release: 1.2.15

[lilypond.git] / lily / stem-info.cc

diff --git a/lily/stem-info.cc b/lily/stem-info.cc
index a0914f000b75248dbd272d183100195917d0fbef..4a9e06e05ed3f910e5a074ba0a357139203467cd 100644 (file)
--- a/lily/stem-info.cc
+++ b/lily/stem-info.cc
@@ -9,41 +9,39 @@
 
 #include "proto.hh"
 #include "misc.hh"
-#include "debug.hh"
+#include "cross-staff.hh"
 
 #include "stem.hh"
 #include "paper-def.hh"
 #include "lookup.hh"
 #include "stem-info.hh"
 #include "beam.hh"
-#include "staff-symbol.hh"
+
 
 Stem_info::Stem_info ()
 {
 }
 
-Stem_info::Stem_info (Stem*s)
+
+/*
+  FIXME: y dims should not be in internote.
+ */
+Stem_info::Stem_info (Stem*s, int mult)
 {
+  mult_i_ =mult;
   stem_l_ = s;
   x_ = stem_l_->hpos_f ();
   dir_ = stem_l_->dir_;
   SCM bd = stem_l_->remove_elt_property (beam_dir_scm_sym);
-  beam_dir_ = gh_scm2int (SCM_CDR(bd));
   
-  mult_i_ = stem_l_->mult_i_;
+  beam_dir_ = gh_scm2int (SCM_CDR(bd));
   interstaff_f_ = 0;
 
   Paper_def* paper_l = stem_l_->paper_l ();
   Real internote_f = stem_l_->staff_line_leading_f ()/2;
   Real interbeam_f = paper_l->interbeam_f (mult_i_);
-  Real beam_f = paper_l->beam_thickness_f ();
+  Real beam_f = paper_l->get_realvar (beam_thickness_scm_sym);;
          
-  {
-      static int i = 1;
-      DOUT << "******" << i++ << "******\n" 
-          << "begin_f: " << stem_l_->stem_begin_f () * dir_ 
-          << "\nchord_f/i: " << stem_l_->chord_start_f () * dir_ / internote_f << '\n';
-  }
 
   // strangely enough, dim(chord_start_f) == pt (and not internote!)
   idealy_f_ = stem_l_->chord_start_f () / internote_f;
@@ -53,12 +51,15 @@ Stem_info::Stem_info (Stem*s)
 
   // for simplicity, we calculate as if dir == UP
   idealy_f_ *= beam_dir_;
-  
+
+  bool grace_b = stem_l_->get_elt_property (grace_scm_sym) != SCM_BOOL_F;
+
   int stem_max = (int)rint(paper_l->get_var ("stem_max"));
-  Real min_stem_f = paper_l->get_var (String ("minimum_stem_length")
-                                    + to_str (mult_i_ <? stem_max));
-  Real stem_f = paper_l->get_var (String ("stem_length")
-                                + to_str (mult_i_ <? stem_max));
+  String type_str = grace_b ? "grace_" : "";
+  Real min_stem_f = paper_l->get_var (type_str + "minimum_stem_length"
+                                     + to_str (mult_i_ <? stem_max)) * internote_f;
+  Real stem_f = paper_l->get_var (type_str + "stem_length"
+                                 + to_str (mult_i_ <? stem_max))* internote_f;
 
   if (!beam_dir_ || (beam_dir_ == dir_))
     /* normal beamed stem */
@@ -74,16 +75,29 @@ Stem_info::Stem_info (Stem*s)
       idealy_f_ += stem_f;
       miny_f_ += min_stem_f;
 
-      // lowest beam of (UP) beam must never be lower than second staffline
-      miny_f_ = miny_f_ >? (- 2 * internote_f - beam_f
-       + (mult_i_ > 0) * beam_f + interbeam_f * (mult_i_ - 1));
+      /*
+       lowest beam of (UP) beam must never be lower than second staffline
+
+       Hmm, reference (Wanske?)
+
+       Although this (additional) rule is probably correct,
+       I expect that highest beam (UP) should also never be lower
+       than middle staffline, just as normal stems.
+       
+      */
+      if (!grace_b)
+       {
+         //highest beam of (UP) beam must never be lower than middle staffline
+         miny_f_ = miny_f_ >? 0;
+         //lowest beam of (UP) beam must never be lower than second staffline
+         miny_f_ = miny_f_ >? (- 2 * internote_f - beam_f
+                               + (mult_i_ > 0) * beam_f + interbeam_f * (mult_i_ - 1));
+       }
     }
   else
     /* knee */
     {
       idealy_f_ -= beam_f;
-      // idealy_f_ -= (mult_i_ - 1) * interbeam_f;
-      // idealy_f_ += (mult_i_ - stem_l_->flag_i_ >? 0) * interbeam_f;
       maxy_f_ = idealy_f_;
       miny_f_ = -INT_MAX;
 
@@ -96,34 +110,15 @@ Stem_info::Stem_info (Stem*s)
   miny_f_ /= internote_f;
   maxy_f_ /= internote_f;
 
-  DOUT << "dir_: " << dir_ << '\n';
-  DOUT << "mult_i_: " << mult_i_ << '\n';
-  DOUT << "idealy_f_: " << idealy_f_ << '\n';
-  DOUT << "miny_f_: " << miny_f_ << '\n';
-  DOUT << "maxy_f_: " << maxy_f_ << '\n';
-
   idealy_f_ = maxy_f_ <? idealy_f_;
   idealy_f_ = miny_f_ >? idealy_f_;
 
   // interstaff beam
-  Beam* beam_l_ = stem_l_->beam_l_;
-  if (beam_l_->sinfo_.size ()
-      && stem_l_->staff_symbol_l () != beam_l_->sinfo_[0].stem_l_->staff_symbol_l ())
-    {
-       {
-         //      warning (_ ("invalid dimension cache: guessing staff position"));
-         if (beam_l_->vertical_align_drul_[MIN] != 
-             beam_l_->vertical_align_drul_[MAX])
-           warning (_ ("minVerticalAlign != maxVerticalAlign: interstaff slurs may be broken"));
-         interstaff_f_ = beam_l_->vertical_align_drul_[MIN] / internote_f;
-         // urg, guess staff order:
-         // if our stem ends higher, our staff is probably lower...
-         if (idealy_f_ * beam_dir_ > beam_l_->sinfo_[0].idealy_f_ * beam_dir_)
-           interstaff_f_ *= -1;
-       }
-      idealy_f_ += interstaff_f_ * beam_dir_;
-      miny_f_ += interstaff_f_ * beam_dir_;
-      maxy_f_ += interstaff_f_ * beam_dir_;
-    }
+  Beam* beam_l = stem_l_->beam_l_;
+  
+  Real is = calc_interstaff_dist (stem_l_, beam_l);
+  idealy_f_ += is* beam_dir_;
+  miny_f_ += is * beam_dir_;
+  maxy_f_ += is * beam_dir_;
 }