lily/multi-measure-rest.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1998--2010 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
  67   // ugh copy & paste.
  68
  69   Grob *common_x = sp->get_bound (LEFT)->common_refpoint (sp->get_bound (RIGHT),
  70                                                           X_AXIS);
  71   Interval sp_iv = bar_width (sp);
  72   Real x_off = 0.0;
  73
  74   Real rx = sp->get_bound (LEFT)->relative_coordinate (common_x, X_AXIS);
  75   /*
  76     we gotta stay clear of sp_iv, so move a bit to the right if
  77     needed.
  78   */
  79   x_off += max (sp_iv[LEFT] - rx, 0.0);
  80
  81   /*
  82     center between stuff.
  83   */
  84   x_off += sp_iv.length () / 2;
  85
  86   r.translate_axis (x_off, X_AXIS);
  87
  88   return r.smobbed_copy ();
  89 }
  90
  91 MAKE_SCHEME_CALLBACK (Multi_measure_rest, print, 1);
  92 SCM
  93 Multi_measure_rest::print (SCM smob)
  94 {
  95   Grob *me = unsmob_grob (smob);
  96   Spanner *sp = dynamic_cast<Spanner *> (me);
  97
  98   Interval sp_iv = bar_width (sp);
  99   Real space = sp_iv.length ();
 100
 101   Real rx = sp->get_bound (LEFT)->relative_coordinate (0, X_AXIS);
 102   /*
 103     we gotta stay clear of sp_iv, so move a bit to the right if
 104     needed.
 105   */
 106   Real x_off = max (sp_iv[LEFT] - rx, 0.0);
 107
 108   Stencil mol;
 109   mol.add_stencil (symbol_stencil (me, space));
 110
 111   int measures = 0;
 112   SCM m (me->get_property ("measure-count"));
 113   if (scm_is_number (m))
 114     measures = scm_to_int (m);
 115
 116   mol.translate_axis (x_off, X_AXIS);
 117   return mol.smobbed_copy ();
 118 }
 119
 120 Stencil
 121 Multi_measure_rest::symbol_stencil (Grob *me, Real space)
 122 {
 123   int measures = 0;
 124   SCM m (me->get_property ("measure-count"));
 125   if (scm_is_number (m))
 126     measures = scm_to_int (m);
 127   if (measures <= 0)
 128     return Stencil ();
 129
 130   SCM limit = me->get_property ("expand-limit");
 131   if (measures > scm_to_int (limit))
 132     {
 133       Real padding = 0.15;
 134       Stencil s = big_rest (me, (1.0 - 2 * padding) * space);
 135       s.translate_axis (padding * space, X_AXIS);
 136       return s;
 137     }
 138
 139   Real staff_space = Staff_symbol_referencer::staff_space (me);
 140
 141   Font_metric *musfont = Font_interface::get_default_font (me);
 142
 143   SCM sml = me->get_property ("use-breve-rest");
 144   if (measures == 1)
 145     {
 146       if (to_boolean (sml))
 147         {
 148           Stencil s = musfont->find_by_name (Rest::glyph_name (me, -1, "", false));
 149
 150           s.translate_axis ((space - s.extent (X_AXIS).length ()) / 2, X_AXIS);
 151
 152           return s;
 153         }
 154       else
 155         {
 156           Stencil s = musfont->find_by_name (Rest::glyph_name (me, 0, "", true));
 157
 158           /*
 159             ugh.
 160           */
 161           if (Staff_symbol_referencer::get_position (me) == 0.0)
 162             s.translate_axis (staff_space, Y_AXIS);
 163
 164           s.translate_axis ((space - s.extent (X_AXIS).length ()) / 2, X_AXIS);
 165
 166           return s;
 167         }
 168     }
 169   else
 170     return church_rest (me, musfont, measures, space);
 171 }
 172
 173 /*
 174   WIDTH can also be 0 to determine the minimum size of the object.
 175 */
 176 Stencil
 177 Multi_measure_rest::big_rest (Grob *me, Real width)
 178 {
 179   Real thick_thick = robust_scm2double (me->get_property ("thick-thickness"), 1.0);
 180   Real hair_thick = robust_scm2double (me->get_property ("hair-thickness"), .1);
 181
 182   Real ss = Staff_symbol_referencer::staff_space (me);
 183   Real slt = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
 184   Real y = slt * thick_thick / 2 * ss;
 185   Real ythick = hair_thick * slt * ss;
 186   Box b (Interval (0.0, max (0.0, (width - 2 * ythick))), Interval (-y, y));
 187
 188   Real blot = width ? (.8 * min (y, ythick)) : 0.0;
 189
 190   Stencil m = Lookup::round_filled_box (b, blot);
 191   Stencil yb = Lookup::round_filled_box (Box (Interval (-0.5, 0.5) * ythick, Interval (-ss, ss)), blot);
 192
 193   m.add_at_edge (X_AXIS, RIGHT, yb, 0);
 194   m.add_at_edge (X_AXIS, LEFT, yb, 0);
 195
 196   m.align_to (X_AXIS, LEFT);
 197
 198   return m;
 199 }
 200
 201 /*
 202   Kirchenpause (?)
 203 */
 204 Stencil
 205 Multi_measure_rest::church_rest (Grob *me, Font_metric *musfont, int measures,
 206                                  Real space)
 207 {
 208   SCM mols = SCM_EOL;
 209
 210   /* See Wanske pp. 125  */
 211   int l = measures;
 212   int count = 0;
 213   Real symbols_width = 0.0;
 214
 215   bool use_breve = to_boolean (me->get_property ("use-breve-rest"));
 216
 217   while (l)
 218     {
 219       if (use_breve)
 220         {
 221           int k;
 222           if (l >= 2)
 223             {
 224               l -= 2;
 225               k = -2;
 226             }
 227           else
 228             {
 229               l -= 1;
 230               k = -1;
 231             }
 232
 233           Stencil r (musfont->find_by_name ("rests." + to_string (k)));
 234           symbols_width += r.extent (X_AXIS).length ();
 235           mols = scm_cons (r.smobbed_copy (), mols);
 236         }
 237       else
 238         {
 239           int k;
 240           if (l >= 4)
 241             {
 242               l -= 4;
 243               k = -2;
 244             }
 245           else if (l >= 2)
 246             {
 247               l -= 2;
 248               k = -1;
 249             }
 250           else
 251             {
 252               k = 0;
 253               l--;
 254             }
 255
 256           Stencil r (musfont->find_by_name ("rests." + to_string (k)));
 257           if (k == 0)
 258             {
 259               Real staff_space = Staff_symbol_referencer::staff_space (me);
 260               r.translate_axis (staff_space, Y_AXIS);
 261             }
 262           symbols_width += r.extent (X_AXIS).length ();
 263           mols = scm_cons (r.smobbed_copy (), mols);
 264         }
 265       count++;
 266     }
 267
 268   /* Make outer padding this much bigger.  */
 269   Real outer_padding_factor = 1.5;
 270   Real inner_padding = (space - symbols_width)
 271     / (2 * outer_padding_factor + (count - 1));
 272   if (inner_padding < 0)
 273     inner_padding = 1.0;
 274
 275   Stencil mol;
 276   for (SCM s = mols; scm_is_pair (s); s = scm_cdr (s))
 277     mol.add_at_edge (X_AXIS, LEFT, *unsmob_stencil (scm_car (s)),
 278                      inner_padding);
 279   mol.align_to (X_AXIS, LEFT);
 280   mol.translate_axis (outer_padding_factor * inner_padding, X_AXIS);
 281
 282   return mol;
 283 }
 284
 285 void
 286 Multi_measure_rest::add_column (Grob *me, Item *c)
 287 {
 288   add_bound_item (dynamic_cast<Spanner *> (me), c);
 289 }
 290
 291 void
 292 Multi_measure_rest::calculate_spacing_rods (Grob *me, Real length)
 293 {
 294   Spanner *sp = dynamic_cast<Spanner *> (me);
 295   if (! (sp->get_bound (LEFT) && sp->get_bound (RIGHT)))
 296     {
 297       programming_error ("Multi_measure_rest::get_rods (): I am not spanned!");
 298       return;
 299     }
 300
 301   Item *li = sp->get_bound (LEFT)->get_column ();
 302   Item *ri = sp->get_bound (RIGHT)->get_column ();
 303   Item *lb = li->find_prebroken_piece (RIGHT);
 304   Item *rb = ri->find_prebroken_piece (LEFT);
 305
 306   Item *combinations[4][2] = {{li, ri},
 307                               {lb, ri},
 308                               {li, rb},
 309                               {lb, rb}};
 310
 311   for (int i = 0; i < 4; i++)
 312     {
 313       Item *li = combinations[i][0];
 314       Item *ri = combinations[i][1];
 315
 316       if (!li || !ri)
 317         continue;
 318
 319       Rod rod;
 320       rod.item_drul_[LEFT] = li;
 321       rod.item_drul_[RIGHT] = ri;
 322
 323       rod.distance_ = Paper_column::minimum_distance (li, ri)
 324         + length
 325         + 2 * robust_scm2double (me->get_property ("bound-padding"), 1.0);
 326
 327       Real minlen = robust_scm2double (me->get_property ("minimum-length"), 0);
 328       rod.distance_ = max (rod.distance_, minlen);
 329       rod.add_to_cols ();
 330     }
 331 }
 332
 333 MAKE_SCHEME_CALLBACK (Multi_measure_rest, set_spacing_rods, 1);
 334 SCM
 335 Multi_measure_rest::set_spacing_rods (SCM smob)
 336 {
 337   Grob *me = unsmob_grob (smob);
 338   Real sym_width = symbol_stencil (me, 0.0).extent (X_AXIS).length ();
 339   calculate_spacing_rods (me, sym_width);
 340
 341   return SCM_UNSPECIFIED;
 342 }
 343
 344 MAKE_SCHEME_CALLBACK (Multi_measure_rest, set_text_rods, 1);
 345 SCM
 346 Multi_measure_rest::set_text_rods (SCM smob)
 347 {
 348   Grob *me = unsmob_grob (smob);
 349   Stencil *stil = me->get_stencil ();
 350
 351   /* FIXME uncached */
 352   Real len = (stil && !stil->extent (X_AXIS).is_empty ())
 353     ? stil->extent (X_AXIS).length ()
 354     : 0.0;
 355   calculate_spacing_rods (me, len);
 356
 357   return SCM_UNSPECIFIED;
 358 }
 359
 360 ADD_INTERFACE (Multi_measure_rest,
 361                "A rest that spans a whole number of measures.",
 362
 363                /* properties */
 364                "bound-padding "
 365                "expand-limit "
 366                "hair-thickness "
 367                "measure-count "
 368                "minimum-length "
 369                "spacing-pair "
 370                "thick-thickness "
 371                "use-breve-rest "
 372                );