source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+#include <math.h> // ceil.
+
#include "debug.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)
+{
+ Score_element *them = unsmob_element (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
+ assert (a == Y_AXIS);
-IMPLEMENT_STATIC_NAME(Rest_collision);
-IMPLEMENT_IS_TYPE_B1(Rest_collision,Item);
+ Score_element * rc = unsmob_element (them->get_elt_property ("rest-collision"));
-void
-Rest_collision::add(Note_column *nc_l)
-{
- add_dependency(nc_l);
- ncol_l_arr_.push(nc_l);
-}
+ if (rc)
+ {
+ /*
+ Done: destruct pointers, so we do the shift only once.
+ */
+ SCM elts = rc->get_elt_property ("elements");
+ rc->set_elt_property ("elements", SCM_EOL);
-void
-Rest_collision::add(Rest_column *rc_l)
-{
- add_dependency(rc_l);
- rest_l_arr_.push(rc_l);
+ do_shift (rc, elts);
+ }
+
+ return gh_double2scm (0.0);
}
void
-Rest_collision::add(Collision * c_l)
+Rest_collision::add_column (Score_element*me,Score_element *p)
{
- add_dependency(c_l);
- for (int i=0; i < c_l->clash_l_arr_.size(); i ++)
- ncol_l_arr_.push(c_l->clash_l_arr_[i]);
+ me->add_dependency (p);
+ Pointer_group_interface::add_element (me, "elements", p);
+
+ p->add_offset_callback (Rest_collision::force_shift_callback_proc, Y_AXIS);
+ p->set_elt_property ("rest-collision", me->self_scm ());
}
-void
-Rest_collision::do_post_processing()
+
+/*
+ Combination of dot-count and duration-log.
+ */
+static SCM
+head_characteristic (Score_element * col)
{
- /*
- handle rest under beam (do_post: beams are calculated now)
-
- [todo]
- i-d like to have access to the beam itself,
- iso only the (half-initialised?) stem
-
- 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_i_;
- int midpos = 4;
-#if 1
- // ugh
- int stem_length_i = 7 - 2;
- // ugh, Stem::stem_start vs Stem::stem_end
- int pos = (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_heads(pos);
+ Score_element * s = unsmob_element (col->get_elt_property ("rest"));
+
+ if (!s)
+ return SCM_BOOL_F;
+ else
+ return gh_cons (s->get_elt_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.
+ */
+SCM
+Rest_collision::do_shift (Score_element *me, SCM elts)
{
- /*
- handle rest-rest and rest-note collisions
-
- [todo]
- decide not to print rest if too crowded?
- */
-
- // no rests to collide
- if (!rest_l_arr_.size())
- return;
-
- // no partners to collide with
- if (rest_l_arr_.size() + ncol_l_arr_.size() < 2 )
- return;
-
- // meisjes met meisjes
- if (!ncol_l_arr_.size()) {
- int dy = rest_l_arr_.size() > 2 ? 6 : 4;
- rest_l_arr_[0]->translate_heads(dy);
- // top is last element...
- rest_l_arr_.top()->translate_heads(-dy);
+ /*
+ ugh. -> score elt type
+ */
+ Link_array<Score_element> rests;
+ Link_array<Score_element> notes;
+
+ for (SCM s = elts; gh_pair_p (s); s = gh_cdr (s))
+ {
+ Score_element * e = unsmob_element (gh_car (s));
+ if (e && unsmob_element (e->get_elt_property ("rest")))
+ rests.push (e);
+ else
+ notes.push (e);
}
- // 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_heads(dir_i * 3 );
-#else
- // int dir_i = - ncol_l_arr_[0]->dir_i_;
- int dir_i = rest_l_arr_[0]->dir_i_;
- // 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;
+
+
+ /*
+ handle rest-rest and rest-note collisions
+
+ [todo]
+ * decide not to print rest if too crowded?
+
+ * ignore rests under beams.
+ */
+
+ // no rests to collide
+ if (!rests.size())
+ return SCM_UNSPECIFIED;
+
+ // no partners to collide with
+ if (rests.size() + notes.size () < 2)
+ return SCM_UNSPECIFIED;
+
+ // meisjes met meisjes
+ if (!notes.size())
+ {
+ 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_elt_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--)
+ {
+ Score_element* r = unsmob_element (rests[i-1]->get_elt_property ("rest"));
+ if (r)
+ 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?
- int sep_i = 3 + size_i / 2;
- for (int i = 0; i < ncol_l_arr_.size(); i++) {
- // 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;
+ */
+ 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);
}
- rest_l_arr_[0]->translate_heads(dir_i * minpos );
-#endif
}
-}
+ // meisjes met jongetjes
+ else
+ {
+ if (rests.size () > 1)
+ {
+ warning (_("too many colliding rests"));
+ }
+ if (notes.size () > 1)
+ {
+ warning (_("too many notes for rest collision"));
+ }
+ Score_element * rcol = rests[0];
+
+ // try to be opposite of noteheads.
+ Direction dir = - Note_column::dir (notes[0]);
+
+ Interval restdim = Note_column::rest_dim (rcol);
+ if (restdim.empty_b ())
+ return SCM_UNSPECIFIED;
+
+ // staff ref'd?
+ Real staff_space = 1.0;
+
+ /* FIXME
+ staff_space = rcol->rests[0]->staff_space ();
+ */
+ Real minimum_dist = gh_scm2double (me->get_elt_property ("minimum-distance")) * staff_space;
+
+ /*
+ assumption: ref points are the same.
+ */
+ Interval notedim;
+ for (int i = 0; i < notes.size(); i++)
+ {
+ notedim.unite (notes[i]->extent (notes[i],Y_AXIS)); // refp?
+ }
-void
-Rest_collision::do_print() const
-{
-#ifndef NPRINT
- mtor << "rests: " << rest_l_arr_.size() << ", ";
- mtor << "cols: " << ncol_l_arr_.size();
-#endif
+ Interval inter (notedim);
+ inter.intersect (restdim);
+
+ Real dist =
+ minimum_dist + dir * (notedim[dir] - restdim[-dir]) >? 0;
+
+
+ // FIXME
+ //int stafflines = 5; // rcol->rests[0]->line_count;
+ int stafflines = Staff_symbol_referencer::line_count (me);
+ // hurg?
+ stafflines = stafflines != 0 ? 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;
}
void
-Rest_collision::do_substitute_dependency(Score_elem*o,Score_elem*n)
+Rest_collision::set_interface (Score_element*me)
{
- Item*o_l = o->item();
- Item*n_l = n?n->item():0;
-
- rest_l_arr_.substitute((Rest_column*)o_l,(Rest_column*)n_l);
- ncol_l_arr_.substitute((Note_column*)o_l,(Note_column*)n_l);
+ me->set_extent_callback (SCM_EOL, X_AXIS);
+ me->set_extent_callback (SCM_EOL, Y_AXIS);
}
-Rest_collision::Rest_collision()
-{
- transparent_b_ = true;
- empty_b_ = true;
-}
projects / lilypond.git / blobdiff