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"
-
-MAKE_SCHEME_CALLBACK(Hara_kiri_group_spanner,y_extent,2);
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, y_extent, 1);
SCM
-Hara_kiri_group_spanner::y_extent (SCM element_smob, SCM scm_axis)
+Hara_kiri_group_spanner::y_extent (SCM smob)
{
- Grob *me = unsmob_element (element_smob);
- Axis a = (Axis) gh_scm2int (scm_axis);
-
- assert (a == Y_AXIS);
+ Grob *me = unsmob_grob (smob);
consider_suicide (me);
- return Axis_group_interface::group_extent_callback (me->self_scm (), scm_axis);
+ return Axis_group_interface::generic_group_extent (me, Y_AXIS);
}
-
void
-Hara_kiri_group_spanner::consider_suicide(Grob*me)
+Hara_kiri_group_spanner::consider_suicide (Grob *me)
{
- SCM worth = me->get_grob_property ("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<Grob> childs = Axis_group_interface::get_children (me);
+ 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;
+
+ Link_array<Grob> childs;
+ Axis_group_interface::get_children (me, &childs);
for (int 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. */
-MAKE_SCHEME_CALLBACK(Hara_kiri_group_spanner,force_hara_kiri_callback,2);
+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)
+Hara_kiri_group_spanner::force_hara_kiri_callback (SCM smob, SCM axis)
{
- Grob *me = unsmob_element (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
- assert (a == Y_AXIS);
+ Grob *me = unsmob_grob (smob);
+ (void) axis;
+
+ assert (scm_to_int (axis) == Y_AXIS);
consider_suicide (me);
- return gh_double2scm (0.0);
+ return scm_from_double (0.0);
}
-
-MAKE_SCHEME_CALLBACK(Hara_kiri_group_spanner,force_hara_kiri_in_parent_callback,2);
+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)
+Hara_kiri_group_spanner::force_hara_kiri_in_parent_callback (SCM smob, SCM axis)
{
- Grob *daughter = unsmob_element (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
+ Grob *daughter = unsmob_grob (smob);
+ Axis a = (Axis) scm_to_int (axis);
assert (a == Y_AXIS);
- force_hara_kiri_callback (daughter->parent_l (a)->self_scm (), axis);
- return gh_double2scm ( 0.0);
+ force_hara_kiri_callback (daughter->get_parent (a)->self_scm (), axis);
+ return scm_from_double (0.0);
}
void
-Hara_kiri_group_spanner::add_element (Grob * me, Grob *e)
+Hara_kiri_group_spanner::add_interesting_item (Grob *me, Grob *n)
{
- // e->add_offset_callback (force_hara_kiri_in_parent_callback, Y_AXIS);
- Axis_group_interface::add_element (me, e);
+ 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.",
-void
-Hara_kiri_group_spanner::set_interface (Grob*me)
-{
- me->set_interface (ly_symbol2scm ("hara-kiri-group-interface"));
-}
+ /* properties */
+ "items-worth-living "
+ "remove-empty "
+ "remove-first "
+ );
-bool
-Hara_kiri_group_spanner::has_interface (Grob*me)
-{
- return me->has_interface (ly_symbol2scm ("hara-kiri-group-interface"));
-}
-void
-Hara_kiri_group_spanner::add_interesting_item (Grob* me,Grob* n)
-{
- me->add_dependency (n);
- Pointer_group_interface::add_element (me, "items-worth-living",n);
-}