2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2011 Jan Nieuwenhuizen <janneke@gnu.org>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 #include "align-interface.hh"
21 #include "axis-group-interface.hh"
22 #include "font-interface.hh"
23 #include "grob-interface.hh"
25 #include "lily-proto.hh"
26 #include "line-interface.hh"
27 #include "output-def.hh"
28 #include "pointer-group-interface.hh"
30 #include "staff-symbol-referencer.hh"
32 #include "text-interface.hh"
38 DECLARE_SCHEME_CALLBACK (print, (SCM));
39 DECLARE_SCHEME_CALLBACK (calc_left_bound_info, (SCM));
40 DECLARE_SCHEME_CALLBACK (calc_left_bound_info_and_text, (SCM));
41 DECLARE_SCHEME_CALLBACK (calc_right_bound_info, (SCM));
42 DECLARE_SCHEME_CALLBACK (calc_bound_info, (SCM, Direction));
43 DECLARE_GROB_INTERFACE ();
46 Spanner *parent_spanner (Grob *g)
48 if (Spanner::has_interface (g))
49 return dynamic_cast<Spanner *> (g);
50 return parent_spanner (g->get_parent (Y_AXIS));
54 Line_spanner::calc_bound_info (SCM smob, Direction dir)
56 Spanner *me = unsmob_spanner (smob);
58 Grob *commonx = me->get_bound (LEFT)->common_refpoint (me->get_bound (RIGHT), X_AXIS);
59 commonx = me->common_refpoint (commonx, X_AXIS);
61 SCM bound_details = me->get_property ("bound-details");
63 SCM details = SCM_BOOL_F;
64 if (details == SCM_BOOL_F)
65 details = ly_assoc_get ((dir == LEFT)
66 ? ly_symbol2scm ("left")
67 : ly_symbol2scm ("right"), bound_details, SCM_BOOL_F);
69 if (me->get_bound (dir)->break_status_dir ())
71 SCM extra = ly_assoc_get ((dir == LEFT)
72 ? ly_symbol2scm ("left-broken")
73 : ly_symbol2scm ("right-broken"), bound_details, SCM_EOL);
75 for (SCM s = scm_reverse (extra); scm_is_pair (s); s = scm_cdr (s))
76 details = scm_cons (scm_car (s), details);
79 if (details == SCM_BOOL_F)
80 details = ly_assoc_get (ly_symbol2scm ("default"), bound_details, SCM_EOL);
82 SCM text = ly_assoc_get (ly_symbol2scm ("text"), details, SCM_BOOL_F);
83 if (Text_interface::is_markup (text))
85 Output_def *layout = me->layout ();
86 SCM properties = Font_interface::text_font_alist_chain (me);
87 details = scm_acons (ly_symbol2scm ("stencil"),
88 Text_interface::interpret_markup (layout->self_scm (),
93 if (!scm_is_number (ly_assoc_get (ly_symbol2scm ("X"), details, SCM_BOOL_F)))
95 Direction attach = (Direction)
96 robust_scm2int (ly_assoc_get (ly_symbol2scm ("attach-dir"),
100 Item *bound_item = me->get_bound (dir);
101 Grob *bound_grob = bound_item;
102 if (to_boolean (ly_assoc_get (ly_symbol2scm ("end-on-note"), details, SCM_BOOL_F))
103 && bound_item->break_status_dir ())
105 extract_grob_set (me, "note-columns", columns);
107 bound_grob = (dir == LEFT)
108 ? columns[0] : columns.back ();
111 details = scm_acons (ly_symbol2scm ("X"),
112 scm_from_double (robust_relative_extent (bound_grob, commonx, X_AXIS)
113 .linear_combination (attach)),
117 if (!scm_is_number (ly_assoc_get (ly_symbol2scm ("Y"), details, SCM_BOOL_F)))
121 Real extra_dy = robust_scm2double (me->get_property ("extra-dy"),
124 Grob *common_y = me->common_refpoint (me->get_bound (dir), Y_AXIS);
125 if (me->get_bound (dir)->break_status_dir ())
127 if (to_boolean (me->get_property ("simple-Y")))
129 Spanner *orig = dynamic_cast<Spanner *>(me->original ());
130 Spanner *extreme = dir == LEFT ? orig->broken_intos_.front () : orig->broken_intos_.back ();
131 Grob *e_bound = extreme->get_bound (dir);
132 Grob *e_common_y = extreme->common_refpoint (e_bound, Y_AXIS);
133 y = e_bound->extent (e_common_y, Y_AXIS).center ();
137 Spanner *next_sp = me->broken_neighbor (dir);
138 Item *next_bound = next_sp->get_bound (dir);
140 if (next_bound->break_status_dir ())
142 programming_error ("no note heads for the line spanner on neighbor line?"
148 Spanner *next_bound_parent = parent_spanner (next_bound);
149 Interval next_ext = next_bound->extent (next_bound_parent, Y_AXIS);
152 We want to know what would be the y-position of the next
153 bound (relative to my y-parent) if it belonged to the
154 same system as this bound. We rely on the fact that the
155 y-parent of the next bound is a spanner (probably the
156 VerticalAxisGroup of a staff) that extends over the break.
158 Spanner *next_bound_parent_on_this_line
159 = next_bound_parent->broken_neighbor (other_dir (dir));
161 if (next_bound_parent_on_this_line)
163 Grob *common = me->common_refpoint (next_bound_parent_on_this_line, Y_AXIS);
164 Real bound_offset = next_bound_parent_on_this_line->relative_coordinate (common, Y_AXIS);
165 y = next_ext.center () + bound_offset - me->relative_coordinate (common, Y_AXIS);
170 We fall back to assuming that the distance between
171 staves doesn't change over line breaks.
173 programming_error ("next-bound's parent doesn't extend to this line");
174 Grob *next_system = next_bound->get_system ();
175 Grob *this_system = me->get_system ();
176 y = next_ext.center () + next_bound_parent->relative_coordinate (next_system, Y_AXIS)
177 - me->relative_coordinate (this_system, Y_AXIS);
183 y = me->get_bound (dir)->extent (common_y, Y_AXIS).center ();
184 details = scm_acons (ly_symbol2scm ("common-Y"), common_y->self_scm (), details);
187 y += dir * extra_dy / 2;
188 details = scm_acons (ly_symbol2scm ("Y"), scm_from_double (y), details);
194 MAKE_SCHEME_CALLBACK (Line_spanner, calc_right_bound_info, 1);
196 Line_spanner::calc_right_bound_info (SCM smob)
198 return Line_spanner::calc_bound_info (smob, RIGHT);
201 MAKE_SCHEME_CALLBACK (Line_spanner, calc_left_bound_info, 1);
203 Line_spanner::calc_left_bound_info (SCM smob)
205 return Line_spanner::calc_bound_info (smob, LEFT);
208 MAKE_SCHEME_CALLBACK (Line_spanner, calc_left_bound_info_and_text, 1);
210 Line_spanner::calc_left_bound_info_and_text (SCM smob)
212 SCM alist = Line_spanner::calc_bound_info (smob, LEFT);
213 Spanner *me = unsmob_spanner (smob);
215 SCM text = me->get_property ("text");
216 if (Text_interface::is_markup (text)
217 && me->get_bound (LEFT)->break_status_dir () == CENTER
218 && ly_assoc_get (ly_symbol2scm ("stencil"), alist, SCM_BOOL_F) == SCM_BOOL_F)
220 Output_def *layout = me->layout ();
221 SCM properties = Font_interface::text_font_alist_chain (me);
222 alist = scm_acons (ly_symbol2scm ("stencil"),
223 Text_interface::interpret_markup (layout->self_scm (),
231 MAKE_SCHEME_CALLBACK (Line_spanner, print, 1);
233 Line_spanner::print (SCM smob)
235 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
237 // Triggers simple-Y calculations
238 bool simple_y = to_boolean (me->get_property ("simple-Y")) && !to_boolean (me->get_property ("cross-staff"));
240 Drul_array<SCM> bounds (me->get_property ("left-bound-info"),
241 me->get_property ("right-bound-info"));
243 Grob *commonx = me->get_bound (LEFT)->common_refpoint (me->get_bound (RIGHT), X_AXIS);
244 commonx = me->common_refpoint (commonx, X_AXIS);
246 Drul_array<Offset> span_points;
251 Offset z (robust_scm2double (ly_assoc_get (ly_symbol2scm ("X"),
252 bounds[d], SCM_BOOL_F), 0.0),
253 robust_scm2double (ly_assoc_get (ly_symbol2scm ("Y"),
254 bounds[d], SCM_BOOL_F), 0.0));
258 while (flip (&d) != LEFT);
260 Drul_array<Real> gaps (0, 0);
261 Drul_array<bool> arrows (0, 0);
262 Drul_array<Stencil *> stencils (0, 0);
263 Drul_array<Grob *> common_y (0, 0);
265 // For scaling of 'padding and 'stencil-offset
267 = pow (2, robust_scm2double (me->get_property ("font-size"), 0.0) / 6);
271 gaps[d] = robust_scm2double (ly_assoc_get (ly_symbol2scm ("padding"),
272 bounds[d], SCM_BOOL_F), 0.0);
273 arrows[d] = to_boolean (ly_assoc_get (ly_symbol2scm ("arrow"),
274 bounds[d], SCM_BOOL_F));
275 stencils[d] = unsmob_stencil (ly_assoc_get (ly_symbol2scm ("stencil"),
276 bounds[d], SCM_BOOL_F));
277 common_y[d] = unsmob_grob (ly_assoc_get (ly_symbol2scm ("common-Y"),
278 bounds[d], SCM_BOOL_F));
282 while (flip (&d) != LEFT);
284 Grob *my_common_y = common_y[LEFT]->common_refpoint (common_y[RIGHT], Y_AXIS);
289 span_points[d][Y_AXIS] += common_y[d]->relative_coordinate (my_common_y, Y_AXIS);
290 while (flip (&d) != LEFT);
293 Interval normalized_endpoints = robust_scm2interval (me->get_property ("normalized-endpoints"), Interval (0, 1));
294 Real y_length = span_points[RIGHT][Y_AXIS] - span_points[LEFT][Y_AXIS];
296 span_points[LEFT][Y_AXIS] += normalized_endpoints[LEFT] * y_length;
297 span_points[RIGHT][Y_AXIS] -= (1 - normalized_endpoints[RIGHT]) * y_length;
299 Offset dz = (span_points[RIGHT] - span_points[LEFT]);
300 Offset dz_dir = dz.direction ();
301 if (gaps[LEFT] + gaps[RIGHT] > dz.length ())
309 span_points[d] += -d * gaps[d] * magstep * dz.direction ();
313 Stencil s = stencils[d]->translated (span_points[d]);
314 SCM align = ly_assoc_get (ly_symbol2scm ("stencil-align-dir-y"),
315 bounds[d], SCM_BOOL_F);
316 SCM off = ly_assoc_get (ly_symbol2scm ("stencil-offset"),
317 bounds[d], SCM_BOOL_F);
319 if (scm_is_number (align))
320 s.align_to (Y_AXIS, scm_to_double (align));
322 if (is_number_pair (off))
323 s.translate (ly_scm2offset (off) * magstep);
325 line.add_stencil (s);
328 while (flip (&d) != LEFT);
333 span_points[d] += dz_dir *
334 (stencils[d]->extent (X_AXIS)[-d] / dz_dir[X_AXIS]);
336 while (flip (&d) != LEFT);
338 Offset adjust = dz.direction () * Staff_symbol_referencer::staff_space (me);
340 Offset line_left = span_points[LEFT] + (arrows[LEFT] ? adjust * 1.4 : Offset (0, 0));
341 Offset line_right = span_points[RIGHT] - (arrows[RIGHT] ? adjust * 0.55 : Offset (0, 0));
342 if (line_right[X_AXIS] > line_left[X_AXIS])
344 line.add_stencil (Line_interface::line (me, line_left, line_right));
346 line.add_stencil (Line_interface::arrows (me,
353 line.translate (Offset (-me->relative_coordinate (commonx, X_AXIS),
354 simple_y ? 0.0 : -me->relative_coordinate (my_common_y, Y_AXIS)));
356 return line.smobbed_copy ();
359 ADD_INTERFACE (Line_spanner,
360 "Generic line drawn between two objects, e.g., for use with"