2 grob-scheme.cc -- Scheme entry points for the grob datatype
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2005 Jan Nieuwenhuizen <janneke@gnu.org>
7 Han-Wen Nienhuys <hanwen@cs.uu.nl>
14 #include "output-def.hh"
16 #include "font-interface.hh"
19 LY_DEFINE (ly_grob_set_callback_x, "ly:grob-set-callback!",
20 3, 0, 0, (SCM grob, SCM sym, SCM proc),
21 "Set @var{sym} in grob @var{grob} to value @var{proc}")
23 Grob *sc = unsmob_grob (grob);
24 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
25 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
26 SCM_ASSERT_TYPE (ly_is_procedure (proc), proc, SCM_ARG3, __FUNCTION__, "procedure");
28 sc->set_callback (sym, proc);
29 return SCM_UNSPECIFIED;
32 LY_DEFINE (ly_grob_set_property_x, "ly:grob-set-property!",
33 3, 0, 0, (SCM grob, SCM sym, SCM val),
34 "Set @var{sym} in grob @var{grob} to value @var{val}")
36 Grob *sc = unsmob_grob (grob);
37 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
38 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
40 if (!type_check_assignment (sym, val, ly_symbol2scm ("backend-type?")))
41 error ("typecheck failed");
43 sc->internal_set_property (sym, val);
44 return SCM_UNSPECIFIED;
47 LY_DEFINE (ly_grob_property, "ly:grob-property",
48 2, 0, 0, (SCM grob, SCM sym),
49 "Return the value of a value in grob @var{g} of property @var{sym}. "
50 "It will return @code{' ()} (end-of-list) "
51 "if @var{sym} is undefined in @var{g}."
54 Grob *sc = unsmob_grob (grob);
55 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
56 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
58 return sc->internal_get_property (sym);
62 LY_DEFINE (ly_grob_interfaces, "ly:grob-interfaces",
64 "Return the interfaces list of grob @var{grob}.")
66 Grob *sc = unsmob_grob (grob);
67 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
69 return sc->get_interfaces ();
72 LY_DEFINE (ly_grob_object, "ly:grob-object",
73 2, 0, 0, (SCM grob, SCM sym),
74 "Return the value of a pointer in grob @var{g} of property @var{sym}. "
75 "It will return @code{' ()} (end-of-list) "
76 "if @var{sym} is undefined in @var{g}."
79 Grob *sc = unsmob_grob (grob);
80 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
81 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
83 return sc->internal_get_object (sym);
86 LY_DEFINE (ly_spanner_get_bound, "ly:spanner-get-bound",
87 2, 0, 0, (SCM slur, SCM dir),
88 "Get one of the bounds of @var{spanner}. @var{dir} is @code{-1} "
89 "for left, and @code{1} for right.")
91 Spanner *sl = dynamic_cast<Spanner *> (unsmob_grob (slur));
92 SCM_ASSERT_TYPE (sl, slur, SCM_ARG1, __FUNCTION__, "spanner grob");
93 SCM_ASSERT_TYPE (is_direction (dir), slur, SCM_ARG2, __FUNCTION__, "dir");
94 return sl->get_bound (to_dir (dir))->self_scm ();
97 /* TODO: make difference between scaled and unscalead variable in
98 calling (i.e different funcs.) */
99 LY_DEFINE (ly_grob_layout, "ly:grob-layout",
101 "Get @code{\\layout} definition from grob @var{g}.")
103 Grob *sc = unsmob_grob (g);
104 SCM_ASSERT_TYPE (sc, g, SCM_ARG1, __FUNCTION__, "grob");
106 return sc->get_layout ()->self_scm ();
109 LY_DEFINE (ly_grob_alist_chain, "ly:grob-alist-chain",
110 1, 1, 0, (SCM grob, SCM global),
111 "Get an alist chain for grob @var{grob}, with @var{global} as the "
112 "global default. If unspecified, @code{font-defaults} "
113 "from the layout block is taken. ")
115 Grob *sc = unsmob_grob (grob);
116 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
118 if (global == SCM_UNDEFINED)
120 global = sc->get_layout ()->lookup_variable (ly_symbol2scm ("font-defaults"));
121 if (global == SCM_UNDEFINED)
125 return sc->get_property_alist_chain (global);
128 LY_DEFINE (ly_get_extent, "ly:grob-extent",
129 3, 0, 0, (SCM grob, SCM refp, SCM axis),
130 "Get the extent in @var{axis} direction of @var{grob} relative to "
131 "the grob @var{refp}")
133 Grob *sc = unsmob_grob (grob);
134 Grob *ref = unsmob_grob (refp);
135 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
136 SCM_ASSERT_TYPE (ref, refp, SCM_ARG2, __FUNCTION__, "grob");
137 SCM_ASSERT_TYPE (is_axis (axis), axis, SCM_ARG3, __FUNCTION__, "axis");
139 return ly_interval2scm (sc->extent (ref, Axis (scm_to_int (axis))));
142 LY_DEFINE (ly_grob_parent, "ly:grob-parent",
143 2, 0, 0, (SCM grob, SCM axis),
144 "Get the parent of @var{grob}. @var{axis} is 0 for the X-axis, "
147 Grob *sc = unsmob_grob (grob);
148 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
149 SCM_ASSERT_TYPE (is_axis (axis), axis, SCM_ARG2, __FUNCTION__, "axis");
151 Grob *par = sc->get_parent (Axis (scm_to_int (axis)));
152 return par ? par->self_scm () : SCM_EOL;
155 LY_DEFINE (ly_grob_properties, "ly:grob-properties",
157 "Get the mutable proprerties of @var{grob}.")
159 Grob *g = unsmob_grob (grob);
160 SCM_ASSERT_TYPE (g, grob, SCM_ARG1, __FUNCTION__, "grob");
162 /* FIXME: uhg? copy/read only? */
163 return g->mutable_property_alist_;
166 LY_DEFINE (ly_grob_basic_properties, "ly:grob-basic-properties",
168 "Get the immutable properties of @var{grob}.")
170 Grob *g = unsmob_grob (grob);
171 SCM_ASSERT_TYPE (g, grob, SCM_ARG1, __FUNCTION__, "grob");
173 /* FIXME: uhg? copy/read only? */
174 return g->immutable_property_alist_;
177 LY_DEFINE (ly_grob_system, "ly:grob-system",
179 "Return the System Grob of @var{g}.")
181 Grob *me = unsmob_grob (g);
182 SCM_ASSERT_TYPE (me, g, SCM_ARG1, __FUNCTION__, "grob");
184 if (System *g = me->get_system ())
185 return g->self_scm ();
190 LY_DEFINE (ly_grob_original, "ly:grob-original",
192 "Return the unbroken original Grob of @var{grob}.")
194 Grob *me = unsmob_grob (grob);
195 SCM_ASSERT_TYPE (me, grob, SCM_ARG1, __FUNCTION__, "grob");
196 return me->original_ ? me->original_->self_scm () : me->self_scm ();
199 /* TODO: maybe we should return a vector -- random access is more
200 logical for this list? */
201 LY_DEFINE (ly_spanner_broken_into, "ly:spanner-broken-into",
202 1, 0, 0, (SCM spanner),
203 "Return broken-into list for @var{spanner}.")
205 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (spanner));
206 SCM_ASSERT_TYPE (me, spanner, SCM_ARG1, __FUNCTION__, "spanner");
209 for (int i = me->broken_intos_.size (); i--;)
210 s = scm_cons (me->broken_intos_[i]->self_scm (), s);
214 LY_DEFINE (ly_grob_suicide_x, "ly:grob-suicide!",
218 Grob *me = unsmob_grob (g);
219 SCM_ASSERT_TYPE (me, g, SCM_ARG1, __FUNCTION__, "grob");
222 return SCM_UNSPECIFIED;
225 LY_DEFINE (ly_grob_translate_axis_x, "ly:grob-translate-axis!",
226 3, 0, 0, (SCM g, SCM d, SCM a),
227 "Translate @var{g} on axis @var{a} over distance @var{d}.")
229 Grob *me = unsmob_grob (g);
230 SCM_ASSERT_TYPE (me, g, SCM_ARG1, __FUNCTION__, "grob");
231 SCM_ASSERT_TYPE (scm_is_number (d), d, SCM_ARG2, __FUNCTION__, "dimension");
232 SCM_ASSERT_TYPE (is_axis (a), a, SCM_ARG3, __FUNCTION__, "axis");
234 me->translate_axis (scm_to_double (d), Axis (scm_to_int (a)));
235 return SCM_UNSPECIFIED;
238 LY_DEFINE (ly_spanner_p, "ly:spanner?",
240 "Is @var{g} a spanner object?")
242 Grob *me = unsmob_grob (g);
243 bool b = dynamic_cast<Spanner *> (me);
245 return ly_bool2scm (b);
248 LY_DEFINE (ly_grob_key, "ly:grob-key",
251 "Return the object-key for @var{grob}.")
253 Grob *me = unsmob_grob (grob);
254 SCM_ASSERT_TYPE (me, grob, SCM_ARG1, __FUNCTION__, "Grob");
255 return me->get_key ()->self_scm ();
258 LY_DEFINE (ly_grob_default_font, "ly:grob-default-font",
260 "Return the default font for grob @var{gr}.")
262 Grob *gr = unsmob_grob (grob);
263 SCM_ASSERT_TYPE (gr, grob, SCM_ARG1, __FUNCTION__, "grob");
265 return Font_interface::get_default_font (gr)->self_scm ();