2 event.cc -- implement Event
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
14 Event::get_length () const
16 Duration *d = unsmob_duration (get_property ("duration"));
22 return d->get_length ();
26 Event::compress (Moment m)
28 Duration *d = unsmob_duration (get_property ("duration"));
30 set_property ("duration", d ->compressed (m.main_part_).smobbed_copy ());
34 Event::transpose (Pitch delta)
37 TODO: should change music representation such that
38 _all_ pitch values are transposed automatically.
41 Pitch *p = unsmob_pitch (get_property ("pitch"));
45 Pitch np = p->transposed (delta);
47 if (abs (np.get_alteration ()) > DOUBLE_SHARP)
49 warning (_f ("Transposition by %s makes alteration larger than two",
53 set_property ("pitch", np.smobbed_copy ());
57 Event::to_relative_octave (Pitch last)
59 Pitch *old_pit = unsmob_pitch (get_property ("pitch"));
62 Pitch new_pit = *old_pit;
63 new_pit = new_pit.to_relative_octave (last);
65 SCM check = get_property ("absolute-octave");
66 if (gh_number_p (check) &&
67 new_pit.get_octave () != gh_scm2int (check))
69 String s =_("Failed octave check, got: ");
70 s += new_pit.to_string ();
71 new_pit = Pitch (gh_scm2int (check),
72 new_pit.get_notename (),
73 new_pit.get_alteration ());
76 s += new_pit.to_string ();
77 origin ()->warning (s);
80 set_property ("pitch", new_pit.smobbed_copy ());
93 LY_DEFINE (ly_music_duration_length, "ly:music-duration-length", 1, 0,0,
95 "Extract the duration field from @var{mus}, and return the length.")
97 Music* m = unsmob_music (mus);
98 SCM_ASSERT_TYPE (m, mus, SCM_ARG1, __FUNCTION__, "Music");
100 Duration *d = unsmob_duration (m->get_property ("duration"));
106 l = d->get_length ();
109 programming_error ("Music has no duration");
110 return l.smobbed_copy ();
115 LY_DEFINE (ly_music_duration_compress, "ly:music-duration-compress", 2, 0,0,
116 (SCM mus, SCM factor),
117 "Extract the duration field from @var{mus}, and compress it.")
119 Music* m = unsmob_music (mus);
120 Moment * f = unsmob_moment (factor);
121 SCM_ASSERT_TYPE (m, mus, SCM_ARG1, __FUNCTION__, "Music");
122 SCM_ASSERT_TYPE (f, factor, SCM_ARG2, __FUNCTION__, "Moment");
124 Duration *d = unsmob_duration (m->get_property ("duration"));
126 m->set_property ("duration", d->compressed (f->main_part_).smobbed_copy ());
127 return SCM_UNSPECIFIED;
133 This is hairy, since the scale in a key-change event may contain
137 TODO: this should use ly:pitch.
139 LY_DEFINE (ly_transpose_key_alist, "ly:transpose-key-alist",
140 2, 0,0, (SCM l, SCM pitch),
141 "Make a new key alist of @var{l} transposed by pitch @var{pitch}")
143 SCM newlist = SCM_EOL;
144 Pitch *p = unsmob_pitch (pitch);
146 for (SCM s = l; gh_pair_p (s); s = ly_cdr (s))
148 SCM key = ly_caar (s);
149 SCM alter = ly_cdar (s);
152 Pitch orig (gh_scm2int (ly_car (key)),
153 gh_scm2int (ly_cdr (key)),
156 orig =orig.transposed (*p);
158 SCM key = gh_cons (scm_int2num (orig.get_octave ()),
159 scm_int2num (orig.get_notename ()));
161 newlist = gh_cons (gh_cons (key, scm_int2num (orig.get_alteration ())),
164 else if (gh_number_p (key))
166 Pitch orig (0, gh_scm2int (key), gh_scm2int (alter));
167 orig = orig.transposed (*p);
169 key =scm_int2num (orig.get_notename ());
170 alter = scm_int2num (orig.get_alteration ());
171 newlist = gh_cons (gh_cons (key, alter), newlist);
174 return scm_reverse_x (newlist, SCM_EOL);
178 Key_change_ev::transpose (Pitch p)
180 SCM pa = get_property ("pitch-alist");
182 set_property ("pitch-alist", ly_transpose_key_alist (pa, p.smobbed_copy ()));
183 Pitch tonic = *unsmob_pitch (get_property ("tonic"));
184 set_property ("tonic",
185 tonic.smobbed_copy ());
189 alist_equal_p (SCM a, SCM b)
192 gh_pair_p (s); s = ly_cdr (s))
194 SCM key = ly_caar (s);
195 SCM val = ly_cdar (s);
196 SCM l = scm_assoc (key, b);
199 || !gh_equal_p ( ly_cdr (l), val))
205 ADD_MUSIC (Key_change_ev);