lily/encompass-info.cc

   1 /*
   2   encompass-info.cc -- implement Encompass_info
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--1999 Jan Nieuwenhuizen <janneke@gnu.org>
   7
   8 */
   9 #include "dimension-cache.hh"
  10 #include "proto.hh"
  11 #include "stem.hh"
  12 #include "note-column.hh"
  13 #include "paper-def.hh"
  14 #include "encompass-info.hh"
  15 #include "slur.hh"
  16 #include "staff-symbol.hh"
  17 #include "note-head.hh"
  18 #include "debug.hh"
  19 #include "align-element.hh"
  20
  21 Encompass_info::Encompass_info ()
  22 {
  23 }
  24
  25 Encompass_info::Encompass_info (Note_column const* note_column, Direction dir, Slur const* slur_l)
  26 {
  27   interstaff_f_ = 0;
  28
  29   Stem* stem_l = note_column->stem_l_;
  30   if (!stem_l)
  31     {
  32       warning (_ ("Slur over rest?"));
  33       o_[X_AXIS] = note_column->hpos_f ();
  34       o_[Y_AXIS] = note_column->extent (Y_AXIS)[dir];
  35       return;
  36     }
  37
  38   o_[X_AXIS] = stem_l->hpos_f ();
  39
  40   /*
  41     Simply set x to middle of notehead
  42    */
  43
  44   o_[X_AXIS] -= 0.5 * stem_l->dir_ * note_column->extent (X_AXIS).length ();
  45
  46   if ((stem_l->dir_ == dir)
  47       && !stem_l->extent (Y_AXIS).empty_b ())
  48     {
  49       o_[Y_AXIS] = stem_l->extent (Y_AXIS)[dir];
  50     }
  51   else
  52     {
  53       o_[Y_AXIS] = note_column->extent (Y_AXIS)[dir];
  54     }
  55
  56   /*
  57    leave a gap: slur mustn't touch head/stem
  58    */
  59   o_[Y_AXIS] += dir * slur_l->paper_l ()->get_var ("slur_y_free");
  60
  61   Graphical_element *common = stem_l->common_refpoint (slur_l, Y_AXIS);
  62   Align_element * align = dynamic_cast<Align_element*> (common);
  63   if (align && align->axis() == Y_AXIS)
  64     {
  65       if (align->threshold_interval_[MIN] !=
  66           align->threshold_interval_[MAX])
  67         warning (_ ("minVerticalAlign != maxVerticalAlign: interstaff beams/slurs may be broken"));
  68
  69       interstaff_f_ = align->threshold_interval_[MIN];
  70
  71       Graphical_element const * slur_refpoint = slur_l;
  72       while (slur_refpoint->parent_l  (Y_AXIS) != common)
  73         slur_refpoint = slur_refpoint->parent_l (Y_AXIS);
  74
  75       Graphical_element const * note_refpoint = note_column;
  76       while (note_refpoint->parent_l (Y_AXIS) != common)
  77         note_refpoint = note_refpoint->parent_l (Y_AXIS);
  78
  79       int slur_prio =
  80         align->get_priority ((Score_element*) dynamic_cast<Score_element const*> (slur_refpoint));
  81       int stem_prio =
  82         align->get_priority ((Score_element*) dynamic_cast<Score_element  const *> (note_refpoint));
  83
  84       /*
  85         our staff is lower -> interstaff_f_ *= -1
  86        */
  87
  88       if (slur_prio < stem_prio)
  89         interstaff_f_ *= -1;
  90       o_[Y_AXIS] += interstaff_f_;
  91     }
  92 }