-/*
- stem-tremolo.cc -- implement Stem_tremolo
-
+/*
+ stem-tremolo.cc -- implement Stem_tremolo
+
source file of the GNU LilyPond music typesetter
-
- (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#include "stem-tremolo.hh"
#include "stem.hh"
#include "warn.hh"
-/* TODO: lengthen stem if necessary */
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_slope, 1)
+SCM
+Stem_tremolo::calc_slope (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ Grob *stem = unsmob_grob (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);
-MAKE_SCHEME_CALLBACK (Stem_tremolo, dim_callback, 2);
+ 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 (stem) == DOWN) ?
+ 0.40 : 0.25);
+}
-/* todo: init with cons. */
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_width, 1)
SCM
-Stem_tremolo::dim_callback (SCM e, SCM)
+Stem_tremolo::calc_width (SCM smob)
{
- Grob *se = unsmob_grob (e);
-
- Real space = Staff_symbol_referencer::staff_space (se);
- return ly_interval2scm (Interval (-space, space));
+ Grob *me = unsmob_grob (smob);
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ Direction stemdir = get_grob_direction (stem);
+ bool beam = Stem::get_beam (stem);
+ bool flag = Stem::duration_log (stem) >= 3 && !beam;
+
+ /* beamed stems and up-stems with flags have shorter tremolos */
+ return scm_from_double (((stemdir == UP && flag) || beam)? 1.0 : 1.5);
}
-/* ugh ? --from Slur */
-MAKE_SCHEME_CALLBACK (Stem_tremolo, height, 2);
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_style, 1)
SCM
-Stem_tremolo::height (SCM smob, SCM ax)
+Stem_tremolo::calc_style (SCM smob)
{
- Axis a = (Axis)scm_to_int (ax);
Grob *me = unsmob_grob (smob);
- assert (a == Y_AXIS);
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ Direction stemdir = get_grob_direction (stem);
+ bool beam = Stem::get_beam (stem);
+ bool flag = Stem::duration_log (stem) >= 3 && !beam;
- SCM mol = me->get_uncached_stencil ();
+ return ly_symbol2scm (((stemdir == UP && flag) || beam) ? "rectangle" : "default");
+}
- if (Stencil *m = unsmob_stencil (mol))
- return ly_interval2scm (m->extent (a));
- else
- return ly_interval2scm (Interval ());
+Real
+Stem_tremolo::get_beam_translation (Grob *me)
+{
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ Spanner *beam = Stem::get_beam (stem);
+
+ 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)
+Stem_tremolo::raw_stencil (Grob *me, Real slope, Direction stemdir)
{
- Grob *stem = unsmob_grob (me->get_property ("stem"));
- Spanner*beam = Stem::get_beam (stem);
- Real dydx;
- if (beam)
- {
- Real dy = 0;
- SCM s = beam->get_property ("positions");
- if (is_number_pair (s))
- dy = -scm_to_double (scm_car (s)) +scm_to_double (scm_cdr (s));
-
- 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 (me);
Real thick = robust_scm2double (me->get_property ("beam-thickness"), 1);
Real width = robust_scm2double (me->get_property ("beam-width"), 1);
- Real blot = me->get_layout ()->get_dimension (ly_symbol2scm ("blotdiameter"));
+ 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 (Lookup::beam (dydx, width, thick, blot));
- a.translate (Offset (-width * 0.5, width * 0.5 * dydx));
-
- int tremolo_flags = 0;
- SCM s = me->get_property ("flag-count");
- if (scm_is_number (s))
- tremolo_flags = scm_to_int (s);
+ 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)
{
- programming_error ("No tremolo flags?");
+ programming_error ("no tremolo flags");
me->suicide ();
return Stencil ();
}
- /* Who the fuck is 0.81 ? --hwn. */
- Real beam_translation = beam ? Beam::get_beam_translation (beam) : 0.81;
+ Real beam_translation = get_beam_translation (me);
- Stencil mol;
+ Stencil mol;
for (int i = 0; i < tremolo_flags; i++)
{
Stencil b (a);
- b.translate_axis (beam_translation * i, Y_AXIS);
+ b.translate_axis (beam_translation * i * stemdir * -1, Y_AXIS);
mol.add_stencil (b);
}
return mol;
}
-MAKE_SCHEME_CALLBACK (Stem_tremolo, print, 1);
+
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, height, 1);
SCM
-Stem_tremolo::print (SCM grob)
+Stem_tremolo::height (SCM smob)
{
- Grob *me = unsmob_grob (grob);
- Grob *stem = unsmob_grob (me->get_property ("stem"));
+ Grob *me = unsmob_grob (smob);
+
+ /*
+ Cannot use the real slope, since it looks at the Beam.
+ */
+ Stencil s1 (translated_stencil (me, 0.35));
+
+ return ly_interval2scm (s1.extent (Y_AXIS));
+}
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, width, 1);
+SCM
+Stem_tremolo::width (SCM smob)
+{
+ Grob *me = unsmob_grob (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 = unsmob_grob (me->get_object ("stem"));
if (!stem)
{
- programming_error ("No stem for stem-tremolo");
- return SCM_EOL;
+ programming_error ("no stem for stem-tremolo");
+ return Stencil ();
}
+
+ Direction stemdir = get_grob_direction (stem);
+ if (!stemdir)
+ stemdir = UP;
+
+ 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 ? -stemdir : stemdir;
+ return raw_stencil (me, slope, stencil_dir);
+}
+
- Spanner *beam = Stem::get_beam (stem);
- Direction stemdir = Stem::get_direction (stem);
+Stencil
+Stem_tremolo::translated_stencil (Grob *me, Real slope)
+{
+ Stencil mol = untranslated_stencil (me, slope);
+
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ if (!stem)
+ return Stencil ();
+
+ Direction stemdir = get_grob_direction (stem);
if (stemdir == 0)
stemdir = UP;
- Real beam_translation
- = (beam && beam->is_live ())
- ? Beam::get_beam_translation (beam)
- : 0.81;
-
- Stencil mol = raw_stencil (me);
- Interval mol_ext = mol.extent (Y_AXIS);
- Real ss = Staff_symbol_referencer::staff_space (me);
+ Spanner *beam = Stem::get_beam (stem);
+ Real beam_translation = get_beam_translation (me);
- // ugh, rather calc from Stem_tremolo_req
int beam_count = beam ? (Stem::beam_multiplicity (stem).length () + 1) : 0;
-
- Real beamthickness = 0.0;
- SCM sbt = (beam) ? beam->get_property ("thickness") : SCM_EOL ;
- if (scm_is_number (sbt))
- beamthickness = scm_to_double (sbt) * ss;
+ Real ss = Staff_symbol_referencer::staff_space (me);
Real end_y
= Stem::stem_end_position (stem) * ss / 2
- - stemdir * (beam_count * beamthickness
- + ((beam_count -1) >? 0) * beam_translation);
-
- /* FIXME: the 0.33 ss is to compensate for the size of the note head. */
- Real chord_start_y = Stem::chord_start_y (stem) + 0.33 * ss * stemdir;
-
- Real padding = beam_translation;
+ - stemdir * max (beam_count, 1) * beam_translation;
- /* if there is a flag, just above/below the notehead.
- if there is not enough space, center on remaining space,
- else one beamspace away from stem end. */
if (!beam && Stem::duration_log (stem) >= 3)
{
- mol.align_to (Y_AXIS, -stemdir);
- mol.translate_axis (chord_start_y + 0.5 * stemdir, Y_AXIS);
+ end_y -= stemdir * (Stem::duration_log (stem) - 2) * beam_translation;
+ if (stemdir == UP)
+ end_y -= stemdir * beam_translation * 0.5;
}
- else if (stemdir * (end_y - chord_start_y) - 2 * padding - mol_ext.length ()
- < 0.0)
- mol.translate_axis (0.5 * (end_y + chord_start_y) - mol_ext.center (),
- Y_AXIS);
- else
- mol.translate_axis (end_y - stemdir * beam_translation -mol_ext [stemdir],
- Y_AXIS);
- return mol.smobbed_copy ();
+ bool whole_note = Stem::duration_log (stem) <= 0;
+ if (whole_note)
+ {
+ /* we shouldn't position relative to the end of the stem since the stem
+ is invisible */
+ vector<int> nhp = Stem::note_head_positions (stem);
+ Real note_head = (stemdir == UP ? nhp.back () : nhp[0]) * ss / 2;
+ end_y = note_head + stemdir * 1.5;
+ }
+ mol.translate_axis (end_y, Y_AXIS);
+
+ return mol;
}
+MAKE_SCHEME_CALLBACK (Stem_tremolo, print, 1);
+SCM
+Stem_tremolo::print (SCM grob)
+{
+ Grob *me = unsmob_grob (grob);
+
+ Stencil s = translated_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}.",
-ADD_INTERFACE (Stem_tremolo, "stem-tremolo-interface",
- "A beam slashing a stem to indicate a tremolo.",
- "stem beam-width beam-thickness flag-count");
+ /* properties */
+ "beam-thickness "
+ "beam-width "
+ "flag-count "
+ "length-fraction "
+ "stem "
+ "style "
+ "slope "
+ );
projects / lilypond.git / blobdiff