+/*
+ plet-spanner.cc -- implement Plet_spanner
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
+*/
+
+#include "atom.hh"
+#include "boxes.hh"
+#include "debug.hh"
+#include "lookup.hh"
+#include "molecule.hh"
+#include "p-col.hh"
+#include "paper-def.hh"
+#include "plet-spanner.hh"
+#include "stem.hh"
+#include "text-def.hh"
+
+IMPLEMENT_IS_TYPE_B1 (Plet_spanner,Bow);
+
+Plet_spanner::Plet_spanner ()
+ : Bow ()
+{
+ stem_l_drul_[RIGHT] =0;
+ stem_l_drul_[LEFT] =0;
+
+ tdef_p_ = new Text_def;
+ tdef_p_->align_i_ = CENTER;
+ tdef_p_->style_str_ = "italic";
+}
+
+Plet_spanner::~Plet_spanner ()
+{
+ delete tdef_p_;
+}
+
+Molecule*
+Plet_spanner::brew_molecule_p () const
+{
+ Molecule* mol_p = new Molecule;
+ Real w = width ().length ();
+
+ Real dy_f = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
+
+ // ugh
+ Real nwc_f = (dir_ > 0 ? paper ()->note_width () : 0) * 0.8;
+
+ w += (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]);
+
+ Atom a = paper ()->lookup_l ()->plet (dy_f, w, dir_);
+
+ a.translate (Offset ( (dx_f_drul_[LEFT] + nwc_f), dy_f_drul_[LEFT]));
+ mol_p->add (a);
+
+ Real interline_f = paper ()->interline_f ();
+ Real numy_f = (dir_ > 0 ? 0 : -interline_f / 2);
+ Real numx_f = interline_f / 1.5;
+ Atom num (tdef_p_->get_atom (paper (), CENTER));
+ num.translate (Offset (width ().length ()/ 2 + nwc_f - numx_f
+ + dx_f_drul_[LEFT],
+ dy_f_drul_[LEFT] + dy_f / width ().length () / 2
+ + dir_ * interline_f / 2 + numy_f));
+ mol_p->add (num);
+
+ return mol_p;
+}
+
+void
+Plet_spanner::do_add_processing ()
+{
+ if (! (stem_l_drul_[LEFT] && stem_l_drul_[RIGHT]))
+ warning (_ ("Lonely plet.. "));
+
+ Direction d = LEFT;
+ Drul_array<Stem *> new_stem_drul = stem_l_drul_;
+ do {
+ if (!stem_l_drul_[d])
+ new_stem_drul[d] = stem_l_drul_[(Direction)-d];
+ } while ( (d *= -1) != LEFT);
+ stem_l_drul_ = new_stem_drul;
+}
+
+void
+Plet_spanner::do_post_processing ()
+{
+ Real interline_f = paper ()->interline_f ();
+ assert (stem_l_drul_[LEFT] || stem_l_drul_[RIGHT]);
+
+ Direction d = LEFT;
+ do
+ {
+ dy_f_drul_[d] = .5 * interline_f * (stem_l_drul_[d]
+ ? stem_l_drul_[d]->stem_end_f ()
+ : stem_l_drul_[(Direction)-d]->stem_end_f ());
+ dy_f_drul_[d] += dir_ * interline_f;
+ }
+ while ( (d *= -1) != LEFT);
+}
+
+void
+Plet_spanner::do_substitute_dependency (Score_elem* o, Score_elem* n)
+{
+ Stem* new_l = n ? (Stem*)n->item () : 0;
+ if (o->item () == stem_l_drul_[LEFT])
+ stem_l_drul_[LEFT] = new_l;
+ else if (o->item () == stem_l_drul_[RIGHT])
+ stem_l_drul_[RIGHT] = new_l;
+}
+
+void
+Plet_spanner::set_default_dir ()
+{
+ Real m = (stem_l_drul_[LEFT]->stem_end_f ()
+ + stem_l_drul_[RIGHT]->stem_end_f ()) / 2;
+ dir_ = (m < 0) ? DOWN : UP;
+}
+
+void
+Plet_spanner::set_stem (Direction d, Stem* stem_l)
+{
+ assert (!stem_l_drul_[d]);
+ stem_l_drul_[d] = stem_l;
+ set_bounds (d, stem_l);
+
+ add_dependency (stem_l);
+}
+