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"
20 LY_DEFINE (ly_grob_property_data, "ly:grob-property-data",
21 2, 0, 0, (SCM grob, SCM sym),
23 "Retrieve @var{sym} for @var{grob} but don't process callbacks.")
25 Grob *sc = unsmob_grob (grob);
26 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
27 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
28 // SCM_ASSERT_TYPE (ly_is_procedure (proc), proc, SCM_ARG3, __FUNCTION__, "procedure");
30 return sc->get_property_data (sym);
33 LY_DEFINE (ly_grob_set_property_x, "ly:grob-set-property!",
34 3, 0, 0, (SCM grob, SCM sym, SCM val),
35 "Set @var{sym} in grob @var{grob} to value @var{val}")
37 Grob *sc = unsmob_grob (grob);
38 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
39 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
41 if (!type_check_assignment (sym, val, ly_symbol2scm ("backend-type?")))
42 error ("typecheck failed");
44 sc->internal_set_property (sym, val);
45 return SCM_UNSPECIFIED;
48 LY_DEFINE (ly_grob_property, "ly:grob-property",
49 2, 0, 0, (SCM grob, SCM sym),
50 "Return the value of a value in grob @var{g} of property @var{sym}. "
51 "It will return @code{' ()} (end-of-list) "
52 "if @var{sym} is undefined in @var{g}."
55 Grob *sc = unsmob_grob (grob);
56 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
57 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
59 return sc->internal_get_property (sym);
63 LY_DEFINE (ly_grob_interfaces, "ly:grob-interfaces",
65 "Return the interfaces list of grob @var{grob}.")
67 Grob *sc = unsmob_grob (grob);
68 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
70 return sc->get_interfaces ();
73 LY_DEFINE (ly_grob_object, "ly:grob-object",
74 2, 0, 0, (SCM grob, SCM sym),
75 "Return the value of a pointer in grob @var{g} of property @var{sym}. "
76 "It will return @code{' ()} (end-of-list) "
77 "if @var{sym} is undefined in @var{g}."
80 Grob *sc = unsmob_grob (grob);
81 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
82 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
84 return sc->internal_get_object (sym);
87 LY_DEFINE (ly_spanner_get_bound, "ly:spanner-get-bound",
88 2, 0, 0, (SCM slur, SCM dir),
89 "Get one of the bounds of @var{spanner}. @var{dir} is @code{-1} "
90 "for left, and @code{1} for right.")
92 Spanner *sl = dynamic_cast<Spanner *> (unsmob_grob (slur));
93 SCM_ASSERT_TYPE (sl, slur, SCM_ARG1, __FUNCTION__, "spanner grob");
94 SCM_ASSERT_TYPE (is_direction (dir), slur, SCM_ARG2, __FUNCTION__, "dir");
95 return sl->get_bound (to_dir (dir))->self_scm ();
98 /* TODO: make difference between scaled and unscalead variable in
99 calling (i.e different funcs.) */
100 LY_DEFINE (ly_grob_layout, "ly:grob-layout",
102 "Get @code{\\layout} definition from grob @var{g}.")
104 Grob *sc = unsmob_grob (g);
105 SCM_ASSERT_TYPE (sc, g, SCM_ARG1, __FUNCTION__, "grob");
107 return sc->get_layout ()->self_scm ();
110 LY_DEFINE (ly_grob_alist_chain, "ly:grob-alist-chain",
111 1, 1, 0, (SCM grob, SCM global),
112 "Get an alist chain for grob @var{grob}, with @var{global} as the "
113 "global default. If unspecified, @code{font-defaults} "
114 "from the layout block is taken. ")
116 Grob *sc = unsmob_grob (grob);
117 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
119 if (global == SCM_UNDEFINED)
121 global = sc->get_layout ()->lookup_variable (ly_symbol2scm ("font-defaults"));
122 if (global == SCM_UNDEFINED)
126 return sc->get_property_alist_chain (global);
129 LY_DEFINE (ly_get_extent, "ly:grob-extent",
130 3, 0, 0, (SCM grob, SCM refp, SCM axis),
131 "Get the extent in @var{axis} direction of @var{grob} relative to "
132 "the grob @var{refp}")
134 Grob *sc = unsmob_grob (grob);
135 Grob *ref = unsmob_grob (refp);
136 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
137 SCM_ASSERT_TYPE (ref, refp, SCM_ARG2, __FUNCTION__, "grob");
138 SCM_ASSERT_TYPE (is_axis (axis), axis, SCM_ARG3, __FUNCTION__, "axis");
140 return ly_interval2scm (sc->extent (ref, Axis (scm_to_int (axis))));
143 LY_DEFINE (ly_grob_parent, "ly:grob-parent",
144 2, 0, 0, (SCM grob, SCM axis),
145 "Get the parent of @var{grob}. @var{axis} is 0 for the X-axis, "
148 Grob *sc = unsmob_grob (grob);
149 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
150 SCM_ASSERT_TYPE (is_axis (axis), axis, SCM_ARG2, __FUNCTION__, "axis");
152 Grob *par = sc->get_parent (Axis (scm_to_int (axis)));
153 return par ? par->self_scm () : SCM_EOL;
156 LY_DEFINE (ly_grob_properties, "ly:grob-properties",
158 "Get the mutable proprerties of @var{grob}.")
160 Grob *g = unsmob_grob (grob);
161 SCM_ASSERT_TYPE (g, grob, SCM_ARG1, __FUNCTION__, "grob");
163 /* FIXME: uhg? copy/read only? */
164 return g->mutable_property_alist_;
167 LY_DEFINE (ly_grob_basic_properties, "ly:grob-basic-properties",
169 "Get the immutable properties of @var{grob}.")
171 Grob *g = unsmob_grob (grob);
172 SCM_ASSERT_TYPE (g, grob, SCM_ARG1, __FUNCTION__, "grob");
174 /* FIXME: uhg? copy/read only? */
175 return g->immutable_property_alist_;
178 LY_DEFINE (ly_grob_system, "ly:grob-system",
180 "Return the System Grob of @var{g}.")
182 Grob *me = unsmob_grob (g);
183 SCM_ASSERT_TYPE (me, g, SCM_ARG1, __FUNCTION__, "grob");
185 if (System *g = me->get_system ())
186 return g->self_scm ();
191 LY_DEFINE (ly_grob_original, "ly:grob-original",
193 "Return the unbroken original Grob of @var{grob}.")
195 Grob *me = unsmob_grob (grob);
196 SCM_ASSERT_TYPE (me, grob, SCM_ARG1, __FUNCTION__, "grob");
197 return me->original_ ? me->original_->self_scm () : me->self_scm ();
200 /* TODO: maybe we should return a vector -- random access is more
201 logical for this list? */
202 LY_DEFINE (ly_spanner_broken_into, "ly:spanner-broken-into",
203 1, 0, 0, (SCM spanner),
204 "Return broken-into list for @var{spanner}.")
206 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (spanner));
207 SCM_ASSERT_TYPE (me, spanner, SCM_ARG1, __FUNCTION__, "spanner");
210 for (int i = me->broken_intos_.size (); i--;)
211 s = scm_cons (me->broken_intos_[i]->self_scm (), s);
215 LY_DEFINE (ly_grob_suicide_x, "ly:grob-suicide!",
219 Grob *me = unsmob_grob (g);
220 SCM_ASSERT_TYPE (me, g, SCM_ARG1, __FUNCTION__, "grob");
223 return SCM_UNSPECIFIED;
226 LY_DEFINE (ly_grob_translate_axis_x, "ly:grob-translate-axis!",
227 3, 0, 0, (SCM g, SCM d, SCM a),
228 "Translate @var{g} on axis @var{a} over distance @var{d}.")
230 Grob *me = unsmob_grob (g);
231 SCM_ASSERT_TYPE (me, g, SCM_ARG1, __FUNCTION__, "grob");
232 SCM_ASSERT_TYPE (scm_is_number (d), d, SCM_ARG2, __FUNCTION__, "dimension");
233 SCM_ASSERT_TYPE (is_axis (a), a, SCM_ARG3, __FUNCTION__, "axis");
235 me->translate_axis (scm_to_double (d), Axis (scm_to_int (a)));
236 return SCM_UNSPECIFIED;
239 LY_DEFINE (ly_spanner_p, "ly:spanner?",
241 "Is @var{g} a spanner object?")
243 Grob *me = unsmob_grob (g);
244 bool b = dynamic_cast<Spanner *> (me);
246 return ly_bool2scm (b);
249 LY_DEFINE (ly_grob_key, "ly:grob-key",
252 "Return the object-key for @var{grob}.")
254 Grob *me = unsmob_grob (grob);
255 SCM_ASSERT_TYPE (me, grob, SCM_ARG1, __FUNCTION__, "Grob");
256 return me->get_key ()->self_scm ();
259 LY_DEFINE (ly_grob_default_font, "ly:grob-default-font",
261 "Return the default font for grob @var{gr}.")
263 Grob *gr = unsmob_grob (grob);
264 SCM_ASSERT_TYPE (gr, grob, SCM_ARG1, __FUNCTION__, "grob");
266 return Font_interface::get_default_font (gr)->self_scm ();