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 (val), val, SCM_ARG3, __FUNCTION__, "procedure");
28 sc->set_callback (sym, val);
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);
61 LY_DEFINE (ly_grob_object, "ly:grob-object",
62 2, 0, 0, (SCM grob, SCM sym),
63 "Return the value of a pointer in grob @var{g} of property @var{sym}. "
64 "It will return @code{' ()} (end-of-list) "
65 "if @var{sym} is undefined in @var{g}."
68 Grob *sc = unsmob_grob (grob);
69 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
70 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
72 return sc->internal_get_object (sym);
75 LY_DEFINE (ly_spanner_get_bound, "ly:spanner-get-bound",
76 2, 0, 0, (SCM slur, SCM dir),
77 "Get one of the bounds of @var{spanner}. @var{dir} is @code{-1} "
78 "for left, and @code{1} for right.")
80 Spanner *sl = dynamic_cast<Spanner *> (unsmob_grob (slur));
81 SCM_ASSERT_TYPE (sl, slur, SCM_ARG1, __FUNCTION__, "spanner grob");
82 SCM_ASSERT_TYPE (is_direction (dir), slur, SCM_ARG2, __FUNCTION__, "dir");
83 return sl->get_bound (to_dir (dir))->self_scm ();
86 /* TODO: make difference between scaled and unscalead variable in
87 calling (i.e different funcs.) */
88 LY_DEFINE (ly_grob_layout, "ly:grob-layout",
90 "Get @code{\\layout} definition from grob @var{g}.")
92 Grob *sc = unsmob_grob (g);
93 SCM_ASSERT_TYPE (sc, g, SCM_ARG1, __FUNCTION__, "grob");
95 return sc->get_layout ()->self_scm ();
98 LY_DEFINE (ly_grob_alist_chain, "ly:grob-alist-chain",
99 1, 1, 0, (SCM grob, SCM global),
100 "Get an alist chain for grob @var{grob}, with @var{global} as the "
101 "global default. If unspecified, @code{font-defaults} "
102 "from the layout block is taken. ")
104 Grob *sc = unsmob_grob (grob);
105 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
107 if (global == SCM_UNDEFINED)
109 global = sc->get_layout ()->lookup_variable (ly_symbol2scm ("font-defaults"));
110 if (global == SCM_UNDEFINED)
114 return sc->get_property_alist_chain (global);
117 LY_DEFINE (ly_get_extent, "ly:grob-extent",
118 3, 0, 0, (SCM grob, SCM refp, SCM axis),
119 "Get the extent in @var{axis} direction of @var{grob} relative to "
120 "the grob @var{refp}")
122 Grob *sc = unsmob_grob (grob);
123 Grob *ref = unsmob_grob (refp);
124 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
125 SCM_ASSERT_TYPE (ref, refp, SCM_ARG2, __FUNCTION__, "grob");
126 SCM_ASSERT_TYPE (is_axis (axis), axis, SCM_ARG3, __FUNCTION__, "axis");
128 return ly_interval2scm (sc->extent (ref, Axis (scm_to_int (axis))));
131 LY_DEFINE (ly_grob_parent, "ly:grob-parent",
132 2, 0, 0, (SCM grob, SCM axis),
133 "Get the parent of @var{grob}. @var{axis} is 0 for the X-axis, "
136 Grob *sc = unsmob_grob (grob);
137 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
138 SCM_ASSERT_TYPE (is_axis (axis), axis, SCM_ARG2, __FUNCTION__, "axis");
140 Grob *par = sc->get_parent (Axis (scm_to_int (axis)));
141 return par ? par->self_scm () : SCM_EOL;
144 LY_DEFINE (ly_grob_properties, "ly:grob-properties",
146 "Get the mutable proprerties of @var{grob}.")
148 Grob *g = unsmob_grob (grob);
149 SCM_ASSERT_TYPE (g, grob, SCM_ARG1, __FUNCTION__, "grob");
151 /* FIXME: uhg? copy/read only? */
152 return g->mutable_property_alist_;
155 LY_DEFINE (ly_grob_basic_properties, "ly:grob-basic-properties",
157 "Get the immutable properties 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->immutable_property_alist_;
166 LY_DEFINE (ly_grob_system, "ly:grob-system",
168 "Return the System Grob of @var{g}.")
170 Grob *me = unsmob_grob (g);
171 SCM_ASSERT_TYPE (me, g, SCM_ARG1, __FUNCTION__, "grob");
173 if (System *g = me->get_system ())
174 return g->self_scm ();
179 LY_DEFINE (ly_grob_original, "ly:grob-original",
181 "Return the unbroken original Grob of @var{grob}.")
183 Grob *me = unsmob_grob (grob);
184 SCM_ASSERT_TYPE (me, grob, SCM_ARG1, __FUNCTION__, "grob");
185 return me->original_ ? me->original_->self_scm () : me->self_scm ();
188 /* TODO: maybe we should return a vector -- random access is more
189 logical for this list? */
190 LY_DEFINE (ly_spanner_broken_into, "ly:spanner-broken-into",
191 1, 0, 0, (SCM spanner),
192 "Return broken-into list for @var{spanner}.")
194 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (spanner));
195 SCM_ASSERT_TYPE (me, spanner, SCM_ARG1, __FUNCTION__, "spanner");
198 for (int i = me->broken_intos_.size (); i--;)
199 s = scm_cons (me->broken_intos_[i]->self_scm (), s);
203 LY_DEFINE (ly_grob_suicide_x, "ly:grob-suicide!",
207 Grob *me = unsmob_grob (g);
208 SCM_ASSERT_TYPE (me, g, SCM_ARG1, __FUNCTION__, "grob");
211 return SCM_UNSPECIFIED;
214 LY_DEFINE (ly_grob_translate_axis_x, "ly:grob-translate-axis!",
215 3, 0, 0, (SCM g, SCM d, SCM a),
216 "Translate @var{g} on axis @var{a} over distance @var{d}.")
218 Grob *me = unsmob_grob (g);
219 SCM_ASSERT_TYPE (me, g, SCM_ARG1, __FUNCTION__, "grob");
220 SCM_ASSERT_TYPE (scm_is_number (d), d, SCM_ARG2, __FUNCTION__, "dimension");
221 SCM_ASSERT_TYPE (is_axis (a), a, SCM_ARG3, __FUNCTION__, "axis");
223 me->translate_axis (scm_to_double (d), Axis (scm_to_int (a)));
224 return SCM_UNSPECIFIED;
227 LY_DEFINE (ly_spanner_p, "ly:spanner?",
229 "Is @var{g} a spanner object?")
231 Grob *me = unsmob_grob (g);
232 bool b = dynamic_cast<Spanner *> (me);
234 return ly_bool2scm (b);
237 LY_DEFINE (ly_grob_key, "ly:grob-key",
240 "Return the object-key for @var{grob}.")
242 Grob *me = unsmob_grob (grob);
243 SCM_ASSERT_TYPE (me, grob, SCM_ARG1, __FUNCTION__, "Grob");
244 return me->get_key ()->self_scm ();
247 LY_DEFINE (ly_grob_default_font, "ly:grob-default-font",
249 "Return the default font for grob @var{gr}.")
251 Grob *gr = unsmob_grob (grob);
252 SCM_ASSERT_TYPE (gr, grob, SCM_ARG1, __FUNCTION__, "grob");
254 return Font_interface::get_default_font (gr)->self_scm ();