/*
- spaceable-grob.cc -- implement Spaceable_grob
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2000--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 2000--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 "spaceable-grob.hh"
#include "pointer-group-interface.hh"
#include "grob.hh"
#include "paper-column.hh"
+#include "international.hh"
SCM
Spaceable_grob::get_minimum_distances (Grob *me)
{
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))
}
void
-Spaceable_grob::add_spring (Grob *me, Grob *other,
- Real distance, Real inverse_strength)
+Spaceable_grob::add_spring (Grob *me, Grob *other, Spring sp)
{
- if (distance <= 0.0 || inverse_strength < 0.0)
- {
- programming_error ("adding reverse spring, setting to unit");
- distance = 1.0;
- inverse_strength = 1.0;
- }
-
- if (isinf (distance) || isnan (distance)
- || isnan (inverse_strength))
- {
- /* strength == INF is possible. It means fixed distance. */
- programming_error ("insane distance found");
- distance = 1.0;
- inverse_strength = 1.0;
- }
-
-#ifndef NDEBUG
- SCM mins = me->get_object ("ideal-distances");
- for (SCM s = mins; scm_is_pair (s); s = scm_cdr (s))
- {
- Spring_smob *sp = unsmob_spring (scm_car (s));
- if (sp->other_ == other)
- {
- programming_error ("already have that spring");
- return;
- }
- }
-#endif
-
- Spring_smob spring;
- spring.inverse_strength_ = inverse_strength;
- spring.distance_ = distance;
- spring.other_ = other;
-
SCM ideal = me->get_object ("ideal-distances");
- ideal = scm_cons (spring.smobbed_copy (), ideal);
+
+ ideal = scm_cons (scm_cons (sp.smobbed_copy (), other->self_scm ()), ideal);
me->set_object ("ideal-distances", ideal);
}
-void
-Spaceable_grob::get_spring (Grob *me, Grob *other, Real *dist, Real *inv_strength)
+Spring
+Spaceable_grob::get_spring (Grob *this_col, Grob *next_col)
{
- for (SCM s = me->get_object ("ideal-distances");
- scm_is_pair (s); s = scm_cdr (s))
+ Spring *spring = 0;
+
+ for (SCM s = this_col->get_object ("ideal-distances");
+ !spring && scm_is_pair (s);
+ s = scm_cdr (s))
{
- Spring_smob *spring = unsmob_spring (scm_car (s));
- if (spring && spring->other_ == other)
- {
- *dist = spring->distance_;
- *inv_strength = spring->inverse_strength_;
- }
+ 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));
}
-}
-void
-Spaceable_grob::remove_interface (Grob *me)
-{
- me->set_object ("minimum-distances", SCM_EOL);
- me->set_object ("spacing-wishes", SCM_EOL);
- me->set_object ("ideal-distances", SCM_EOL);
+ if (!spring)
+ programming_error (to_string ("No spring between column %d and next one",
+ Paper_column::get_rank (this_col)));
+
+ return spring ? *spring : Spring ();
}
-ADD_INTERFACE (Spaceable_grob, "spaceable-grob-interface",
- "A layout object that takes part in the spacing problem. ",
- /* properties */
- "ideal-distances "
- "keep-inside-line "
- "left-neighbors "
- "measure-length "
- "minimum-distances "
- "right-neighbors "
- "spacing-wishes");
+ADD_INTERFACE (Spaceable_grob,
+ "A layout object that takes part in the spacing problem.",
+
+ /* properties */
+ "allow-loose-spacing "
+ "ideal-distances "
+ "keep-inside-line "
+ "left-neighbor "
+ "measure-length "
+ "minimum-distances "
+ "right-neighbor "
+ "spacing-wishes "
+ );