*/
#include <math.h>
+#include <stdio.h>
-#include "line-of-score.hh"
+#include "system.hh"
+#include "paper-def.hh"
#include "paper-score.hh"
#include "paper-column.hh"
#include "item.hh"
#include "misc.hh"
#include "warn.hh"
#include "staff-spacing.hh"
+#include "spring.hh"
+#include "paper-column.hh"
+#include "spaceable-grob.hh"
+#include "break-align-interface.hh"
+#include "spacing-interface.hh"
/*
paper-column:
-
- Don't be confused by right-items: each spacing wish can also contain
- a number of items, with which a spacing constraint may be kept. It's
- a little baroque, but it might come in handy later on?
-
*/
-
class Spacing_spanner
{
public:
- static Real default_bar_spacing (Grob*,Grob*,Grob*,Moment) ;
- static Real note_spacing (Grob*,Grob*,Grob*,Moment) ;
- static Real get_duration_space (Grob*,Moment dur, Moment shortest) ;
+ static void standard_breakable_column_spacing (Grob * me, Item*l, Item*r,
+ Real * fixed, Real * space, Moment);
- static void breakable_column_spacing (Item* l, Item *r);
+
+ static Real default_bar_spacing (Grob*,Grob*,Grob*,Moment);
+ static Real note_spacing (Grob*,Grob*,Grob*,Moment, bool*);
+ static Real get_duration_space (Grob*,Moment dur, Rational shortest, bool*);
+ static Rational find_shortest (Grob *, Link_array<Grob> const &);
+ static void breakable_column_spacing (Grob*, Item* l, Item *r, Moment);
static void find_loose_columns () {}
- static void prune_loose_colunms (Link_array<Grob> *cols);
+ static void prune_loose_colunms (Grob*,Link_array<Grob> *cols, Rational);
static void find_loose_columns (Link_array<Grob> cols);
static void set_explicit_neighbor_columns (Link_array<Grob> cols);
static void set_implicit_neighbor_columns (Link_array<Grob> cols);
- static void do_measure (Grob*me,Link_array<Grob> *cols);
+ static void do_measure (Rational, Grob*me,Link_array<Grob> *cols);
+ static void musical_column_spacing (Grob*,Item*,Item*, Real, Rational);
DECLARE_SCHEME_CALLBACK (set_springs, (SCM ));
+ static bool has_interface (Grob*);
};
-
-
/*
Return whether COL is fixed to its neighbors by some kind of spacing
constraint.
+
+
+ If in doubt, then we're not loose; the spacing engine should space
+ for it, risking suboptimal spacing.
+
+ (Otherwise, we might risk core dumps, and other weird stuff.)
+
*/
static bool
loose_column (Grob *l, Grob *c, Grob *r)
the column containing the clef is really loose, and should be
attached right to the first column, but that is a lot of work for
- such a borderline case.
-
- )
+ such a borderline case.)
*/
if (!gh_pair_p (lns) || !gh_pair_p (rns))
if (!l_neighbor || !r_neighbor)
return false;
+
+
/*
Only declare loose if the bounds make a little sense. This means
some cases (two isolated, consecutive clef changes) won't be
nicely folded, but hey, then don't do that.
*/
- if( (Paper_column::musical_b (l_neighbor) || Item::breakable_b (l_neighbor))
- && (Paper_column::musical_b (r_neighbor) || Item::breakable_b (r_neighbor)))
+ if(! ((Paper_column::musical_b (l_neighbor) || Item::breakable_b (l_neighbor))
+ && (Paper_column::musical_b (r_neighbor) || Item::breakable_b (r_neighbor))) )
{
- return true;
+ return false;
}
/*
- If in doubt: we're not loose; the spacing engine should space for
- it, risking suboptimal spacing.
-
- (Otherwise, we might risk core dumps, and other weird stuff.)
+ A rather hairy check, but we really only want to move around clefs. (anything else?)
+ in any case, we don't want to move bar lines.
+ */
+ for (SCM e = c->get_grob_property ("elements"); gh_pair_p (e); e = gh_cdr (e))
+ {
+ Grob * g = unsmob_grob (gh_car (e));
+ if (g && Break_align_interface::has_interface (g))
+ {
+ for (SCM s = g->get_grob_property ("elements"); gh_pair_p (s);
+ s = gh_cdr (s))
+ {
+ Grob *h = unsmob_grob (gh_car (s));
- */
- return false;
+ /*
+ ugh. -- fix staff-bar name?
+ */
+ if (h && h->get_grob_property ("break-align-symbol") == ly_symbol2scm ("staff-bar"))
+ return false;
+ }
+ }
+ }
+
+ return true;
}
/*
between.
*/
void
-Spacing_spanner::prune_loose_colunms (Link_array<Grob> *cols)
+Spacing_spanner::prune_loose_colunms (Grob*me,Link_array<Grob> *cols, Rational shortest)
{
Link_array<Grob> newcols;
-
+ Real increment = gh_scm2double (me->get_grob_property ("spacing-increment"));
for (int i=0; i < cols->size (); i++)
{
if (Item::breakable_b (cols->elem(i)) || Paper_column::musical_b (cols->elem (i)))
do
{
dists[d] = 0.0;
- Grob *lc = (d == LEFT) ? next_door[LEFT] : c;
- Grob *rc = d == LEFT ? c : next_door[RIGHT];
+ Item *lc = dynamic_cast<Item*> ((d == LEFT) ? next_door[LEFT] : c);
+ Item *rc = dynamic_cast<Item*> (d == LEFT ? c : next_door[RIGHT]);
for (SCM s = lc->get_grob_property ("spacing-wishes");
gh_pair_p (s); s = gh_cdr (s))
|| Note_spacing::right_column (sp) != rc)
continue;
- dists[d] = dists[d] >? Note_spacing::get_spacing (sp);
+ Real space, fixed;
+ fixed = 0.0;
+ bool dummy;
+
+ if (d == LEFT)
+ {
+ /*
+ The note spacing should be taken from the musical
+ columns.
+
+ */
+ Real base = note_spacing (me, lc, rc, shortest, &dummy);
+ Note_spacing::get_spacing (sp, rc, base, increment, &space, &fixed);
+
+ space -= increment;
+
+ dists[d] = dists[d] >? space;
+ }
+ else
+ {
+ Real space, fixed_space;
+ Staff_spacing::get_spacing_params (sp,
+ &space, &fixed_space);
+
+ dists[d] = dists[d] >? fixed_space;
+ }
+
}
}
while (flip (&d) != LEFT);
Link_array<Grob> all (me->pscore_l_->line_l_->column_l_arr ()) ;
set_explicit_neighbor_columns (all);
- prune_loose_colunms (&all);
+
+ Rational global_shortest = find_shortest (me, all);
+ prune_loose_colunms (me, &all, global_shortest);
set_implicit_neighbor_columns (all);
+
int j = 0;
for (int i = 1; i < all.size (); i++)
if (Item::breakable_b (sc))
{
Link_array<Grob> measure (all.slice (j, i+1));
- do_measure (me, &measure);
+ do_measure (global_shortest, me, &measure);
j = i;
}
}
}
-void
-Spacing_spanner::do_measure (Grob*me, Link_array<Grob> *cols)
-{
- Moment shortest_in_measure;
+/*
+ We want the shortest note that is also "common" in the piece, so we
+ find the shortest in each measure, and take the most frequently
+ found duration.
+
+ This probably gives weird effects with modern music, where every
+ note has a different duration, but hey, don't write that kind of
+ stuff, then.
+*/
+Rational
+Spacing_spanner::find_shortest (Grob *me, Link_array<Grob> const &cols)
+{
/*
- space as if this duration is present.
- */
- Moment base_shortest_duration = *unsmob_moment (me->get_grob_property ("maximum-duration-for-spacing"));
+ ascending in duration
+ */
+ Array<Rational> durations;
+ Array<int> counts;
+
+ Rational shortest_in_measure;
shortest_in_measure.set_infinite (1);
-
- for (int i =0 ; i < cols->size (); i++)
+
+ for (int i =0 ; i < cols.size (); i++)
{
- if (Paper_column::musical_b (cols->elem (i)))
+ if (Paper_column::musical_b (cols[i]))
{
- Moment *when = unsmob_moment (cols->elem (i)->get_grob_property ("when"));
+ Moment *when = unsmob_moment (cols[i]->get_grob_property ("when"));
/*
ignore grace notes for shortest notes.
if (when && when->grace_part_)
continue;
- SCM st = cols->elem (i)->get_grob_property ("shortest-starter-duration");
+ SCM st = cols[i]->get_grob_property ("shortest-starter-duration");
Moment this_shortest = *unsmob_moment (st);
- shortest_in_measure = shortest_in_measure <? this_shortest;
+ assert (this_shortest.to_bool());
+ shortest_in_measure = shortest_in_measure <? this_shortest.main_part_;
+ }
+ else if (!shortest_in_measure.infty_b()
+ && Item::breakable_b (cols[i]))
+ {
+ int j = 0;
+ for (; j < durations.size(); j++)
+ {
+ if (durations[j] > shortest_in_measure)
+ {
+ counts.insert (1, j);
+ durations.insert (shortest_in_measure, j);
+ break;
+ }
+ else if (durations[j] == shortest_in_measure)
+ {
+ counts[j]++;
+ break;
+ }
+ }
+
+ if (durations.size() == j)
+ {
+ durations.push (shortest_in_measure);
+ counts.push (1);
+ }
+
+ shortest_in_measure.set_infinite(1);
+ }
+ }
+
+ int max_idx = -1;
+ int max_count = 0;
+ for (int i =durations.size(); i--;)
+ {
+ if (counts[i] >= max_count)
+ {
+ max_idx = i;
+ max_count = counts[i];
}
+
+ // printf ("duration %d/%d, count %d\n", durations[i].num (), durations[i].den (), counts[i]);
}
+
+ SCM bsd = me->get_grob_property ("base-shortest-duration");
+ Rational d = Rational (1,8);
+ if (Moment *m = unsmob_moment (bsd))
+ d = m->main_part_;
- Array<Spring> springs;
+ if (max_idx >= 0)
+ d = d <? durations[max_idx] ;
+
+ return d;
+}
+/*
+ Generate spacing for a single measure. We used to have code that did
+ per-measure spacing. Now we have piecewise spacing. We should fix
+ this to support "spacing-regions": some regions have different notes
+ (different time sigs) than others, and should be spaced differently.
+ */
+void
+Spacing_spanner::do_measure (Rational shortest, Grob*me, Link_array<Grob> *cols)
+{
+
+ Real headwid = gh_scm2double (me->get_grob_property ("spacing-increment"));
for (int i= 0; i < cols->size () - 1; i++)
{
Item * l = dynamic_cast<Item*> (cols->elem (i));
if (!Paper_column::musical_b (l))
{
- breakable_column_spacing (l, r);
+ breakable_column_spacing (me, l, r, shortest);
/*
Item *rb = r->find_prebroken_piece (LEFT);
if (lb)
- breakable_column_spacing (lb,r);
+ breakable_column_spacing (me, lb,r, shortest);
if (rb)
- breakable_column_spacing (l, rb);
+ breakable_column_spacing (me, l, rb, shortest);
if (lb && rb)
- breakable_column_spacing (lb, rb);
+ breakable_column_spacing (me, lb, rb, shortest);
continue ;
}
-
- Real note_space = note_spacing (me,lc, rc, shortest_in_measure <? base_shortest_duration);
- Real hinterfleisch = note_space;
- Real headwid = gh_scm2double (me->get_grob_property ("arithmetic-multiplier"));
-
- SCM seq = lc->get_grob_property ("right-neighbors");
- /*
- hinterfleisch = hind-meat = amount of space following a note.
-
- We adjust the space following a note only if the next note
- happens after the current note (this is set in the grob
- property SPACING-SEQUENCE. */
+ musical_column_spacing (me, lc, rc, headwid, shortest);
+ if (Item *rb = r->find_prebroken_piece (LEFT))
+ musical_column_spacing (me, lc, rb, headwid, shortest);
+ }
+}
- Real stretch_distance = note_space;
- hinterfleisch = -1.0;
- Real max_factor = 0.0;
- for (SCM s = seq; gh_pair_p (s); s = ly_cdr (s))
- {
- Grob * wish = unsmob_grob (gh_car (s));
+/*
+ Generate the space between two musical columns LC and RC, given
+ spacing parameters INCR and SHORTEST.
+ */
+void
+Spacing_spanner::musical_column_spacing (Grob *me, Item * lc, Item *rc, Real increment, Rational shortest)
+{
+ bool expand_only = false;
+ Real base_note_space = note_spacing (me, lc, rc, shortest, &expand_only);
- if (Note_spacing::left_column (wish) != lc
- || Note_spacing::right_column (wish) != rc)
- continue;
+ Real max_note_space = -infinity_f;
+ Real max_fixed_note_space = -infinity_f;
- /*
- This is probably a waste of time in the case of polyphonic
- music. */
- if (Note_spacing::has_interface (wish))
- {
- hinterfleisch = hinterfleisch >?
- ( - headwid +
+ SCM seq = lc->get_grob_property ("right-neighbors");
- (note_space + Note_spacing::get_spacing (wish))
- *gh_scm2double (wish->get_grob_property ("space-factor"))
+ /*
+ We adjust the space following a note only if the next note
+ happens after the current note (this is set in the grob
+ property SPACING-SEQUENCE.
+ */
+ for (SCM s = seq; gh_pair_p (s); s = ly_cdr (s))
+ {
+ Grob * wish = unsmob_grob (gh_car (s));
- + Note_spacing::stem_dir_correction (wish));
- }
- }
+ Item *wish_rcol = Note_spacing::right_column (wish);
+ if (Note_spacing::left_column (wish) != lc
+ || (wish_rcol != rc && wish_rcol != rc->original_l_))
+ continue;
- if (hinterfleisch < 0)
+ /*
+ This is probably a waste of time in the case of polyphonic
+ music. */
+ if (Note_spacing::has_interface (wish))
{
- // maybe should issue a programming error.
- hinterfleisch = note_space;
+ Real space =0.0;
+ Real fixed =0.0;
+
+ Note_spacing::get_spacing (wish, rc, base_note_space, increment, &space, &fixed);
+ max_note_space = max_note_space >? space;
+ max_fixed_note_space = max_fixed_note_space >? fixed;
}
- else
- stretch_distance -= headwid; // why?
+ }
- if (max_factor == 0.0)
- max_factor = 1.0;
-
- Spring s;
- s.distance_f_ = max_factor * hinterfleisch;
- s.strength_f_ = 1 / stretch_distance;
+ if (max_note_space < 0)
+ {
+ max_note_space = base_note_space;
+ max_fixed_note_space = increment;
+ }
- s.item_l_drul_[LEFT] = l;
- s.item_l_drul_[RIGHT] = r;
+ bool ragged = to_boolean (me->paper_l ()->get_scmvar ("raggedright"));
- s.add_to_cols();
- if (r->find_prebroken_piece (LEFT))
- {
- s.item_l_drul_[RIGHT] = r->find_prebroken_piece(LEFT);
- s.add_to_cols();
- }
+ /*
+ Whatever we do, the fixed space is smaller than the real
+ space.
+
+ TODO: this criterion is discontinuous in the derivative.
+ Maybe it should be continuous?
+ */
+ max_fixed_note_space = max_fixed_note_space <? max_note_space;
+
+ Real strength = (ragged) ? 1.0 : 1 / (max_note_space - max_fixed_note_space);
+ Real distance = (ragged) ? max_fixed_note_space : max_note_space;
+ // Spaceable_grob::add_spring (lc, rc, distance, strength, expand_only);
+
+ Spaceable_grob::add_spring (lc, rc, distance, strength, false);
+}
+
+
+/*
+ The one-size-fits all spacing. It doesn't take into account
+ different spacing wishes from one to the next column.
+ */
+void
+Spacing_spanner::standard_breakable_column_spacing (Grob * me, Item*l, Item*r,
+ Real * fixed, Real * space,
+ Moment shortest)
+{
+ *fixed = 0.0;
+ Direction d = LEFT;
+ Drul_array<Item*> cols(l,r);
+
+ do
+ {
+ Interval lext = cols[d]->extent (cols [d], X_AXIS);
+
+ *fixed += -d * lext[-d];
+ }
+ while (flip (&d) != LEFT);
+
+ if (l->breakable_b (l) && r->breakable_b(r))
+ {
+ Moment *dt = unsmob_moment (l->get_grob_property ("measure-length"));
+ Moment mlen (1);
+ if (dt)
+ mlen = *dt;
+
+ Real incr = gh_scm2double (me->get_grob_property ("spacing-increment"));
+
+ *space = *fixed + incr * double (mlen.main_part_ / shortest.main_part_) * 0.8;
}
+ else
+ {
+ Moment dt = Paper_column::when_mom (r) - Paper_column::when_mom (l);
+ bool dummy;
+ *space = *fixed + get_duration_space (me, dt, shortest.main_part_, &dummy);
+ }
+
+
}
/*
- Read hints from L (todo: R) and generate springs.
+ Read hints from L and generate springs.
*/
void
-Spacing_spanner::breakable_column_spacing (Item* l, Item *r)
+Spacing_spanner::breakable_column_spacing (Grob*me, Item* l, Item *r,Moment shortest)
{
Real max_fixed = -infinity_f;
Real max_space = -infinity_f;
+
+ standard_breakable_column_spacing (me, l, r, &max_fixed, &max_space ,
+ shortest);
for (SCM s = l->get_grob_property ("spacing-wishes");
gh_pair_p (s); s = gh_cdr (s))
{
- Grob * spacing_grob = unsmob_grob (gh_car (s));
+ Item * spacing_grob = dynamic_cast<Item*> (unsmob_grob (gh_car (s)));
if (!spacing_grob || !Staff_spacing::has_interface (spacing_grob))
continue;
Real space;
Real fixed_space;
+ /*
+ column for the left one settings should be ok due automatic
+ pointer munging.
+
+ */
+ assert (spacing_grob-> column_l () == l);
+
Staff_spacing::get_spacing_params (spacing_grob,
&space, &fixed_space);
if (space > max_space)
}
}
+
+
+
if (isinf (max_space))
{
- programming_error ("No pref spacing found");
+ /*
+ One situation where this can happen is when there is a column
+ that only serves as a spanning point for a short staff-symbol.
+
+ ===============X===
+
+ |=======Y
+
+
+ (here no StaffSpacing from Y to X is found.)
+ */
+ programming_error ("No StaffSpacing wishes found");
max_space = 2.0;
max_fixed = 1.0;
}
+
- Spring s;
- s.distance_f_ = max_space;
- s.strength_f_ = 1/(max_space - max_fixed);
-
- s.item_l_drul_[LEFT] = l;
- s.item_l_drul_[RIGHT] = r;
+ if (l->break_status_dir() == RIGHT
+ && Paper_column::when_mom (l) == Paper_column::when_mom (r))
+ {
+ /* Start of line: this space is not stretchable */
+ max_fixed = max_space;
+ }
- s.add_to_cols ();
+ /*
+ Hmm. we do 1/0 in the next thing. Perhaps we should check if this
+ works on all architectures.
+ */
+
+ bool ragged = to_boolean (me->paper_l ()->get_scmvar ("raggedright"));
+ Real strength = (ragged) ? 1.0 : 1 / (max_space - max_fixed);
+ Real distance = (ragged) ? max_fixed : max_space;
+ Spaceable_grob::add_spring (l, r, distance, strength, false);
}
/**
Get the measure wide ant for arithmetic spacing.
-
- @see
- John S. Gourlay. ``Spacing a Line of Music,'' Technical Report
- OSU-CISRC-10/87-TR35, Department of Computer and Information Science,
- The Ohio State University, 1987.
-
*/
Real
-Spacing_spanner::get_duration_space (Grob*me, Moment d, Moment shortest)
+Spacing_spanner::get_duration_space (Grob*me, Moment d, Rational shortest, bool * expand_only)
{
- Real log = log_2 (shortest.main_part_);
- Real k = gh_scm2double (me->get_grob_property ("arithmetic-basicspace"))
- - log;
-
- Rational compdur = d.main_part_ + d.grace_part_ /Rational (3);
+ Real k = gh_scm2double (me->get_grob_property ("shortest-duration-space"));
+ Real incr = gh_scm2double (me->get_grob_property ("spacing-increment"));
- return (log_2 (compdur) + k) * gh_scm2double (me->get_grob_property ("arithmetic-multiplier"));
-}
+ if (d < shortest)
+ {
+ /*
+ We don't space really short notes using the log of the
+ duration, since it would disproportionally stretches the long
+ notes in a piece. In stead, we use geometric spacing with constant 0.5
+ (i.e. linear.)
+
+ This should probably be tunable, to use other base numbers.
+
+ In Mozart hrn3 by EB., we have 8th note = 3.9 mm (total), 16th note =
+ 3.6 mm (total). head-width = 2.4, so we 1.2mm for 16th, 1.5
+ mm for 8th. (white space), suggesting that we use
+
+ (1.2 / 1.5)^{-log2(duration ratio)}
+
+ */
+ Rational ratio = d.main_part_ / shortest;
+
+ *expand_only = true;
+ return ((k-1) + double (ratio)) * incr;
+ }
+ else
+ {
+ /*
+ John S. Gourlay. ``Spacing a Line of Music,'' Technical
+ Report OSU-CISRC-10/87-TR35, Department of Computer and
+ Information Science, The Ohio State University, 1987.
+ */
+ Real log = log_2 (shortest);
+ k -= log;
+ Rational compdur = d.main_part_ + d.grace_part_ /Rational (3);
+ *expand_only = false;
+
+ return (log_2 (compdur) + k) * incr;
+ }
+}
Real
Spacing_spanner::note_spacing (Grob*me, Grob *lc, Grob *rc,
- Moment shortest)
+ Moment shortest, bool * expand_only)
{
Moment shortest_playing_len = 0;
SCM s = lc->get_grob_property ("shortest-playing-duration");
-
if (unsmob_moment (s))
shortest_playing_len = *unsmob_moment (s);
programming_error ("can't find a ruling note at " + Paper_column::when_mom (lc).str ());
shortest_playing_len = 1;
}
-
- if (! shortest.to_bool ())
- {
- programming_error ("no minimum in measure at " + Paper_column::when_mom (lc).str ());
- shortest = 1;
- }
- Moment delta_t = Paper_column::when_mom (rc) - Paper_column::when_mom (lc);
+
+ Moment lwhen = Paper_column::when_mom (lc);
+ Moment rwhen = Paper_column::when_mom (rc);
+
+ Moment delta_t = rwhen - lwhen;
Real dist = 0.0;
- if (delta_t.main_part_)
+ /*
+ In normal situations, the next column is at most
+ SHORTEST_PLAYING_LEN away. However chord-tremolos do funky faking stuff
+ with durations, invalidating this assumption. Here we kludge
+ around to get chord tremolos to behave properly.
+
+ */
+ shortest_playing_len = shortest_playing_len >? delta_t;
+ if (delta_t.main_part_ && !lwhen.grace_part_)
{
- dist = get_duration_space (me, shortest_playing_len, shortest);
+ dist = get_duration_space (me, shortest_playing_len, shortest.main_part_, expand_only);
dist *= (double) (delta_t.main_part_ / shortest_playing_len.main_part_);
}
else if (delta_t.grace_part_)
{
- dist = get_duration_space (me, shortest, shortest);
+ /*
+ TODO: figure out how to space grace notes.
+ */
+ dist = get_duration_space (me, shortest, shortest.main_part_, expand_only);
Real grace_fact = 1.0;
SCM gf = me->get_grob_property ("grace-space-factor");
if (gh_number_p (gf))
grace_fact = gh_scm2double (gf);
- dist *= grace_fact;
+ dist *= grace_fact;
}
-#if 0
- /*
- TODO: figure out how to space grace notes.
- */
+
+ return dist;
+}
- dist *=
- + grace_fact * (double) (delta_t.grace_part_ / shortest_playing_len.main_part_);
- Moment *lm = unsmob_moment (lc->get_grob_property ("when"));
- Moment *rm = unsmob_moment (rc->get_grob_property ("when"));
+ADD_INTERFACE (Spacing_spanner,"spacing-spanner-interface",
+ "
+The space taken by a note is dependent on its duration. Doubling a
+duration adds spacing-increment to the space. The most common shortest
+note gets shortest-duration-space. Notes that are even shorter are
+spaced proportonial to their duration.
- if (lm && rm)
- {
- if (lm->grace_part_ && rm->grace_part_)
- dist *= 0.5;
- else if (!rm->grace_part_ && lm->grace_part_)
- dist *= 0.7;
- }
-#endif
-
- return dist;
-}
+Typically, the increment is the width of a black note head. In a
+piece with lots of 8th notes, and some 16th notes, the eighth note
+gets 2 note heads width (i.e. the space following a note is 1 note
+head width) A 16th note is followed by 0.5 note head width. The
+quarter note is followed by 3 NHW, the half by 4 NHW, etc.
+",
+ "grace-space-factor spacing-increment base-shortest-duration shortest-duration-space");
+
+
+
+ADD_INTERFACE (Spacing_interface,"spacing-interface",
+ "Something to do with line breaking and spacing. Kill this one after determining line breaks.",
+ "");