source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "debug.hh"
+#include <math.h> // ceil.
+
+#include "warn.hh"
#include "rest-collision.hh"
-#include "rest-column.hh"
#include "note-column.hh"
#include "stem.hh"
-#include "note-head.hh"
-#include "collision.hh"
+#include "rhythmic-head.hh"
#include "paper-def.hh"
+#include "rest.hh"
+#include "group-interface.hh"
+#include "staff-symbol-referencer.hh"
+#include "duration.hh"
+
+MAKE_SCHEME_CALLBACK (Rest_collision,force_shift_callback,2);
+SCM
+Rest_collision::force_shift_callback (SCM element_smob, SCM axis)
+{
+ Grob *them = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
+ assert (a == Y_AXIS);
+ Grob * rc = unsmob_grob (them->get_grob_property ("rest-collision"));
-IMPLEMENT_IS_TYPE_B1(Rest_collision,Item);
+ if (rc && !to_boolean (rc->get_grob_property ("positioning-done")))
+ {
+ rc->set_grob_property ("positioning-done", SCM_BOOL_T);
-void
-Rest_collision::add (Note_column *nc_l)
-{
- add_dependency (nc_l);
- if (nc_l->rest_b ())
- rest_l_arr_.push (nc_l);
- else
- ncol_l_arr_.push (nc_l);
+ do_shift (rc);
+ }
+
+ return gh_double2scm (0.0);
}
void
-Rest_collision::do_post_processing()
+Rest_collision::add_column (Grob*me,Grob *p)
{
+ me->add_dependency (p);
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), p);
+
/*
- handle rest under beam (do_post: beams are calculated now)
+ only add callback for the rests, since we don't move anything
+ else.
- [todo]
- i-d like to have access to the beam itself,
- iso only the (half-initialised?) stem
+ (not?)
+ */
+ p->add_offset_callback (Rest_collision::force_shift_callback_proc, Y_AXIS);
+ p->set_grob_property ("rest-collision", me->self_scm ());
+}
- what about combination of collisions and rest under beam
- */
- // no rests to collide
- if (!rest_l_arr_.size())
- return;
- // can this happen?
- Stem* stem_l = rest_l_arr_[0]->stem_l_;
- if (!stem_l)
- return;
- // no beam
- if (!(stem_l->beams_left_i_ || stem_l->beams_right_i_))
- return;
-
- int dir_i = rest_l_arr_[0]->dir_;
- int midpos = 4;
-#if 1
- // ugh
- int stem_length_i = 7 - 2;
- // ugh, Stem::stem_start vs Stem::stem_end
- int pos = (int)(stem_l->stem_end_f() - midpos) - dir_i * stem_length_i;
-#else // nogo: stem_start not set for rests?
- int pos = (stem_l->stem_start_f() - midpos) + dir_i * 2;
-#endif
- rest_l_arr_[0]->translate_rests (pos);
+/*
+ Combination of dot-count and duration-log.
+ */
+static SCM
+head_characteristic (Grob * col)
+{
+ Grob * s = unsmob_grob (col->get_grob_property ("rest"));
+
+ if (!s)
+ return SCM_BOOL_F;
+ else
+ return gh_cons (s->get_grob_property ("duration-log"),
+ gh_int2scm (Rhythmic_head::dot_count (s)));
}
-void
-Rest_collision::do_pre_processing()
+/*
+ TODO: fixme, fucks up if called twice on the same set of rests.
+
+ TODO: look at horizontal-shift to determine ordering between rests
+ for more than two voices.
+
+ TODO: look at previous note to determine vertical position?
+
+ */
+SCM
+Rest_collision::do_shift (Grob *me)
{
+ SCM elts = me->get_grob_property ("elements");
+
+ Link_array<Grob> rests;
+ Link_array<Grob> notes;
+
+ for (SCM s = elts; gh_pair_p (s); s = ly_cdr (s))
+ {
+ Grob * e = unsmob_grob (ly_car (s));
+ if (unsmob_grob (e->get_grob_property ("rest")))
+ rests.push (e);
+ else
+ notes.push (e);
+ }
+
+
/*
handle rest-rest and rest-note collisions
[todo]
- decide not to print rest if too crowded?
+ * decide not to print rest if too crowded?
+
+ * ignore rests under beams.
*/
// no rests to collide
- if (!rest_l_arr_.size())
- return;
+ if (!rests.size ())
+ return SCM_UNSPECIFIED;
// no partners to collide with
- if (rest_l_arr_.size() + ncol_l_arr_.size () < 2)
- return;
+ if (rests.size () + notes.size () < 2)
+ return SCM_UNSPECIFIED;
// meisjes met meisjes
- if (!ncol_l_arr_.size())
+ if (!notes.size ())
{
- int dy = rest_l_arr_.size() > 2 ? 6 : 4;
+ SCM characteristic = head_characteristic (rests[0]);
+ int i = 1;
+ for (; i < rests.size (); i++)
+ {
+ if (!gh_equal_p (head_characteristic (rests[i]), characteristic))
+ break;
+ }
+
+ /*
+ If all durations are the same, we'll check if there are more
+ rests than maximum-rest-count.
+ Otherwise (different durations), we'll try to display them all
+ (urg: all 3 of them, currently).
+ */
+ int display_count;
+ SCM s = me->get_grob_property ("maximum-rest-count");
+ if (i == rests.size ()
+ && gh_number_p (s) && gh_scm2int (s) < rests.size ())
+ {
+ display_count = gh_scm2int (s);
+ for (; i > display_count; i--)
+ {
+ Grob* r = unsmob_grob (rests[i-1]->get_grob_property ("rest"));
+ if (r)
+ {
+ Grob * d = unsmob_grob (r->get_grob_property ("dot"));
+ if (d)
+ d->suicide();
+ r->suicide ();
+ }
+ rests[i-1]->suicide ();
+ }
+ }
+ else
+ display_count = rests.size ();
+
+ /*
+ Ugh. Should have minimum dist.
+
+ Ugh. What do we do if we have three different rests?
- rest_l_arr_[0]->translate_rests (rest_l_arr_[0]->dir_ *dy);
- // top is last element...
- rest_l_arr_.top()->translate_rests (rest_l_arr_.top ()->dir_* dy);
+ */
+ int dy = display_count > 2 ? 6 : 4; // FIXME Should get dims from table.
+ if (display_count > 1)
+ {
+ Direction d0 = Note_column::dir (rests[0]);
+ Direction d1 = Note_column::dir (rests[1]);
+
+ if (!d0 && !d1)
+ {
+ d0= UP;
+ d1 = DOWN;
+ }
+ else if (!d0)
+ d0 = - d1;
+ else if (!d1)
+ d1 = -d0;
+
+ Note_column::translate_rests (rests[0],d0 *dy);
+ Note_column::translate_rests (rests[1], d1 *dy);
+ }
}
// meisjes met jongetjes
else
{
-#if 0 // breendet: rests go always under
- // geen gemug, trug op je rug
- int dir_i = -1;
- rest_l_arr_[0]->translate_rests (dir_i * 3);
-#else
- // int dir_i = - ncol_l_arr_[0]->dir_;
- int dir_i = rest_l_arr_[0]->dir_;
- // hope it's 4: if it works->doco
- int midpos = 4;
-
- // minimum move
- int minpos = 4;
-
- // quart rest height
- // UGH Should get dims from table!
- int size_i = 6;
-
- int sep_i = 3 + size_i / 2;
- for (int i = 0; i < ncol_l_arr_.size(); i++)
+ if (rests.size () > 1)
{
- // how to know whether to sort?
- ncol_l_arr_[i]->sort();
- for (int j = 0; j < ncol_l_arr_[i]->head_l_arr_.size(); j++)
- minpos = minpos >? dir_i *
- (ncol_l_arr_[i]->head_l_arr_[j]->position_i_ -midpos) + sep_i;
+ warning (_ ("too many colliding rests"));
}
- rest_l_arr_[0]->translate_rests (dir_i * minpos);
-#endif
- }
-}
+ Grob * rcol = rests[0];
+ Direction dir = Note_column::dir (rests[0]);
-void
-Rest_collision::do_print() const
-{
-#ifndef NPRINT
- DOUT << "rests: " << rest_l_arr_.size() << ", ";
- DOUT << "cols: " << ncol_l_arr_.size();
-#endif
-}
+ if (!dir)
+ {
+ dir = - Note_column::dir (notes[0]);
+ }
+ Grob * r = unsmob_grob (rcol->get_grob_property ("rest"));
+ Interval restdim = r->extent (r, Y_AXIS); // ??
-void
-Rest_collision::do_substitute_dependency (Score_elem*o,Score_elem*n)
-{
- Item*o_l = o->item();
-
+ if (restdim.is_empty ())
+ return SCM_UNSPECIFIED;
+
- if (o_l&&o_l->is_type_b (Note_column::static_name ()))
- {
- Note_column *n_l = n?(Note_column*)n->item():0;
- rest_l_arr_.substitute ((Note_column*)o_l, n_l);
- ncol_l_arr_.substitute ((Note_column*)o_l, n_l);
+ Real staff_space = Staff_symbol_referencer::staff_space (rcol);
+
+ Real minimum_dist = robust_scm2double (me->get_grob_property ("minimum-distance"), 1.0) * staff_space;
+
+
+ Grob *common = common_refpoint_of_array (notes, rcol, Y_AXIS);
+
+ Interval notedim;
+ for (int i = 0; i < notes.size (); i++)
+ {
+ notedim.unite (notes[i]->extent (common, Y_AXIS));
+ }
+
+ Interval inter (notedim);
+ inter.intersect (restdim);
+
+ Real dist =
+ minimum_dist + dir * (notedim[dir] - restdim[-dir]) >? 0;
+
+ int stafflines = Staff_symbol_referencer::line_count (me);
+ if (!stafflines)
+ {
+ programming_error ("No staff line count ? ");
+ stafflines =5;
+ }
+
+ // move discretely by half spaces.
+ int discrete_dist = int (ceil (dist / (0.5 *staff_space)));
+
+ // move by whole spaces inside the staff.
+ if (discrete_dist < stafflines+1)
+ discrete_dist = int (ceil (discrete_dist / 2.0)* 2.0);
+
+ Note_column::translate_rests (rcol,dir * discrete_dist);
}
+ return SCM_UNSPECIFIED;
}
-Rest_collision::Rest_collision()
-{
- transparent_b_ = true;
- empty_b_ = true;
-}
+
+ADD_INTERFACE (Rest_collision,"rest-collision-interface",
+ "Move around ordinary rests (not multi-measure-rests) to avoid "
+"conflicts.",
+ "maximum-rest-count minimum-distance positioning-done elements");
+