2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2015 Jan Nieuwenhuizen <janneke@gnu.org>
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.
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.
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/>.
20 #include "engraver.hh"
22 #include "international.hh"
23 #include "pointer-group-interface.hh"
24 #include "rhythmic-head.hh"
26 #include "stream-event.hh"
30 #include "translator.icc"
32 class Glissando_engraver : public Engraver
35 TRANSLATOR_DECLARATIONS (Glissando_engraver);
38 void listen_glissando (Stream_event *);
39 void acknowledge_note_column (Grob_info);
40 virtual void finalize ();
42 void stop_translation_timestep ();
43 void process_music ();
46 vector<Spanner *> lines_;
47 vector<Spanner *> kill_me_;
48 bool start_glissandi_;
52 vector<vsize> note_column_1;
53 vector<vsize> note_column_2;
56 Glissando_engraver::Glissando_engraver ()
59 start_glissandi_ = false;
60 stop_glissandi_ = false;
64 Glissando_engraver::listen_glissando (Stream_event *ev)
66 ASSIGN_EVENT_ONCE (event_, ev);
70 Glissando_engraver::process_music ()
73 start_glissandi_ = true;
77 Glissando_engraver::acknowledge_note_column (Grob_info info)
79 Grob *g = info.grob ();
80 if (to_boolean (g->get_property ("glissando-skip")))
85 extract_grob_set (g, "note-heads", note_heads);
86 int glissando_index = 0;
87 for (vsize i = 0; i < note_column_1.size (); i++)
89 if (note_column_2[i] >= note_heads.size ())
91 kill_me_.push_back (lines_[i]);
92 announce_end_grob (lines_[i], SCM_EOL);
96 lines_[i]->set_bound (RIGHT, note_heads[note_column_2[i]]);
97 lines_[i]->set_property ("glissando-index", scm_from_int (glissando_index));
99 announce_end_grob (lines_[i], note_heads[note_column_2[i]]->self_scm ());
103 note_column_1.clear ();
104 note_column_2.clear ();
105 stop_glissandi_ = false;
108 if (start_glissandi_)
110 extract_grob_set (g, "note-heads", note_heads);
111 SCM map = get_property ("glissandoMap");
112 if (scm_is_null (map))
113 for (vsize i = 0; i < note_heads.size (); i++)
115 note_column_1.push_back (i);
116 note_column_2.push_back (i);
119 for (SCM m = map; scm_is_pair (m); m = scm_cdr (m))
121 SCM candidate = scm_car (m);
122 if (!scm_is_pair (candidate))
124 int n1 = robust_scm2int (scm_car (candidate), -1);
125 int n2 = robust_scm2int (scm_cdr (candidate), -1);
126 if ((n1 < 0) || (n2 < 0) || (size_t (n1) >= note_heads.size ()))
128 note_column_1.push_back (vsize (n1));
129 note_column_2.push_back (vsize (n2));
131 for (vsize i = 0; i < note_column_1.size (); i++)
133 lines_.push_back (make_spanner ("Glissando", event_->self_scm ()));
134 lines_.back ()->set_bound (LEFT, note_heads[note_column_1[i]]);
140 Glissando_engraver::stop_translation_timestep ()
142 if (start_glissandi_)
145 programming_error ("overwriting glissando");
146 stop_glissandi_ = true;
147 start_glissandi_ = false;
153 Glissando_engraver::finalize ()
155 if (!lines_.empty ())
157 string msg = _ ("unterminated glissando");
160 event_->origin ()->warning (msg);
164 for (vsize i = 0; i < lines_.size (); i++)
165 lines_[i]->suicide ();
168 for (vsize i = 0; i < kill_me_.size (); i++)
169 kill_me_[i]->suicide ();
173 Glissando_engraver::boot ()
175 ADD_LISTENER (Glissando_engraver, glissando);
176 ADD_ACKNOWLEDGER (Glissando_engraver, note_column);
179 ADD_TRANSLATOR (Glissando_engraver,
181 "Engrave glissandi.",