lily/multi-measure-rest.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1998--2011 Jan Nieuwenhuizen <janneke@gnu.org>
   5
   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.
  10
  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.
  15
  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/>.
  18 */
  19
  20 #include "multi-measure-rest.hh"
  21
  22 #include "font-interface.hh"
  23 #include "lookup.hh"
  24 #include "misc.hh"
  25 #include "output-def.hh"
  26 #include "paper-column.hh" // urg
  27 #include "percent-repeat-item.hh"
  28 #include "rest.hh"
  29 #include "separation-item.hh"
  30 #include "spanner.hh"
  31 #include "staff-symbol-referencer.hh"
  32 #include "system.hh"
  33 #include "text-interface.hh"
  34 #include "warn.hh"
  35
  36 Interval
  37 Multi_measure_rest::bar_width (Spanner *me)
  38 {
  39   SCM spacing_pair = me->get_property ("spacing-pair");
  40   Interval iv;
  41   Direction d = LEFT;
  42   do
  43     {
  44       Item *col = me->get_bound (d)->get_column ();
  45       SCM align_sym
  46         = (scm_is_pair (spacing_pair)
  47            ? index_get_cell (spacing_pair, d)
  48            : ly_symbol2scm ("staff-bar"));
  49       Interval coldim = Paper_column::break_align_width (col, align_sym);
  50
  51       iv[d] = coldim[-d];
  52     }
  53   while (flip (&d) != LEFT);
  54
  55   return iv;
  56 }
  57
  58 MAKE_SCHEME_CALLBACK (Multi_measure_rest, percent, 1);
  59 SCM
  60 Multi_measure_rest::percent (SCM smob)
  61 {
  62   Grob *me = unsmob_grob (smob);
  63   Spanner *sp = dynamic_cast<Spanner *> (me);
  64
  65   Stencil r = Percent_repeat_item_interface::x_percent (me, 1);
  66   r.translate_axis (-r.extent (X_AXIS).center (), X_AXIS);
  67
  68   // ugh copy & paste.
  69
  70   Grob *common_x = sp->get_bound (LEFT)->common_refpoint (sp->get_bound (RIGHT),
  71                                                           X_AXIS);
  72   Interval sp_iv = bar_width (sp);
  73   Real x_off = 0.0;
  74
  75   Real rx = sp->get_bound (LEFT)->relative_coordinate (common_x, X_AXIS);
  76   /*
  77     we gotta stay clear of sp_iv, so move a bit to the right if
  78     needed.
  79   */
  80   x_off += max (sp_iv[LEFT] - rx, 0.0);
  81
  82   /*
  83     center between stuff.
  84   */
  85   x_off += sp_iv.length () / 2;
  86
  87   r.translate_axis (x_off, X_AXIS);
  88
  89   return r.smobbed_copy ();
  90 }
  91
  92 MAKE_SCHEME_CALLBACK (Multi_measure_rest, print, 1);
  93 SCM
  94 Multi_measure_rest::print (SCM smob)
  95 {
  96   Grob *me = unsmob_grob (smob);
  97   Spanner *sp = dynamic_cast<Spanner *> (me);
  98
  99   Interval sp_iv = bar_width (sp);
 100   Real space = sp_iv.length ();
 101
 102   Real rx = sp->get_bound (LEFT)->relative_coordinate (0, X_AXIS);
 103   /*
 104     we gotta stay clear of sp_iv, so move a bit to the right if
 105     needed.
 106   */
 107   Real x_off = max (sp_iv[LEFT] - rx, 0.0);
 108
 109   Stencil mol;
 110   mol.add_stencil (symbol_stencil (me, space));
 111
 112   int measures = 0;
 113   SCM m (me->get_property ("measure-count"));
 114   if (scm_is_number (m))
 115     measures = scm_to_int (m);
 116
 117   mol.translate_axis (x_off, X_AXIS);
 118   return mol.smobbed_copy ();
 119 }
 120
 121 Stencil
 122 Multi_measure_rest::symbol_stencil (Grob *me, Real space)
 123 {
 124   int measures = 0;
 125   SCM m (me->get_property ("measure-count"));
 126   if (scm_is_number (m))
 127     measures = scm_to_int (m);
 128   if (measures <= 0)
 129     return Stencil ();
 130
 131   SCM limit = me->get_property ("expand-limit");
 132   if (measures > scm_to_int (limit))
 133     {
 134       Real padding = 0.15;
 135       Stencil s = big_rest (me, (1.0 - 2 * padding) * space);
 136       s.translate_axis (padding * space, X_AXIS);
 137       return s;
 138     }
 139
 140   Real staff_space = Staff_symbol_referencer::staff_space (me);
 141
 142   Font_metric *musfont = Font_interface::get_default_font (me);
 143
 144   SCM sml = me->get_property ("use-breve-rest");
 145   if (measures == 1)
 146     {
 147       if (to_boolean (sml))
 148         {
 149           Stencil s = musfont->find_by_name (Rest::glyph_name (me, -1, "", false));
 150
 151           s.translate_axis ((space - s.extent (X_AXIS).length ()) / 2, X_AXIS);
 152
 153           return s;
 154         }
 155       else
 156         {
 157           Stencil s = musfont->find_by_name (Rest::glyph_name (me, 0, "", true));
 158
 159           /*
 160             ugh.
 161           */
 162           if (Staff_symbol_referencer::get_position (me) == 0.0)
 163             s.translate_axis (staff_space, Y_AXIS);
 164
 165           s.translate_axis ((space - s.extent (X_AXIS).length ()) / 2, X_AXIS);
 166
 167           return s;
 168         }
 169     }
 170   else
 171     return church_rest (me, musfont, measures, space);
 172 }
 173
 174 /*
 175   WIDTH can also be 0 to determine the minimum size of the object.
 176 */
 177 Stencil
 178 Multi_measure_rest::big_rest (Grob *me, Real width)
 179 {
 180   Real thick_thick = robust_scm2double (me->get_property ("thick-thickness"), 1.0);
 181   Real hair_thick = robust_scm2double (me->get_property ("hair-thickness"), .1);
 182
 183   Real ss = Staff_symbol_referencer::staff_space (me);
 184   Real slt = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
 185   Real y = slt * thick_thick / 2 * ss;
 186   Real ythick = hair_thick * slt * ss;
 187   Box b (Interval (0.0, max (0.0, (width - 2 * ythick))), Interval (-y, y));
 188
 189   Real blot = width ? (.8 * min (y, ythick)) : 0.0;
 190
 191   Stencil m = Lookup::round_filled_box (b, blot);
 192   Stencil yb = Lookup::round_filled_box (Box (Interval (-0.5, 0.5) * ythick, Interval (-ss, ss)), blot);
 193
 194   m.add_at_edge (X_AXIS, RIGHT, yb, 0);
 195   m.add_at_edge (X_AXIS, LEFT, yb, 0);
 196
 197   m.align_to (X_AXIS, LEFT);
 198
 199   return m;
 200 }
 201
 202 /*
 203   Kirchenpause (?)
 204 */
 205 Stencil
 206 Multi_measure_rest::church_rest (Grob *me, Font_metric *musfont, int measures,
 207                                  Real space)
 208 {
 209   SCM mols = SCM_EOL;
 210
 211   /* See Wanske pp. 125  */
 212   int l = measures;
 213   int count = 0;
 214   Real symbols_width = 0.0;
 215
 216   bool use_breve = to_boolean (me->get_property ("use-breve-rest"));
 217
 218   while (l)
 219     {
 220       if (use_breve)
 221         {
 222           int k;
 223           if (l >= 2)
 224             {
 225               l -= 2;
 226               k = -2;
 227             }
 228           else
 229             {
 230               l -= 1;
 231               k = -1;
 232             }
 233
 234           Stencil r (musfont->find_by_name ("rests." + to_string (k)));
 235           symbols_width += r.extent (X_AXIS).length ();
 236           mols = scm_cons (r.smobbed_copy (), mols);
 237         }
 238       else
 239         {
 240           int k;
 241           if (l >= 4)
 242             {
 243               l -= 4;
 244               k = -2;
 245             }
 246           else if (l >= 2)
 247             {
 248               l -= 2;
 249               k = -1;
 250             }
 251           else
 252             {
 253               k = 0;
 254               l--;
 255             }
 256
 257           Stencil r (musfont->find_by_name ("rests." + to_string (k)));
 258           if (k == 0)
 259             {
 260               Real staff_space = Staff_symbol_referencer::staff_space (me);
 261               r.translate_axis (staff_space, Y_AXIS);
 262             }
 263           symbols_width += r.extent (X_AXIS).length ();
 264           mols = scm_cons (r.smobbed_copy (), mols);
 265         }
 266       count++;
 267     }
 268
 269   /* Make outer padding this much bigger.  */
 270   Real outer_padding_factor = 1.5;
 271   Real inner_padding = (space - symbols_width)
 272     / (2 * outer_padding_factor + (count - 1));
 273   if (inner_padding < 0)
 274     inner_padding = 1.0;
 275
 276   Stencil mol;
 277   for (SCM s = mols; scm_is_pair (s); s = scm_cdr (s))
 278     mol.add_at_edge (X_AXIS, LEFT, *unsmob_stencil (scm_car (s)),
 279                      inner_padding);
 280   mol.align_to (X_AXIS, LEFT);
 281   mol.translate_axis (outer_padding_factor * inner_padding, X_AXIS);
 282
 283   return mol;
 284 }
 285
 286 void
 287 Multi_measure_rest::add_column (Grob *me, Item *c)
 288 {
 289   add_bound_item (dynamic_cast<Spanner *> (me), c);
 290 }
 291
 292 void
 293 Multi_measure_rest::calculate_spacing_rods (Grob *me, Real length)
 294 {
 295   Spanner *sp = dynamic_cast<Spanner *> (me);
 296   if (! (sp->get_bound (LEFT) && sp->get_bound (RIGHT)))
 297     {
 298       programming_error ("Multi_measure_rest::get_rods (): I am not spanned!");
 299       return;
 300     }
 301
 302   Item *li = sp->get_bound (LEFT)->get_column ();
 303   Item *ri = sp->get_bound (RIGHT)->get_column ();
 304   Item *lb = li->find_prebroken_piece (RIGHT);
 305   Item *rb = ri->find_prebroken_piece (LEFT);
 306
 307   Item *combinations[4][2] = {{li, ri},
 308                               {lb, ri},
 309                               {li, rb},
 310                               {lb, rb}};
 311
 312   for (int i = 0; i < 4; i++)
 313     {
 314       Item *li = combinations[i][0];
 315       Item *ri = combinations[i][1];
 316
 317       if (!li || !ri)
 318         continue;
 319
 320       Rod rod;
 321       rod.item_drul_[LEFT] = li;
 322       rod.item_drul_[RIGHT] = ri;
 323
 324       rod.distance_ = Paper_column::minimum_distance (li, ri)
 325         + length
 326         + 2 * robust_scm2double (me->get_property ("bound-padding"), 1.0);
 327
 328       Real minlen = robust_scm2double (me->get_property ("minimum-length"), 0);
 329       rod.distance_ = max (rod.distance_, minlen);
 330       rod.add_to_cols ();
 331     }
 332 }
 333
 334 MAKE_SCHEME_CALLBACK (Multi_measure_rest, set_spacing_rods, 1);
 335 SCM
 336 Multi_measure_rest::set_spacing_rods (SCM smob)
 337 {
 338   Grob *me = unsmob_grob (smob);
 339   Real sym_width = symbol_stencil (me, 0.0).extent (X_AXIS).length ();
 340   calculate_spacing_rods (me, sym_width);
 341
 342   return SCM_UNSPECIFIED;
 343 }
 344
 345 MAKE_SCHEME_CALLBACK (Multi_measure_rest, set_text_rods, 1);
 346 SCM
 347 Multi_measure_rest::set_text_rods (SCM smob)
 348 {
 349   Grob *me = unsmob_grob (smob);
 350   Stencil *stil = me->get_stencil ();
 351
 352   /* FIXME uncached */
 353   Real len = (stil && !stil->extent (X_AXIS).is_empty ())
 354     ? stil->extent (X_AXIS).length ()
 355     : 0.0;
 356   calculate_spacing_rods (me, len);
 357
 358   return SCM_UNSPECIFIED;
 359 }
 360
 361 ADD_INTERFACE (Multi_measure_rest,
 362                "A rest that spans a whole number of measures.",
 363
 364                /* properties */
 365                "bound-padding "
 366                "expand-limit "
 367                "hair-thickness "
 368                "measure-count "
 369                "minimum-length "
 370                "spacing-pair "
 371                "thick-thickness "
 372                "use-breve-rest "
 373                );