source file of the GNU LilyPond music typesetter
- (c) 1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
- Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1998--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+ Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
+#include "hara-kiri-group-spanner.hh"
+
+#include "paper-column.hh"
+#include "pointer-group-interface.hh"
#include "axis-group-interface.hh"
#include "spanner.hh"
-#include "hara-kiri-group-spanner.hh"
-#include "debug.hh"
+#include "warn.hh"
#include "item.hh"
-void
-Hara_kiri_group_spanner::set_interface (Score_element*me)
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, y_extent, 1);
+SCM
+Hara_kiri_group_spanner::y_extent (SCM smob)
{
- me->set_elt_pointer ("items-worth-living", SCM_EOL);
-}
-
-void
-Hara_kiri_group_spanner::add_interesting_item (Score_element* me,Item* n)
-{
- me->add_dependency (n);
- Pointer_group_interface (me, "items-worth-living").add_element (n);
-
+ Grob *me = unsmob_grob (smob);
+ consider_suicide (me);
+ return Axis_group_interface::generic_group_extent (me, Y_AXIS);
}
void
-Hara_kiri_group_spanner::consider_suicide(Score_element*me)
+Hara_kiri_group_spanner::consider_suicide (Grob *me)
{
- SCM worth = me->get_elt_pointer ("items-worth-living");
- if (gh_pair_p (worth))
+ Spanner *sp = dynamic_cast<Spanner *> (me);
+ if (!to_boolean (me->get_property ("remove-empty")))
return ;
- Link_array<Score_element> childs = Axis_group_interface (me).get_children ();
- for (int i = 0; i < childs.size (); i++)
- childs[i]->suicide ();
+ extract_grob_set (me, "items-worth-living", worth);
+ if (worth.size ())
+ return;
+
+ bool remove_first = to_boolean (me->get_property ("remove-first"));
+ if (!remove_first
+ && ((sp->original () && broken_spanner_index (sp) == 0)
+ || Paper_column::get_rank (sp->get_bound (LEFT)->get_column ())
+ == 0))
+ return;
+ vector<Grob*> childs;
+ Axis_group_interface::get_children (me, &childs);
+ for (vsize i = 0; i < childs.size (); i++)
+ childs[i]->suicide ();
/*
very appropriate name here :-)
- */
+ */
me->suicide ();
}
-
-
/*
We can't rely on offsets and dimensions of elements in a hara-kiri
group. Use a callback to make sure that hara-kiri has been done
before asking for offsets. */
-Real
-Hara_kiri_group_spanner::force_hara_kiri_callback (Score_element *elt, Axis a)
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, after_line_breaking, 1);
+SCM
+Hara_kiri_group_spanner::after_line_breaking (SCM smob)
{
- while (elt
- && to_boolean (elt->get_elt_property ("hara-kiri-interface")))
- elt = elt->parent_l(a);
+ Grob *me = unsmob_grob (smob);
+ consider_suicide (me);
+ return SCM_UNSPECIFIED;
+}
- if (elt)
- {
- Hara_kiri_group_spanner::consider_suicide (elt);
- }
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, force_hara_kiri_callback, 1);
+SCM
+Hara_kiri_group_spanner::force_hara_kiri_callback (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ consider_suicide (me);
+ return scm_from_double (0.0);
+}
- return 0.0;
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, force_hara_kiri_in_y_parent_callback, 1);
+SCM
+Hara_kiri_group_spanner::force_hara_kiri_in_y_parent_callback (SCM smob)
+{
+ Grob *daughter = unsmob_grob (smob);
+ force_hara_kiri_callback (daughter->get_parent (Y_AXIS)->self_scm ());
+ return scm_from_double (0.0);
}
+
+void
+Hara_kiri_group_spanner::add_interesting_item (Grob *me, Grob *n)
+{
+ Pointer_group_interface::add_unordered_grob (me, ly_symbol2scm ("items-worth-living"), n);
+}
+
+ADD_INTERFACE (Hara_kiri_group_spanner, "hara-kiri-group-interface",
+ "A group spanner that keeps track of interesting items. If it "
+ "doesn't contain any after linebreaking, then it "
+ "will remove itself and all its children.",
+
+
+ /* properties */
+ "items-worth-living "
+ "remove-empty "
+ "remove-first "
+ );
+
+