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"
32 get_default_dir (Grob *me)
34 extract_grob_set (me, "note-columns", encompasses);
37 for (int i = 0; i < encompasses.size (); i++)
39 if (Note_column::dir (encompasses[i]) < 0)
48 MAKE_SCHEME_CALLBACK (Slur, height, 2);
50 Slur::height (SCM smob, SCM ax)
52 Axis a = (Axis)scm_to_int (ax);
53 Grob *me = unsmob_grob (smob);
56 SCM mol = me->get_uncached_stencil ();
58 if (Stencil *m = unsmob_stencil (mol))
60 return ly_interval2scm (ext);
64 Ugh should have dash-length + dash-period
66 MAKE_SCHEME_CALLBACK (Slur, print, 1);
68 Slur::print (SCM smob)
70 Grob *me = unsmob_grob (smob);
71 extract_grob_set (me, "note-columns", encompasses);
72 if (encompasses.is_empty ())
78 Real staff_thick = Staff_symbol_referencer::line_thickness (me);
79 Real base_thick = robust_scm2double (me->get_property ("thickness"), 1);
80 Real thick = base_thick * staff_thick;
81 Bezier one = get_curve (me);
85 TODO: replace dashed with generic property.
87 SCM p = me->get_property ("dash-period");
88 SCM f = me->get_property ("dash-fraction");
89 if (scm_is_number (p) && scm_is_number (f))
90 a = Lookup::dashed_slur (one, thick, robust_scm2double (p, 1.0),
91 robust_scm2double (f, 0));
93 a = Lookup::slur (one,
94 get_grob_direction (me) * staff_thick * 1.0,
97 #if DEBUG_SLUR_SCORING
98 SCM quant_score = me->get_property ("quant-score");
100 if (to_boolean (me->get_layout ()
101 ->lookup_variable (ly_symbol2scm ("debug-slur-scoring")))
102 && scm_is_string (quant_score))
105 SCM properties = Font_interface::text_font_alist_chain (me);
107 Stencil tm = *unsmob_stencil (Text_interface::interpret_markup
108 (me->get_layout ()->self_scm (), properties,
110 a.add_at_edge (Y_AXIS, get_grob_direction (me), tm, 1.0, 0);
114 return a.smobbed_copy ();
118 Slur::get_curve (Grob *me)
122 for (SCM s = me->get_property ("control-points"); s != SCM_EOL;
124 b.control_[i++] = ly_scm2offset (scm_car (s));
130 Slur::add_column (Grob *me, Grob *n)
132 Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-columns"), n);
133 add_bound_item (dynamic_cast<Spanner *> (me), dynamic_cast<Item *> (n));
137 Slur::add_extra_encompass (Grob *me, Grob *n)
139 Pointer_group_interface::add_grob (me, ly_symbol2scm ("encompass-objects"), n);
140 me->add_dependency (n);
143 #include "script-interface.hh"
144 MAKE_SCHEME_CALLBACK (Slur, outside_slur_callback, 2);
146 Slur::outside_slur_callback (SCM grob, SCM axis)
148 Grob *script = unsmob_grob (grob);
149 Axis a = Axis (scm_to_int (axis));
151 assert (a == Y_AXIS);
153 Grob *slur = unsmob_grob (script->get_object ("slur"));
156 return scm_from_int (0);
158 Direction dir = get_grob_direction (script);
160 return scm_from_int (0);
162 /* FIXME: this dependency should be automatic. */
163 if (scm_ilength (slur->get_property ("control-points")) < 4)
164 Slur::after_line_breaking (slur->self_scm ());
166 Grob *cx = script->common_refpoint (slur, X_AXIS);
167 Grob *cy = script->common_refpoint (slur, Y_AXIS);
169 Bezier curve = Slur::get_curve (slur);
171 curve.translate (Offset (slur->relative_coordinate (cx, X_AXIS),
172 slur->relative_coordinate (cy, Y_AXIS)));
174 Interval yext = robust_relative_extent (script, cy, Y_AXIS);
175 Interval xext = robust_relative_extent (script, cx, X_AXIS);
177 /* FIXME: slur property, script property? */
178 Real slur_padding = robust_scm2double (script->get_property ("slur-padding"),
180 yext.widen (slur_padding);
183 Interval bezext (curve.control_[0][X_AXIS], curve.control_[3][X_AXIS]);
184 bool consider[] = { false, false, false };
185 Real ys[] = {0, 0, 0};
186 bool do_shift = false;
187 SCM avoid = script->get_property ("avoid-slur");
189 for (int d = LEFT, k = 0; d <= RIGHT; d++, k++)
191 Real x = xext.linear_combination ((Direction) d);
192 consider[k] = bezext.contains (x);
197 = (fabs (bezext[LEFT] - x) < EPS)
198 ? curve.control_[0][Y_AXIS]
199 : ((fabs (bezext[RIGHT] - x) < EPS)
200 ? curve.control_[3][Y_AXIS]
201 : curve.get_other_coordinate (X_AXIS, x));
204 /* Request shift if slur is contained script's Y, or if
205 script is inside slur and avoid == outside. */
206 if (yext.contains (ys[k])
207 || (avoid == ly_symbol2scm ("outside")
208 && dir * ys[k] > dir * yext[-dir]))
215 for (int d = LEFT, k = 0; d <= RIGHT; d++, k++)
216 offset = dir * (max (dir * offset,
217 dir * (ys[k] - yext[-dir] + dir * slur_padding)));
220 return scm_from_double (offset);
223 MAKE_SCHEME_CALLBACK (Slur, after_line_breaking, 1);
225 Slur::after_line_breaking (SCM smob)
227 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
228 extract_grob_set (me, "note-columns", encompasses);
229 if (encompasses.is_empty ())
232 return SCM_UNSPECIFIED;
235 if (!get_grob_direction (me))
236 set_grob_direction (me, get_default_dir (me));
238 if (scm_ilength (me->get_property ("control-points")) < 4)
239 set_slur_control_points (me);
241 return SCM_UNSPECIFIED;
244 ADD_INTERFACE (Slur, "slur-interface",
246 "positions quant-score eccentricity encompass-objects control-points dash-period dash-fraction slur-details direction height-limit note-columns ratio thickness");