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/*
arpeggio.cc -- implement Arpeggio
source file of the GNU LilyPond music typesetter
(c) 2000--2007 Jan Nieuwenhuizen <janneke@gnu.org>
*/
#include "arpeggio.hh"
#include "bezier.hh"
#include "font-interface.hh"
#include "grob.hh"
#include "lookup.hh"
#include "output-def.hh"
#include "pointer-group-interface.hh"
#include "staff-symbol-referencer.hh"
#include "staff-symbol.hh"
#include "stem.hh"
#include "warn.hh"
Grob *
Arpeggio::get_common_y (Grob *me)
{
Grob *common = me;
extract_grob_set (me, "stems", stems);
for (vsize i = 0; i < stems.size (); i++)
{
Grob *stem = stems[i];
common = common->common_refpoint (Staff_symbol_referencer::get_staff_symbol (stem),
Y_AXIS);
}
return common;
}
MAKE_SCHEME_CALLBACK(Arpeggio, calc_positions, 1);
SCM
Arpeggio::calc_positions (SCM grob)
{
Grob *me = unsmob_grob (grob);
Grob *common = get_common_y (me);
/*
TODO:
Using stems here is not very convenient; should store noteheads
instead, and also put them into the support. Now we will mess up
in vicinity of a collision.
*/
Interval heads;
Real my_y = me->relative_coordinate (common, Y_AXIS);
extract_grob_set (me, "stems", stems);
for (vsize i = 0; i < stems.size (); i++)
{
Grob *stem = stems[i];
Grob *ss = Staff_symbol_referencer::get_staff_symbol (stem);
Interval iv = Stem::head_positions (stem);
iv *= Staff_symbol::staff_space (ss) / 2.0;
heads.unite (iv + ss->relative_coordinate (common, Y_AXIS)
- my_y);
}
heads *= 1/Staff_symbol_referencer::staff_space(me);
return ly_interval2scm (heads);
}
MAKE_SCHEME_CALLBACK (Arpeggio, print, 1);
SCM
Arpeggio::print (SCM smob)
{
Grob *me = unsmob_grob (smob);
Interval heads = robust_scm2interval (me->get_property ("positions"),
Interval())
* Staff_symbol_referencer::staff_space (me);
if (heads.is_empty () || heads.length () < 0.5)
{
if (!to_boolean (me->get_property ("transparent")))
{
me->warning ("no heads for arpeggio found?");
me->suicide ();
}
return SCM_EOL;
}
SCM ad = me->get_property ("arpeggio-direction");
Direction dir = CENTER;
if (is_direction (ad))
dir = to_dir (ad);
Stencil mol;
Font_metric *fm = Font_interface::get_default_font (me);
Stencil squiggle = fm->find_by_name ("scripts.arpeggio");
Stencil arrow;
if (dir)
{
arrow = fm->find_by_name ("scripts.arpeggio.arrow." + to_string (dir));
heads[dir] -= dir * arrow.extent (Y_AXIS).length ();
}
for (Real y = heads[LEFT]; y < heads[RIGHT];
y += squiggle.extent (Y_AXIS).length ())
mol.add_at_edge (Y_AXIS, UP, squiggle, 0.0);
mol.translate_axis (heads[LEFT], Y_AXIS);
if (dir)
mol.add_at_edge (Y_AXIS, dir, arrow, 0);
return mol.smobbed_copy ();
}
/* Draws a vertical bracket to the left of a chord
Chris Jackson <chris@fluffhouse.org.uk> */
MAKE_SCHEME_CALLBACK (Arpeggio, brew_chord_bracket, 1);
SCM
Arpeggio::brew_chord_bracket (SCM smob)
{
Grob *me = unsmob_grob (smob);
Interval heads = robust_scm2interval (me->get_property ("positions"),
Interval())
* Staff_symbol_referencer::staff_space (me);
Real lt = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
Real sp = 1.5 * Staff_symbol_referencer::staff_space (me);
Real dy = heads.length () + sp;
Real x = 0.7;
Stencil mol (Lookup::bracket (Y_AXIS, Interval (0, dy), lt, x, lt));
mol.translate_axis (heads[LEFT] - sp / 2.0, Y_AXIS);
return mol.smobbed_copy ();
}
MAKE_SCHEME_CALLBACK (Arpeggio, brew_chord_slur, 1);
SCM
Arpeggio::brew_chord_slur (SCM smob)
{
Grob *me = unsmob_grob (smob);
Interval heads = robust_scm2interval (me->get_property ("positions"),
Interval())
* Staff_symbol_referencer::staff_space (me);
Real lt = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
Real dy = heads.length ();
Real height_limit = 1.5;
Real ratio = .33;
Bezier curve = slur_shape (dy, height_limit, ratio);
curve.rotate (M_PI / 2);
Stencil mol (Lookup::slur (curve, lt, lt));
mol.translate_axis (heads[LEFT], Y_AXIS);
return mol.smobbed_copy ();
}
/*
We have to do a callback, because print () triggers a
vertical alignment if it is cross-staff.
*/
MAKE_SCHEME_CALLBACK (Arpeggio, width, 1);
SCM
Arpeggio::width (SCM smob)
{
Grob *me = unsmob_grob (smob);
Stencil arpeggio = Font_interface::get_default_font (me)->find_by_name ("scripts.arpeggio");
return ly_interval2scm (arpeggio.extent (X_AXIS));
}
MAKE_SCHEME_CALLBACK (Arpeggio, height, 1);
SCM
Arpeggio::height (SCM smob)
{
return Grob::stencil_height (smob);
}
MAKE_SCHEME_CALLBACK (Arpeggio, pure_height, 3);
SCM
Arpeggio::pure_height (SCM smob, SCM, SCM)
{
Grob *me = unsmob_grob (smob);
if (to_boolean (me->get_property ("cross-staff")))
return ly_interval2scm (Interval ());
return height (smob);
}
ADD_INTERFACE (Arpeggio,
"Functions and settings for drawing an arpeggio symbol (a"
" wavy line left to noteheads.",
/* properties */
"arpeggio-direction "
"positions "
"script-priority " // TODO: make around-note-interface
"stems "
);
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