-/*
- spaceable-grob.cc -- implement Spaceable_grob
-
+/*
+ spaceable-grob.cc -- implement Spaceable_grob
+
source file of the GNU LilyPond music typesetter
-
- (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 2000--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#include "spaceable-grob.hh"
-#include "grob.hh"
+
+#include <cstdio>
+
#include "warn.hh"
+#include "spring.hh"
+#include "pointer-group-interface.hh"
+#include "grob.hh"
+#include "paper-column.hh"
SCM
-Spaceable_grob::get_minimum_distances (Grob*me)
+Spaceable_grob::get_minimum_distances (Grob *me)
{
- return me->get_grob_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 = gh_double2scm (d);
- for (SCM s = mins; gh_pair_p (s); s = ly_cdr (s))
+ SCM newdist = scm_from_double (d);
+ for (SCM s = mins; scm_is_pair (s); s = scm_cdr (s))
{
- SCM dist = ly_car (s);
- if (ly_car (dist) == p->self_scm ())
+ SCM dist = scm_car (s);
+ if (scm_car (dist) == p->self_scm ())
{
- gh_set_cdr_x (dist, scm_max (ly_cdr (dist),
- newdist));
- return ;
+ scm_set_cdr_x (dist, scm_max (scm_cdr (dist),
+ newdist));
+ return;
}
}
- mins = gh_cons (gh_cons (p->self_scm (), newdist), mins);
- me->set_grob_property ("minimum-distances", mins);
+ 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_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,
+ Real distance, Real inverse_strength)
{
- SCM mins = me->get_grob_property ("ideal-distances");
-
-
- SCM newdist= gh_double2scm (d);
- for (SCM s = mins; gh_pair_p (s); s = ly_cdr (s))
+ if (distance <= 0.0 || inverse_strength < 0.0)
{
- SCM dist = ly_car (s);
- if (ly_car (dist) == p->self_scm ())
+ 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 ;
+ return;
}
}
- SCM newstrength= gh_double2scm (strength);
-
- mins = gh_cons (gh_cons (p->self_scm (), gh_cons (newdist, newstrength)), mins);
- me->set_grob_property ("ideal-distances", mins);
-}
+#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);
+ me->set_object ("ideal-distances", ideal);
+}
void
-Spaceable_grob::remove_interface (Grob*me)
+Spaceable_grob::get_spring (Grob *me, Grob *other, Real *dist, Real *inv_strength)
{
- me->remove_grob_property ("minimum-distances");
- me->remove_grob_property ("ideal-distances");
+ for (SCM s = me->get_object ("ideal-distances");
+ 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_;
+ }
+ }
}
-
void
-Spaceable_grob::set_interface (Grob*me)
+Spaceable_grob::remove_interface (Grob *me)
{
- me->set_interface (ly_symbol2scm ("spaceable-grob-interface"));
+ me->set_object ("minimum-distances", SCM_EOL);
+ me->set_object ("spacing-wishes", SCM_EOL);
+ me->set_object ("ideal-distances", SCM_EOL);
}
+
+ADD_INTERFACE (Spaceable_grob,
+ "A layout object that takes part in the spacing problem. ",
+
+
+ /* properties */
+ "allow-loose-spacing "
+ "ideal-distances "
+ "keep-inside-line "
+ "left-neighbors "
+ "measure-length "
+ "minimum-distances "
+ "right-neighbors "
+ "spacing-wishes");
+