2 slur.cc -- implement external interface for Slur
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
15 #include "directional-element-interface.hh"
16 #include "font-interface.hh"
17 #include "group-interface.hh"
18 #include "lily-guile.hh"
21 #include "note-column.hh"
22 #include "output-def.hh"
26 #include "staff-symbol-referencer.hh"
27 #include "staff-symbol.hh"
30 #include "text-item.hh"
33 MAKE_SCHEME_CALLBACK (Slur, height, 2);
35 Slur::height (SCM smob, SCM ax)
37 Axis a = (Axis)scm_to_int (ax);
38 Grob *me = unsmob_grob (smob);
41 SCM mol = me->get_uncached_stencil ();
43 if (Stencil *m = unsmob_stencil (mol))
45 return ly_interval2scm (ext);
49 Ugh should have dash-length + dash-period
51 MAKE_SCHEME_CALLBACK (Slur, print,1);
53 Slur::print (SCM smob)
55 Grob *me = unsmob_grob (smob);
56 if (!scm_ilength (me->get_property ("note-columns")))
62 Real base_thick = robust_scm2double (me->get_property ("thickness"), 1);
63 Real thick = base_thick * Staff_symbol_referencer::line_thickness (me);
65 Real ss = Staff_symbol_referencer::staff_space (me);
66 Bezier one = get_curve (me);
71 TODO: replace dashed with generic property.
73 SCM d = me->get_property ("dashed");
74 if (scm_is_number (d))
75 a = Lookup::dashed_slur (one, thick, thick * robust_scm2double (d, 0));
77 a = Lookup::slur (one, get_grob_direction (me) * base_thick * ss / 10.0,
80 #if DEBUG_SLUR_QUANTING
81 SCM quant_score = me->get_property ("quant-score");
83 if (to_boolean (me->get_paper ()
84 ->lookup_variable (ly_symbol2scm ("debug-slur-scoring")))
85 && scm_is_string (quant_score))
88 SCM properties = Font_interface::text_font_alist_chain (me);
90 Stencil tm = *unsmob_stencil (Text_interface::interpret_markup
91 (me->get_paper ()->self_scm (), properties,
93 a.add_at_edge (Y_AXIS, get_grob_direction (me), tm, 1.0, 0);
97 return a.smobbed_copy ();
102 Slur::get_curve (Grob*me)
106 for (SCM s = me->get_property ("control-points"); s != SCM_EOL;
108 b.control_[i++] = ly_scm2offset (ly_car (s));
114 Slur::add_column (Grob*me, Grob*n)
116 Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-columns"), n);
117 add_bound_item (dynamic_cast<Spanner*> (me), dynamic_cast<Item*> (n));
122 Slur::add_extra_encompass (Grob*me, Grob*n)
124 Pointer_group_interface::add_grob (me, ly_symbol2scm ("encompass-objects"), n);
129 MAKE_SCHEME_CALLBACK (Slur, outside_slur_callback, 2);
131 Slur::outside_slur_callback (SCM grob, SCM axis)
133 Grob *script = unsmob_grob (grob);
134 Axis a = Axis (scm_to_int (axis));
135 assert (a == Y_AXIS);
137 Grob *slur = unsmob_grob (script->get_property ("slur"));
140 return scm_from_int (0);
142 Grob *cx = script->common_refpoint (slur, X_AXIS);
143 Grob *cy = script->common_refpoint (slur, Y_AXIS);
145 Bezier curve = Slur::get_curve (slur);
147 curve.translate (Offset (slur->relative_coordinate (cx, X_AXIS),
148 slur->relative_coordinate (cy, Y_AXIS)));
150 Interval yext = robust_relative_extent (script, cy, Y_AXIS);
151 Interval xext = robust_relative_extent (script, cx, X_AXIS);
154 Real slur_padding = robust_scm2double (script->get_property ("padding"),
155 0.2); // todo: slur property, script property?
156 yext.widen (slur_padding);
158 Interval bezext (curve.control_[0][X_AXIS],
159 curve.control_[3][X_AXIS]);
161 Real x = xext.center ();
162 if (bezext.contains (x))
164 else if (!bezext.contains (xext[RIGHT]))
166 else if (!bezext.contains (xext[LEFT]))
170 if (!bezext.contains (x))
171 return scm_make_real (0);
172 Real dist = fabs (x - bezext[LEFT]) <? fabs (x - bezext[RIGHT]);
174 Real y = (dist > 1e-3)
175 ? curve.get_other_coordinate (X_AXIS, x)
176 : ((x < bezext.center())
177 ? curve.control_[0][Y_AXIS]
178 : curve.control_[3][Y_AXIS]);
180 if (yext.contains (y))
182 Direction dir = get_grob_direction (script);
183 return scm_make_real (y - yext[-dir] + dir * slur_padding);
185 return scm_make_real (0.0);
189 ADD_INTERFACE (Slur, "slur-interface",
191 "quant-score excentricity encompass-objects control-points dashed slur-details direction height-limit note-columns ratio thickness");