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"
20 broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0;
24 Item copy ctor. Copy nothing: everything should be a elt property
25 or a special purpose poitner (such as broken_to_drul_[]) */
26 Item::Item (Item const &s)
29 broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
35 Item::breakable_b () const
40 Item * i =dynamic_cast<Item*> (parent_l (X_AXIS));
41 return (i) ? i->breakable_b () : to_boolean (get_elt_property( "breakable"));
47 Score_element *g = parent_l (X_AXIS);
48 return g ? g->line_l () : 0;
53 Item::copy_breakable_items()
55 Drul_array<Item *> new_copies;
59 Score_element * dolly = clone();
60 Item * item_p = dynamic_cast<Item*>(dolly);
61 pscore_l_->line_l_->typeset_element (item_p);
62 new_copies[i] =item_p;
64 while (flip(&i) != LEFT);
65 broken_to_drul_= new_copies;
69 broken_to_drul_[i]->handle_prebroken_dependencies();
70 broken_to_drul_[i]->try_visibility_lambda();
72 while (flip(&i) != LEFT);
76 Item::try_visibility_lambda ()
78 SCM vis = remove_elt_property ("visibility-lambda");
79 if (gh_procedure_p (vis))
81 SCM args = scm_listify (gh_int2scm (break_status_dir ()), SCM_UNDEFINED);
82 SCM result = gh_apply (vis, args);
83 bool trans = gh_scm2bool (gh_car (result));
84 bool empty = gh_scm2bool (gh_cdr (result));
88 set_extent_callback (0, X_AXIS);
89 set_extent_callback (0, Y_AXIS);
92 set_elt_property ("transparent", SCM_BOOL_T);
97 Item::broken_b () const
99 return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT];
110 copy_breakable_items();
111 handle_prebroken_dependencies();
114 Otherwise the broken items won't be pre_process()'ed.
117 if (broken_to_drul_[LEFT])
119 add_dependency (broken_to_drul_[LEFT]);
120 add_dependency (broken_to_drul_[RIGHT]);
123 try_visibility_lambda (); // ugh.
127 Item::do_breakable_col_processing()
133 Item::find_broken_piece (Line_of_score*l) const
136 return (Item*)(this);
140 Score_element *s = find_broken_piece (d);
141 if (s && s->line_l () == l)
144 while (flip (&d) != LEFT);
150 Item::find_broken_piece (Direction d) const
152 Item * me = (Item *) (this);
155 else if (breakable_b ())
158 return dynamic_cast<Item*> (broken_to_drul_[d]);
165 Item::column_l () const
167 return dynamic_cast<Item*> (parent_l (X_AXIS))->column_l ();
171 Item::break_status_dir () const
175 Item * i = dynamic_cast<Item*> (original_l_);
177 return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT;