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>
9 #include "staff-symbol-referencer.hh"
11 #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);
39 Real padding = scm_to_double (me->get_property ("bound-padding"));
41 Drul_array<bool> broken;
42 Drul_array<Item*> bounds ;
46 bounds[d] = spanner->get_bound (d);
47 broken[d] = bounds[d]->break_status_dir () != CENTER;
49 while (flip (&d) != LEFT);
51 Grob *common = bounds[LEFT]->common_refpoint (bounds[RIGHT], X_AXIS);
52 Drul_array<Real> x_points ;
57 x_points[d] = b->relative_coordinate (common, X_AXIS);
61 x_points[d] = b->extent (common,X_AXIS)[RIGHT] ;
65 if (Text_interface::has_interface (b))
67 Interval e = b->extent (common, X_AXIS);
69 x_points[d] = e[-d] - d*padding;
73 bool neighbor_found = false;
74 for (SCM adj = me->get_property ("adjacent-hairpins");
75 scm_is_pair (adj); adj = scm_cdr (adj))
78 FIXME: this will fuck up in case of polyphonic
79 notes in other voices. Need to look at note-columns
80 in the current staff/voice.
83 Spanner *pin = unsmob_spanner (scm_car (adj));
85 && (pin->get_bound (LEFT)->get_column() == b
86 || pin->get_bound (RIGHT)->get_column() == b))
87 neighbor_found = true;
91 If we're hung on a paper column, that means we're not
92 adjacent to a text-dynamic, and we may move closer. We
93 make the padding a little smaller, here.
95 Interval e = robust_relative_extent (b, common, X_AXIS);
97 neighbor_found ? e.center() - d * padding / 3 : e[d];
102 while (flip (&d) != LEFT);
105 Real width = x_points[RIGHT] - x_points[LEFT];
109 me->warning (_ ((grow_dir < 0) ? "decrescendo too small"
110 : "crescendo too small"));
114 bool continued = broken[Direction (-grow_dir)];
115 Real height = robust_scm2double (me->get_property ("height"), 0.2) *
116 Staff_symbol_referencer::staff_space (me);
122 endh = continued ? height/2 : 0.0;
126 starth = continued ? height/2 : 0.0;
131 should do relative to staff-symbol staff-space?
135 mol = Line_interface::line (me, Offset (0, starth), Offset (width, endh));
136 mol.add_stencil (Line_interface::line (me,
138 Offset (width, -endh)));
140 mol.translate_axis (x_points[LEFT]
141 - bounds[LEFT]->relative_coordinate (common, X_AXIS),
143 return mol.smobbed_copy ();
148 ADD_INTERFACE (Hairpin, "hairpin-interface",
149 "A hairpin (de)crescendo.",
150 "grow-direction height bound-padding adjacent-hairpins");