/*
- staff-symbol-referencer.cc -- implement Staff_symbol_referencer
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1999--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1999--2005 Han-Wen Nienhuys <hanwen@cs.uu.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 "staff-symbol-referencer.hh"
-#include <math.h>
-
#include "staff-symbol.hh"
+#include "grob.hh"
#include "output-def.hh"
#include "libc-extension.hh"
int
Staff_symbol_referencer::line_count (Grob *me)
{
- Grob *st = get_staff_symbol (me);
- return st ? Staff_symbol::line_count (st) : 0;
+ Grob *st = get_staff_symbol (me);
+ return st ? Staff_symbol::line_count (st) : 0;
}
bool
-Staff_symbol_referencer::on_staffline (Grob *me)
+Staff_symbol_referencer::on_line (Grob *me, int pos)
{
- return on_staffline (me, (int) rint (get_position (me)));
+ Grob *st = get_staff_symbol (me);
+ return st ? Staff_symbol::on_line (st, pos) : false;
}
-/*
- This does not take size into account.
- maybe rename: on_virtual_staffline, on_staff_or_ledger_line?
- */
bool
-Staff_symbol_referencer::on_staffline (Grob *me, int pos)
+Staff_symbol_referencer::on_staff_line (Grob *me, int pos)
{
- int sz = line_count (me) - 1;
- return ((pos + sz) % 2) == 0;
+ Grob *st = get_staff_symbol (me);
+ return st ? Staff_symbol::on_line (st, pos, false) : false;
}
-Grob*
+Grob *
Staff_symbol_referencer::get_staff_symbol (Grob *me)
{
if (Staff_symbol::has_interface (me))
return me;
-
- SCM st = me->get_property ("staff-symbol");
+
+ SCM st = me->get_object ("staff-symbol");
return unsmob_grob (st);
}
Grob *st = get_staff_symbol (me);
if (st)
return Staff_symbol::get_line_thickness (st);
- return me->get_layout ()->get_dimension (ly_symbol2scm ("linethickness"));
+ return me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
}
Real
Staff_symbol_referencer::get_position (Grob *me)
+{
+ return internal_get_position (me, false);
+}
+
+Real
+Staff_symbol_referencer::pure_get_position (Grob *me)
+{
+ return internal_get_position (me, true);
+}
+
+Real
+Staff_symbol_referencer::internal_get_position (Grob *me, bool pure)
{
Real p = 0.0;
Grob *st = get_staff_symbol (me);
Grob *c = st ? me->common_refpoint (st, Y_AXIS) : 0;
if (st && c)
{
- Real y = me->relative_coordinate (c, Y_AXIS)
- - st->relative_coordinate (c, Y_AXIS);
-
- p += 2.0 * y / Staff_symbol::staff_space (st);
+ Real y = (pure
+ ? me->pure_relative_y_coordinate (c, 0, INT_MAX)
+ : me->relative_coordinate (c, Y_AXIS))
+ - st->relative_coordinate (c, Y_AXIS);
+ Real space = Staff_symbol::staff_space (st);
+ p = (space == 0) ? 0 : 2.0 * y / space;
return p;
}
else if (!st)
+ return me->relative_coordinate (me->get_parent (Y_AXIS), Y_AXIS) * 2;
+ return robust_scm2double (me->get_property ("staff-position"), p);
+}
+
+Interval
+Staff_symbol_referencer::extent_in_staff (Grob *me)
+{
+ Grob *st = get_staff_symbol (me);
+ Grob *c = st ? me->common_refpoint (st, Y_AXIS) : 0;
+
+ Interval retval;
+ if (st && c)
{
- return me->relative_coordinate (me->get_parent (Y_AXIS), Y_AXIS) * 2;
+ retval = me->extent (c, Y_AXIS)
+ - st->relative_coordinate (c, Y_AXIS);
}
- return robust_scm2double (me->get_property ("staff-position"), p);
+
+ return retval;
}
int
-Staff_symbol_referencer::get_rounded_position (Grob*me)
+Staff_symbol_referencer::get_rounded_position (Grob *me)
{
return int (rint (get_position (me)));
}
-LY_DEFINE (ly_grob_staff_position, "ly:grob-staff-position",
- 1, 0,0, (SCM sg),
- "Return the Y-position of @var{sg} relative to the staff.")
+int
+Staff_symbol_referencer::pure_get_rounded_position (Grob *me)
{
- Grob *g = unsmob_grob (sg);
-
- SCM_ASSERT_TYPE (g, sg, SCM_ARG1, __FUNCTION__, "grob");
- Real pos = Staff_symbol_referencer::get_position (g);
-
- if (fabs (rint (pos) -pos) < 1e-6) // ugh.
- return scm_int2num ((int) my_round (pos));
- else
- return scm_make_real (pos);
+ return int (rint (pure_get_position (me)));
}
-
-/* should use offset callback! */
-MAKE_SCHEME_CALLBACK (Staff_symbol_referencer,callback,2);
+MAKE_SCHEME_CALLBACK (Staff_symbol_referencer, callback, 1);
SCM
-Staff_symbol_referencer::callback (SCM element_smob, SCM)
+Staff_symbol_referencer::callback (SCM smob)
{
- Grob *me = unsmob_grob (element_smob);
+ Grob *me = unsmob_grob (smob);
SCM pos = me->get_property ("staff-position");
Real off = 0.0;
{
Real space = Staff_symbol_referencer::staff_space (me);
off = scm_to_double (pos) * space / 2.0;
- me->set_property ("staff-position", scm_int2num (0));
}
- return scm_make_real (off);
+ return scm_from_double (off);
}
/* This sets the position relative to the center of the staff symbol.
void
Staff_symbol_referencer::set_position (Grob *me, Real p)
+{
+ internal_set_position (me, p, false);
+}
+
+void
+Staff_symbol_referencer::pure_set_position (Grob *me, Real p)
+{
+ internal_set_position (me, p, true);
+}
+
+void
+Staff_symbol_referencer::internal_set_position (Grob *me, Real p, bool pure)
{
Grob *st = get_staff_symbol (me);
+ Real oldpos = 0.0;
if (st && me->common_refpoint (st, Y_AXIS))
{
- Real oldpos = get_position (me);
- me->set_property ("staff-position", scm_make_real (p - oldpos));
+ oldpos = pure ? pure_get_position (me) : get_position (me);
}
- else
- me->set_property ("staff-position", scm_make_real (p));
- me->add_offset_callback (Staff_symbol_referencer::callback_proc, Y_AXIS);
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ me->translate_axis ((p - oldpos) * ss * 0.5, Y_AXIS);
+}
+
+Interval
+Staff_symbol_referencer::staff_span (Grob *me)
+{
+ Interval result;
+ if (me)
+ if (Grob *symb = get_staff_symbol (me))
+ result = Staff_symbol::line_span (symb);
+ return result;
}
-/* Half of the height, in staff space, i.e. 2.0 for a normal staff. */
Real
Staff_symbol_referencer::staff_radius (Grob *me)
{
- return (line_count (me) - 1) / 2.0;
+ /*
+ line_span is measured in pitch steps, not in staff spaces
+ */
+ return staff_span (me).length () / 4.0;
}
int
compare_position (Grob *const &a, Grob *const &b)
{
- return sign (Staff_symbol_referencer::get_position ((Grob*)a)
- - Staff_symbol_referencer::get_position ((Grob*) b));
+ return sign (Staff_symbol_referencer::get_position ((Grob *)a)
+ - Staff_symbol_referencer::get_position ((Grob *) b));
+}
+
+bool
+position_less (Grob *const &a, Grob *const &b)
+{
+ return Staff_symbol_referencer::get_position (a)
+ < Staff_symbol_referencer::get_position (b);
+}
+
+bool
+pure_position_less (Grob *const &a, Grob *const &b)
+{
+ return Staff_symbol_referencer::pure_get_position (a)
+ < Staff_symbol_referencer::pure_get_position (b);
}
-ADD_INTERFACE (Staff_symbol_referencer,"staff-symbol-referencer-interface",
- "An object whose Y position is meant relative to a staff "
- "symbol. "
- "These usually have @code{Staff_symbol_referencer::callback} "
- "in their @code{Y-offset-callbacks}. "
- ,
- "staff-position");
+ADD_INTERFACE (Staff_symbol_referencer,
+ "An object whose Y@tie{}position is meant relative to a staff"
+ " symbol. These usually"
+ " have @code{Staff_symbol_referencer::callback} in their"
+ " @code{Y-offset-callbacks}.",
+ /* properties */
+ "staff-position "
+ );
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