2 hairpin.cc -- implement Hairpin
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "staff-symbol-referencer.hh"
12 #include "line-interface.hh"
14 #include "font-interface.hh"
15 #include "dimensions.hh"
16 #include "output-def.hh"
18 #include "paper-column.hh"
20 #include "text-item.hh"
22 MAKE_SCHEME_CALLBACK (Hairpin, print, 1);
25 Hairpin::print (SCM smob)
27 Grob *me = unsmob_grob (smob);
28 Spanner *spanner = dynamic_cast<Spanner*> (me);
30 SCM s = me->get_property ("grow-direction");
31 if (!is_direction (s))
37 Direction grow_dir = to_dir (s);
38 Real padding = robust_scm2double (me->get_property ("bound-padding"), 0.5);
40 Drul_array<bool> broken;
41 Drul_array<Item*> bounds ;
45 bounds[d] = spanner->get_bound (d);
46 broken[d] = bounds[d]->break_status_dir () != CENTER;
48 while (flip (&d) != LEFT);
50 Grob *common = bounds[LEFT]->common_refpoint (bounds[RIGHT], X_AXIS);
51 Drul_array<Real> x_points ;
56 x_points[d] = b->relative_coordinate (common, X_AXIS);
60 x_points[d] = b->extent (common,X_AXIS)[RIGHT] ;
64 if (Text_interface::has_interface (b))
66 Interval e = b->extent (common, X_AXIS);
68 x_points[d] = e[-d] - d*padding;
72 bool neighbor_found = false;
73 for (SCM adj = me->get_property ("adjacent-hairpins");
74 scm_is_pair (adj); adj = scm_cdr (adj))
77 FIXME: this will fuck up in case of polyphonic
78 notes in other voices. Need to look at note-columns
79 in the current staff/voice.
82 Spanner *pin = unsmob_spanner (scm_car (adj));
84 && (pin->get_bound (LEFT)->get_column() == b->get_column ()
85 || pin->get_bound (RIGHT)->get_column() == b->get_column() ))
86 neighbor_found = true;
90 If we're hung on a paper column, that means we're not
91 adjacent to a text-dynamic, and we may move closer. We
92 make the padding a little smaller, here.
94 Interval e = robust_relative_extent (b, common, X_AXIS);
96 neighbor_found ? e.center() - d * padding / 3 : e[d];
100 while (flip (&d) != LEFT);
103 Real width = x_points[RIGHT] - x_points[LEFT];
106 me->warning (_ ((grow_dir < 0) ? "decrescendo too small"
107 : "crescendo too small"));
111 bool continued = broken[Direction (-grow_dir)];
112 Real height = robust_scm2double (me->get_property ("height"), 0.2) *
113 Staff_symbol_referencer::staff_space (me);
119 endh = continued ? height/2 : 0.0;
123 starth = continued ? height/2 : 0.0;
128 should do relative to staff-symbol staff-space?
132 mol = Line_interface::line (me, Offset (0, starth), Offset (width, endh));
133 mol.add_stencil (Line_interface::line (me,
135 Offset (width, -endh)));
137 mol.translate_axis (x_points[LEFT]
138 - bounds[LEFT]->relative_coordinate (common, X_AXIS),
140 return mol.smobbed_copy ();
145 ADD_INTERFACE (Hairpin, "hairpin-interface",
146 "A hairpin (de)crescendo.",
147 "grow-direction height bound-padding adjacent-hairpins");