-/*
- abbrev.cc -- implement Stem_tremolo
-
- source file of the GNU LilyPond music typesetter
-
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+/*
+ 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 "stem-tremolo.hh"
-#include "debug.hh"
+
+#include "spanner.hh"
#include "beam.hh"
-#include "paper-def.hh"
+#include "directional-element-interface.hh"
+#include "item.hh"
#include "lookup.hh"
-#include "stem.hh"
-#include "offset.hh"
-#include "dimension-cache.hh"
+#include "note-collision.hh"
+#include "note-column.hh"
+#include "output-def.hh"
#include "staff-symbol-referencer.hh"
-#include "directional-element-interface.hh"
+#include "stem.hh"
+#include "warn.hh"
-Stem_tremolo::Stem_tremolo ()
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_slope, 1)
+SCM
+Stem_tremolo::calc_slope (SCM smob)
{
- set_elt_property ("stem", SCM_EOL);
-}
+ Grob *me = Grob::unsmob (smob);
+ Grob *stem = Grob::unsmob (me->get_object ("stem"));
+ Spanner *beam = Stem::get_beam (stem);
+
+ if (beam)
+ {
+ Real dy = 0;
+ SCM s = beam->get_property ("quantized-positions");
+ if (is_number_pair (s))
+ dy = - scm_to_double (scm_car (s)) + scm_to_double (scm_cdr (s));
+
+ Grob *s2 = Beam::last_normal_stem (beam);
+ Grob *s1 = Beam::first_normal_stem (beam);
+ Grob *common = s1->common_refpoint (s2, X_AXIS);
+ Real dx = s2->relative_coordinate (common, X_AXIS)
+ - s1->relative_coordinate (common, X_AXIS);
+
+ return scm_from_double (dx ? dy / dx : 0);
+ }
+ else
+ /* down stems with flags should have more sloped trems (helps avoid
+ flag/stem collisions without making the stem very long) */
+ return scm_from_double ((Stem::duration_log (stem) >= 3 && get_grob_direction (me) == DOWN)
+ ? 0.40 : 0.25);
+}
-Stem *
-Stem_tremolo::stem_l ()const
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_width, 1)
+SCM
+Stem_tremolo::calc_width (SCM smob)
{
- SCM s = get_elt_property ("stem");
+ Grob *me = Grob::unsmob (smob);
+ Grob *stem = Grob::unsmob (me->get_object ("stem"));
+ Direction dir = get_grob_direction (me);
+ bool beam = Stem::get_beam (stem);
+ bool flag = Stem::duration_log (stem) >= 3 && !beam;
- return dynamic_cast<Stem*> ( unsmob_element (s));
+ /* beamed stems and up-stems with flags have shorter tremolos */
+ return scm_from_double (((dir == UP && flag) || beam) ? 1.0 : 1.5);
}
-Interval
-Stem_tremolo::dim_callback (Dimension_cache const *c)
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_style, 1)
+SCM
+Stem_tremolo::calc_style (SCM smob)
{
- 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);
+ Grob *me = Grob::unsmob (smob);
+ Grob *stem = Grob::unsmob (me->get_object ("stem"));
+ Direction dir = get_grob_direction (me);
+ bool beam = Stem::get_beam (stem);
+ bool flag = Stem::duration_log (stem) >= 3 && !beam;
+
+ return ly_symbol2scm (((dir == UP && flag) || beam) ? "rectangle" : "default");
}
+Real
+Stem_tremolo::get_beam_translation (Grob *me)
+{
+ Grob *stem = Grob::unsmob (me->get_object ("stem"));
+ Spanner *beam = Stem::get_beam (stem);
-Molecule
-Stem_tremolo::do_brew_molecule () const
+ return (beam && beam->is_live ())
+ ? Beam::get_beam_translation (beam)
+ : (Staff_symbol_referencer::staff_space (me)
+ * robust_scm2double (me->get_property ("length-fraction"), 1.0) * 0.81);
+}
+
+Stencil
+Stem_tremolo::raw_stencil (Grob *me, Real slope, Direction dir)
{
- Stem * st = stem_l ();
- int mult =0;
- if (Beam * b = st->beam_l ())
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ Real thick = robust_scm2double (me->get_property ("beam-thickness"), 1);
+ Real width = robust_scm2double (me->get_property ("beam-width"), 1);
+ Real blot = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
+ SCM style = me->get_property ("style");
+ if (!scm_is_symbol (style))
+ style = ly_symbol2scm ("default");
+
+ width *= ss;
+ thick *= ss;
+
+ Stencil a;
+ if (style == ly_symbol2scm ("rectangle"))
+ a = Lookup::rotated_box (slope, width, thick, blot);
+ else
+ a = Lookup::beam (slope, width, thick, blot);
+
+ a.align_to (X_AXIS, CENTER);
+ a.align_to (Y_AXIS, CENTER);
+
+ int tremolo_flags = robust_scm2int (me->get_property ("flag-count"), 0);
+ if (!tremolo_flags)
{
- mult = b->get_multiplicity ();
+ programming_error ("no tremolo flags");
+
+ me->suicide ();
+ return Stencil ();
}
-
- 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;
-
- if (st && st->beam_l ())
+
+ Real beam_translation = get_beam_translation (me);
+
+ Stencil mol;
+ for (int i = 0; i < tremolo_flags; i++)
{
- Real dy = 0;
- SCM s = st->beam_l ()->get_elt_property ("height");
- 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;
-
- // 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));
-
- int abbrev_flags = 1;
- {
- SCM a = get_elt_property ("abbrev-flags");
- if (gh_number_p (a))
- abbrev_flags = gh_scm2int (a);
- }
-
- Molecule mol;
- for (int i = 0; i < abbrev_flags; i++)
+ Stencil b (a);
+ b.translate_axis (beam_translation * i * dir * -1, Y_AXIS);
+ mol.add_stencil (b);
+ }
+ return mol;
+}
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, pure_height, 3);
+SCM
+Stem_tremolo::pure_height (SCM smob, SCM, SCM)
+{
+ Item *me = Item::unsmob (smob);
+
+ /*
+ Cannot use the real slope, since it looks at the Beam.
+ */
+ Stencil s1 (untranslated_stencil (me, 0.35));
+ Item *stem = Item::unsmob (me->get_object ("stem"));
+ if (!stem)
+ return ly_interval2scm (s1.extent (Y_AXIS));
+
+ Direction dir = get_grob_direction (me);
+
+ Spanner *beam = Stem::get_beam (stem);
+
+ if (!beam)
+ return ly_interval2scm (s1.extent (Y_AXIS));
+
+ Interval ph = stem->pure_height (stem, 0, INT_MAX);
+ Stem_info si = Stem::get_stem_info (stem);
+ ph[-dir] = si.shortest_y_;
+ int beam_count = Stem::beam_multiplicity (stem).length () + 1;
+ Real beam_translation = get_beam_translation (me);
+
+ ph = ph - dir * max (beam_count, 1) * beam_translation;
+ ph = ph - ph.center ();
+
+ return ly_interval2scm (ph);
+}
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, width, 1);
+SCM
+Stem_tremolo::width (SCM smob)
+{
+ Grob *me = Grob::unsmob (smob);
+
+ /*
+ Cannot use the real slope, since it looks at the Beam.
+ */
+ Stencil s1 (untranslated_stencil (me, 0.35));
+
+ return ly_interval2scm (s1.extent (X_AXIS));
+}
+
+Real
+Stem_tremolo::vertical_length (Grob *me)
+{
+ return untranslated_stencil (me, 0.35).extent (Y_AXIS).length ();
+}
+
+Stencil
+Stem_tremolo::untranslated_stencil (Grob *me, Real slope)
+{
+ Grob *stem = Grob::unsmob (me->get_object ("stem"));
+ if (!stem)
{
- Molecule b (a);
- b.translate_axis (interbeam_f * i, Y_AXIS);
- mol.add_molecule (b);
+ programming_error ("no stem for stem-tremolo");
+ return Stencil ();
}
- mol.translate_axis (-mol.extent ()[Y_AXIS].center (), Y_AXIS);
- if (st)
- {
- if (st->beam_l ())
+ Direction dir = get_grob_direction (me);
+
+ bool whole_note = Stem::duration_log (stem) <= 0;
+
+ /* for a whole note, we position relative to the notehead, so we want the
+ stencil aligned on the flag closest to the head */
+ Direction stencil_dir = whole_note ? -dir : dir;
+ return raw_stencil (me, slope, stencil_dir);
+}
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_y_offset, 1);
+SCM
+Stem_tremolo::calc_y_offset (SCM smob)
+{
+ Grob *me = Grob::unsmob (smob);
+ return scm_from_double (y_offset (me, false));
+}
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, pure_calc_y_offset, 3);
+SCM
+Stem_tremolo::pure_calc_y_offset (SCM smob,
+ SCM, /* start */
+ SCM /* end */)
+{
+ Grob *me = Grob::unsmob (smob);
+ return scm_from_double (y_offset (me, true));
+}
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_direction, 1);
+SCM
+Stem_tremolo::calc_direction (SCM smob)
+{
+ Item *me = Item::unsmob (smob);
+
+ Item *stem = Item::unsmob (me->get_object ("stem"));
+ if (!stem)
+ return scm_from_int (CENTER);
+
+ Direction stemdir = get_grob_direction (stem);
+
+ vector<int> nhp = Stem::note_head_positions (stem);
+ /*
+ * We re-decide stem-dir if there may be collisions with other
+ * note heads in the staff.
+ */
+ Grob *maybe_nc = stem->get_parent (X_AXIS)->get_parent (X_AXIS);
+ bool whole_note = Stem::duration_log (stem) <= 0;
+ if (whole_note && Note_collision_interface::has_interface (maybe_nc))
+ {
+ Drul_array<bool> avoid_me (false, false);
+ vector<int> all_nhps = Note_collision_interface::note_head_positions (maybe_nc);
+ if (all_nhps[0] < nhp[0])
+ avoid_me[DOWN] = true;
+ if (all_nhps.back () > nhp.back ())
+ avoid_me[UP] = true;
+ if (avoid_me[stemdir])
{
- 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));
- }
- 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;
-
- 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
- */
+ stemdir = -stemdir;
+ if (avoid_me[stemdir])
+ {
+ me->warning ("Whole-note tremolo may collide with simultaneous notes.");
+ stemdir = -stemdir;
+ }
+ }
}
-
- return mol;
+ return scm_from_int (stemdir);
}
+Real
+Stem_tremolo::y_offset (Grob *me, bool pure)
+{
+ Item *stem = Item::unsmob (me->get_object ("stem"));
+ if (!stem)
+ return 0.0;
+
+ Direction dir = get_grob_direction (me);
+
+ Spanner *beam = Stem::get_beam (stem);
+ Real beam_translation = get_beam_translation (me);
+
+ int beam_count = beam ? (Stem::beam_multiplicity (stem).length () + 1) : 0;
+
+ if (pure && beam)
+ {
+ Interval ph = stem->pure_height (stem, 0, INT_MAX);
+ Stem_info si = Stem::get_stem_info (stem);
+ ph[-dir] = si.shortest_y_;
+
+ return (ph - dir * max (beam_count, 1) * beam_translation)[dir] - dir * 0.5 * me->pure_height (me, 0, INT_MAX).length ();
+ }
+
+ Real end_y
+ = (pure
+ ? stem->pure_height (stem, 0, INT_MAX)[dir]
+ : stem->extent (stem, Y_AXIS)[dir])
+ - dir * max (beam_count, 1) * beam_translation
+ - Stem::beam_end_corrective (stem);
-void
-Stem_tremolo::set_stem (Stem *s)
+ if (!beam && Stem::duration_log (stem) >= 3)
+ {
+ end_y -= dir * (Stem::duration_log (stem) - 2) * beam_translation;
+ if (dir == UP)
+ end_y -= dir * beam_translation * 0.5;
+ }
+
+ bool whole_note = Stem::duration_log (stem) <= 0;
+ if (whole_note || isinf(end_y))
+ {
+ /* we shouldn't position relative to the end of the stem since the stem
+ is invisible */
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ vector<int> nhp = Stem::note_head_positions (stem);
+ Real note_head = (dir == UP ? nhp.back () : nhp[0]) * ss / 2;
+ end_y = note_head + dir * 1.5;
+ }
+
+ return end_y;
+}
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, print, 1);
+SCM
+Stem_tremolo::print (SCM grob)
{
- set_elt_property ("stem", s->self_scm_);
- add_dependency (s);
+ Grob *me = Grob::unsmob (grob);
+
+ Stencil s = untranslated_stencil (me, robust_scm2double (me->get_property ("slope"), 0.25));
+ return s.smobbed_copy ();
}
+ADD_INTERFACE (Stem_tremolo,
+ "A beam slashing a stem to indicate a tremolo. The property"
+ " @code{style} can be @code{default} or @code{rectangle}.",
+
+ /* properties */
+ "beam-thickness "
+ "beam-width "
+ "direction "
+ "flag-count "
+ "length-fraction "
+ "stem "
+ "style "
+ "slope "
+ );
projects / lilypond.git / blobdiff