/*
  translator-dispatch-list.cc -- implement Translator_dispatch_list

  source file of the GNU LilyPond music typesetter

  (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/

#include "translator-dispatch-list.hh"

#include "grob-info.hh"
#include "engraver.hh"

#include "ly-smobs.icc"

void
Engraver_dispatch_list::apply (Grob_info gi)
{
  Translator *origin = gi.origin_translator ();
  for (vsize i = 0; i < dispatch_entries_.size (); i++)
    {
      Engraver_dispatch_entry const &e (dispatch_entries_[i]);
      if (e.engraver_ == origin)
	continue;

      (*e.function_) (e.engraver_, gi);
    }
}

SCM
Engraver_dispatch_list::create (SCM trans_list,
				SCM iface_list, Direction start_end)
{
  SCM retval = Engraver_dispatch_list ().smobbed_copy ();
  Engraver_dispatch_list *list = Engraver_dispatch_list::unsmob (retval);

  Engraver_dispatch_entry entry;
  bool found = false;
  for (SCM s = trans_list; scm_is_pair (s); s = scm_cdr (s))
    {
      Engraver *eng
	= dynamic_cast<Engraver *> (unsmob_translator (scm_car (s)));

      if (!eng)
	continue;

      entry.engraver_ = eng;
      for (SCM i = iface_list; scm_is_pair (i); i = scm_cdr (i))
	{
	  Engraver_void_function_engraver_grob_info ptr
	    = (start_end == START)
	    ? eng->get_acknowledger (scm_car (i))
	    : eng->get_end_acknowledger (scm_car (i));
	  
	  if (ptr)
	    {
	      entry.function_ = ptr;
	      list->dispatch_entries_.push_back (entry);
	      found = true;
	    }
	}
    }

  return found ? retval : SCM_EOL;
}

SCM
Engraver_dispatch_list::mark_smob (SCM x)
{
  (void)x;
  return SCM_BOOL_F;
}

int
Engraver_dispatch_list::print_smob (SCM x, SCM p, scm_print_state *)
{
  (void)x;
  scm_puts ("#<Engraver_dispatch_list>", p);
  return 1;
}

IMPLEMENT_SIMPLE_SMOBS (Engraver_dispatch_list);
IMPLEMENT_DEFAULT_EQUAL_P (Engraver_dispatch_list);
