(c) 1999 Glen Prideaux <glenprideaux@iname.com>
- (adapted from lyric-extender)
+ (adapted from lyric-extender)
*/
#include <math.h>
#include "spanner.hh"
#include "item.hh"
-MAKE_SCHEME_CALLBACK(Hyphen_spanner,brew_molecule,1)
+MAKE_SCHEME_CALLBACK (Hyphen_spanner,brew_molecule,1)
SCM
Hyphen_spanner::brew_molecule (SCM smob)
{
- Spanner * sp = dynamic_cast<Spanner*> (unsmob_element (smob));
+ Spanner * sp = unsmob_spanner (smob);
Grob * common = sp;
Direction d = LEFT;
do
{
- common = common->common_refpoint( sp->get_bound (d), X_AXIS);
+ common = common->common_refpoint (sp->get_bound (d), X_AXIS);
}
while (flip (&d) != LEFT);
Interval bounds;
do
{
- bounds[d] = sp->get_bound (d)->extent (common, X_AXIS)[-d];
+ Interval iv = sp->get_bound (d)->extent (common, X_AXIS);
+
+ bounds[d] = iv.empty_b ()
+ ? sp->get_bound (d)->relative_coordinate (common, X_AXIS)
+ : iv[-d];
}
while (flip (&d) != LEFT);
- Real lt = sp->paper_l ()->get_var ("stafflinethickness");
+ Real lt = sp->paper_l ()->get_var ("linethickness");
Real th = gh_scm2double (sp->get_grob_property ("thickness")) * lt ;
Real h = gh_scm2double (sp->get_grob_property ("height"));
+
+ // interval?
Real l = gh_scm2double (sp->get_grob_property ("minimum-length"));
+ Real x = gh_scm2double (sp->get_grob_property ("maximum-length"));
// The hyphen can exist in the word space of the left lyric ...
SCM space = sp->get_bound (LEFT)->get_grob_property ("word-space");
if (gh_number_p (space))
{
bounds[LEFT] -= gh_scm2double (space);
}
- Real w = bounds.length ();
+
+ /*
+ we should probably do something more intelligent when bounds is
+ empty, but at least this doesn't crash.
+ */
+ Real w = bounds.empty_b () ? 0 : bounds.length ();
+
/* for length, use a geometric mean of the available space and some minimum
- */
- if(l < w)
- l = sqrt(l*w);
+ */
+ if (l < w)
+ {
+ l = sqrt (l*w);
+ if (l > x)
+ l = x;
+ }
else
{
/* OK, we have a problem. Usually this means that we're on the
the offset for stuff */
/* This test for being on the first column has been shamelessly
ripped from spanner.cc */
- Paper_column *sc = dynamic_cast<Paper_column*> (sp->get_bound(LEFT)->column_l());
+ Paper_column *sc = dynamic_cast<Paper_column*> (sp->get_bound (LEFT)->column_l ());
if (sc != NULL &&
sc->break_status_dir () == RIGHT)
{
l = w;
}
}
- Box b (Interval (-l/2,l/2), Interval (h,h+th));
+ Box b (Interval (-l/2,l/2), Interval (h,h+th));
Molecule mol (Lookup::filledbox (b));
- mol.translate_axis (bounds.center ()
- -sp->relative_coordinate (common, X_AXIS),
- X_AXIS);
+ Real ct = bounds.empty_b () ? 0 : bounds.center () ;
+ mol.translate_axis (ct -sp->relative_coordinate (common, X_AXIS), X_AXIS);
return mol.smobbed_copy ();
}
elt_l_ = s;
}
+
+
+ADD_INTERFACE (Hyphen_spanner, "lyric-hyphen-interface",
+ "A centred hyphen is a simple line between lyrics used to divide
+syllables. The length of the hyphen line should stretch based on the
+size of the gap between syllables.",
+ "thickness height minimum-length maximum-length word-space");
+