source file of the GNU LilyPond music typesetter
- (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 2005--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "spacing-spanner.hh"
+
+#include "spacing-options.hh"
#include "moment.hh"
#include "paper-column.hh"
#include "warn.hh"
+#include "pointer-group-interface.hh"
+#include "system.hh"
+#include "spacing-interface.hh"
+#include "spring.hh"
/*
LilyPond spaces by taking a simple-minded spacing algorithm, and
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,
- Spacing_options const *options)
+Spring
+Spacing_spanner::standard_breakable_column_spacing (Grob *me, Item *l, Item *r, Spacing_options const *options)
{
- *fixed = 0.0;
- Direction d = LEFT;
- Drul_array<Item *> cols (l, r);
-
- do
- {
- if (!Paper_column::is_musical (cols[d]))
- {
- /*
- Tied accidentals over barlines cause problems, so lets see
- what happens if we do this for non musical columns only.
- */
- Interval lext = cols[d]->extent (cols [d], X_AXIS);
- if (!lext.is_empty ())
- *fixed += -d * lext[-d];
- }
- }
- while (flip (&d) != LEFT);
+ Real min_dist = max (0.0, Paper_column::minimum_distance (l, r));
+ Real ideal;
if (Paper_column::is_breakable (l) && Paper_column::is_breakable (r))
{
Real incr = robust_scm2double (me->get_property ("spacing-increment"), 1);
- *space = *fixed + incr * double (mlen.main_part_ / options->global_shortest_) * 0.8;
+ ideal = min_dist + incr * double (mlen.main_part_ / options->global_shortest_) * 0.8;
}
else
{
In this case, Staff_spacing should handle the job,
using dt when it is 0 is silly.
*/
- *space = *fixed + 0.5;
+ ideal = min_dist + 0.5;
}
else
+ ideal = min_dist + options->get_duration_space (dt.main_part_);
+ }
+ return Spring (ideal, min_dist);
+}
+
+Moment *
+get_measure_length (Grob *column)
+{
+ Grob * sys = column->get_parent (X_AXIS);
+
+ extract_grob_set (sys, "columns", cols);
+
+ vsize col_idx = Paper_column::get_rank (column);
+
+ do
+ {
+ if (Moment *len = unsmob_moment (cols[col_idx]->get_property ("measure-length")))
{
- bool dummy;
- *space = *fixed + options->get_duration_space (dt.main_part_, &dummy);
+ return len;
}
}
+ while (col_idx-- != 0);
+
+ return 0;
}
Real
Spacing_spanner::note_spacing (Grob *me, Grob *lc, Grob *rc,
- Spacing_options const *options,
- bool *expand_only)
+ Spacing_options const *options)
{
(void) me;
if (! shortest_playing_len.to_bool ())
{
- programming_error ("can't find a ruling note at " + Paper_column::when_mom (lc).to_string ());
+ programming_error ("cannot find a ruling note at: " + Paper_column::when_mom (lc).to_string ());
shortest_playing_len = 1;
}
Moment rwhen = Paper_column::when_mom (rc);
Moment delta_t = rwhen - lwhen;
- if (!Paper_column::is_musical (rc))
+
+ /*
+ when toying with mmrests, it is possible to have musical
+ column on the left and non-musical on the right, spanning
+ several measures.
+
+ TODO: efficiency: measure length can be cached, or stored as
+ property in paper-column.
+ */
+
+ if (Moment *measure_len = get_measure_length (lc))
{
+ delta_t = min (delta_t, *measure_len);
+
/*
- when toying with mmrests, it is possible to have musical
- column on the left and non-musical on the right, spanning
- several measures.
+ The following is an extra safety measure, such that
+ the length of a mmrest event doesn't cause havoc.
*/
-
- Moment *dt = unsmob_moment (rc->get_property ("measure-length"));
- if (dt)
- {
- delta_t = min (delta_t, *dt);
-
- /*
- The following is an extra safety measure, such that
- the length of a mmrest event doesn't cause havoc.
- */
- shortest_playing_len = min (shortest_playing_len, *dt);
- }
+ shortest_playing_len = min (shortest_playing_len, *measure_len);
}
Real dist = 0.0;
if (delta_t.main_part_ && !lwhen.grace_part_)
{
- dist = options->get_duration_space (shortest_playing_len.main_part_,
- expand_only);
+ dist = options->get_duration_space (shortest_playing_len.main_part_);
dist *= double (delta_t.main_part_ / shortest_playing_len.main_part_);
}
else if (delta_t.grace_part_)
available (namely the space for the global shortest note), and
multiply that by grace-space-factor
*/
- dist = options->get_duration_space (options->global_shortest_, expand_only) / 2.0;
+ dist = options->get_duration_space (options->global_shortest_) / 2.0;
Grob *grace_spacing = unsmob_grob (lc->get_object ("grace-spacing"));
if (grace_spacing)
{
Spacing_options grace_opts;
grace_opts.init_from_grob (grace_spacing);
-
- bool bla;
- dist = grace_opts.get_duration_space (delta_t.grace_part_, &bla);
+ dist = grace_opts.get_duration_space (delta_t.grace_part_);
}
}
projects / lilypond.git / blobdiff