lily/figured-bass-position-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6
   7   LilyPond is free software: you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation, either version 3 of the License, or
  10   (at your option) any later version.
  11
  12   LilyPond is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "engraver.hh"
  22
  23 #include "context.hh"
  24 #include "spanner.hh"
  25 #include "item.hh"
  26 #include "side-position-interface.hh"
  27 #include "translator.icc"
  28 #include "axis-group-interface.hh"
  29
  30 class Figured_bass_position_engraver : public Engraver
  31 {
  32   TRANSLATOR_DECLARATIONS (Figured_bass_position_engraver);
  33
  34   Spanner *bass_figure_alignment_;
  35   Spanner *positioner_;
  36   vector<Grob*> support_;
  37   vector<Grob*> span_support_;
  38 protected:
  39   DECLARE_ACKNOWLEDGER (note_column);
  40   DECLARE_ACKNOWLEDGER (slur);
  41   DECLARE_END_ACKNOWLEDGER (slur);
  42   DECLARE_ACKNOWLEDGER (tie);
  43   DECLARE_ACKNOWLEDGER (bass_figure_alignment);
  44   DECLARE_END_ACKNOWLEDGER (bass_figure_alignment);
  45
  46   virtual void finalize ();
  47   void start_spanner ();
  48   void stop_spanner ();
  49   void stop_translation_timestep ();
  50 };
  51
  52 Figured_bass_position_engraver::Figured_bass_position_engraver ()
  53 {
  54   positioner_ = 0;
  55   bass_figure_alignment_ = 0;
  56 }
  57
  58 void
  59 Figured_bass_position_engraver::start_spanner ()
  60 {
  61   assert (!positioner_);
  62
  63   positioner_ = make_spanner ("BassFigureAlignmentPositioning", bass_figure_alignment_->self_scm ());
  64   positioner_->set_bound (LEFT, bass_figure_alignment_->get_bound (LEFT));
  65   Axis_group_interface::add_element (positioner_, bass_figure_alignment_);
  66 }
  67
  68 void
  69 Figured_bass_position_engraver::stop_spanner ()
  70 {
  71   if (positioner_ && !positioner_->get_bound (RIGHT))
  72     {
  73       positioner_->set_bound (RIGHT, bass_figure_alignment_->get_bound (RIGHT));
  74     }
  75
  76   positioner_ = 0;
  77   bass_figure_alignment_ = 0;
  78 }
  79
  80 void
  81 Figured_bass_position_engraver::finalize ()
  82 {
  83   stop_spanner ();
  84 }
  85
  86 void
  87 Figured_bass_position_engraver::acknowledge_note_column (Grob_info info)
  88 {
  89   support_.push_back (info.grob ());
  90 }
  91
  92 void
  93 Figured_bass_position_engraver::acknowledge_end_slur (Grob_info info)
  94 {
  95   vector<Grob*>::iterator i = find (span_support_.begin (), span_support_.end (),
  96                                     info.grob ());
  97
  98   if (i < span_support_.end ())
  99     span_support_.erase (i);
 100 }
 101
 102 void
 103 Figured_bass_position_engraver::acknowledge_slur (Grob_info info)
 104 {
 105   span_support_.push_back (info.grob ());
 106 }
 107
 108 void
 109 Figured_bass_position_engraver::acknowledge_tie (Grob_info info)
 110 {
 111   support_.push_back (info.grob ());
 112 }
 113
 114 void
 115 Figured_bass_position_engraver::stop_translation_timestep ()
 116 {
 117   if (positioner_)
 118     {
 119       for (vsize i = 0; i < span_support_.size (); i++)
 120         Side_position_interface::add_support (positioner_, span_support_[i]);
 121       for (vsize i = 0; i < support_.size (); i++)
 122         Side_position_interface::add_support (positioner_, support_[i]);
 123     }
 124
 125   support_.clear ();
 126 }
 127
 128 void
 129 Figured_bass_position_engraver::acknowledge_end_bass_figure_alignment (Grob_info /* info */)
 130 {
 131   stop_spanner ();
 132 }
 133
 134 void
 135 Figured_bass_position_engraver::acknowledge_bass_figure_alignment (Grob_info info)
 136 {
 137   bass_figure_alignment_ = dynamic_cast<Spanner*> (info.grob ());
 138   start_spanner ();
 139 }
 140
 141
 142 ADD_ACKNOWLEDGER (Figured_bass_position_engraver, note_column);
 143 ADD_ACKNOWLEDGER (Figured_bass_position_engraver, slur);
 144 ADD_END_ACKNOWLEDGER (Figured_bass_position_engraver, slur);
 145
 146 ADD_ACKNOWLEDGER (Figured_bass_position_engraver, tie);
 147 ADD_ACKNOWLEDGER (Figured_bass_position_engraver, bass_figure_alignment);
 148 ADD_END_ACKNOWLEDGER (Figured_bass_position_engraver, bass_figure_alignment);
 149
 150 ADD_TRANSLATOR (Figured_bass_position_engraver,
 151                 /* doc */
 152                 "Position figured bass alignments over notes.",
 153
 154                 /* create */
 155                 "BassFigureAlignmentPositioning ",
 156
 157                 /* read */
 158                 "",
 159
 160                 /* write */
 161                 ""
 162                 );