+/*
+ context.cc -- implement Context
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+*/
+
#include "translator-group.hh"
#include "context-def.hh"
+#include "context.hh"
#include "warn.hh"
-#include "music-output-def.hh"
+#include "output-def.hh"
#include "scm-hash.hh"
#include "main.hh"
+#include "ly-smobs.icc"
+#include "score-context.hh"
bool
-Translator_group::is_removable () const
+Context::is_removable () const
+{
+ return context_list_ == SCM_EOL && ! iterator_count_ &&
+ !dynamic_cast<Score_context const*> (this);
+}
+
+void
+Context::check_removal ()
+{
+ for (SCM p = context_list_; scm_is_pair (p); p = ly_cdr (p))
+ {
+ Context *trg = unsmob_context (ly_car (p));
+
+ trg->check_removal ();
+ if (trg->is_removable ())
+ {
+ recurse_over_translators (trg, &Translator::finalize, UP);
+ remove_context (trg);
+ }
+ }
+}
+
+Context::Context (Context const&)
{
- return trans_group_list_ == SCM_EOL && ! iterator_count_;
+ assert (false);
}
-Translator_group *
-Translator_group::find_existing_translator (SCM n, String id)
+Scheme_hash_table*
+Context::properties_dict () const
{
- if ((is_alias (n) && (id_string_ == id || id.is_empty ())) || n == ly_symbol2scm ("Current"))
- return this;
+ return Scheme_hash_table::unsmob (properties_scm_);
+}
- Translator_group* r = 0;
- for (SCM p = trans_group_list_; !r && gh_pair_p (p); p = ly_cdr (p))
+void
+Context::add_context (Context*t)
+{
+ SCM ts = t->self_scm ();
+ context_list_ = ly_append2 (context_list_,
+ scm_cons (ts, SCM_EOL));
+
+ t->daddy_context_ = this;
+ if (!t->init_)
{
- Translator * t = unsmob_translator (ly_car (p));
+ t->init_ = true;
- r = dynamic_cast<Translator_group*> (t)->find_existing_translator (n, id); }
+ scm_gc_unprotect_object (ts);
+ Context_def * td = unsmob_context_def (t->definition_);
+
+ /*
+ this can not 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, DOWN);
+ }
+}
+
+Context::Context ()
+{
+ daddy_context_ = 0;
+ init_ = false;
+ aliases_ = SCM_EOL;
+ iterator_count_ = 0;
+ implementation_ = SCM_EOL;
+ properties_scm_ = SCM_EOL;
+ accepts_list_ = SCM_EOL;
+ context_list_ = SCM_EOL;
+ definition_ = SCM_EOL;
+
+ smobify_self ();
- return r;
+ properties_scm_ = (new Scheme_hash_table)->self_scm ();
+ scm_gc_unprotect_object (properties_scm_);
}
-Translator_group*
-Translator_group::find_create_translator (SCM n, String id, SCM operations)
+
+Context*
+Context::find_create_context (SCM n, String id,
+ SCM operations)
{
- Translator_group * existing = find_existing_translator (n,id);
+ /*
+ 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);
+
+
+ Context * existing = find_context_below (this, n,id);
if (existing)
return existing;
+ if (n == ly_symbol2scm ("Bottom"))
+ {
+ Context* tg = get_default_interpreter ();
+ tg->id_string_ = id;
+ return tg;
+ }
/*
TODO: use accepts_list_.
*/
Link_array<Context_def> path
- = unsmob_context_def (definition_)->path_to_acceptable_translator (n, get_output_def ());
+ = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
if (path.size ())
{
- Translator_group * current = this;
+ Context * current = this;
// start at 1. The first one (index 0) will be us.
for (int i=0; i < path.size (); i++)
{
SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
- Translator_group * new_group
+ Context * new_group
= path[i]->instantiate (ops);
if (i == path.size () -1)
new_group->id_string_ = id;
}
- current->add_fresh_group_translator (new_group);
+ current->add_context (new_group);
apply_property_operations (new_group, ops);
current = new_group;
return current;
}
- Translator_group *ret = 0;
- if (daddy_trans_)
- ret = daddy_trans_->find_create_translator (n, id, operations);
+ /*
+ Don't go up to Global_context, because global goes down to
+ 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 ("Cannot find or create `%s' called `%s'",
none.
*/
SCM
-default_child_context_name (Translator_group const *tg)
+Context::default_child_context_name () const
{
- return gh_pair_p (tg->accepts_list_)
- ? ly_car (scm_last_pair (tg->accepts_list_))
+ return scm_is_pair (accepts_list_)
+ ? ly_car (scm_last_pair (accepts_list_))
: SCM_EOL;
}
bool
-Translator_group::is_bottom_context () const
+Context::is_bottom_context () const
{
- return !gh_symbol_p (default_child_context_name (this));
+ return !scm_is_symbol (default_child_context_name ());
}
-Translator_group*
-Translator_group::get_default_interpreter ()
+Context*
+Context::get_default_interpreter ()
{
if (!is_bottom_context ())
{
- SCM nm = default_child_context_name (this);
- SCM st = get_output_def ()->find_translator (nm);
+ SCM nm = default_child_context_name ();
+ SCM st = find_context_def (get_output_def (), nm);
Context_def *t = unsmob_context_def (st);
if (!t)
warning (_f ("can't find or create: `%s'", ly_symbol2string (nm).to_str0 ()));
t = unsmob_context_def (this->definition_);
}
- Translator_group *tg = t->instantiate (SCM_EOL);
- add_fresh_group_translator (tg);
+ Context *tg = t->instantiate (SCM_EOL);
+ add_context (tg);
if (!tg->is_bottom_context ())
return tg->get_default_interpreter ();
else
/*
PROPERTIES
*/
-Translator_group*
-Translator_group::where_defined (SCM sym) const
+Context*
+Context::where_defined (SCM sym) const
{
if (properties_dict ()->contains (sym))
{
- return (Translator_group*)this;
+ return (Context*)this;
}
- return (daddy_trans_) ? daddy_trans_->where_defined (sym) : 0;
+ return (daddy_context_) ? daddy_context_->where_defined (sym) : 0;
}
/*
return SCM_EOL when not found.
*/
SCM
-Translator_group::internal_get_property (SCM sym) const
+Context::internal_get_property (SCM sym) const
{
SCM val =SCM_EOL;
if (properties_dict ()->try_retrieve (sym, &val))
return val;
- if (daddy_trans_)
- return daddy_trans_->internal_get_property (sym);
+ if (daddy_context_)
+ return daddy_context_->internal_get_property (sym);
return val;
}
+bool
+Context::is_alias (SCM sym) const
+{
+ if (sym == ly_symbol2scm ("Bottom")
+ && !scm_is_pair (accepts_list_))
+ return true;
+ if (sym == unsmob_context_def (definition_)->get_context_name ())
+ return true;
+
+ return scm_c_memq (sym, aliases_) != SCM_BOOL_F;
+}
+
void
-Translator_group::internal_set_property (SCM sym, SCM val)
+Context::add_alias (SCM sym)
+{
+ aliases_ = scm_cons (sym, aliases_);
+}
+
+
+
+void
+Context::internal_set_property (SCM sym, SCM val)
{
#ifndef NDEBUG
if (internal_type_checking_global_b)
TODO: look up to check whether we have inherited var?
*/
void
-Translator_group::unset_property (SCM sym)
+Context::unset_property (SCM sym)
{
properties_dict ()->remove (sym);
}
+/**
+ Remove a context from the hierarchy.
+ */
+Context *
+Context::remove_context (Context*trans)
+{
+ assert (trans);
+
+ context_list_ = scm_delq_x (trans->self_scm (), context_list_);
+ trans->daddy_context_ = 0;
+ return trans;
+}
+
+/*
+ ID == "" means accept any ID.
+ */
+Context *
+find_context_below (Context * where,
+ SCM type, String id)
+{
+ if (where->is_alias (type))
+ {
+ if (id == "" || where->id_string () == id)
+ return where;
+ }
+
+ Context * found = 0;
+ for (SCM s = where->children_contexts ();
+ !found && scm_is_pair (s); s = ly_cdr (s))
+ {
+ Context * tr = unsmob_context (ly_car (s));
+
+ found = find_context_below (tr, type, id);
+ }
+
+ return found;
+}
+
+SCM
+Context::properties_as_alist () const
+{
+ return properties_dict ()->to_alist ();
+}
+
+String
+Context::context_name () const
+{
+ Context_def * td = unsmob_context_def (definition_ );
+ return ly_symbol2string (td->get_context_name ());
+}
+
+
+Score_context*
+Context::get_score_context () const
+{
+ if (Score_context *sc =dynamic_cast<Score_context*> ((Context*)this))
+ return sc;
+ else if (daddy_context_)
+ return daddy_context_->get_score_context ();
+ else
+ return 0;
+}
+
+Output_def *
+Context::get_output_def () const
+{
+ return (daddy_context_)
+ ? daddy_context_->get_output_def () : 0;
+}
+
+Context::~Context ()
+{
+
+}
+
+Moment
+Context::now_mom () const
+{
+ return daddy_context_->now_mom ();
+}
+
+int
+Context::print_smob (SCM s, SCM port, scm_print_state *)
+{
+ Context *sc = (Context *) ly_cdr (s);
+
+ scm_puts ("#<", port);
+ scm_puts (classname (sc), port);
+ if (Context_def *d=unsmob_context_def (sc->definition_))
+ {
+ scm_puts (" ", port);
+ scm_display (d->get_context_name (), port);
+ }
+
+ if (Context *td=dynamic_cast<Context *> (sc))
+ {
+ scm_puts ("=", port);
+ scm_puts (td->id_string_.to_str0 (), port);
+ }
+
+
+ scm_puts (" ", port);
+
+ scm_display (sc->context_list_, port);
+ scm_puts (" >", port);
+
+ return 1;
+}
+
+SCM
+Context::mark_smob (SCM sm)
+{
+ Context * me = (Context*) SCM_CELL_WORD_1 (sm);
+
+ scm_gc_mark (me->context_list_);
+ scm_gc_mark (me->aliases_);
+ scm_gc_mark (me->definition_);
+ scm_gc_mark (me->properties_scm_);
+ scm_gc_mark (me->accepts_list_);
+ scm_gc_mark (me->implementation_);
+
+ return me->properties_scm_;
+}
+
+IMPLEMENT_SMOBS (Context);
+IMPLEMENT_DEFAULT_EQUAL_P (Context);
+IMPLEMENT_TYPE_P (Context,"ly:context?");
+
+bool
+Context::try_music (Music* m)
+{
+ Translator* 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
+{
+ if (dynamic_cast<Global_context *>((Context*) this))
+ return dynamic_cast<Global_context *> ((Context*) this);
+
+ if (daddy_context_)
+ return daddy_context_->get_global_context ();
+
+ programming_error ("No Global context!");
+ return 0;
+}
+
+Context*
+Context::get_parent_context () const
+{
+ return daddy_context_;
+}
+
+Translator_group*
+Context::implementation () const
+{
+ return dynamic_cast<Translator_group*> (unsmob_translator (implementation_));
+}
projects / lilypond.git / blobdiff