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--2008 Jan Nieuwenhuizen <janneke@gnu.org>
+ Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "axis-group-interface.hh"
-#include "spanner.hh"
#include "hara-kiri-group-spanner.hh"
-#include "debug.hh"
-#include "item.hh"
+#include "paper-column.hh"
+#include "pointer-group-interface.hh"
+#include "axis-group-interface.hh"
+#include "spanner.hh"
+#include "warn.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_grob (element_smob);
- Axis a = (Axis) gh_scm2int (scm_axis);
+ Grob *me = unsmob_grob (smob);
+ consider_suicide (me);
+ return Axis_group_interface::generic_group_extent (me, Y_AXIS);
+}
- assert (a == Y_AXIS);
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, calc_skylines, 1);
+SCM
+Hara_kiri_group_spanner::calc_skylines (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
consider_suicide (me);
- return Axis_group_interface::group_extent_callback (me->self_scm (), scm_axis);
+ return Axis_group_interface::calc_skylines (smob);
}
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, pure_height, 3);
+SCM
+Hara_kiri_group_spanner::pure_height (SCM smob, SCM start_scm, SCM end_scm)
+{
+ Grob *me = unsmob_grob (smob);
+ int start = robust_scm2int (start_scm, 0);
+ int end = robust_scm2int (end_scm, INT_MAX);
-void
-Hara_kiri_group_spanner::consider_suicide(Grob*me)
+ if (request_suicide (me, start, end))
+ return ly_interval2scm (Interval ());
+
+ return ly_interval2scm (Axis_group_interface::pure_group_height (me, start, end));
+}
+
+/* there is probably a way that doesn't involve re-implementing a binary
+ search (I would love some proper closures right now) */
+bool find_in_range (SCM vector, int low, int hi, int min, int max)
{
- SCM worth = me->get_grob_property ("items-worth-living");
- if (gh_pair_p (worth))
- return ;
+ if (low >= hi)
+ return false;
+
+ int mid = low + (hi - low) / 2;
+ int val = scm_to_int (scm_c_vector_ref (vector, mid));
+ if (val >= min && val <= max)
+ return true;
+ else if (val < min)
+ return find_in_range (vector, mid+1, hi, min, max);
+ return find_in_range (vector, low, mid, min, max);
+}
- Link_array<Grob> childs = Axis_group_interface::get_children (me);
- for (int i = 0; i < childs.size (); i++)
- childs[i]->suicide ();
+bool
+Hara_kiri_group_spanner::request_suicide (Grob *me, int start, int end)
+{
+ if (!to_boolean (me->get_property ("remove-empty")))
+ return false;
+
+ bool remove_first = to_boolean (me->get_property ("remove-first"));
+ if (!remove_first && start <= 0)
+ return false;
+
+ SCM important = me->get_property ("important-column-ranks");
+ if (scm_is_vector (important))
+ {
+ int len = scm_c_vector_length (important);
+ if (find_in_range (important, 0, len, start, end))
+ return false;
+ }
+ else /* build the important-columns-cache */
+ {
+ extract_grob_set (me, "items-worth-living", worth);
+ vector<int> ranks;
+
+ for (vsize i = 0; i < worth.size (); i++)
+ {
+ Interval_t<int> iv = worth[i]->spanned_rank_interval ();
+ for (int j = iv[LEFT]; j <= iv[RIGHT]; j++)
+ ranks.push_back (j);
+ }
+ vector_sort (ranks, less<int> ());
+ uniq (ranks);
+
+ SCM scm_vec = scm_c_make_vector (ranks.size (), SCM_EOL);
+ for (vsize i = 0; i < ranks.size (); i++)
+ scm_vector_set_x (scm_vec, scm_from_int (i), scm_from_int (ranks[i]));
+ me->set_property ("important-column-ranks", scm_vec);
+
+ return request_suicide (me, start, end);
+ }
+
+ return true;
+}
+void
+Hara_kiri_group_spanner::consider_suicide (Grob *me)
+{
+ Spanner *sp = dynamic_cast<Spanner*> (me);
+ int left = sp->get_bound (LEFT)->get_column ()->get_rank ();
+ int right = sp->get_bound (RIGHT)->get_column ()->get_rank ();
+ if (!request_suicide (me, left, right))
+ 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. */
-MAKE_SCHEME_CALLBACK(Hara_kiri_group_spanner,force_hara_kiri_callback,2);
+MAKE_SCHEME_CALLBACK (Hara_kiri_group_spanner, force_hara_kiri_callback, 1);
SCM
-Hara_kiri_group_spanner::force_hara_kiri_callback (SCM element_smob, SCM axis)
+Hara_kiri_group_spanner::force_hara_kiri_callback (SCM smob)
{
- Grob *me = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
- assert (a == Y_AXIS);
+ Grob *me = unsmob_grob (smob);
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_y_parent_callback, 1);
SCM
-Hara_kiri_group_spanner::force_hara_kiri_in_parent_callback (SCM element_smob, SCM axis)
+Hara_kiri_group_spanner::force_hara_kiri_in_y_parent_callback (SCM smob)
{
- Grob *daughter = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
- assert (a == Y_AXIS);
- force_hara_kiri_callback (daughter->parent_l (a)->self_scm (), axis);
- return gh_double2scm ( 0.0);
+ 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_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_unordered_grob (me, ly_symbol2scm ("items-worth-living"), n);
}
+ADD_INTERFACE (Hara_kiri_group_spanner,
+ "A group spanner that keeps track of interesting items. If it"
+ " doesn't contain any after line breaking, it removes 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 "
+ "important-column-ranks "
+ "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);
-}
projects / lilypond.git / blobdiff