-/*
- spaceable-grob.cc -- implement Spaceable_grob
-
- source file of the GNU LilyPond music typesetter
-
- (c) 2000--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2000--2012 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 "spaceable-grob.hh"
-#include <cstdio>
-#include <math.h>
+#include <cstdio>
#include "warn.hh"
#include "spring.hh"
-#include "group-interface.hh"
+#include "pointer-group-interface.hh"
+#include "grob.hh"
+#include "paper-column.hh"
+#include "international.hh"
SCM
-Spaceable_grob::get_minimum_distances (Grob*me)
+Spaceable_grob::get_minimum_distances (Grob *me)
{
- return me->get_property ("minimum-distances");
+ return me->get_object ("minimum-distances");
}
/*todo: merge code of spring & rod?
*/
void
-Spaceable_grob::add_rod (Grob *me , Grob * p, Real d)
+Spaceable_grob::add_rod (Grob *me, Grob *p, Real d)
{
// printf ("rod %lf\n", d);
+ if (d < 0)
+ return;
+
+ if (isinf (d))
+ programming_error ("infinite rod");
-
SCM mins = get_minimum_distances (me);
- SCM newdist = scm_make_real (d);
+ SCM newdist = scm_from_double (d);
for (SCM s = mins; scm_is_pair (s); s = scm_cdr (s))
{
SCM dist = scm_car (s);
if (scm_car (dist) == p->self_scm ())
- {
- scm_set_cdr_x (dist, scm_max (scm_cdr (dist),
- newdist));
- return ;
- }
+ {
+ scm_set_cdr_x (dist, scm_max (scm_cdr (dist),
+ newdist));
+ return;
+ }
}
+ if (Paper_column::get_rank (p) < Paper_column::get_rank (me))
+ programming_error ("Adding reverse rod");
+
mins = scm_cons (scm_cons (p->self_scm (), newdist), mins);
- me->set_property ("minimum-distances", mins);
+ me->set_object ("minimum-distances", mins);
}
void
-Spaceable_grob::add_spring (Grob*me, Grob * p, Real d, Real strength)
+Spaceable_grob::add_spring (Grob *me, Grob *other, Spring sp)
{
- // printf ("dist %lf, str %lf\n", d, strength);
- if (d <= 0.0 || strength <= 0.0)
- {
- programming_error ("Adding reverse spring! Setting to unit spring");
- d = 1.0;
- strength = 1.0;
- }
-
- if (isinf (d) || isnan(d)
- || isnan (strength))
- {
- /*
- strength == INF is possible. It means fixed distance.
- */
- programming_error ("Insane distance found.");
- d = 1.0;
- strength = 1.0;
- }
-
-#ifndef NDEBUG
- SCM mins = me->get_property ("ideal-distances");
- for (SCM s = mins; scm_is_pair (s); s = scm_cdr (s))
+ SCM ideal = me->get_object ("ideal-distances");
+
+ ideal = scm_cons (scm_cons (sp.smobbed_copy (), other->self_scm ()), ideal);
+ me->set_object ("ideal-distances", ideal);
+}
+
+Spring
+Spaceable_grob::get_spring (Grob *this_col, Grob *next_col)
+{
+ Spring *spring = 0;
+
+ for (SCM s = this_col->get_object ("ideal-distances");
+ !spring && scm_is_pair (s);
+ s = scm_cdr (s))
{
- Spring_smob * sp = unsmob_spring(scm_car (s));
- if (sp->other_ == p)
- {
- programming_error ("already have that spring");
- return ;
- }
+ if (scm_is_pair (scm_car (s))
+ && unsmob_grob (scm_cdar (s)) == next_col
+ && unsmob_spring (scm_caar (s)))
+ spring = unsmob_spring (scm_caar (s));
}
-#endif
-
- Spring_smob spring;
- spring.strength_ = strength;
- spring.distance_ = d;
- spring.other_ = p;
-
- Group_interface::add_thing (me, ly_symbol2scm ("ideal-distances"), spring.smobbed_copy ());
-}
+ if (!spring)
+ programming_error (to_string ("No spring between column %d and next one",
+ Paper_column::get_rank (this_col)));
-void
-Spaceable_grob::remove_interface (Grob*me)
-{
- me->set_property ("minimum-distances" , SCM_EOL);
- me->set_property ("spacing-wishes", SCM_EOL);
- me->set_property ("ideal-distances", SCM_EOL);
+ return spring ? *spring : Spring ();
}
+ADD_INTERFACE (Spaceable_grob,
+ "A layout object that takes part in the spacing problem.",
-
-ADD_INTERFACE (Spaceable_grob, "spaceable-grob-interface",
- "A layout object that takes part in the spacing problem. "
- ,
- "measure-length spacing-wishes penalty minimum-distances ideal-distances "
- "allow-outside-line left-neighbors right-neighbors");
+ /* properties */
+ "allow-loose-spacing "
+ "ideal-distances "
+ "keep-inside-line "
+ "left-neighbor "
+ "measure-length "
+ "minimum-distances "
+ "right-neighbor "
+ "spacing-wishes "
+ );