lily/multi-measure-rest.cc

   1 /*
   2   multi-measure-rest.cc --  implement Multi_measure_rest
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2003 Jan Nieuwenhuizen <janneke@gnu.org>
   7
   8  */
   9
  10 #include "multi-measure-rest.hh"
  11 #include "warn.hh"
  12 #include "paper-def.hh"
  13 #include "paper-column.hh" // urg
  14 #include "font-interface.hh"
  15 #include "rest.hh"
  16 #include "molecule.hh"
  17 #include "misc.hh"
  18 #include "spanner.hh"
  19 #include "staff-symbol-referencer.hh"
  20 #include "text-item.hh"
  21 #include "percent-repeat-item.hh"
  22 #include "lookup.hh"
  23
  24 MAKE_SCHEME_CALLBACK (Multi_measure_rest,percent,1);
  25 SCM
  26 Multi_measure_rest::percent (SCM smob)
  27 {
  28   Grob *me = unsmob_grob (smob);
  29   Spanner *sp = dynamic_cast<Spanner*> (me);
  30
  31   Molecule r = Percent_repeat_item_interface::x_percent (me, 1,  0.75, 1.6);
  32
  33   // ugh copy & paste.
  34
  35   Interval sp_iv;
  36   Direction d = LEFT;
  37   do
  38     {
  39       Item * col = sp->get_bound (d)->get_column ();
  40
  41       Interval coldim = col->extent (0, X_AXIS);
  42
  43       sp_iv[d] = coldim[-d]  ;
  44     }
  45   while ((flip (&d)) != LEFT);
  46   Real x_off = 0.0;
  47
  48   Real rx  = sp->get_bound (LEFT)->relative_coordinate (0, X_AXIS);
  49   /*
  50     we gotta stay clear of sp_iv, so move a bit to the right if
  51     needed.
  52    */
  53   x_off += (sp_iv[LEFT] -  rx) >? 0;
  54
  55   /*
  56     center between stuff.
  57    */
  58   x_off += sp_iv.length ()/ 2;
  59
  60   r.translate_axis (x_off,X_AXIS);
  61
  62
  63   return r.smobbed_copy ();
  64 }
  65
  66 MAKE_SCHEME_CALLBACK (Multi_measure_rest,brew_molecule,1);
  67 SCM
  68 Multi_measure_rest::brew_molecule (SCM smob)
  69 {
  70   Grob *me = unsmob_grob (smob);
  71   Spanner * sp = dynamic_cast<Spanner*> (me);
  72
  73   Interval sp_iv;
  74   Direction d = LEFT;
  75
  76   Grob *common = sp->get_bound (LEFT)->common_refpoint (sp->get_bound (RIGHT), X_AXIS);
  77   do
  78     {
  79       Item * col = sp->get_bound (d)->get_column ();
  80
  81       Interval coldim = col->extent (common, X_AXIS);
  82
  83       sp_iv[d] = coldim[-d]  ;
  84     }
  85   while ((flip (&d)) != LEFT);
  86
  87   Real space = sp_iv.length();
  88
  89   Real rx  = sp->get_bound (LEFT)->relative_coordinate (0, X_AXIS);
  90   /*
  91     we gotta stay clear of sp_iv, so move a bit to the right if
  92     needed.
  93    */
  94   Real x_off = (sp_iv[LEFT] -  rx) >? 0;
  95
  96
  97   Molecule mol;
  98   mol.add_molecule (symbol_molecule (me, space));
  99
 100   int measures = 0;
 101   SCM m (me->get_grob_property ("measure-count"));
 102   if (gh_number_p (m))
 103     {
 104       measures = gh_scm2int (m);
 105     }
 106
 107   mol.translate_axis (x_off, X_AXIS);
 108   return mol.smobbed_copy ();
 109 }
 110
 111
 112
 113 Molecule
 114 Multi_measure_rest::symbol_molecule (Grob *me, Real space)
 115 {
 116   int measures = 0;
 117   SCM m (me->get_grob_property ("measure-count"));
 118   if (gh_number_p (m))
 119     {
 120       measures = gh_scm2int (m);
 121     }
 122   if (measures <= 0)
 123     return Molecule();
 124
 125
 126   SCM limit = me->get_grob_property ("expand-limit");
 127   if (measures > gh_scm2int (limit))
 128     {
 129       Real padding = 0.15;
 130       Molecule s =  big_rest (me, (1.0 - 2*padding) * space);
 131       s.translate_axis (padding * space,  X_AXIS);
 132       return s;
 133     }
 134
 135   SCM alist_chain = Font_interface::font_alist_chain (me);
 136
 137   Real staff_space = Staff_symbol_referencer::staff_space (me);
 138   Font_metric *musfont
 139     = Font_interface::get_font (me,alist_chain);
 140
 141   SCM sml = me->get_grob_property ("use-breve-rest");
 142   if (measures == 1)
 143     {
 144       if (sml == SCM_BOOL_T)
 145         {
 146           Molecule s = musfont->find_by_name (Rest::glyph_name (me, -1, ""));
 147
 148           s.translate_axis ((space - s.extent (X_AXIS).length ())/2, X_AXIS);
 149
 150           return s ;
 151         }
 152       else
 153         {
 154           Molecule s = musfont->find_by_name (Rest::glyph_name (me, 0, ""));
 155
 156           /*
 157             ugh.
 158            */
 159           if (Staff_symbol_referencer::get_position (me) == 0.0)
 160             s.translate_axis (staff_space, Y_AXIS);
 161
 162           s.translate_axis ((space - s.extent (X_AXIS).length ())/2, X_AXIS);
 163
 164           return s ;
 165         }
 166     }
 167   else
 168     {
 169       return  church_rest (me, musfont, measures, space);
 170     }
 171 }
 172
 173
 174
 175 Molecule
 176 Multi_measure_rest::big_rest (Grob *me, Real width)
 177 {
 178   Real tthick = gh_scm2double (me->get_grob_property ("thick-thickness"));
 179   Real hair_thick = gh_scm2double (me->get_grob_property ("hair-thickness"));
 180
 181
 182   Real ss = Staff_symbol_referencer::staff_space (me);
 183
 184   Real slt = me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
 185   Real y = slt * tthick/2 * ss;
 186   Real ythick = hair_thick * slt * ss;
 187   Box b(Interval (0, width - 2 * ythick), Interval (-y, y));
 188
 189   Molecule m =  Lookup::filledbox (b);
 190   Molecule yb = Lookup::filledbox (Box (Interval (-0.5, 0.5)* ythick, Interval (-ss, ss)));
 191
 192   m.add_at_edge (X_AXIS, RIGHT, yb, 0, 0);
 193   m.add_at_edge (X_AXIS, LEFT, yb, 0, 0);
 194
 195   m.align_to (X_AXIS, LEFT);
 196
 197   return m;
 198 }
 199
 200 /*
 201   Kirchenpause (?)
 202  */
 203 Molecule
 204 Multi_measure_rest::church_rest (Grob*me, Font_metric *musfont, int measures,
 205                                  Real space)
 206 {
 207   SCM mols = SCM_EOL;
 208
 209   /*
 210    see Wanske pp. 125
 211   */
 212   int l = measures;
 213   int count = 0;
 214   Real symbols_width = 0.0;
 215
 216   SCM sml = me->get_grob_property ("use-breve-rest");
 217
 218   while (l)
 219     {
 220       if (sml == SCM_BOOL_T)
 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           Molecule r (musfont->find_by_name ("rests-" + to_string (k)));
 235           symbols_width += r.extent (X_AXIS).length ();
 236           mols = gh_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           Molecule 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 = gh_cons (r.smobbed_copy (), mols);
 265         }
 266       count ++;
 267     }
 268
 269
 270
 271   Real outer_padding_factor = 1.5; //     make outer padding this much bigger.
 272   Real inner_padding = (space - symbols_width) / (2 * outer_padding_factor + (count-1));
 273   if (inner_padding < 0)
 274     {
 275       inner_padding = 1.0;
 276     }
 277
 278   Molecule mol;
 279   for (SCM  s = mols; gh_pair_p (s); s = gh_cdr(s))
 280     {
 281       mol.add_at_edge (X_AXIS, LEFT, *unsmob_molecule (gh_car (s)), inner_padding, 0);
 282     }
 283   mol.align_to (X_AXIS, LEFT);
 284   mol.translate_axis (outer_padding_factor *  inner_padding, X_AXIS);
 285
 286   return mol;
 287 }
 288
 289 void
 290 Multi_measure_rest::add_column (Grob*me,Item* c)
 291 {
 292   add_bound_item (dynamic_cast<Spanner*> (me),c);
 293 }
 294
 295
 296 MAKE_SCHEME_CALLBACK (Multi_measure_rest, set_spacing_rods,1);
 297 SCM
 298 Multi_measure_rest::set_spacing_rods (SCM smob)
 299 {
 300   Grob*me = unsmob_grob (smob);
 301
 302   Spanner*sp = dynamic_cast<Spanner*> (me);
 303   if (! (sp->get_bound (LEFT) && sp->get_bound (RIGHT)))
 304     {
 305       programming_error ("Multi_measure_rest::get_rods (): I am not spanned!");
 306       return SCM_UNSPECIFIED;
 307     }
 308
 309   Item * l = sp->get_bound (LEFT)->get_column ();
 310   Item * r = sp->get_bound (RIGHT)->get_column ();
 311   Item * lb = l->find_prebroken_piece (RIGHT);
 312   Item * rb = r->find_prebroken_piece (LEFT);
 313
 314   Item* combinations[4][2]={{l,r}, {lb,r}, {l,rb},{lb,rb}};
 315
 316   Real sym_width = symbol_molecule (me, 0.0).extent (X_AXIS).length ();
 317
 318   for (int i=0; i < 4; i++)
 319     {
 320       Item * l =  combinations[i][0];
 321       Item *r = combinations[i][1];
 322
 323       if (!l || !r)
 324         continue;
 325
 326       Rod rod;
 327       rod.item_l_drul_[LEFT] = l;
 328       rod.item_l_drul_[RIGHT] = r;
 329
 330
 331       rod.distance_ = l->extent (l, X_AXIS)[BIGGER] - r->extent (r, X_AXIS)[SMALLER]
 332         + sym_width  + 2.0;                     // 2.0 = magic!
 333
 334       Real minlen  =0.0;
 335       SCM ml  =me->get_grob_property ("minimum-length");
 336       if (gh_number_p (ml)) minlen = gh_scm2double (ml);
 337       rod.distance_ = max(rod.distance_,
 338                           minlen);
 339       rod.add_to_cols ();
 340     }
 341   return SCM_UNSPECIFIED;
 342 }
 343
 344
 345
 346
 347 ADD_INTERFACE (Multi_measure_rest,"multi-measure-rest-interface",
 348                "A rest that spans a whole number of measures.",
 349                "expand-limit measure-count hair-thickness thick-thickness use-breve-rest minimum-length");
 350