source file of the GNU LilyPond music typesetter
- (c) 1996--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1996--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
TODO: This is way too hairy
#include "paper-def.hh"
#include "rhythmic-head.hh"
#include "font-interface.hh"
-#include "molecule.hh"
+#include "stencil.hh"
#include "paper-column.hh"
#include "misc.hh"
#include "beam.hh"
#include "spanner.hh"
#include "side-position-interface.hh"
#include "dot-column.hh"
+#include "stem-tremolo.hh"
void
Stem::set_beaming (Grob*me, int beam_count, Direction d)
{
- SCM pair = me->get_grob_property ("beaming");
+ SCM pair = me->get_property ("beaming");
- if (!gh_pair_p (pair))
+ if (!ly_c_pair_p (pair))
{
- pair = gh_cons (SCM_EOL, SCM_EOL);
- me->set_grob_property ("beaming", pair);
+ pair = scm_cons (SCM_EOL, SCM_EOL);
+ me->set_property ("beaming", pair);
}
SCM l = index_get_cell (pair, d);
- for( int i = 0; i< beam_count; i++)
+ for (int i = 0; i< beam_count; i++)
{
- l = gh_cons (gh_int2scm (i), l);
+ l = scm_cons (scm_int2num (i), l);
}
index_set_cell (pair, d, l);
}
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::stem_end_position (Grob*me)
{
- SCM p =me->get_grob_property ("stem-end-position");
+ SCM p =me->get_property ("stem-end-position");
Real pos;
- if (!gh_number_p (p))
+ if (!ly_c_number_p (p))
{
pos = get_default_stem_end_position (me);
- me->set_grob_property ("stem-end-position", gh_double2scm (pos));
+ me->set_property ("stem-end-position", scm_make_real (pos));
}
else
- pos = gh_scm2double (p);
+ pos = ly_scm2double (p);
return pos;
}
Direction
Stem::get_direction (Grob*me)
{
- Direction d = Directional_element_interface::get (me);
+ Direction d = get_grob_direction (me);
if (!d)
{
d = get_default_dir (me);
// urg, AAARGH!
- Directional_element_interface::set (me, d);
+ set_grob_direction (me, d);
}
return d ;
}
if (d && d * head_positions (me)[get_direction (me)] >= se*d)
me->warning (_ ("Weird stem size; check for narrow beams"));
- me->set_grob_property ("stem-end-position", gh_double2scm (se));
+ me->set_property ("stem-end-position", scm_make_real (se));
}
/*
Note head that determines hshift for upstems
- */
+
+ WARNING: triggers direction
+*/
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 (head_count (me) == 1)
+ if (head_count (me) == 1)
{
/*
UGH.
*/
- return unsmob_grob (ly_car (me->get_grob_property ("note-heads")));
+ return unsmob_grob (ly_car (me->get_property ("note-heads")));
}
else
return first_head (me);
/*
The note head which forms one end of the stem.
- */
+
+ WARNING: triggers direction
+*/
Grob*
Stem::first_head (Grob*me)
{
Drul_array<Grob *> exthead;
exthead[LEFT] = exthead[RIGHT] =0;
- for (SCM s = me->get_grob_property ("note-heads"); gh_pair_p (s); s = ly_cdr (s))
+ for (SCM s = me->get_property ("note-heads"); ly_c_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 = Staff_symbol_referencer::get_rounded_position (n);
Direction d = LEFT;
do {
return a-b;
}
+/*
+ The positions, in ascending order.
+ */
Array<int>
Stem::note_head_positions (Grob *me)
{
Array<int> ps ;
- for (SCM s = me->get_grob_property ("note-heads"); gh_pair_p (s); s = ly_cdr (s))
+ for (SCM s = me->get_property ("note-heads"); ly_c_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 = Staff_symbol_referencer::get_rounded_position (n);
ps.push (p);
}
-
+
ps.sort (icmp);
return ps;
}
void
Stem::add_head (Grob*me, Grob *n)
{
- n->set_grob_property ("stem", me->self_scm ());
+ n->set_property ("stem", me->self_scm ());
n->add_dependency (me);
+ /*
+ TODO: why not store Rest pointers?
+ */
if (Note_head::has_interface (n))
{
Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-heads"), n);
}
bool
-Stem::invisible_b (Grob*me)
+Stem::is_invisible (Grob*me)
{
- return ! (head_count (me) && Note_head::balltype_i (support_head (me)) >= 1);
+ return ! (head_count (me)
+ && ly_scm2int (me->get_property ("duration-log")) >= 1);
}
Direction
{
int staff_center = 0;
Interval hp = head_positions (me);
- if (hp.empty_b())
+ if (hp.is_empty ())
{
return CENTER;
}
if (sign (ddistance - udistance))
return Direction (sign (ddistance -udistance));
- return to_dir (me->get_grob_property ("neutral-direction"));
+ return to_dir (me->get_property ("neutral-direction"));
}
Real
Stem::get_default_stem_end_position (Grob*me)
{
- 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);
+ Real ss = Staff_symbol_referencer::staff_space (me);
+
+ int durlog = duration_log (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.;
- SCM scm_len = me->get_grob_property ("length");
- if (gh_number_p (scm_len))
+
+ Real length = 7; // WARNING: IN HALF SPACES
+ SCM scm_len = me->get_property ("length");
+ if (ly_c_number_p (scm_len))
{
- length_f = gh_scm2double (scm_len);
+ length = ly_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[ ((duration_log (me) - 2) >? 0) <? (a.size () - 1)] * 2;
+ s = me->get_property ("lengths");
+ if (ly_c_pair_p (s))
+ {
+ length = 2* ly_scm2double (robust_list_ref (durlog -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[ ((duration_log (me) - 2) >? 0) <? (a.size () - 1)] * 2;
-
- /* On boundary: shorten only half */
- if (abs (chord_start_y (me)) == 0.5)
- shorten_f *= 0.5;
-
/* URGURGURG
'set-default-stemlen' sets direction too
*/
if (!dir)
{
dir = get_default_dir (me);
- Directional_element_interface::set (me, dir);
+ set_grob_direction (me, dir);
}
-
+
/* stems in unnatural (forced) direction should be shortened,
according to [Roush & Gourlay] */
- if (chord_start_y (me)
- && (get_direction (me) != get_default_dir (me)))
- length_f -= shorten_f;
+ if (dir * head_positions (me)[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;
+
+ length -= shorten;
+ }
+
+ /*
+ Tremolo stuff:
+ */
+ Grob * trem = unsmob_grob (me->get_property ("tremolo-flag"));
+ if (trem && !unsmob_grob (me->get_property ("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::raw_stencil (trem).extent (Y_AXIS).length () / ss;
+
+ 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);
+ }
+
Interval hp = head_positions (me);
- Real st = hp[dir] + dir * length_f;
+ Real st = hp[dir] + dir * length;
- bool no_extend_b = to_boolean (me->get_grob_property ("no-stem-extend"));
- if (!grace_b && !no_extend_b && dir * st < 0) // junkme?
+ /*
+ 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) // junkme?
st = 0.0;
/*
good typesetting practice.
*/
- if (!beam_l (me) && dir == UP
- && duration_log (me) > 2)
+ if (!get_beam (me) && dir == UP
+ && durlog > 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 dp = Staff_symbol_referencer::get_position (dots);
Real flagy = flag (me).extent (Y_AXIS)[-dir] * 2
- / Staff_symbol_referencer::staff_space (me);
+ / ss;
/*
Very gory: add myself to the X-support of the parent,
int
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 (ly_c_number_p (s)) ? ly_scm2int (s) : 2;
}
void
heads.reverse ();
- bool invisible = invisible_b (me);
- Real thick = 0.0;
- if (invisible)
- thick = gh_scm2double (me->get_grob_property ("thickness"))
- * me->paper_l ()->get_var ("linethickness");
+ 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++)
X_AXIS);
}
- bool parity= true; // todo: make me settable.
- int lastpos = int (Staff_symbol_referencer::position_f (heads[0]));
+ bool parity= true;
+ Real lastpos = Real (Staff_symbol_referencer::get_position (heads[0]));
for (int 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 = Note_head::head_extent (heads[i], X_AXIS).length ();
Direction d = get_direction (me);
- heads[i]->translate_axis (l * d, X_AXIS);
+ /*
+ Reversed head should be shifted l-thickness, but this
+ looks too crowded, so we only shift l-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 ((l-thick*reverse_overlap) * d, X_AXIS);
- if (invisible_b(me))
- heads[i]->translate_axis (-thick *2* d , X_AXIS);
+ if (is_invisible (me))
+ heads[i]->translate_axis (-thick*(2 - reverse_overlap) * d , X_AXIS);
/* TODO:
}
else
{
- me->remove_grob_property ("molecule-callback");
+ me->set_property ("print-function", SCM_EOL);
}
return SCM_UNSPECIFIED;
SCM
Stem::height (SCM smob, SCM ax)
{
- Axis a = (Axis)gh_scm2int (ax);
+ Axis a = (Axis)ly_scm2int (ax);
Grob * me = unsmob_grob (smob);
assert (a == Y_AXIS);
- SCM mol = me->get_uncached_molecule ();
+ SCM mol = me->get_uncached_stencil ();
Interval iv;
if (mol != SCM_EOL)
- iv = unsmob_molecule (mol)->extent (a);
+ iv = unsmob_stencil (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);
}
-Molecule
+Stencil
Stem::flag (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))
+ /* 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 (ly_c_symbol_p (flag_style_scm))
{
- fstyle = ly_scm2string (fst);
+ flag_style = ly_symbol2string (flag_style_scm);
}
- SCM st = me->get_grob_property ("style");
- if (gh_symbol_p (st))
- {
- style = (ly_scm2string (scm_symbol_to_string (st)));
- }
- else
+ if (flag_style == "no-flag")
{
- style = "";
+ return Stencil ();
}
- bool adjust = to_boolean (me->get_grob_property ("adjust-if-on-staffline"));
- if (String::compare_i (style, "mensural") == 0)
+ 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,
{
/* 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),
+ 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,
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). */
+ note heads to a single stem in mensural notation).
+ */
/*
perhaps the detection whether this correction is needed should
--hwn.
*/
- 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";
+ int p = Staff_symbol_referencer::get_rounded_position (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 (duration_log (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 =
+ 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));
+ }
+
+ SCM stroke_style_scm = me->get_property ("stroke-style");
+ if (ly_c_string_p (stroke_style_scm))
+ {
+ 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);
+ }
+ }
+ }
+
+ return flag;
}
MAKE_SCHEME_CALLBACK (Stem,dim_callback,2);
SCM
Stem::dim_callback (SCM e, SCM ax)
{
- Axis a = (Axis) gh_scm2int (ax);
+ Axis a = (Axis) ly_scm2int (ax);
assert (a == X_AXIS);
- Grob *se = unsmob_grob (e);
+ Grob *me = unsmob_grob (e);
Interval r (0, 0);
- if (unsmob_grob (se->get_grob_property ("beam")) || abs (duration_log (se)) <= 2)
+ if (unsmob_grob (me->get_property ("beam")) || abs (duration_log (me)) <= 2)
; // TODO!
else
{
- r = flag (se).extent (X_AXIS);
+ r = flag (me).extent (X_AXIS)
+ + thickness (me)/2;
}
return ly_interval2scm (r);
}
+Real
+Stem::thickness (Grob* me)
+{
+ return ly_scm2double (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;
+ Stencil mol;
Direction d = get_direction (me);
-
-
- Real y1;
-
/*
- This is required to avoid stems passing in tablature chords...
- */
-
+ TODO: make the stem start a direction ?
- /*
- 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 (!lh)
+ return SCM_EOL;
+
+ if (is_invisible (me))
+ return SCM_EOL;
- if (to_boolean (me->get_grob_property ("avoid-note-head")))
- {
- Grob * lh = last_head (me);
- if (!lh)
- return SCM_EOL;
- y1 = Staff_symbol_referencer::position_f (lh);
- }
- else
- {
- Grob * lh = first_head (me);
- if (!lh)
- return SCM_EOL;
- y1 = Staff_symbol_referencer::position_f (lh);
- }
-
+ Real y1 = Staff_symbol_referencer::get_position (lh);
Real y2 = stem_end_position (me);
Interval stem_y (y1 <? y2,y2 >? y1);
-
+
// dy?
Real dy = Staff_symbol_referencer::staff_space (me) * 0.5;
must not take ledgers into account.
*/
Interval head_height = Note_head::head_extent (hed,Y_AXIS);
- Real y_attach = Note_head::stem_attachment_coordinate ( hed, Y_AXIS);
+ Real y_attach = Note_head::stem_attachment_coordinate (hed, Y_AXIS);
y_attach = head_height.linear_combination (y_attach);
stem_y[Direction (-d)] += d * y_attach/dy;
}
+
- if (!invisible_b (me))
- {
- Real stem_width = gh_scm2double (me->get_grob_property ("thickness"))
- // URG
- * me->paper_l ()->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);
- }
+ // URG
+ Real stem_width = thickness (me);
+ Real blot =
+ me->get_paper ()->get_dimension (ly_symbol2scm ("blotdiameter"));
+
+ Box b = Box (Interval (-stem_width/2, stem_width/2),
+ Interval (stem_y[DOWN]*dy, stem_y[UP]*dy));
- if (!beam_l (me) && abs (duration_log (me)) > 2)
+ Stencil ss = Lookup::round_filled_box (b, blot);
+ mol.add_stencil (ss);
+
+ if (!get_beam (me) && abs (duration_log (me)) > 2)
{
- Molecule fl = flag (me);
- fl.translate_axis (stem_y[d]*dy, Y_AXIS);
- mol.add_molecule (fl);
+ 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 ();
if (head_count (me) == 0)
{
- return gh_double2scm (0.0);
+ return scm_make_real (0.0);
}
if (Grob * f = first_head (me))
{
- Interval head_wid = Note_head::head_extent(f, X_AXIS);
-
+ Interval head_wid = Note_head::head_extent (f, X_AXIS);
Real attach =0.0;
- if (invisible_b (me))
+ if (is_invisible (me))
{
attach = 0.0;
}
else
- attach = Note_head::stem_attachment_coordinate(f, X_AXIS);
+ attach = Note_head::stem_attachment_coordinate (f, X_AXIS);
Direction d = get_direction (me);
if (attach)
{
Real rule_thick
- = gh_scm2double (me->get_grob_property ("thickness"))
- * me->paper_l ()->get_var ("linethickness");
-
+ = thickness (me);
r += - d * rule_thick * 0.5;
}
}
- return gh_double2scm (r);
+ return scm_make_real (r);
}
-
Grob*
-Stem::beam_l (Grob*me)
+Stem::get_beam (Grob*me)
{
- SCM b= me->get_grob_property ("beam");
+ SCM b= me->get_property ("beam");
return unsmob_grob (b);
}
-
-// ugh still very long.
Stem_info
-Stem::calc_stem_info (Grob*me)
+Stem::get_stem_info (Grob *me)
{
- SCM up_to_staff = me->get_grob_property ("up-to-staff");
- if (gh_scm2bool(up_to_staff)) {
-
- // Up-to-staff : the stem end out of the staff.
-
- /*
- FIXME: duplicate code.
- */
- int line_count = Staff_symbol_referencer::line_count (me);
-
- Stem_info si ;
-
- Direction dir = get_direction (me);
-
- si.ideal_y_ = dir* (line_count + 1.5);
- si.dir_ = dir;
- si.shortest_y_ = si.ideal_y_;
-
- return si;
- }
+ /* 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");
+ }
- SCM scm_info = me->get_grob_property ("stem-info");
+ Stem_info si;
+ si.dir_ = get_grob_direction (me);
+ si.ideal_y_ = ly_scm2double (ly_car (scm_info));
+ si.shortest_y_ = ly_scm2double (ly_cadr (scm_info));
+ return si;
+}
- if (gh_pair_p (scm_info ))
- {
- 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));
+/*
+ TODO: add extra space for tremolos!
+ */
+void
+Stem::calc_stem_info (Grob *me)
+{
+ Direction my_dir = get_grob_direction (me);
- return si;
+ if (!my_dir)
+ {
+ programming_error ("No stem dir set?");
+ my_dir = UP;
}
-
- Direction mydir = Directional_element_interface::get (me);
+
Real staff_space = Staff_symbol_referencer::staff_space (me);
- Real half_space = staff_space / 2;
+ Grob *beam = get_beam (me);
+ Real beam_translation = Beam::get_beam_translation (beam);
+ Real beam_thickness = Beam::get_thickness (beam);
+ int beam_count = Beam::get_direction_beam_count (beam, my_dir);
- Grob * beam = beam_l (me);
- int beam_count = Beam::get_beam_count (beam);
- Real beam_space_f = Beam::get_beam_space (beam);
- Real thick = gh_scm2double (beam->get_grob_property ("thickness"));
-
- Real ideal_y = chord_start_y (me);
-
- /* from here on, calculate as if dir == UP */
- ideal_y *= mydir;
-
- SCM grace_prop = me->get_grob_property ("grace");
+ /* Simple standard stem length */
+ SCM lengths = me->get_property ("beamed-lengths");
+ Real ideal_length =
+ ly_scm2double (robust_list_ref (beam_count - 1,lengths))
+
+ * staff_space
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
- bool grace_b = to_boolean (grace_prop);
+ /* Condition: sane minimum free stem length (chord to beams) */
+ lengths = me->get_property ("beamed-minimum-free-lengths");
+ Real ideal_minimum_free =
+ ly_scm2double (robust_list_ref (beam_count - 1, lengths))
+ * staff_space;
- 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)));
-
-
- Real minimum_length = a[beam_count <? (a.size () - 1)] * staff_space;
- s = me->get_grob_property ("beamed-lengths");
- a.clear ();
- for (SCM q = s; q != SCM_EOL; q = ly_cdr (q))
- a.push (gh_scm2double (ly_car (q)));
-
- Real stem_length = a[beam_count <? (a.size () - 1)] * staff_space;
+ /* 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;
- Grob *fvs = Beam::first_visible_stem (beam);
+ Real ideal_minimum_length = ideal_minimum_free
+ + height_of_my_beams
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
- /*
- Let's hope people don't use kneed tremolo beams.
- */
- Direction first_dir = fvs ? Directional_element_interface::get(fvs) : mydir;
+ ideal_length = ideal_length >? ideal_minimum_length;
- // FIXME, hairy. see beam::calc_stem_y, for knees it's not trival
- // to calculate where secondary, ternary beams will go.
- if (beam_count && first_dir == mydir)
- ideal_y += thick + (beam_count - 1) * beam_space_f;
+
+ /* 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;
- ideal_y += stem_length;
-
- Real shortest_y = ideal_y -stem_length + 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)
+ 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)
{
- /* highest beam of (UP) beam must never be lower than middle
- staffline
- lowest beam of (UP) beam must never be lower than second staffline
- */
- shortest_y =
- shortest_y >? 0
- >? (- 2 * half_space - thick
- + (beam_count > 0) * thick
- + beam_space_f * (beam_count - 1));
+ /* 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);
}
-
-
- ideal_y = ideal_y >? shortest_y;
- s = beam->get_grob_property ("shorten");
- if (gh_number_p (s))
- ideal_y -= gh_scm2double (s);
-#if 0
- Grob *common = me->common_refpoint (beam, Y_AXIS);
+ ideal_y -= robust_scm2double (beam->get_property ("shorten"), 0);
- /*
- UGH -> THIS CAUSES ASYMETRY: the same beam can start/end on
- different staffs.
+ Real minimum_free =
+ ly_scm2double (robust_list_ref
+ (beam_count - 1,
+ me->get_property
+ ("beamed-extreme-minimum-free-lengths")))
+ * staff_space;
- TODO: the beam calculation should probably also use
- relative_coordinate() for the Y positions of all beams.
+ Real minimum_length = minimum_free
+ + height_of_my_beams
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
-
- */
- Real interstaff_f = mydir *
- (me->relative_coordinate (common, Y_AXIS)
- - beam->relative_coordinate (common, Y_AXIS));
+ Real minimum_y = note_start + minimum_length;
- ideal_y += interstaff_f;
- shortest_y += interstaff_f;
-#endif
- ideal_y *= mydir;
- shortest_y *= mydir;
+ ideal_y *= my_dir;
+ Real shortest_y = minimum_y * my_dir;
- me->set_grob_property ("stem-info",
- scm_list_n (gh_double2scm (ideal_y),
- gh_double2scm (shortest_y),
+ me->set_property ("stem-info",
+ scm_list_n (scm_make_real (ideal_y),
+ scm_make_real (shortest_y),
SCM_UNDEFINED));
-
- Stem_info si;
- si.dir_ = mydir;
- si.shortest_y_ = shortest_y;
- si.ideal_y_ = ideal_y;
-
- return si;
}
-
-// move to stem?
Slice
Stem::beam_multiplicity (Grob *stem)
{
- 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));
+ SCM beaming= stem->get_property ("beaming");
+ Slice l = int_list_to_slice (ly_car (beaming));
+ Slice r = int_list_to_slice (ly_cdr (beaming));
l.unite (r);
return l;
}
+/*
+ these are too many props.
+ */
ADD_INTERFACE (Stem,"stem-interface",
- "A stem",
- "up-to-staff avoid-note-head adjust-if-on-staffline thickness stem-info beamed-lengths beamed-minimum-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 dir-forced");
+ "The stem represent the graphical stem. "
+ " In addition, it internally connects note heads, beams, 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");
+
+/****************************************************************/
+
+Stem_info::Stem_info ()
+{
+ ideal_y_ = shortest_y_ =0;
+ dir_ = CENTER;
+}
+
+void
+Stem_info::scale (Real x)
+{
+ ideal_y_ *= x;
+ shortest_y_ *= x;
+}