source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "dimension-cache.hh"
+
#include "paper-score.hh"
-#include "debug.hh"
+#include "warn.hh"
#include "item.hh"
#include "paper-column.hh"
#include "spanner.hh"
#include "lily-guile.hh"
-#include "line-of-score.hh"
+#include "system.hh"
+#include "group-interface.hh"
-Item::Item ()
+Item::Item (SCM s)
+ : Grob (s)
{
broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0;
+ Group_interface::add_thing (this, ly_symbol2scm ("interfaces"), ly_symbol2scm ("item-interface"));
}
/**
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)
- : Score_element (s)
+ : Grob (s)
{
broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
}
-
bool
-Item::breakable_b () const
+Item::breakable_b (Grob*me)
{
- if (original_l_ )
+ if (me->original_)
return false;
+
+ if (!dynamic_cast<Item*> (me))
+ me->programming_error ("only items can be breakable.");
- Item * i =dynamic_cast<Item*> (parent_l (X_AXIS));
- return (i) ? i->breakable_b () : to_boolean (get_elt_property ("breakable"));
+ Item * i =dynamic_cast<Item*> (me->get_parent (X_AXIS));
+ return (i) ? Item::breakable_b (i) : to_boolean (me->get_grob_property ("breakable"));
+}
+
+Paper_column *
+Item::get_column () const
+{
+ Item *parent = dynamic_cast<Item*> (get_parent (X_AXIS));
+ return parent ? parent->get_column () : 0;
}
-Line_of_score *
-Item::line_l() const
+System *
+Item::get_system () const
{
- Score_element *g = parent_l (X_AXIS);
- return g ? g->line_l () : 0;
+ Grob *g = get_parent (X_AXIS);
+ return g ? g->get_system () : 0;
}
void
-Item::copy_breakable_items()
+Item::copy_breakable_items ()
{
Drul_array<Item *> new_copies;
Direction i=LEFT;
do
{
- Score_element * dolly = clone();
- Item * item_p = dynamic_cast<Item*>(dolly);
- pscore_l_->line_l_->typeset_element (item_p);
- new_copies[i] =item_p;
+ Grob * dolly = clone ();
+ Item * item = dynamic_cast<Item*> (dolly);
+ pscore_->system_->typeset_grob (item);
+ new_copies[i] =item;
}
- while (flip(&i) != LEFT);
+ while (flip (&i) != LEFT);
broken_to_drul_= new_copies;
}
Generate items for begin and end-of line.
*/
void
-Item::discretionary_processing()
+Item::discretionary_processing ()
{
if (broken_b ())
return;
- if (breakable_b ())
- copy_breakable_items();
+ if (Item::breakable_b (this))
+ copy_breakable_items ();
}
-Score_element*
-Item::find_broken_piece (Line_of_score*l) const
+Grob*
+Item::find_broken_piece (System*l) const
{
- if (line_l() == l)
- return (Item*)(this);
+ if (get_system () == l)
+ return (Item*) (this);
Direction d = LEFT;
do {
- Score_element *s = broken_to_drul_[d];
- if (s && s->line_l () == l)
+ Grob *s = broken_to_drul_[d];
+ if (s && s->get_system () == l)
return s;
}
while (flip (&d) != LEFT);
return dynamic_cast<Item*> (broken_to_drul_[d]);
}
-Paper_column *
-Item::column_l () const
-{
- return dynamic_cast<Item*> (parent_l (X_AXIS))->column_l ();
-}
Direction
Item::break_status_dir () const
{
- if (original_l_)
+ if (original_)
{
- Item * i = dynamic_cast<Item*> (original_l_);
+ Item * i = dynamic_cast<Item*> (original_);
return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT;
}
void
Item::handle_prebroken_dependencies ()
{
- if (original_l_)
- {
- element_property_alist_
- = handle_broken_smobs (original_l_->element_property_alist_,
- gh_int2scm (break_status_dir ()));
- }
+ Grob::handle_prebroken_dependencies ();
/*
Can't do this earlier, because try_visibility_lambda () might set
the elt property transparent, which would then be copied.
+
+ TODO:
+
+ give the item to break-visibility itself, so the function can do
+ more complicated things.
*/
- SCM vis = remove_elt_property ("visibility-lambda");
+ SCM vis = get_grob_property ("break-visibility");
if (gh_procedure_p (vis))
{
- SCM args = scm_listify (gh_int2scm (break_status_dir ()), SCM_UNDEFINED);
+ SCM args = scm_list_n (gh_int2scm (break_status_dir ()), SCM_UNDEFINED);
SCM result = gh_apply (vis, args);
- bool trans = gh_scm2bool (gh_car (result));
- bool empty = gh_scm2bool (gh_cdr (result));
-
- if (empty)
+ bool trans = gh_scm2bool (ly_car (result));
+ bool empty = gh_scm2bool (ly_cdr (result));
+
+ if (empty && trans)
+ suicide ();
+ else if (empty)
{
- set_extent_callback (0, X_AXIS);
- set_extent_callback (0, Y_AXIS);
+ set_extent (SCM_EOL, X_AXIS);
+ set_extent (SCM_EOL, Y_AXIS);
}
- if (trans)
- set_elt_property ("transparent", SCM_BOOL_T);
+ else if (trans)
+ set_grob_property ("molecule-callback", SCM_EOL);
}
}
+
+SCM
+Item::do_derived_mark ()const
+{
+ 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*
+unsmob_item (SCM s )
+{
+ return dynamic_cast<Item*> (unsmob_grob (s));
+}
+
+
+
+ADD_INTERFACE(Item,
+ "item-interface",
+ "
+
+Grobs can be distinguished in their role in the horizontal spacing.
+Many grobs define constraints on the spacing by their sizes. For
+example, note heads, clefs, stems, and all other symbols with a fixed
+shape. These grobs form a subtype called @code{Item}.
+
+",
+ "no-spacing-rods break-visibility breakable")
projects / lilypond.git / blobdiff