/*
- melody-spanner.cc -- implement Melody_spanner
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2005--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 2005--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 "melody-spanner.hh"
let's take item for now.
*/
-
/*
Interpolate stem directions for neutral stems.
*/
-MAKE_SCHEME_CALLBACK(Melody_spanner,calc_neutral_stem_direction, 1);
+MAKE_SCHEME_CALLBACK (Melody_spanner, calc_neutral_stem_direction, 1);
SCM
Melody_spanner::calc_neutral_stem_direction (SCM smob)
{
Grob *stem = unsmob_grob (smob);
- Grob *me = unsmob_grob (stem->get_object ("melody-spanner"));
+ Grob *me = unsmob_grob (stem->get_object ("melody-spanner"));
if (!me || !me->is_live ())
- return SCM_UNSPECIFIED;
-
+ return scm_from_int (DOWN);
+
extract_grob_set (me, "stems", stems);
- Array<Direction> dirs;
- for (int i = 0; i < stems.size (); i++)
- {
- dirs.push (to_dir (stems[i]->get_property ("default-direction")));
- }
+ vector<Direction> dirs;
+ for (vsize i = 0; i < stems.size (); i++)
+ dirs.push_back (to_dir (stems[i]->get_property ("default-direction")));
- int last_nonneutral = -1;
- int next_nonneutral = 0;
- while (next_nonneutral < dirs.size() && !dirs[next_nonneutral])
- next_nonneutral ++;
+ vsize last_nonneutral = VPOS;
+ vsize next_nonneutral = 0;
+ while (next_nonneutral != VPOS && next_nonneutral < dirs.size ()
+ && !dirs[next_nonneutral])
+ next_nonneutral++;
- while (last_nonneutral < dirs.size () - 1)
+ SCM retval = SCM_EOL;
+ while (last_nonneutral == VPOS || last_nonneutral + 1 < dirs.size ())
{
Direction d1 = CENTER;
Direction d2 = CENTER;
- if (last_nonneutral >= 0)
- d1 = dirs[last_nonneutral];
+ if (last_nonneutral != VPOS)
+ d1 = dirs[last_nonneutral];
if (next_nonneutral < dirs.size ())
- d2 = dirs[next_nonneutral];
+ d2 = dirs[next_nonneutral];
Direction total = CENTER;
if (d1 && d1 == d2)
- total = d1;
+ total = d1;
else if (d1 && !d2)
- total = d1;
+ total = d1;
else if (d2 && !d1)
- total = d2;
+ total = d2;
else
- total = to_dir (me->get_property ("neutral-direction"));
-
- for (int i = last_nonneutral + 1; i < next_nonneutral; i++)
- stems[i]->set_property ("neutral-direction", scm_from_int (total));
+ total = to_dir (me->get_property ("neutral-direction"));
+ for (vsize i = last_nonneutral + 1; i < next_nonneutral; i++)
+ {
+ if (stems[i] == stem)
+ retval = scm_from_int (total);
+ else
+ stems[i]->set_property ("neutral-direction", scm_from_int (total));
+ }
last_nonneutral = next_nonneutral;
while (last_nonneutral < dirs.size ()
- && dirs[last_nonneutral])
- last_nonneutral ++;
+ && dirs[last_nonneutral])
+ last_nonneutral++;
next_nonneutral = last_nonneutral;
- last_nonneutral --;
+ last_nonneutral--;
while (next_nonneutral < dirs.size ()
- && !dirs[next_nonneutral])
- next_nonneutral ++;
+ && !dirs[next_nonneutral])
+ next_nonneutral++;
}
- me->suicide ();
- return SCM_UNSPECIFIED;
+ return retval;
}
void
stem->set_property ("neutral-direction", Melody_spanner::calc_neutral_stem_direction_proc);
}
-ADD_INTERFACE (Melody_spanner, "melody-spanner-interface",
- "Context dependent typesetting decisions.",
+ADD_INTERFACE (Melody_spanner,
+ "Context dependent typesetting decisions.",
- "stems "
- "neutral-direction ");
+ /* properties */
+ "stems "
+ "neutral-direction "
+ );
-