source file of the GNU LilyPond music typesetter
- (c) 1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1998--2005 Jan Nieuwenhuizen <janneke@gnu.org>
Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "axis-group-interface.hh"
#include "hara-kiri-group-spanner.hh"
-#include "debug.hh"
-#include "item.hh"
-/*
- */
-Hara_kiri_group_spanner::Hara_kiri_group_spanner(SCM s)
- : Spanner (s)
-{
- set_elt_pointer ("items-worth-living", SCM_EOL);
-}
+#include "axis-group-interface.hh"
+#include "spanner.hh"
+#include "warn.hh"
+#include "item.hh"
-void
-Hara_kiri_group_spanner::add_interesting_item (Item* n)
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, y_extent, 2);
+SCM
+Hara_kiri_group_spanner::y_extent (SCM element_smob, SCM scm_axis)
{
- add_dependency (n);
- Pointer_group_interface (this, "items-worth-living").add_element (n);
+ Grob *me = unsmob_grob (element_smob);
+ (void) scm_axis;
+ assert (scm_to_int (scm_axis) == Y_AXIS);
+ consider_suicide (me);
+ return Axis_group_interface::group_extent_callback (me->self_scm (), scm_axis);
}
-GLUE_SCORE_ELEMENT(Hara_kiri_group_spanner,after_line_breaking);
-SCM
-Hara_kiri_group_spanner::member_after_line_breaking ()
+void
+Hara_kiri_group_spanner::consider_suicide (Grob *me)
{
- SCM worth = get_elt_pointer ("items-worth-living");
- if (gh_pair_p (worth))
- return SCM_UNDEFINED;
+ Spanner *sp = dynamic_cast<Spanner *> (me);
+ SCM worth = me->get_property ("items-worth-living");
+ if (scm_is_pair (worth))
+ return;
- Link_array<Score_element> childs = Axis_group_interface (this).get_children ();
- for (int i = 0; i < childs.size (); i++)
+ if (!to_boolean (me->get_property ("remove-first"))
+ && broken_spanner_index (sp) == 0)
{
- Score_element* s = childs[i];
-
- if ( line_l () != s->line_l ())
- programming_error ("Killing other children too");
- s->suicide ();
+ return;
}
+ Link_array<Grob> childs = Axis_group_interface::get_children (me);
+ for (int i = 0; i < childs.size (); i++)
+ childs[i]->suicide ();
+
/*
very appropriate name here :-)
- */
- suicide ();
- return SCM_UNDEFINED;
+ */
+ 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 const *elt, Axis a)
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, force_hara_kiri_callback, 2);
+SCM
+Hara_kiri_group_spanner::force_hara_kiri_callback (SCM element_smob, SCM axis)
{
- while (elt && !dynamic_cast<Hara_kiri_group_spanner const*> (elt))
- elt = elt->parent_l(a);
+ Grob *me = unsmob_grob (element_smob);
+ (void) axis;
+
+ assert (scm_to_int (axis) == Y_AXIS);
+ consider_suicide (me);
+ return scm_make_real (0.0);
+}
- if (elt)
- {
- Hara_kiri_group_spanner const * seppuku = dynamic_cast<Hara_kiri_group_spanner const*> (elt);
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, force_hara_kiri_in_parent_callback, 2);
+SCM
+Hara_kiri_group_spanner::force_hara_kiri_in_parent_callback (SCM element_smob, SCM axis)
+{
+ Grob *daughter = unsmob_grob (element_smob);
+ Axis a = (Axis) scm_to_int (axis);
+ assert (a == Y_AXIS);
+ force_hara_kiri_callback (daughter->get_parent (a)->self_scm (), axis);
+ return scm_make_real (0.0);
+}
- ((Hara_kiri_group_spanner*)seppuku)->member_after_line_breaking ();
- }
-
+void
+Hara_kiri_group_spanner::add_element (Grob *me, Grob *e)
+{
+ // e->add_offset_callback (force_hara_kiri_in_parent_callback, Y_AXIS);
+ Axis_group_interface::add_element (me, e);
+}
- return 0.0;
+void
+Hara_kiri_group_spanner::add_interesting_item (Grob *me, Grob *n)
+{
+ me->add_dependency (n);
+ Pointer_group_interface::add_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.",
+ "items-worth-living remove-first");
+