/*
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"
+#include "directional-element-interface.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)
{
-#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];
+ 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.
+
+
+ */
+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")))
+ {
+ /*
+ Ignore rests under beam.
+ */
+ Grob* st = unsmob_grob (e->get_grob_property ("stem"));
+ if (st && unsmob_grob (st->get_grob_property ("beam")))
+ continue;
+
+ rests.push (e);
+ }
+ else
+ notes.push (e);
+ }
+
+
+ /*
+ handle rest-rest and rest-note collisions
+
+ [todo]
+ * decide not to print rest if too crowded?
+ */
+
+ /*
+ no partners to collide with
+ */
+ if (rests.size () + notes.size () < 2)
+ return SCM_UNSPECIFIED;
+
+
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+ /*
+ only rests
+ */
+ if (!notes.size ())
+ {
+
+ /*
+ This is incomplete: in case of an uneven number of rests, the
+ center one should be centered on the staff.
+ */
+ Drul_array< Link_array <Grob > > ordered_rests;
+ for (int i= 0; i < rests.size (); i++)
+ {
+ Grob * r = Note_column::get_rest (rests[i]);
+
+ Direction d = get_grob_direction (r);
+ if (d)
+ {
+ ordered_rests[d].push (rests[i]);
}
+ else
+ rests[d]->warning (_("rest direction not set. Cannot resolve collision."));
+ }
+
+ Direction d = LEFT;
+ do {
+ ordered_rests[d].sort (Note_column::shift_compare);
+ } while (flip (&d) != LEFT);
+
+ if (ordered_rests[UP].size () + ordered_rests[DOWN].size () < 2)
+ return SCM_UNSPECIFIED;
+
+ Grob *common = common_refpoint_of_array (ordered_rests[DOWN], me, Y_AXIS);
+ common = common_refpoint_of_array (ordered_rests[UP], common, Y_AXIS);
+
+ Real diff =
+ (ordered_rests[DOWN].top ()->extent (common, Y_AXIS)[UP]
+ - ordered_rests[UP].top ()->extent (common, Y_AXIS)[DOWN]) /staff_space;
+
+ if (diff > 0)
+ {
+ int amount_down = (int) ceil (diff / 2);
+ diff -= amount_down;
+ Note_column::translate_rests (ordered_rests[DOWN].top (),
+ -2 * amount_down);
+ if (diff > 0)
+ Note_column::translate_rests (ordered_rests[UP].top (),
+ 2 * int (ceil (diff)));
+ }
+
+ do {
+ for (int i = ordered_rests[d].size () -1; i-- > 0;)
+ {
+ Real last_y = ordered_rests[d][i+1]->extent (common, Y_AXIS)[d];
+ Real y = ordered_rests[d][i]->extent (common, Y_AXIS)[-d];
+
+ Real diff = d * ((last_y - y) /staff_space);
+ if (diff > 0)
+ Note_column::translate_rests (ordered_rests[d][i],d * (int) ceil (diff) * 2);
+ }
+ } while (flip (&d) != LEFT);
+ }
+ else
+ {
+ /*
+ Rests and notes.
+ */
+ if (rests.size () > 1)
+ {
+ warning (_ ("too many colliding rests"));
+ }
+ Grob * rcol = rests[0];
+ Grob *common = common_refpoint_of_array (notes, rcol, Y_AXIS);
+
+ Direction dir = Note_column::dir (rests[0]);
+
+ Interval restdim = rcol->extent (common, 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;
+
+ Interval notedim;
+ for (int i = 0; i < notes.size (); i++)
+ {
+ notedim.unite (notes[i]->extent (common, Y_AXIS));
}
- } while ((d *= -1) != 1);
-
- do {
- int i1 = idx(d, false);
- int i2 = idx(-d,false);
-
- 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];
+
+ 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;
}
- } while ((d *= -1) != 1);
-
-#endif
+
+ // 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