lily/articulations.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2010--2011 Carl Sorensen <c_sorensen@byu.edu>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19 #include "engraver.hh"
  20
  21 #include "articulations.hh"
  22 #include "stream-event.hh"
  23 #include "warn.hh"
  24 #include "context.hh"
  25
  26 /*
  27   Return an articulation list given a note_events vector and an
  28   articulation_events vector.
  29
  30   This is necessary, because the articulations come as events if
  31   they are entered outside of a chord structure, and as articulations
  32   if they are inside the chord structure.  So potentially we need to
  33   combine the two types.
  34 */
  35
  36 SCM
  37 articulation_list (vector<Stream_event *> note_events,
  38                    vector<Stream_event *> articulation_events,
  39                    char const *articulation_name)
  40 {
  41   vector<Stream_event *> string_events;
  42   SCM articulations = SCM_EOL;
  43   vsize j = 0;
  44
  45   for (vsize i = 0; i < note_events.size (); i++)
  46     {
  47
  48       Stream_event *event = note_events[i];
  49
  50       Stream_event *articulation_event = 0;
  51
  52       /*
  53         For notes inside a chord construct, string indications are
  54         stored as articulations on the note, so we check through
  55         the notes
  56       */
  57       for (SCM s = event->get_property ("articulations");
  58            !articulation_event && scm_is_pair (s); s = scm_cdr (s))
  59         {
  60           Stream_event *art = unsmob_stream_event (scm_car (s));
  61
  62           if (art->in_event_class (articulation_name))
  63             articulation_event = art;
  64         }
  65
  66       /*
  67         For string indications listed outside a chord construct,
  68         a string_number_event is generated, so if there was no string
  69         in the articulations, we check for string events outside
  70         the chord construct
  71       */
  72       if (!articulation_event && j < articulation_events.size ())
  73         {
  74           articulation_event = articulation_events[j];
  75           if (j + 1 < articulation_events.size ())
  76             j++;
  77         }
  78       articulations = scm_cons ((articulation_event
  79                                  ? articulation_event->self_scm ()
  80                                  : SCM_EOL),
  81                                 articulations);
  82     }
  83
  84   return (scm_reverse (articulations));
  85 }