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/*
This file is part of LilyPond, the GNU music typesetter.
Copyright (C) 2003--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
LilyPond is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LilyPond is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "lyric-hyphen.hh"
#include "axis-group-interface.hh"
#include "lookup.hh"
#include "output-def.hh"
#include "paper-column.hh"
#include "moment.hh"
#include "spanner.hh"
/*
TODO: should extract hyphen dimensions or hyphen glyph from the
font.
*/
MAKE_SCHEME_CALLBACK (Lyric_hyphen, print, 1);
SCM
Lyric_hyphen::print (SCM smob)
{
Spanner *me = unsmob<Spanner> (smob);
Drul_array<Item *> bounds (me->get_bound (LEFT),
me->get_bound (RIGHT));
if (bounds[LEFT]->break_status_dir ()
&& (Paper_column::when_mom (bounds[LEFT])
== Paper_column::when_mom (bounds[RIGHT]->get_column ())))
return SCM_EOL;
Grob *common = bounds[LEFT]->common_refpoint (bounds[RIGHT], X_AXIS);
Interval span_points;
for (LEFT_and_RIGHT (d))
{
Interval iv = Axis_group_interface::generic_bound_extent (bounds[d], common, X_AXIS);
span_points[d] = iv.is_empty ()
? bounds[d]->relative_coordinate (common, X_AXIS)
: iv[-d];
}
Real lt = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
Real th = robust_scm2double (me->get_property ("thickness"), 1) * lt;
Real font_size_step = robust_scm2double (me->get_property ("font-size"), 0.0);
Real h = robust_scm2double (me->get_property ("height"), 0.5)
* pow (2.0, font_size_step / 6.0);
// interval?
Real dash_period = robust_scm2double (me->get_property ("dash-period"), 1.0);
Real dash_length = robust_scm2double (me->get_property ("length"), .5);
Real padding = robust_scm2double (me->get_property ("padding"), 0.1);
if (dash_period < dash_length)
dash_period = 1.5 * dash_length;
Real l = span_points.length ();
int n = int (ceil (l / dash_period - 0.5));
if (n <= 0)
n = 1;
if (l < dash_length + 2 * padding
&& !bounds[RIGHT]->break_status_dir ())
{
Real minimum_length = robust_scm2double (me->get_property ("minimum-length"), .3);
dash_length = max ((l - 2 * padding), minimum_length);
}
Real space_left = l - dash_length - (n - 1) * dash_period;
/*
If there is not enough space, the hyphen should disappear, but not
at the end of the line.
*/
if (space_left < 0.0
&& !bounds[RIGHT]->break_status_dir ())
return SCM_EOL;
space_left = max (space_left, 0.0);
Box b (Interval (0, dash_length), Interval (h, h + th));
Stencil dash_mol (Lookup::round_filled_box (b, 0.8 * lt));
Stencil total;
for (int i = 0; i < n; i++)
{
Stencil m (dash_mol);
m.translate_axis (span_points[LEFT] + i * dash_period + space_left / 2, X_AXIS);
total.add_stencil (m);
}
total.translate_axis (-me->relative_coordinate (common, X_AXIS), X_AXIS);
return total.smobbed_copy ();
}
MAKE_SCHEME_CALLBACK (Lyric_hyphen, set_spacing_rods, 1);
SCM
Lyric_hyphen::set_spacing_rods (SCM smob)
{
Grob *me = unsmob<Grob> (smob);
Rod r;
Spanner *sp = dynamic_cast<Spanner *> (me);
r.distance_ = robust_scm2double (me->get_property ("minimum-distance"), 0);
for (LEFT_and_RIGHT (d))
{
r.item_drul_[d] = sp->get_bound (d);
if (r.item_drul_[d])
r.distance_ += -d * r.item_drul_[d]->extent (r.item_drul_[d], X_AXIS)[-d];
}
if (r.item_drul_[LEFT]
&& r.item_drul_[RIGHT])
r.add_to_cols ();
return SCM_UNSPECIFIED;
}
ADD_INTERFACE (Lyric_hyphen,
"A centered hyphen is simply a line between lyrics used to"
" divide syllables.",
/* properties */
"dash-period "
"height "
"length "
"minimum-distance "
"minimum-length "
"padding "
"thickness "
);
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