2 slur.cc -- implement external interface for Slur
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
16 #include "directional-element-interface.hh"
17 #include "font-interface.hh"
18 #include "pointer-group-interface.hh"
20 #include "main.hh" // DEBUG_SLUR_SCORING
21 #include "note-column.hh"
22 #include "output-def.hh"
24 #include "staff-symbol-referencer.hh"
25 #include "staff-symbol.hh"
27 #include "text-interface.hh"
29 #include "slur-scoring.hh"
31 MAKE_SCHEME_CALLBACK (Slur, height, 2);
33 Slur::height (SCM smob, SCM ax)
35 Axis a = (Axis)scm_to_int (ax);
36 Grob *me = unsmob_grob (smob);
39 SCM mol = me->get_uncached_stencil ();
41 if (Stencil *m = unsmob_stencil (mol))
43 return ly_interval2scm (ext);
47 Ugh should have dash-length + dash-period
49 MAKE_SCHEME_CALLBACK (Slur, print, 1);
51 Slur::print (SCM smob)
53 Grob *me = unsmob_grob (smob);
54 extract_grob_set (me, "note-columns", encompasses);
55 if (encompasses.is_empty ())
61 Real staff_thick = Staff_symbol_referencer::line_thickness (me);
62 Real base_thick = robust_scm2double (me->get_property ("thickness"), 1);
63 Real thick = base_thick * staff_thick;
64 Bezier one = get_curve (me);
68 TODO: replace dashed with generic property.
70 SCM p = me->get_property ("dash-period");
71 SCM f = me->get_property ("dash-fraction");
72 if (scm_is_number (p) && scm_is_number (f))
73 a = Lookup::dashed_slur (one, thick, robust_scm2double (p, 1.0),
74 robust_scm2double (f, 0));
76 a = Lookup::slur (one,
77 get_grob_direction (me) * staff_thick * 1.0,
80 #if DEBUG_SLUR_SCORING
81 SCM quant_score = me->get_property ("quant-score");
83 if (to_boolean (me->get_layout ()
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_layout ()->self_scm (), properties,
93 a.add_at_edge (Y_AXIS, get_grob_direction (me), tm, 1.0, 0);
97 return a.smobbed_copy ();
101 Slur::get_curve (Grob *me)
105 for (SCM s = me->get_property ("control-points"); s != SCM_EOL;
107 b.control_[i++] = ly_scm2offset (scm_car (s));
113 Slur::add_column (Grob *me, Grob *n)
115 Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-columns"), n);
116 add_bound_item (dynamic_cast<Spanner *> (me), dynamic_cast<Item *> (n));
120 Slur::add_extra_encompass (Grob *me, Grob *n)
122 Pointer_group_interface::add_grob (me, ly_symbol2scm ("encompass-objects"), n);
123 me->add_dependency (n);
126 MAKE_SCHEME_CALLBACK (Slur, outside_slur_callback, 2);
128 Slur::outside_slur_callback (SCM grob, SCM axis)
130 Grob *script = unsmob_grob (grob);
131 Axis a = Axis (scm_to_int (axis));
133 assert (a == Y_AXIS);
135 Grob *slur = unsmob_grob (script->get_object ("slur"));
138 return scm_from_int (0);
140 Grob *cx = script->common_refpoint (slur, X_AXIS);
141 Grob *cy = script->common_refpoint (slur, Y_AXIS);
143 Bezier curve = Slur::get_curve (slur);
145 curve.translate (Offset (slur->relative_coordinate (cx, X_AXIS),
146 slur->relative_coordinate (cy, Y_AXIS)));
148 Interval yext = robust_relative_extent (script, cy, Y_AXIS);
149 Interval xext = robust_relative_extent (script, cx, X_AXIS);
151 Real slur_padding = robust_scm2double (script->get_property ("slur-padding"),
152 0.0); // todo: slur property, script property?
153 yext.widen (slur_padding);
156 Interval bezext (curve.control_[0][X_AXIS],
157 curve.control_[3][X_AXIS]);
159 bool consider[] = { false, false, false };
160 Real ys[] = {0, 0, 0};
162 bool do_shift = false;
164 for (int d = LEFT; d <= RIGHT; d++)
166 Real x = xext.linear_combination ((Direction) d);
167 consider[k] = bezext.contains (x);
172 = (fabs (bezext[LEFT] - x) < EPS)
173 ? curve.control_[0][Y_AXIS]
174 : ((fabs (bezext[RIGHT] - x) < EPS)
175 ? curve.control_[3][Y_AXIS]
176 : curve.get_other_coordinate (X_AXIS, x));
179 if (yext.contains (ys[k]))
187 Direction dir = get_grob_direction (script);
188 for (int d = LEFT; d <= RIGHT; d++)
190 offset = dir * (max (dir * offset,
191 dir * (ys[k] - yext[-dir] + dir * slur_padding)));
196 return scm_make_real (offset);
200 get_default_dir (Grob *me)
202 extract_grob_set (me, "note-columns", encompasses);
205 for (int i = 0; i < encompasses.size (); i++)
207 if (Note_column::dir (encompasses[i]) < 0)
216 MAKE_SCHEME_CALLBACK (Slur, after_line_breaking, 1);
218 Slur::after_line_breaking (SCM smob)
220 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
221 extract_grob_set (me, "note-columns", encompasses);
222 if (encompasses.is_empty ())
225 return SCM_UNSPECIFIED;
228 if (!get_grob_direction (me))
229 set_grob_direction (me, get_default_dir (me));
231 if (scm_ilength (me->get_property ("control-points")) < 4)
232 set_slur_control_points (me);
234 return SCM_UNSPECIFIED;
237 ADD_INTERFACE (Slur, "slur-interface",
239 "positions quant-score eccentricity encompass-objects control-points dash-period dash-fraction slur-details direction height-limit note-columns ratio thickness");