-/*
- arpegggio.cc -- implement Arpeggio
+/*
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
- */
+ Copyright (C) 2000--2015 Jan Nieuwenhuizen <janneke@gnu.org>
+
+ 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 "molecule.hh"
-#include "paper-def.hh"
-#include "lookup.hh"
#include "arpeggio.hh"
-#include "score-element.hh"
-#include "stem.hh"
+
+#include "bezier.hh"
+#include "font-interface.hh"
+#include "grob.hh"
+#include "international.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"
+
+static Stencil
+get_squiggle (Grob *me)
+{
+ Font_metric *fm = Font_interface::get_default_font (me);
+ Stencil squiggle = fm->find_by_name ("scripts.arpeggio");
+
+ return squiggle;
+}
+
+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;
+}
-bool
-Arpeggio::has_interface (Score_element* me)
+MAKE_SCHEME_CALLBACK (Arpeggio, calc_cross_staff, 1);
+SCM
+Arpeggio::calc_cross_staff (SCM grob)
{
- return me && me->has_interface (ly_symbol2scm ("arpeggio-interface"));
+ Grob *me = unsmob<Grob> (grob);
+
+ extract_grob_set (me, "stems", stems);
+ Grob *vag = 0;
+
+ for (vsize i = 0; i < stems.size (); i++)
+ {
+ if (!i)
+ vag = Grob::get_vertical_axis_group (stems[i]);
+ else
+ {
+ if (vag != Grob::get_vertical_axis_group (stems[i]))
+ return SCM_BOOL_T;
+ }
+ }
+
+ return SCM_BOOL_F;
+}
+
+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_referencer::staff_space (me) / 2.0;
+ Real staff_y = ss ? ss->relative_coordinate (common, Y_AXIS) : 0.0;
+ heads.unite (iv + staff_y - my_y);
+ }
+
+ heads *= 1 / Staff_symbol_referencer::staff_space (me);
+
+ return ly_interval2scm (heads);
}
-MAKE_SCHEME_CALLBACK (Arpeggio, brew_molecule, 1);
-SCM
-Arpeggio::brew_molecule (SCM smob)
+MAKE_SCHEME_CALLBACK (Arpeggio, print, 1);
+SCM
+Arpeggio::print (SCM smob)
{
- Score_element *me = unsmob_element (smob);
-
- Interval iv;
- for (SCM s = me->get_elt_property ("stems"); gh_pair_p (s); s = gh_cdr (s))
+ 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)
{
- Score_element *stem = unsmob_element (gh_car (s));
- iv.unite (Stem::head_positions (stem));
+ if (to_boolean (me->get_property ("transparent")))
+ {
+ /*
+ This is part of a cross-staff/-voice span-arpeggio,
+ so we need to ensure `heads' is large enough to encompass
+ a single trill-element since the span-arpeggio depends on
+ its children to prevent collisions.
+ */
+ heads.unite (get_squiggle (me).extent (Y_AXIS));
+ }
+ else
+ {
+ me->warning (_ ("no heads for arpeggio found?"));
+ me->suicide ();
+ return SCM_EOL;
+ }
}
- Molecule mol;
- Molecule arpeggio = me->paper_l ()->lookup_l (0)->afm_find ("scripts-arpeggio");
- Real staff_space = Staff_symbol_referencer::staff_space (me);
- for (int i = (int)iv[MIN]/ 2; i < (int)(iv[MAX] - 1)/ 2; i++)
+ SCM ad = me->get_property ("arpeggio-direction");
+ Direction dir = CENTER;
+ if (is_direction (ad))
+ dir = to_dir (ad);
+
+ Stencil mol;
+ Stencil squiggle (get_squiggle (me));
+
+ /*
+ Compensate for rounding error which may occur when a chord
+ reaches the center line, resulting in an extra squiggle
+ being added to the arpeggio stencil. This value is appreciably
+ larger than the rounding error, which is in the region of 1e-16
+ for a global-staff-size of 20, but small enough that it does not
+ interfere with smaller staff sizes.
+ */
+ const Real epsilon = 1e-3;
+
+ Stencil arrow;
+ if (dir)
{
- Molecule a (arpeggio);
- a.translate_axis (i * staff_space, Y_AXIS);
- mol.add_molecule (a);
+ Font_metric *fm = Font_interface::get_default_font (me);
+ arrow = fm->find_by_name ("scripts.arpeggio.arrow." + ::to_string (dir));
+ heads[dir] -= dir * arrow.extent (Y_AXIS).length ();
}
- // mol.translate (Offset (-2 * staff_space, 0));
- return mol.create_scheme ();
+ while (mol.extent (Y_AXIS).length () + epsilon < heads.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 th
+ = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"))
+ * robust_scm2double (me->get_property ("thickness"), 1);
+ Real sp = 1.5 * Staff_symbol_referencer::staff_space (me);
+ Real dy = heads.length () + sp;
+ Real x = robust_scm2double (me->get_property ("protrusion"), 0.4);
+
+ Stencil mol (Lookup::bracket (Y_AXIS, Interval (0, dy), th, x, th));
+ 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);
+ SCM dash_definition = me->get_property ("dash-definition");
+ 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"))
+ * robust_scm2double (me->get_property ("line-thickness"), 1.0);
+ Real th
+ = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"))
+ * robust_scm2double (me->get_property ("thickness"), 1.0);
+ Real dy = heads.length ();
+
+ Real height_limit = 1.5;
+ Real ratio = .33;
+ Bezier curve = slur_shape (dy, height_limit, ratio);
+ curve.rotate (90.0);
+
+ Stencil mol (Lookup::slur (curve, th, lt, dash_definition));
+ 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);
+ return ly_interval2scm (get_squiggle (me).extent (X_AXIS));
+}
+
+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 Grob::stencil_height (smob);
+}
+
+ADD_INTERFACE (Arpeggio,
+ "Functions and settings for drawing an arpeggio symbol.",
+
+ /* properties */
+ "arpeggio-direction "
+ "dash-definition " // TODO: make apply to non-slur arpeggios
+ "line-thickness "
+ "positions "
+ "protrusion "
+ "script-priority " // TODO: make around-note-interface
+ "stems "
+ "thickness "
+ );
projects / lilypond.git / blobdiff