2 hairpin.cc -- implement Hairpin
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 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-interface.hh"
23 MAKE_SCHEME_CALLBACK(Hairpin,after_line_breaking,1);
25 Hairpin::after_line_breaking (SCM smob)
27 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
29 Drul_array<bool> broken;
30 Drul_array<Item *> bounds;
34 bounds[d] = me->get_bound (d);
35 broken[d] = bounds[d]->break_status_dir () != CENTER;
37 while (flip (&d) != LEFT);
40 && ly_c_equal_p (bounds[RIGHT]->get_column ()->get_property ("when"),
41 bounds[LEFT]->get_property ("when")))
45 return SCM_UNSPECIFIED;
49 MAKE_SCHEME_CALLBACK (Hairpin, print, 1);
52 Hairpin::print (SCM smob)
54 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
56 SCM s = me->get_property ("grow-direction");
57 if (!is_direction (s))
63 Direction grow_dir = to_dir (s);
64 Real padding = robust_scm2double (me->get_property ("bound-padding"), 0.5);
66 Drul_array<bool> broken;
67 Drul_array<Item *> bounds;
71 bounds[d] = me->get_bound (d);
72 broken[d] = bounds[d]->break_status_dir () != CENTER;
74 while (flip (&d) != LEFT);
76 Grob *common = bounds[LEFT]->common_refpoint (bounds[RIGHT], X_AXIS);
77 Drul_array<Real> x_points;
82 x_points[d] = b->relative_coordinate (common, X_AXIS);
86 x_points[d] = b->extent (common, X_AXIS)[RIGHT];
90 if (Text_interface::has_interface (b))
92 Interval e = b->extent (common, X_AXIS);
94 x_points[d] = e[-d] - d * padding;
98 bool neighbor_found = false;
99 for (SCM adj = me->get_property ("adjacent-hairpins");
100 scm_is_pair (adj); adj = scm_cdr (adj))
103 FIXME: this will fuck up in case of polyphonic
104 notes in other voices. Need to look at note-columns
105 in the current staff/voice.
108 Spanner *pin = unsmob_spanner (scm_car (adj));
110 && (pin->get_bound (LEFT)->get_column () == b->get_column ()
111 || pin->get_bound (RIGHT)->get_column () == b->get_column ()))
112 neighbor_found = true;
116 If we're hung on a paper column, that means we're not
117 adjacent to a text-dynamic, and we may move closer. We
118 make the padding a little smaller, here.
120 Interval e = robust_relative_extent (b, common, X_AXIS);
122 = neighbor_found ? e.center () - d * padding / 3 : e[d];
126 while (flip (&d) != LEFT);
128 Real width = x_points[RIGHT] - x_points[LEFT];
131 me->warning (_ ((grow_dir < 0) ? "decrescendo too small"
132 : "crescendo too small"));
136 bool continued = broken[Direction (-grow_dir)];
137 Real height = robust_scm2double (me->get_property ("height"), 0.2) *
138 Staff_symbol_referencer::staff_space (me);
144 endh = continued ? height / 2 : 0.0;
148 starth = continued ? height / 2 : 0.0;
153 should do relative to staff-symbol staff-space?
157 mol = Line_interface::line (me, Offset (0, starth), Offset (width, endh));
158 mol.add_stencil (Line_interface::line (me,
160 Offset (width, -endh)));
162 mol.translate_axis (x_points[LEFT]
163 - bounds[LEFT]->relative_coordinate (common, X_AXIS),
165 return mol.smobbed_copy ();
168 ADD_INTERFACE (Hairpin, "hairpin-interface",
169 "A hairpin (de)crescendo.",
170 "grow-direction height bound-padding adjacent-hairpins");