2 music.cc -- implement Music
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "duration.hh"
12 #include "input-smob.hh"
13 #include "ly-smobs.icc"
15 #include "music-list.hh"
21 Music::internal_is_music_type (SCM k) const
23 SCM ifs = get_property ("types");
25 return scm_c_memq (k, ifs) != SCM_BOOL_F;
31 SCM nm = get_property ("name");
32 if (scm_is_symbol (nm))
34 return ly_symbol2string (nm);
38 return classname (this);
42 Music::Music (SCM init)
45 immutable_property_alist_ = init;
46 mutable_property_alist_ = SCM_EOL;
49 length_callback_ = get_property ("length-callback");
50 start_callback_ = get_property ("start-callback");
53 Music::Music (Music const &m)
55 immutable_property_alist_ = m.immutable_property_alist_;
56 mutable_property_alist_ = SCM_EOL;
59 /* First we smobify_self, then we copy over the stuff. If we don't,
60 stack vars that hold the copy might be optimized away, meaning
61 that they won't be protected from GC. */
63 mutable_property_alist_ = ly_music_deep_copy (m.mutable_property_alist_);
64 length_callback_ = m.length_callback_;
65 start_callback_ = m.start_callback_;
66 set_spot (*m.origin ());
76 Music::get_property_alist (bool m) const
78 return (m) ? mutable_property_alist_ : immutable_property_alist_;
82 Music::mark_smob (SCM m)
84 Music *mus = (Music*) SCM_CELL_WORD_1 (m);
85 scm_gc_mark (mus->immutable_property_alist_);
86 scm_gc_mark (mus->mutable_property_alist_);
91 Music::get_length () const
93 SCM lst = get_property ("length");
94 if (unsmob_moment (lst))
95 return *unsmob_moment (lst);
97 if (ly_c_procedure_p (length_callback_))
99 SCM res = scm_call_1 (length_callback_, self_scm ());
100 return *unsmob_moment (res);
107 Music::start_mom () const
109 SCM lst = get_property ("start-callback");
110 if (ly_c_procedure_p (lst))
112 SCM res = scm_call_1 (lst, self_scm ());
113 return *unsmob_moment (res);
121 print_alist (SCM a, SCM port)
123 /* SCM_EOL -> catch malformed lists. */
124 for (SCM s = a; scm_is_pair (s); s = scm_cdr (s))
126 scm_display (scm_caar (s), port);
127 scm_puts (" = ", port);
128 scm_write (scm_cdar (s), port);
129 scm_puts ("\n", port);
134 Music::print_smob (SCM s, SCM p, scm_print_state*)
136 scm_puts ("#<Music ", p);
137 Music* m = unsmob_music (s);
139 SCM nm = m->get_property ("name");
140 if (scm_is_symbol (nm) || scm_is_string (nm))
143 scm_puts (classname (m),p);
145 /* Printing properties takes a lot of time, especially during backtraces.
146 For inspecting, it is better to explicitly use an inspection
154 Music::to_relative_octave (Pitch p)
156 SCM elt = get_property ("element");
158 if (Music *m = unsmob_music (elt))
159 p = m->to_relative_octave (p);
161 p = music_list_to_relative (get_property ("elements"), p, false);
166 Music::compress (Moment factor)
168 SCM elt = get_property ("element");
170 if (Music *m = unsmob_music (elt))
171 m->compress (factor);
173 compress_music_list (get_property ("elements"), factor);
177 Music::transpose (Pitch delta)
179 for (SCM s = this->get_property_alist (true); scm_is_pair (s); s = scm_cdr (s))
181 SCM entry = scm_car (s);
182 SCM val = scm_cdr (entry);
184 if (Pitch * p = unsmob_pitch (val))
186 Pitch transposed = p->transposed (delta);
187 scm_set_cdr_x (entry, transposed.smobbed_copy ());
189 if (abs (transposed.get_alteration ()) > DOUBLE_SHARP)
191 warning (_f ("Transposition by %s makes alteration larger than two",
192 delta.to_string ()));
197 SCM elt = get_property ("element");
199 if (Music* m = unsmob_music (elt))
200 m->transpose (delta);
202 transpose_music_list (get_property ("elements"), delta);
205 IMPLEMENT_TYPE_P (Music, "ly:music?");
206 IMPLEMENT_SMOBS (Music);
207 IMPLEMENT_DEFAULT_EQUAL_P (Music);
210 Music::internal_get_property (SCM sym) const
212 SCM s = scm_sloppy_assq (sym, mutable_property_alist_);
216 s = scm_sloppy_assq (sym, immutable_property_alist_);
217 return (s == SCM_BOOL_F) ? SCM_EOL : scm_cdr (s);
221 Music::internal_set_property (SCM s, SCM v)
223 if (do_internal_type_checking_global)
224 if (!type_check_assignment (s, v, ly_symbol2scm ("music-type?")))
227 mutable_property_alist_ = scm_assq_set_x (mutable_property_alist_, s, v);
231 Music::set_spot (Input ip)
233 set_property ("origin", make_input (ip));
237 Music::origin () const
239 Input *ip = unsmob_input (get_property ("origin"));
240 return ip ? ip : & dummy_input_global;
244 Music::duration_log () const
246 if (is_mus_type ("rhythmic-event"))
247 return unsmob_duration (get_property ("duration"))->duration_log ();
252 make_music_by_name (SCM sym)
254 SCM make_music_proc = ly_lily_module_constant ("make-music");
255 SCM rv = scm_call_1 (make_music_proc, sym);
258 scm_gc_protect_object (rv);
259 return unsmob_music (rv);