lily/cross-staff.cc

   1 #include "cross-staff.hh"
   2 #include "item.hh"
   3 #include "align-interface.hh"
   4 #include "spanner.hh"
   5 #include "warn.hh"
   6 #include "paper-def.hh"
   7
   8
   9 /*
  10   JUNKME
  11  */
  12 Real
  13 calc_interstaff_dist (Item  *item, Spanner  *span)
  14 {
  15   Real interstaff = 0.0;
  16   Grob *common = item->common_refpoint (span, Y_AXIS);
  17
  18
  19   if (Align_interface::has_interface (common) && Align_interface::axis(common) == Y_AXIS)
  20     {
  21       SCM threshold = common->get_grob_property ("forced-distance");
  22       interstaff = 1.0;
  23       if (!gh_number_p (threshold))
  24         warning (_ ("not a forced distance; cross-staff spanners may be broken"));
  25       else
  26         interstaff *= gh_scm2double (threshold);
  27
  28       Grob  * span_refpoint = span;
  29       while (span_refpoint->parent_l  (Y_AXIS) != common)
  30         span_refpoint = span_refpoint->parent_l (Y_AXIS);
  31
  32       Grob  * note_refpoint = item;
  33       while (note_refpoint->parent_l (Y_AXIS) != common)
  34         note_refpoint = note_refpoint->parent_l (Y_AXIS);
  35
  36       int span_prio =
  37         Align_interface::get_count (common,(Grob*) dynamic_cast<Grob *> (span_refpoint));
  38       int item_prio =
  39         Align_interface::get_count (common,(Grob*) dynamic_cast<Grob   *> (note_refpoint));
  40
  41       /*
  42         our staff is lower -> interstaff *= -1
  43        */
  44
  45       if (span_prio < item_prio)
  46         interstaff *= -1;
  47       return interstaff;
  48     }
  49   else return 0.0;
  50 }
  51