2 hairpin.cc -- implement Hairpin
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@xs4all.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"
21 #include "pointer-group-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_is_equal (bounds[RIGHT]->get_column ()->get_property ("when"),
41 bounds[LEFT]->get_property ("when")))
43 return SCM_UNSPECIFIED;
46 MAKE_SCHEME_CALLBACK (Hairpin, print, 1);
49 Hairpin::print (SCM smob)
51 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
53 SCM s = me->get_property ("grow-direction");
54 if (!is_direction (s))
60 Direction grow_dir = to_dir (s);
61 Real padding = robust_scm2double (me->get_property ("bound-padding"), 0.5);
63 Drul_array<bool> broken;
64 Drul_array<Item *> bounds;
68 bounds[d] = me->get_bound (d);
69 broken[d] = bounds[d]->break_status_dir () != CENTER;
71 while (flip (&d) != LEFT);
73 Grob *common = bounds[LEFT]->common_refpoint (bounds[RIGHT], X_AXIS);
74 Drul_array<Real> x_points;
79 x_points[d] = b->relative_coordinate (common, X_AXIS);
83 x_points[d] = b->extent (common, X_AXIS)[RIGHT];
87 if (Text_interface::has_interface (b))
89 Interval e = b->extent (common, X_AXIS);
91 x_points[d] = e[-d] - d * padding;
95 bool neighbor_found = false;
96 extract_grob_set (me, "adjacent-hairpins", pins);
97 for (int i = 0; i < pins.size (); i++)
100 FIXME: this will fuck up in case of polyphonic
101 notes in other voices. Need to look at note-columns
102 in the current staff/voice.
105 Spanner *pin = dynamic_cast<Spanner *> (pins[i]);
107 && (pin->get_bound (LEFT)->get_column () == b->get_column ()
108 || pin->get_bound (RIGHT)->get_column () == b->get_column ()))
109 neighbor_found = true;
113 If we're hung on a paper column, that means we're not
114 adjacent to a text-dynamic, and we may move closer. We
115 make the padding a little smaller, here.
117 Interval e = robust_relative_extent (b, common, X_AXIS);
119 = neighbor_found ? e.center () - d * padding / 3 : e[d];
123 while (flip (&d) != LEFT);
125 Real width = x_points[RIGHT] - x_points[LEFT];
128 me->warning (_ ((grow_dir < 0) ? "decrescendo too small"
129 : "crescendo too small"));
133 bool continued = broken[Direction (-grow_dir)];
134 Real height = robust_scm2double (me->get_property ("height"), 0.2) *
135 Staff_symbol_referencer::staff_space (me);
141 endh = continued ? height / 2 : 0.0;
145 starth = continued ? height / 2 : 0.0;
150 should do relative to staff-symbol staff-space?
154 mol = Line_interface::line (me, Offset (0, starth), Offset (width, endh));
155 mol.add_stencil (Line_interface::line (me,
157 Offset (width, -endh)));
159 mol.translate_axis (x_points[LEFT]
160 - bounds[LEFT]->relative_coordinate (common, X_AXIS),
162 return mol.smobbed_copy ();
165 ADD_INTERFACE (Hairpin, "hairpin-interface",
166 "A hairpin crescendo/decrescendo.",