lily/repeat-tie-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2011 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
  22 #include "engraver.hh"
  23 #include "item.hh"
  24 #include "pointer-group-interface.hh"
  25 #include "stream-event.hh"
  26
  27 #include "translator.icc"
  28
  29 class Repeat_tie_engraver : public Engraver
  30 {
  31   Stream_event *event_;
  32   Grob *semi_tie_column_;
  33   vector<Grob*> semi_ties_;
  34
  35   void stop_translation_timestep ();
  36   DECLARE_ACKNOWLEDGER (note_head);
  37   DECLARE_TRANSLATOR_LISTENER (repeat_tie);
  38
  39 public:
  40   TRANSLATOR_DECLARATIONS (Repeat_tie_engraver);
  41 };
  42
  43 Repeat_tie_engraver::Repeat_tie_engraver ()
  44 {
  45   event_ = 0;
  46   semi_tie_column_ = 0;
  47 }
  48
  49 void
  50 Repeat_tie_engraver::stop_translation_timestep ()
  51 {
  52   event_ = 0;
  53   semi_tie_column_ = 0;
  54   semi_ties_.clear ();
  55 }
  56
  57 IMPLEMENT_TRANSLATOR_LISTENER (Repeat_tie_engraver, repeat_tie);
  58 void
  59 Repeat_tie_engraver::listen_repeat_tie (Stream_event *ev)
  60 {
  61   ASSIGN_EVENT_ONCE (event_, ev);
  62 }
  63
  64 void
  65 Repeat_tie_engraver::acknowledge_note_head (Grob_info inf)
  66 {
  67   if (!event_)
  68     return;
  69
  70   if (!semi_tie_column_)
  71     {
  72       semi_tie_column_ = make_item ("RepeatTieColumn", event_->self_scm ());
  73     }
  74
  75   SCM cause = event_->self_scm ();
  76   Grob *semi_tie = make_item ("RepeatTie", cause);
  77   semi_tie->set_object ("note-head", inf.grob ()->self_scm ());
  78
  79   Pointer_group_interface::add_grob (semi_tie_column_, ly_symbol2scm ("ties"),
  80                                      semi_tie);
  81   semi_tie->set_parent (semi_tie_column_, Y_AXIS);
  82   semi_ties_.push_back (semi_tie);
  83
  84
  85   if (is_direction (unsmob_stream_event (cause)->get_property ("direction")))
  86     {
  87       Direction d = to_dir (unsmob_stream_event (cause)->get_property ("direction"));
  88       semi_tie->set_property ("direction", scm_from_int (d));
  89     }
  90
  91 }
  92
  93 ADD_ACKNOWLEDGER (Repeat_tie_engraver, note_head);
  94 ADD_TRANSLATOR (Repeat_tie_engraver,
  95                 /* doc */
  96                 "Create repeat ties.",
  97
  98                 /* create */
  99                 "RepeatTie "
 100                 "RepeatTieColumn ",
 101
 102                 /* read */
 103                 "",
 104
 105                 /* write */
 106                 ""
 107                 );