source file of the GNU LilyPond music typesetter
- Copyright (c) 2009--2012 Han-Wen Nienhuys <hanwen@lilypond.org>
+ Copyright (c) 2009--2015 Han-Wen Nienhuys <hanwen@lilypond.org>
LilyPond is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "translator.icc"
-Scheme_engraver::Scheme_engraver ()
+#include "scm-hash.hh"
+
+Scheme_engraver::Scheme_engraver (SCM definition)
{
stop_translation_timestep_function_ = SCM_EOL;
start_translation_timestep_function_ = SCM_EOL;
process_acknowledged_function_ = SCM_EOL;
initialize_function_ = SCM_EOL;
finalize_function_ = SCM_EOL;
- listeners_alist_ = SCM_EOL;
interface_acknowledger_hash_ = SCM_EOL;
interface_end_acknowledger_hash_ = SCM_EOL;
must_be_last_ = false;
- per_instance_listeners_ = 0;
+ per_instance_listeners_ = SCM_EOL;
+
+ init_from_scheme (definition);
}
Scheme_engraver::~Scheme_engraver ()
{
- translator_listener_record *next = 0;
- for (translator_listener_record *r = per_instance_listeners_;
- r; r = next)
- {
- next = r->next_;
- delete r;
- }
}
// Extracts the value if callable, if not return #f.
SCM listeners = ly_assoc_get (ly_symbol2scm ("listeners"), definition, SCM_EOL);
- listeners_alist_ = SCM_EOL;
+ per_instance_listeners_ = SCM_EOL;
must_be_last_ = to_boolean (ly_assoc_get (ly_symbol2scm ("must-be-last"),
definition,
SCM_BOOL_F));
- translator_listener_record **tail = &per_instance_listeners_;
for (SCM p = listeners; scm_is_pair (p); p = scm_cdr (p))
{
SCM event_class = scm_caar (p);
// We should check the arity of the function?
// Record for later lookup.
- listeners_alist_ = scm_acons (event_class, proc, listeners_alist_);
-
- translator_listener_record *rec = new translator_listener_record;
- *tail = rec;
- rec->event_class_ = event_class;
- rec->get_listener_ = &Scheme_engraver::get_listener;
- tail = &rec->next_;
+ per_instance_listeners_ = scm_acons (event_class, proc, per_instance_listeners_);
}
init_acknowledgers (ly_assoc_get (ly_symbol2scm ("acknowledgers"),
Scheme_engraver::init_acknowledgers (SCM alist,
SCM *hash)
{
- *hash = scm_c_make_hash_table (7);
+ *hash = Scheme_hash_table::make_smob ();
for (SCM p = alist; scm_is_pair (p); p = scm_cdr (p))
{
SCM iface = scm_caar (p);
if (!(ly_is_procedure (proc) && ly_is_symbol (iface)))
continue;
- scm_hashq_set_x (*hash, iface, proc);
- }
-}
-
-// This is the easy way to do it, at the cost of too many invocations
-// of Scheme_engraver::acknowledge_grob. The clever dispatching of
-// acknowledgers is hardwired to have 1 method per engraver per
-// grob-type, which doesn't work for this case.
-void
-Scheme_engraver::acknowledge_grob (Grob_info info)
-{
- acknowledge_grob_by_hash (info, interface_acknowledger_hash_);
-}
-
-void
-Scheme_engraver::acknowledge_end_grob (Grob_info info)
-{
- acknowledge_grob_by_hash (info, interface_end_acknowledger_hash_);
-}
-
-void
-Scheme_engraver::acknowledge_grob_by_hash (Grob_info info,
- SCM iface_function_hash)
-{
- SCM meta = info.grob ()->internal_get_property (ly_symbol2scm ("meta"));
- SCM ifaces = scm_cdr (scm_assoc (ly_symbol2scm ("interfaces"), meta));
- for (SCM s = ifaces; scm_is_pair (s); s = scm_cdr (s))
- {
- SCM func = scm_hashq_ref (iface_function_hash,
- scm_car (s), SCM_BOOL_F);
-
- if (ly_is_procedure (func))
- scm_call_3 (func, self_scm (), info.grob ()->self_scm (),
- info.origin_translator ()->self_scm ());
+ unsmob<Scheme_hash_table>(*hash)->set (iface, proc);
}
}
-static
-void call_listen_closure (void *target, SCM ev)
-{
- SCM cl = (SCM) target;
- SCM func = scm_car (cl);
- SCM engraver = scm_cdr (cl);
- scm_call_2 (func, engraver, ev);
-}
-
-static
-void mark_listen_closure (void *target)
-{
- scm_gc_mark ((SCM)target);
-}
-
-static
-bool equal_listen_closure (void *a, void *b)
-{
- SCM target_a = (SCM) a;
- SCM target_b = (SCM) b;
-
- return ly_is_equal (target_a, target_b);
-}
-
-Listener_function_table listen_closure
-=
-{
- call_listen_closure, mark_listen_closure, equal_listen_closure
-};
-
-/* static */
-Listener
-Scheme_engraver::get_listener (void *arg, SCM name)
-{
- Scheme_engraver *me = (Scheme_engraver *) arg;
- SCM func = ly_assoc_get (name, me->listeners_alist_, SCM_BOOL_F);
- assert (ly_is_procedure (func));
-
- SCM closure = scm_cons (func, me->self_scm ());
- return Listener ((void *)closure, &listen_closure);
-}
-
-translator_listener_record *
+SCM
Scheme_engraver::get_listener_list () const
{
return per_instance_listeners_;
scm_gc_mark (finalize_function_);
scm_gc_mark (process_music_function_);
scm_gc_mark (process_acknowledged_function_);
- scm_gc_mark (listeners_alist_);
+ scm_gc_mark (per_instance_listeners_);
scm_gc_mark (interface_acknowledger_hash_);
scm_gc_mark (interface_end_acknowledger_hash_);
}
-ADD_ACKNOWLEDGER (Scheme_engraver, grob);
-ADD_END_ACKNOWLEDGER (Scheme_engraver, grob);
-
-ADD_TRANSLATOR (Scheme_engraver,
- /* doc */
- "Implement engravers in Scheme. Interprets arguments to"
- " @code{\\consists} as callbacks.",
-
- /* create */
- "",
-
- /* read */
- "",
-
- /* write */
- ""
- );
+ADD_TRANSLATOR_FAMILY (Scheme_engraver);
projects / lilypond.git / blobdiff