source file of the GNU LilyPond music typesetter
- (c) 1996,1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1996, 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
TODO: This is way too hairy
*/
#include "stem.hh"
-#include "dimen.hh"
#include "debug.hh"
#include "paper-def.hh"
#include "note-head.hh"
#include "lookup.hh"
#include "molecule.hh"
-#include "p-col.hh"
+#include "paper-column.hh"
#include "misc.hh"
#include "beam.hh"
#include "rest.hh"
-const int STEMLEN=7;
+void
+Stem::set_direction (Direction d)
+{
+ if (!dir_)
+ warning (_ ("stem direction set already!"));
-IMPLEMENT_IS_TYPE_B1 (Stem,Item);
+ dir_ = d;
-Stem::Stem ()
-{
/*
- TODO: staff-size
- */
- abbrev_flag_i_ = 0;
- beam_l_ = 0;
- beams_left_i_ = 0;
- beams_right_i_ = 0;
+ todo
+ */
+}
+Stem::Stem ()
+{
+ beams_i_drul_[LEFT] = beams_i_drul_[RIGHT] = -1;
yextent_drul_[DOWN] = yextent_drul_[UP] = 0;
flag_i_ = 2;
dir_ = CENTER;
- stem_xdir_ = LEFT;
- staff_size_i_ = 8;
-
- beam_gap_i_ = 0;
+ beam_l_ = 0;
}
Interval_t<int>
Stem::head_positions () const
{
+ /*
+ Mysterious FreeBSD fix by John Galbraith. Somehow, the empty intervals
+ trigger FP exceptions on FreeBSD. Fix: do not return infinity
+
+ */
+ if (!head_l_arr_.size ())
+ {
+ return Interval_t<int> (100,-100);
+ }
+
Interval_t<int> r;
for (int i =0; i < head_l_arr_.size (); i++)
{
- int p = head_l_arr_[i]->position_i_;
+ int p = (int)head_l_arr_[i]->position_f ();
r[BIGGER] = r[BIGGER] >? p;
r[SMALLER] = r[SMALLER] <? p;
}
Stem::do_print () const
{
#ifndef NPRINT
- DOUT << "flag "<< flag_i_ << "abbrev_flag_i_" << abbrev_flag_i_;
+ DEBUG_OUT << "flag "<< flag_i_;
if (beam_l_)
- DOUT << "beamed";
+ DEBUG_OUT << "beamed";
#endif
}
}
Real
-Stem::stem_start_f () const
+Stem::stem_begin_f () const
{
return yextent_drul_[Direction(-dir_)];
}
+Real
+Stem::chord_start_f () const
+{
+ return head_positions()[dir_] * staff_line_leading_f ()/2.0;
+}
+
Real
Stem::stem_end_f () const
{
{
// todo: margins
if (dir_ && dir_ * head_positions()[dir_] >= se*dir_)
- warning (_("Weird stem size; check for narrow beams"));
+ warning (_ ("Weird stem size; check for narrow beams"));
yextent_drul_[dir_] = se;
}
void
-Stem::add (Rhythmic_head *n)
+Stem::add_head (Rhythmic_head *n)
{
+ n->stem_l_ = this;
n->add_dependency (this); // ?
- if (n->is_type_b (Note_head::static_name ()))
+ if (Note_head *nh = dynamic_cast<Note_head *> (n))
{
- head_l_arr_.push ((Note_head*)n);
+ head_l_arr_.push (nh);
}
- else if (n->is_type_b (Rest::static_name ()))
+ else if (Rest *r = dynamic_cast<Rest *> (n))
{
- rest_l_arr_.push ((Rest*)n);
+ rest_l_arr_.push (r);
}
}
}
int
-Stem::get_center_distance (Direction d)
+Stem::get_center_distance (Direction d) const
{
int staff_center = 0;
int distance = d*(head_positions()[d] - staff_center);
}
Direction
-Stem::get_default_dir ()
+Stem::get_default_dir () const
{
- return (get_center_distance (UP) >=
- get_center_distance (DOWN))
- ? DOWN
- : UP;
-}
+ int du = get_center_distance (UP);
+ int dd = get_center_distance (DOWN);
+ if (sign (dd - du))
+ return Direction (sign (dd -du));
-void
-Stem::set_default_dir ()
+ return Direction (int(paper_l ()->get_var ("stem_default_neutral_direction")));
+}
+
+Direction
+Stem::get_dir () const
{
- dir_ = get_default_dir ();
+ return dir_;
}
+
void
Stem::set_default_stemlen ()
{
- Real len = STEMLEN;
- Real dy = paper ()->interbeam_f ();
+ Real length_f = 0.;
+ SCM scm_len = get_elt_property(length_scm_sym);
+ if (scm_len != SCM_BOOL_F)
+ {
+ length_f = gh_scm2double (SCM_CDR(scm_len));
+ }
+ else
+ length_f = paper_l ()->get_var ("stem_length0");
- // ugh, should get nice *rule* for this
- if (abbrev_flag_i_ > 1)
- len += (abbrev_flag_i_ - 1)* dy / 2;
+ bool grace_b = get_elt_property (grace_scm_sym) != SCM_BOOL_F;
+ String type_str = grace_b ? "grace_" : "";
+ Real shorten_f = paper_l ()->get_var (type_str + "forced_stem_shorten0");
if (!dir_)
- set_default_dir ();
+ dir_ = get_default_dir ();
- /* If the stem points in the "wrong" direction, it should be
- shortened, according to [Roush & Gourlay]. Their suggestion to knock off
- a whole staffspace is a bit drastical though.
- */
- else if (dir_ != get_default_dir ())
- len -= 1.0;
+ /*
+ stems in unnatural (forced) direction should be shortened,
+ according to [Roush & Gourlay]
+ */
+ if (((int)chord_start_f ())
+ && (dir_ != get_default_dir ()))
+ length_f -= shorten_f;
if (flag_i_ >= 5)
- len += 2.0;
+ length_f += 2.0;
if (flag_i_ >= 6)
- len += 1.0;
+ length_f += 1.0;
- set_stemend ((dir_ > 0) ? head_positions()[BIGGER] + len :
- head_positions()[SMALLER] - len);
-
+ set_stemend ((dir_ > 0) ? head_positions()[BIGGER] + length_f:
+ head_positions()[SMALLER] - length_f);
- if (dir_ * stem_end_f () < 0)
- {
- set_stemend (0);
- }
+ bool no_extend_b = get_elt_property (no_stem_extend_scm_sym) != SCM_BOOL_F;
+ if (!grace_b && !no_extend_b && (dir_ * stem_end_f () < 0))
+ set_stemend (0);
}
+//xxx
void
Stem::set_default_extents ()
{
if (!stem_length_f ())
set_default_stemlen ();
-
- if (dir_ == UP)
- stem_xdir_ = RIGHT;
- if (invisible_b ())
- stem_xdir_ = CENTER;
}
-/*
- TODO
-
- move into note_column.cc
-
- */
void
Stem::set_noteheads ()
{
if (dir_ < 0)
head_l_arr_.reverse ();
- head_l_arr_[0]->extremal_i_ = -1;
- head_l_arr_.top ()->extremal_i_ = 1;
+ Note_head * beginhead = head_l_arr_[0];
+ beginhead->set_elt_property (extremal_scm_sym, SCM_BOOL_T);
+ if (beginhead != head_l_arr_.top ())
+ head_l_arr_.top ()->set_elt_property (extremal_scm_sym, SCM_BOOL_T);
+
int parity=1;
- int lastpos = head_l_arr_[0]->position_i_;
+ int lastpos = int (beginhead->position_f ());
for (int i=1; i < head_l_arr_.size (); i ++)
{
- int dy =abs (lastpos- head_l_arr_[i]->position_i_);
+ int dy =abs (lastpos- (int)head_l_arr_[i]->position_f ());
if (dy <= 1)
{
if (parity)
- head_l_arr_[i]->x_dir_ = (stem_xdir_ == LEFT) ? LEFT : RIGHT;
+ head_l_arr_[i]->flip_around_stem (dir_);
parity = !parity;
}
else
parity = 1;
- lastpos = head_l_arr_[i]->position_i_;
+ lastpos = int (head_l_arr_[i]->position_f ());
}
}
if (yextent_drul_[DOWN]== yextent_drul_[UP])
set_default_extents ();
set_noteheads ();
- flag_i_ = flag_i_;
- transparent_b_ = invisible_b ();
- set_empty (invisible_b ());
+
+ if (invisible_b ())
+ {
+ set_elt_property (transparent_scm_sym, SCM_BOOL_T);
+ }
+ set_empty (invisible_b (), X_AXIS, Y_AXIS);
+ set_spacing_hints ();
}
+
+/**
+ 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
+ */
+
+void
+Stem::set_spacing_hints ()
+{
+ if (!invisible_b ())
+ {
+ SCM scmdir = gh_int2scm (dir_);
+ SCM dirlist = column_l ()->get_elt_property (dir_list_scm_sym);
+ if (dirlist == SCM_BOOL_F)
+ dirlist = SCM_EOL;
+ else
+ dirlist = SCM_CDR (dirlist);
+
+ if (scm_sloppy_memq (scmdir, dirlist) == SCM_EOL)
+ {
+ dirlist = gh_cons (scmdir, dirlist);
+ column_l ()->set_elt_property (dir_list_scm_sym, dirlist);
+ }
+ }
+}
+
+Molecule
+Stem::flag () const
+{
+ String style;
+ SCM st = get_elt_property (style_scm_sym);
+ if ( st != SCM_BOOL_F)
+ {
+ st = SCM_CDR(st);
+ style = ly_scm2string (st);
+ }
+
+ 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));
+ return m;
+}
+
Interval
Stem::do_width () const
{
Interval r (0, 0);
- if (abbrev_flag_i_)
- {
- r = abbrev_mol ().extent ().x ();
- }
- else if (beam_l_ || abs (flag_i_) <= 2)
+ if (beam_l_ || abs (flag_i_) <= 2)
; // TODO!
else
{
- Paper_def*p= paper ();
- r = p->lookup_l ()->flag (flag_i_, dir_).dim_.x ();
+ r = flag ().dim_.x ();
r += note_delta_f ();
}
return r;
-Molecule
-Stem::abbrev_mol () const
-{
- Real dy = paper ()->interbeam_f ();
- Real w = 1.5 * paper ()->lookup_l ()->ball (2).dim_.x ().length ();
- Real beamdy = paper ()->interline_f () / 2;
-
- int beams_i = 0;
- Real slope_f = paper ()->internote_f () / 4;
-
- if (beam_l_) {
- // huh?
- slope_f = 2 * beam_l_->slope_f;
- // ugh, rather calc from Abbreviation_req
- beams_i = beams_right_i_ >? beams_left_i_;
- }
- paper ()->lookup_l ()->beam (slope_f, 20 PT);
-
- Molecule beams;
- Atom a (paper ()->lookup_l ()->beam (slope_f, w));
- a.translate (Offset(- w / 2, stem_end_f () - (w / 2 * slope_f)));
-
- // ugh
- if (!beams_i)
- a.translate_axis (dy + beamdy - dir_ * dy, Y_AXIS);
- else
- a.translate_axis (2 * beamdy - dir_ * (beamdy - dy), Y_AXIS);
-
- for (int i = 0; i < abbrev_flag_i_; i++)
- {
- Atom b (a);
- b.translate_axis (-dir_ * dy * (beams_i + i), Y_AXIS);
- beams.add (b);
- }
-
- return beams;
-}
const Real ANGLE = 20* (2.0*M_PI/360.0); // ugh!
Molecule*
-Stem::brew_molecule_p () const
+Stem::do_brew_molecule_p () const
{
Molecule *mol_p =new Molecule;
- Paper_def *p =paper ();
Drul_array<Real> stem_y = yextent_drul_;
- Real dy = p->internote_f ();
-
+ Real dy = staff_line_leading_f ()/2.0;
Real head_wid = 0;
if (head_l_arr_.size ())
- head_wid = head_l_arr_[0]->width ().length ();
+ head_wid = head_l_arr_[0]->extent (X_AXIS).length ();
stem_y[Direction(-dir_)] += dir_ * head_wid * tan(ANGLE)/(2*dy);
if (!invisible_b ())
{
- Atom ss =p->lookup_l ()->stem (stem_y[DOWN]*dy,
- stem_y[UP]*dy);
- mol_p->add (Atom (ss));
+ 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);
}
- if (!beam_l_ &&abs (flag_i_) > 2)
+ if (!beam_l_ && abs (flag_i_) > 2)
{
- Atom fl = p->lookup_l ()->flag (flag_i_, dir_);
+ Molecule fl = flag ();
fl.translate_axis(stem_y[dir_]*dy, Y_AXIS);
- mol_p->add(fl);
- assert (!abbrev_flag_i_);
+ mol_p->add_molecule (fl);
}
- if (abbrev_flag_i_)
- mol_p->add (abbrev_mol ());
-
if (head_l_arr_.size())
{
mol_p->translate_axis (note_delta_f (), X_AXIS);
Stem::note_delta_f () const
{
Real r=0;
- if (head_l_arr_.size() && stem_xdir_ != CENTER)
+ if (head_l_arr_.size())
{
- Interval head_wid(0, head_l_arr_[0]->width ().length ());
- Real rule_thick(paper ()->rule_thickness ());
+ Interval head_wid(0, head_l_arr_[0]->extent (X_AXIS).length ());
+ Real rule_thick = paper_l ()->get_var ("stemthickness");
+
Interval stem_wid(-rule_thick/2, rule_thick/2);
- r = head_wid[stem_xdir_] - stem_wid[stem_xdir_];
+ if (dir_ == CENTER)
+ r = head_wid.center ();
+ else
+ r = head_wid[dir_] - stem_wid[dir_];
}
return r;
}
+
Real
Stem::hpos_f () const
{
- return note_delta_f () +Item::hpos_f ();
+ return note_delta_f () + Item::hpos_f ();
}
-/*
- TODO: head_l_arr_/rest_l_arr_ in do_substitute_dependent ()
- */
void
- Stem::do_substitute_dependency (Score_elem*o,Score_elem*n)
+Stem::do_substitute_element_pointer (Score_element*o,Score_element*n)
{
- Item * o_l = o->item ();
- Item * n_l = n? n->item () : 0;
- head_l_arr_.substitute ((Note_head*)o_l, (Note_head*)n_l);
- rest_l_arr_.substitute ((Rest*)o_l, (Rest*)n_l);
+ 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))
+ {
+ if (b == beam_l_)
+ beam_l_ = dynamic_cast<Beam*> (n);
+ }
+ Staff_symbol_referencer::do_substitute_element_pointer (o,n);
}
projects / lilypond.git / blobdiff