2 part-combine-music-iterator.cc -- implement Part_combine_music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "part-combine-music.hh"
10 #include "part-combine-music-iterator.hh"
11 #include "translator-group.hh"
12 #include "musical-request.hh"
15 Part_combine_music_iterator::Part_combine_music_iterator ()
23 Part_combine_music_iterator::~Part_combine_music_iterator ()
25 delete second_iter_p_;
30 Part_combine_music_iterator::next_moment () const
32 Moment first_next = first_iter_p_->next_moment ();
33 Moment second_next = second_iter_p_->next_moment ();
34 return first_next <? second_next;
38 Part_combine_music_iterator::ok () const
41 return first_iter_p_->ok ();
45 Part_combine_music_iterator::do_print () const
47 first_iter_p_->print ();
48 second_iter_p_->print ();
52 Part_combine_music_iterator::construct_children ()
54 Part_combine_music const * m = dynamic_cast<Part_combine_music const*> (music_l_);
56 first_iter_p_ = get_iterator_p (m->first_l ());
57 second_iter_p_ = get_iterator_p (m->second_l ());
61 Part_combine_music_iterator::change_to (Music_iterator *it, String to_type,
64 Translator_group * current = it->report_to_l ();
65 Translator_group * last = 0;
68 Cut & Paste from from Auto_change_iterator from Change_iterator (ugh).
70 TODO: abstract this function
73 /* find the type of translator that we're changing.
75 If \translator Staff = bass, then look for Staff = *
77 while (current && current->type_str_ != to_type)
80 current = current->daddy_trans_l_;
83 if (current && current->id_str_ == to_id)
86 msg += _ ("Can't switch translators, I'm there already");
92 Translator_group * dest =
93 it->report_to_l ()->find_create_translator_l (to_type, to_id);
94 current->remove_translator_p (last);
95 dest->add_translator (last);
100 We could change the current translator's id, but that would make
103 last->translator_id_str_ = change_l ()->change_to_id_str_;
105 error (_f ("I'm one myself: `%s'", to_type.ch_C ()));
108 error (_f ("none of these in my family: `%s'", to_id.ch_C ()));
111 Pitch_interrogate_req* first_spanish_inquisition; // nobody expects it
112 Pitch_interrogate_req* second_spanish_inquisition; // won't strike twice
115 Part_combine_music_iterator::do_process_and_next (Moment m)
117 Moment first_next = first_iter_p_->next_moment ();
118 Moment second_next = second_iter_p_->next_moment ();
120 bool changed_b = false;
121 Part_combine_music const * p = dynamic_cast<Part_combine_music const* > (music_l_);
123 String to_id = combined_b_ ? "first" : "second";
125 different rhythm for combined voices: separate
126 same rhythm for separated voices: combine
128 if ((first_next != second_next && combined_b_)
129 || (first_next == second_next && !combined_b_))
131 combined_b_ = !combined_b_;
132 to_id = combined_b_ ? "first" : "second";
133 change_to (second_iter_p_, p->what_str_, to_id);
137 Translator_group * fd =
138 first_iter_p_->report_to_l ()->find_create_translator_l (p->what_str_,
140 Translator_group * sd =
141 second_iter_p_->report_to_l ()->find_create_translator_l (p->what_str_,
144 fd->set_property ("first", SCM_BOOL_T);
146 sd->set_property ("second", SCM_BOOL_T);
149 first_iter_p_->process_and_next (m);
151 if (second_next <= m)
152 second_iter_p_->process_and_next (m);
154 Music_iterator::do_process_and_next (m);
159 * when combining two threads: check pitches, request stem directions
161 * a2-engraver to put texts a2/Solo/SoloII as appropriate.
163 * maybe the a2-engraver should set the stem directions, iso us?
166 Maybe different modes exist?
168 * Wind instruments (Flute I/II)
172 Rules for Hymnals/SATB (John Henckel <henckel@iname.com>):
174 1. if S and A differ by less than a third, the stems should be up/down.
175 2. else if S and A have different values, the stems should be up/down.
176 3. else if A sings "la" or higher, both S and A stems should be down.
177 4. else both stems should be up
179 * This may get really tricky: combining voices/staffs: string instruments
183 if (!first_spanish_inquisition)
184 first_spanish_inquisition = new Pitch_interrogate_req;
185 Music_iterator* fit = first_iter_p_->try_music (first_spanish_inquisition);
187 if (!second_spanish_inquisition)
188 second_spanish_inquisition = new Pitch_interrogate_req;
189 Music_iterator* sit = second_iter_p_->try_music (second_spanish_inquisition);
192 Hmm. In the case of a2, the second identical set of requests must
193 be junked: that's the whole point of detecting a2. Howto/whereto
197 && (first_next == second_next)
198 && first_spanish_inquisition->pitch_arr_.size ()
199 && (first_spanish_inquisition->pitch_arr_.size ()
200 == second_spanish_inquisition->pitch_arr_.size ())
201 && (first_spanish_inquisition->pitch_arr_[0] ==
202 second_spanish_inquisition->pitch_arr_[0]))
204 fd->set_property ("a2", SCM_BOOL_T);
205 sd->set_property ("a2", SCM_BOOL_T);
209 && first_spanish_inquisition->pitch_arr_.size ()
210 && !second_spanish_inquisition->pitch_arr_.size ())
212 fd->set_property ("solo", SCM_BOOL_T);
216 && !first_spanish_inquisition->pitch_arr_.size ()
217 && second_spanish_inquisition->pitch_arr_.size ())
219 sd->set_property ("solo2", SCM_BOOL_T);
222 first_spanish_inquisition->pitch_arr_.clear ();
223 second_spanish_inquisition->pitch_arr_.clear ();
227 Part_combine_music_iterator::try_music_in_children (Music *m) const
229 Music_iterator * i = first_iter_p_->try_music (m);
233 return second_iter_p_->try_music (m);