/*
- staff-symbol.cc -- implement Staff_symbol
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--2007 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.hh"
return ly_interval2scm (y_ext);
}
+bool
+Staff_symbol::on_line (Grob *me, int pos)
+{
+ SCM line_positions = me->get_property ("line-positions");
+ if (scm_is_pair (line_positions))
+ {
+ Real min_line = HUGE_VAL;
+ Real max_line = -HUGE_VAL;
+ for (SCM s = line_positions; scm_is_pair (s); s = scm_cdr (s))
+ {
+ Real current_line = scm_to_double (scm_car (s));
+ if (pos == current_line)
+ return true;
+ if (current_line > max_line)
+ max_line = current_line;
+ if (current_line < min_line)
+ min_line = current_line;
+
+ }
+ if (pos < min_line)
+ return (( (int) (rint (pos - min_line)) % 2) == 0);
+ if (pos > max_line)
+ return (( (int) (rint (pos - max_line)) % 2) == 0);
-
+ return false;
+ }
+ else
+ return ((abs (pos + line_count (me)) % 2) == 1);
+}
ADD_INTERFACE (Staff_symbol,
"This spanner draws the lines of a staff. A staff symbol"