lily/figured-bass-position-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2015 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   void acknowledge_note_column (Grob_info);
  40   void acknowledge_slur (Grob_info);
  41   void acknowledge_end_slur (Grob_info);
  42   void acknowledge_end_tie (Grob_info);
  43   void acknowledge_bass_figure_alignment (Grob_info);
  44   void acknowledge_end_bass_figure_alignment (Grob_info);
  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 (Context *c)
  53   : Engraver (c)
  54 {
  55   positioner_ = 0;
  56   bass_figure_alignment_ = 0;
  57 }
  58
  59 void
  60 Figured_bass_position_engraver::start_spanner ()
  61 {
  62   assert (!positioner_);
  63
  64   positioner_ = make_spanner ("BassFigureAlignmentPositioning", bass_figure_alignment_->self_scm ());
  65   positioner_->set_bound (LEFT, bass_figure_alignment_->get_bound (LEFT));
  66   Axis_group_interface::add_element (positioner_, bass_figure_alignment_);
  67 }
  68
  69 void
  70 Figured_bass_position_engraver::stop_spanner ()
  71 {
  72   if (positioner_ && !positioner_->get_bound (RIGHT))
  73     {
  74       positioner_->set_bound (RIGHT, bass_figure_alignment_->get_bound (RIGHT));
  75     }
  76
  77   positioner_ = 0;
  78   bass_figure_alignment_ = 0;
  79 }
  80
  81 void
  82 Figured_bass_position_engraver::finalize ()
  83 {
  84   stop_spanner ();
  85 }
  86
  87 void
  88 Figured_bass_position_engraver::acknowledge_note_column (Grob_info info)
  89 {
  90   support_.push_back (info.grob ());
  91 }
  92
  93 void
  94 Figured_bass_position_engraver::acknowledge_end_slur (Grob_info info)
  95 {
  96   vector<Grob *>::iterator i = find (span_support_.begin (), span_support_.end (),
  97                                      info.grob ());
  98
  99   if (i < span_support_.end ())
 100     span_support_.erase (i);
 101 }
 102
 103 void
 104 Figured_bass_position_engraver::acknowledge_slur (Grob_info info)
 105 {
 106   span_support_.push_back (info.grob ());
 107 }
 108
 109 void
 110 Figured_bass_position_engraver::acknowledge_end_tie (Grob_info info)
 111 {
 112   support_.push_back (info.grob ());
 113 }
 114
 115 void
 116 Figured_bass_position_engraver::stop_translation_timestep ()
 117 {
 118   if (positioner_)
 119     {
 120       for (vsize i = 0; i < span_support_.size (); i++)
 121         Side_position_interface::add_support (positioner_, span_support_[i]);
 122       for (vsize i = 0; i < support_.size (); i++)
 123         Side_position_interface::add_support (positioner_, support_[i]);
 124     }
 125
 126   support_.clear ();
 127 }
 128
 129 void
 130 Figured_bass_position_engraver::acknowledge_end_bass_figure_alignment (Grob_info /* info */)
 131 {
 132   stop_spanner ();
 133 }
 134
 135 void
 136 Figured_bass_position_engraver::acknowledge_bass_figure_alignment (Grob_info info)
 137 {
 138   bass_figure_alignment_ = dynamic_cast<Spanner *> (info.grob ());
 139   start_spanner ();
 140 }
 141
 142
 143
 144 void
 145 Figured_bass_position_engraver::boot ()
 146 {
 147   ADD_ACKNOWLEDGER (Figured_bass_position_engraver, note_column);
 148   ADD_ACKNOWLEDGER (Figured_bass_position_engraver, slur);
 149   ADD_END_ACKNOWLEDGER (Figured_bass_position_engraver, slur);
 150   ADD_END_ACKNOWLEDGER (Figured_bass_position_engraver, tie);
 151   ADD_ACKNOWLEDGER (Figured_bass_position_engraver, bass_figure_alignment);
 152   ADD_END_ACKNOWLEDGER (Figured_bass_position_engraver, bass_figure_alignment);
 153 }
 154
 155 ADD_TRANSLATOR (Figured_bass_position_engraver,
 156                 /* doc */
 157                 "Position figured bass alignments over notes.",
 158
 159                 /* create */
 160                 "BassFigureAlignmentPositioning ",
 161
 162                 /* read */
 163                 "",
 164
 165                 /* write */
 166                 ""
 167                );