release: 1.2.9

[lilypond.git] / lily / item.cc

diff --git a/lily/item.cc b/lily/item.cc
index f9adbba73c7d47c8cf4f19415d7eca87c209d34a..e8ea0357df279be236b1f967808e36d71b5100c3 100644 (file)
--- a/lily/item.cc
+++ b/lily/item.cc
@@ -1,20 +1,229 @@
+/*
+  item.cc -- implement Item
+
+  source file of the GNU LilyPond music typesetter
+
+  (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+#include "dimension-cache.hh"
+
+#include "paper-score.hh"
 #include "debug.hh"
 #include "item.hh"
+#include "paper-column.hh"
+#include "spanner.hh"
+#include "lily-guile.hh"
 
+Item::Item ()
+{
+  broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0;
+}
 
+bool
+Item::breakable_b () const
+{
+  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;
+}
 
-Item::Item()
+void
+Item::do_print() const
 {
-    pcol_l_ = 0;
 }
 
-IMPLEMENT_STATIC_NAME(Item);
+
+Real 
+Item::hpos_f() const
+{
+  return relative_coordinate (0, X_AXIS);
+}
+
+Line_of_score *
+Item::line_l() const
+{
+  Graphical_element *g = parent_l (X_AXIS);
+  if (!g)
+    return 0;
+  return dynamic_cast<Score_element *> (g)-> line_l ();
+}
+
 
 void
-Item::do_print() const
+Item::copy_breakable_items()
 {
-#ifndef NPRINT
-    mtor << "(unknown)";
-#endif
+  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);
+      new_copies[i] =item_p;
+    }
+  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 ()
+{
+  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]);
+}
+
+void
+Item::do_breakable_col_processing()
+{
+  if (breakable_b ())
+    do_break ();
+  else
+    try_visibility_lambda ();
+}
+
+Score_element*
+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];
+
+  return 0;
+}
+
+Item*
+Item::find_broken_piece (Direction d) const
+{
+  if (!d)
+    return (Item *) (this);    // ugh
+  else
+    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
+{
+  return dynamic_cast<Item*> (parent_l (X_AXIS))->column_l ();
+}
+
+Item::Item (Item const &s)
+  : Score_element (s)
+{
+  broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
+}
+
+
+void
+Item::handle_prebroken_dependents ()
+{
+  Item * parent =  dynamic_cast<Item*> (parent_l (X_AXIS));
+  if (breakable_b () && parent)
+    {
+       if(!(broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]))
+       do_break ();
+
+      Direction d = LEFT;
+      do
+       {
+         Item * broken_self = find_broken_piece (d);
+         Item * broken_parent = parent->find_broken_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_broken_piece (d) : 0;
+             
+             if (!yparent)
+               programming_error ("Vertical refpoint lost!");
+             else if (yparenti)
+               {
+                 broken_self->set_parent (broken_yparent, Y_AXIS);
+               }
+           }
+       }
+      while ((flip (&d))!=LEFT);
+    }
+}
+
+Direction
+Item::break_status_dir () const
+{
+  if (original_l_)
+    {
+      Item * i = dynamic_cast<Item*> (original_l_);
+
+      return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT;
+    }
+  else
+    return CENTER;
 }