/*
- stem.cc -- implement Stem
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 1996--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Jan Nieuwenhuizen <janneke@gnu.org>
+ Copyright (C) 1996--2015 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> // rint
+/*
+ Note that several internal functions have a calc_beam bool argument.
+ This argument means: "If set, acknowledge the fact that there is a beam
+ and deal with it. If not, give me the measurements as if there is no beam."
+ Most pure functions are called WITHOUT calc_beam, whereas non-pure functions
+ are called WITH calc_beam.
+
+ The only exception to this is ::pure_height, which calls internal_pure_height
+ with "true" for calc_beam in order to trigger the calculations of other
+ pure heights in case there is a beam. It passes false, however, to
+ internal_height and internal_pure_height for all subsequent iterations.
+*/
-#include "lookup.hh"
+#include "stem.hh"
+#include "spanner.hh"
+
+#include <cmath> // rint
+using namespace std;
+
+#include "beam.hh"
#include "directional-element-interface.hh"
+#include "dot-column.hh"
+#include "font-interface.hh"
+#include "international.hh"
+#include "lookup.hh"
+#include "misc.hh"
#include "note-head.hh"
-#include "stem.hh"
-#include "warn.hh"
#include "output-def.hh"
-#include "rhythmic-head.hh"
-#include "font-interface.hh"
-#include "stencil.hh"
#include "paper-column.hh"
-#include "misc.hh"
-#include "beam.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 "dot-column.hh"
+#include "staff-symbol-referencer.hh"
#include "stem-tremolo.hh"
+#include "warn.hh"
void
Stem::set_beaming (Grob *me, int beam_count, Direction d)
{
SCM pair = me->get_property ("beaming");
- if (!ly_c_pair_p (pair))
+ if (!scm_is_pair (pair))
{
pair = scm_cons (SCM_EOL, SCM_EOL);
me->set_property ("beaming", pair);
}
SCM lst = index_get_cell (pair, d);
- for (int i = 0; i < beam_count; i++)
- lst = scm_cons (scm_int2num (i), lst);
+ 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);
}
Stem::get_beaming (Grob *me, Direction d)
{
SCM pair = me->get_property ("beaming");
- if (!ly_c_pair_p (pair))
+ if (!scm_is_pair (pair))
return 0;
SCM lst = index_get_cell (pair, d);
- return scm_ilength (lst);
-}
+ int len = scm_ilength (lst); // -1 for dotted lists!
+ return max (len, 0);
+}
Interval
Stem::head_positions (Grob *me)
{
if (head_count (me))
{
- Drul_array<Grob*> e (extremal_heads (me));
+ Drul_array<Grob *> e (extremal_heads (me));
return Interval (Staff_symbol_referencer::get_position (e[DOWN]),
- Staff_symbol_referencer::get_position (e[UP]));
+ Staff_symbol_referencer::get_position (e[UP]));
}
return Interval ();
}
Real
Stem::chord_start_y (Grob *me)
{
- Interval hp = head_positions (me);
- if (!hp.is_empty ())
- return hp[get_direction (me)] * Staff_symbol_referencer::staff_space (me)
- * 0.5;
+ if (head_count (me))
+ return Staff_symbol_referencer::get_position (last_head (me))
+ * Staff_symbol_referencer::staff_space (me) * 0.5;
+
return 0;
}
-Real
-Stem::stem_end_position (Grob *me)
+void
+Stem::set_stem_positions (Grob *me, Real se)
{
- SCM p = me->get_property ("stem-end-position");
- Real pos;
- if (!scm_is_number (p))
- {
- pos = get_default_stem_end_position (me);
- me->set_property ("stem-end-position", scm_make_real (pos));
- }
- else
- pos = scm_to_double (p);
+ // todo: margins
+ Direction d = get_grob_direction (me);
- return pos;
-}
+ Grob *beam = unsmob<Grob> (me->get_object ("beam"));
+ if (d && d * head_positions (me)[get_grob_direction (me)] >= se * d)
+ me->warning (_ ("weird stem size, check for narrow beams"));
-Direction
-Stem::get_direction (Grob *me)
-{
- Direction d = get_grob_direction (me);
+ // trigger note collision mechanisms
+ Real stem_beg = internal_calc_stem_begin_position (me, false);
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+ Real half_space = staff_space * 0.5;
- if (!d)
- {
- d = get_default_dir (me);
- // urg, AAARGH!
- set_grob_direction (me, d);
- }
- return d;
-}
+ Interval height;
+ height[-d] = stem_beg * half_space;
+ height[d] = se * half_space + beam_end_corrective (me);
-void
-Stem::set_stemend (Grob *me, Real se)
-{
- // todo: margins
- Direction d = get_direction (me);
+ Real stemlet_length = robust_scm2double (me->get_property ("stemlet-length"),
+ 0.0);
+ bool stemlet = stemlet_length > 0.0;
- if (d && d * head_positions (me)[get_direction (me)] >= se*d)
- me->warning (_ ("Weird stem size; check for narrow beams"));
+ Grob *lh = get_reference_head (me);
- me->set_property ("stem-end-position", scm_make_real (se));
+ if (!lh)
+ {
+ if (stemlet && beam)
+ {
+ Real beam_translation = Beam::get_beam_translation (beam);
+ Real beam_thickness = Beam::get_beam_thickness (beam);
+ int beam_count = beam_multiplicity (me).length () + 1;
+
+ height[-d] = (height[d] - d
+ * (0.5 * beam_thickness
+ + beam_translation * max (0, (beam_count - 1))
+ + stemlet_length));
+ }
+ else if (!stemlet && beam)
+ height[-d] = height[d];
+ else if (stemlet && !beam)
+ me->programming_error ("Can't have a stemlet without a beam.");
+ }
+
+ me->set_property ("stem-begin-position", scm_from_double (height[-d] * 2 / staff_space));
+ me->set_property ("length", scm_from_double (height.length () * 2 / staff_space));
}
/* Note head that determines hshift for upstems
Grob *
Stem::support_head (Grob *me)
{
- if (head_count (me) == 1)
- /* UGH. */
- return unsmob_grob (ly_car (me->get_property ("note-heads")));
+ extract_grob_set (me, "note-heads", heads);
+ if (heads.size () == 1)
+ return heads[0];
+
return first_head (me);
}
int
Stem::head_count (Grob *me)
{
- return Pointer_group_interface::count (me, "note-heads");
+ return Pointer_group_interface::count (me, ly_symbol2scm ("note-heads"));
}
/* The note head which forms one end of the stem.
Grob *
Stem::first_head (Grob *me)
{
- Direction d = get_direction (me);
+ Direction d = get_grob_direction (me);
if (d)
return extremal_heads (me)[-d];
return 0;
Grob *
Stem::last_head (Grob *me)
{
- Direction d = get_direction (me);
+ Direction d = get_grob_direction (me);
if (d)
return extremal_heads (me)[d];
- return 0;
+ return 0;
}
-/* START is part where stem reaches `last' head.
-
-This function returns a drul with (bottom-head, top-head).
+/*
+ START is part where stem reaches `last' head.
+ This function returns a drul with (bottom-head, top-head).
*/
-Drul_array<Grob*>
+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;
+ Drul_array<Grob *> exthead (0, 0);
+ extract_grob_set (me, "note-heads", heads);
- for (SCM s = me->get_property ("note-heads"); ly_c_pair_p (s);
- s = ly_cdr (s))
+ for (vsize i = heads.size (); i--;)
{
- Grob *n = unsmob_grob (ly_car (s));
+ Grob *n = heads[i];
int p = Staff_symbol_referencer::get_rounded_position (n);
- Direction d = LEFT;
- do
- {
- if (d * p > d * extpos[d])
- {
- exthead[d] = n;
- extpos[d] = p;
- }
- } while (flip (&d) != DOWN);
+ for (LEFT_and_RIGHT (d))
+ {
+ if (d * p > d * extpos[d])
+ {
+ exthead[d] = n;
+ extpos[d] = p;
+ }
+ }
}
return exthead;
}
-static int
-icmp (int const &a, int const &b)
+/* The staff positions, in ascending order.
+ * If FILTER, include the main column of noteheads only */
+vector<int>
+Stem::note_head_positions (Grob *me, bool filter)
{
- return a - b;
-}
+ vector<int> ps;
+ extract_grob_set (me, "note-heads", heads);
+ Grob *xref = common_refpoint_of_array (heads, me, X_AXIS);
-/* The positions, in ascending order. */
-Array<int>
-Stem::note_head_positions (Grob *me)
-{
- Array<int> ps ;
- for (SCM s = me->get_property ("note-heads"); ly_c_pair_p (s);
- s = ly_cdr (s))
+ for (vsize i = heads.size (); i--;)
{
- Grob *n = unsmob_grob (ly_car (s));
- int p = Staff_symbol_referencer::get_rounded_position (n);
+ Grob *n = heads[i];
+ if (filter
+ && n->relative_coordinate (xref, X_AXIS) != 0.0)
+ continue;
- ps.push (p);
+ int p = Staff_symbol_referencer::get_rounded_position (n);
+ ps.push_back (p);
}
- ps.sort (icmp);
+ vector_sort (ps, less<int> ());
return ps;
}
void
Stem::add_head (Grob *me, Grob *n)
{
- n->set_property ("stem", me->self_scm ());
- n->add_dependency (me);
+ n->set_object ("stem", me->self_scm ());
- /* TODO: why not store Rest pointers? */
- if (Note_head::has_interface (n))
+ if (has_interface<Note_head> (n))
Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-heads"), n);
+ else if (has_interface<Rest> (n))
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("rests"), n);
}
bool
Stem::is_invisible (Grob *me)
{
- return !(head_count (me)
- && scm_to_int (me->get_property ("duration-log")) >= 1);
+ if (is_normal_stem (me))
+ return false;
+ else if (head_count (me))
+ return true;
+ else // if there are no note-heads, we might want stemlets
+ return 0.0 == robust_scm2double (me->get_property ("stemlet-length"), 0.0);
}
-Direction
-Stem::get_default_dir (Grob *me)
+bool
+Stem::is_normal_stem (Grob *me)
{
- int staff_center = 0;
- Interval hp = head_positions (me);
- if (hp.is_empty ())
- return CENTER;
+ if (!head_count (me))
+ return false;
+
+ return scm_to_int (me->get_property ("duration-log")) >= 1;
+}
+
+MAKE_SCHEME_CALLBACK (Stem, pure_height, 3)
+SCM
+Stem::pure_height (SCM smob,
+ SCM /* start */,
+ SCM /* end */)
+{
+ Grob *me = unsmob<Grob> (smob);
+ return ly_interval2scm (internal_pure_height (me, true));
+}
+
+Interval
+Stem::internal_pure_height (Grob *me, bool calc_beam)
+{
+ if (!is_normal_stem (me))
+ return Interval (0.0, 0.0);
+
+ Grob *beam = unsmob<Grob> (me->get_object ("beam"));
+
+ Interval iv = internal_height (me, false);
- int udistance = (int) (UP * hp[UP] - staff_center);
- int ddistance = (int) (DOWN * hp[DOWN] - staff_center);
+ if (!beam)
+ return iv;
+ if (calc_beam)
+ {
+ Interval overshoot;
+ Direction dir = get_grob_direction (me);
+ for (DOWN_and_UP (d))
+ overshoot[d] = d == dir ? dir * infinity_f : iv[d];
+
+ vector<Interval> heights;
+ vector<Grob *> my_stems;
+ extract_grob_set (beam, "normal-stems", normal_stems);
+ for (vsize i = 0; i < normal_stems.size (); i++)
+ if (get_grob_direction (normal_stems[i]) == dir)
+ {
+ if (normal_stems[i] != me)
+ heights.push_back (Stem::internal_pure_height (normal_stems[i], false));
+ else
+ heights.push_back (iv);
+ my_stems.push_back (normal_stems[i]);
+ }
+ //iv.unite (heights.back ());
+ // look for cross staff effects
+ vector<Real> coords;
+ Grob *common = common_refpoint_of_array (my_stems, me, Y_AXIS);
+ Real min_pos = infinity_f;
+ Real max_pos = -infinity_f;
+ for (vsize i = 0; i < my_stems.size (); i++)
+ {
+ coords.push_back (my_stems[i]->pure_relative_y_coordinate (common, 0, INT_MAX));
+ min_pos = min (min_pos, coords[i]);
+ max_pos = max (max_pos, coords[i]);
+ }
+ for (vsize i = 0; i < heights.size (); i++)
+ {
+ heights[i][dir] += dir == DOWN
+ ? coords[i] - max_pos
+ : coords[i] - min_pos;
+ }
+
+ for (vsize i = 0; i < heights.size (); i++) iv.unite (heights[i]);
+
+ for (vsize i = 0; i < my_stems.size (); i++)
+ cache_pure_height (my_stems[i], iv, heights[i]);
+ iv.intersect (overshoot);
+ }
- if (sign (ddistance - udistance))
- return Direction (sign (ddistance - udistance));
+ return iv;
+}
+
+void
+Stem::cache_pure_height (Grob *me, Interval iv, Interval my_iv)
+{
+ Interval overshoot;
+ Direction dir = get_grob_direction (me);
+ for (DOWN_and_UP (d))
+ overshoot[d] = d == dir ? dir * infinity_f : my_iv[d];
- return to_dir (me->get_property ("neutral-direction"));
+ iv.intersect (overshoot);
+ dynamic_cast<Item *> (me)->cache_pure_height (iv);
+}
+
+MAKE_SCHEME_CALLBACK (Stem, calc_stem_end_position, 1)
+SCM
+Stem::calc_stem_end_position (SCM smob)
+{
+ Grob *me = unsmob<Grob> (smob);
+ return scm_from_double (internal_calc_stem_end_position (me, true));
+}
+
+MAKE_SCHEME_CALLBACK (Stem, pure_calc_stem_end_position, 3)
+SCM
+Stem::pure_calc_stem_end_position (SCM smob,
+ SCM, /* start */
+ SCM /* end */)
+{
+ Grob *me = unsmob<Grob> (smob);
+ return scm_from_double (internal_calc_stem_end_position (me, false));
}
Real
-Stem::get_default_stem_end_position (Grob *me)
+Stem::internal_calc_stem_end_position (Grob *me, bool calc_beam)
{
+ if (!head_count (me))
+ return 0.0;
+
+ Grob *beam = get_beam (me);
Real ss = Staff_symbol_referencer::staff_space (me);
- int durlog = duration_log (me);
- SCM s;
- Array<Real> a;
+ Direction dir = get_grob_direction (me);
- /* WARNING: IN HALF SPACES */
- Real length = 7;
- SCM scm_len = me->get_property ("length");
- if (scm_is_number (scm_len))
- length = scm_to_double (scm_len);
- else
+ if (beam && calc_beam)
{
- s = me->get_property ("lengths");
- if (ly_c_pair_p (s))
- length = 2 * scm_to_double (robust_list_ref (durlog - 2, s));
+ (void) beam->get_property ("quantized-positions");
+ return robust_scm2double (me->get_property ("length"), 0.0)
+ + dir * robust_scm2double (me->get_property ("stem-begin-position"), 0.0);
}
- /* URGURGURG
- 'set-default-stemlen' sets direction too. */
- Direction dir = get_direction (me);
- if (!dir)
- {
- dir = get_default_dir (me);
- set_grob_direction (me, dir);
- }
+ vector<Real> a;
+
+ /* WARNING: IN HALF SPACES */
+ SCM details = me->get_property ("details");
+ int durlog = duration_log (me);
+
+ Real staff_rad = Staff_symbol_referencer::staff_radius (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));
/* Stems in unnatural (forced) direction should be shortened,
according to [Roush & Gourlay] */
Interval hp = head_positions (me);
if (dir && dir * hp[dir] >= 0)
{
- SCM sshorten = me->get_property ("stem-shorten");
- SCM scm_shorten = ly_c_pair_p (sshorten) ?
- robust_list_ref ((duration_log (me) - 2) >? 0, sshorten): SCM_EOL;
- Real shorten = 2* robust_scm2double (scm_shorten,0);
-
- /* On boundary: shorten only half */
- if (abs (head_positions (me)[dir]) <= 1)
- shorten *= 0.5;
+ 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_property = 2 * robust_scm2double (scm_shorten, 0);
+ /* change in length between full-size and shortened stems is executed gradually.
+ "transition area" = stems between full-sized and fully-shortened.
+ */
+ Real quarter_stem_length = 2 * scm_to_double (robust_list_ref (0, s));
+ /* shortening_step = difference in length between consecutive stem lengths
+ in transition area. The bigger the difference between full-sized
+ and shortened stems, the bigger shortening_step is.
+ (but not greater than 1/2 and not smaller than 1/4).
+ value 6 is heuristic; it determines the suggested transition slope steepnesas.
+ */
+ Real shortening_step = min (max (0.25, (shorten_property / 6)), 0.5);
+ /* Shortening of unflagged stems should begin on the first stem that sticks
+ more than 1 staffspace (2 units) out of the staff.
+ Shortening of flagged stems begins in the same moment as unflagged ones,
+ but not earlier than on the middle line note.
+ */
+ Real which_step = (min (1.0, quarter_stem_length - (2 * staff_rad) - 2.0)) + abs (hp[dir]);
+ Real shorten = min (max (0.0, (shortening_step * which_step)), shorten_property);
length -= shorten;
}
+ length *= robust_scm2double (me->get_property ("length-fraction"), 1.0);
+
/* Tremolo stuff. */
- Grob *t_flag = unsmob_grob (me->get_property ("tremolo-flag"));
- if (t_flag && !unsmob_grob (me->get_property ("beam")))
+ Grob *t_flag = unsmob<Grob> (me->get_object ("tremolo-flag"));
+ if (t_flag && (!unsmob<Grob> (me->get_object ("beam")) || !calc_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 */
+ 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::raw_stencil (t_flag).extent (Y_AXIS).length ()
- / ss;
+ + 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)
- {
- Interval flag_ext = flag (me).extent (Y_AXIS);
- if (!flag_ext.is_empty ())
- minlen += 2 * flag_ext.length () / ss;
-
- /* The clash is smaller for down stems (since the tremolo is
- angled up.) */
- if (dir == DOWN)
- minlen -= 1.0;
- }
- length = length >? (minlen + 1.0);
+ {
+ 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);
}
- Real st = dir ? hp[dir] + dir * length : 0;
+ Real stem_end = dir ? hp[dir] + dir * length : 0;
/* TODO: change name to extend-stems to staff/center/'() */
- bool no_extend_b = to_boolean (me->get_property ("no-stem-extend"));
- if (!no_extend_b && dir * st < 0)
- st = 0.0;
-
- /* Make a little room if we have a upflag and there is a dot.
- previous approach was to lengthen the stem. This is not
- good typesetting practice. */
- if (!get_beam (me) && dir == UP
- && durlog > 2)
- {
- Grob * closest_to_flag = extremal_heads (me)[dir];
- Grob * dots = closest_to_flag
- ? Rhythmic_head::get_dots (closest_to_flag ) : 0;
-
- if (dots)
- {
- Real dp = Staff_symbol_referencer::get_position (dots);
- Real flagy = flag (me).extent (Y_AXIS)[-dir] * 2 / ss;
-
- /* Very gory: add myself to the X-support of the parent,
- which should be a dot-column. */
- if (dir * (st + flagy - dp) < 0.5)
- {
- Grob *par = dots->get_parent (X_AXIS);
-
- if (Dot_column::has_interface (par))
- {
- Side_position_interface::add_support (par, me);
-
- /* TODO: apply some better logic here. The flag is
- curved inwards, so this will typically be too
- much. */
- }
- }
- }
- }
- return st;
+ bool no_extend = to_boolean (me->get_property ("no-stem-extend"));
+ if (!no_extend && dir * stem_end < 0)
+ stem_end = 0.0;
+
+ return stem_end;
}
/* The log of the duration (Number of hooks on the flag minus two) */
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)
{
+ Grob *me = unsmob<Grob> (smob);
if (!head_count (me))
- return;
+ return SCM_BOOL_T;
- Link_array<Grob> heads =
- Pointer_group_interface__extract_grobs (me, (Grob*) 0, "note-heads");
+ me->set_property ("positioning-done", SCM_BOOL_T);
- heads.sort (compare_position);
- Direction dir = get_direction (me);
+ 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);
+ if (!dir)
+ {
+ programming_error ("Stem dir must be up or down.");
+ dir = UP;
+ set_grob_direction (me, dir);
+ }
+
+ bool is_harmonic_centered = false;
+ for (vsize i = 0; i < heads.size (); i++)
+ is_harmonic_centered = is_harmonic_centered
+ || scm_is_eq (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 (int i = 0; i < heads.size (); i++)
- heads[i]->translate_axis (w - heads[i]->extent (heads[i], X_AXIS)[dir],
- X_AXIS);
+ 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);
+ if (!isnan (amount)) // empty heads can produce NaN
+ heads[i]->translate_axis (amount, X_AXIS);
+ }
bool parity = true;
Real lastpos = Real (Staff_symbol_referencer::get_position (heads[0]));
- for (int i = 1; i < heads.size (); i ++)
+ int threshold = robust_scm2int (me->get_property ("note-collision-threshold"), 1);
+ for (vsize i = 1; i < heads.size (); i++)
{
Real p = Staff_symbol_referencer::get_position (heads[i]);
- Real dy =fabs (lastpos- p);
+ Real dy = fabs (lastpos - p);
/*
- dy should always be 0.5, 0.0, 1.0, but provide safety margin
- for rounding errors.
+ dy should always be 0.5, 0.0, 1.0, but provide safety margin
+ for rounding errors.
*/
- if (dy < 1.1)
- {
- if (parity)
- {
- Real ell = heads[i]->extent (heads[i], X_AXIS).length ();
-
- Direction d = get_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.
-
- |
+ if (dy < 0.1 + threshold)
+ {
+ if (parity)
+ {
+ 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;
+
+ /*
+ However, the first reverse head has to be shifted even
+ more than the full reverse overlap if it is the same
+ height as the first head or there will be a gap
+ because of the head slant (issue 346).
+ */
+
+ if (i == 1 && dy < 0.1)
+ reverse_overlap = 1.1;
+
+ if (is_invisible (me))
+ {
+ // Semibreves and longer are tucked in considerably
+ // to be recognizable as chorded rather than
+ // parallel voices. During the course of issue 346
+ // there was a discussion to change this for unisons
+ // (dy < 0.1) to reduce overlap but without reaching
+ // agreement and with Gould being rather on the
+ // overlapping front.
+ reverse_overlap = 2;
+ }
+
+ heads[i]->translate_axis ((ell - thick * 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;
- }
+ |X <- kern this.
+ |
+ X
+
+ */
+ }
+ parity = !parity;
+ }
else
- parity = true;
+ 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);
-
- /*
- Do the calculations for visible stems, but also for invisible stems
- with note heads (i.e. half notes.)
- */
- if (head_count (me))
+ Grob *me = unsmob<Grob> (smob);
+ Direction dir = CENTER;
+ if (Grob *beam = unsmob<Grob> (me->get_object ("beam")))
{
- stem_end_position (me); // ugh. Trigger direction calc.
- position_noteheads (me);
+ SCM ignore_me = beam->get_property ("direction");
+ (void) ignore_me;
+ dir = get_grob_direction (me);
}
else
- me->set_property ("print-function", SCM_EOL);
-
- return SCM_UNSPECIFIED;
+ {
+ SCM dd = me->get_property ("default-direction");
+ dir = to_dir (dd);
+ if (!dir)
+ return me->get_property ("neutral-direction");
+ }
+
+ 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)scm_to_int (ax);
- Grob *me = unsmob_grob (smob);
- assert (a == Y_AXIS);
+ Grob *me = unsmob<Grob> (smob);
- /*
- ugh. - this dependency should be automatic.
- */
- Grob *beam= get_beam (me);
- if (beam)
+ Direction dir = CENTER;
+ int staff_center = 0;
+ if (head_count (me))
{
- Beam::after_line_breaking (beam->self_scm ());
- }
-
+ Interval hp = head_positions (me);
+ int udistance = (int) (UP * hp[UP] - staff_center);
+ int ddistance = (int) (DOWN * hp[DOWN] - staff_center);
- SCM mol = me->get_uncached_stencil ();
- Interval iv;
- if (mol != SCM_EOL)
- iv = unsmob_stencil (mol)->extent (a);
- if (Grob *b =get_beam (me))
- {
- Direction d = get_direction (me);
- iv[d] += d * Beam::get_thickness (b) * 0.5 ;
+ dir = Direction (sign (ddistance - udistance));
}
- return ly_interval2scm (iv);
+ return scm_from_int (dir);
}
+// note - height property necessary to trigger quantized beam positions
+// otherwise, we could just use Grob::stencil_height_proc
+MAKE_SCHEME_CALLBACK (Stem, height, 1);
+SCM
+Stem::height (SCM smob)
+{
+ Grob *me = unsmob<Grob> (smob);
+ return ly_interval2scm (internal_height (me, true));
+}
-Stencil
-Stem::flag (Grob *me)
+Grob *
+Stem::get_reference_head (Grob *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 ();
-
- bool adjust = true;
-
- String staffline_offs;
- if (String::compare (flag_style, "mensural") == 0)
- /* 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,
- regardless if the note head is on a staff line or between two
- staff lines. In other words, the inner end of a flag always
- touches a staff line.
- */
- {
- if (adjust)
- {
- int p = (int)(rint (stem_end_position (me)));
- staffline_offs =
- Staff_symbol_referencer::on_staffline (me, p) ? "0" : "1";
- }
- else
- {
- staffline_offs = "2";
- }
- }
- else
+ return to_boolean (me->get_property ("avoid-note-head"))
+ ? last_head (me)
+ : first_head (me);
+}
+
+Real
+Stem::beam_end_corrective (Grob *me)
+{
+ Grob *beam = unsmob<Grob> (me->get_object ("beam"));
+ Direction dir = get_grob_direction (me);
+ if (beam)
{
- staffline_offs = "";
+ if (dir == CENTER)
+ {
+ programming_error ("no stem direction");
+ dir = UP;
+ }
+ return dir * Beam::get_beam_thickness (beam) * 0.5;
}
+ return 0.0;
+}
+
+Interval
+Stem::internal_height (Grob *me, bool calc_beam)
+{
+ Grob *beam = get_beam (me);
+ if (!is_valid_stem (me) && !beam)
+ return Interval ();
- char dir = (get_direction (me) == UP) ? 'u' : 'd';
- String font_char = flag_style
- + to_string (dir) + staffline_offs + to_string (duration_log (me));
- 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));
+ Direction dir = get_grob_direction (me);
- SCM stroke_style_scm = me->get_property ("stroke-style");
- if (scm_is_string (stroke_style_scm))
+ if (beam && calc_beam)
{
- String stroke_style = ly_scm2string (stroke_style_scm);
- if (!stroke_style.is_empty ())
- {
- String font_char = to_string (dir) + stroke_style;
- Stencil 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);
- }
+ /* trigger set-stem-lengths. */
+ (void) beam->get_property ("quantized-positions");
}
- return flag;
+ /*
+ If there is a beam but no stem, slope calculations depend on this
+ routine to return where the stem end /would/ be.
+ */
+ if (calc_beam && !beam && !unsmob<Stencil> (me->get_property ("stencil")))
+ return Interval ();
+
+ Real y1 = robust_scm2double ((calc_beam
+ ? me->get_property ("stem-begin-position")
+ : me->get_pure_property ("stem-begin-position", 0, INT_MAX)),
+ 0.0);
+
+ Real y2 = dir * robust_scm2double ((calc_beam
+ ? me->get_property ("length")
+ : me->get_pure_property ("length", 0, INT_MAX)),
+ 0.0)
+ + y1;
+
+ Real half_space = Staff_symbol_referencer::staff_space (me) * 0.5;
+
+ Interval stem_y = Interval (min (y1, y2), max (y2, y1)) * half_space;
+
+ return stem_y;
}
-MAKE_SCHEME_CALLBACK (Stem,dim_callback,2);
+MAKE_SCHEME_CALLBACK (Stem, width, 1);
SCM
-Stem::dim_callback (SCM e, SCM ax)
+Stem::width (SCM e)
{
- Axis a = (Axis) scm_to_int (ax);
- assert (a == X_AXIS);
- Grob *me = unsmob_grob (e);
+ Grob *me = unsmob<Grob> (e);
Interval r;
-
+
if (is_invisible (me))
- {
- r.set_empty ();
- }
- else if (unsmob_grob (me->get_property ("beam")) || abs (duration_log (me)) <= 2)
- {
- r = Interval (-1,1);
- r *= thickness (me)/2;
- }
+ r.set_empty ();
else
{
- r = flag (me).extent (X_AXIS)
- + thickness (me)/2;
- }
+ r = Interval (-1, 1);
+ r *= thickness (me) / 2;
+ }
+
return ly_interval2scm (r);
}
Stem::thickness (Grob *me)
{
return scm_to_double (me->get_property ("thickness"))
- * Staff_symbol_referencer::line_thickness (me);
+ * Staff_symbol_referencer::line_thickness (me);
}
-MAKE_SCHEME_CALLBACK (Stem, print, 1);
+MAKE_SCHEME_CALLBACK (Stem, calc_stem_begin_position, 1);
SCM
-Stem::print (SCM smob)
+Stem::calc_stem_begin_position (SCM smob)
{
- Grob *me = unsmob_grob (smob);
- Stencil mol;
- Direction d = get_direction (me);
+ Grob *me = unsmob<Grob> (smob);
+ return scm_from_double (internal_calc_stem_begin_position (me, true));
+}
+
+MAKE_SCHEME_CALLBACK (Stem, pure_calc_stem_begin_position, 3);
+SCM
+Stem::pure_calc_stem_begin_position (SCM smob,
+ SCM, /* start */
+ SCM /* end */)
+{
+ Grob *me = unsmob<Grob> (smob);
+ return scm_from_double (internal_calc_stem_begin_position (me, false));
+}
+
+Real
+Stem::internal_calc_stem_begin_position (Grob *me, bool calc_beam)
+{
+ Grob *beam = get_beam (me);
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ if (beam && calc_beam)
+ {
+ (void) beam->get_property ("quantized-positions");
+ return robust_scm2double (me->get_property ("stem-begin-position"), 0.0);
+ }
+
+ Direction d = get_grob_direction (me);
+ Grob *lh = get_reference_head (me);
+ if (!lh)
+ return 0.0;
+
+ Real pos = Staff_symbol_referencer::get_position (lh);
+
+ if (Grob *head = support_head (me))
+ {
+ 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);
+ if (!isinf (y_attach) && !isnan (y_attach)) // empty heads
+ pos += d * y_attach * 2 / ss;
+ }
+
+ return pos;
+}
+
+
+MAKE_SCHEME_CALLBACK (Stem, pure_calc_length, 3);
+SCM
+Stem::pure_calc_length (SCM smob, SCM /*start*/, SCM /*end*/)
+{
+ Grob *me = unsmob<Grob> (smob);
+ Real beg = robust_scm2double (me->get_pure_property ("stem-begin-position", 0, INT_MAX), 0.0);
+ Real res = fabs (internal_calc_stem_end_position (me, false) - beg);
+ return scm_from_double (res);
+}
+
+MAKE_SCHEME_CALLBACK (Stem, calc_length, 1);
+SCM
+Stem::calc_length (SCM smob)
+{
+ Grob *me = unsmob<Grob> (smob);
+ if (unsmob<Grob> (me->get_object ("beam")))
+ {
+ me->programming_error ("ly:stem::calc-length called but will not be used for beamed stem.");
+ return scm_from_double (0.0);
+ }
+
+ Real beg = robust_scm2double (me->get_property ("stem-begin-position"), 0.0);
+ Real res = fabs (internal_calc_stem_end_position (me, true) - beg);
+ return scm_from_double (res);
+}
+
+bool
+Stem::is_valid_stem (Grob *me)
+{
/* 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) : lh = first_head (me);
+ if (!me)
+ return false;
+ Grob *lh = get_reference_head (me);
+ Grob *beam = unsmob<Grob> (me->get_object ("beam"));
- if (!lh)
- return SCM_EOL;
+ if (!lh && !beam)
+ return false;
if (is_invisible (me))
- return SCM_EOL;
+ return false;
- Real y1 = Staff_symbol_referencer::get_position (lh);
- Real y2 = stem_end_position (me);
+ return true;
+}
- Interval stem_y (y1 <? y2,y2 >? y1);
+MAKE_SCHEME_CALLBACK (Stem, print, 1);
+SCM
+Stem::print (SCM smob)
+{
+ Grob *me = unsmob<Grob> (smob);
+ if (!is_valid_stem (me))
+ return SCM_EOL;
- // dy?
- Real dy = Staff_symbol_referencer::staff_space (me) * 0.5;
+ Direction dir = get_grob_direction (me);
+ Real y1 = robust_scm2double (me->get_property ("stem-begin-position"), 0.0);
+ Real y2 = dir * robust_scm2double (me->get_property ("length"), 0.0) + y1;
- if (Grob *hed = support_head (me))
- {
- /*
- must not take ledgers into account.
- */
- Interval head_height = hed->extent (hed,Y_AXIS);
- Real y_attach = Note_head::stem_attachment_coordinate (hed, Y_AXIS);
+ Real half_space = Staff_symbol_referencer::staff_space (me) * 0.5;
- y_attach = head_height.linear_combination (y_attach);
- stem_y[Direction (-d)] += d * y_attach/dy;
- }
+ Interval stem_y = Interval (min (y1, y2), max (y2, y1)) * half_space;
+ stem_y[dir] -= beam_end_corrective (me);
// URG
Real stem_width = thickness (me);
- Real blot =
- me->get_paper ()->get_dimension (ly_symbol2scm ("blotdiameter"));
+ Real blot
+ = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
- Box b = Box (Interval (-stem_width/2, stem_width/2),
- Interval (stem_y[DOWN]*dy, stem_y[UP]*dy));
+ Box b = Box (Interval (-stem_width / 2, stem_width / 2),
+ stem_y);
+ Stencil mol;
Stencil ss = Lookup::round_filled_box (b, blot);
mol.add_stencil (ss);
- if (!get_beam (me) && abs (duration_log (me)) > 2)
- {
- Stencil fl = flag (me);
- fl.translate_axis (stem_y[d]*dy - d * blot/2, Y_AXIS);
- fl.translate_axis (stem_width/2, X_AXIS);
- mol.add_stencil (fl);
- }
-
return mol.smobbed_copy ();
}
/*
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 = 0.0;
-
- if (head_count (me))
- if (Grob *f = first_head (me))
- {
- Interval head_wid = f->extent (f, X_AXIS);
- Real attach = 0.0;
-
- if (is_invisible (me))
- attach = 0.0;
- else
- attach = Note_head::stem_attachment_coordinate (f, X_AXIS);
-
- Direction d = get_direction (me);
- Real real_attach = head_wid.linear_combination (d * attach);
- r = real_attach;
-
- /* If not centered: correct for stem thickness. */
- if (attach)
- {
- Real rule_thick = thickness (me);
- r += - d * rule_thick * 0.5;
- }
- }
- return scm_make_real (r);
+ Grob *me = unsmob<Grob> (smob);
+
+ extract_grob_set (me, "rests", rests);
+ if (rests.size ())
+ {
+ Grob *rest = rests.back ();
+ Real r = robust_relative_extent (rest, rest, X_AXIS).center ();
+ return scm_from_double (r);
+ }
+
+ if (Grob *f = first_head (me))
+ {
+ Interval head_wid = f->extent (f, X_AXIS);
+ Real attach = 0.0;
+
+ 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 = isnan(real_attach)? 0.0: real_attach;
+
+ /* If not centered: correct for stem thickness. */
+ string style = robust_symbol2string (f->get_property ("style"), "default");
+ if (attach && style != "mensural"
+ && style != "neomensural"
+ && style != "petrucci")
+ {
+ Real rule_thick = thickness (me);
+ r += -d * rule_thick * 0.5;
+ }
+ return scm_from_double (r);
+ }
+
+ programming_error ("Weird stem.");
+ return scm_from_double (0.0);
}
Spanner *
Stem::get_beam (Grob *me)
{
- SCM b = me->get_property ("beam");
- return dynamic_cast<Spanner*> (unsmob_grob (b));
+ SCM b = me->get_object ("beam");
+ return unsmob<Spanner> (b);
}
Stem_info
Stem::get_stem_info (Grob *me)
{
- /* Return cached info if available */
- SCM scm_info = me->get_property ("stem-info");
- if (!ly_c_pair_p (scm_info))
- {
- calc_stem_info (me);
- scm_info = me->get_property ("stem-info");
- }
-
Stem_info si;
si.dir_ = get_grob_direction (me);
- si.ideal_y_ = scm_to_double (ly_car (scm_info));
- si.shortest_y_ = scm_to_double (ly_cadr (scm_info));
+
+ 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;
}
-
-/* TODO: add extra space for tremolos! */
-void
-Stem::calc_stem_info (Grob *me)
+MAKE_SCHEME_CALLBACK (Stem, calc_stem_info, 1);
+SCM
+Stem::calc_stem_info (SCM smob)
{
+ Grob *me = unsmob<Grob> (smob);
Direction my_dir = get_grob_direction (me);
if (!my_dir)
{
- programming_error ("No stem dir set?");
- my_dir = UP;
+ programming_error ("no stem dir set");
+ my_dir = UP;
}
Real staff_space = Staff_symbol_referencer::staff_space (me);
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_thickness (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 lengths = me->get_property ("beamed-lengths");
- Real ideal_length =
- scm_to_double (robust_list_ref (beam_count - 1,lengths))
-
- * staff_space
- /* stem only extends to center of beam
- */
- - 0.5 * beam_thickness
- ;
+ SCM details = me->get_property ("details");
+ SCM lengths = ly_assoc_get (ly_symbol2scm ("beamed-lengths"), details, SCM_EOL);
+
+ Real ideal_length
+ = (scm_is_pair (lengths)
+ ? (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)
+ : 0.0);
/* Condition: sane minimum free stem length (chord to beams) */
- lengths = me->get_property ("beamed-minimum-free-lengths");
- Real ideal_minimum_free =
- scm_to_double (robust_list_ref (beam_count - 1, lengths))
- * staff_space;
-
+ lengths = ly_assoc_get (ly_symbol2scm ("beamed-minimum-free-lengths"),
+ details, SCM_EOL);
+
+ Real ideal_minimum_free
+ = (scm_is_pair (lengths)
+ ? (scm_to_double (robust_list_ref (beam_count - 1, lengths))
+ * staff_space
+ * length_fraction)
+ : 0.0);
+
+ 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;
+ }
/* 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] }}
+ \score { \relative c'' { a8[ a32] } }
must be horizontal. */
Real height_of_my_beams = beam_thickness
- + (beam_count - 1) * beam_translation;
+ + (beam_count - 1) * beam_translation;
Real ideal_minimum_length = ideal_minimum_free
- + height_of_my_beams
- /* stem only extends to center of beam */
- - 0.5 * beam_thickness;
+ + height_of_my_beams
+ + height_of_my_trem
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
- ideal_length = ideal_length >? ideal_minimum_length;
+ ideal_length = max (ideal_length, ideal_minimum_length);
/* 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 note_start
+ = /* staff positions */
+ head_positions (me)[my_dir] * 0.5
+ * my_dir * staff_space;
Real ideal_y = note_start + ideal_length;
-
/* Conditions for Y position */
/* Lowest beam of (UP) beam must never be lower than second staffline
- Reference?
+ 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.
+ 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.
- Reference?
+ Reference?
- Obviously not for grace beams.
+ Obviously not for grace beams.
- Also, not for knees. Seems to be a good thing. */
- bool no_extend_b = to_boolean (me->get_property ("no-stem-extend"));
- bool is_knee = to_boolean (beam->get_property ("knee"));
- if (!no_extend_b && !is_knee)
+ Also, not for knees. Seems to be a good thing. */
+ bool no_extend = to_boolean (me->get_property ("no-stem-extend"));
+ bool is_knee = Beam::is_knee (beam);
+ if (!no_extend && !is_knee)
{
/* Highest beam of (UP) beam must never be lower than middle
- staffline */
- ideal_y = ideal_y >? 0;
+ staffline */
+ ideal_y = max (ideal_y, 0.0);
/* Lowest beam of (UP) beam must never be lower than second staffline */
- ideal_y = ideal_y >? (-staff_space
- - beam_thickness + height_of_my_beams);
+ ideal_y = max (ideal_y, (-staff_space
+ - beam_thickness + height_of_my_beams));
}
-
ideal_y -= robust_scm2double (beam->get_property ("shorten"), 0);
- Real minimum_free =
- scm_to_double (robust_list_ref
- (beam_count - 1,
- me->get_property
- ("beamed-extreme-minimum-free-lengths")))
- * staff_space;
+ SCM bemfl = ly_assoc_get (ly_symbol2scm ("beamed-extreme-minimum-free-lengths"),
+ details, SCM_EOL);
+
+ Real minimum_free
+ = (scm_is_pair (bemfl)
+ ? (scm_to_double (robust_list_ref (beam_count - 1, bemfl))
+ * staff_space
+ * length_fraction)
+ : 0.0);
- Real minimum_length = minimum_free
- + height_of_my_beams
- /* stem only extends to center of beam */
- - 0.5 * beam_thickness;
+ 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;
- me->set_property ("stem-info",
- scm_list_2 (scm_make_real (ideal_y),
- scm_make_real (shortest_y)));
+ return scm_list_2 (scm_from_double (ideal_y),
+ scm_from_double (shortest_y));
}
Slice
Stem::beam_multiplicity (Grob *stem)
{
- SCM beaming= stem->get_property ("beaming");
- Slice le = int_list_to_slice (ly_car (beaming));
- Slice ri = int_list_to_slice (ly_cdr (beaming));
+ 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::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 scm_from_bool (is_cross_staff (unsmob<Grob> (smob)));
+}
+
+Grob *
+Stem::flag (Grob *me)
+{
+ return unsmob<Grob> (me->get_object ("flag"));
+}
/* FIXME: Too many properties */
-ADD_INTERFACE (Stem, "stem-interface",
- "The stem represent the graphical stem. "
- "In addition, it internally connects note heads, beams and"
- "tremolos. "
- "Rests and whole notes have invisible stems.",
- "tremolo-flag french-beaming "
- "avoid-note-head thickness "
- "stem-info beamed-lengths beamed-minimum-free-lengths "
- "beamed-extreme-minimum-free-lengths lengths beam stem-shorten "
- "duration-log beaming neutral-direction stem-end-position "
- "note-heads direction length flag-style "
- "no-stem-extend stroke-style");
+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 "
+ "double-stem-separation "
+ "duration-log "
+ "flag "
+ "french-beaming "
+ "length "
+ "length-fraction "
+ "max-beam-connect "
+ "melody-spanner "
+ "neutral-direction "
+ "no-stem-extend "
+ "note-heads "
+ "note-collision-threshold "
+ "positioning-done "
+ "rests "
+ "stem-begin-position "
+ "stem-info "
+ "stemlet-length "
+ "thickness "
+ "tremolo-flag "
+ "tuplet-start "
+ );
/****************************************************************/
projects / lilypond.git / blobdiff