2 music-scheme.cc -- implement
4 source file of the GNU LilyPond music typesetter
6 (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
13 LY_DEFINE (ly_music_length, "ly:music-length",
15 "Get the length of music expression @var{mus}, and return as a @code{Moment} object.")
17 Music *sc = unsmob_music (mus);
18 SCM_ASSERT_TYPE (sc, mus, SCM_ARG1, __FUNCTION__, "music");
19 return sc->get_length ().smobbed_copy ();
22 LY_DEFINE (ly_music_property,
23 "ly:music-property", 2, 0, 0, (SCM mus, SCM sym),
24 "Get the property @var{sym} of music expression @var{mus}.\n"
25 "If @var{sym} is undefined, return @code{' ()}.\n" )
27 Music * sc = unsmob_music (mus);
28 SCM_ASSERT_TYPE (sc, mus, SCM_ARG1, __FUNCTION__, "music");
29 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
31 return sc->internal_get_property (sym);
34 LY_DEFINE (ly_music_set_property, "ly:music-set-property!",
35 3, 0, 0, (SCM mus, SCM sym, SCM val),
36 "Set property @var{sym} in music expression @var{mus} to @var{val}.")
38 Music * sc = unsmob_music (mus);
39 SCM_ASSERT_TYPE (sc, mus, SCM_ARG1, __FUNCTION__, "music");
40 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
42 bool ok = type_check_assignment (sym, val, ly_symbol2scm ("music-type?"));
45 sc->internal_set_property (sym, val);
48 return SCM_UNSPECIFIED;
51 LY_DEFINE (ly_music_name, "ly:music-name",
53 "Return the name of @var{music}.")
55 Music *m = unsmob_music (mus);
56 SCM_ASSERT_TYPE (m, mus, SCM_ARG1, __FUNCTION__ ,"music");
58 char const *nm = classname (m);
59 return scm_makfrom0str (nm);
62 /* todo: property args */
63 LY_DEFINE (ly_extended_make_music, "ly:make-bare-music",
64 2, 0, 0, (SCM type, SCM props),
65 "Make a C++ music object of type @var{type}, initialize with\n"
68 "This function is for internal use, and is only called by "
69 "@code{make-music}, which is the preferred interface "
70 "for creating music objects. "
73 SCM_ASSERT_TYPE (scm_is_string (type), type, SCM_ARG1, __FUNCTION__, "string");
74 SCM s = make_music (ly_scm2string (type))->self_scm ();
75 unsmob_music (s)->immutable_property_alist_ = props;
76 scm_gc_unprotect_object (s);
80 /* todo: property args */
81 LY_DEFINE (ly_music_mutable_properties, "ly:music-mutable-properties",
83 "Return an alist containing the mutable properties of @var{mus}.\n"
84 "The immutable properties are not available, since "
85 "they are constant and initialized by the "
86 "@code{make-music} function.\n")
88 Music *m = unsmob_music (mus);
89 SCM_ASSERT_TYPE (m, mus, SCM_ARG1, __FUNCTION__, "music");
90 return m->get_property_alist (true);
93 LY_DEFINE (ly_music_list_p,"ly:music-list?",
95 "Type predicate: return true if @var{lst} is a list "
98 if (scm_list_p (lst) == SCM_BOOL_T)
99 while (scm_is_pair (lst))
101 if (!unsmob_music (scm_car (lst)))
109 LY_DEFINE (ly_music_deep_copy, "ly:music-deep-copy",
111 "Copy @var{m} and all sub expressions of @var{m}")
114 if (unsmob_music (m))
116 copy = unsmob_music (m)->clone ()->self_scm ();
117 scm_gc_unprotect_object (copy);
119 else if (scm_is_pair (m))
120 copy = scm_cons (ly_music_deep_copy (scm_car (m)),
121 ly_music_deep_copy (scm_cdr (m)));
125 LY_DEFINE (ly_music_transpose, "ly:music-transpose",
126 2, 0, 0, (SCM m, SCM p),
127 "Transpose @var{m} such that central C is mapped to @var{p}. "
130 Music * sc = unsmob_music (m);
131 Pitch * sp = unsmob_pitch (p);
132 SCM_ASSERT_TYPE (sc, m, SCM_ARG1, __FUNCTION__, "music");
133 SCM_ASSERT_TYPE (sp, p, SCM_ARG2, __FUNCTION__, "pitch");
137 return sc->self_scm ();
141 TODO: should take moment factor?
143 LY_DEFINE (ly_music_compress, "ly:music-compress",
144 2, 0, 0, (SCM m, SCM factor),
145 "Compress music object @var{m} by moment @var{factor}."
148 Music * sc = unsmob_music (m);
150 SCM_ASSERT_TYPE (sc, m, SCM_ARG1, __FUNCTION__, "music");
151 SCM_ASSERT_TYPE (unsmob_moment (factor), factor, SCM_ARG2, __FUNCTION__, "moment");
153 sc->compress (*unsmob_moment (factor));
154 return sc->self_scm ();