2 item.cc -- implement Item
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "dimension-cache.hh"
10 #include "paper-score.hh"
13 #include "paper-column.hh"
15 #include "lily-guile.hh"
16 #include "line-of-score.hh"
22 broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0;
26 Item copy ctor. Copy nothing: everything should be a elt property
27 or a special purpose pointer (such as broken_to_drul_[]) */
28 Item::Item (Item const &s)
31 broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
37 Item::breakable_b () const
42 Item * i =dynamic_cast<Item*> (parent_l (X_AXIS));
43 return (i) ? i->breakable_b () : to_boolean (get_elt_property ("breakable"));
49 Score_element *g = parent_l (X_AXIS);
50 return g ? g->line_l () : 0;
55 Item::copy_breakable_items()
57 Drul_array<Item *> new_copies;
61 Score_element * dolly = clone();
62 Item * item_p = dynamic_cast<Item*>(dolly);
63 pscore_l_->line_l_->typeset_element (item_p);
64 new_copies[i] =item_p;
66 while (flip(&i) != LEFT);
67 broken_to_drul_= new_copies;
72 Item::broken_b () const
74 return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT];
79 Generate items for begin and end-of line.
82 Item::discretionary_processing()
88 copy_breakable_items();
92 Item::find_broken_piece (Line_of_score*l) const
99 Score_element *s = broken_to_drul_[d];
100 if (s && s->line_l () == l)
103 while (flip (&d) != LEFT);
110 Item::find_prebroken_piece (Direction d) const
112 Item * me = (Item *) (this);
115 return dynamic_cast<Item*> (broken_to_drul_[d]);
119 Item::column_l () const
121 return dynamic_cast<Item*> (parent_l (X_AXIS))->column_l ();
125 Item::break_status_dir () const
129 Item * i = dynamic_cast<Item*> (original_l_);
131 return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT;
138 Item::handle_prebroken_dependencies ()
143 = handle_broken_smobs (original_l_->pointer_alist_,
144 gh_int2scm (break_status_dir ()));
148 Can't do this earlier, because try_visibility_lambda () might set
149 the elt property transparent, which would then be copied.
151 SCM vis = get_elt_property ("visibility-lambda");
152 if (gh_procedure_p (vis))
154 SCM args = scm_listify (gh_int2scm (break_status_dir ()), SCM_UNDEFINED);
155 SCM result = gh_apply (vis, args);
156 bool trans = gh_scm2bool (gh_car (result));
157 bool empty = gh_scm2bool (gh_cdr (result));
161 set_extent_callback (0, X_AXIS);
162 set_extent_callback (0, Y_AXIS);
165 set_elt_property ("transparent", SCM_BOOL_T);