5 #include "paper-def.hh"
9 LY_DEFINE (ly_set_grob_property,"ly:set-grob-property!", 3, 0, 0,
10 (SCM grob, SCM sym, SCM val),
11 "Set @var{sym} in grob @var{grob} to value @var{val}")
13 Grob * sc = unsmob_grob (grob);
14 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
15 SCM_ASSERT_TYPE (gh_symbol_p (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
17 if (!type_check_assignment (sym, val, ly_symbol2scm ("backend-type?")))
18 error ("typecheck failed");
20 sc->internal_set_grob_property (sym, val);
21 return SCM_UNSPECIFIED;
24 LY_DEFINE (ly_get_grob_property,
25 "ly:get-grob-property", 2, 0, 0, (SCM grob, SCM sym),
26 "Get the value of a value in grob @var{g} of property @var{sym}. It
27 will return @code{'()} (end-of-list) if @var{g} doesn't have @var{sym} set.
29 Grob properties are stored as GUILE association lists, with symbols as
30 keys. All lookup functions identify undefined properties with
31 end-of-list (i.e. @code{'()} in Scheme or @code{SCM_EOL} in C)
33 Properties are stored in two ways:
35 @item mutable properties.
36 Grob properties that change from object to object. The storage of
37 these are private to a grob. For example pointers to other grobs are
38 always stored in the mutable properties.
40 @item immutable properties.
41 Grob properties that are shared across different grobs of the same
42 type. The storage is shared, and hence it is read-only. Typically, this
43 is used to store function callbacks, and default settings. They are
44 initially read from @file{scm/grob-description.scm}.
49 Grob * sc = unsmob_grob (grob);
50 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
51 SCM_ASSERT_TYPE (gh_symbol_p (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
53 return sc->internal_get_grob_property (sym);
56 LY_DEFINE (spanner_get_bound, "ly:get-spanner-bound", 2 , 0, 0,
58 "Get one of the bounds of @var{spanner}. @var{dir} is @code{-1} "
59 "for left, and @code{1} for right.")
61 Spanner * sl = dynamic_cast<Spanner*> (unsmob_grob (slur));
62 SCM_ASSERT_TYPE (sl, slur, SCM_ARG1, __FUNCTION__, "spanner grob");
63 SCM_ASSERT_TYPE (ly_dir_p (dir), slur, SCM_ARG2, __FUNCTION__, "dir");
64 return sl->get_bound (to_dir (dir))->self_scm ();
67 /* TODO: make difference between scaled and unscalead variable in
68 calling (i.e different funcs.) */
69 LY_DEFINE (ly_get_paper_var,"ly:get-paper-variable", 2, 0, 0,
71 "Get a variable from the \\paper block.")
73 Grob * sc = unsmob_grob (grob);
74 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
75 SCM_ASSERT_TYPE (gh_symbol_p (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
77 return sc->get_paper () ->lookup_variable (sym);
82 LY_DEFINE (ly_get_extent, "ly:get-extent", 3, 0, 0,
83 (SCM grob, SCM refp, SCM axis),
84 "Get the extent in @var{axis} direction of @var{grob} relative to "
85 "the grob @var{refp}")
87 Grob * sc = unsmob_grob (grob);
88 Grob * ref = unsmob_grob (refp);
89 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
90 SCM_ASSERT_TYPE (ref, refp, SCM_ARG2, __FUNCTION__, "grob");
92 SCM_ASSERT_TYPE (ly_axis_p (axis), axis, SCM_ARG3, __FUNCTION__, "axis");
94 return ly_interval2scm ( sc->extent (ref, Axis (gh_scm2int (axis))));
97 LY_DEFINE (ly_get_parent, "ly:get-parent", 2, 0, 0, (SCM grob, SCM axis),
98 "Get the parent of @var{grob}. @var{axis} is 0 for the X-axis, "
101 Grob * sc = unsmob_grob (grob);
102 SCM_ASSERT_TYPE (sc, grob, SCM_ARG1, __FUNCTION__, "grob");
103 SCM_ASSERT_TYPE (ly_axis_p (axis), axis, SCM_ARG2, __FUNCTION__, "axis");
105 Grob * par = sc->get_parent (Axis (gh_scm2int (axis)));
106 return par ? par->self_scm () : SCM_EOL;
110 LY_DEFINE (get_system,
113 "Return the System Grob of @var{grob}.")
115 Grob *me = unsmob_grob (grob);
116 SCM_ASSERT_TYPE (me, grob, SCM_ARG1, __FUNCTION__, "grob");
118 if (System *g = me->get_system ())
119 return g->self_scm ();
125 LY_DEFINE (get_original,
128 "Return the original Grob of @var{grob}")
130 Grob *me = unsmob_grob (grob);
131 SCM_ASSERT_TYPE (me, grob, SCM_ARG1, __FUNCTION__, "grob");
132 return me->original_ ? me->original_->self_scm () : me->self_scm ();
136 /* ly prefix? spanner in name? */
137 /* TODO: maybe we should return a vector -- random access is more
138 logical for this list? */
140 LY_DEFINE (get_broken_into,
141 "ly:get-broken-into", 1, 0, 0, (SCM spanner),
142 "Return broken-into list for @var{spanner}.")
144 /// Spanner *me = unsmob_spanner (spanner);
145 Spanner *me = dynamic_cast<Spanner*> (unsmob_grob (spanner));
146 SCM_ASSERT_TYPE (me, spanner, SCM_ARG1, __FUNCTION__, "spanner");
149 for (int i = me->broken_intos_.size (); i; i--)
150 s = gh_cons (me->broken_intos_[i-1]->self_scm (), s);