{
for (SCM p = context_list_; scm_is_pair (p); p = scm_cdr (p))
{
- Context *trg = unsmob_context (scm_car (p));
+ Context *ctx = unsmob_context (scm_car (p));
- trg->check_removal ();
- if (trg->is_removable ())
+ ctx->check_removal ();
+ if (ctx->is_removable ())
{
- recurse_over_translators (trg, &Translator::finalize,
+ recurse_over_translators (ctx, &Translator::finalize,
&Translator_group::finalize,
UP);
- remove_context (trg);
+ send_stream_event (ctx, "RemoveContext", 0, 0);
}
}
}
}
void
-Context::add_context (Context *t)
+Context::add_context (Context *child)
{
- SCM ts = t->self_scm ();
context_list_ = ly_append2 (context_list_,
- scm_cons (ts, SCM_EOL));
-
- t->daddy_context_ = this;
- if (!t->init_)
- {
- t->init_ = true;
+ scm_cons (child->self_scm (), SCM_EOL));
- t->unprotect ();
- Context_def *td = unsmob_context_def (t->definition_);
-
- /* This cannot move before add_context (), because \override
- operations require that we are in the hierarchy. */
- td->apply_default_property_operations (t);
-
- recurse_over_translators (t,
- &Translator::initialize,
- &Translator_group::initialize,
- DOWN);
- }
+ child->daddy_context_ = this;
+ this->events_below_->register_as_listener (child->events_below_);
}
: key_manager_ (key)
{
daddy_context_ = 0;
- init_ = false;
aliases_ = SCM_EOL;
iterator_count_ = 0;
implementation_ = 0;
context_list_ = SCM_EOL;
definition_ = SCM_EOL;
definition_mods_ = SCM_EOL;
- unique_ = -1;
event_source_ = 0;
events_below_ = 0;
return ret;
}
-Context *
-Context::create_context (Context_def *cdef,
- string id,
- SCM ops)
+IMPLEMENT_LISTENER (Context, acknowledge_infant);
+void
+Context::acknowledge_infant (SCM sev)
+{
+ infant_event_ = unsmob_stream_event (sev);
+}
+
+IMPLEMENT_LISTENER (Context, set_property_from_event);
+void
+Context::set_property_from_event (SCM sev)
+{
+ Stream_event *ev = unsmob_stream_event (sev);
+
+ SCM sym = ev->get_property ("symbol");
+ if (scm_is_symbol (sym))
+ {
+ SCM val = ev->get_property ("value");
+ bool ok = true;
+ if (val != SCM_EOL)
+ ok = type_check_assignment (sym, val, ly_symbol2scm ("translation-type?"));
+ if (ok)
+ internal_set_property (sym, val);
+ }
+}
+
+IMPLEMENT_LISTENER (Context, unset_property_from_event);
+void
+Context::unset_property_from_event (SCM sev)
{
- int unique = get_global_context()->new_unique();
+ Stream_event *ev = unsmob_stream_event (sev);
+
+ SCM sym = ev->get_property ("symbol");
+ type_check_assignment (sym, SCM_EOL, ly_symbol2scm ("translation-type?"));
+ unset_property (sym);
+}
- // TODO: The following should be carried out by a listener.
- string type = ly_symbol2string (cdef->get_context_name ());
+/*
+ Creates a new context from a CreateContext event, and sends an
+ AnnounceNewContext event to this context.
+*/
+IMPLEMENT_LISTENER (Context, create_context_from_event);
+void
+Context::create_context_from_event (SCM sev)
+{
+ Stream_event *ev = unsmob_stream_event (sev);
+
+ string id = ly_scm2string (ev->get_property ("id"));
+ SCM ops = ev->get_property ("ops");
+ SCM type_scm = ev->get_property ("type");
+ string type = ly_symbol2string (type_scm);
Object_key const *key = key_manager_.get_context_key (now_mom(), type, id);
- Context *new_context
- = cdef->instantiate (ops, key);
+
+ vector<Context_def*> path
+ = unsmob_context_def (definition_)->path_to_acceptable_context (type_scm, get_output_def ());
+ if (path.size () != 1)
+ {
+ programming_error (_f ("Invalid CreateContext event: Cannot create %s context", type.c_str ()));
+ return;
+ }
+ Context_def *cdef = path[0];
+
+ Context *new_context = cdef->instantiate (ops, key);
new_context->id_string_ = id;
- new_context->unique_ = unique;
+ /* Register various listeners:
+ - Make the new context hear events that universally affect contexts
+ - connect events_below etc. properly */
+ /* We want to be the first ones to hear our own events. Therefore, wait
+ before registering events_below_ */
+ new_context->event_source ()->
+ add_listener (GET_LISTENER (new_context->create_context_from_event),
+ ly_symbol2scm ("CreateContext"));
+ new_context->event_source ()->
+ add_listener (GET_LISTENER (new_context->remove_context),
+ ly_symbol2scm ("RemoveContext"));
+ new_context->event_source ()->
+ add_listener (GET_LISTENER (new_context->change_parent),
+ ly_symbol2scm ("ChangeParent"));
+ new_context->event_source ()->
+ add_listener (GET_LISTENER (new_context->set_property_from_event),
+ ly_symbol2scm ("SetProperty"));
+ new_context->event_source ()->
+ add_listener (GET_LISTENER (new_context->unset_property_from_event),
+ ly_symbol2scm ("UnsetProperty"));
+
new_context->events_below_->register_as_listener (new_context->event_source_);
-
- add_context (new_context);
+ this->add_context (new_context);
+
+ new_context->unprotect ();
+
+ Context_def *td = unsmob_context_def (new_context->definition_);
+
+ /* This cannot move before add_context (), because \override
+ operations require that we are in the hierarchy. */
+ td->apply_default_property_operations (new_context);
apply_property_operations (new_context, ops);
- events_below_->register_as_listener (new_context->events_below_);
- // TODO: The above operations should be performed by a listener to the following event.
- send_stream_event (this, "CreateContext",
- ly_symbol2scm ("unique"), scm_int2num (unique),
+ send_stream_event (this, "AnnounceNewContext", 0,
+ ly_symbol2scm ("context"), new_context->self_scm (),
+ ly_symbol2scm ("creator"), sev);
+}
+
+Context *
+Context::create_context (Context_def *cdef,
+ string id,
+ SCM ops)
+{
+ infant_event_ = 0;
+ /* TODO: This is fairly misplaced. We can fix this when we have taken out all
+ iterator specific stuff from the Context class */
+ event_source_->
+ add_listener (GET_LISTENER (acknowledge_infant),
+ ly_symbol2scm ("AnnounceNewContext"));
+ /* The CreateContext creates a new context, and sends an announcement of the
+ new context through another event. That event will be stored in
+ infant_event_ to create a return value. */
+ send_stream_event (this, "CreateContext", 0,
ly_symbol2scm ("ops"), ops,
ly_symbol2scm ("type"), cdef->get_context_name (),
ly_symbol2scm ("id"), scm_makfrom0str (id.c_str ()));
+ event_source_->
+ remove_listener (GET_LISTENER (acknowledge_infant),
+ ly_symbol2scm ("AnnounceNewContext"));
+
+ assert (infant_event_);
+ SCM infant_scm = infant_event_->get_property ("context");
+ Context *infant = unsmob_context (infant_scm);
- return new_context;
+ if (!infant || infant->get_parent_context () != this)
+ {
+ programming_error ("create_context: can't locate newly created context");
+ return 0;
+ }
+
+ return infant;
}
/*
be called from any other place than the send_stream_event macro.
*/
void
-Context::internal_send_stream_event (SCM type, SCM props[])
+Context::internal_send_stream_event (SCM type, Input *origin, SCM props[])
{
- Stream_event *e = new Stream_event (this, type);
+ Stream_event *e = new Stream_event (type, origin);
for (int i = 0; props[i]; i += 2)
{
e->internal_set_property (props[i], props[i+1]);
properties_dict ()->remove (sym);
}
-/**
- Remove a context from the hierarchy.
-*/
-Context *
-Context::remove_context (Context *trans)
+IMPLEMENT_LISTENER (Context, change_parent);
+void
+Context::change_parent (SCM sev)
{
- assert (trans);
+ Stream_event *ev = unsmob_stream_event (sev);
+ Context *to = unsmob_context (ev->get_property ("context"));
- context_list_ = scm_delq_x (trans->self_scm (), context_list_);
- trans->daddy_context_ = 0;
- return trans;
+ disconnect_from_parent ();
+ to->add_context (this);
}
+/*
+ Die. The next GC sweep should take care of the actual death.
+ */
+IMPLEMENT_LISTENER (Context, remove_context);
+void
+Context::remove_context (SCM)
+{
+ /* ugh, the translator group should listen to RemoveContext events by itself */
+ implementation ()->disconnect_from_context ();
+ disconnect_from_parent ();
+}
+
+void
+Context::disconnect_from_parent ()
+{
+ daddy_context_->events_below_->unregister_as_listener (this->events_below_);
+ daddy_context_->context_list_ = scm_delq_x (this->self_scm (), daddy_context_->context_list_);
+ daddy_context_ = 0;
+}
/*
ID == "" means accept any ID.
return found;
}
-Context *
-find_context_below (Context *where,
- int unique)
-{
- if (where->get_unique () == unique)
- return where;
-
- Context *found = 0;
- for (SCM s = where->children_contexts ();
- !found && scm_is_pair (s); s = scm_cdr (s))
- {
- Context *tr = unsmob_context (scm_car (s));
-
- found = find_context_below (tr, unique);
- }
-
- return found;
-}
-
SCM
Context::properties_as_alist () const
{
set_context_property_on_children (trg, sym, ly_deep_copy (val));
}
}
+
+bool
+melisma_busy (Context *tr)
+{
+ SCM melisma_properties = tr->get_property ("melismaBusyProperties");
+ bool busy = false;
+
+ for (; scm_is_pair (melisma_properties);
+ melisma_properties = scm_cdr (melisma_properties))
+ busy = busy || to_boolean (tr->internal_get_property (scm_car (melisma_properties)));
+
+ return busy;
+}
projects / lilypond.git / blobdiff