2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
5 Han-Wen Nienhuys <hanwen@xs4all.nl>
7 LilyPond is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 LilyPond is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
21 #include "warn.hh" // error ()
23 #include "output-def.hh"
25 #include "font-interface.hh"
26 #include "paper-score.hh"
27 #include "grob-array.hh"
29 LY_DEFINE (ly_grob_property_data, "ly:grob-property-data",
30 2, 0, 0, (SCM grob, SCM sym),
31 "Return the value for property @var{sym} of @var{grob},"
32 " but do not process callbacks.")
34 Grob *sc = unsmob_grob (grob);
36 LY_ASSERT_SMOB (Grob, grob, 1);
37 LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
39 return sc->get_property_data (sym);
42 LY_DEFINE (ly_grob_set_property_x, "ly:grob-set-property!",
43 3, 0, 0, (SCM grob, SCM sym, SCM val),
44 "Set @var{sym} in grob @var{grob} to value @var{val}.")
46 Grob *sc = unsmob_grob (grob);
48 LY_ASSERT_SMOB (Grob, grob, 1);
49 LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
51 if (!ly_is_procedure (val)
52 && !type_check_assignment (sym, val, ly_symbol2scm ("backend-type?")))
53 error ("typecheck failed");
55 sc->set_property (sym, val);
56 return SCM_UNSPECIFIED;
59 LY_DEFINE (ly_grob_set_nested_property_x, "ly:grob-set-nested-property!",
60 3, 0, 0, (SCM grob, SCM symlist, SCM val),
61 "Set nested property @var{symlist} in grob @var{grob} to value @var{val}.")
63 Grob *sc = unsmob_grob (grob);
65 LY_ASSERT_SMOB (Grob, grob, 1);
67 bool type_ok = ly_cheap_is_list (symlist);
70 for (SCM s = symlist; scm_is_pair (s) && type_ok; s = scm_cdr (s))
71 type_ok &= ly_is_symbol (scm_car (s));
73 SCM_ASSERT_TYPE (type_ok, symlist, SCM_ARG2, __FUNCTION__, "list of symbols");
75 set_nested_property (sc, symlist, val);
76 return SCM_UNSPECIFIED;
80 LY_DEFINE (ly_grob_property, "ly:grob-property",
81 2, 1, 0, (SCM grob, SCM sym, SCM val),
82 "Return the value for property @var{sym} of @var{grob}."
83 " If no value is found, return @var{val} or @code{'()}"
84 " if @var{val} is not specified.")
86 Grob *sc = unsmob_grob (grob);
88 LY_ASSERT_SMOB (Grob, grob, 1);
89 LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
90 if (val == SCM_UNDEFINED)
93 SCM retval = sc->internal_get_property (sym);
94 if (retval == SCM_EOL)
101 LY_DEFINE (ly_grob_interfaces, "ly:grob-interfaces",
103 "Return the interfaces list of grob @var{grob}.")
105 Grob *sc = unsmob_grob (grob);
107 LY_ASSERT_SMOB (Grob, grob, 1);
109 return sc->interfaces ();
112 LY_DEFINE (ly_grob_object, "ly:grob-object",
113 2, 0, 0, (SCM grob, SCM sym),
114 "Return the value of a pointer in grob@tie{}@var{g} of property"
115 " @var{sym}. It returns @code{'()} (end-of-list) if @var{sym}"
116 " is undefined in@tie{}@var{g}.")
118 Grob *sc = unsmob_grob (grob);
120 LY_ASSERT_SMOB (Grob, grob, 1);
121 LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
123 return sc->internal_get_object (sym);
128 /* TODO: make difference between scaled and unscalead variable in
129 calling (i.e different funcs.) */
130 LY_DEFINE (ly_grob_layout, "ly:grob-layout",
132 "Get @code{\\layout} definition from grob @var{grob}.")
134 Grob *sc = unsmob_grob (grob);
136 LY_ASSERT_SMOB (Grob, grob, 1);
138 return sc->layout ()->self_scm ();
141 LY_DEFINE (ly_grob_alist_chain, "ly:grob-alist-chain",
142 1, 1, 0, (SCM grob, SCM global),
143 "Get an alist chain for grob @var{grob}, with @var{global} as"
144 " the global default. If unspecified, @code{font-defaults}"
145 " from the layout block is taken.")
147 Grob *sc = unsmob_grob (grob);
149 LY_ASSERT_SMOB (Grob, grob, 1);
151 if (global == SCM_UNDEFINED)
153 global = sc->layout ()->lookup_variable (ly_symbol2scm ("font-defaults"));
154 if (global == SCM_UNDEFINED)
158 return sc->get_property_alist_chain (global);
161 LY_DEFINE (ly_grob_extent, "ly:grob-extent",
162 3, 0, 0, (SCM grob, SCM refp, SCM axis),
163 "Get the extent in @var{axis} direction of @var{grob} relative to"
164 " the grob @var{refp}.")
166 Grob *sc = unsmob_grob (grob);
167 Grob *ref = unsmob_grob (refp);
170 LY_ASSERT_SMOB (Grob, grob, 1);
171 LY_ASSERT_SMOB (Grob, refp, 2);
172 LY_ASSERT_TYPE (is_axis, axis, 3);
174 Axis a = Axis (scm_to_int (axis));
177 if (ref->common_refpoint (sc, a) != ref)
179 // ugh. should use other error message
180 SCM_ASSERT_TYPE (false, refp, SCM_ARG2, __FUNCTION__, "common refpoint");
182 return ly_interval2scm (sc->extent (ref, a));
185 LY_DEFINE (ly_grob_robust_relative_extent, "ly:grob-robust-relative-extent",
186 3, 0, 0, (SCM grob, SCM refp, SCM axis),
187 "Get the extent in @var{axis} direction of @var{grob} relative to"
188 " the grob @var{refp}, or @code{(0,0)} if empty.")
190 Grob *sc = unsmob_grob (grob);
191 Grob *ref = unsmob_grob (refp);
194 LY_ASSERT_SMOB (Grob, grob, 1);
195 LY_ASSERT_SMOB (Grob, refp, 2);
196 LY_ASSERT_TYPE (is_axis, axis, 3);
198 Axis a = Axis (scm_to_int (axis));
200 if (ref->common_refpoint (sc, a) != ref)
202 // ugh. should use other error message
203 SCM_ASSERT_TYPE (false, refp, SCM_ARG2, __FUNCTION__, "common refpoint");
206 return ly_interval2scm (robust_relative_extent (sc, ref, a));
209 LY_DEFINE (ly_grob_relative_coordinate, "ly:grob-relative-coordinate",
210 3, 0, 0, (SCM grob, SCM refp, SCM axis),
211 "Get the coordinate in @var{axis} direction of @var{grob} relative"
212 " to the grob @var{refp}.")
214 Grob *sc = unsmob_grob (grob);
215 Grob *ref = unsmob_grob (refp);
218 LY_ASSERT_SMOB (Grob, grob, 1);
219 LY_ASSERT_SMOB (Grob, refp, 2);
220 LY_ASSERT_TYPE (is_axis, axis, 3);
222 Axis a = Axis (scm_to_int (axis));
225 if (ref->common_refpoint (sc, a) != ref)
227 // ugh. should use other error message
228 SCM_ASSERT_TYPE (false, refp, SCM_ARG2, __FUNCTION__, "common refpoint");
231 return scm_from_double (sc->relative_coordinate (ref, a));
235 LY_DEFINE (ly_grob_parent, "ly:grob-parent",
236 2, 0, 0, (SCM grob, SCM axis),
237 "Get the parent of @var{grob}. @var{axis} is 0 for the X-axis,"
238 " 1@tie{}for the Y-axis.")
240 Grob *sc = unsmob_grob (grob);
242 LY_ASSERT_SMOB (Grob, grob, 1);
243 LY_ASSERT_TYPE (is_axis, axis, 2);
245 Grob *par = sc->get_parent (Axis (scm_to_int (axis)));
246 return par ? par->self_scm () : SCM_EOL;
249 LY_DEFINE (ly_grob_properties, "ly:grob-properties",
251 "Get the mutable properties of @var{grob}.")
253 Grob *g = unsmob_grob (grob);
255 LY_ASSERT_SMOB (Grob, grob, 1);
257 /* FIXME: uhg? copy/read only? */
258 return g->mutable_property_alist_;
261 LY_DEFINE (ly_grob_basic_properties, "ly:grob-basic-properties",
263 "Get the immutable properties of @var{grob}.")
265 Grob *g = unsmob_grob (grob);
267 LY_ASSERT_SMOB (Grob, grob, 1);
269 /* FIXME: uhg? copy/read only? */
270 return g->immutable_property_alist_;
273 LY_DEFINE (ly_grob_system, "ly:grob-system",
275 "Return the system grob of @var{grob}.")
277 Grob *me = unsmob_grob (grob);
279 LY_ASSERT_SMOB (Grob, grob, 1);
281 if (System *g = me->get_system ())
282 return g->self_scm ();
287 LY_DEFINE (ly_grob_original, "ly:grob-original",
289 "Return the unbroken original grob of @var{grob}.")
291 Grob *me = unsmob_grob (grob);
293 LY_ASSERT_SMOB (Grob, grob, 1);
294 return me->original () ? me->original ()->self_scm () : me->self_scm ();
298 LY_DEFINE (ly_grob_suicide_x, "ly:grob-suicide!",
302 Grob *me = unsmob_grob (grob);
304 LY_ASSERT_SMOB (Grob, grob, 1);
307 return SCM_UNSPECIFIED;
310 LY_DEFINE (ly_grob_translate_axis_x, "ly:grob-translate-axis!",
311 3, 0, 0, (SCM grob, SCM d, SCM a),
312 "Translate @var{g} on axis@tie{}@var{a} over"
313 " distance@tie{}@var{d}.")
315 Grob *me = unsmob_grob (grob);
317 LY_ASSERT_SMOB (Grob, grob, 1);
318 LY_ASSERT_TYPE (scm_is_number, d, 2);
319 LY_ASSERT_TYPE (is_axis, a, 3);
321 me->translate_axis (scm_to_double (d), Axis (scm_to_int (a)));
322 return SCM_UNSPECIFIED;
325 LY_DEFINE (ly_grob_default_font, "ly:grob-default-font",
327 "Return the default font for grob @var{gr}.")
329 Grob *gr = unsmob_grob (grob);
331 LY_ASSERT_SMOB (Grob, grob, 1);
333 return Font_interface::get_default_font (gr)->self_scm ();
338 TODO: consider swapping order, so we can do
340 (grob-common-refpoint a b c d e)
342 LY_DEFINE (ly_grob_common_refpoint, "ly:grob-common-refpoint",
343 3, 0, 0, (SCM grob, SCM other, SCM axis),
344 "Find the common refpoint of @var{grob} and @var{other}"
348 Grob *gr = unsmob_grob (grob);
350 LY_ASSERT_SMOB (Grob, grob, 1);
351 LY_ASSERT_SMOB (Grob, other, 2);
353 Grob *o = unsmob_grob (other);
355 LY_ASSERT_TYPE (is_axis, axis, 3);
357 Grob *refp = gr->common_refpoint (o, Axis (scm_to_int (axis)));
358 return refp ? refp->self_scm () : SCM_BOOL_F;
361 LY_DEFINE (ly_grob_common_refpoint_of_array, "ly:grob-common-refpoint-of-array",
362 3, 0, 0, (SCM grob, SCM others, SCM axis),
363 "Find the common refpoint of @var{grob} and @var{others}"
364 " (a grob-array) for @var{axis}.")
366 Grob *gr = unsmob_grob (grob);
368 LY_ASSERT_SMOB (Grob, grob, 1);
369 LY_ASSERT_SMOB (Grob_array, others, 2);
371 Grob_array *ga = unsmob_grob_array (others);
372 LY_ASSERT_TYPE (is_axis, axis, 3);
374 Grob *refp = common_refpoint_of_array (ga->array (), gr, Axis (scm_to_int (axis)));
375 return refp ? refp->self_scm () : SCM_BOOL_F;