source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "dimension-cache.hh"
+
#include "paper-score.hh"
#include "debug.hh"
#include "paper-column.hh"
#include "spanner.hh"
#include "lily-guile.hh"
+#include "line-of-score.hh"
-Item::Item ()
+Item::Item (SCM s)
+ : Grob (s)
{
broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0;
}
-bool
-Item::breakable_b () 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)
{
- if (original_l_ )
- return false;
-
- Item * i =dynamic_cast<Item*> (parent_l (X_AXIS));
- return (i) ? i->breakable_b () : get_elt_property( breakable_scm_sym) != SCM_BOOL_F;
+ broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
}
-void
-Item::do_print() const
+
+bool
+Item::breakable_b (Grob*me)
{
-}
+ 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"));
+}
-Real
-Item::hpos_f() const
+Paper_column *
+Item::column_l () const
{
- return relative_coordinate (0, X_AXIS);
+ Item *parent = dynamic_cast<Item*> (get_parent (X_AXIS));
+ return parent ? parent->column_l () : 0;
}
Line_of_score *
-Item::line_l() const
+Item::line_l () const
{
- Graphical_element *g = parent_l (X_AXIS);
- if (!g)
- return 0;
- return dynamic_cast<Score_element *> (g)-> line_l ();
+ 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]
- || !breakable_b ())
- return ;
-
Drul_array<Item *> new_copies;
Direction i=LEFT;
do
{
- Score_element * dolly = clone();
- Item * item_p = dynamic_cast<Item*>(dolly);
- 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 ()
-{
- SCM vis = remove_elt_property (visibility_lambda_scm_sym);
- if (vis != SCM_BOOL_F)
- {
- SCM args = scm_listify (gh_int2scm (break_status_dir ()), SCM_UNDEFINED);
- SCM result = gh_apply ( SCM_CDR(vis), args);
- int trans = gh_scm2bool (gh_car (result));
- int empty = gh_scm2bool (gh_cdr (result));
-
- if (empty)
- set_empty (true, X_AXIS, Y_AXIS);
- if (trans)
- set_elt_property (transparent_scm_sym, SCM_BOOL_T);
- }
-}
-void
-Item::do_break ()
+bool
+Item::broken_b () const
{
- 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]);
+ return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT];
}
+
+/*
+ Generate items for begin and end-of line.
+ */
void
-Item::do_breakable_col_processing()
+Item::discretionary_processing ()
{
- if (breakable_b ())
- do_break ();
- else
- try_visibility_lambda ();
+ if (broken_b ())
+ return;
+
+ if (Item::breakable_b (this))
+ copy_breakable_items ();
}
-Item*
-Item::find_prebroken_piece (Line_of_score*l) const
+
+Grob*
+Item::find_broken_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];
+ if (line_l () == l)
+ return (Item*) (this);
+
+ 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 d) const
{
+ Item * me = (Item *) (this);
if (!d)
- return (Item *) (this); // ugh
- else
- return dynamic_cast<Item*> (broken_to_drul_[d]);
+ return me;
+ return dynamic_cast<Item*> (broken_to_drul_[d]);
}
-void
-Item::handle_prebroken_dependencies()
-{
- if (original_l_)
- Score_element::handle_prebroken_dependencies();
-}
-
-bool
-Item::broken_original_b () const
-{
- return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT];
-}
-int
-Item::left_right_compare(Item const *l, Item const *r)
-{
- Paper_column *p1 = l->column_l ();
- Paper_column* p2 = r->column_l ();
- return p1->rank_i () - p2->rank_i ();
-}
-
-Paper_column *
-Item::column_l () const
+Direction
+Item::break_status_dir () const
{
- return dynamic_cast<Item*> (parent_l (X_AXIS))->column_l ();
-}
+ if (original_l_)
+ {
+ Item * i = dynamic_cast<Item*> (original_l_);
-Item::Item (Item const &s)
- : Score_element (s)
-{
- broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
+ return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT;
+ }
+ else
+ return CENTER;
}
-
void
-Item::handle_prebroken_dependents ()
+Item::handle_prebroken_dependencies ()
{
- Item * parent = dynamic_cast<Item*> (parent_l (X_AXIS));
- if (breakable_b () && parent)
+ if (original_l_)
{
- if(!(broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]))
- do_break ();
+ 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.
+
+ TODO:
- Direction d = LEFT;
- do
+ 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))
+ {
+ 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)
{
- Item * broken_self = find_prebroken_piece (d);
- Item * broken_parent = parent->find_prebroken_piece (d);
-
- broken_self->set_parent (broken_parent, X_AXIS);
-
- /*
- ugh. Should do this is after breaking?
- */
- if (!broken_self->parent_l (Y_AXIS))
- {
- Score_element * yparent =dynamic_cast<Score_element*>(parent_l (Y_AXIS));
- Item *yparenti = dynamic_cast<Item*> (yparent);
- Item *broken_yparent = yparenti ?
- yparenti->find_prebroken_piece (d) : 0;
-
- if (!yparent)
- programming_error ("Vertical refpoint lost!");
- else if (yparenti)
- {
- broken_self->set_parent (broken_yparent, Y_AXIS);
- }
- }
+ set_extent_callback (SCM_EOL, X_AXIS);
+ set_extent_callback (SCM_EOL, Y_AXIS);
}
- while ((flip (&d))!=LEFT);
+ else if (trans)
+ set_grob_property ("molecule-callback", SCM_BOOL_T);
}
}
-Direction
-Item::break_status_dir () const
+SCM
+Item::do_derived_mark ()
{
- if (original_l_)
- {
- Item * i = dynamic_cast<Item*> (original_l_);
-
- return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT;
- }
- else
- return CENTER;
+ 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;
}
projects / lilypond.git / blobdiff