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
  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 (SCM s)
  26   : Spanner (s)
  27 {
  28   set_elt_pointer ("beams", SCM_EOL);
  29   set_elt_pointer ("columns", SCM_EOL);
  30
  31   // ugh.
  32   set_elt_property ("delta-y", gh_int2scm (0));
  33 }
  34
  35 /*
  36   TODO.
  37  */
  38
  39 GLUE_SCORE_ELEMENT(Tuplet_spanner,brew_molecule);
  40 SCM
  41 Tuplet_spanner::member_brew_molecule () const
  42 {
  43   Molecule  mol;
  44
  45   // Default behaviour: number always, bracket when no beam!
  46   bool par_beam = to_boolean (get_elt_property ("parallel-beam"));
  47   bool bracket_visibility = !par_beam;
  48   bool number_visibility = true;
  49
  50   SCM bracket = get_elt_property ("tuplet-bracket-visibility");
  51   if (gh_boolean_p (bracket))
  52     {
  53       bracket_visibility = gh_scm2bool (bracket);
  54     }
  55   else if (bracket == ly_symbol2scm ("if-no-beam"))
  56     bracket_visibility = !par_beam;
  57
  58   SCM numb = get_elt_property ("tuplet-number-visibility");
  59   if (gh_boolean_p (numb))
  60     {
  61       number_visibility = gh_scm2bool (numb);
  62     }
  63   else if (bracket == ly_symbol2scm ("if-no-beam"))
  64     number_visibility = !par_beam;
  65
  66   if (gh_pair_p (get_elt_pointer ("columns")))
  67     {
  68       Link_array<Note_column> column_arr=
  69         Pointer_group_interface__extract_elements (this, (Note_column*)0, "columns");
  70
  71       Real ncw = column_arr.top ()->extent(X_AXIS).length ();
  72       Real w = spanner_length () + ncw;
  73
  74
  75       Real staff_space = paper_l ()->get_var ("interline");
  76       Direction dir = Directional_element_interface (this).get ();
  77       Real dy = gh_scm2double (get_elt_property ("delta-y"));
  78       SCM number = get_elt_property ("text");
  79       if (gh_string_p (number) && number_visibility)
  80         {
  81           Molecule
  82             num (lookup_l ()->text ("italic",
  83                                     ly_scm2string (number), paper_l ()));
  84           num.align_to (X_AXIS, CENTER);
  85           num.translate_axis (w/2, X_AXIS);
  86           num.align_to (Y_AXIS, CENTER);
  87           num.translate_axis (dir * staff_space, Y_AXIS);
  88
  89           num.translate_axis (dy/2, Y_AXIS);
  90
  91           mol.add_molecule (num);
  92         }
  93
  94       if (bracket_visibility)
  95         {
  96           SCM ss = paper_l ()->get_scmvar ("staffspace");
  97           SCM lt =  paper_l ()->get_scmvar ("stafflinethickness");
  98
  99           SCM thick = get_elt_property ("thick");
 100           SCM gap = get_elt_property ("number-gap");
 101
 102           SCM at =gh_list(ly_symbol2scm ("tuplet"),
 103                           ss,
 104                           scm_product (gap, ss),
 105                           gh_double2scm (w),
 106                           gh_double2scm (dy),
 107                           scm_product (thick, lt),
 108                           gh_int2scm (dir),
 109                           SCM_UNDEFINED);
 110
 111           Box b;
 112           mol.add_molecule (Molecule (b, at));
 113         }
 114     }
 115   return mol.create_scheme();
 116 }
 117
 118
 119
 120
 121 /*
 122   use first -> last note for slope, and then correct for disturbing
 123   notes in between.  */
 124 void
 125 Tuplet_spanner::calc_position_and_height (Real *offset, Real * dy) const
 126 {
 127   Link_array<Note_column> column_arr=
 128     Pointer_group_interface__extract_elements (this, (Note_column*)0, "columns");
 129
 130
 131   Score_element * common = common_refpoint (get_elt_pointer ("columns"), Y_AXIS);
 132
 133   Direction d = Directional_element_interface (this).get ();
 134
 135   /*
 136     Use outer non-rest columns to determine slope
 137    */
 138   int l = 0;
 139   while (l <column_arr.size() && column_arr[l]->rest_b())
 140     l ++;
 141
 142   int r = column_arr.size ()- 1;
 143   while (r >= l && column_arr[r]->rest_b())
 144     r--;
 145
 146   if (l < r)
 147     {
 148       *dy = column_arr[r]->extent (Y_AXIS) [d] + column_arr[r]->relative_coordinate (common, Y_AXIS)
 149         - column_arr[l]->extent (Y_AXIS) [d] - column_arr[l]->relative_coordinate (common, Y_AXIS);
 150     }
 151   else
 152     * dy = 0;
 153
 154
 155   *offset = - d * infinity_f;
 156
 157   if (!column_arr.size ())
 158     return;
 159
 160   Real x0 = column_arr[0]->relative_coordinate (0, X_AXIS);
 161   Real x1 = column_arr.top ()->relative_coordinate (0, X_AXIS);
 162
 163   Real factor = column_arr.size () > 1 ? 1/(x1 - x0) : 1.0;
 164
 165   for (int i = 0; i < column_arr.size ();  i++)
 166     {
 167       Real notey = column_arr[i]->extent (Y_AXIS)[d] +
 168         column_arr[i]->relative_coordinate (common, Y_AXIS)
 169         ;
 170       Real x = column_arr[i]->relative_coordinate (0, X_AXIS) - x0;
 171       Real tuplety =  *dy * x * factor;
 172
 173       if (notey * d > (*offset + tuplety) * d)
 174         *offset = notey - tuplety;
 175     }
 176 }
 177
 178 /*
 179   use first -> last note for slope,
 180 */
 181 void
 182 Tuplet_spanner::calc_dy (Real * dy) const
 183 {
 184   Link_array<Note_column> column_arr=
 185     Pointer_group_interface__extract_elements (this, (Note_column*)0, "columns");
 186
 187
 188   Direction d = Directional_element_interface (this).get ();
 189   *dy = column_arr.top ()->extent (Y_AXIS) [d]
 190     - column_arr[0]->extent (Y_AXIS) [d];
 191 }
 192
 193 GLUE_SCORE_ELEMENT(Tuplet_spanner,after_line_breaking);
 194 SCM
 195 Tuplet_spanner::member_after_line_breaking ()
 196 {
 197   Link_array<Note_column> column_arr=
 198     Pointer_group_interface__extract_elements (this, (Note_column*)0, "columns");
 199
 200   if (!column_arr.size ())
 201     {
 202       suicide ();
 203       return SCM_UNDEFINED;
 204     }
 205
 206   Direction d = Directional_element_interface (this).get ();
 207   if (!d)
 208     {
 209       d = get_default_dir ();
 210       Directional_element_interface (this).set (d);
 211
 212     }
 213   Real dy, offset;
 214
 215   calc_position_and_height  (&offset,&dy);
 216
 217   set_elt_property ("delta-y", gh_double2scm (dy));
 218
 219   translate_axis (offset, Y_AXIS);
 220
 221   if (scm_ilength (get_elt_pointer ("beams")) == 1)
 222     {
 223       SCM bs = get_elt_pointer ("beams");
 224       Score_element *b = unsmob_element (gh_car (bs));
 225       Beam * beam_l = dynamic_cast<Beam*> (b);
 226       if (!broken_b ()
 227           && get_bound (LEFT)->column_l () == beam_l->get_bound (LEFT)->column_l ()
 228           && get_bound (RIGHT)->column_l () == beam_l->get_bound (RIGHT)->column_l ())
 229         set_elt_property ("parallel-beam", SCM_BOOL_T);
 230     }
 231   return SCM_UNDEFINED;
 232 }
 233
 234
 235 Direction
 236 Tuplet_spanner::get_default_dir () const
 237 {
 238   Direction d = UP;
 239   SCM dir_sym =get_elt_property ("dir-forced");
 240   if (isdir_b (dir_sym))
 241     {
 242       d= to_dir (dir_sym);
 243       if (d != CENTER)
 244         return d;
 245     }
 246
 247   d = UP ;
 248   for (SCM s = get_elt_pointer ("columns"); gh_pair_p (s); s = gh_cdr (s))
 249     {
 250       Score_element * sc = unsmob_element (gh_car (s));
 251       Note_column * nc = dynamic_cast<Note_column*> (sc);
 252       if (nc->dir () < 0)
 253         {
 254           d = DOWN;
 255           break;
 256         }
 257     }
 258
 259   return d;
 260 }
 261
 262 void
 263 Tuplet_spanner::add_beam (Beam *b)
 264 {
 265   add_dependency (b);
 266   Pointer_group_interface gi (this, "beams");
 267   gi.add_element (b);
 268 }
 269
 270 void
 271 Tuplet_spanner::add_column (Note_column*n)
 272 {
 273   Pointer_group_interface gi (this, "columns");
 274   gi.add_element (n);
 275
 276   add_dependency (n);
 277
 278   add_bound_item (this, n);
 279 }
 280
 281