Imported Upstream version 2.14.2

[lilypond.git] / lily / staff-symbol-referencer.cc

diff --git a/lily/staff-symbol-referencer.cc b/lily/staff-symbol-referencer.cc
index 367bed131dcbe6f333dea910387f22bbf19b5288..2939e0c0614fdb035fe5a62409c4708f7bbf03ee 100644 (file)
--- a/lily/staff-symbol-referencer.cc
+++ b/lily/staff-symbol-referencer.cc
@@ -1,15 +1,26 @@
 /*
-  staff-symbol-referencer.cc -- implement Staff_symbol_referencer
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1999--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 1999--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  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/>.
 */
 
 #include "staff-symbol-referencer.hh"
 
-
 #include "staff-symbol.hh"
+#include "grob.hh"
 #include "output-def.hh"
 #include "libc-extension.hh"
 
@@ -20,29 +31,17 @@ Staff_symbol_referencer::line_count (Grob *me)
   return st ? Staff_symbol::line_count (st) : 0;
 }
 
-bool
-Staff_symbol_referencer::on_line (Grob *me)
-{
-  return on_line (me, (int) rint (get_position (me)));
-}
-
-bool
-Staff_symbol_referencer::on_staff_line (Grob *me)
-{
-  return on_staff_line (me, (int) rint (get_position (me)));
-}
-
 bool
 Staff_symbol_referencer::on_line (Grob *me, int pos)
 {
-  int sz = line_count (me) - 1;
-  return ((pos + sz) % 2) == 0;
+  Grob *st = get_staff_symbol (me);
+  return st ? Staff_symbol::on_line (st, pos) : false;
 }
 
 bool
 Staff_symbol_referencer::on_staff_line (Grob *me, int pos)
 {
-  return on_line (me, pos) && fabs (pos) <= 2 * staff_radius (me);
+  return on_line (me, pos) && abs (pos) <= 2 * staff_radius (me);
 }
 
 Grob *
@@ -70,7 +69,7 @@ Staff_symbol_referencer::line_thickness (Grob *me)
   Grob *st = get_staff_symbol (me);
   if (st)
     return Staff_symbol::get_line_thickness (st);
-  return me->layout ()->get_dimension (ly_symbol2scm ("linethickness"));
+  return me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
 }
 
 Real
@@ -82,9 +81,9 @@ Staff_symbol_referencer::get_position (Grob *me)
   if (st && c)
     {
       Real y = me->relative_coordinate (c, Y_AXIS)
-       - st->relative_coordinate (c, Y_AXIS);
-
-      p += 2.0 * y / Staff_symbol::staff_space (st);
+              - st->relative_coordinate (c, Y_AXIS);
+      Real space = Staff_symbol::staff_space (st);
+      p = (space == 0) ? 0 : 2.0 * y / space;
       return p;
     }
   else if (!st)
@@ -92,6 +91,23 @@ Staff_symbol_referencer::get_position (Grob *me)
   return robust_scm2double (me->get_property ("staff-position"), p);
 }
 
+
+Interval
+Staff_symbol_referencer::extent_in_staff (Grob *me)
+{
+  Grob *st = get_staff_symbol (me);
+  Grob *c = st ? me->common_refpoint (st, Y_AXIS) : 0;
+
+  Interval retval;
+  if (st && c)
+    {
+      retval  = me->extent (c, Y_AXIS)
+       - st->relative_coordinate (c, Y_AXIS);
+    }
+
+  return retval;
+}
+
 int
 Staff_symbol_referencer::get_rounded_position (Grob *me)
 {
@@ -110,7 +126,6 @@ Staff_symbol_referencer::callback (SCM smob)
     {
       Real space = Staff_symbol_referencer::staff_space (me);
       off = scm_to_double (pos) * space / 2.0;
-      me->set_property ("staff-position", scm_from_int (0));
     }
 
   return scm_from_double (off);
@@ -138,7 +153,6 @@ Staff_symbol_referencer::set_position (Grob *me, Real p)
       oldpos = get_position (me);
     }
 
-  
   Real ss = Staff_symbol_referencer::staff_space (me);
   me->translate_axis ((p  - oldpos) * ss * 0.5, Y_AXIS);
 }
@@ -157,12 +171,19 @@ compare_position (Grob *const &a, Grob *const &b)
               - Staff_symbol_referencer::get_position ((Grob *) b));
 }
 
-ADD_INTERFACE (Staff_symbol_referencer, "staff-symbol-referencer-interface",
-              "An object whose Y position is meant relative to a staff "
-              "symbol. "
-              "These usually have @code{Staff_symbol_referencer::callback} "
-              "in their @code{Y-offset-callbacks}. ",
+bool
+position_less (Grob *const &a, Grob *const &b)
+{
+  return Staff_symbol_referencer::get_position (a)
+    < Staff_symbol_referencer::get_position (b);
+}
 
-              /* properties */
-              "staff-position");
+ADD_INTERFACE (Staff_symbol_referencer,
+              "An object whose Y@tie{}position is meant relative to a staff"
+              " symbol.  These usually"
+              " have @code{Staff_symbol_referencer::callback} in their"
+              " @code{Y-offset-callbacks}.",
 
+              /* properties */
+              "staff-position "
+              );