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>
13 #include "new-slur.hh"
15 #include "font-interface.hh"
16 #include "text-item.hh"
17 #include "directional-element-interface.hh"
18 #include "group-interface.hh"
19 #include "lily-guile.hh"
21 #include "note-column.hh"
22 #include "output-def.hh"
24 #include "slur-bezier-bow.hh"
27 #include "staff-symbol-referencer.hh"
28 #include "staff-symbol.hh"
34 MAKE_SCHEME_CALLBACK (New_slur, height, 2);
36 New_slur::height (SCM smob, SCM ax)
38 Axis a = (Axis)ly_scm2int (ax);
39 Grob *me = unsmob_grob (smob);
42 SCM mol = me->get_uncached_stencil ();
44 if (Stencil *m = unsmob_stencil (mol))
46 return ly_interval2scm (ext);
50 Ugh should have dash-length + dash-period
52 MAKE_SCHEME_CALLBACK (New_slur, print,1);
54 New_slur::print (SCM smob)
56 Grob *me = unsmob_grob (smob);
57 if (!scm_ilength (me->get_property ("note-columns")))
63 Real base_thick = robust_scm2double (me->get_property ("thickness"), 1);
64 Real thick = base_thick * Staff_symbol_referencer::line_thickness (me);
66 Real ss = Staff_symbol_referencer::staff_space (me);
67 Bezier one = get_curve (me);
72 TODO: replace dashed with generic property.
74 SCM d = me->get_property ("dashed");
75 if (ly_c_number_p (d))
76 a = Lookup::dashed_slur (one, thick, thick * robust_scm2double (d, 0));
78 a = Lookup::slur (one, get_grob_direction (me) * base_thick * ss / 10.0,
81 #if DEBUG_SLUR_QUANTING
82 SCM quant_score = me->get_property ("quant-score");
84 if (to_boolean (me->get_paper ()
85 ->lookup_variable (ly_symbol2scm ("debug-slur-quanting")))
86 && ly_c_string_p (quant_score))
89 SCM properties = Font_interface::text_font_alist_chain (me);
91 Stencil tm = *unsmob_stencil (Text_item::interpret_markup
92 (me->get_paper ()->self_scm (), properties,
94 a.add_at_edge (Y_AXIS, get_grob_direction (me), tm, 1.0, 0);
98 return a.smobbed_copy ();
103 New_slur::get_curve (Grob*me)
107 for (SCM s = me->get_property ("control-points"); s != SCM_EOL;
109 b.control_[i++] = ly_scm2offset (ly_car (s));
115 New_slur::add_column (Grob*me, Grob*n)
117 Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-columns"), n);
118 add_bound_item (dynamic_cast<Spanner*> (me), dynamic_cast<Item*> (n));
123 New_slur::add_extra_encompass (Grob*me, Grob*n)
125 Pointer_group_interface::add_grob (me, ly_symbol2scm ("encompass-objects"), n);
130 MAKE_SCHEME_CALLBACK (New_slur, outside_slur_callback, 2);
132 New_slur::outside_slur_callback (SCM grob, SCM axis)
134 Grob *script = unsmob_grob (grob);
135 Axis a = Axis (ly_scm2int (axis));
136 assert (a == Y_AXIS);
138 Grob *slur = unsmob_grob (script->get_property ("slur"));
141 return scm_from_int (0);
143 Grob *cx = script->common_refpoint (slur, X_AXIS);
144 Grob *cy = script->common_refpoint (slur, Y_AXIS);
146 Bezier curve = New_slur::get_curve (slur);
148 curve.translate (Offset (slur->relative_coordinate (cx, X_AXIS),
149 slur->relative_coordinate (cy, Y_AXIS)));
151 Interval yext = robust_relative_extent (script, cy, Y_AXIS);
152 Interval xext = robust_relative_extent (script, cx, X_AXIS);
155 Real slur_padding = 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 (xext[RIGHT]))
164 else if (!bezext.contains (xext[LEFT]))
168 if (!bezext.contains (x))
169 return scm_make_real (0);
171 Real y = curve.get_other_coordinate (X_AXIS, x);
172 if (yext.contains (y))
174 Direction dir = get_grob_direction (script);
175 return scm_make_real (y - yext[-dir] + dir * slur_padding);
177 return scm_make_real (0.0);
181 ADD_INTERFACE (New_slur, "new-slur-interface",
183 "excentricity encompass-objects control-points dashed details direction height-limit note-columns ratio thickness");