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--2002 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
  25 MAKE_SCHEME_CALLBACK (Multi_measure_rest,percent,1);
  26 SCM
  27 Multi_measure_rest::percent (SCM smob)
  28 {
  29   Grob *me = unsmob_grob (smob);
  30   Spanner *sp = dynamic_cast<Spanner*> (me);
  31
  32   Molecule r = Percent_repeat_item_interface::x_percent (me, 1,  0.75, 1.6);
  33
  34   // ugh copy & paste.
  35
  36   Interval sp_iv;
  37   Direction d = LEFT;
  38   do
  39     {
  40       Item * col = sp->get_bound (d)->get_column ();
  41
  42       Interval coldim = col->extent (0, X_AXIS);
  43
  44       sp_iv[d] = coldim[-d]  ;
  45     }
  46   while ((flip (&d)) != LEFT);
  47   Real x_off = 0.0;
  48
  49   Real rx  = sp->get_bound (LEFT)->relative_coordinate (0, X_AXIS);
  50   /*
  51     we gotta stay clear of sp_iv, so move a bit to the right if
  52     needed.
  53    */
  54   x_off += (sp_iv[LEFT] -  rx) >? 0;
  55
  56   /*
  57     center between stuff.
  58    */
  59   x_off += sp_iv.length ()/ 2;
  60
  61   r.translate_axis (x_off,X_AXIS);
  62
  63
  64   return r.smobbed_copy ();
  65 }
  66
  67
  68 /*
  69    [TODO]                                      17
  70    variable-sized multi-measure rest symbol: |====| ??
  71 */
  72 MAKE_SCHEME_CALLBACK (Multi_measure_rest,brew_molecule,1);
  73 SCM
  74 Multi_measure_rest::brew_molecule (SCM smob)
  75 {
  76   Grob *me = unsmob_grob (smob);
  77   Spanner * sp = dynamic_cast<Spanner*> (me);
  78
  79   SCM alist_chain = Font_interface::font_alist_chain (me);
  80
  81   Interval sp_iv;
  82   Direction d = LEFT;
  83
  84   Grob *common = sp->get_bound (LEFT)->common_refpoint (sp->get_bound (RIGHT), X_AXIS);
  85   do
  86     {
  87       Item * col = sp->get_bound (d)->get_column ();
  88
  89       Interval coldim = col->extent (common, X_AXIS);
  90
  91       sp_iv[d] = coldim[-d]  ;
  92     }
  93   while ((flip (&d)) != LEFT);
  94
  95   Real space = sp_iv.length();
  96
  97   Real rx  = sp->get_bound (LEFT)->relative_coordinate (0, X_AXIS);
  98   /*
  99     we gotta stay clear of sp_iv, so move a bit to the right if
 100     needed.
 101    */
 102   Real x_off = (sp_iv[LEFT] -  rx) >? 0;
 103
 104
 105   Molecule mol;
 106   mol.add_molecule (symbol_molecule (me, space));
 107
 108   int measures = 0;
 109   SCM m (me->get_grob_property ("measure-count"));
 110   if (gh_number_p (m))
 111     {
 112       measures = gh_scm2int (m);
 113     }
 114
 115   SCM s = me->get_grob_property ("number-threshold");
 116   if (measures > gh_scm2int (s))
 117     {
 118       Molecule s = Text_item::text2molecule (me,
 119                                              scm_makfrom0str (to_string (measures).to_str0 ()),
 120                                              alist_chain);
 121
 122       s.align_to (X_AXIS, CENTER);
 123       s.translate_axis (gh_scm2double (me->get_grob_property ("padding")) + 2,
 124                         Y_AXIS);
 125
 126       s.translate_axis (mol.extent (X_AXIS).center (),  X_AXIS);
 127       mol.add_molecule (s);
 128     }
 129   mol.translate_axis (x_off, X_AXIS);
 130   return mol.smobbed_copy ();
 131 }
 132
 133
 134 Molecule
 135 Multi_measure_rest::symbol_molecule (Grob *me, Real space)
 136 {
 137   int measures = 0;
 138   SCM m (me->get_grob_property ("measure-count"));
 139   if (gh_number_p (m))
 140     {
 141       measures = gh_scm2int (m);
 142     }
 143   if (measures <= 0)
 144     return Molecule();
 145
 146
 147   SCM limit = me->get_grob_property ("expand-limit");
 148   if (measures > gh_scm2int (limit))
 149     {
 150       Real padding = 0.15;
 151       Molecule s =  big_rest (me, (1.0 - 2*padding) * space);
 152       s.translate_axis (padding * space,  X_AXIS);
 153       return s;
 154     }
 155
 156   SCM alist_chain = Font_interface::font_alist_chain (me);
 157
 158   SCM style_chain =
 159     Font_interface::add_style (me, ly_symbol2scm ("mmrest-symbol"),
 160                                alist_chain);
 161
 162   Real staff_space = Staff_symbol_referencer::staff_space (me);
 163   Font_metric *musfont
 164     = Font_interface::get_font (me,style_chain);
 165
 166   if (measures == 1)
 167     {
 168       Molecule s = musfont->find_by_name (Rest::glyph_name (me, 0, ""));
 169
 170       /*
 171         ugh.
 172        */
 173       if (Staff_symbol_referencer::get_position (me) == 0.0)
 174         s.translate_axis (staff_space, Y_AXIS);
 175
 176       s.translate_axis ((space - s.extent (X_AXIS).length ())/2, X_AXIS);
 177
 178       return s ;
 179     }
 180   else
 181     {
 182       return  church_rest (me, musfont, measures, space);
 183     }
 184 }
 185
 186
 187
 188 Molecule
 189 Multi_measure_rest::big_rest (Grob *me, Real width)
 190 {
 191   Real thick = gh_scm2double (me->get_grob_property ("thickness"));
 192   Real ss = Staff_symbol_referencer::staff_space (me);
 193
 194   Real slt = me->get_paper ()->get_var ("linethickness");
 195   Real y = slt * thick/2 * ss;
 196   Box b(Interval (0, width), Interval (-y, y));
 197   Real ythick = slt * ss;
 198
 199   Molecule m =  Lookup::filledbox (b);
 200   Molecule yb = Lookup::filledbox (Box (Interval (-ythick, ythick), Interval (-ss, ss)));
 201
 202   m.add_at_edge (X_AXIS, RIGHT, yb, -ythick);
 203   m.add_at_edge (X_AXIS, LEFT, yb, -ythick);
 204
 205   m.align_to (X_AXIS, LEFT);
 206
 207   return m;
 208 }
 209
 210 /*
 211   Kirchenpause (?)
 212  */
 213 Molecule
 214 Multi_measure_rest::church_rest (Grob*me, Font_metric *musfont, int measures,
 215                                  Real space)
 216 {
 217   SCM mols = SCM_EOL;
 218
 219   /*
 220    see Wanske pp. 125
 221   */
 222   int l = measures;
 223   int count = 0;
 224   Real symbols_width = 0.0;
 225   while (l)
 226     {
 227       int k;
 228       if (l >= 4)
 229         {
 230           l-=4;
 231           k = -2;
 232         }
 233       else if (l>= 2)
 234         {
 235           l -= 2;
 236           k = -1;
 237         }
 238       else
 239         {
 240           k = 0;
 241           l --;
 242         }
 243
 244       Molecule r (musfont->find_by_name ("rests-" + to_string (k)));
 245       if (k == 0)
 246         {
 247           Real staff_space = Staff_symbol_referencer::staff_space (me);
 248           r.translate_axis (staff_space, Y_AXIS);
 249         }
 250       symbols_width += r.extent (X_AXIS).length ();
 251       mols = gh_cons (r.smobbed_copy (), mols);
 252       count ++;
 253     }
 254
 255
 256
 257   Real outer_padding_factor = 1.5; //     make outer padding this much bigger.
 258   Real inner_padding = (space - symbols_width) / (2 * outer_padding_factor + (count-1));
 259   if (inner_padding < 0)
 260     {
 261       inner_padding = 1.0;
 262     }
 263
 264   Molecule mol;
 265   for (SCM  s = mols; gh_pair_p (s); s = gh_cdr(s))
 266     {
 267       mol.add_at_edge (X_AXIS, LEFT, *unsmob_molecule (gh_car (s)), inner_padding);
 268     }
 269   mol.align_to (X_AXIS, LEFT);
 270   mol.translate_axis (outer_padding_factor *  inner_padding, X_AXIS);
 271
 272   return mol;
 273 }
 274
 275 void
 276 Multi_measure_rest::add_column (Grob*me,Item* c)
 277 {
 278   add_bound_item (dynamic_cast<Spanner*> (me),c);
 279 }
 280
 281
 282 MAKE_SCHEME_CALLBACK (Multi_measure_rest, set_spacing_rods,1);
 283
 284 SCM
 285 Multi_measure_rest::set_spacing_rods (SCM smob)
 286 {
 287   return SCM_UNSPECIFIED;
 288
 289   Grob*me = unsmob_grob (smob);
 290
 291   Spanner*sp = dynamic_cast<Spanner*> (me);
 292   if (! (sp->get_bound (LEFT) && sp->get_bound (RIGHT)))
 293     {
 294       programming_error ("Multi_measure_rest::get_rods (): I am not spanned!");
 295       return SCM_UNSPECIFIED;
 296     }
 297
 298   Item * l = sp->get_bound (LEFT)->get_column ();
 299   Item * r = sp->get_bound (RIGHT)->get_column ();
 300   Item * lb = l->find_prebroken_piece (RIGHT);
 301   Item * rb = r->find_prebroken_piece (LEFT);
 302
 303   Item* combinations[4][2]={{l,r}, {lb,r}, {l,rb},{lb,rb}};
 304
 305   Real sym_width = symbol_molecule (me, 0.0).extent (X_AXIS).length ();
 306
 307   for (int i=0; i < 4; i++)
 308     {
 309       Item * l =  combinations[i][0];
 310       Item *r = combinations[i][1];
 311
 312       if (!l || !r)
 313         continue;
 314
 315       Rod rod;
 316       rod.item_l_drul_[LEFT] = l;
 317       rod.item_l_drul_[RIGHT] = r;
 318
 319
 320       rod.distance_ = l->extent (l, X_AXIS)[BIGGER] - r->extent (r, X_AXIS)[SMALLER]
 321         + sym_width  + 2.0;                     // 2.0 = magic!
 322
 323       rod.add_to_cols ();
 324     }
 325   return SCM_UNSPECIFIED;
 326 }
 327
 328
 329
 330 ADD_INTERFACE (Multi_measure_rest,"multi-measure-rest-interface",
 331   "A rest that spans a whole number of measures.  For typesetting the
 332 numbers, fields from font-interface may be used.
 333
 334
 335 ",
 336   "expand-limit measure-count number-threshold padding thickness");