Jan Nieuwenhuizen <janneke@gnu.org>
TODO: This is way too hairy
+
+ TODO: fix naming.
+
+ Stem-end, chord-start, etc. is all confusing naming.
*/
-#include <math.h> // m_pi
+#include <math.h> // rint
#include "lookup.hh"
#include "directional-element-interface.hh"
#include "note-head.hh"
#include "stem.hh"
-#include "debug.hh"
+#include "warn.hh"
#include "paper-def.hh"
#include "rhythmic-head.hh"
#include "font-interface.hh"
#include "staff-symbol-referencer.hh"
#include "spanner.hh"
#include "side-position-interface.hh"
+#include "dot-column.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))
{
- pair = gh_cons (gh_int2scm (-1),gh_int2scm (-1));
- me-> set_grob_property ("beaming", pair);
+ pair = gh_cons (SCM_EOL, SCM_EOL);
+ me->set_grob_property ("beaming", pair);
}
- index_set_cell (pair, d, gh_int2scm (i));
-}
-int
-Stem::beam_count (Grob*me,Direction d)
-{
- SCM p=me->get_grob_property ("beaming");
- if (gh_pair_p (p))
- return gh_scm2int (index_cell (p,d));
- else
- return -1;
+ SCM l = index_get_cell (pair, d);
+ for( int i = 0; i< beam_count; i++)
+ {
+ l = gh_cons (gh_int2scm (i), l);
+ }
+ index_set_cell (pair, d, l);
}
+
Interval
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::position_f (e[DOWN]),
- Staff_symbol_referencer::position_f (e[UP]));
+ return Interval (Staff_symbol_referencer::get_position (e[DOWN]),
+ Staff_symbol_referencer::get_position (e[UP]));
}
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;
me->set_grob_property ("stem-end-position", gh_double2scm (se));
}
-int
-Stem::type_i (Grob*me)
-{
- return first_head (me) ? Rhythmic_head::balltype_i (first_head (me)) : 2;
-}
/*
Note head that determines hshift for upstems
- */
+
+ WARNING: triggers direction
+*/
Grob*
Stem::support_head (Grob*me)
{
Grob * nh = unsmob_grob (h);
if (nh)
return nh;
- else if (heads_i (me) == 1)
+ else if (head_count (me) == 1)
{
/*
UGH.
*/
- return unsmob_grob (ly_car (me->get_grob_property ("heads")));
+ return unsmob_grob (ly_car (me->get_grob_property ("note-heads")));
}
else
return first_head (me);
int
-Stem::heads_i (Grob*me)
+Stem::head_count (Grob*me)
{
- return Pointer_group_interface::count (me, "heads");
+ return Pointer_group_interface::count (me, "note-heads");
}
/*
The note head which forms one end of the stem.
- */
+
+ WARNING: triggers direction
+*/
Grob*
Stem::first_head (Grob*me)
{
- return extremal_heads (me)[-get_direction (me)];
+ Direction d = get_direction (me);
+ if (!d)
+ return 0;
+ return extremal_heads (me)[-d];
+}
+
+/*
+ The note head opposite to the first head.
+ */
+Grob*
+Stem::last_head (Grob*me)
+{
+ Direction d = get_direction (me);
+ if (!d)
+ return 0;
+ return extremal_heads (me)[d];
}
/*
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))
+ for (SCM s = me->get_grob_property ("note-heads"); gh_pair_p (s); s = ly_cdr (s))
{
Grob * n = unsmob_grob (ly_car (s));
- int p = int (Staff_symbol_referencer::position_f (n));
+ int p = int (Staff_symbol_referencer::get_position (n));
Direction d = LEFT;
do {
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))
+ for (SCM s = me->get_grob_property ("note-heads"); gh_pair_p (s); s = ly_cdr (s))
{
Grob * n = unsmob_grob (ly_car (s));
- int p = int (Staff_symbol_referencer::position_f (n));
+ int p = int (Staff_symbol_referencer::get_position (n));
ps.push (p);
}
if (Note_head::has_interface (n))
{
- Pointer_group_interface::add_grob (me, ly_symbol2scm ("heads"), n);
- }
- else
- {
- /*
- Apparently, this is never used.
- */
-#if 0
- me->set_grob_property ("rest", n->self_scm ());
-#endif
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-heads"), n);
}
}
bool
Stem::invisible_b (Grob*me)
{
- return ! (heads_i (me) && Rhythmic_head::balltype_i (support_head (me)) >= 1);
-}
-
-int
-Stem::get_center_distance (Grob*me, Direction d)
-{
- int staff_center = 0;
- int distance = (int) (d* (head_positions (me)[d] - staff_center));
- return distance >? 0;
+ return ! (head_count (me)
+ && gh_scm2int (me->get_grob_property ("duration-log")) >= 1);
}
Direction
Stem::get_default_dir (Grob*me)
{
- int du = get_center_distance (me,UP);
- int dd = get_center_distance (me,DOWN);
-
- if (sign (dd - du))
- return Direction (sign (dd -du));
+ int staff_center = 0;
+ Interval hp = head_positions (me);
+ if (hp.empty_b())
+ {
+ return CENTER;
+ }
+
+ int udistance = (int) (UP * hp[UP] - staff_center);
+ int ddistance = (int) (DOWN* hp[DOWN] - staff_center);
+
+ if (sign (ddistance - udistance))
+ return Direction (sign (ddistance -udistance));
return to_dir (me->get_grob_property ("neutral-direction"));
}
Real
Stem::get_default_stem_end_position (Grob*me)
{
+ /* Tab notation feature: make stem end extend out of staff. */
+ SCM up_to_staff = me->get_grob_property ("up-to-staff");
+ if (to_boolean (up_to_staff))
+ {
+ int line_count = Staff_symbol_referencer::line_count (me);
+ Direction dir = get_direction (me);
+ return dir * (line_count + 3.5);
+ }
+
bool grace_b = to_boolean (me->get_grob_property ("grace"));
SCM s;
Array<Real> a;
- Real length_f = 0.;
+ Real length_f = 3.5;
SCM scm_len = me->get_grob_property ("length");
if (gh_number_p (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;
+ if (gh_pair_p (s))
+ {
+ length_f = 2* gh_scm2double (robust_list_ref (duration_log(me) -2, s));
+ }
}
-
- 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)));
-
-
- // stem uses half-spaces
-
- // fixme: use scm_list_n_ref () iso. array[]
- Real shorten_f = a[ ((flag_i (me) - 2) >? 0) <? (a.size () - 1)] * 2;
+ Real shorten_f = 0.0;
+
+ SCM sshorten = me->get_grob_property ("stem-shorten");
+ if (gh_pair_p (sshorten))
+ {
+ shorten_f = 2* gh_scm2double (robust_list_ref ((duration_log (me) - 2) >? 0, sshorten));
+ }
/* On boundary: shorten only half */
- if (abs (chord_start_f (me)) == 0.5)
+ if (abs (chord_start_y (me)) == 0.5)
shorten_f *= 0.5;
/* URGURGURG
/* stems in unnatural (forced) direction should be shortened,
according to [Roush & Gourlay] */
- if (chord_start_f (me)
+ if (chord_start_y (me)
&& (get_direction (me) != get_default_dir (me)))
length_f -= shorten_f;
Real st = hp[dir] + dir * length_f;
-
-
/*
- Make a little room if we have a flag and there is a dot.
-
- TODO:
+ TODO: change name to extend-stems to staff/center/'()
+ */
+ 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;
- maybe we should consider moving the dot to the right?
+ /*
+ 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 (!beam_l (me)
- && flag_i (me))
+ if (!get_beam (me) && dir == UP
+ && duration_log (me) > 2)
{
Grob * closest_to_flag = extremal_heads (me)[dir];
Grob * dots = closest_to_flag
- ? Rhythmic_head::dots_l (closest_to_flag ) : 0;
+ ? Rhythmic_head::get_dots (closest_to_flag ) : 0;
if (dots)
{
- Real dp = Staff_symbol_referencer::position_f (dots);
- Real flagy = flag (me).extent (Y_AXIS)[-dir] * 2; // should divide by staffspace
+ Real dp = Staff_symbol_referencer::get_position (dots);
+ Real flagy = flag (me).extent (Y_AXIS)[-dir] * 2
+ / Staff_symbol_referencer::staff_space (me);
/*
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. */
+ {
+ 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.
+ */
+ }
+ }
}
}
- 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;
-
return st;
}
/*
- 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;
void
Stem::position_noteheads (Grob*me)
{
- if (!heads_i (me))
+ if (!head_count (me))
return;
Link_array<Grob> heads =
- Pointer_group_interface__extract_grobs (me, (Grob*)0, "heads");
+ Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-heads");
heads.sort (compare_position);
Direction dir =get_direction (me);
heads.reverse ();
+ bool invisible = invisible_b (me);
+ Real thick = 0.0;
+ if (invisible)
+ thick = gh_scm2double (me->get_grob_property ("thickness"))
+ * me->get_paper ()->get_var ("linethickness");
+
+
Grob *hed = support_head (me);
Real w = Note_head::head_extent (hed,X_AXIS)[dir];
for (int i=0; i < heads.size (); i++)
}
bool parity= true; // todo: make me settable.
- int lastpos = int (Staff_symbol_referencer::position_f (heads[0]));
+ int lastpos = int (Staff_symbol_referencer::get_position (heads[0]));
for (int i=1; i < heads.size (); i ++)
{
- Real p = Staff_symbol_referencer::position_f (heads[i]);
+ Real p = Staff_symbol_referencer::get_position (heads[i]);
int dy =abs (lastpos- (int)p);
if (dy <= 1)
{
Real l = Note_head::head_extent (heads[i], X_AXIS).length ();
- heads[i]->translate_axis (l * get_direction (me), X_AXIS);
+ Direction d = get_direction (me);
+ heads[i]->translate_axis (l * d, X_AXIS);
+
+ if (invisible_b(me))
+ heads[i]->translate_axis (-thick *2* 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;
}
Stem::before_line_breaking (SCM smob)
{
Grob*me = unsmob_grob (smob);
- stem_end_position (me); // ugh. Trigger direction calc.
- position_noteheads (me);
- if (invisible_b (me))
+
+ /*
+ Do the calculations for visible stems, but also for invisible stems
+ with note heads (i.e. half notes.)
+ */
+ if (head_count (me))
+ {
+ stem_end_position (me); // ugh. Trigger direction calc.
+ position_noteheads (me);
+ }
+ else
{
- me->remove_grob_property ("molecule-callback");
- // suicide ();
+ me->set_grob_property ("molecule-callback", SCM_EOL);
}
return SCM_UNSPECIFIED;
Interval iv;
if (mol != SCM_EOL)
iv = unsmob_molecule (mol)->extent (a);
+ if (Grob *b =get_beam (me))
+ {
+ Direction d = get_direction (me);
+ iv[d] += d * Beam::get_thickness (b) /2.0 ;
+ }
+
return ly_interval2scm (iv);
}
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);
- }
+ String style, staffline_offs;
- SCM st = me->get_grob_property ("style");
- if (gh_symbol_p (st))
+ SCM style_scm = me->get_grob_property ("style");
+ if (gh_symbol_p (style_scm))
{
- style = (ly_scm2string (scm_symbol_to_string (st)));
+ style = (ly_scm2string (scm_symbol_to_string (style_scm)));
}
else
{
}
bool adjust = to_boolean (me->get_grob_property ("adjust-if-on-staffline"));
- if (String::compare_i (style, "mensural") == 0)
+ if (String::compare (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,
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";
+
+ /*
+ perhaps the detection whether this correction is needed should
+ happen in a different place to avoid the recursion.
+
+ --hwn.
+ */
+ int p = (int)rint (Staff_symbol_referencer::get_position (first_head (me)));
+ staffline_offs = Staff_symbol_referencer::on_staffline (me, p) ?
+ "1" : "0";
}
else
{
{
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;
+ char dir = (get_direction (me) == UP) ? 'u' : 'd';
+ String font_char =
+ style + to_string (dir) + staffline_offs + to_string (duration_log (me));
+ Font_metric *fm = Font_interface::get_default_font (me);
+ Molecule flag = fm->find_by_name ("flags-" + font_char);
+ if (flag.empty_b ())
+ {
+ me->warning (_f ("flag `%s' not found", font_char));
+ }
+
+ SCM stroke_scm = me->get_grob_property ("flag-style");
+ if (gh_string_p (stroke_scm))
+ {
+ String stroke = ly_scm2string (stroke_scm);
+ if (!stroke.empty_b ())
+ {
+ String font_char = to_string (dir) + stroke;
+ Molecule stroke = fm->find_by_name ("flags-" + font_char);
+ if (stroke.empty_b ())
+ {
+ me->warning (_f ("flag stroke `%s' not found", font_char));
+ }
+ else
+ {
+ flag.add_molecule (stroke);
+ }
+ }
+ }
+
+ return flag;
}
MAKE_SCHEME_CALLBACK (Stem,dim_callback,2);
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)
+ if (unsmob_grob (se->get_grob_property ("beam")) || abs (duration_log (se)) <= 2)
; // TODO!
else
{
Direction d = get_direction (me);
- Real y1 = Staff_symbol_referencer::position_f (first_head (me));
+
+ Real y1;
+
+ /*
+ This is required to avoid stems passing in tablature chords...
+ */
+
+
+ /*
+ TODO: make the stem start a direction ?
+ */
+
+
+
+ if (to_boolean (me->get_grob_property ("avoid-note-head")))
+ {
+ Grob * lh = last_head (me);
+ if (!lh)
+ return SCM_EOL;
+ y1 = Staff_symbol_referencer::get_position (lh);
+ }
+ else
+ {
+ Grob * lh = first_head (me);
+ if (!lh)
+ return SCM_EOL;
+ y1 = Staff_symbol_referencer::get_position (lh);
+ }
+
Real y2 = stem_end_position (me);
Interval stem_y (y1 <? y2,y2 >? y1);
{
Real stem_width = gh_scm2double (me->get_grob_property ("thickness"))
// URG
- * me->paper_l ()->get_var ("stafflinethickness");
+ * me->get_paper ()->get_var ("linethickness");
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);
}
- if (!beam_l (me) && abs (flag_i (me)) > 2)
+ if (!get_beam (me) && abs (duration_log (me)) > 2)
{
Molecule fl = flag (me);
fl.translate_axis (stem_y[d]*dy, Y_AXIS);
Grob *me = unsmob_grob (element_smob);
Real r=0;
+
+ if (head_count (me) == 0)
+ {
+ return gh_double2scm (0.0);
+ }
+
if (Grob * f = first_head (me))
{
Interval head_wid = Note_head::head_extent(f, X_AXIS);
- Real attach =
- Note_head::stem_attachment_coordinate(f, X_AXIS);
+
+ Real attach =0.0;
+
+ if (invisible_b (me))
+ {
+ attach = 0.0;
+ }
+ else
+ attach = Note_head::stem_attachment_coordinate(f, X_AXIS);
Direction d = get_direction (me);
{
Real rule_thick
= gh_scm2double (me->get_grob_property ("thickness"))
- * me->paper_l ()->get_var ("stafflinethickness");
+ * me->get_paper ()->get_var ("linethickness");
r += - d * rule_thick * 0.5;
return gh_double2scm (r);
}
-
-
Grob*
-Stem::beam_l (Grob*me)
+Stem::get_beam (Grob*me)
{
SCM b= me->get_grob_property ("beam");
return unsmob_grob (b);
}
-
-// ugh still very long.
Stem_info
-Stem::calc_stem_info (Grob*me)
+Stem::get_stem_info (Grob *me)
{
+ /* Return cached info if available */
SCM scm_info = me->get_grob_property ("stem-info");
-
- if (gh_pair_p (scm_info ))
+ if (!gh_pair_p (scm_info))
{
- Stem_info si ;
-
- si.ideal_y = gh_scm2double (gh_car (scm_info));
- si.max_y = gh_scm2double (gh_cadr (scm_info));
- si.min_y = gh_scm2double (gh_caddr (scm_info));
-
- return si;
+ calc_stem_info (me);
+ scm_info = me->get_grob_property ("stem-info");
}
-
- Grob * beam = beam_l (me);
+
+ Stem_info si;
+ si.dir_ = Directional_element_interface::get (me);
+ si.ideal_y_ = gh_scm2double (gh_car (scm_info));
+ si.shortest_y_ = gh_scm2double (gh_cadr (scm_info));
+ return si;
+}
- Direction beam_dir = Directional_element_interface::get (beam);
- if (!beam_dir)
+void
+Stem::calc_stem_info (Grob *me)
+{
+ /* Tab notation feature: make stem end extend out of staff. */
+ SCM up_to_staff = me->get_grob_property ("up-to-staff");
+ if (to_boolean (up_to_staff))
{
- programming_error ("Beam dir not set.");
- beam_dir = UP;
+ int line_count = Staff_symbol_referencer::line_count (me);
+ Direction dir = get_direction (me);
+ Real ideal_y = dir * (line_count + 1.5);
+ Real shortest_y = ideal_y;
+
+ me->set_grob_property ("stem-info",
+ scm_list_n (gh_double2scm (ideal_y),
+ gh_double2scm (shortest_y),
+ SCM_UNDEFINED));
+ return;
}
-
+ Direction my_dir = Directional_element_interface::get (me);
Real staff_space = Staff_symbol_referencer::staff_space (me);
- Real half_space = staff_space / 2;
-
- int multiplicity = Beam::get_multiplicity (beam);
- Real interbeam_f = Beam::get_interbeam (beam);
+ Grob *beam = get_beam (me);
+ Real beam_translation = Beam::get_beam_translation (beam);
+ Real beam_thickness = gh_scm2double (beam->get_grob_property ("thickness"));
+ int beam_count = Beam::get_direction_beam_count (beam, my_dir);
- Real thick = gh_scm2double (beam->get_grob_property ("thickness"));
- Stem_info info;
- info.ideal_y = chord_start_f (me);
- // for simplicity, we calculate as if dir == UP
- info.ideal_y *= beam_dir;
- SCM grace_prop = me->get_grob_property ("grace");
+ /* Simple standard stem length */
+ Real ideal_length =
+ gh_scm2double (robust_list_ref
+ (beam_count - 1,
+ me->get_grob_property ("beamed-lengths")))
+ * staff_space
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
- bool grace_b = to_boolean (grace_prop);
- Array<Real> a;
- SCM s;
+ /* Condition: sane minimum free stem length (chord to beams) */
+ Real ideal_minimum_free =
+ gh_scm2double (robust_list_ref
+ (beam_count - 1,
+ me->get_grob_property ("beamed-minimum-free-lengths")))
+ * staff_space;
- 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] }}
+
+ must be horizontal. */
+ Real height_of_my_beams = beam_thickness
+ + (beam_count - 1) * beam_translation;
- Real minimum_length = a[multiplicity <? (a.size () - 1)] * staff_space;
- s = me->get_grob_property ("beamed-lengths");
+ Real ideal_minimum_length = ideal_minimum_free
+ + height_of_my_beams
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
- a.clear ();
- for (SCM q = s; q != SCM_EOL; q = ly_cdr (q))
- a.push (gh_scm2double (ly_car (q)));
+ ideal_length = ideal_length >? ideal_minimum_length;
- Real stem_length = a[multiplicity <? (a.size () - 1)] * staff_space;
+
+ /* Convert to Y position, calculate for dir == UP */
+ Real note_start =
+ /* staff positions */
+ head_positions (me)[my_dir] * 0.5
+ * my_dir;
+ Real ideal_y = note_start + ideal_length;
- if (!beam_dir || (beam_dir == Directional_element_interface::get (me)))
- /* normal beamed stem */
- {
- if (multiplicity)
- {
- info.ideal_y += thick + (multiplicity - 1) * interbeam_f;
- }
- info.min_y = info.ideal_y;
- info.max_y = 1000; // INT_MAX;
- info.ideal_y += stem_length;
- info.min_y += 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
+
+ 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.
- 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.min_y =
- info.min_y >? 0
- >? (- 2 * half_space - thick
- + (multiplicity > 0) * thick
- + interbeam_f * (multiplicity - 1));
- }
- }
- else
- /* knee */
+ Obviously not for grace beams.
+
+ Also, not for knees. Seems to be a good thing. */
+ SCM grace = me->get_grob_property ("grace");
+ bool grace_b = to_boolean (grace);
+ bool no_extend_b = to_boolean (me->get_grob_property ("no-stem-extend"));
+ bool knee_b = to_boolean (beam->get_grob_property ("knee"));
+ if (!grace_b && !no_extend_b && !knee_b)
{
- info.ideal_y -= thick;
- info.max_y = info.ideal_y;
- info.min_y = - 1000 ; // INT_MAX;
-
- info.ideal_y -= stem_length;
- info.max_y -= minimum_length;
+ /* Highest beam of (UP) beam must never be lower than middle
+ staffline */
+ ideal_y = ideal_y >? 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);
}
-
- info.ideal_y = (info.max_y <? info.ideal_y) >? info.min_y;
- s = beam->get_grob_property ("shorten");
- if (gh_number_p (s))
- info.ideal_y -= gh_scm2double (s);
- 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));
-
- info.ideal_y += interstaff_f;
- info.min_y += interstaff_f;
- info.max_y += interstaff_f ;
+ SCM shorten = beam->get_grob_property ("shorten");
+ if (gh_number_p (shorten))
+ ideal_y -= gh_scm2double (shorten);
+
+ Real minimum_free =
+ gh_scm2double (robust_list_ref
+ (beam_count - 1,
+ me->get_grob_property
+ ("beamed-extreme-minimum-free-lengths")))
+ * staff_space;
+
+ Real minimum_length = minimum_free
+ + height_of_my_beams
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
+
+ Real minimum_y = note_start + minimum_length;
+
+
+ ideal_y *= my_dir;
+ Real shortest_y = minimum_y * my_dir;
+
me->set_grob_property ("stem-info",
- scm_list_n (gh_double2scm (info.ideal_y),
- gh_double2scm (info.max_y),
- gh_double2scm (info.min_y),
+ scm_list_n (gh_double2scm (ideal_y),
+ gh_double2scm (shortest_y),
SCM_UNDEFINED));
-
- return info;
}
-bool
-Stem::has_interface (Grob*m)
+Slice
+Stem::beam_multiplicity (Grob *stem)
{
- return m && m->has_interface (ly_symbol2scm ("stem-interface"));
+ SCM beaming= stem->get_grob_property ("beaming");
+ Slice l = int_list_to_slice (gh_car (beaming));
+ Slice r = int_list_to_slice (gh_cdr (beaming));
+ l.unite (r);
+
+ return l;
}
+
ADD_INTERFACE (Stem,"stem-interface",
"A stem",
- "thickness stem-info beamed-lengths beamed-minimum-lengths lengths beam stem-shorten duration-log beaming neutral-direction stem-end-position support-head heads direction length style no-stem-extend flag-style dir-forced");
+ "up-to-staff avoid-note-head adjust-if-on-staffline 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 support-head note-heads direction length style no-stem-extend flag-style");
+