (info.grob ());
  79 }
  80
  81 void
  82 Figured_bass_position_engraver::acknowledge_end_slur (Grob_info info)
  83 {
  84   vector<Grob*>::iterator i = find (span_support_.begin (), span_support_.end (),
  85                                     info.grob ());
  86
  87   if (i < span_support_.end ())
  88     span_support_.erase (i);
  89 }
  90
  91 void
  92 Figured_bass_position_engraver::acknowledge_slur (Grob_info info)
  93 {
  94   span_support_.push_back (info.grob ());
  95 }
  96
  97 void
  98 Figured_bass_position_engraver::acknowledge_tie (Grob_info info)
  99 {
 100   support_.push_back (info.grob ());
 101 }
 102
 103 void
 104 Figured_bass_position_engraver::stop_translation_timestep ()
 105 {
 106   if (positioner_)
 107     {
 108       for (vsize i = 0; i < span_support_.size (); i++)
 109         Side_position_interface::add_support (positioner_, span_support_[i]);
 110       for (vsize i = 0; i < support_.size (); i++)
 111         Side_position_interface::add_support (positioner_, support_[i]);
 112     }
 113
 114   support_.clear ();
 115 }
 116
 117 void
 118 Figured_bass_position_engraver::acknowledge_end_bass_figure_alignment (Grob_info /* info */)
 119 {
 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                 /* read */
 147                 "",
 148
 149                 /* write */
 150                 ""
 151                 );