2 paper-system-scheme.cc -- implement Prob bindings
4 source file of the GNU LilyPond music typesetter
6 (c) 2005--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
12 LY_DEFINE (ly_prob_set_property_x, "ly:prob-set-property!",
13 2, 1, 0, (SCM obj, SCM sym, SCM value),
14 "Set property @var{sym} of @var{obj} to @var{value}.")
16 LY_ASSERT_SMOB (Prob, obj, 1);
17 Prob *ps = unsmob_prob (obj);
18 LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
20 ps->set_property (sym, value);
21 return SCM_UNSPECIFIED;
25 Hmm, this is not orthogonal.
27 LY_DEFINE (ly_prob_property_p, "ly:prob-property?",
28 2, 1, 0, (SCM obj, SCM sym),
29 "Is boolean prop @var{sym} set?")
31 return scm_equal_p (SCM_BOOL_T, ly_prob_property (obj, sym, SCM_BOOL_F));
34 LY_DEFINE (ly_prob_property, "ly:prob-property",
35 2, 1, 0, (SCM obj, SCM sym, SCM dfault),
36 "Return the value for @var{sym}.")
38 LY_ASSERT_SMOB (Prob, obj, 1);
39 Prob *ps = unsmob_prob (obj);
40 LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
42 if (dfault == SCM_UNDEFINED)
45 SCM retval = ps->internal_get_property (sym);
46 if (retval == SCM_EOL)
52 LY_DEFINE (ly_prob_type_p, "ly:prob-type?",
55 "Is @var{obj} the specified prob-type?")
57 Prob*prob = unsmob_prob (obj);
58 return scm_from_bool (prob && prob->type () == type);
61 LY_DEFINE (ly_make_prob, "ly:make-prob",
63 (SCM type, SCM init, SCM rest),
64 "Create a @code{Prob} object.")
66 Prob *pr = new Prob (type, init);
69 scm_is_pair (s) && scm_is_pair (scm_cdr (s)); s = scm_cddr (s))
71 SCM sym = scm_car (s);
72 SCM val = scm_cadr (s);
74 pr->set_property (sym, val);
77 return pr->unprotect ();
81 LY_DEFINE (ly_paper_system_p, "ly:paper-system?",
85 return ly_prob_type_p (obj, ly_symbol2scm ("paper-system"));
88 LY_DEFINE (ly_paper_system_minimum_distance, "ly:paper-system-minimum-distance",
89 2, 0, 0, (SCM sys1, SCM sys2),
90 "Measure the minimum distance between these two paper-systems,"
91 " using their stored skylines if possible and falling back to"
92 " their extents otherwise.")
95 Prob *p1 = unsmob_prob (sys1);
96 Prob *p2 = unsmob_prob (sys2);
97 Skyline_pair *sky1 = Skyline_pair::unsmob (p1->get_property ("vertical-skylines"));
98 Skyline_pair *sky2 = Skyline_pair::unsmob (p2->get_property ("vertical-skylines"));
101 ret = (*sky1)[DOWN].distance ((*sky2)[UP]);
104 Stencil *s1 = unsmob_stencil (p1->get_property ("stencil"));
105 Stencil *s2 = unsmob_stencil (p2->get_property ("stencil"));
106 Interval iv1 = s1->extent (Y_AXIS);
107 Interval iv2 = s2->extent (Y_AXIS);
108 ret = iv2[UP] - iv1[DOWN];
110 return scm_from_double (ret);