source file of the GNU LilyPond music typesetter
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "p-score.hh"
+
+#include "paper-score.hh"
#include "debug.hh"
#include "item.hh"
-#include "p-col.hh"
+#include "paper-column.hh"
#include "spanner.hh"
+#include "lily-guile.hh"
+#include "system.hh"
+#include "group-interface.hh"
-Item::Item ()
+Item::Item (SCM s)
+ : Grob (s)
{
- unbroken_original_l_ =0;
- break_priority_i_ = 0;
- breakable_b_ = false;
- break_status_dir_ = CENTER;
broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0;
+ Group_interface::add_thing (this, ly_symbol2scm ("interfaces"), ly_symbol2scm ("item-interface"));
+
}
-void
-Item::do_print() const
+/**
+ Item copy ctor. Copy nothing: everything should be a elt property
+ or a special purpose pointer (such as broken_to_drul_[]) */
+Item::Item (Item const &s)
+ : Grob (s)
{
-#ifndef NPRINT
- DOUT << "breakable_b_: " << breakable_b_ <<
- " break_status_dir_: " << break_status_dir_;
-#endif
+ broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
}
-Real
-Item::hpos_f() const
+bool
+Item::breakable_b (Grob*me)
{
- return absolute_coordinate (X_AXIS);
+ if (me->original_l_)
+ return false;
+
+ if (!dynamic_cast<Item*> (me))
+ programming_error ("only items can be breakable.");
+
+ Item * i =dynamic_cast<Item*> (me->get_parent (X_AXIS));
+ return (i) ? Item::breakable_b (i) : to_boolean (me->get_grob_property ("breakable"));
}
-Line_of_score *
-Item::line_l() const
+Paper_column *
+Item::column_l () const
{
- Graphical_element *g = parent_l (X_AXIS);
- if (!g)
- return 0;
- return dynamic_cast <Score_element *> (g)-> line_l ();
+ Item *parent = dynamic_cast<Item*> (get_parent (X_AXIS));
+ return parent ? parent->column_l () : 0;
}
-Direction
-Item::break_status_dir() const
+System *
+Item::line_l () const
{
- return break_status_dir_;
+ Grob *g = get_parent (X_AXIS);
+ return g ? g->line_l () : 0;
}
+
void
-Item::copy_breakable_items()
+Item::copy_breakable_items ()
{
- if (broken_to_drul_[LEFT] || broken_to_drul_[RIGHT])
- return;
Drul_array<Item *> new_copies;
Direction i=LEFT;
do
{
- Score_element * dolly = clone();
- Item * item_p = dynamic_cast<Item*>(dolly);
-
- item_p->break_status_dir_ = i;
- pscore_l_->typeset_element (item_p);
+ Grob * dolly = clone ();
+ Item * item_p = dynamic_cast<Item*> (dolly);
+ pscore_l_->line_l_->typeset_grob (item_p);
new_copies[i] =item_p;
}
- while (flip(&i) != LEFT);
+ while (flip (&i) != LEFT);
broken_to_drul_= new_copies;
-
- do
- {
- broken_to_drul_[i]->handle_prebroken_dependencies();
- broken_to_drul_[i]->try_visibility_lambda();
- }
- while (flip(&i) != LEFT);
- try_visibility_lambda ();
}
-void
-Item::try_visibility_lambda ()
+
+bool
+Item::broken_b () const
{
- if (visibility_lambda_)
- {
- SCM args = scm_listify (gh_int2scm (break_status_dir_), SCM_UNDEFINED);
- SCM result = gh_apply (visibility_lambda_, args);
- int trans = gh_scm2bool (gh_car (result));
- int empty = gh_scm2bool (gh_cdr (result));
-
- if (empty)
- set_empty (true);
- if (trans)
- transparent_b_ = true;
- }
+ return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT];
}
+
+/*
+ Generate items for begin and end-of line.
+ */
void
-Item::do_break ()
+Item::discretionary_processing ()
{
- copy_breakable_items();
- handle_prebroken_dependencies();
-
- /*
- Otherwise the broken items won't be pre_process()'ed.
- */
- add_dependency (broken_to_drul_[LEFT]);
- add_dependency (broken_to_drul_[RIGHT]);
+ if (broken_b ())
+ return;
+ if (Item::breakable_b (this))
+ copy_breakable_items ();
}
-void
-Item::do_breakable_col_processing()
+Grob*
+Item::find_broken_piece (System*l) const
{
- if (breakable_b_)
- do_break ();
+ if (line_l () == l)
+ return (Item*) (this);
-}
-Item*
-Item::find_prebroken_piece (Line_of_score*l) const
-{
- if (line_l() == l)
- return (Item*)this;
- else if (broken_to_drul_[LEFT] && broken_to_drul_[LEFT]->line_l() == l)
- return broken_to_drul_[LEFT];
- else if (broken_to_drul_[RIGHT] && broken_to_drul_[RIGHT]->line_l() == l)
- return broken_to_drul_[RIGHT];
+ Direction d = LEFT;
+ do {
+ Grob *s = broken_to_drul_[d];
+ if (s && s->line_l () == l)
+ return s;
+ }
+ while (flip (&d) != LEFT);
return 0;
}
+
Item*
-Item::find_prebroken_piece (Direction breakstatus) const
+Item::find_prebroken_piece (Direction d) const
{
- if (!breakstatus)
- return (Item *) this; // ugh
- else
- return (Item*) broken_to_drul_[breakstatus];
+ Item * me = (Item *) (this);
+ if (!d)
+ return me;
+ return dynamic_cast<Item*> (broken_to_drul_[d]);
}
-void
-Item::handle_prebroken_dependencies()
-{
- if (breakable_b_)
- Score_element::handle_prebroken_dependencies();
-}
-int
-Item::left_right_compare(Item const *l, Item const *r)
+Direction
+Item::break_status_dir () const
{
- Paper_column *p1 = l->column_l ();
- Paper_column* p2 = r->column_l ();
- return p1->rank_i () - p2->rank_i ();
-}
-
+ if (original_l_)
+ {
+ Item * i = dynamic_cast<Item*> (original_l_);
-bool
-Item::linked_b() const
-{
- return Score_element::linked_b() || attached_span_l_arr_.size();
+ return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT;
+ }
+ else
+ return CENTER;
}
void
-Item::do_junk_links()
+Item::handle_prebroken_dependencies ()
{
- attached_span_l_arr_.set_size(0);
-}
+ if (original_l_)
+ {
+ mutable_property_alist_
+ = handle_broken_grobs(original_l_->mutable_property_alist_,
+ gh_int2scm (break_status_dir ()));
+ }
+
+ /*
+ Can't do this earlier, because try_visibility_lambda () might set
+ the elt property transparent, which would then be copied.
-void
-Item::do_unlink()
-{
- Link_array<Spanner> attached=attached_span_l_arr_;
- for (int i=0; i < attached.size (); i++)
+ TODO:
+
+ handle visibility-lambda the item itself iso. breakstatusdir, so
+ the function can do more complicated things.
+
+ */
+ SCM vis = get_grob_property ("visibility-lambda");
+ if (gh_procedure_p (vis))
{
- Spanner *s= attached[i];
-
- Direction d= LEFT;
- do {
- if (s->spanned_drul_[d] == this)
- s->set_bounds (d, 0);
- if (unbroken_original_l_
- && unbroken_original_l_-> broken_to_drul_[d] == this)
- unbroken_original_l_->broken_to_drul_[d] = 0;
- } while (flip (&d) != LEFT);
+ SCM args = scm_list_n (gh_int2scm (break_status_dir ()), SCM_UNDEFINED);
+ SCM result = gh_apply (vis, args);
+ bool trans = gh_scm2bool (ly_car (result));
+ bool empty = gh_scm2bool (ly_cdr (result));
+
+ if (empty && trans)
+ suicide ();
+ else if (empty)
+ {
+ set_extent (SCM_EOL, X_AXIS);
+ set_extent (SCM_EOL, Y_AXIS);
+ }
+ else if (trans)
+ set_grob_property ("molecule-callback", SCM_EOL);
}
- assert (!attached_span_l_arr_.size ());
- unbroken_original_l_ =0;
}
-Paper_column *
-Item::column_l () const
+SCM
+Item::do_derived_mark ()
{
- return dynamic_cast<Item*> (parent_l (X_AXIS))->column_l ();
+ if (broken_to_drul_[LEFT])
+ scm_gc_mark (broken_to_drul_[LEFT]->self_scm ());
+ if (broken_to_drul_[RIGHT])
+ scm_gc_mark (broken_to_drul_[RIGHT]->self_scm ());
+ return SCM_EOL;
}
-Item::Item (Item const &s)
- : Score_element (s)
+Item*
+unsmob_item (SCM s )
{
- unbroken_original_l_ = &s;
- /* do not copy attached_span_l_arr_ */
- breakable_b_ = s.breakable_b_;
- visibility_lambda_ = s.visibility_lambda_;
- broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
- break_status_dir_ = s.break_status_dir_;
- break_priority_i_ = s.break_priority_i_;
+ return dynamic_cast<Item*> (unsmob_grob (s));
}
-void
-Item::handle_prebroken_dependents ()
-{
- Dimension_cache * dim = dim_cache_[X_AXIS].parent_l_;
- if (!dim)
- return;
-
- Item * parent = dynamic_cast<Item*> (dim->element_l ());
- if (parent && parent->broken_to_drul_[LEFT])
- {
- if(!(broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]))
- do_break ();
-
- Direction d = LEFT;
- do
- {
- broken_to_drul_[d]->dim_cache_[X_AXIS].parent_l_ =
- &parent->broken_to_drul_[d]->dim_cache_[X_AXIS];
- parent->broken_to_drul_[d]->add_dependency (broken_to_drul_[d]);
- }
- while ((flip (&d))!=LEFT);
- }
-}
+ADD_INTERFACE(Item,
+ "item-interface",
+ "",
+ "no-spacing-rods visibility-lambda breakable")