source file of the GNU LilyPond music typesetter
- (c) 1996, 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
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 "directional-element-interface.hh"
-#include "dimension-cache.hh"
#include "stem.hh"
-#include "debug.hh"
-#include "paper-def.hh"
-#include "note-head.hh"
+
+#include <math.h> // rint
+
#include "lookup.hh"
-#include "molecule.hh"
+#include "directional-element-interface.hh"
+#include "note-head.hh"
+#include "warn.hh"
+#include "output-def.hh"
+#include "rhythmic-head.hh"
+#include "font-interface.hh"
#include "paper-column.hh"
#include "misc.hh"
#include "beam.hh"
#include "rest.hh"
#include "group-interface.hh"
-#include "cross-staff.hh"
#include "staff-symbol-referencer.hh"
-#include "lily-guile.icc"
-
+#include "side-position-interface.hh"
+#include "dot-column.hh"
+#include "stem-tremolo.hh"
void
-Stem::set_beaming (int i, Direction d )
+Stem::set_beaming (Grob *me, int beam_count, Direction d)
{
- SCM pair = get_elt_property ("beaming");
-
- if (!gh_pair_p (pair))
+ SCM pair = me->get_property ("beaming");
+
+ if (!scm_is_pair (pair))
{
- pair = gh_cons (gh_int2scm (0),gh_int2scm (0));
- set_elt_property ("beaming", pair);
+ pair = scm_cons (SCM_EOL, SCM_EOL);
+ me->set_property ("beaming", pair);
}
- index_set_cell (pair, d, gh_int2scm (i));
+
+ SCM lst = index_get_cell (pair, d);
+ for (int i = 0; i < beam_count; i++)
+ lst = scm_cons (scm_int2num (i), lst);
+ index_set_cell (pair, d, lst);
}
int
-Stem::beam_count (Direction d) const
+Stem::get_beaming (Grob *me, Direction d)
{
- SCM p=get_elt_property ("beaming");
- if (gh_pair_p (p))
- return gh_scm2int (index_cell (p,d));
- else
+ SCM pair = me->get_property ("beaming");
+ if (!scm_is_pair (pair))
return 0;
+
+ SCM lst = index_get_cell (pair, d);
+ return scm_ilength (lst);
}
+
Interval
-Stem::head_positions () const
+Stem::head_positions (Grob *me)
{
- if (!heads_i ())
+ if (head_count (me))
{
- Interval iv;
- return iv;
+ Drul_array<Grob*> e (extremal_heads (me));
+ return Interval (Staff_symbol_referencer::get_position (e[DOWN]),
+ Staff_symbol_referencer::get_position (e[UP]));
}
-
-
- Drul_array<Note_head*> e (extremal_heads ());
-
- return Interval (staff_symbol_referencer (e[DOWN]).position_f (),
- staff_symbol_referencer( e[UP]).position_f ());
+ return Interval ();
}
-
Real
-Stem::chord_start_f () const
+Stem::chord_start_y (Grob *me)
{
- return head_positions()[get_direction ()]
- * Staff_symbol_referencer_interface (this).staff_space ()/2.0;
+ Interval hp = head_positions (me);
+ if (!hp.is_empty ())
+ return hp[get_direction (me)] * Staff_symbol_referencer::staff_space (me)
+ * 0.5;
+ return 0;
}
Real
-Stem::stem_end_position () const
+Stem::stem_end_position (Grob *me)
{
- SCM p =get_elt_property ("stem-end-position");
+ SCM p = me->get_property ("stem-end-position");
Real pos;
- if (!gh_number_p (p))
+ if (!scm_is_number (p))
{
- Stem * me = (Stem*) this;
- pos = get_default_stem_end_position ();
- me->set_elt_property ("stem-end-position", gh_double2scm (pos));
+ pos = get_default_stem_end_position (me);
+ me->set_property ("stem-end-position", scm_make_real (pos));
}
else
- pos = gh_scm2double (p);
+ pos = scm_to_double (p);
return pos;
}
Direction
-Stem::get_direction () const
+Stem::get_direction (Grob *me)
{
- Direction d = directional_element (this).get ();
+ Direction d = get_grob_direction (me);
if (!d)
{
- Stem * me = (Stem*) this;
- d = get_default_dir ();
- directional_element (me).set (d);
+ d = get_default_dir (me);
+ // urg, AAARGH!
+ set_grob_direction (me, d);
}
- return d ;
+ return d;
}
-
void
-Stem::set_stemend (Real se)
+Stem::set_stemend (Grob *me, Real se)
{
// todo: margins
- Direction d= get_direction ();
-
- if (d && d * head_positions()[get_direction ()] >= se*d)
- warning (_ ("Weird stem size; check for narrow beams"));
+ Direction d = get_direction (me);
+
+ if (d && d * head_positions (me)[get_direction (me)] >= se*d)
+ me->warning (_ ("Weird stem size; check for narrow beams"));
- set_elt_property ("stem-end-position", gh_double2scm (se));
+ me->set_property ("stem-end-position", scm_make_real (se));
}
-int
-Stem::type_i () const
+/* Note head that determines hshift for upstems
+ WARNING: triggers direction */
+Grob *
+Stem::support_head (Grob *me)
{
- return first_head () ? first_head ()->balltype_i () : 2;
+ if (head_count (me) == 1)
+ /* UGH. */
+ return unsmob_grob (scm_car (me->get_property ("note-heads")));
+ return first_head (me);
}
-/*
- Note head that determines hshift for upstems
- */
-Score_element*
-Stem::support_head ()const
-{
- SCM h = get_elt_property ("support-head");
- Score_element * nh = unsmob_element (h);
- if (nh)
- return nh;
- else if (heads_i () == 1)
- {
- /*
- UGH.
- */
-
- return unsmob_element (gh_car (get_elt_property ("heads")));
- }
- else
- return first_head ();
+int
+Stem::head_count (Grob *me)
+{
+ return Pointer_group_interface::count (me, ly_symbol2scm ("note-heads"));
}
-
-int
-Stem::heads_i ()const
+/* The note head which forms one end of the stem.
+ WARNING: triggers direction */
+Grob *
+Stem::first_head (Grob *me)
{
- Group_interface gi (this, "heads");
- return gi.count ();
+ Direction d = get_direction (me);
+ if (d)
+ return extremal_heads (me)[-d];
+ return 0;
}
-/*
- The note head which forms one end of the stem.
- */
-Note_head*
-Stem::first_head () const
+/* The note head opposite to the first head. */
+Grob *
+Stem::last_head (Grob *me)
{
- return extremal_heads ()[-get_direction ()];
+ Direction d = get_direction (me);
+ if (d)
+ return extremal_heads (me)[d];
+ return 0;
}
/*
- START is part where stem reaches `last' head.
- */
-Drul_array<Note_head*>
-Stem::extremal_heads () const
+ START is part where stem reaches `last' head.
+
+ This function returns a drul with (bottom-head, top-head).
+
+*/
+Drul_array<Grob*>
+Stem::extremal_heads (Grob *me)
{
const int inf = 1000000;
Drul_array<int> extpos;
extpos[DOWN] = inf;
- extpos[UP] = -inf;
-
- Drul_array<Note_head *> exthead;
- exthead[LEFT] = exthead[RIGHT] =0;
-
- for (SCM s = get_elt_property ("heads"); gh_pair_p (s); s = gh_cdr (s))
+ extpos[UP] = -inf;
+
+ Drul_array<Grob *> exthead (0, 0);
+ for (SCM s = me->get_property ("note-heads"); scm_is_pair (s);
+ s = scm_cdr (s))
{
- Note_head * n = dynamic_cast<Note_head*> (unsmob_element (gh_car (s)));
- Staff_symbol_referencer_interface si (n);
-
- int p = int(si.position_f ());
+ Grob *n = unsmob_grob (scm_car (s));
+ int p = Staff_symbol_referencer::get_rounded_position (n);
Direction d = LEFT;
- do {
- if (d* p > d* extpos[d])
+ do
{
- exthead[d] = n;
- extpos[d] = p;
- }
- } while (flip (&d) != DOWN);
+ if (d * p > d * extpos[d])
+ {
+ exthead[d] = n;
+ extpos[d] = p;
+ }
+ } while (flip (&d) != DOWN);
}
-
return exthead;
}
-void
-Stem::add_head (Rhythmic_head *n)
+static int
+integer_compare (int const &a, int const &b)
{
- n->set_elt_property ("stem", this->self_scm_);
- n->add_dependency (this);
+ return a - b;
+}
- Group_interface gi (this);
- if (Note_head *nh = dynamic_cast<Note_head *> (n))
- gi.name_ = "heads";
- else
- gi.name_ = "rests";
+/* The positions, in ascending order. */
+Array<int>
+Stem::note_head_positions (Grob *me)
+{
+ Array<int> ps ;
+ for (SCM s = me->get_property ("note-heads"); scm_is_pair (s);
+ s = scm_cdr (s))
+ {
+ Grob *n = unsmob_grob (scm_car (s));
+ int p = Staff_symbol_referencer::get_rounded_position (n);
- gi.add_element (n);
+ ps.push (p);
+ }
+
+ ps.sort (integer_compare);
+ return ps;
}
-Stem::Stem ()
+void
+Stem::add_head (Grob *me, Grob *n)
{
- set_elt_property ("heads", SCM_EOL);
- set_elt_property ("rests", SCM_EOL);
+ n->set_property ("stem", me->self_scm ());
+ n->add_dependency (me);
- dim_cache_[X_AXIS]->off_callbacks_.push ( &Stem::off_callback);
+ if (Note_head::has_interface (n))
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-heads"), n);
+ else if (Rest::has_interface (n))
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("rests"), n);
}
bool
-Stem::invisible_b () const
+Stem::is_invisible (Grob *me)
{
- /*
- UGH. Who determines balltype for stem?
- */
- Note_head * nh = dynamic_cast<Note_head*> (support_head ());
- return !(heads_i () && nh->balltype_i () >= 1);
+ Real stemlet_length = robust_scm2double (me->get_property ("stemlet-length"),
+ 0.0);
+
+ return !((head_count (me)
+ || stemlet_length > 0.0)
+ && scm_to_int (me->get_property ("duration-log")) >= 1);
}
-int
-Stem::get_center_distance (Direction d) const
+Direction
+Stem::get_default_dir (Grob *me)
{
int staff_center = 0;
- int distance = (int) (d*(head_positions()[d] - staff_center));
- return distance >? 0;
-}
+ Interval hp = head_positions (me);
+ if (hp.is_empty ())
+ return CENTER;
-Direction
-Stem::get_default_dir () const
-{
- int du = get_center_distance (UP);
- int dd = get_center_distance (DOWN);
+ int udistance = (int) (UP * hp[UP] - staff_center);
+ int ddistance = (int) (DOWN * hp[DOWN] - staff_center);
- if (sign (dd - du))
- return Direction (sign (dd -du));
+ if (sign (ddistance - udistance))
+ return Direction (sign (ddistance - udistance));
- return Direction (int(paper_l ()->get_var ("stem_default_neutral_direction")));
+ return to_dir (me->get_property ("neutral-direction"));
}
Real
-Stem::get_default_stem_end_position () const
+Stem::get_default_stem_end_position (Grob *me)
{
- bool grace_b = to_boolean (get_elt_property ("grace"));
- String type_str = grace_b ? "grace-" : "";
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ int durlog = duration_log (me);
SCM s;
Array<Real> a;
- Real length_f = 0.;
- SCM scm_len = get_elt_property("length");
- if (gh_number_p (scm_len))
- {
- length_f = gh_scm2double (scm_len);
- }
+ /* 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
{
- s = ly_eval_str (type_str + "stem-length");
- scm_to_array (s, &a);
- // stem uses half-spaces
- length_f = a[((flag_i () - 2) >? 0) <? (a.size () - 1)] * 2;
+ s = me->get_property ("lengths");
+ if (scm_is_pair (s))
+ length = 2 * scm_to_double (robust_list_ref (durlog - 2, s));
}
+ /* URGURGURG
+ 'set-default-stemlen' sets direction too. */
+ Direction dir = get_direction (me);
+ if (!dir)
+ {
+ dir = get_default_dir (me);
+ set_grob_direction (me, dir);
+ }
- s = ly_eval_str (type_str + "stem-shorten");
- scm_to_array (s, &a);
+ /* 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 = scm_is_pair (sshorten) ?
+ robust_list_ref ((duration_log (me) - 2) >? 0, sshorten): SCM_EOL;
+ Real shorten = 2* robust_scm2double (scm_shorten, 0);
- // stem uses half-spaces
+ /* On boundary: shorten only half */
+ if (abs (head_positions (me)[dir]) <= 1)
+ shorten *= 0.5;
- // fixme: use gh_list_ref () iso. array[]
- Real shorten_f = a[((flag_i () - 2) >? 0) <? (a.size () - 1)] * 2;
+ length -= shorten;
+ }
- /* URGURGURG
- 'set-default-stemlen' sets direction too
- */
- Direction dir = get_direction ();
- if (!dir)
+ /* Tremolo stuff. */
+ Grob *t_flag = unsmob_grob (me->get_property ("tremolo-flag"));
+ if (t_flag && !unsmob_grob (me->get_property ("beam")))
{
- dir = get_default_dir ();
- directional_element (this).set (dir);
+ /* 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 (t_flag).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);
}
-
- /*
- stems in unnatural (forced) direction should be shortened,
- according to [Roush & Gourlay]
- */
- if (((int)chord_start_f ())
- && (get_direction () != get_default_dir ()))
- length_f -= shorten_f;
+ Real st = dir ? hp[dir] + dir * length : 0;
- Real st = head_positions()[dir] + dir * length_f;
-
- bool no_extend_b = to_boolean (get_elt_property ("no-stem-extend"));
- if (!grace_b && !no_extend_b && dir * st < 0)
- st = 0.0;
+ /* 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;
}
-/*
- FIXME: wrong name
- */
+/* The log of the duration (Number of hooks on the flag minus two) */
int
-Stem::flag_i () const
+Stem::duration_log (Grob *me)
{
- SCM s = get_elt_property ("duration-log");
- return (gh_number_p (s)) ? gh_scm2int (s) : 2;
+ SCM s = me->get_property ("duration-log");
+ return (scm_is_number (s)) ? scm_to_int (s) : 2;
}
void
-Stem::position_noteheads ()
+Stem::position_noteheads (Grob *me)
{
- if (!heads_i ())
+ if (!head_count (me))
return;
-
- Link_array<Score_element> heads =
- Group_interface__extract_elements (this, (Score_element*)0, "heads");
+
+ Link_array<Grob> heads =
+ Pointer_group_interface__extract_grobs (me, (Grob*) 0, "note-heads");
heads.sort (compare_position);
- Direction dir =get_direction ();
-
+ Direction dir = get_direction (me);
+
if (dir < 0)
heads.reverse ();
+ Real thick = thickness (me);
- Real w = support_head ()->extent (X_AXIS)[dir];
- for (int i=0; i < heads.size (); i++)
- {
- heads[i]->translate_axis (w - heads[i]->extent (X_AXIS)[dir], X_AXIS);
- }
-
- bool parity= true; // todo: make this settable.
- int lastpos = int (Staff_symbol_referencer_interface (heads[0]).position_f ());
- for (int i=1; i < heads.size (); i ++)
+ Grob *hed = support_head (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);
+
+ 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_interface (heads[i]).position_f ();
- int dy =abs (lastpos- (int)p);
+ Real p = Staff_symbol_referencer::get_position (heads[i]);
+ Real dy = fabs (lastpos- p);
- if (dy <= 1)
+ /*
+ dy should always be 0.5, 0.0, 1.0, but provide safety margin
+ for rounding errors.
+ */
+ if (dy < 1.1)
{
if (parity)
{
- Real l = heads[i]->extent (X_AXIS).length ();
- heads[i]->translate_axis (l * get_direction (), X_AXIS);
+ 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.
+
+ |
+ X|
+ |X <- kern this.
+ |
+ X
+
+ */
}
parity = !parity;
}
else
parity = true;
-
+
lastpos = int (p);
}
}
-void
-Stem::do_pre_processing ()
+MAKE_SCHEME_CALLBACK (Stem, before_line_breaking, 1);
+SCM
+Stem::before_line_breaking (SCM smob)
{
- stem_end_position (); // ugh. Trigger direction calc.
- position_noteheads ();
+ Grob *me = unsmob_grob (smob);
- if (invisible_b ())
+ /*
+ Do the calculations for visible stems, but also for invisible stems
+ with note heads (i.e. half notes.)
+ */
+ if (head_count (me))
{
- set_elt_property ("transparent", SCM_BOOL_T);
- set_empty (Y_AXIS);
- set_empty (X_AXIS);
+ stem_end_position (me); // ugh. Trigger direction calc.
+ position_noteheads (me);
}
-
- set_spacing_hints ();
+
+ return SCM_UNSPECIFIED;
}
-
-
-/**
- set stem directions for hinting the optical spacing correction.
-
- Modifies DIR_LIST property of the Stem's Paper_column
-
- TODO: more advanced: supply height of noteheads as well, for more advanced spacing possibilities
+/*
+ ugh.
+ When in a beam with tuplet brackets, brew_mol is called early,
+ caching a wrong value.
*/
-void
-Stem::set_spacing_hints ()
+MAKE_SCHEME_CALLBACK (Stem, height, 2);
+SCM
+Stem::height (SCM smob, SCM ax)
{
- if (!invisible_b ())
+ Axis a = (Axis)scm_to_int (ax);
+ Grob *me = unsmob_grob (smob);
+ assert (a == Y_AXIS);
+
+ /*
+ ugh. - this dependency should be automatic.
+ */
+ Grob *beam = get_beam (me);
+ if (beam)
{
- SCM scmdir = gh_int2scm (get_direction ());
- SCM dirlist = column_l ()->get_elt_property ("dir-list");
- if (dirlist == SCM_UNDEFINED)
- dirlist = SCM_EOL;
+ Beam::after_line_breaking (beam->self_scm ());
+ }
- if (scm_sloppy_memq (scmdir, dirlist) == SCM_EOL)
+ 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);
+ if (d == CENTER)
{
- dirlist = gh_cons (scmdir, dirlist);
- column_l ()->set_elt_property ("dir-list", dirlist);
+ programming_error ("No stem direction");
+ d = UP;
}
+ iv[d] += d * Beam::get_thickness (b) * 0.5 ;
}
+
+ return ly_interval2scm (iv);
}
-Molecule
-Stem::flag () const
+
+Stencil
+Stem::flag (Grob *me)
{
- String style;
- SCM st = get_elt_property ("flag-style");
- if ( gh_string_p (st))
+ /* 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.
+ */
{
- style = ly_scm2string (st);
+ 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
+ {
+ staffline_offs = "";
+ }
+
+ 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 (scm_is_string (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);
+ }
}
- char c = (get_direction () == UP) ? 'u' : 'd';
- Molecule m = lookup_l ()->afm_find (String ("flags-") + to_str (c) +
- to_str (flag_i ()));
- if (!style.empty_b ())
- m.add_molecule(lookup_l ()->afm_find (String ("flags-") + to_str (c) + style));
- return m;
+ return flag;
}
-Interval
-Stem::dim_callback (Dimension_cache const* c)
+MAKE_SCHEME_CALLBACK (Stem, width_callback, 2);
+SCM
+Stem::width_callback (SCM e, SCM ax)
{
- Stem * s = dynamic_cast<Stem*> (c->element_l ());
+ Axis a = (Axis) scm_to_int (ax);
+ assert (a == X_AXIS);
+ Grob *me = unsmob_grob (e);
+
+ Interval r;
- Interval r (0, 0);
- if (unsmob_element (s->get_elt_property ("beam")) || abs (s->flag_i ()) <= 2)
- ; // TODO!
- else
+ if (is_invisible (me))
{
- r = s->flag ().dim_.x ();
+ r.set_empty ();
+ }
+ else if (unsmob_grob (me->get_property ("beam")) || abs (duration_log (me)) <= 2)
+ {
+ r = Interval (-1, 1);
+ r *= thickness (me)/2;
}
- return r;
+ else
+ {
+ r = flag (me).extent (X_AXIS)
+ + thickness (me)/2;
+ }
+ return ly_interval2scm (r);
}
+Real
+Stem::thickness (Grob *me)
+{
+ return scm_to_double (me->get_property ("thickness"))
+ * Staff_symbol_referencer::line_thickness (me);
+}
-const Real ANGLE = 20* (2.0*M_PI/360.0); // ugh!
-
-Molecule*
-Stem::do_brew_molecule_p () const
+MAKE_SCHEME_CALLBACK (Stem, print, 1);
+SCM
+Stem::print (SCM smob)
{
- Molecule *mol_p =new Molecule;
+ Grob *me = unsmob_grob (smob);
+ Stencil mol;
+ Direction d = get_direction (me);
- Staff_symbol_referencer_interface si (first_head ());
+ Real stemlet_length = robust_scm2double (me->get_property ("stemlet-length"),
+ 0.0);
+ bool stemlet = stemlet_length > 0.0;
- Real y1 = si.position_f();
- Real y2 = stem_end_position ();
-
- Interval stem_y(y1,y2);
- stem_y.unite (Interval (y2,y1));
-
- Real dy = staff_symbol_referencer (this).staff_space ()/2.0;
- Real head_wid = 0;
- if (support_head ())
- head_wid = support_head ()->extent (X_AXIS).length ();
- stem_y[Direction(-get_direction ())] += get_direction () * head_wid * tan(ANGLE)/(2*dy);
-
- if (!invisible_b ())
+ /* 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);
+ Grob *beam = get_beam (me);
+
+ if (!lh && !stemlet)
+ return SCM_EOL;
+
+ if (stemlet && !beam)
+ return SCM_EOL;
+
+ if (is_invisible (me))
+ return SCM_EOL;
+
+ Real y2 = stem_end_position (me);
+ Real y1 = y2;
+ Real half_space = Staff_symbol_referencer::staff_space (me) * 0.5;
+
+
+ if (lh)
+ y2 = Staff_symbol_referencer::get_position (lh);
+ else if (stemlet)
{
- Real stem_width = paper_l ()->get_var ("stemthickness");
- Molecule ss =lookup_l ()->filledbox (Box (Interval (-stem_width/2, stem_width/2),
- Interval (stem_y[DOWN]*dy, stem_y[UP]*dy)));
- mol_p->add_molecule (ss);
+ Real beam_translation = Beam::get_beam_translation (beam);
+ Real beam_thickness = Beam::get_thickness (beam);
+ int beam_count = beam_multiplicity (me).length () + 1;
+
+ y2 -= d
+ * (0.5 * beam_thickness
+ + beam_translation * (0 >? (beam_count - 1))
+ + stemlet_length) / half_space;
}
- if (!beam_l () && abs (flag_i ()) > 2)
+ Interval stem_y (y1 <? y2, y2 >? y1);
+
+ if (Grob *hed = support_head (me))
{
- Molecule fl = flag ();
- fl.translate_axis(stem_y[get_direction ()]*dy, Y_AXIS);
- mol_p->add_molecule (fl);
+ /*
+ 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);
+
+ y_attach = head_height.linear_combination (y_attach);
+ stem_y[Direction (-d)] += d * y_attach/half_space;
}
- return mol_p;
-}
-Real
-Stem::off_callback (Dimension_cache const * c)
-{
- Stem * st = dynamic_cast<Stem*> (c->element_l ());
+ // URG
+ Real stem_width = thickness (me);
+ Real blot =
+ me->get_layout ()->get_dimension (ly_symbol2scm ("blotdiameter"));
+
+ Box b = Box (Interval (-stem_width/2, stem_width/2),
+ Interval (stem_y[DOWN]*half_space, stem_y[UP]*half_space));
- Real r=0;
- if (Note_head * f = st->first_head ())
+ Stencil ss = Lookup::round_filled_box (b, blot);
+ mol.add_stencil (ss);
+
+ if (!get_beam (me) && abs (duration_log (me)) > 2)
{
- Interval head_wid(0, f->extent (X_AXIS).length ());
-
- if (to_boolean (st->get_elt_property ("stem-centered")))
- return head_wid.center ();
-
- Real rule_thick = st->paper_l ()->get_var ("stemthickness");
- Direction d = st->get_direction ();
- r = head_wid[d] - d * rule_thick ;
+ Stencil fl = flag (me);
+ fl.translate_axis (stem_y[d]*half_space - d * blot/2, Y_AXIS);
+ fl.translate_axis (stem_width/2, X_AXIS);
+ mol.add_stencil (fl);
}
- return r;
+
+ return mol.smobbed_copy ();
}
+/*
+ move the stem to right of the notehead if it is up.
+ */
+MAKE_SCHEME_CALLBACK (Stem, offset_callback, 2);
+SCM
+Stem::offset_callback (SCM element_smob, SCM)
+{
+ Grob *me = unsmob_grob (element_smob);
+ Real r = 0.0;
+
+ 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;
+ }
+ }
+ else
+ {
+ SCM rests = me->get_property ("rests");
+ if (scm_is_pair (rests))
+ {
+ Grob * rest = unsmob_grob (scm_car (rests));
+ r = rest->extent (rest, X_AXIS).center ();
+ }
+ }
+ return scm_make_real (r);
+}
+Spanner *
+Stem::get_beam (Grob *me)
+{
+ SCM b = me->get_property ("beam");
+ return dynamic_cast<Spanner*> (unsmob_grob (b));
+}
-Beam*
-Stem::beam_l ()const
+Stem_info
+Stem::get_stem_info (Grob *me)
{
- SCM b= get_elt_property ("beam");
- return dynamic_cast<Beam*> (unsmob_element (b));
+ /* Return cached info if available */
+ SCM scm_info = me->get_property ("stem-info");
+ if (!scm_is_pair (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 (scm_car (scm_info));
+ si.shortest_y_ = scm_to_double (scm_cadr (scm_info));
+ return si;
}
-// ugh still very long.
-Stem_info
-Stem::calc_stem_info () const
+/* TODO: add extra space for tremolos! */
+void
+Stem::calc_stem_info (Grob *me)
{
- assert (beam_l ());
+ Direction my_dir = get_grob_direction (me);
- Direction beam_dir = directional_element (beam_l ()).get ();
- if (!beam_dir)
+ if (!my_dir)
{
- programming_error ("Beam dir not set.");
- beam_dir = UP;
+ programming_error ("No stem dir set?");
+ my_dir = UP;
}
-
- Staff_symbol_referencer_interface st (this);
- Real staff_space = st.staff_space ();
- Real half_space = staff_space / 2;
- Real interbeam_f = paper_l ()->interbeam_f (beam_l ()->get_multiplicity ());
- Real thick = gh_scm2double (beam_l ()->get_elt_property ("beam-thickness"));
- int multiplicity = beam_l ()->get_multiplicity ();
- Stem_info info;
- info.idealy_f_ = chord_start_f ();
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+ 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);
- // for simplicity, we calculate as if dir == UP
- info.idealy_f_ *= beam_dir;
- SCM grace_prop = get_elt_property ("grace");
- bool grace_b = to_boolean (grace_prop);
-
- Array<Real> a;
- SCM s;
- String type_str = grace_b ? "grace-" : "";
-
- s = ly_eval_str (type_str + "beamed-stem-minimum-length");
- scm_to_array (s, &a);
- Real minimum_length = a[multiplicity <? (a.size () - 1)] * staff_space;
+ /* 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
+ ;
- s = ly_eval_str (type_str + "beamed-stem-length");
- scm_to_array (s, &a);
- Real stem_length = a[multiplicity <? (a.size () - 1)] * staff_space;
+ /* 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;
- if (!beam_dir || (beam_dir == directional_element (this).get ()))
- /* normal beamed stem */
- {
- if (multiplicity)
- {
- info.idealy_f_ += thick + (multiplicity - 1) * interbeam_f;
- }
- info.miny_f_ = info.idealy_f_;
- info.maxy_f_ = INT_MAX;
- info.idealy_f_ += stem_length;
- info.miny_f_ += minimum_length;
+ /* UGH
+ It seems that also for ideal minimum length, we must use
+ the maximum beam count (for this direction):
- /*
- lowest beam of (UP) beam must never be lower than second staffline
+ \score{ \notes\relative c''{ [a8 a32] }}
- Hmm, reference (Wanske?)
+ must be horizontal. */
+ Real height_of_my_beams = beam_thickness
+ + (beam_count - 1) * beam_translation;
- 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 (get_elt_property ("no-stem-extend"));
- if (!grace_b && !no_extend_b)
- {
- /* highest beam of (UP) beam must never be lower than middle
- staffline
- lowest beam of (UP) beam must never be lower than second staffline
- */
- info.miny_f_ =
- info.miny_f_ >? 0
- >? (- 2 * half_space - thick
- + (multiplicity > 0) * thick
- + interbeam_f * (multiplicity - 1));
- }
- }
- else
- /* knee */
- {
- info.idealy_f_ -= thick;
- info.maxy_f_ = info.idealy_f_;
- info.miny_f_ = -INT_MAX;
+ Real ideal_minimum_length = ideal_minimum_free
+ + height_of_my_beams
+ /* stem only extends to center of beam */
+ - 0.5 * beam_thickness;
+
+ ideal_length = 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 ideal_y = note_start + ideal_length;
+
+
+ /* Conditions for Y position */
+
+ /* 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.
+
+ Reference?
+
+ Obviously not for grace beams.
- info.idealy_f_ -= stem_length;
- info.maxy_f_ -= minimum_length;
+ 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 */
+ 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.idealy_f_ = (info.maxy_f_ <? info.idealy_f_) >? info.miny_f_;
- s = beam_l ()->get_elt_property ("shorten");
- if (gh_number_p (s))
- info.idealy_f_ -= gh_double2scm (s);
- Real interstaff_f = -beam_dir* calc_interstaff_dist (this, beam_l ());
+ 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;
+
+ Real minimum_length = minimum_free
+ + 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)));
+}
+
+Slice
+Stem::beam_multiplicity (Grob *stem)
+{
+ SCM beaming = stem->get_property ("beaming");
+ Slice le = int_list_to_slice (scm_car (beaming));
+ Slice ri = int_list_to_slice (scm_cdr (beaming));
+ le.unite (ri);
+ return le;
+}
- info.idealy_f_ += interstaff_f;
- info.miny_f_ += interstaff_f;
- info.maxy_f_ += interstaff_f ;
- return info;
+/* 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 "
+ "stemlet-length rests "
+ "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;
+}
projects / lilypond.git / blobdiff