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;
-
-int
-Stem::min_head_i()const
+void
+Stem::set_direction (Direction d)
{
- int m = 1000;
- for (int i =0; i < head_l_arr_.size(); i++)
- m = m <? head_l_arr_[i]->position_i_;
- return m;
+ if (!dir_)
+ warning (_ ("stem direction set already!"));
+
+ dir_ = d;
+
+ /*
+ todo
+ */
}
-int
-Stem::max_head_i() const
+Stem::Stem ()
{
- int m = -1000;
- for (int i =0; i < head_l_arr_.size(); i++)
- m = m >? head_l_arr_[i]->position_i_;
- return m;
-
+ beams_i_drul_[LEFT] = beams_i_drul_[RIGHT] = -1;
+ yextent_drul_[DOWN] = yextent_drul_[UP] = 0;
+ flag_i_ = 2;
+ dir_ = CENTER;
+ beam_l_ = 0;
}
-Stem::Stem(int c)
+Interval_t<int>
+Stem::head_positions () const
{
- beams_left_i_ = 0;
- beams_right_i_ = 0;
-
- stem_bottom_f_ = stem_top_f_ = 0;
- flag_i_ = 4;
- dir_i_ =0;
- staff_size_i_ = c;
+ /*
+ 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);
+ }
- print_flag_b_=true;
- stem_xoffset_f_ =0;
+ Interval_t<int> r;
+ for (int i =0; i < head_l_arr_.size (); i++)
+ {
+ int p = (int)head_l_arr_[i]->position_f ();
+ r[BIGGER] = r[BIGGER] >? p;
+ r[SMALLER] = r[SMALLER] <? p;
+ }
+ return r;
}
-IMPLEMENT_STATIC_NAME(Stem);
-IMPLEMENT_IS_TYPE_B1(Stem,Item);
-
void
-Stem::do_print() const
+Stem::do_print () const
{
#ifndef NPRINT
- mtor << "flag "<< flag_i_ << " print_flag_b_ " << print_flag_b_;
-
+ DEBUG_OUT << "flag "<< flag_i_;
+ if (beam_l_)
+ DEBUG_OUT << "beamed";
#endif
}
-Real
-Stem::stem_length_f()const
+Real
+Stem::stem_length_f () const
{
- return stem_top_f_-stem_bottom_f_ ;
+ return yextent_drul_[UP]-yextent_drul_[DOWN] ;
}
Real
-Stem::stem_start_f()const
+Stem::stem_begin_f () const
{
- return (dir_i_ < 0)? stem_top_f_ : stem_bottom_f_;
+ return yextent_drul_[Direction(-dir_)];
}
Real
-Stem::stem_end_f() const
+Stem::chord_start_f () const
{
- return (dir_i_ < 0)? stem_bottom_f_ : stem_top_f_;
+ return head_positions()[dir_] * staff_line_leading_f ()/2.0;
}
+Real
+Stem::stem_end_f () const
+{
+ return yextent_drul_[dir_];
+}
void
-Stem::set_stemend(Real se)
+Stem::set_stemend (Real se)
{
- // todo: margins
- if (! ((dir_i_ > 0 && se >= max_head_i()) ||
- (se <= min_head_i() && dir_i_ <0)) )
- warning("Weird stem size; check for narrow beams");
+ // todo: margins
+ if (dir_ && dir_ * head_positions()[dir_] >= se*dir_)
+ warning (_ ("Weird stem size; check for narrow beams"));
- stem_top_f_ = (dir_i_ < 0) ? max_head_i() : se;
- stem_bottom_f_ = (dir_i_ < 0) ? se : min_head_i();
+
+ yextent_drul_[dir_] = se;
+ yextent_drul_[Direction(-dir_)] = head_positions()[-dir_];
+}
+
+int
+Stem::type_i () const
+{
+ return head_l_arr_[0]->balltype_i_;
}
void
-Stem::add(Note_head *n)
+Stem::add_head (Rhythmic_head *n)
{
- n->add_dependency(this);
- if (n->rest_b_) {
- rest_l_arr_.push(n);
- } else if (n->balltype_i_ == 1) {
- whole_l_arr_.push(n);
- return;
- } else{
- head_l_arr_.push(n);
+ n->stem_l_ = this;
+ n->add_dependency (this); // ?
+ if (Note_head *nh = dynamic_cast<Note_head *> (n))
+ {
+ head_l_arr_.push (nh);
+ }
+ else if (Rest *r = dynamic_cast<Rest *> (n))
+ {
+ rest_l_arr_.push (r);
}
}
bool
-Stem::invisible_b()const
+Stem::invisible_b () const
{
- return !head_l_arr_.size();
+ return (!head_l_arr_.size () ||
+ head_l_arr_[0]->balltype_i_ <= 0);
}
-// if dir_i_ is set we return fake values.
-
int
-Stem::get_center_distance_from_top()
+Stem::get_center_distance (Direction d) const
{
- if (dir_i_)
- return (dir_i_ > 0) ? 0 : 1;
-
- int staff_center = staff_size_i_ / 2;
- int max = max_head_i() - staff_center;
- return max >? 0;
+ int staff_center = 0;
+ int distance = d*(head_positions()[d] - staff_center);
+ return distance >? 0;
}
-// if dir_i_ is set we return fake values.
-int
-Stem::get_center_distance_from_bottom()
+Direction
+Stem::get_default_dir () const
{
- if (dir_i_)
- return (dir_i_ > 0) ? 1 : 0;
+ int du = get_center_distance (UP);
+ int dd = get_center_distance (DOWN);
+
+ if (sign (dd - du))
+ return Direction (sign (dd -du));
- int staff_center = staff_size_i_ / 2;
- int min = staff_center - min_head_i();
- return min >? 0;
+ return Direction (int(paper_l ()->get_var ("stem_default_neutral_direction")));
}
-int
-Stem::get_default_dir()
+Direction
+Stem::get_dir () const
{
- if (dir_i_)
- return dir_i_;
- return (get_center_distance_from_top() >=
- get_center_distance_from_bottom()) ? -1 : 1;
+ return dir_;
}
void
-Stem::set_default_dir()
+Stem::set_default_stemlen ()
{
- dir_i_ = get_default_dir();
+ 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");
+
+ 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_)
+ dir_ = get_default_dir ();
+
+ /*
+ 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)
+ length_f += 2.0;
+ if (flag_i_ >= 6)
+ length_f += 1.0;
+
+ 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_sym) != SCM_BOOL_F;
+ if (!grace_b && !no_extend_b && (dir_ * stem_end_f () < 0))
+ set_stemend (0);
}
+//xxx
void
-Stem::set_default_stemlen()
+Stem::set_default_extents ()
{
- if (!dir_i_)
- set_default_dir();
-
-
- // ugh... how about non 5-line staffs?
- if ((max_head_i() < -2 && dir_i_ == 1 )
- ||(min_head_i() > staff_size_i_ && dir_i_ == -1) ){
- set_stemend( staff_size_i_ /2 -1 );
- } else {
- set_stemend( (dir_i_ > 0) ? max_head_i() + STEMLEN :
- min_head_i() - STEMLEN);
+ if (!stem_length_f ())
+ set_default_stemlen ();
- }
}
-
void
-Stem::set_default_extents()
+Stem::set_noteheads ()
{
- if (!stem_length_f())
- set_default_stemlen();
-
- set_stemend((dir_i_< 0) ?
- max_head_i()-stem_length_f(): min_head_i() +stem_length_f());
- if (dir_i_ > 0){
- stem_xoffset_f_ = paper()->note_width()-paper()->rule_thickness();
- } else
- stem_xoffset_f_ = 0;
-}
-
-/*
- TODO
+ if (!head_l_arr_.size ())
+ 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_sym, SCM_BOOL_T);
+ if (beginhead != head_l_arr_.top ())
+ head_l_arr_.top ()->set_elt_property (extremal_scm_sym, SCM_BOOL_T);
- move into note_column.cc
+ int parity=1;
+ int lastpos = int (beginhead->position_f ());
+ for (int i=1; i < head_l_arr_.size (); i ++)
+ {
+ int dy =abs (lastpos- (int)head_l_arr_[i]->position_f ());
+
+ if (dy <= 1)
+ {
+ if (parity)
+ head_l_arr_[i]->flip_around_stem (dir_);
+ parity = !parity;
+ }
+ else
+ parity = 1;
+ lastpos = int (head_l_arr_[i]->position_f ());
+ }
+}
- */
void
-Stem::set_noteheads()
+Stem::do_pre_processing ()
{
- if(!head_l_arr_.size())
- return;
- head_l_arr_.sort(Note_head::compare);
- if (dir_i_ < 0)
- head_l_arr_.reverse();
-
- head_l_arr_[0]->extremal_i_ = -1;
- head_l_arr_.top()->extremal_i_ = 1;
- int parity=1;
- int lastpos = head_l_arr_[0]->position_i_;
- for (int i=1; i < head_l_arr_.size(); i ++) {
- int dy =abs(lastpos- head_l_arr_[i]->position_i_);
-
- if (dy <= 1) {
- if (parity)
- head_l_arr_[i]->x_dir_i_ = (stem_xoffset_f_>0) ? 1:-1;
- parity = !parity;
- } else
- parity = 0;
- lastpos = head_l_arr_[i]->position_i_;
+ if (yextent_drul_[DOWN]== yextent_drul_[UP])
+ set_default_extents ();
+ set_noteheads ();
+
+ 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::do_pre_processing()
+Stem::set_spacing_hints ()
{
- if (stem_bottom_f_== stem_top_f_)
- set_default_extents();
- set_noteheads();
- flag_i_ = dir_i_*abs(flag_i_);
- transparent_b_ = invisible_b();
- empty_b_ = invisible_b();
+ 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
+Stem::do_width () const
{
- if (!print_flag_b_ || abs(flag_i_) <= 4)
- return Interval(0,0); // TODO!
- Paper_def*p= paper();
- Interval r(p->lookup_l()->flag(flag_i_).dim.x);
- r+= stem_xoffset_f_;
- return r;
+ Interval r (0, 0);
+ if (beam_l_ || abs (flag_i_) <= 2)
+ ; // TODO!
+ else
+ {
+ r = flag ().dim_.x ();
+ r += note_delta_f ();
+ }
+ return r;
}
+
+
+
+const Real ANGLE = 20* (2.0*M_PI/360.0); // ugh!
+
Molecule*
-Stem::brew_molecule_p()const
+Stem::do_brew_molecule_p () const
{
- Molecule *out =0;
-
- Real bot = stem_bottom_f_;
- Real top = stem_top_f_;
-
- assert(bot!=top);
-
- Paper_def *p =paper();
-
- Real dy = p->internote_f();
- Symbol ss =p->lookup_l()->stem(bot*dy,top*dy);
-
- out = new Molecule(Atom(ss));
-
- if (print_flag_b_&&abs(flag_i_) > 4){
- Symbol fl = p->lookup_l()->flag(flag_i_);
- Molecule m(fl);
- if (flag_i_ < -4){
- out->add_bottom(m);
- } else if (flag_i_ > 4) {
- out->add_top(m);
- } else
- assert(false);
+ 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);
+
+ if (!invisible_b ())
+ {
+ 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);
}
- out->translate_x(stem_xoffset_f_);
- return out;
+ if (!beam_l_ && abs (flag_i_) > 2)
+ {
+ Molecule fl = flag ();
+ fl.translate_axis(stem_y[dir_]*dy, Y_AXIS);
+ mol_p->add_molecule (fl);
+ }
+
+ if (head_l_arr_.size())
+ {
+ mol_p->translate_axis (note_delta_f (), X_AXIS);
+ }
+ return mol_p;
}
Real
-Stem::hpos_f()const
+Stem::note_delta_f () const
{
- return Item::hpos_f() + stem_xoffset_f_;
+ Real r=0;
+ if (head_l_arr_.size())
+ {
+ 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);
+ 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 ();
+}
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;
- whole_l_arr_.substitute((Note_head*)o_l, (Note_head*)n_l);
- head_l_arr_.substitute((Note_head*)o_l, (Note_head*)n_l);
- rest_l_arr_.substitute((Note_head*)o_l, (Note_head*)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);
}
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