source file of the GNU LilyPond music typesetter
- (c) 1996, 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1996--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
TODO: This is way too hairy
*/
+#include <math.h> // m_pi
+
+#include "lookup.hh"
+#include "directional-element-interface.hh"
+#include "note-head.hh"
#include "stem.hh"
#include "debug.hh"
#include "paper-def.hh"
-#include "note-head.hh"
-#include "lookup.hh"
+#include "rhythmic-head.hh"
+#include "font-interface.hh"
#include "molecule.hh"
#include "paper-column.hh"
#include "misc.hh"
#include "beam.hh"
#include "rest.hh"
+#include "group-interface.hh"
+#include "staff-symbol-referencer.hh"
+#include "spanner.hh"
+#include "side-position-interface.hh"
void
-Stem::set_direction (Direction d)
+Stem::set_beaming (Grob*me ,int i, Direction d)
{
- if (!dir_)
- warning (_ ("stem direction set already!"));
-
- dir_ = d;
+ SCM pair = me->get_grob_property ("beaming");
+
+ if (!gh_pair_p (pair))
+ {
+ pair = gh_cons (gh_int2scm (0),gh_int2scm (0));
+ me-> set_grob_property ("beaming", pair);
+ }
+ index_set_cell (pair, d, gh_int2scm (i));
+}
- /*
- todo
- */
+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 0;
}
-Stem::Stem ()
+Interval
+Stem::head_positions (Grob*me)
{
- beams_i_drul_[LEFT] = beams_i_drul_[RIGHT] = -1;
- yextent_drul_[DOWN] = yextent_drul_[UP] = 0;
- flag_i_ = 2;
- dir_ = CENTER;
- beam_l_ = 0;
+ if (!heads_i (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]));
}
-Interval_t<int>
-Stem::head_positions () const
+
+Real
+Stem::chord_start_f (Grob*me)
{
- /*
- Mysterious FreeBSD fix by John Galbraith. Somehow, the empty intervals
- trigger FP exceptions on FreeBSD. Fix: do not return infinity
+ return head_positions (me)[get_direction (me)]
+ * Staff_symbol_referencer::staff_space (me)/2.0;
+}
- */
- if (!head_l_arr_.size ())
+Real
+Stem::stem_end_position (Grob*me)
+{
+ SCM p =me->get_grob_property ("stem-end-position");
+ Real pos;
+ if (!gh_number_p (p))
{
- return Interval_t<int> (100,-100);
+ pos = get_default_stem_end_position (me);
+ me->set_grob_property ("stem-end-position", gh_double2scm (pos));
}
+ else
+ pos = gh_scm2double (p);
+
+ return pos;
+}
- Interval_t<int> r;
- for (int i =0; i < head_l_arr_.size (); i++)
+Direction
+Stem::get_direction (Grob*me)
+{
+ Direction d = Directional_element_interface::get (me);
+
+ if (!d)
{
- int p = (int)head_l_arr_[i]->position_f ();
- r[BIGGER] = r[BIGGER] >? p;
- r[SMALLER] = r[SMALLER] <? p;
+ d = get_default_dir (me);
+ // urg, AAARGH!
+ Directional_element_interface::set (me, d);
}
- return r;
+ return d ;
}
+
void
-Stem::do_print () const
+Stem::set_stemend (Grob*me, Real se)
{
-#ifndef NPRINT
- DEBUG_OUT << "flag "<< flag_i_;
- if (beam_l_)
- DEBUG_OUT << "beamed";
-#endif
+ // todo: margins
+ 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"));
+
+ me->set_grob_property ("stem-end-position", gh_double2scm (se));
}
-Real
-Stem::stem_length_f () const
+int
+Stem::type_i (Grob*me)
{
- return yextent_drul_[UP]-yextent_drul_[DOWN] ;
+ return first_head (me) ? Rhythmic_head::balltype_i (first_head (me)) : 2;
}
-Real
-Stem::stem_begin_f () const
+/*
+ Note head that determines hshift for upstems
+ */
+Grob*
+Stem::support_head (Grob*me)
{
- return yextent_drul_[Direction(-dir_)];
+ SCM h = me->get_grob_property ("support-head");
+ Grob * nh = unsmob_grob (h);
+ if (nh)
+ return nh;
+ else if (heads_i (me) == 1)
+ {
+ /*
+ UGH.
+ */
+
+ return unsmob_grob (ly_car (me->get_grob_property ("heads")));
+ }
+ else
+ return first_head (me);
}
-Real
-Stem::chord_start_f () const
+
+int
+Stem::heads_i (Grob*me)
{
- return head_positions()[dir_] * staff_line_leading_f ()/2.0;
+ return Pointer_group_interface::count (me, "heads");
}
-Real
-Stem::stem_end_f () const
+/*
+ The note head which forms one end of the stem.
+ */
+Grob*
+Stem::first_head (Grob*me)
{
- return yextent_drul_[dir_];
+ return extremal_heads (me)[-get_direction (me)];
}
-void
-Stem::set_stemend (Real se)
+/*
+ START is part where stem reaches `last' head.
+ */
+Drul_array<Grob*>
+Stem::extremal_heads (Grob*me)
{
- // todo: margins
- if (dir_ && dir_ * head_positions()[dir_] >= se*dir_)
- warning (_ ("Weird stem size; check for narrow beams"));
-
+ const int inf = 1000000;
+ Drul_array<int> extpos;
+ extpos[DOWN] = inf;
+ extpos[UP] = -inf;
+
+ Drul_array<Grob *> exthead;
+ exthead[LEFT] = exthead[RIGHT] =0;
- yextent_drul_[dir_] = se;
- yextent_drul_[Direction(-dir_)] = head_positions()[-dir_];
+ for (SCM s = me->get_grob_property ("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));
+
+ Direction d = LEFT;
+ do {
+ if (d* p > d* extpos[d])
+ {
+ exthead[d] = n;
+ extpos[d] = p;
+ }
+ } while (flip (&d) != DOWN);
+ }
+
+ return exthead;
}
-int
-Stem::type_i () const
+static int
+icmp (int const &a, int const &b)
{
- return head_l_arr_[0]->balltype_i_;
+ return a-b;
}
+Array<int>
+Stem::note_head_positions (Grob *me)
+{
+ Array<int> ps ;
+ for (SCM s = me->get_grob_property ("heads"); gh_pair_p (s); s = ly_cdr (s))
+ {
+ Grob * n = unsmob_grob (ly_car (s));
+ int p = int (Staff_symbol_referencer::position_f (n));
+
+ ps.push (p);
+ }
+
+ ps.sort (icmp);
+ return ps;
+}
+
+
void
-Stem::add_head (Rhythmic_head *n)
+Stem::add_head (Grob*me, Grob *n)
{
- n->stem_l_ = this;
- n->add_dependency (this); // ?
- if (Note_head *nh = dynamic_cast<Note_head *> (n))
+ n->set_grob_property ("stem", me->self_scm ());
+ n->add_dependency (me);
+
+ if (Note_head::has_interface (n))
{
- head_l_arr_.push (nh);
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("heads"), n);
}
- else if (Rest *r = dynamic_cast<Rest *> (n))
+ else
{
- rest_l_arr_.push (r);
+ n->set_grob_property ("rest", n->self_scm ());
}
}
bool
-Stem::invisible_b () const
+Stem::invisible_b (Grob*me)
{
- return (!head_l_arr_.size () ||
- head_l_arr_[0]->balltype_i_ <= 0);
+ return ! (heads_i (me) && Rhythmic_head::balltype_i (support_head (me)) >= 1);
}
int
-Stem::get_center_distance (Direction d) const
+Stem::get_center_distance (Grob*me, Direction d)
{
int staff_center = 0;
- int distance = d*(head_positions()[d] - staff_center);
+ int distance = (int) (d* (head_positions (me)[d] - staff_center));
return distance >? 0;
}
Direction
-Stem::get_default_dir () const
+Stem::get_default_dir (Grob*me)
{
- int du = get_center_distance (UP);
- int dd = get_center_distance (DOWN);
+ int du = get_center_distance (me,UP);
+ int dd = get_center_distance (me,DOWN);
if (sign (dd - du))
return Direction (sign (dd -du));
- return Direction (int(paper_l ()->get_var ("stem_default_neutral_direction")));
+ return to_dir (me->get_grob_property ("neutral-direction"));
}
-Direction
-Stem::get_dir () const
+Real
+Stem::get_default_stem_end_position (Grob*me)
{
- return dir_;
-}
-
+ bool grace_b = to_boolean (me->get_grob_property ("grace"));
+ SCM s;
+ Array<Real> a;
-void
-Stem::set_default_stemlen ()
-{
Real length_f = 0.;
- SCM scm_len = get_elt_property("length");
- if (scm_len != SCM_UNDEFINED)
+ SCM scm_len = me->get_grob_property ("length");
+ if (gh_number_p (scm_len))
{
length_f = gh_scm2double (scm_len);
}
else
- length_f = paper_l ()->get_var ("stem_length0");
+ {
+ 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;
+ }
+
- bool grace_b = get_elt_property ("grace") != SCM_UNDEFINED;
- String type_str = grace_b ? "grace_" : "";
+ 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)));
- Real shorten_f = paper_l ()->get_var (type_str + "forced_stem_shorten0");
- if (!dir_)
- dir_ = get_default_dir ();
+ // 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;
+
+ /* URGURGURG
+ 'set-default-stemlen' sets direction too
+ */
+ Direction dir = get_direction (me);
+ if (!dir)
+ {
+ dir = get_default_dir (me);
+ Directional_element_interface::set (me, dir);
+ }
+
/*
stems in unnatural (forced) direction should be shortened,
according to [Roush & Gourlay]
*/
- if (((int)chord_start_f ())
- && (dir_ != get_default_dir ()))
+ if (( (int)chord_start_f (me))
+ && (get_direction (me) != get_default_dir (me)))
length_f -= shorten_f;
- if (flag_i_ >= 5)
- length_f += 2.0;
- if (flag_i_ >= 6)
- length_f += 1.0;
+ Interval hp = head_positions (me);
+ Real st = hp[dir] + dir * length_f;
+
+
- set_stemend ((dir_ > 0) ? head_positions()[BIGGER] + length_f:
- head_positions()[SMALLER] - length_f);
- bool no_extend_b = get_elt_property ("no-stem-extend") != SCM_UNDEFINED;
- if (!grace_b && !no_extend_b && (dir_ * stem_end_f () < 0))
- set_stemend (0);
+ /*
+ Make a little room if we have a flag and there is a dot.
+
+ TODO:
+
+ maybe we should consider moving the dot to the right?
+ */
+ if (!beam_l (me)
+ && flag_i (me))
+ {
+ Grob * closest_to_flag = extremal_heads (me)[dir];
+ Grob * dots = closest_to_flag
+ ? Rhythmic_head::dots_l (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
+
+ /*
+ 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. */
+ }
+ }
+
+
+ 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;
}
-//xxx
-void
-Stem::set_default_extents ()
-{
- if (!stem_length_f ())
- set_default_stemlen ();
+
+/*
+ Number of hooks on the flag, ie. the log of the duration.
+ */
+int
+Stem::flag_i (Grob*me)
+{
+ SCM s = me->get_grob_property ("duration-log");
+ return (gh_number_p (s)) ? gh_scm2int (s) : 2;
}
void
-Stem::set_noteheads ()
+Stem::position_noteheads (Grob*me)
{
- if (!head_l_arr_.size ())
+ if (!heads_i (me))
return;
- head_l_arr_.sort (Note_head::compare);
- if (dir_ < 0)
- head_l_arr_.reverse ();
-
- Note_head * beginhead = head_l_arr_[0];
- beginhead->set_elt_property ("extremal", SCM_BOOL_T);
- if (beginhead != head_l_arr_.top ())
- head_l_arr_.top ()->set_elt_property ("extremal", SCM_BOOL_T);
- int parity=1;
- int lastpos = int (beginhead->position_f ());
- for (int i=1; i < head_l_arr_.size (); i ++)
+ Link_array<Grob> heads =
+ Pointer_group_interface__extract_grobs (me, (Grob*)0, "heads");
+
+ heads.sort (compare_position);
+ Direction dir =get_direction (me);
+
+ if (dir < 0)
+ heads.reverse ();
+
+
+ Grob *hed = support_head (me);
+ Real w = Note_head::head_extent (hed,X_AXIS)[dir];
+ for (int i=0; i < heads.size (); i++)
+ {
+ heads[i]->translate_axis (w - Note_head::head_extent (heads[i],X_AXIS)[dir],
+ X_AXIS);
+ }
+
+ bool parity= true; // todo: make me settable.
+ int lastpos = int (Staff_symbol_referencer::position_f (heads[0]));
+ for (int i=1; i < heads.size (); i ++)
{
- int dy =abs (lastpos- (int)head_l_arr_[i]->position_f ());
+ Real p = Staff_symbol_referencer::position_f (heads[i]);
+ int dy =abs (lastpos- (int)p);
if (dy <= 1)
{
if (parity)
- head_l_arr_[i]->flip_around_stem (dir_);
+ {
+ Real l = Note_head::head_extent (heads[i], X_AXIS).length ();
+
+ heads[i]->translate_axis (l * get_direction (me), X_AXIS);
+ }
parity = !parity;
}
else
- parity = 1;
- lastpos = int (head_l_arr_[i]->position_f ());
+ 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)
{
- if (yextent_drul_[DOWN]== yextent_drul_[UP])
- set_default_extents ();
- set_noteheads ();
+ Grob*me = unsmob_grob (smob);
+ stem_end_position (me); // ugh. Trigger direction calc.
+ position_noteheads (me);
- if (invisible_b ())
+ if (invisible_b (me))
{
- set_elt_property ("transparent", SCM_BOOL_T);
+ me->remove_grob_property ("molecule-callback");
+ // suicide ();
}
- set_empty (invisible_b (), X_AXIS, Y_AXIS);
- set_spacing_hints ();
+
+ return SCM_UNSPECIFIED;
}
-
-
-/**
- set stem directions for hinting the optical spacing correction.
-
- Modifies DIR_LIST property of the Stem's Score_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 ())
- {
- SCM scmdir = gh_int2scm (dir_);
- SCM dirlist = column_l ()->get_elt_property ("dir-list");
- if (dirlist == SCM_UNDEFINED)
- dirlist = SCM_EOL;
-
- if (scm_sloppy_memq (scmdir, dirlist) == SCM_EOL)
- {
- dirlist = gh_cons (scmdir, dirlist);
- column_l ()->set_elt_property ("dir-list", dirlist);
- }
- }
+ Axis a = (Axis)gh_scm2int (ax);
+ Grob * me = unsmob_grob (smob);
+ assert (a == Y_AXIS);
+
+ SCM mol = me->get_uncached_molecule ();
+ Interval iv;
+ if (mol != SCM_EOL)
+ iv = unsmob_molecule (mol)->extent (a);
+ return ly_interval2scm (iv);
}
+
Molecule
-Stem::flag () const
+Stem::flag (Grob*me)
{
- String style;
- SCM st = get_elt_property ("style");
- if ( st != SCM_UNDEFINED)
+ /* 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))
{
- style = ly_scm2string (st);
+ fstyle = ly_scm2string (fst);
}
- char c = (dir_ == 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));
+ SCM st = me->get_grob_property ("style");
+ if (gh_symbol_p (st))
+ {
+ style = (ly_scm2string (scm_symbol_to_string (st)));
+ }
+ else
+ {
+ style = "";
+ }
+ bool adjust = to_boolean (me->get_grob_property ("adjust-if-on-staffline"));
+
+ if (String::compare_i (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)
+ {
+ /* Urrgh! We have to detect wether this stem ends on a staff
+ line or between two staff lines. But we can not call
+ stem_end_position(me) or get_default_stem_end_position(me),
+ since this encounters the flag and hence results in an
+ infinite recursion. However, in pure mensural notation,
+ there are no multiple note heads attached to a single stem,
+ neither is there usually need for using the stem_shorten
+ property (except for 32th and 64th notes, but that is not a
+ problem since the stem length in this case is augmented by
+ an integral multiple of staff_space). Hence, it should be
+ sufficient to just take the first note head, assume it's
+ the only one, look if it's on a staff line, and select the
+ flag's shape accordingly. In the worst case, the shape
+ looks slightly misplaced, but that will usually be the
+ programmer's fault (e.g. when trying to attach multiple
+ note heads to a single stem in mensural notation). */
+ Grob *first = first_head(me);
+ int sz = Staff_symbol_referencer::line_count (me)-1;
+ int p = (int)rint (Staff_symbol_referencer::position_f (first));
+ staffline_offs = (((p ^ sz) & 0x1) == 0) ? "1" : "0";
+ }
+ else
+ {
+ staffline_offs = "2";
+ }
+ }
+ 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;
}
-Interval
-Stem::do_width () const
+MAKE_SCHEME_CALLBACK (Stem,dim_callback,2);
+SCM
+Stem::dim_callback (SCM e, SCM ax)
{
+ Axis a = (Axis) gh_scm2int (ax);
+ assert (a == X_AXIS);
+ Grob *se = unsmob_grob (e);
Interval r (0, 0);
- if (beam_l_ || abs (flag_i_) <= 2)
+ if (unsmob_grob (se->get_grob_property ("beam")) || abs (flag_i (se)) <= 2)
; // TODO!
else
{
- r = flag ().dim_.x ();
- r += note_delta_f ();
+ r = flag (se).extent (X_AXIS);
}
- return r;
+ return ly_interval2scm (r);
}
+
+MAKE_SCHEME_CALLBACK (Stem,brew_molecule,1);
-
-const Real ANGLE = 20* (2.0*M_PI/360.0); // ugh!
-
-Molecule*
-Stem::do_brew_molecule_p () const
+SCM
+Stem::brew_molecule (SCM smob)
{
- Molecule *mol_p =new Molecule;
- Drul_array<Real> stem_y = yextent_drul_;
- Real dy = staff_line_leading_f ()/2.0;
-
- Real head_wid = 0;
- if (head_l_arr_.size ())
- head_wid = head_l_arr_[0]->extent (X_AXIS).length ();
- stem_y[Direction(-dir_)] += dir_ * head_wid * tan(ANGLE)/(2*dy);
+ Grob*me = unsmob_grob (smob);
+ Molecule mol;
+ Direction d = get_direction (me);
+
+
+ Real y1 = Staff_symbol_referencer::position_f (first_head (me));
+ Real y2 = stem_end_position (me);
- if (!invisible_b ())
+ Interval stem_y (y1 <? y2,y2 >? y1);
+
+
+ // dy?
+ Real dy = Staff_symbol_referencer::staff_space (me) * 0.5;
+
+ if (Grob *hed = support_head (me))
{
- 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);
+ /*
+ 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);
+
+ y_attach = head_height.linear_combination (y_attach);
+ stem_y[Direction (-d)] += d * y_attach/dy;
}
-
- if (!beam_l_ && abs (flag_i_) > 2)
+
+ if (!invisible_b (me))
{
- Molecule fl = flag ();
- fl.translate_axis(stem_y[dir_]*dy, Y_AXIS);
- mol_p->add_molecule (fl);
+ Real stem_width = gh_scm2double (me->get_grob_property ("thickness"))
+ // URG
+ * me->paper_l ()->get_var ("stafflinethickness");
+
+ Molecule ss =Lookup::filledbox (Box (Interval (-stem_width/2, stem_width/2),
+ Interval (stem_y[DOWN]*dy, stem_y[UP]*dy)));
+ mol.add_molecule (ss);
}
- if (head_l_arr_.size())
+ if (!beam_l (me) && abs (flag_i (me)) > 2)
{
- mol_p->translate_axis (note_delta_f (), X_AXIS);
+ Molecule fl = flag (me);
+ fl.translate_axis (stem_y[d]*dy, Y_AXIS);
+ mol.add_molecule (fl);
}
- return mol_p;
+
+ return mol.smobbed_copy ();
}
-Real
-Stem::note_delta_f () const
+/*
+ move the stem to right of the notehead if it is up.
+ */
+MAKE_SCHEME_CALLBACK (Stem,off_callback,2);
+SCM
+Stem::off_callback (SCM element_smob, SCM)
{
+ Grob *me = unsmob_grob (element_smob);
+
Real r=0;
- if (head_l_arr_.size())
+ if (Grob * f = first_head (me))
{
- Interval head_wid(0, head_l_arr_[0]->extent (X_AXIS).length ());
- Real rule_thick = paper_l ()->get_var ("stemthickness");
+ Interval head_wid = Note_head::head_extent(f, X_AXIS);
- Interval stem_wid(-rule_thick/2, rule_thick/2);
- if (dir_ == CENTER)
- r = head_wid.center ();
- else
- r = head_wid[dir_] - stem_wid[dir_];
+ Real 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
+ = gh_scm2double (me->get_grob_property ("thickness"))
+ * me->paper_l ()->get_var ("stafflinethickness");
+
+
+ r += - d * rule_thick * 0.5;
+ }
}
- return r;
+ return gh_double2scm (r);
}
-Real
-Stem::hpos_f () const
+
+
+Grob*
+Stem::beam_l (Grob*me)
{
- return note_delta_f () + Item::hpos_f ();
+ SCM b= me->get_grob_property ("beam");
+ return unsmob_grob (b);
}
-void
-Stem::do_substitute_element_pointer (Score_element*o,Score_element*n)
+
+// ugh still very long.
+Stem_info
+Stem::calc_stem_info (Grob*me)
{
- if (Note_head*h=dynamic_cast<Note_head*> (o))
- head_l_arr_.substitute (h, dynamic_cast<Note_head*>(n));
- if (Rest *r=dynamic_cast<Rest*> (o))
- rest_l_arr_.substitute (r, dynamic_cast<Rest*>(n));
- if (Beam* b = dynamic_cast<Beam*> (o))
+ Grob * beam = beam_l (me);
+
+ Direction beam_dir = Directional_element_interface::get (beam);
+ if (!beam_dir)
{
- if (b == beam_l_)
- beam_l_ = dynamic_cast<Beam*> (n);
+ programming_error ("Beam dir not set.");
+ beam_dir = UP;
}
- Staff_symbol_referencer::do_substitute_element_pointer (o,n);
+
+
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+ Real half_space = staff_space / 2;
+ int multiplicity = Beam::get_multiplicity (beam);
+
+
+ SCM space_proc = beam->get_grob_property ("space-function");
+ SCM space = gh_call1 (space_proc, gh_int2scm (multiplicity));
+ Real interbeam_f = gh_scm2double (space) * staff_space;
+
+ Real thick = gh_scm2double (beam->get_grob_property ("thickness"));
+ Stem_info info;
+ info.idealy_f_ = chord_start_f (me);
+
+ // for simplicity, we calculate as if dir == UP
+ info.idealy_f_ *= beam_dir;
+ SCM grace_prop = me->get_grob_property ("grace");
+
+ bool grace_b = to_boolean (grace_prop);
+
+ Array<Real> a;
+ SCM s;
+
+ s = me->get_grob_property ("beamed-minimum-lengths");
+ a.clear ();
+ for (SCM q = s; q != SCM_EOL; q = ly_cdr (q))
+ a.push (gh_scm2double (ly_car (q)));
+
+
+ Real minimum_length = a[multiplicity <? (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[multiplicity <? (a.size () - 1)] * staff_space;
+
+ if (!beam_dir || (beam_dir == Directional_element_interface::get (me)))
+ /* normal beamed stem */
+ {
+ if (multiplicity)
+ {
+ info.idealy_f_ += thick + (multiplicity - 1) * interbeam_f;
+ }
+ info.miny_f_ = info.idealy_f_;
+ info.maxy_f_ = INT_MAX;
+
+ info.idealy_f_ += stem_length;
+ info.miny_f_ += minimum_length;
+
+ /*
+ lowest beam of (UP) beam must never be lower than second staffline
+
+ Hmm, reference (Wanske?)
+
+ Although this (additional) rule is probably correct,
+ I expect that highest beam (UP) should also never be lower
+ than middle staffline, just as normal stems.
+
+ */
+ bool no_extend_b = to_boolean (me->get_grob_property ("no-stem-extend"));
+ if (!grace_b && !no_extend_b)
+ {
+ /* highest beam of (UP) beam must never be lower than middle
+ staffline
+ lowest beam of (UP) beam must never be lower than second staffline
+ */
+ info.miny_f_ =
+ info.miny_f_ >? 0
+ >? (- 2 * half_space - thick
+ + (multiplicity > 0) * thick
+ + interbeam_f * (multiplicity - 1));
+ }
+ }
+ else
+ /* knee */
+ {
+ info.idealy_f_ -= thick;
+ info.maxy_f_ = info.idealy_f_;
+ info.miny_f_ = -INT_MAX;
+
+ info.idealy_f_ -= stem_length;
+ info.maxy_f_ -= minimum_length;
+ }
+
+ info.idealy_f_ = (info.maxy_f_ <? info.idealy_f_) >? info.miny_f_;
+
+ s = beam->get_grob_property ("shorten");
+ if (gh_number_p (s))
+ info.idealy_f_ -= 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.idealy_f_ += interstaff_f;
+ info.miny_f_ += interstaff_f;
+ info.maxy_f_ += interstaff_f ;
+
+ return info;
}
+bool
+Stem::has_interface (Grob*m)
+{
+ return m && m->has_interface (ly_symbol2scm ("stem-interface"));
+}
+
+void
+Stem::set_interface (Grob*me)
+{
+ me->set_interface (ly_symbol2scm ("stem-interface"));
+}
projects / lilypond.git / blobdiff