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/*
hairpin.cc -- implement Hairpin
source file of the GNU LilyPond music typesetter
(c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "hairpin.hh"
#include "staff-symbol-referencer.hh"
#include "line-interface.hh"
#include "spanner.hh"
#include "font-interface.hh"
#include "dimensions.hh"
#include "output-def.hh"
#include "warn.hh"
#include "paper-column.hh"
#include "lookup.hh"
#include "text-interface.hh"
MAKE_SCHEME_CALLBACK(Hairpin,after_line_breaking,1);
SCM
Hairpin::after_line_breaking (SCM smob)
{
Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
Drul_array<bool> broken;
Drul_array<Item *> bounds;
Direction d = LEFT;
do
{
bounds[d] = me->get_bound (d);
broken[d] = bounds[d]->break_status_dir () != CENTER;
}
while (flip (&d) != LEFT);
if (broken[LEFT]
&& ly_is_equal (bounds[RIGHT]->get_column ()->get_property ("when"),
bounds[LEFT]->get_property ("when")))
{
me->suicide ();
}
return SCM_UNSPECIFIED;
}
MAKE_SCHEME_CALLBACK (Hairpin, print, 1);
SCM
Hairpin::print (SCM smob)
{
Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
SCM s = me->get_property ("grow-direction");
if (!is_direction (s))
{
me->suicide ();
return SCM_EOL;
}
Direction grow_dir = to_dir (s);
Real padding = robust_scm2double (me->get_property ("bound-padding"), 0.5);
Drul_array<bool> broken;
Drul_array<Item *> bounds;
Direction d = LEFT;
do
{
bounds[d] = me->get_bound (d);
broken[d] = bounds[d]->break_status_dir () != CENTER;
}
while (flip (&d) != LEFT);
Grob *common = bounds[LEFT]->common_refpoint (bounds[RIGHT], X_AXIS);
Drul_array<Real> x_points;
do
{
Item *b = bounds[d];
x_points[d] = b->relative_coordinate (common, X_AXIS);
if (broken [d])
{
if (d == LEFT)
x_points[d] = b->extent (common, X_AXIS)[RIGHT];
}
else
{
if (Text_interface::has_interface (b))
{
Interval e = b->extent (common, X_AXIS);
if (!e.is_empty ())
x_points[d] = e[-d] - d * padding;
}
else
{
bool neighbor_found = false;
for (SCM adj = me->get_property ("adjacent-hairpins");
scm_is_pair (adj); adj = scm_cdr (adj))
{
/*
FIXME: this will fuck up in case of polyphonic
notes in other voices. Need to look at note-columns
in the current staff/voice.
*/
Spanner *pin = unsmob_spanner (scm_car (adj));
if (pin
&& (pin->get_bound (LEFT)->get_column () == b->get_column ()
|| pin->get_bound (RIGHT)->get_column () == b->get_column ()))
neighbor_found = true;
}
/*
If we're hung on a paper column, that means we're not
adjacent to a text-dynamic, and we may move closer. We
make the padding a little smaller, here.
*/
Interval e = robust_relative_extent (b, common, X_AXIS);
x_points[d]
= neighbor_found ? e.center () - d * padding / 3 : e[d];
}
}
}
while (flip (&d) != LEFT);
Real width = x_points[RIGHT] - x_points[LEFT];
if (width < 0)
{
me->warning (_ ((grow_dir < 0) ? "decrescendo too small"
: "crescendo too small"));
width = 0;
}
bool continued = broken[Direction (-grow_dir)];
Real height = robust_scm2double (me->get_property ("height"), 0.2) *
Staff_symbol_referencer::staff_space (me);
Real starth, endh;
if (grow_dir < 0)
{
starth = height;
endh = continued ? height / 2 : 0.0;
}
else
{
starth = continued ? height / 2 : 0.0;
endh = height;
}
/*
should do relative to staff-symbol staff-space?
*/
Stencil mol;
mol = Line_interface::line (me, Offset (0, starth), Offset (width, endh));
mol.add_stencil (Line_interface::line (me,
Offset (0, -starth),
Offset (width, -endh)));
mol.translate_axis (x_points[LEFT]
- bounds[LEFT]->relative_coordinate (common, X_AXIS),
X_AXIS);
return mol.smobbed_copy ();
}
ADD_INTERFACE (Hairpin, "hairpin-interface",
"A hairpin (de)crescendo.",
"grow-direction height bound-padding adjacent-hairpins");
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