lily/tuplet-spanner.cc

   1 /*
   2   plet-spanner.cc -- implement Tuplet_spanner
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "atom.hh"
  10 #include "beam.hh"
  11 #include "box.hh"
  12 #include "debug.hh"
  13 #include "lookup.hh"
  14 #include "molecule.hh"
  15 #include "paper-column.hh"
  16 #include "paper-def.hh"
  17 #include "tuplet-spanner.hh"
  18 #include "stem.hh"
  19 #include "note-column.hh"
  20 #include "dimensions.hh"
  21 #include "group-interface.hh"
  22 #include "directional-element-interface.hh"
  23
  24
  25 Tuplet_spanner::Tuplet_spanner ()
  26 {
  27   set_elt_property ("beams", SCM_EOL);
  28   set_elt_property ("columns", SCM_EOL);
  29 }
  30
  31 /*
  32   TODO.
  33  */
  34 Molecule*
  35 Tuplet_spanner::do_brew_molecule_p () const
  36 {
  37   Molecule* mol_p = new Molecule;
  38
  39   // Default behaviour: number always, bracket when no beam!
  40   bool par_beam = to_boolean (get_elt_property ("parallel-beam"));
  41   bool bracket_visibility = !par_beam;
  42   bool number_visibility = true;
  43
  44   SCM bracket = get_elt_property ("tuplet-bracket-visibility");
  45   if (gh_boolean_p (bracket))
  46     {
  47       bracket_visibility = gh_scm2bool (bracket);
  48     }
  49   else if (bracket == ly_symbol2scm ("if-no-beam"))
  50     bracket_visibility = !par_beam;
  51
  52   SCM numb = get_elt_property ("tuplet-number-visibility");
  53   if (gh_boolean_p (numb))
  54     {
  55       number_visibility = gh_scm2bool (numb);
  56     }
  57   else if (bracket == ly_symbol2scm ("if-no-beam"))
  58     number_visibility = !par_beam;
  59
  60   if (gh_pair_p (get_elt_property ("columns")))
  61     {
  62       Link_array<Note_column> column_arr=
  63         Group_interface__extract_elements (this, (Note_column*)0, "columns");
  64
  65       Real ncw = column_arr.top ()->extent(X_AXIS).length ();
  66       Real w = spanner_length () + ncw;
  67
  68
  69       Real staff_space = paper_l ()->get_var ("interline");
  70       Direction dir = directional_element (this).get ();
  71       Real dy = gh_scm2double (get_elt_property ("delta-y"));
  72       SCM number = get_elt_property ("text");
  73       if (gh_string_p (number) && number_visibility)
  74         {
  75           Molecule
  76             num (lookup_l ()->text ("italic",
  77                                     ly_scm2string (number), paper_l ()));
  78           num.align_to (X_AXIS, CENTER);
  79           num.translate_axis (w/2, X_AXIS);
  80           num.align_to (Y_AXIS, CENTER);
  81           num.translate_axis (dir * staff_space, Y_AXIS);
  82
  83           num.translate_axis (dy/2, Y_AXIS);
  84
  85           mol_p->add_molecule (num);
  86         }
  87
  88       Real thick = paper_l ()->get_var ("tuplet_thick");
  89       if (bracket_visibility)
  90         {
  91           Real gap = paper_l () -> get_var ("tuplet_spanner_gap");
  92           Real height = staff_space;
  93           SCM at =gh_list(ly_symbol2scm ("tuplet"),
  94                                        gh_double2scm (height),
  95                                        gh_double2scm (gap),
  96                                        gh_double2scm (w),
  97                                        gh_double2scm (dy),
  98                                        gh_double2scm (thick),
  99                                        gh_int2scm (dir),
 100                                        SCM_UNDEFINED);
 101
 102           mol_p->add_atom (at);
 103         }
 104
 105       mol_p->translate_axis (dir * staff_space, Y_AXIS);
 106     }
 107   return mol_p;
 108 }
 109
 110 void
 111 Tuplet_spanner::do_add_processing ()
 112 {
 113   if (gh_pair_p (get_elt_property ("columns")))
 114     {
 115       Link_array<Note_column> column_arr=
 116         Group_interface__extract_elements (this, (Note_column*)0, "columns");
 117
 118       set_bounds (LEFT, column_arr[0]);
 119       set_bounds (RIGHT, column_arr.top ());
 120     }
 121 }
 122
 123
 124
 125 /*
 126   use first -> last note for slope, and then correct for disturbing
 127   notes in between.  */
 128 void
 129 Tuplet_spanner::calc_position_and_height (Real *offset, Real * dy) const
 130 {
 131   Link_array<Note_column> column_arr=
 132     Group_interface__extract_elements (this, (Note_column*)0, "columns");
 133
 134
 135   Direction d = directional_element (this).get ();
 136
 137   /*
 138     Use outer non-rest columns to determine slope
 139    */
 140   int l = 0;
 141   while (l <column_arr.size() && column_arr[l]->rest_b())
 142     l ++;
 143
 144   int r = column_arr.size ()- 1;
 145   while (r >= l && column_arr[r]->rest_b())
 146     r--;
 147
 148   if (l < r)
 149     {
 150       *dy = column_arr[r]->extent (Y_AXIS) [d]
 151         - column_arr[l]->extent (Y_AXIS) [d];
 152     }
 153   else
 154     * dy = 0;
 155
 156
 157   *offset = - d * infinity_f;
 158
 159   Real x0 = column_arr[0]->hpos_f ();
 160   Real x1 = column_arr.top ()->hpos_f ();
 161
 162   Real factor = column_arr.size () > 1 ? 1/(x1 - x0) : 1.0;
 163
 164   for (int i = 0; i < column_arr.size ();  i++)
 165     {
 166       Real notey = column_arr[i]->extent (Y_AXIS)[d];
 167       Real x = column_arr[i]->hpos_f () - x0;
 168       Real tuplety =  *dy * x * factor;
 169
 170       if (notey * d > (*offset + tuplety) * d)
 171         *offset = notey - tuplety;
 172     }
 173 }
 174
 175 /*
 176   use first -> last note for slope,
 177 */
 178 void
 179 Tuplet_spanner::calc_dy (Real * dy) const
 180 {
 181   Link_array<Note_column> column_arr=
 182     Group_interface__extract_elements (this, (Note_column*)0, "columns");
 183
 184
 185   Direction d = directional_element (this).get ();
 186   *dy = column_arr.top ()->extent (Y_AXIS) [d]
 187     - column_arr[0]->extent (Y_AXIS) [d];
 188 }
 189
 190 void
 191 Tuplet_spanner::do_post_processing ()
 192 {
 193   Link_array<Note_column> column_arr=
 194     Group_interface__extract_elements (this, (Note_column*)0, "columns");
 195
 196   if (!column_arr.size ())
 197     {
 198       set_elt_property ("transparent", SCM_BOOL_T);
 199       set_empty (X_AXIS);
 200       set_empty (Y_AXIS);
 201     }
 202
 203   Direction d =   directional_element (this).get ();
 204   if (!d)
 205     {
 206       d = get_default_dir ();
 207       directional_element (this).set (d);
 208
 209     }
 210   Real dy, offset;
 211
 212 calc_position_and_height  (&offset,&dy);
 213   // calc_position (&offset, dy);
 214
 215   set_elt_property ("delta-y", gh_double2scm (dy));
 216
 217   translate_axis (offset, Y_AXIS);
 218
 219   if (scm_ilength (get_elt_property ("beams")) == 1)
 220     {
 221       SCM bs = get_elt_property ("beams");
 222       Score_element *b = unsmob_element (gh_car (bs));
 223       Beam * beam_l = dynamic_cast<Beam*> (b);
 224       if (!broken_b ()
 225           && spanned_drul_[LEFT]->column_l () == beam_l->spanned_drul_[LEFT]->column_l ()
 226           && spanned_drul_[RIGHT]->column_l () == beam_l->spanned_drul_[RIGHT]->column_l ())
 227         set_elt_property ("parallel-beam", SCM_BOOL_T);
 228     }
 229 }
 230
 231
 232 Direction
 233 Tuplet_spanner::get_default_dir () const
 234 {
 235   Direction d = UP;
 236   SCM dir_sym =get_elt_property ("dir-forced");
 237   if (isdir_b (dir_sym))
 238     {
 239       d= to_dir (dir_sym);
 240       if (d != CENTER)
 241         return d;
 242     }
 243
 244   d = UP ;
 245   for (SCM s = get_elt_property ("columns"); gh_pair_p (s); s = gh_cdr (s))
 246     {
 247       Score_element * sc = unsmob_element (gh_car (s));
 248       Note_column * nc = dynamic_cast<Note_column*> (sc);
 249       if (nc->dir () < 0)
 250         {
 251           d = DOWN;
 252           break;
 253         }
 254     }
 255
 256   return d;
 257 }
 258
 259 void
 260 Tuplet_spanner::add_beam (Beam *b)
 261 {
 262   add_dependency (b);
 263   Group_interface gi (this, "beams");
 264   gi.add_element (b);
 265 }
 266
 267 void
 268 Tuplet_spanner::add_column (Note_column*n)
 269 {
 270   Group_interface gi (this, "columns");
 271   gi.add_element (n);
 272
 273   add_dependency (n);
 274 }
 275
 276