source file of the GNU LilyPond music typesetter
- (c) 2004--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 2004--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "context.hh"
#include "context-def.hh"
+#include "dispatcher.hh"
+#include "global-context.hh"
#include "international.hh"
#include "ly-smobs.icc"
#include "main.hh"
#include "profile.hh"
#include "program-option.hh"
#include "scm-hash.hh"
-#include "score-context.hh"
#include "translator-group.hh"
#include "warn.hh"
Context::is_removable () const
{
return context_list_ == SCM_EOL && ! iterator_count_
- && !dynamic_cast<Score_context const *> (this);
+ && !dynamic_cast<Global_context const *> (daddy_context_);
}
void
{
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);
}
}
}
Context::Context (Context const &src)
- : key_manager_ (src.key_manager_)
{
+ (void) src;
assert (false);
}
}
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;
-
- t->unprotect ();
- Context_def *td = unsmob_context_def (t->definition_);
+ scm_cons (child->self_scm (), SCM_EOL));
- /* 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_);
}
-Context::Context (Object_key const *key)
- : key_manager_ (key)
+Context::Context ()
{
daddy_context_ = 0;
- init_ = false;
aliases_ = SCM_EOL;
iterator_count_ = 0;
implementation_ = 0;
accepts_list_ = SCM_EOL;
context_list_ = SCM_EOL;
definition_ = SCM_EOL;
+ definition_mods_ = SCM_EOL;
+ event_source_ = 0;
+ events_below_ = 0;
smobify_self ();
Scheme_hash_table *tab = new Scheme_hash_table;
properties_scm_ = tab->unprotect ();
-
- /*
- UGH UGH
- const correctness.
- */
- key_manager_.unprotect();
+ event_source_ = new Dispatcher ();
+ event_source_->unprotect ();
+ events_below_ = new Dispatcher ();
+ events_below_->unprotect ();
}
/* TODO: this shares code with find_create_context (). */
/*
Don't create multiple score contexts.
*/
- if (dynamic_cast<Global_context *> (this)
- && dynamic_cast<Global_context *> (this)->get_score_context ())
- return get_score_context ()->create_unique_context (name, id, operations);
-
- /*
- TODO: use accepts_list_.
- */
- vector<Context_def*> path
- = unsmob_context_def (definition_)->path_to_acceptable_context (name, get_output_def ());
+ Global_context *gthis = dynamic_cast<Global_context *> (this);
+ if (gthis && gthis->get_score_context ())
+ return gthis->get_score_context ()->create_unique_context (name, id, operations);
+ vector<Context_def*> path = path_to_acceptable_context (name);
if (path.size ())
{
Context *current = this;
- // start at 1. The first one (index 0) will be us.
+ // Iterate through the path and create all of the implicit contexts.
for (vsize i = 0; i < path.size (); i++)
{
SCM ops = SCM_EOL;
}
/*
- Don't go up to Global_context, because global goes down to
- Score_context
+ Don't go up to Global_context, because global goes down to the
+ Score context
*/
Context *ret = 0;
if (daddy_context_ && !dynamic_cast<Global_context *> (daddy_context_))
ret = daddy_context_->create_unique_context (name, id, operations);
else
{
- warning (_f ("can't find or create new `%s'",
+ warning (_f ("cannot find or create new `%s'",
ly_symbol2string (name).c_str ()));
ret = 0;
}
/*
Don't create multiple score contexts.
*/
- if (dynamic_cast<Global_context *> (this)
- && dynamic_cast<Global_context *> (this)->get_score_context ())
- return get_score_context ()->find_create_context (n, id, operations);
+ Global_context *gthis = dynamic_cast<Global_context *> (this);
+ if (gthis && gthis->get_score_context ())
+ return gthis->get_score_context ()->find_create_context (n, id, operations);
if (Context *existing = find_context_below (this, n, id))
return existing;
return tg;
}
- /*
- TODO: use accepts_list_.
- */
- vector<Context_def*> path
- = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
+ vector<Context_def*> path = path_to_acceptable_context (n);
if (path.size ())
{
}
/*
- Don't go up to Global_context, because global goes down to
- Score_context
+ Don't go up to Global_context, because global goes down to the
+ Score context
*/
Context *ret = 0;
if (daddy_context_ && !dynamic_cast<Global_context *> (daddy_context_))
ret = daddy_context_->find_create_context (n, id, operations);
else
{
- warning (_f ("can't find or create `%s' called `%s'",
+ warning (_f ("cannot find or create `%s' called `%s'",
ly_symbol2string (n).c_str (), id));
ret = 0;
}
return ret;
}
+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)
+ set_property (sym, val);
+ }
+}
+
+IMPLEMENT_LISTENER (Context, unset_property_from_event);
+void
+Context::unset_property_from_event (SCM sev)
+{
+ 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);
+}
+
+/*
+ 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);
+
+ vector<Context_def*> path = path_to_acceptable_context (type_scm);
+
+ 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);
+
+ new_context->id_string_ = id;
+
+ /* 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_);
+ 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);
+
+ send_stream_event (this, "AnnounceNewContext", 0,
+ ly_symbol2scm ("context"), new_context->self_scm (),
+ ly_symbol2scm ("creator"), sev);
+}
+
+vector<Context_def*>
+Context::path_to_acceptable_context (SCM name) const
+{
+ // The 'accepts elements in definition_mods_ is a list of ('accepts string),
+ // but the Context_def expects to see elements of the form ('accepts symbol).
+ SCM accepts = SCM_EOL;
+ for (SCM s = scm_reverse (definition_mods_); scm_is_pair (s); s = scm_cdr (s))
+ if (scm_caar (s) == ly_symbol2scm ("accepts"))
+ {
+ SCM elt = scm_list_2 (scm_caar (s), scm_string_to_symbol (scm_cadar (s)));
+ accepts = scm_cons (elt, accepts);
+ }
+
+ return unsmob_context_def (definition_)->path_to_acceptable_context (name,
+ get_output_def (),
+ accepts);
+
+}
+
Context *
Context::create_context (Context_def *cdef,
string id,
SCM ops)
{
- string type = ly_symbol2string (cdef->get_context_name ());
- Object_key const *key = key_manager_.get_context_key (now_mom(), type, id);
- Context *new_context
- = cdef->instantiate (ops, key);
-
- new_context->id_string_ = id;
- add_context (new_context);
- apply_property_operations (new_context, 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"), ly_string2scm (id));
+ 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);
+
+ if (!infant || infant->get_parent_context () != this)
+ {
+ programming_error ("create_context: can't locate newly created context");
+ return 0;
+ }
- return new_context;
+ return infant;
}
/*
Context_def *t = unsmob_context_def (st);
if (!t)
{
- warning (_f ("can't find or create: `%s'", name.c_str ()));
+ warning (_f ("cannot find or create: `%s'", name.c_str ()));
t = unsmob_context_def (this->definition_);
}
Context *tg = create_context (t, "", SCM_EOL);
- if (!tg->is_bottom_context ())
- return tg->get_default_interpreter ();
- else
- return tg;
+ return tg->get_default_interpreter ();
}
return this;
}
return val;
}
+/*
+Called by the send_stream_event macro. props is a 0-terminated array of
+properties and corresponding values, interleaved. This method should not
+be called from any other place than the send_stream_event macro.
+*/
+void
+Context::internal_send_stream_event (SCM type, Input *origin, SCM props[])
+{
+ Stream_event *e = new Stream_event (type, origin);
+ for (int i = 0; props[i]; i += 2)
+ {
+ e->set_property (props[i], props[i+1]);
+ }
+ event_source_->broadcast (e);
+ e->unprotect ();
+}
+
bool
Context::is_alias (SCM sym) const
{
aliases_ = scm_cons (sym, aliases_);
}
+/* we don't (yet) instrument context properties */
+void
+Context::instrumented_set_property (SCM sym, SCM val, const char*, int, const char*)
+{
+ internal_set_property (sym, val);
+}
+
void
Context::internal_set_property (SCM sym, SCM val)
{
-#ifndef NDEBUG
if (do_internal_type_checking_global)
assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")));
-#endif
properties_dict ()->set (sym, val);
}
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 */
+ Translator_group *impl = implementation ();
+ if (impl)
+ impl->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;
}
/*
return ly_symbol2string (context_name_symbol ());
}
-Score_context *
+Context *
Context::get_score_context () const
{
- if (Score_context *sc = dynamic_cast<Score_context *> ((Context *) this))
- return sc;
- else if (daddy_context_)
+ if (daddy_context_)
return daddy_context_->get_score_context ();
else
return 0;
return 1;
}
-Object_key const *
-Context::get_grob_key (string name)
-{
- return key_manager_.get_grob_key (now_mom (), name);
-}
-
-Object_key const *
-Context::get_context_key (string name, string id)
-{
- return key_manager_.get_context_key (now_mom (), name, id);
-}
-
SCM
Context::mark_smob (SCM sm)
{
Context *me = (Context *) SCM_CELL_WORD_1 (sm);
- me->key_manager_.gc_mark();
scm_gc_mark (me->context_list_);
scm_gc_mark (me->aliases_);
scm_gc_mark (me->definition_);
+ scm_gc_mark (me->definition_mods_);
scm_gc_mark (me->properties_scm_);
scm_gc_mark (me->accepts_list_);
+
if (me->implementation_)
scm_gc_mark (me->implementation_->self_scm ());
+ if (me->event_source_)
+ scm_gc_mark (me->event_source_->self_scm ());
+
+ if (me->events_below_)
+ scm_gc_mark (me->events_below_->self_scm ());
+
return me->properties_scm_;
}
IMPLEMENT_DEFAULT_EQUAL_P (Context);
IMPLEMENT_TYPE_P (Context, "ly:context?");
-bool
-Context::try_music (Music *m)
-{
- Translator_group *t = implementation ();
- if (!t)
- return false;
-
- bool b = t->try_music (m);
- if (!b && daddy_context_)
- b = daddy_context_->try_music (m);
-
- return b;
-}
-
Global_context *
Context::get_global_context () const
{
return daddy_context_;
}
-void
-Context::clear_key_disambiguations ()
-{
- if (!use_object_keys)
- return;
-
- key_manager_.clear ();
- for (SCM s = context_list_; scm_is_pair (s); s = scm_cdr (s))
- unsmob_context (scm_car (s))->clear_key_disambiguations ();
-}
-
/*
Ugh. Where to put this?
*/
return m;
}
+/* Finds the measure position after a note of length DUR that
+ begins at the current measure position. */
+Moment
+measure_position (Context const *context, Duration const *dur)
+{
+ Moment pos = measure_position (context);
+ Rational dur_length = dur ? dur->get_length () : Rational (0);
+
+ Moment end_pos = pos.grace_part_ < Rational(0)
+ ? Moment(pos.main_part_, pos.grace_part_ + dur_length)
+ : Moment(pos.main_part_ + dur_length, 0);
+
+ return end_pos;
+}
+
+int
+measure_number (Context const *context)
+{
+ SCM barnum = context->get_property ("internalBarNumber");
+ SCM smp = context->get_property ("measurePosition");
+
+ int bn = robust_scm2int (barnum, 0);
+ Moment mp = robust_scm2moment (smp, Moment (0));
+ if (mp.main_part_ < Rational (0))
+ bn--;
+
+ return bn;
+}
+
void
set_context_property_on_children (Context *trans, SCM sym, SCM val)
{
- trans->internal_set_property (sym, ly_deep_copy (val));
+ trans->set_property (sym, ly_deep_copy (val));
for (SCM p = trans->children_contexts (); scm_is_pair (p); p = scm_cdr (p))
{
Context *trg = unsmob_context (scm_car (p));
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 (; !busy && 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