+/*
+ stem.cc -- implement Stem
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1996,1997 Han-Wen Nienhuys <hanwen@stack.nl>
+
+ TODO: This is way too hairy
+*/
+
#include "stem.hh"
-#include "dimen.hh"
+#include "dimen.hh"
#include "debug.hh"
#include "paper-def.hh"
-#include "notehead.hh"
+#include "note-head.hh"
#include "lookup.hh"
#include "molecule.hh"
#include "p-col.hh"
#include "misc.hh"
+#include "beam.hh"
+#include "rest.hh"
const int STEMLEN=7;
+IMPLEMENT_IS_TYPE_B1 (Stem,Item);
+
+Stem::Stem ()
+{
+ /*
+ TODO: staff-size
+ */
+ abbrev_flag_i_ = 0;
+ beam_l_ = 0;
+ beams_left_i_ = 0;
+ beams_right_i_ = 0;
+
+ yextent_drul_[DOWN] = yextent_drul_[UP] = 0;
+ flag_i_ = 2;
+ dir_ = CENTER;
+ stem_xdir_ = LEFT;
+ staff_size_i_ = 8;
-Stem::Stem(int c) //, Moment len)
+ beam_gap_i_ = 0;
+}
+
+Interval_t<int>
+Stem::head_positions () const
{
- beams_left = 0;
- beams_right = 0;
- minnote = 1000; // invalid values
- maxnote = -1000;
- bot = top = 0;
- flag = 4;
- dir =0;
- staff_center=c;
- stemlen=0;
- print_flag=true;
- stem_xoffset=0;
+ Interval_t<int> r;
+ for (int i =0; i < head_l_arr_.size (); i++)
+ {
+ int p = head_l_arr_[i]->position_i_;
+ r[BIGGER] = r[BIGGER] >? p;
+ r[SMALLER] = r[SMALLER] <? p;
+ }
+ return r;
}
void
-Stem::do_print() const
+Stem::do_print () const
{
#ifndef NPRINT
- mtor << "flag "<< flag << " print_flag " << print_flag
- << "min,max [" << minnote << ", " << maxnote << "]";
+ DOUT << "flag "<< flag_i_ << "abbrev_flag_i_" << abbrev_flag_i_;
+ if (beam_l_)
+ DOUT << "beamed";
#endif
}
+
+Real
+Stem::stem_length_f () const
+{
+ return yextent_drul_[UP]-yextent_drul_[DOWN] ;
+}
+
+Real
+Stem::stem_start_f () const
+{
+ return yextent_drul_[Direction(-dir_)];
+}
+
+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_ && dir_ * head_positions()[dir_] >= se*dir_)
+ warning (_("Weird stem size; check for narrow beams"));
+
+
+ yextent_drul_[dir_] = se;
+ yextent_drul_[Direction(-dir_)] = head_positions()[-dir_];
+}
- // todo: margins
- if (! ((dir > 0 && se >= maxnote) || (se <= minnote && dir <0)) )
- warning("Weird stem size; check for narrow beams",0);
-
- top = (dir < 0) ? maxnote : se;
- bot = (dir < 0) ? se : minnote;
- flag = dir*abs(flag);
+int
+Stem::type_i () const
+{
+ return head_l_arr_[0]->balltype_i_;
}
void
-Stem::add(Notehead *n)
+Stem::add (Rhythmic_head *n)
{
- assert(status < PRECALCED);
-
- if (n->balltype == 1)
- return;
- int p = n->position;
- if (p < minnote)
- minnote = p;
- if (p > maxnote)
- maxnote = p;
- heads.push(n);
- n->add_dependency(this);
+ n->add_dependency (this); // ?
+ if (n->is_type_b (Note_head::static_name ()))
+ {
+ head_l_arr_.push ((Note_head*)n);
+ }
+ else if (n->is_type_b (Rest::static_name ()))
+ {
+ rest_l_arr_.push ((Rest*)n);
+ }
}
+bool
+Stem::invisible_b () const
+{
+ return (!head_l_arr_.size () ||
+ head_l_arr_[0]->balltype_i_ <= 0);
+}
int
-Stem::get_default_dir()
+Stem::get_center_distance (Direction d)
+{
+ int staff_center = 0;
+ int distance = d*(head_positions()[d] - staff_center);
+ return distance >? 0;
+}
+
+Direction
+Stem::get_default_dir ()
{
- if (dir)
- return dir;
- Real mean = (minnote+maxnote)/2;
- return (mean > staff_center) ? -1: 1;
+ return (get_center_distance (UP) >=
+ get_center_distance (DOWN))
+ ? DOWN
+ : UP;
}
+
void
-Stem::set_default_dir()
+Stem::set_default_dir ()
{
- dir = get_default_dir();
+ dir_ = get_default_dir ();
}
void
-Stem::set_default_stemlen()
-{
- if (!dir)
- set_default_dir();
-
- int stafftop = 2*staff_center;
- stemlen = STEMLEN + (maxnote - minnote);
-
- // uhh... how about non 5-line staffs?
- if (maxnote < -2 && dir == 1){
- int t = staff_center - staff_center/2;
- stemlen = t - minnote +2;
- } else if (minnote > stafftop + 2 && dir == -1) {
- int t = staff_center + staff_center/2;
- stemlen = maxnote -t +2;
- }
+Stem::set_default_stemlen ()
+{
+ Real len = STEMLEN;
+ Real dy = paper ()->interbeam_f ();
+
+ // ugh, should get nice *rule* for this
+ if (abbrev_flag_i_ > 1)
+ len += (abbrev_flag_i_ - 1)* dy / 2;
- assert(stemlen);
-}
+ if (!dir_)
+ set_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;
+
+ if (flag_i_ >= 5)
+ len += 2.0;
+ if (flag_i_ >= 6)
+ len += 1.0;
+
+ set_stemend ((dir_ > 0) ? head_positions()[BIGGER] + len :
+ head_positions()[SMALLER] - len);
+
+
+ if (dir_ * stem_end_f () < 0)
+ {
+ set_stemend (0);
+ }
+}
void
-Stem::set_default_extents()
+Stem::set_default_extents ()
{
- if (minnote > maxnote) {
- warning("Empty stem. Ugh!", 0);
- minnote = -10;
- maxnote = 20;
- }
+ if (!stem_length_f ())
+ set_default_stemlen ();
- if (!stemlen)
- set_default_stemlen();
- set_stemend((dir< 0) ? maxnote-stemlen: minnote +stemlen);
- if (dir > 0){
- stem_xoffset = paper()->note_width()-paper()->rule_thickness();
- } else
- stem_xoffset = 0;
+ if (dir_ == UP)
+ stem_xdir_ = RIGHT;
+ if (invisible_b ())
+ stem_xdir_ = CENTER;
}
+/*
+ TODO
+
+ move into note_column.cc
+
+ */
void
-Stem::set_noteheads()
-{
- if(!heads.size())
- return;
- heads.sort(Notehead::compare);
- heads[0]->extremal = -1;
- heads.top()->extremal = 1;
- int parity=1;
- int lastpos = heads[0]->position;
- for (int i=1; i < heads.size(); i ++) {
- int dy =abs(lastpos- heads[i]->position);
-
- if (dy <= 1) {
- if (parity)
- heads[i]->x_dir = (stem_xoffset>0) ? 1:-1;
- parity = !parity;
- } else
- parity = 0;
- lastpos = heads[i]->position;
+Stem::set_noteheads ()
+{
+ if (!head_l_arr_.size ())
+ return;
+ head_l_arr_.sort (Note_head::compare);
+ if (dir_ < 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_ = (stem_xdir_ == LEFT) ? LEFT : RIGHT;
+ parity = !parity;
+ }
+ else
+ parity = 0;
+ lastpos = head_l_arr_[i]->position_i_;
}
}
void
-Stem::do_pre_processing()
+Stem::do_pre_processing ()
{
- if (bot == top)
- set_default_extents();
- set_noteheads();
+ if (yextent_drul_[DOWN]== yextent_drul_[UP])
+ set_default_extents ();
+ set_noteheads ();
+ flag_i_ = flag_i_;
+ transparent_b_ = invisible_b ();
+ set_empty (invisible_b ());
}
Interval
-Stem::width()const
+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)
+ ; // TODO!
+ else
+ {
+ Paper_def*p= paper ();
+ r = p->lookup_l ()->flag (flag_i_, dir_).dim_.x ();
+ r += note_delta_f ();
+ }
+ return r;
+}
+
+
+
+Molecule
+Stem::abbrev_mol () const
{
- if (!print_flag || abs(flag) <= 4)
- return Interval(0,0); // TODO!
- Paper_def*p= paper();
- Interval r(p->lookup_l()->flag(flag).dim.x);
- r+= stem_xoffset;
- return r;
+ 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 = paper ()->internote_f () / 4;
+
+ if (beam_l_) {
+ // huh?
+ slope = 2 * beam_l_->slope;
+ // ugh, rather calc from Abbreviation_req
+ beams_i = beams_right_i_ >? beams_left_i_;
+ }
+ paper ()->lookup_l ()->beam (slope, 20 PT);
+
+ Molecule beams;
+ Atom a (paper ()->lookup_l ()->beam (slope, w));
+ a.translate (Offset(- w / 2, stem_end_f () - (w / 2 * slope)));
+
+ // 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 return out;
-{
- assert(bot!=top);
-
-
- Paper_def *p =paper();
-
- Real dy = p->internote();
- Symbol ss =p->lookup_l()->stem(bot*dy,top*dy);
-
-
- out = new Molecule(Atom(ss));
-
- if (print_flag&&abs(flag) > 4){
- Symbol fl = p->lookup_l()->flag(flag);
- Molecule m(fl);
- if (flag < -4){
- out->add_bottom(m);
- } else if (flag > 4) {
- out->add_top(m);
- } else
- assert(false);
+Stem::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 head_wid = 0;
+ if (head_l_arr_.size ())
+ head_wid = head_l_arr_[0]->width ().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));
+ }
+
+ if (!beam_l_ &&abs (flag_i_) > 2)
+ {
+ Atom fl = p->lookup_l ()->flag (flag_i_, dir_);
+ fl.translate_axis(stem_y[dir_]*dy, Y_AXIS);
+ mol_p->add(fl);
+ assert (!abbrev_flag_i_);
}
- out->translate(Offset(stem_xoffset,0));
+ if (abbrev_flag_i_)
+ mol_p->add (abbrev_mol ());
+
+ if (head_l_arr_.size())
+ {
+ mol_p->translate_axis (note_delta_f (), X_AXIS);
+ }
+ return mol_p;
}
Real
-Stem::hindex()const
+Stem::note_delta_f () const
{
- return pcol_l_->hpos + stem_xoffset; // hmm. + offset_.x;
+ Real r=0;
+ if (head_l_arr_.size())
+ {
+ Interval head_wid(0, head_l_arr_[0]->width ().length ());
+ Real rule_thick(paper ()->rule_thickness ());
+ Interval stem_wid(-rule_thick/2, rule_thick/2);
+ r = head_wid[stem_xdir_] - stem_wid[stem_xdir_];
+ }
+ return r;
+}
+Real
+Stem::hpos_f () const
+{
+ 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)
+{
+ 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);
+}
projects / lilypond.git / blobdiff