/*
- stem.cc -- implement Stem
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 1996--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Jan Nieuwenhuizen <janneke@gnu.org>
+ Copyright (C) 1996--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
TODO: This is way too hairy
+
+ TODO: fix naming.
+
+ Stem-end, chord-start, etc. is all confusing naming.
+
+ 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 <math.h> // m_pi
+#include "stem.hh"
+#include "spanner.hh"
-#include "lookup.hh"
+#include <cmath> // rint
+using namespace std;
+
+#include "beam.hh"
#include "directional-element-interface.hh"
-#include "note-head.hh"
-#include "stem.hh"
-#include "debug.hh"
-#include "paper-def.hh"
-#include "rhythmic-head.hh"
+#include "dot-column.hh"
#include "font-interface.hh"
-#include "molecule.hh"
-#include "paper-column.hh"
+#include "international.hh"
+#include "lookup.hh"
#include "misc.hh"
-#include "beam.hh"
+#include "note-head.hh"
+#include "output-def.hh"
+#include "paper-column.hh"
+#include "pointer-group-interface.hh"
#include "rest.hh"
-#include "group-interface.hh"
-#include "staff-symbol-referencer.hh"
-#include "spanner.hh"
+#include "rhythmic-head.hh"
#include "side-position-interface.hh"
+#include "staff-symbol-referencer.hh"
+#include "stem-tremolo.hh"
+#include "warn.hh"
void
-Stem::set_beaming (Grob*me ,int i, Direction d)
+Stem::set_beaming (Grob *me, int beam_count, Direction d)
{
- SCM pair = me->get_grob_property ("beaming");
-
- if (!gh_pair_p (pair))
+ SCM pair = me->get_property ("beaming");
+
+ if (!scm_is_pair (pair))
{
- pair = gh_cons (gh_int2scm (0),gh_int2scm (0));
- me-> set_grob_property ("beaming", pair);
+ pair = scm_cons (SCM_EOL, SCM_EOL);
+ me->set_property ("beaming", pair);
}
- index_set_cell (pair, d, gh_int2scm (i));
+
+ SCM lst = index_get_cell (pair, d);
+ if (beam_count)
+ for (int i = 0; i < beam_count; i++)
+ lst = scm_cons (scm_from_int (i), lst);
+ else
+ lst = SCM_BOOL_F;
+
+ index_set_cell (pair, d, lst);
}
int
-Stem::beam_count (Grob*me,Direction d)
+Stem::get_beaming (Grob *me, Direction d)
{
- SCM p=me->get_grob_property ("beaming");
- if (gh_pair_p (p))
- return gh_scm2int (index_cell (p,d));
- else
+ SCM pair = me->get_property ("beaming");
+ if (!scm_is_pair (pair))
return 0;
+
+ SCM lst = index_get_cell (pair, d);
+
+ int len = scm_ilength (lst);
+ return max (len, 0);
}
Interval
-Stem::head_positions (Grob*me)
+Stem::head_positions (Grob *me)
{
- if (!heads_i (me))
+ if (head_count (me))
{
- Interval iv;
- return iv;
+ Drul_array<Grob *> e (extremal_heads (me));
+ return Interval (Staff_symbol_referencer::get_position (e[DOWN]),
+ Staff_symbol_referencer::get_position (e[UP]));
}
-
- Drul_array<Grob*> e (extremal_heads (me));
-
- return Interval (Staff_symbol_referencer::position_f (e[DOWN]),
- Staff_symbol_referencer::position_f (e[UP]));
+ return Interval ();
}
-
Real
-Stem::chord_start_f (Grob*me)
+Stem::chord_start_y (Grob *me)
{
- return head_positions (me)[get_direction (me)]
- * Staff_symbol_referencer::staff_space (me)/2.0;
+ Interval hp = head_positions (me);
+ if (!hp.is_empty ())
+ return hp[get_grob_direction (me)] * Staff_symbol_referencer::staff_space (me)
+ * 0.5;
+ return 0;
}
-Real
-Stem::stem_end_position (Grob*me)
-{
- SCM p =me->get_grob_property ("stem-end-position");
- Real pos;
- if (!gh_number_p (p))
- {
- pos = get_default_stem_end_position (me);
- me->set_grob_property ("stem-end-position", gh_double2scm (pos));
- }
- else
- pos = gh_scm2double (p);
-
- return pos;
-}
-Direction
-Stem::get_direction (Grob*me)
+void
+Stem::set_stemend (Grob *me, Real se)
{
- Direction d = Directional_element_interface::get (me);
+ // todo: margins
+ Direction d = get_grob_direction (me);
- if (!d)
- {
- d = get_default_dir (me);
- // urg, AAARGH!
- Directional_element_interface::set (me, d);
- }
- return d ;
-}
+ if (d && d * head_positions (me)[get_grob_direction (me)] >= se * d)
+ me->warning (_ ("weird stem size, check for narrow beams"));
+ me->set_property ("stem-end-position", scm_from_double (se));
+}
-void
-Stem::set_stemend (Grob*me, Real se)
+/* Note head that determines hshift for upstems
+ WARNING: triggers direction */
+Grob *
+Stem::support_head (Grob *me)
{
- // todo: margins
- Direction d= get_direction (me);
-
- if (d && d * head_positions (me)[get_direction (me)] >= se*d)
- warning (_ ("Weird stem size; check for narrow beams"));
+ extract_grob_set (me, "note-heads", heads);
+ if (heads.size () == 1)
+ return heads[0];
- me->set_grob_property ("stem-end-position", gh_double2scm (se));
+ return first_head (me);
}
int
-Stem::type_i (Grob*me)
+Stem::head_count (Grob *me)
{
- return first_head (me) ? Rhythmic_head::balltype_i (first_head (me)) : 2;
+ return Pointer_group_interface::count (me, ly_symbol2scm ("note-heads"));
}
-/*
- Note head that determines hshift for upstems
- */
-Grob*
-Stem::support_head (Grob*me)
-{
- SCM h = me->get_grob_property ("support-head");
- Grob * nh = unsmob_grob (h);
- if (nh)
- return nh;
- else if (heads_i (me) == 1)
- {
- /*
- UGH.
- */
-
- return unsmob_grob (ly_car (me->get_grob_property ("heads")));
- }
- else
- return first_head (me);
-}
-
-
-int
-Stem::heads_i (Grob*me)
+/* The note head which forms one end of the stem.
+ WARNING: triggers direction */
+Grob *
+Stem::first_head (Grob *me)
{
- return Pointer_group_interface::count (me, "heads");
+ Direction d = get_grob_direction (me);
+ if (d)
+ return extremal_heads (me)[-d];
+ return 0;
}
-/*
- The note head which forms one end of the stem.
- */
-Grob*
-Stem::first_head (Grob*me)
+/* The note head opposite to the first head. */
+Grob *
+Stem::last_head (Grob *me)
{
- return extremal_heads (me)[-get_direction (me)];
+ Direction d = get_grob_direction (me);
+ if (d)
+ return extremal_heads (me)[d];
+ return 0;
}
/*
- START is part where stem reaches `last' head.
- */
-Drul_array<Grob*>
-Stem::extremal_heads (Grob*me)
+ START is part where stem reaches `last' head.
+
+ This function returns a drul with (bottom-head, top-head).
+*/
+Drul_array<Grob *>
+Stem::extremal_heads (Grob *me)
{
- const int inf = 1000000;
+ const int inf = INT_MAX;
Drul_array<int> extpos;
extpos[DOWN] = inf;
- extpos[UP] = -inf;
-
- Drul_array<Grob *> exthead;
- exthead[LEFT] = exthead[RIGHT] =0;
-
- for (SCM s = me->get_grob_property ("heads"); gh_pair_p (s); s = ly_cdr (s))
- {
- Grob * n = unsmob_grob (ly_car (s));
+ extpos[UP] = -inf;
-
- int p = int (Staff_symbol_referencer::position_f (n));
+ Drul_array<Grob *> exthead (0, 0);
+ extract_grob_set (me, "note-heads", heads);
+
+ for (vsize i = heads.size (); i--;)
+ {
+ Grob *n = heads[i];
+ int p = Staff_symbol_referencer::get_rounded_position (n);
Direction d = LEFT;
- do {
- if (d* p > d* extpos[d])
+ do
{
- exthead[d] = n;
- extpos[d] = p;
+ if (d * p > d * extpos[d])
+ {
+ exthead[d] = n;
+ extpos[d] = p;
+ }
}
- } while (flip (&d) != DOWN);
+ while (flip (&d) != DOWN);
}
-
return exthead;
}
-static int
-icmp (int const &a, int const &b)
-{
- return a-b;
-}
-
-Array<int>
+/* The positions, in ascending order. */
+vector<int>
Stem::note_head_positions (Grob *me)
{
- Array<int> ps ;
- for (SCM s = me->get_grob_property ("heads"); gh_pair_p (s); s = ly_cdr (s))
+ vector<int> ps;
+ extract_grob_set (me, "note-heads", heads);
+
+ for (vsize i = heads.size (); i--;)
{
- Grob * n = unsmob_grob (ly_car (s));
- int p = int (Staff_symbol_referencer::position_f (n));
+ Grob *n = heads[i];
+ int p = Staff_symbol_referencer::get_rounded_position (n);
- ps.push (p);
+ ps.push_back (p);
}
- ps.sort (icmp);
- return ps;
+ vector_sort (ps, less<int> ());
+ return ps;
}
-
void
-Stem::add_head (Grob*me, Grob *n)
+Stem::add_head (Grob *me, Grob *n)
{
- n->set_grob_property ("stem", me->self_scm ());
- n->add_dependency (me);
+ n->set_object ("stem", me->self_scm ());
if (Note_head::has_interface (n))
- {
- Pointer_group_interface::add_element (me, ly_symbol2scm ("heads"), n);
- }
- else
- {
- n->set_grob_property ("rest", n->self_scm ());
- }
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-heads"), n);
+ else if (Rest::has_interface (n))
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("rests"), n);
}
bool
-Stem::invisible_b (Grob*me)
+Stem::is_invisible (Grob *me)
{
- return ! (heads_i (me) && Rhythmic_head::balltype_i (support_head (me)) >= 1);
+ return !is_normal_stem (me)
+ && (robust_scm2double (me->get_property ("stemlet-length"),
+ 0.0) == 0.0);
}
-int
-Stem::get_center_distance (Grob*me, Direction d)
+
+bool
+Stem::is_normal_stem (Grob *me)
{
- int staff_center = 0;
- int distance = (int) (d* (head_positions (me)[d] - staff_center));
- return distance >? 0;
+ return head_count (me) && scm_to_int (me->get_property ("duration-log")) >= 1;
}
-Direction
-Stem::get_default_dir (Grob*me)
+
+MAKE_SCHEME_CALLBACK (Stem, pure_height, 3)
+SCM
+Stem::pure_height (SCM smob,
+ SCM /* start */,
+ SCM /* end */)
{
- int du = get_center_distance (me,UP);
- int dd = get_center_distance (me,DOWN);
+ Grob *me = unsmob_grob (smob);
+ Interval iv;
- if (sign (dd - du))
- return Direction (sign (dd -du));
+ if (!is_normal_stem (me))
+ return ly_interval2scm (iv);
- return to_dir (me->get_grob_property ("neutral-direction"));
-}
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ Real rad = Staff_symbol_referencer::staff_radius (me);
-Real
-Stem::get_default_stem_end_position (Grob*me)
-{
- bool grace_b = to_boolean (me->get_grob_property ("grace"));
- SCM s;
- Array<Real> a;
-
- Real length_f = 0.;
- SCM scm_len = me->get_grob_property ("length");
- if (gh_number_p (scm_len))
+ if (!to_boolean (me->get_property ("cross-staff")))
{
- length_f = gh_scm2double (scm_len);
- }
- else
- {
- s = me->get_grob_property ("lengths");
- for (SCM q = s; q != SCM_EOL; q = ly_cdr (q))
- a.push (gh_scm2double (ly_car (q)));
-
- // stem uses half-spaces
- length_f = a[ ((flag_i (me) - 2) >? 0) <? (a.size () - 1)] * 2;
- }
+ Real len = scm_to_double (calc_length (smob)) * ss / 2;
+ Direction dir = get_grob_direction (me);
+ Interval hp = head_positions (me);
+ if (dir == UP)
+ iv = Interval (0, len);
+ else
+ iv = Interval (-len, 0);
- a.clear ();
- s = me->get_grob_property ("stem-shorten");
- for (SCM q = s; gh_pair_p (q); q = ly_cdr (q))
- a.push (gh_scm2double (ly_car (q)));
+ if (!hp.is_empty ())
+ {
+ iv.translate (hp[dir] * ss / 2);
+ iv.add_point (hp[-dir] * ss / 2);
+ }
+
+ /* extend the stem (away from the head) to cover the staff */
+ if (dir == UP)
+ iv[UP] = max (iv[UP], rad * ss);
+ else
+ iv[DOWN] = min (iv[DOWN], -rad * ss);
+ }
+ else
+ iv = Interval (-rad * ss, rad * ss);
+ return ly_interval2scm (iv);
+}
- // stem uses half-spaces
+MAKE_SCHEME_CALLBACK (Stem, calc_stem_end_position, 1)
+SCM
+Stem::calc_stem_end_position (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
- // fixme: use scm_list_n_ref () iso. array[]
- Real shorten_f = a[ ((flag_i (me) - 2) >? 0) <? (a.size () - 1)] * 2;
+ if (!head_count (me))
+ return scm_from_double (0.0);
- /* URGURGURG
- 'set-default-stemlen' sets direction too
- */
- Direction dir = get_direction (me);
- if (!dir)
+ if (Grob *beam = get_beam (me))
{
- dir = get_default_dir (me);
- Directional_element_interface::set (me, dir);
+ (void) beam->get_property ("quantized-positions");
+ return me->get_property ("stem-end-position");
}
- /*
- stems in unnatural (forced) direction should be shortened,
- according to [Roush & Gourlay]
- */
- if (( (int)chord_start_f (me))
- && (get_direction (me) != get_default_dir (me)))
- length_f -= shorten_f;
+ vector<Real> a;
+
+ /* WARNING: IN HALF SPACES */
+ Real length = robust_scm2double (me->get_property ("length"), 7);
- Interval hp = head_positions (me);
- Real st = hp[dir] + dir * length_f;
+ Direction dir = get_grob_direction (me);
+ Interval hp = head_positions (me);
+ Real stem_end = dir ? hp[dir] + dir * length : 0;
+ /* TODO: change name to extend-stems to staff/center/'() */
+ bool no_extend = to_boolean (me->get_property ("no-stem-extend"));
+ if (!no_extend && dir * stem_end < 0)
+ stem_end = 0.0;
+ return scm_from_double (stem_end);
+}
+
+/* Length is in half-spaces (or: positions) here. */
+MAKE_SCHEME_CALLBACK (Stem, calc_length, 1)
+SCM
+Stem::calc_length (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ SCM details = me->get_property ("details");
+ int durlog = duration_log (me);
- /*
- Make a little room if we have a flag and there is a dot.
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ Real length = 7;
+ SCM s = ly_assoc_get (ly_symbol2scm ("lengths"), details, SCM_EOL);
+ if (scm_is_pair (s))
+ length = 2 * scm_to_double (robust_list_ref (durlog - 2, s));
- TODO:
+ Direction dir = get_grob_direction (me);
- maybe we should consider moving the dot to the right?
- */
- if (!beam_l (me)
- && flag_i (me))
+ /* Stems in unnatural (forced) direction should be shortened,
+ according to [Roush & Gourlay] */
+ Interval hp = head_positions (me);
+ if (dir && dir * hp[dir] >= 0)
{
- Grob * closest_to_flag = extremal_heads (me)[dir];
- Grob * dots = closest_to_flag
- ? Rhythmic_head::dots_l (closest_to_flag ) : 0;
+ SCM sshorten = ly_assoc_get (ly_symbol2scm ("stem-shorten"), details, SCM_EOL);
+ SCM scm_shorten = scm_is_pair (sshorten)
+ ? robust_list_ref (max (duration_log (me) - 2, 0), sshorten) : SCM_EOL;
+ Real shorten = 2* robust_scm2double (scm_shorten, 0);
- if (dots)
- {
- Real dp = Staff_symbol_referencer::position_f (dots);
- Real flagy = flag (me).extent (Y_AXIS)[-dir] * 2; // should divide by staffspace
-
- /*
- Very gory: add myself to the X-support of the parent,
- which should be a dot-column.
- */
- if (dir * (st + flagy - dp) < 0.5)
- Side_position_interface::add_support (dots->get_parent (X_AXIS), me);
-
- /*
- previous approach was to lengthen the stem. This is not
- good typesetting practice. */
- }
- }
+ /* On boundary: shorten only half */
+ if (abs (head_positions (me)[dir]) <= 1)
+ shorten *= 0.5;
+ length -= shorten;
+ }
- bool no_extend_b = to_boolean (me->get_grob_property ("no-stem-extend"));
- if (!grace_b && !no_extend_b && dir * st < 0) // junkme?
- st = 0.0;
+ length *= robust_scm2double (me->get_property ("length-fraction"), 1.0);
- return st;
+ /* Tremolo stuff. */
+ Grob *t_flag = unsmob_grob (me->get_object ("tremolo-flag"));
+ if (t_flag && !unsmob_grob (me->get_object ("beam")))
+ {
+ /* Crude hack: add extra space if tremolo flag is there.
+
+ We can't do this for the beam, since we get into a loop
+ (Stem_tremolo::raw_stencil () looks at the beam.) --hwn */
+
+ Real minlen = 1.0
+ + 2 * Stem_tremolo::vertical_length (t_flag) / ss;
+
+ /* We don't want to add the whole extent of the flag because the trem
+ and the flag can overlap partly. beam_translation gives a good
+ approximation */
+ if (durlog >= 3)
+ {
+ Real beam_trans = Stem_tremolo::get_beam_translation (t_flag);
+ /* the obvious choice is (durlog - 2) here, but we need a bit more space. */
+ minlen += 2 * (durlog - 1.5) * beam_trans;
+
+ /* up-stems need even a little more space to avoid collisions. This
+ needs to be in sync with the tremolo positioning code in
+ Stem_tremolo::print */
+ if (dir == UP)
+ minlen += beam_trans;
+ }
+ length = max (length, minlen + 1.0);
+ }
+
+ return scm_from_double (length);
}
-
-
-
-/*
- Number of hooks on the flag, ie. the log of the duration.
- */
+/* The log of the duration (Number of hooks on the flag minus two) */
int
-Stem::flag_i (Grob*me)
+Stem::duration_log (Grob *me)
{
- SCM s = me->get_grob_property ("duration-log");
- return (gh_number_p (s)) ? gh_scm2int (s) : 2;
+ SCM s = me->get_property ("duration-log");
+ return (scm_is_number (s)) ? scm_to_int (s) : 2;
}
-void
-Stem::position_noteheads (Grob*me)
+MAKE_SCHEME_CALLBACK (Stem, calc_positioning_done, 1);
+SCM
+Stem::calc_positioning_done (SCM smob)
{
- if (!heads_i (me))
- return;
-
- Link_array<Grob> heads =
- Pointer_group_interface__extract_elements (me, (Grob*)0, "heads");
+ Grob *me = unsmob_grob (smob);
+ if (!head_count (me))
+ return SCM_BOOL_T;
- heads.sort (compare_position);
- Direction dir =get_direction (me);
+ me->set_property ("positioning-done", SCM_BOOL_T);
+ extract_grob_set (me, "note-heads", ro_heads);
+ vector<Grob*> heads (ro_heads);
+ vector_sort (heads, position_less);
+ Direction dir = get_grob_direction (me);
+
if (dir < 0)
- heads.reverse ();
+ reverse (heads);
+ Real thick = thickness (me);
Grob *hed = support_head (me);
- Real w = Note_head::head_extent (hed,X_AXIS)[dir];
- for (int i=0; i < heads.size (); i++)
+ if (!dir)
{
- heads[i]->translate_axis (w - Note_head::head_extent (heads[i],X_AXIS)[dir],
- X_AXIS);
+ programming_error ("Stem dir must be up or down.");
+ dir = UP;
+ set_grob_direction (me, dir);
}
-
- bool parity= true; // todo: make me settable.
- int lastpos = int (Staff_symbol_referencer::position_f (heads[0]));
- for (int i=1; i < heads.size (); i ++)
+
+ bool is_harmonic_centered = false;
+ for (vsize i = 0; i < heads.size (); i++)
+ is_harmonic_centered = is_harmonic_centered
+ || heads[i]->get_property ("style") == ly_symbol2scm ("harmonic");
+ is_harmonic_centered = is_harmonic_centered && is_invisible (me);
+
+ Real w = hed->extent (hed, X_AXIS)[dir];
+ for (vsize i = 0; i < heads.size (); i++)
+ {
+ Real amount = w - heads[i]->extent (heads[i], X_AXIS)[dir];
+
+ if (is_harmonic_centered)
+ amount =
+ hed->extent (hed, X_AXIS).linear_combination (CENTER)
+ - heads[i]->extent (heads[i], X_AXIS).linear_combination (CENTER);
+
+ heads[i]->translate_axis (amount, X_AXIS);
+ }
+ bool parity = true;
+ Real lastpos = Real (Staff_symbol_referencer::get_position (heads[0]));
+ for (vsize i = 1; i < heads.size (); i++)
{
- Real p = Staff_symbol_referencer::position_f (heads[i]);
- int dy =abs (lastpos- (int)p);
+ Real p = Staff_symbol_referencer::get_position (heads[i]);
+ Real dy = fabs (lastpos- p);
- if (dy <= 1)
+ /*
+ dy should always be 0.5, 0.0, 1.0, but provide safety margin
+ for rounding errors.
+ */
+ if (dy < 1.1)
{
if (parity)
{
- Real l = heads[i]->extent (heads[i], X_AXIS).length ();
- heads[i]->translate_axis (l * get_direction (me), X_AXIS);
+ Real ell = heads[i]->extent (heads[i], X_AXIS).length ();
+
+ Direction d = get_grob_direction (me);
+ /*
+ Reversed head should be shifted ell-thickness, but this
+ looks too crowded, so we only shift ell-0.5*thickness.
+
+ This leads to assymetry: Normal heads overlap the
+ stem 100% whereas reversed heads only overlaps the
+ stem 50%
+ */
+
+ Real reverse_overlap = 0.5;
+ heads[i]->translate_axis ((ell - thick * reverse_overlap) * d,
+ X_AXIS);
+
+ if (is_invisible (me))
+ heads[i]->translate_axis (-thick * (2 - reverse_overlap) * d,
+ X_AXIS);
+
+ /* TODO:
+
+ For some cases we should kern some more: when the
+ distance between the next or prev note is too large, we'd
+ get large white gaps, eg.
+
+ |
+ X|
+ |X <- kern this.
+ |
+ X
+
+ */
}
parity = !parity;
}
else
parity = true;
-
+
lastpos = int (p);
}
+
+ return SCM_BOOL_T;
}
-MAKE_SCHEME_CALLBACK (Stem,before_line_breaking,1);
+MAKE_SCHEME_CALLBACK (Stem, calc_direction, 1);
SCM
-Stem::before_line_breaking (SCM smob)
+Stem::calc_direction (SCM smob)
{
- Grob*me = unsmob_grob (smob);
- stem_end_position (me); // ugh. Trigger direction calc.
- position_noteheads (me);
-
- if (invisible_b (me))
+ Grob *me = unsmob_grob (smob);
+ Direction dir = CENTER;
+ if (Grob *beam = unsmob_grob (me->get_object ("beam")))
{
- me->remove_grob_property ("molecule-callback");
- // suicide ();
+ SCM ignore_me = beam->get_property ("direction");
+ (void) ignore_me;
+ dir = get_grob_direction (me);
+ }
+ else
+ {
+ SCM dd = me->get_property ("default-direction");
+ dir = to_dir (dd);
+ if (!dir)
+ return me->get_property ("neutral-direction");
}
- set_spacing_hints (me);
- return SCM_UNSPECIFIED;
+ return scm_from_int (dir);
}
-
-/*
- ugh.
- When in a beam with tuplet brackets, brew_mol is called early,
- caching a wrong value.
- */
-MAKE_SCHEME_CALLBACK (Stem, height, 2);
+MAKE_SCHEME_CALLBACK (Stem, calc_default_direction, 1);
SCM
-Stem::height (SCM smob, SCM ax)
+Stem::calc_default_direction (SCM smob)
{
- Axis a = (Axis)gh_scm2int (ax);
- Grob * me = unsmob_grob (smob);
- assert (a == Y_AXIS);
+ Grob *me = unsmob_grob (smob);
- SCM mol = me->get_uncached_molecule ();
- Interval iv;
- if (mol != SCM_EOL)
- iv = unsmob_molecule (mol)->extent (a);
- return ly_interval2scm (iv);
+ Direction dir = CENTER;
+ int staff_center = 0;
+ Interval hp = head_positions (me);
+ if (!hp.is_empty ())
+ {
+ int udistance = (int) (UP * hp[UP] - staff_center);
+ int ddistance = (int) (DOWN * hp[DOWN] - staff_center);
+
+ dir = Direction (sign (ddistance - udistance));
+ }
+
+ return scm_from_int (dir);
}
-/**
- set stem directions for hinting the optical spacing correction.
-
- Modifies DIR_LIST property of the Stem's Paper_column
-
- TODO: more advanced: supply height of noteheads as well, for more advanced spacing possibilities
- */
-void
-Stem::set_spacing_hints (Grob*me)
+MAKE_SCHEME_CALLBACK (Stem, height, 1);
+SCM
+Stem::height (SCM smob)
{
- if (!invisible_b (me))
+ Grob *me = unsmob_grob (smob);
+ if (!is_normal_stem (me))
+ return ly_interval2scm (Interval ());
+
+ Direction dir = get_grob_direction (me);
+
+ Grob *beam = get_beam (me);
+ if (beam)
{
- SCM scmdir = gh_int2scm (get_direction (me));
+ /* trigger set-stem-lengths. */
+ beam->get_property ("quantized-positions");
+ }
- Item* item = dynamic_cast<Item*> (me);
- Item * col = item->column_l ();
- SCM dirlist =col->get_grob_property ("dir-list");
- if (scm_c_memq (scmdir, dirlist) == SCM_BOOL_F)
+ /*
+ Can't get_stencil (), since that would cache stencils too early.
+ This causes problems with beams.
+ */
+ Stencil *stencil = unsmob_stencil (print (smob));
+ Interval iv = stencil ? stencil->extent (Y_AXIS) : Interval ();
+ if (beam)
+ {
+ if (dir == CENTER)
{
- dirlist = gh_cons (scmdir, dirlist);
- col->set_grob_property ("dir-list", dirlist);
+ programming_error ("no stem direction");
+ dir = UP;
}
+ iv[dir] += dir * Beam::get_beam_thickness (beam) * 0.5;
}
+
+ return ly_interval2scm (iv);
}
-Molecule
-Stem::flag (Grob*me)
+Real
+Stem::stem_end_position (Grob *me)
{
- /* TODO: rename flag-style into something more appropriate,
- e.g. "stroke-style", maybe with values "" (i.e. no stroke),
- "single" and "double". Needs more discussion.
- */
- String style, fstyle, staffline_offs;
- SCM fst = me->get_grob_property ("flag-style");
- if (gh_string_p (fst))
- {
- fstyle = ly_scm2string (fst);
- }
+ return robust_scm2double (me->get_property ("stem-end-position"), 0);
+}
- SCM st = me->get_grob_property ("style");
- if (gh_symbol_p (st))
- {
- style = (ly_scm2string (scm_symbol_to_string (st)));
- }
- else
- {
- style = "";
- }
- if (String::compare_i (style, "mensural") == 0)
+MAKE_SCHEME_CALLBACK (Stem, calc_flag, 1);
+SCM
+Stem::calc_flag (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+
+ int log = duration_log (me);
+ /*
+ TODO: maybe property stroke-style should take different values,
+ e.g. "" (i.e. no stroke), "single" and "double" (currently, it's
+ '() or "grace"). */
+ string flag_style;
+
+ SCM flag_style_scm = me->get_property ("flag-style");
+ if (scm_is_symbol (flag_style_scm))
+ flag_style = ly_symbol2string (flag_style_scm);
+
+ if (flag_style == "no-flag")
+ return Stencil ().smobbed_copy ();
+
+ bool adjust = true;
+
+ string staffline_offs;
+ if (flag_style == "mensural")
/* Mensural notation: For notes on staff lines, use different
flags than for notes between staff lines. The idea is that
flags are always vertically aligned with the staff lines,
touches a staff line.
*/
{
- /* Urrgh! We have to detect wether this stem ends on a staff
- line or between two staff lines. But we can not call
- stem_end_position(me) or get_default_stem_end_position(me),
- since this encounters the flag and hence results in an
- infinite recursion. However, in pure mensural notation,
- there are no multiple note heads attached to a single stem,
- neither is there usually need for using the stem_shorten
- property (except for 32th and 64th notes, but that is not a
- problem since the stem length in this case is augmented by
- an integral multiple of staff_space). Hence, it should be
- sufficient to just take the first note head, assume it's
- the only one, look if it's on a staff line, and select the
- flag's shape accordingly. In the worst case, the shape
- looks slightly misplaced, but that will usually be the
- programmer's fault (e.g. when trying to attach multiple
- note heads to a single stem in mensural notation).
-
- */
- Grob *first = first_head(me);
- int sz = Staff_symbol_referencer::line_count (me)-1;
- int p = (int)rint (Staff_symbol_referencer::position_f (first));
- staffline_offs = (((p ^ sz) & 0x1) == 0) ? "1" : "0";
- }
+ if (adjust)
+ {
+ int p = (int) (rint (stem_end_position (me)));
+ staffline_offs
+ = Staff_symbol_referencer::on_line (me, p) ? "0" : "1";
+ }
+ else
+ staffline_offs = "2";
+ }
else
+ staffline_offs = "";
+
+ char dir = (get_grob_direction (me) == UP) ? 'u' : 'd';
+ string font_char = flag_style
+ + to_string (dir) + staffline_offs + to_string (log);
+ Font_metric *fm = Font_interface::get_default_font (me);
+ Stencil flag = fm->find_by_name ("flags." + font_char);
+ if (flag.is_empty ())
+ me->warning (_f ("flag `%s' not found", font_char));
+
+ SCM stroke_style_scm = me->get_property ("stroke-style");
+ if (scm_is_string (stroke_style_scm))
{
- staffline_offs = "";
- }
- char c = (get_direction (me) == UP) ? 'u' : 'd';
- String index_str
- = String ("flags-") + style + to_str (c) + staffline_offs + to_str (flag_i (me));
- Molecule m
- = Font_interface::get_default_font (me)->find_by_name (index_str);
- if (!fstyle.empty_b ())
- m.add_molecule (Font_interface::get_default_font (me)->find_by_name (String ("flags-") + to_str (c) + fstyle));
- return m;
+ string stroke_style = ly_scm2string (stroke_style_scm);
+ if (!stroke_style.empty ())
+ {
+ string font_char = flag_style + to_string (dir) + stroke_style;
+ Stencil stroke = fm->find_by_name ("flags." + font_char);
+ if (stroke.is_empty ())
+ {
+ font_char = to_string (dir) + stroke_style;
+ stroke = fm->find_by_name ("flags." + font_char);
+ }
+ if (stroke.is_empty ())
+ me->warning (_f ("flag stroke `%s' not found", font_char));
+ else
+ flag.add_stencil (stroke);
+ }
+ }
+
+ return flag.smobbed_copy ();
}
-MAKE_SCHEME_CALLBACK (Stem,dim_callback,2);
+
+Stencil
+Stem::flag (Grob *me)
+{
+ int log = duration_log (me);
+ if (log < 3
+ || unsmob_grob (me->get_object ("beam")))
+ return Stencil ();
+
+ if (!is_normal_stem (me))
+ return Stencil ();
+
+ // This get_property call already evaluates the scheme function with
+ // the grob passed as argument! Thus, we only have to check if a valid
+ // stencil is returned.
+ SCM flag_style_scm = me->get_property ("flag");
+ if (Stencil *flag = unsmob_stencil (flag_style_scm)) {
+ return *flag;
+ } else {
+ return Stencil ();
+ }
+}
+
+MAKE_SCHEME_CALLBACK (Stem, width, 1);
SCM
-Stem::dim_callback (SCM e, SCM ax)
-{
- Axis a = (Axis) gh_scm2int (ax);
- assert (a == X_AXIS);
- Grob *se = unsmob_grob (e);
- Interval r (0, 0);
- if (unsmob_grob (se->get_grob_property ("beam")) || abs (flag_i (se)) <= 2)
- ; // TODO!
+Stem::width (SCM e)
+{
+ Grob *me = unsmob_grob (e);
+
+ Interval r;
+
+ if (is_invisible (me))
+ r.set_empty ();
+ else if (unsmob_grob (me->get_object ("beam"))
+ || abs (duration_log (me)) <= 2)
+ {
+ r = Interval (-1, 1);
+ r *= thickness (me) / 2;
+ }
else
{
- r = flag (se).extent (X_AXIS);
+ r = Interval (-1, 1) * thickness (me) * 0.5;
+ r.unite (flag (me).extent (X_AXIS));
}
return ly_interval2scm (r);
}
-
+Real
+Stem::thickness (Grob *me)
+{
+ return scm_to_double (me->get_property ("thickness"))
+ * Staff_symbol_referencer::line_thickness (me);
+}
-MAKE_SCHEME_CALLBACK (Stem,brew_molecule,1);
-
+MAKE_SCHEME_CALLBACK (Stem, print, 1);
SCM
-Stem::brew_molecule (SCM smob)
+Stem::print (SCM smob)
{
- Grob*me = unsmob_grob (smob);
- Molecule mol;
- Direction d = get_direction (me);
-
-
- Real y1 = Staff_symbol_referencer::position_f (first_head (me));
- Real y2 = stem_end_position (me);
-
- Interval stem_y (y1,y2);
- stem_y.unite (Interval (y2,y1));
-
- // dy?
- Real dy = Staff_symbol_referencer::staff_space (me)/2.0;
+ Grob *me = unsmob_grob (smob);
+ Grob *beam = get_beam (me);
- if (Grob *hed = support_head (me))
- {
- Interval head_height = hed->extent (hed,Y_AXIS);
- Real y_attach = Note_head::stem_attachment_coordinate ( hed, Y_AXIS);
+ Stencil mol;
+ Direction d = get_grob_direction (me);
- y_attach = head_height.linear_combination (y_attach);
- stem_y[Direction (-d)] += d * 2*y_attach;
- }
-
- if (!invisible_b (me))
+ Real stemlet_length = robust_scm2double (me->get_property ("stemlet-length"),
+ 0.0);
+ bool stemlet = stemlet_length > 0.0;
+
+ /* TODO: make the stem start a direction ?
+ This is required to avoid stems passing in tablature chords. */
+ Grob *lh
+ = to_boolean (me->get_property ("avoid-note-head"))
+ ? last_head (me)
+ : first_head (me);
+
+ if (!lh && !stemlet)
+ return SCM_EOL;
+
+ if (!lh && stemlet && !beam)
+ return SCM_EOL;
+
+ if (lh && robust_scm2int (lh->get_property ("duration-log"), 0) < 1)
+ return SCM_EOL;
+
+ if (is_invisible (me))
+ return SCM_EOL;
+
+ Real y2 = robust_scm2double (me->get_property ("stem-end-position"), 0.0);
+ Real y1 = y2;
+ Real half_space = Staff_symbol_referencer::staff_space (me) * 0.5;
+
+ if (lh)
+ y2 = Staff_symbol_referencer::get_position (lh);
+ else if (stemlet)
{
- Real stem_width = gh_scm2double (me->get_grob_property ("thickness"))
- // URG
- * me->paper_l ()->get_var ("stafflinethickness");
-
- Molecule ss =Lookup::filledbox (Box (Interval (-stem_width/2, stem_width/2),
- Interval (stem_y[DOWN]*dy, stem_y[UP]*dy)));
- mol.add_molecule (ss);
+ Real beam_translation = Beam::get_beam_translation (beam);
+ Real beam_thickness = Beam::get_beam_thickness (beam);
+ int beam_count = beam_multiplicity (me).length () + 1;
+
+ y2 -= d
+ * (0.5 * beam_thickness
+ + beam_translation * max (0, (beam_count - 1))
+ + stemlet_length) / half_space;
}
- if (!beam_l (me) && abs (flag_i (me)) > 2)
+ Interval stem_y (min (y1, y2), max (y2, y1));
+
+ if (Grob *head = support_head (me))
{
- Molecule fl = flag (me);
- fl.translate_axis (stem_y[d]*dy, Y_AXIS);
- mol.add_molecule (fl);
+ /*
+ must not take ledgers into account.
+ */
+ Interval head_height = head->extent (head, Y_AXIS);
+ Real y_attach = Note_head::stem_attachment_coordinate (head, Y_AXIS);
+
+ y_attach = head_height.linear_combination (y_attach);
+ stem_y[Direction (-d)] += d * y_attach / half_space;
}
+ // URG
+ Real stem_width = thickness (me);
+ Real blot
+ = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
+
+ Box b = Box (Interval (-stem_width / 2, stem_width / 2),
+ Interval (stem_y[DOWN] * half_space, stem_y[UP] * half_space));
+
+ Stencil ss = Lookup::round_filled_box (b, blot);
+ mol.add_stencil (ss);
+
+ mol.add_stencil (get_translated_flag (me));
+
return mol.smobbed_copy ();
}
+Stencil
+Stem::get_translated_flag (Grob *me)
+{
+ Stencil fl = flag (me);
+ if (!fl.is_empty ())
+ {
+ Direction d = get_grob_direction (me);
+ Real blot
+ = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
+ Real stem_width = thickness (me);
+ Real half_space = Staff_symbol_referencer::staff_space (me) * 0.5;
+ Real y2 = robust_scm2double (me->get_property ("stem-end-position"), 0.0);
+ fl.translate_axis (y2 * half_space - d * blot / 2, Y_AXIS);
+ fl.translate_axis (stem_width / 2, X_AXIS);
+ }
+ return fl;
+}
+
+
/*
move the stem to right of the notehead if it is up.
- */
-MAKE_SCHEME_CALLBACK (Stem,off_callback,2);
+*/
+MAKE_SCHEME_CALLBACK (Stem, offset_callback, 1);
SCM
-Stem::off_callback (SCM element_smob, SCM)
+Stem::offset_callback (SCM smob)
{
- Grob *me = unsmob_grob (element_smob);
-
- Real r=0;
- if (Grob * f = first_head (me))
+ Grob *me = unsmob_grob (smob);
+
+ extract_grob_set (me, "rests", rests);
+ if (rests.size ())
{
- Interval head_wid = Note_head::head_extent(f, X_AXIS);
+ Grob *rest = rests.back ();
+ Real r = rest->extent (rest, X_AXIS).center ();
+ return scm_from_double (r);
+ }
- Real attach =
- Note_head::stem_attachment_coordinate(f, X_AXIS);
+
+ if (Grob *f = first_head (me))
+ {
+ Interval head_wid = f->extent (f, X_AXIS);
+ Real attach = 0.0;
- Direction d = get_direction (me);
+ if (is_invisible (me))
+ attach = 0.0;
+ else
+ attach = Note_head::stem_attachment_coordinate (f, X_AXIS);
+ Direction d = get_grob_direction (me);
Real real_attach = head_wid.linear_combination (d * attach);
+ Real r = real_attach;
- r = real_attach;
-
- /*
- If not centered: correct for stem thickness.
- */
+ /* If not centered: correct for stem thickness. */
if (attach)
{
- Real rule_thick
- = gh_scm2double (me->get_grob_property ("thickness"))
- * me->paper_l ()->get_var ("stafflinethickness");
-
-
- r += - d * rule_thick * 0.5;
+ Real rule_thick = thickness (me);
+ r += -d * rule_thick * 0.5;
}
+ return scm_from_double (r);
}
- return gh_double2scm (r);
-}
-
+ programming_error ("Weird stem.");
+ return scm_from_double (0.0);
+}
-Grob*
-Stem::beam_l (Grob*me)
+Spanner *
+Stem::get_beam (Grob *me)
{
- SCM b= me->get_grob_property ("beam");
- return unsmob_grob (b);
+ SCM b = me->get_object ("beam");
+ return dynamic_cast<Spanner *> (unsmob_grob (b));
}
-
-// ugh still very long.
Stem_info
-Stem::calc_stem_info (Grob*me)
+Stem::get_stem_info (Grob *me)
+{
+ Stem_info si;
+ si.dir_ = get_grob_direction (me);
+
+ SCM scm_info = me->get_property ("stem-info");
+ si.ideal_y_ = scm_to_double (scm_car (scm_info));
+ si.shortest_y_ = scm_to_double (scm_cadr (scm_info));
+ return si;
+}
+
+MAKE_SCHEME_CALLBACK (Stem, calc_stem_info, 1);
+SCM
+Stem::calc_stem_info (SCM smob)
{
- Grob * beam = beam_l (me);
+ Grob *me = unsmob_grob (smob);
+ Direction my_dir = get_grob_direction (me);
- Direction beam_dir = Directional_element_interface::get (beam);
- if (!beam_dir)
+ if (!my_dir)
{
- programming_error ("Beam dir not set.");
- beam_dir = UP;
+ programming_error ("no stem dir set");
+ my_dir = UP;
}
-
Real staff_space = Staff_symbol_referencer::staff_space (me);
- Real half_space = staff_space / 2;
- int multiplicity = Beam::get_multiplicity (beam);
+ Grob *beam = get_beam (me);
+ if (beam)
+ {
+ (void) beam->get_property ("beaming");
+ }
+
+ Real beam_translation = Beam::get_beam_translation (beam);
+ Real beam_thickness = Beam::get_beam_thickness (beam);
+ int beam_count = Beam::get_direction_beam_count (beam, my_dir);
+ Real length_fraction
+ = robust_scm2double (me->get_property ("length-fraction"), 1.0);
+
+ /* Simple standard stem length */
+ SCM details = me->get_property ("details");
+ SCM lengths = ly_assoc_get (ly_symbol2scm ("beamed-lengths"), details, SCM_EOL);
+
+ Real ideal_length
+ = scm_to_double (robust_list_ref (beam_count - 1, lengths))
+ * staff_space
+ * length_fraction
+
+ /* stem only extends to center of beam
+ */
+ - 0.5 * beam_thickness;
- SCM space_proc = beam->get_grob_property ("space-function");
- SCM space = gh_call1 (space_proc, gh_int2scm (multiplicity));
- Real interbeam_f = gh_scm2double (space) * staff_space;
+ /* Condition: sane minimum free stem length (chord to beams) */
+ lengths = ly_assoc_get (ly_symbol2scm ("beamed-minimum-free-lengths"), details, SCM_EOL);
- Real thick = gh_scm2double (beam->get_grob_property ("thickness"));
- Stem_info info;
- info.idealy_f_ = chord_start_f (me);
+ Real ideal_minimum_free
+ = scm_to_double (robust_list_ref (beam_count - 1, lengths))
+ * staff_space
+ * length_fraction;
- // for simplicity, we calculate as if dir == UP
- info.idealy_f_ *= beam_dir;
- SCM grace_prop = me->get_grob_property ("grace");
+ Real height_of_my_trem = 0.0;
+ Grob *trem = unsmob_grob (me->get_object ("tremolo-flag"));
+ if (trem)
+ {
+ height_of_my_trem
+ = Stem_tremolo::vertical_length (trem)
+ /* hack a bit of space around the trem. */
+ + beam_translation;
+ }
- bool grace_b = to_boolean (grace_prop);
- Array<Real> a;
- SCM s;
-
- s = me->get_grob_property ("beamed-minimum-lengths");
- a.clear ();
- for (SCM q = s; q != SCM_EOL; q = ly_cdr (q))
- a.push (gh_scm2double (ly_car (q)));
+ /* UGH
+ It seems that also for ideal minimum length, we must use
+ the maximum beam count (for this direction):
+ \score{ \notes\relative c''{ [a8 a32] }}
- Real minimum_length = a[multiplicity <? (a.size () - 1)] * staff_space;
- s = me->get_grob_property ("beamed-lengths");
+ must be horizontal. */
+ Real height_of_my_beams = beam_thickness
+ + (beam_count - 1) * beam_translation;
- a.clear ();
- for (SCM q = s; q != SCM_EOL; q = ly_cdr (q))
- a.push (gh_scm2double (ly_car (q)));
+ Real ideal_minimum_length = ideal_minimum_free
+ + height_of_my_beams
+ + height_of_my_trem
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
- Real stem_length = a[multiplicity <? (a.size () - 1)] * staff_space;
+ ideal_length = max (ideal_length, ideal_minimum_length);
- if (!beam_dir || (beam_dir == Directional_element_interface::get (me)))
- /* normal beamed stem */
- {
- if (multiplicity)
- {
- info.idealy_f_ += thick + (multiplicity - 1) * interbeam_f;
- }
- info.miny_f_ = info.idealy_f_;
- info.maxy_f_ = INT_MAX;
+ /* Convert to Y position, calculate for dir == UP */
+ Real note_start
+ = /* staff positions */
+ head_positions (me)[my_dir] * 0.5
+ * my_dir * staff_space;
+ Real ideal_y = note_start + ideal_length;
- info.idealy_f_ += stem_length;
- info.miny_f_ += minimum_length;
+ /* Conditions for Y position */
- /*
- lowest beam of (UP) beam must never be lower than second staffline
+ /* Lowest beam of (UP) beam must never be lower than second staffline
- Hmm, reference (Wanske?)
+ Reference?
- Although this (additional) rule is probably correct,
- I expect that highest beam (UP) should also never be lower
- than middle staffline, just as normal stems.
-
- */
- bool no_extend_b = to_boolean (me->get_grob_property ("no-stem-extend"));
- if (!grace_b && !no_extend_b)
- {
- /* highest beam of (UP) beam must never be lower than middle
- staffline
- lowest beam of (UP) beam must never be lower than second staffline
- */
- info.miny_f_ =
- info.miny_f_ >? 0
- >? (- 2 * half_space - thick
- + (multiplicity > 0) * thick
- + interbeam_f * (multiplicity - 1));
- }
- }
- else
- /* knee */
- {
- info.idealy_f_ -= thick;
- info.maxy_f_ = info.idealy_f_;
- info.miny_f_ = -INT_MAX;
+ Although this (additional) rule is probably correct,
+ I expect that highest beam (UP) should also never be lower
+ than middle staffline, just as normal stems.
- info.idealy_f_ -= stem_length;
- info.maxy_f_ -= minimum_length;
- }
-
- info.idealy_f_ = (info.maxy_f_ <? info.idealy_f_) >? info.miny_f_;
+ Reference?
- s = beam->get_grob_property ("shorten");
- if (gh_number_p (s))
- info.idealy_f_ -= gh_scm2double (s);
+ Obviously not for grace beams.
- Grob *common = me->common_refpoint (beam, Y_AXIS);
- Real interstaff_f = beam_dir *
- (me->relative_coordinate (common, Y_AXIS)
- - beam->relative_coordinate (common, Y_AXIS));
+ Also, not for knees. Seems to be a good thing. */
+ bool no_extend = to_boolean (me->get_property ("no-stem-extend"));
+ bool is_knee = to_boolean (beam->get_property ("knee"));
+ if (!no_extend && !is_knee)
+ {
+ /* Highest beam of (UP) beam must never be lower than middle
+ staffline */
+ ideal_y = max (ideal_y, 0.0);
+ /* Lowest beam of (UP) beam must never be lower than second staffline */
+ ideal_y = max (ideal_y, (-staff_space
+ - beam_thickness + height_of_my_beams));
+ }
+
+ ideal_y -= robust_scm2double (beam->get_property ("shorten"), 0);
- info.idealy_f_ += interstaff_f;
- info.miny_f_ += interstaff_f;
- info.maxy_f_ += interstaff_f ;
+ SCM bemfl = ly_assoc_get (ly_symbol2scm ("beamed-extreme-minimum-free-lengths"),
+ details, SCM_EOL);
+
+ Real minimum_free
+ = scm_to_double (robust_list_ref (beam_count - 1, bemfl))
+ * staff_space
+ * length_fraction;
+
+ Real minimum_length = max (minimum_free, height_of_my_trem)
+ + height_of_my_beams
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
+
+ ideal_y *= my_dir;
+ Real minimum_y = note_start + minimum_length;
+ Real shortest_y = minimum_y * my_dir;
+
+ return scm_list_2 (scm_from_double (ideal_y),
+ scm_from_double (shortest_y));
+}
- return info;
+Slice
+Stem::beam_multiplicity (Grob *stem)
+{
+ SCM beaming = stem->get_property ("beaming");
+ Slice le = int_list_to_slice (scm_car (beaming));
+ Slice ri = int_list_to_slice (scm_cdr (beaming));
+ le.unite (ri);
+ return le;
}
bool
-Stem::has_interface (Grob*m)
+Stem::is_cross_staff (Grob *stem)
+{
+ Grob *beam = unsmob_grob (stem->get_object ("beam"));
+ return beam && Beam::is_cross_staff (beam);
+}
+
+MAKE_SCHEME_CALLBACK (Stem, calc_cross_staff, 1)
+SCM
+Stem::calc_cross_staff (SCM smob)
{
- return m && m->has_interface (ly_symbol2scm ("stem-interface"));
+ return scm_from_bool (is_cross_staff (unsmob_grob (smob)));
+}
+
+/* FIXME: Too many properties */
+ADD_INTERFACE (Stem,
+ "The stem represents the graphical stem. In addition, it"
+ " internally connects note heads, beams, and tremolos. Rests"
+ " and whole notes have invisible stems.\n"
+ "\n"
+ "The following properties may be set in the @code{details}"
+ " list.\n"
+ "\n"
+ "@table @code\n"
+ "@item beamed-lengths\n"
+ "List of stem lengths given beam multiplicity.\n"
+ "@item beamed-minimum-free-lengths\n"
+ "List of normal minimum free stem lengths (chord to beams)"
+ " given beam multiplicity.\n"
+ "@item beamed-extreme-minimum-free-lengths\n"
+ "List of extreme minimum free stem lengths (chord to beams)"
+ " given beam multiplicity.\n"
+ "@item lengths\n"
+ "Default stem lengths. The list gives a length for each"
+ " flag count.\n"
+ "@item stem-shorten\n"
+ "How much a stem in a forced direction should be shortened."
+ " The list gives an amount depending on the number of flags"
+ " and beams.\n"
+ "@end table\n",
+
+ /* properties */
+ "avoid-note-head "
+ "beam "
+ "beaming "
+ "beamlet-default-length "
+ "beamlet-max-length-proportion "
+ "default-direction "
+ "details "
+ "direction "
+ "duration-log "
+ "flag "
+ "flag-style "
+ "french-beaming "
+ "length "
+ "length-fraction "
+ "max-beam-connect "
+ "neutral-direction "
+ "no-stem-extend "
+ "note-heads "
+ "positioning-done "
+ "rests "
+ "stem-end-position "
+ "stem-info "
+ "stemlet-length "
+ "stroke-style "
+ "thickness "
+ "tremolo-flag "
+ );
+
+/****************************************************************/
+
+Stem_info::Stem_info ()
+{
+ ideal_y_ = shortest_y_ = 0;
+ dir_ = CENTER;
}
void
-Stem::set_interface (Grob*me)
-{
- me->set_interface (ly_symbol2scm ("stem-interface"));
+Stem_info::scale (Real x)
+{
+ ideal_y_ *= x;
+ shortest_y_ *= x;
}
projects / lilypond.git / blobdiff