]> git.donarmstrong.com Git - lilypond.git/blob - lily/figured-bass-continuation.cc
* input/regression/stencil-color-rotation.ly: new file.
[lilypond.git] / lily / figured-bass-continuation.cc
1 /*
2   figured-bass-continuation.cc -- implement Figured_bass_continuation
3
4   source file of the GNU LilyPond music typesetter
5
6   (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
7
8 */
9
10 #include "line-interface.hh"
11 #include "lily-guile.hh"
12 #include "spanner.hh"
13 #include "output-def.hh"
14 #include "item.hh"
15 #include "stencil.hh"
16 #include "pointer-group-interface.hh"
17 #include "axis-group-interface.hh"
18
19
20 #include "horizontal-bracket.hh"
21
22 struct Figured_bass_continuation
23 {
24   static bool has_interface (Grob*);
25   
26 public:
27   DECLARE_SCHEME_CALLBACK(print, (SCM));
28   DECLARE_SCHEME_CALLBACK(center_on_figures, (SCM));
29 };
30
31 MAKE_SCHEME_CALLBACK (Figured_bass_continuation, center_on_figures, 1);
32 SCM
33 Figured_bass_continuation::center_on_figures (SCM grob)
34 {
35   Spanner *me = dynamic_cast<Spanner*> (unsmob_grob (grob));
36   extract_grob_set (me, "figures", figures);
37   if (figures.empty ())
38     return scm_from_double (0.0);
39   Grob *common = common_refpoint_of_array (figures, me, Y_AXIS);
40
41   Interval ext = Axis_group_interface::relative_group_extent (figures, common, Y_AXIS);
42   if (ext.is_empty ())
43     return scm_from_double (0.0);
44   return scm_from_double (ext.center () - me->relative_coordinate (common, Y_AXIS));
45 }
46
47 MAKE_SCHEME_CALLBACK (Figured_bass_continuation, print, 1);
48 SCM
49 Figured_bass_continuation::print (SCM grob)
50 {
51   Spanner *me = dynamic_cast<Spanner*> (unsmob_grob (grob));
52
53   Real thick =
54     me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"))
55     * robust_scm2double (me->get_property ("thickness"), 1);
56   
57   Interval spanned;
58   Direction d = LEFT;
59   Grob *common = me->get_bound (LEFT)->common_refpoint (me->get_bound (RIGHT),
60                                                         X_AXIS);
61   do
62     {
63       Item *bound = me->get_bound (d);
64       Direction extdir =
65         (d == LEFT && to_boolean (bound->get_property ("implicit")))
66         ? LEFT : RIGHT;
67
68       spanned[d] 
69         = robust_relative_extent (bound, common, X_AXIS)[extdir]
70         - me->relative_coordinate (common, X_AXIS);
71     }
72   while (flip (&d) !=  LEFT);
73   spanned.widen (- robust_scm2double (me->get_property ("padding"), 0.2));
74   
75   Stencil extender;
76   if (!spanned.is_empty ())
77     extender = Line_interface::make_line (thick,
78                                           Offset (spanned[LEFT], 0),
79                                           Offset (spanned[RIGHT], 0));
80   
81   return extender.smobbed_copy ();
82 }
83
84 ADD_INTERFACE(Figured_bass_continuation,
85               "figured-bass-continuation-interface",
86               "Simple extender line between bounds.",
87               
88               /* props */
89               "thickness "
90               "padding "
91               "figures "
92               );
93