/*
rest-collision.cc -- implement Rest_collision
- source file of the LilyPond music typesetter
+ 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 <math.h> // ceil.
+
+#include "warn.hh"
#include "rest-collision.hh"
-#include "rest-column.hh"
-#include "collision.hh"
+#include "note-column.hh"
+#include "stem.hh"
+#include "rhythmic-head.hh"
+#include "paper-def.hh"
+#include "rest.hh"
+#include "group-interface.hh"
+#include "staff-symbol-referencer.hh"
+#include "duration.hh"
-void
-Rest_collision::add(Rest_column *rc_l)
+MAKE_SCHEME_CALLBACK (Rest_collision,force_shift_callback,2);
+SCM
+Rest_collision::force_shift_callback (SCM element_smob, SCM axis)
{
- rest_l_arr_.push(rc_l);
- add_dependency(rc_l);
+ 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"));
+
+ if (rc && !to_boolean (rc->get_grob_property ("positioning-done")))
+ {
+ rc->set_grob_property ("positioning-done", SCM_BOOL_T);
+
+ do_shift (rc);
+ }
+
+ return gh_double2scm (0.0);
}
+
void
-Rest_collision::add(Collision * c_l)
+Rest_collision::add_column (Grob*me,Grob *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_grob (me, ly_symbol2scm ("elements"), p);
+
+ /*
+ only add callback for the rests, since we don't move anything
+ else.
+
+ (not?)
+ */
+ p->add_offset_callback (Rest_collision::force_shift_callback_proc, Y_AXIS);
+ p->set_grob_property ("rest-collision", me->self_scm ());
}
-void
-Rest_collision::do_post_processing()
+/*
+ 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)));
+}
+
+/*
+ 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)
{
-#if 0
- bool rest_b_a[4];
- rest_b_a[j] = (col_l_a[j]) ? col_l_a[j]->rest_b_ : false;
- do {
- int i1 = idx(d, false);
- int i2 = idx(d,true);
- if (!intersection(y_extent[i1] ,
- y_extent[i2]).empty_b()) {
- if (rest_b_a[i1]) {
- y_off[i1] = -y_extent[i1][-d] + y_extent[1][d] + d*4; // ugh
- y_extent[i1] += y_off[i1];
+ 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?
+
+ * 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_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 ();
}
}
- } while ((d *= -1) != 1);
+ else
+ display_count = rests.size ();
+
+ /*
+ Ugh. Should have minimum dist.
- do {
- int i1 = idx(d, false);
- int i2 = idx(-d,false);
+ Ugh. What do we do if we have three different rests?
- if (d*(y_extent[i1][-d] - y_extent[i2][d] )< 0&& rest_b_a[i1]) {
- y_off[i1] = -y_extent[i1][-d] + y_extent[i2][d] +d* 4; // ugh
- y_extent[i1] += y_off[i1];
+ */
+ 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 (rests.size () > 1)
+ {
+ warning (_ ("too many colliding rests"));
}
- } while ((d *= -1) != 1);
-
-#endif
+ Grob * rcol = rests[0];
+ Direction dir = Note_column::dir (rests[0]);
+
+ if (!dir)
+ {
+ dir = - Note_column::dir (notes[0]);
+ }
+ Grob * r = unsmob_grob (rcol->get_grob_property ("rest"));
+ Interval restdim = r->extent (r, Y_AXIS); // ??
+
+ if (restdim.is_empty ())
+ return SCM_UNSPECIFIED;
+
+
+ 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;
}
-IMPLEMENT_STATIC_NAME(Rest_collision);
+
+
+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");
+
projects / lilypond.git / blobdiff