2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2011 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 DECLARE_TRANSLATOR_LISTENER (glissando);
39 DECLARE_ACKNOWLEDGER (note_column);
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;
63 IMPLEMENT_TRANSLATOR_LISTENER (Glissando_engraver, glissando);
65 Glissando_engraver::listen_glissando (Stream_event *ev)
67 ASSIGN_EVENT_ONCE (event_, ev);
71 Glissando_engraver::process_music ()
74 start_glissandi_ = true;
78 Glissando_engraver::acknowledge_note_column (Grob_info info)
80 Grob *g = info.grob ();
81 if (to_boolean (g->get_property ("glissando-skip")))
86 extract_grob_set (g, "note-heads", note_heads);
87 int glissando_index = 0;
88 for (vsize i = 0; i < note_column_1.size (); i++)
90 if (note_column_2[i] >= note_heads.size ())
92 kill_me_.push_back (lines_[i]);
93 announce_end_grob (lines_[i], SCM_EOL);
97 lines_[i]->set_bound (RIGHT, note_heads[note_column_2[i]]);
98 lines_[i]->set_property ("glissando-index", scm_from_int (glissando_index));
100 announce_end_grob (lines_[i], note_heads[note_column_2[i]]->self_scm ());
104 note_column_1.clear ();
105 note_column_2.clear ();
106 stop_glissandi_ = false;
109 if (start_glissandi_)
111 extract_grob_set (g, "note-heads", note_heads);
112 SCM map = get_property ("glissandoMap");
114 for (vsize i = 0; i < note_heads.size (); i++)
116 note_column_1.push_back (i);
117 note_column_2.push_back (i);
120 for (SCM m = map; scm_is_pair (m); m = scm_cdr (m))
122 SCM candidate = scm_car (m);
123 if (!scm_is_pair (candidate))
125 int n1 = robust_scm2int (scm_car (candidate), -1);
126 int n2 = robust_scm2int (scm_cdr (candidate), -1);
127 if ((n1 < 0) || (n2 < 0) || (size_t (n1) >= note_heads.size ()))
129 note_column_1.push_back (vsize (n1));
130 note_column_2.push_back (vsize (n2));
132 for (vsize i = 0; i < note_column_1.size (); i++)
134 lines_.push_back (make_spanner ("Glissando", event_->self_scm ()));
135 lines_.back ()->set_bound (LEFT, note_heads[note_column_1[i]]);
141 Glissando_engraver::stop_translation_timestep ()
143 if (start_glissandi_)
146 programming_error ("overwriting glissando");
147 stop_glissandi_ = true;
148 start_glissandi_ = false;
154 Glissando_engraver::finalize ()
156 if (!lines_.empty ())
158 string msg = _ ("unterminated glissando");
161 event_->origin ()->warning (msg);
165 for (vsize i = 0; i < lines_.size (); i++)
166 lines_[i]->suicide ();
169 for (vsize i = 0; i < kill_me_.size (); i++)
170 kill_me_[i]->suicide ();
173 ADD_ACKNOWLEDGER (Glissando_engraver, note_column);
174 ADD_TRANSLATOR (Glissando_engraver,
176 "Engrave glissandi.",