Fix page-count with systems-per-page.

[lilypond.git] / lily / slur-scoring.cc

diff --git a/lily/slur-scoring.cc b/lily/slur-scoring.cc
index bb2b1f3b2bafed2593fd0ac688b3cecef440cb9e..0e8c60cbcb61fbaa73e8b6b5ac85005761547782 100644 (file)
--- a/lily/slur-scoring.cc
+++ b/lily/slur-scoring.cc
@@ -1,10 +1,21 @@
 /*
-  slur-scoring.cc -- Score based slur formatting
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
-
-  (c) 1996--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1996--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   Jan Nieuwenhuizen <janneke@gnu.org>
+
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
@@ -67,18 +78,24 @@ Slur_score_state::~Slur_score_state ()
 }
 
 /*
-  copy slur dir forwards across line break.
+  If a slur is broken across a line break, the direction
+  of the post-break slur must be the same as the pre-break
+  slur.
 */
-void
-Slur_score_state::set_next_direction ()
+Direction
+Slur_score_state::slur_direction () const
 {
-  if (extremes_[RIGHT].note_column_)
-    return;
+  Grob *left_neighbor = slur_->broken_neighbor (LEFT);
 
-  if (Grob *neighbor = slur_->broken_neighbor (RIGHT))
-    {
-      set_grob_direction (neighbor, dir_);
-    }
+  if (left_neighbor && left_neighbor->is_live ())
+    return get_grob_direction (left_neighbor);
+
+  Direction dir = get_grob_direction (slur_);
+
+  if (Grob *right_neighbor = slur_->broken_neighbor (RIGHT))
+    set_grob_direction (right_neighbor, dir);
+
+  return dir;
 }
 
 Encompass_info
@@ -116,7 +133,7 @@ Slur_score_state::get_encompass_info (Grob *col) const
     {
       ei.stem_ = stem->extent (common_[Y_AXIS], Y_AXIS)[dir_];
       if (Grob *b = Stem::get_beam (stem))
-       ei.stem_ += stem_dir * 0.5 * Beam::get_thickness (b);
+       ei.stem_ += stem_dir * 0.5 * Beam::get_beam_thickness (b);
 
       Interval x = stem->extent (common_[X_AXIS], X_AXIS);
       ei.x_ = x.is_empty ()
@@ -204,7 +221,7 @@ Slur_score_state::fill (Grob *me)
   Real lt = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
   thickness_ = robust_scm2double (me->get_property ("thickness"), 1.0) * lt;
 
-  dir_ = get_grob_direction (me);
+  dir_ = slur_direction ();
   parameters_.fill (me);
 
   extract_grob_set (me, "note-columns", columns);
@@ -266,8 +283,6 @@ Slur_score_state::fill (Grob *me)
     = (extremes_[LEFT].stem_ && Stem::get_beam (extremes_[LEFT].stem_))
     || (extremes_[RIGHT].stem_ && Stem::get_beam (extremes_[RIGHT].stem_));
 
-  set_next_direction ();
-
   if (is_broken_)
     musical_dy_ = 0.0;
 }