source file of the GNU LilyPond music typesetter
- (c) 1996--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "event.hh"
#include "warn.hh"
-#include "event.hh"
-
-Moment
-Event::get_length () const
-{
- Duration *d = unsmob_duration (get_property ("duration"));
- if (!d)
- {
- Moment m ;
- return m;
- }
- return d->get_length ();
-}
-
-void
-Event::compress (Moment m)
-{
- Duration *d = unsmob_duration (get_property ("duration"));
- if (d)
- set_property ("duration", d ->compressed (m.main_part_).smobbed_copy ());
-}
-
-void
-Event::transpose (Pitch delta)
-{
- /*
- TODO: should change music representation such that
- _all_ pitch values are transposed automatically.
- */
-
- Pitch *p = unsmob_pitch (get_property ("pitch"));
- if (!p)
- return ;
-
- Pitch np = p->transposed (delta);
-
- if (abs (np.get_alteration ()) > DOUBLE_SHARP)
- {
- warning (_f ("Transposition by %s makes alteration larger than two",
- delta.to_string ()));
- }
-
- set_property ("pitch", np.smobbed_copy ());
-}
-
-Pitch
-Event::to_relative_octave (Pitch last)
-{
- Pitch *old_pit = unsmob_pitch (get_property ("pitch"));
- if (old_pit)
- {
- Pitch new_pit = *old_pit;
- new_pit = new_pit.to_relative_octave (last);
-
- SCM check = get_property ("absolute-octave");
- if (ly_c_number_p (check) &&
- new_pit.get_octave () != scm_to_int (check))
- {
- Pitch expected_pit (scm_to_int (check),
- new_pit.get_notename (),
- new_pit.get_alteration ());
- origin ()->warning (_f ("octave check failed; expected %s, found: %s",
- expected_pit.to_string (),
- new_pit.to_string ()));
- new_pit = expected_pit;
- }
-
- set_property ("pitch", new_pit.smobbed_copy ());
-
- return new_pit;
- }
- return last;
-}
-
-Event::Event ()
- : Music ()
-{
-}
-ADD_MUSIC (Event);
-
-LY_DEFINE (ly_music_duration_length, "ly:music-duration-length", 1, 0,0,
- (SCM mus),
- "Extract the duration field from @var{mus}, and return the length.")
+MAKE_SCHEME_CALLBACK(Event,length_callback,1);
+SCM
+Event::length_callback (SCM m)
{
- Music* m = unsmob_music (mus);
- SCM_ASSERT_TYPE (m, mus, SCM_ARG1, __FUNCTION__, "Music");
-
- Duration *d = unsmob_duration (m->get_property ("duration"));
+ Music* me = unsmob_music (m);
+ Duration *d = unsmob_duration (me->get_property ("duration"));
- Moment l ;
-
+ Moment mom;
if (d)
{
- l = d->get_length ();
+ mom = d->get_length ();
}
- else
- programming_error ("Music has no duration");
- return l.smobbed_copy ();
-
+ return mom.smobbed_copy();
}
-
-
-LY_DEFINE (ly_music_duration_compress, "ly:music-duration-compress", 2, 0,0,
- (SCM mus, SCM fact),
- "Compress @var{mus} by factor @var{fact}, which is a @code{Moment}.")
-{
- Music* m = unsmob_music (mus);
- Moment * f = unsmob_moment (fact);
- SCM_ASSERT_TYPE (m, mus, SCM_ARG1, __FUNCTION__, "Music");
- SCM_ASSERT_TYPE (f, fact, SCM_ARG2, __FUNCTION__, "Moment");
- Duration *d = unsmob_duration (m->get_property ("duration"));
- if (d)
- m->set_property ("duration", d->compressed (f->main_part_).smobbed_copy ());
- return SCM_UNSPECIFIED;
-}
-
-
-
-/*
- This is hairy, since the scale in a key-change event may contain
- octaveless notes.
-
-
- TODO: this should use ly:pitch.
- */
-LY_DEFINE (ly_transpose_key_alist, "ly:transpose-key-alist",
- 2, 0, 0, (SCM l, SCM pit),
- "Make a new key alist of @var{l} transposed by pitch @var{pit}")
+Event::Event (SCM i)
+ : Music (i)
{
- SCM newlist = SCM_EOL;
- Pitch *p = unsmob_pitch (pit);
-
- for (SCM s = l; ly_c_pair_p (s); s = ly_cdr (s))
+ if (!ly_c_procedure_p (length_callback_))
{
- SCM key = ly_caar (s);
- SCM alter = ly_cdar (s);
- if (ly_c_pair_p (key))
- {
- Pitch orig (scm_to_int (ly_car (key)),
- scm_to_int (ly_cdr (key)),
- scm_to_int (alter));
-
- orig =orig.transposed (*p);
-
- SCM key = scm_cons (scm_int2num (orig.get_octave ()),
- scm_int2num (orig.get_notename ()));
-
- newlist = scm_cons (scm_cons (key, scm_int2num (orig.get_alteration ())),
- newlist);
- }
- else if (ly_c_number_p (key))
- {
- Pitch orig (0, scm_to_int (key), scm_to_int (alter));
- orig = orig.transposed (*p);
-
- key =scm_int2num (orig.get_notename ());
- alter = scm_int2num (orig.get_alteration ());
- newlist = scm_cons (scm_cons (key, alter), newlist);
- }
+ length_callback_ = length_callback_proc;
}
- return scm_reverse_x (newlist, SCM_EOL);
}
-void
-Key_change_ev::transpose (Pitch p)
-{
- SCM pa = get_property ("pitch-alist");
-
- set_property ("pitch-alist", ly_transpose_key_alist (pa, p.smobbed_copy ()));
- Pitch tonic = *unsmob_pitch (get_property ("tonic"));
- set_property ("tonic",
- tonic.smobbed_copy ());
-}
+ADD_MUSIC (Event);
-bool
-alist_equal_p (SCM a, SCM b)
-{
- for (SCM s = a;
- ly_c_pair_p (s); s = ly_cdr (s))
- {
- SCM key = ly_caar (s);
- SCM val = ly_cdar (s);
- SCM l = scm_assoc (key, b);
- if (l == SCM_BOOL_F
- || !ly_c_equal_p ( ly_cdr (l), val))
- return false;
- }
- return true;
-}
-ADD_MUSIC (Key_change_ev);
projects / lilypond.git / blobdiff