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/*
This file is part of LilyPond, the GNU music typesetter.
Copyright (C) 1997--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 "note-column.hh"
#include <cmath> // ceil
using namespace std;
#include "accidental-placement.hh"
#include "axis-group-interface.hh"
#include "directional-element-interface.hh"
#include "international.hh"
#include "item.hh"
#include "note-head.hh"
#include "output-def.hh"
#include "pointer-group-interface.hh"
#include "rest.hh"
#include "staff-symbol-referencer.hh"
#include "stem.hh"
#include "warn.hh"
/*
TODO: figure out if we can prune this class. This is just an
annoying layer between (rest)collision & (note-head + stem)
*/
bool
Note_column::has_rests (Grob *me)
{
return unsmob<Grob> (me->get_object ("rest"));
}
bool
Note_column::shift_less (Grob *const &p1, Grob *const &p2)
{
SCM s1 = p1->get_property ("horizontal-shift");
SCM s2 = p2->get_property ("horizontal-shift");
int h1 = (scm_is_number (s1)) ? scm_to_int (s1) : 0;
int h2 = (scm_is_number (s2)) ? scm_to_int (s2) : 0;
return h1 < h2;
}
Item *
Note_column::get_stem (Grob *me)
{
SCM s = me->get_object ("stem");
return unsmob<Item> (s);
}
Item *
Note_column::get_flag (Grob *me)
{
Item *stem = get_stem (me);
if (stem)
{
SCM s = stem->get_object ("flag");
return unsmob<Item> (s);
}
return 0;
}
Slice
Note_column::head_positions_interval (Grob *me)
{
Slice iv;
iv.set_empty ();
extract_grob_set (me, "note-heads", heads);
for (vsize i = 0; i < heads.size (); i++)
{
Grob *se = heads[i];
int j = Staff_symbol_referencer::get_rounded_position (se);
iv.unite (Slice (j, j));
}
return iv;
}
Direction
Note_column::dir (Grob *me)
{
Grob *stem = unsmob<Grob> (me->get_object ("stem"));
if (has_interface<Stem> (stem))
return get_grob_direction (stem);
else
{
extract_grob_set (me, "note-heads", heads);
if (heads.size ())
return (Direction)sign (head_positions_interval (me).center ());
}
if (has_interface<Note_column> (me))
programming_error ("Note_column without heads and stem");
else
programming_error ("dir() given grob without Note_column interface");
return CENTER;
}
void
Note_column::set_stem (Grob *me, Grob *stem)
{
me->set_object ("stem", stem->self_scm ());
Axis_group_interface::add_element (me, stem);
}
Grob *
Note_column::get_rest (Grob *me)
{
return unsmob<Grob> (me->get_object ("rest"));
}
void
Note_column::add_head (Grob *me, Grob *h)
{
bool both = false;
if (has_interface<Rest> (h))
{
extract_grob_set (me, "note-heads", heads);
if (heads.size ())
both = true;
else
me->set_object ("rest", h->self_scm ());
}
else if (has_interface<Note_head> (h))
{
if (unsmob<Grob> (me->get_object ("rest")))
both = true;
Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-heads"), h);
}
if (both)
me->warning (_ ("cannot have note heads and rests together on a stem"));
else
Axis_group_interface::add_element (me, h);
}
Grob *
Note_column::first_head (Grob *me)
{
Grob *st = get_stem (me);
return st ? Stem::first_head (st) : 0;
}
/*
Return extent of the noteheads in the "main column",
(i.e. excluding any suspended noteheads), or extent
of the rest (if there are no heads).
*/
Interval
Note_column::calc_main_extent (Grob *me)
{
Grob *main_head = 0;
if (get_stem (me))
main_head = first_head (me);
else
{
// no stems => no suspended noteheads.
extract_grob_set (me, "note-heads", heads);
if (heads.size())
main_head = heads[0];
}
Grob *main_item = main_head
? main_head
: unsmob<Grob> (me->get_object ("rest"));
return main_item
? main_item->extent (me, X_AXIS)
: Interval (0, 0);
}
/*
Return the first AccidentalPlacement grob that we find in a note-head.
*/
Grob *
Note_column::accidentals (Grob *me)
{
extract_grob_set (me, "note-heads", heads);
Grob *acc = 0;
for (vsize i = 0; i < heads.size (); i++)
{
Grob *h = heads[i];
acc = h ? unsmob<Grob> (h->get_object ("accidental-grob")) : 0;
if (acc)
break;
}
if (!acc)
return 0;
if (has_interface<Accidental_placement> (acc->get_parent (X_AXIS)))
return acc->get_parent (X_AXIS);
/* compatibility. */
return acc;
}
Grob *
Note_column::dot_column (Grob *me)
{
extract_grob_set (me, "note-heads", heads);
for (vsize i = 0; i < heads.size (); i++)
{
Grob *dots = unsmob<Grob> (heads[i]->get_object ("dot"));
if (dots)
return dots->get_parent (X_AXIS);
}
return 0;
}
/* If a note-column contains a cross-staff stem then
nc->extent (Y_AXIS, refp) will not consider the extent of the stem.
If you want the extent of the stem to be included (and you are safe
from any cross-staff issues) then call this function instead. */
Interval
Note_column::cross_staff_extent (Grob *me, Grob *refp)
{
Interval iv = me->extent (refp, Y_AXIS);
if (Grob *s = get_stem (me))
iv.unite (s->extent (refp, Y_AXIS));
return iv;
}
ADD_INTERFACE (Note_column,
"Stem and noteheads combined.",
/* properties */
"force-hshift "
"horizontal-shift "
"ignore-collision "
"note-heads "
"rest "
"rest-collision "
"stem "
);
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