/*
- abbrev.cc -- implement Stem_tremolo
+ stem-tremolo.cc -- implement Stem_tremolo
source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "paper-def.hh"
#include "lookup.hh"
#include "stem.hh"
-#include "offset.hh"
-#include "dimension-cache.hh"
+#include "item.hh"
#include "staff-symbol-referencer.hh"
#include "directional-element-interface.hh"
-Stem_tremolo::Stem_tremolo ()
+/*
+ TODO:
+ lengthen stem if necessary
+ */
+
+void
+Stem_tremolo::set_interface (Grob *me)
{
- set_elt_property ("stem", SCM_EOL);
+ me->set_interface (ly_symbol2scm ("stem-tremolo"));
}
-
-Stem *
-Stem_tremolo::stem_l ()const
+bool
+Stem_tremolo::has_interface (Grob *me)
{
- SCM s = get_elt_property ("stem");
+ return me->has_interface (ly_symbol2scm ("stem-tremolo"));
+}
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo,dim_callback,2);
- return dynamic_cast<Stem*> ( unsmob_element (s));
+/*
+ todo: init with cons.
+ */
+SCM
+Stem_tremolo::dim_callback (SCM e, SCM)
+{
+ Grob * se = unsmob_grob (e);
+
+ Real space = Staff_symbol_referencer::staff_space (se);
+ return ly_interval2scm (Interval (-space, space));
}
-Interval
-Stem_tremolo::dim_callback (Dimension_cache const *c)
+/*
+ ugh ? --from Slur
+ */
+MAKE_SCHEME_CALLBACK (Stem_tremolo, height, 2);
+SCM
+Stem_tremolo::height (SCM smob, SCM ax)
{
- Stem_tremolo * s = dynamic_cast<Stem_tremolo*> (c->element_l ());
- Real space = Staff_symbol_referencer_interface (s->stem_l ())
- .staff_space ();
- return Interval (-space, space);
+ Axis a = (Axis)gh_scm2int (ax);
+ Grob * me = unsmob_grob (smob);
+ assert (a == Y_AXIS);
+
+ SCM mol = me->get_uncached_molecule ();
+ return ly_interval2scm (unsmob_molecule (mol)->extent (a));
}
-Molecule
-Stem_tremolo::do_brew_molecule () const
+MAKE_SCHEME_CALLBACK (Stem_tremolo,brew_molecule,1);
+SCM
+Stem_tremolo::brew_molecule (SCM smob)
{
- Stem * st = stem_l ();
- int mult =0;
- if (Beam * b = st->beam_l ())
- {
- mult = b->get_multiplicity ();
- }
-
- Real interbeam_f = paper_l ()->interbeam_f (mult);
- Real w = gh_scm2double (get_elt_property ("beam-width"));
- Real space = Staff_symbol_referencer_interface (st).staff_space ();
- Real half_staff_space = space / 2;
- Real beam_f = gh_scm2double (get_elt_property ("beam-thickness"));
-
- int beams_i = 0;
- Real dydx = 0.25;
+ Grob *me= unsmob_grob (smob);
+ Grob * stem = unsmob_grob (me->get_grob_property ("stem"));
+ Grob * beam = Stem::beam_l (stem);
- if (st && st->beam_l ())
+ Real dydx;
+ if (beam)
{
Real dy = 0;
- SCM s = st->beam_l ()->get_elt_property ("height");
+ SCM s = beam->get_grob_property ("dy");
if (gh_number_p (s))
dy = gh_scm2double (s);
- Real dx = st->beam_l ()->last_visible_stem ()->hpos_f ()
- - st->beam_l ()->first_visible_stem ()->hpos_f ();
- dydx = dy/dx;
+ Real dx = Beam::last_visible_stem (beam)->relative_coordinate (0, X_AXIS)
+ - Beam::first_visible_stem (beam)->relative_coordinate (0, X_AXIS);
+ dydx = dx ? dy/dx : 0;
+ }
+ else
+ // urg
+ dydx = 0.25;
+
+ Real ss = Staff_symbol_referencer::staff_space (stem);
+ Real thick = gh_scm2double (me->get_grob_property ("beam-thickness"));
+ Real width = gh_scm2double (me->get_grob_property ("beam-width"));
+ width *= ss;
+ thick *= ss;
- // ugh, rather calc from Stem_tremolo_req
- beams_i = st->beam_count(RIGHT) >? st->beam_count (LEFT);
- }
-
- Molecule a (lookup_l ()->beam (dydx, w, beam_f));
- a.translate (Offset (-w/2, w / 2 * dydx));
+ Molecule a (Lookup::beam (dydx, width, thick));
+ a.translate (Offset (-width/2, width / 2 * dydx));
- int abbrev_flags = 1;
- {
- SCM a = get_elt_property ("abbrev-flags");
- if (gh_number_p (a))
- abbrev_flags = gh_scm2int (a);
- }
+ int tremolo_flags;
+ SCM s = me->get_grob_property ("tremolo-flags");
+ if (gh_number_p (s))
+ tremolo_flags = gh_scm2int (s);
+ else
+ // huh?
+ tremolo_flags = 1;
+
+ int mult = beam ? Beam::get_multiplicity (beam) : 0;
+ SCM space_proc = me->get_grob_property ("beam-space-function");
+ SCM space = gh_call1 (space_proc, gh_int2scm (mult));
+ Real interbeam_f = gh_scm2double (space) * ss;
+
Molecule mol;
- for (int i = 0; i < abbrev_flags; i++)
+ for (int i = 0; i < tremolo_flags; i++)
{
Molecule b (a);
b.translate_axis (interbeam_f * i, Y_AXIS);
mol.add_molecule (b);
}
- mol.translate_axis (-mol.extent ()[Y_AXIS].center (), Y_AXIS);
-
- if (st)
- {
- if (st->beam_l ())
- {
- mol.translate (Offset(st->hpos_f () - hpos_f (),
- st->stem_end_position () * half_staff_space -
- directional_element (st->beam_l ()).get () * beams_i * interbeam_f));
+ if (tremolo_flags)
+ mol.translate_axis (-mol.extent (Y_AXIS).center (), Y_AXIS);
+ if (beam)
+ {
+ // ugh, rather calc from Stem_tremolo_req
+ int beams_i = Stem::beam_count (stem, RIGHT) >? Stem::beam_count (stem, LEFT);
+ mol.translate (Offset (stem->relative_coordinate (0, X_AXIS) - me->relative_coordinate (0, X_AXIS),
+ Stem::stem_end_position (stem) * ss / 2 -
+ Directional_element_interface::get (beam) * beams_i * interbeam_f));
+ }
+ else
+ {
+ /*
+ Beams should intersect one beamthickness below stem end
+ */
+ Real dy = Stem::stem_end_position (stem) * ss / 2;
+ dy -= mol.extent (Y_AXIS).length () / 2 * Stem::get_direction (stem);
+
+ /*
+ uhg. Should use relative coords and placement
+ */
+ Real whole_note_correction;
+ if (Stem::invisible_b (stem))
+ {
+ Grob *hed = Stem::support_head (stem);
+ whole_note_correction = -Stem::get_direction (stem)
+ *hed->extent (hed, X_AXIS).length () / 2;
}
else
- {
- /*
- Beams should intersect one beamthickness below staff end
- */
- Real dy = - mol.extent ()[Y_AXIS].length () / 2 * st->get_direction ();
-
- /*
- uhg. Should use relative coords and placement
- */
- Real whole_note_correction = (st && st->invisible_b( ))
- ? 0.0 // -st->get_direction () * st->note_delta_f ()/2
- : 0.0;
+ whole_note_correction = 0;
- dy += st->stem_end_position ();
- mol.translate (Offset(st->hpos_f () - hpos_f ()+
- whole_note_correction, dy));
- }
-
- /*
- there used to be half a page of code that was long commented out.
- Removed in 1.1.35
- */
+ mol.translate (Offset (stem->relative_coordinate (0, X_AXIS) - me->relative_coordinate (0, X_AXIS) +
+ whole_note_correction, dy));
}
- return mol;
+ return mol.smobbed_copy ();
}
void
-Stem_tremolo::set_stem (Stem *s)
+Stem_tremolo::set_stem (Grob*me,Grob *s)
{
- set_elt_property ("stem", s->self_scm_);
- add_dependency (s);
+ me->set_grob_property ("stem", s->self_scm ());
}