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/*
translator.icc -- declare Translator glue wiring.
source file of the GNU LilyPond music typesetter
(c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#ifndef TRANSLATOR_ICC
#define TRANSLATOR_ICC
#include "listener.hh"
#include "std-vector.hh"
#include "translator.hh"
/**
A macro to automate administration of translators.
*/
#define ADD_THIS_TRANSLATOR(T) \
translator_listener_record *T::listener_list_; \
SCM T::static_description_ = SCM_EOL; \
static void _ ## T ## _adder () \
{ \
T *t = new T; \
T::static_description_ = t->static_translator_description (); \
scm_permanent_object (T::static_description_); \
add_translator (t); \
} \
SCM T::translator_description () const \
{ \
return static_description_; \
} \
ADD_GLOBAL_CTOR (_ ## T ## _adder);
#define ADD_TRANSLATOR(classname, desc, grobs, accepted, read, write) \
Drul_array< vector<Acknowledge_information> > classname::acknowledge_static_array_drul_; \
IMPLEMENT_FETCH_PRECOMPUTABLE_METHODS (classname); \
ADD_THIS_TRANSLATOR (classname); \
Engraver_void_function_engraver_grob_info \
classname::static_get_acknowledger (SCM sym) \
{ \
return generic_get_acknowledger (sym, &acknowledge_static_array_drul_[START]); \
} \
Engraver_void_function_engraver_grob_info \
classname::static_get_end_acknowledger (SCM sym) \
{ \
return generic_get_acknowledger (sym, &acknowledge_static_array_drul_[STOP]); \
} \
SCM \
classname::static_translator_description () const \
{ \
SCM static_properties = SCM_EOL; \
/* static_properties = acons (name , gh_str02scm (Translator::name (self_scm ())), \
static_properties_); \
*/ \
static_properties = scm_acons (ly_symbol2scm ("grobs-created"), \
parse_symbol_list (grobs), static_properties); \
\
static_properties = scm_acons (ly_symbol2scm ("description"), \
scm_makfrom0str (desc), static_properties); \
\
static_properties = scm_acons (ly_symbol2scm ("events-accepted"), \
parse_symbol_list (accepted), static_properties); \
\
static_properties = scm_acons (ly_symbol2scm ("properties-read"), \
parse_symbol_list (read), static_properties); \
\
static_properties = scm_acons (ly_symbol2scm ("properties-written"), \
parse_symbol_list (write), static_properties); \
\
return static_properties; \
}
#define IMPLEMENT_FETCH_PRECOMPUTABLE_METHODS(T) \
void \
T::fetch_precomputable_methods (Translator_void_method_ptr ptrs[]) \
{ \
ptrs[START_TRANSLATION_TIMESTEP] = \
((Translator_void_method_ptr) & T::start_translation_timestep == \
(Translator_void_method_ptr) & Translator::start_translation_timestep) \
? 0 \
: (Translator_void_method_ptr) & T::start_translation_timestep; \
\
ptrs[STOP_TRANSLATION_TIMESTEP] = \
((Translator_void_method_ptr) & T::stop_translation_timestep == (Translator_void_method_ptr) & Translator::stop_translation_timestep) \
? 0 \
: (Translator_void_method_ptr) & T::stop_translation_timestep; \
\
ptrs[PROCESS_MUSIC] = \
((Translator_void_method_ptr) & T::process_music == (Translator_void_method_ptr) & Translator::process_music) \
? 0 \
: (Translator_void_method_ptr) & T::process_music; \
\
ptrs[PROCESS_ACKNOWLEDGED] = \
((Translator_void_method_ptr) & T::process_acknowledged == (Translator_void_method_ptr) & Translator::process_acknowledged) \
? 0 \
: (Translator_void_method_ptr) & T::process_acknowledged; \
}
void add_acknowledger (Engraver_void_function_engraver_grob_info ptr,
char const *func_name,
vector<Acknowledge_information> *ack_array);
Engraver_void_function_engraver_grob_info
generic_get_acknowledger (SCM sym,
vector<Acknowledge_information> const *ack_array);
#define ADD_ACKNOWLEDGER(CLASS, NAME) \
void CLASS ## NAME ## _ack_adder () \
{ \
add_acknowledger ((Engraver_void_function_engraver_grob_info) & CLASS::acknowledge_ ## NAME, #NAME, &CLASS::acknowledge_static_array_drul_[START]); \
} \
ADD_SCM_INIT_FUNC (CLASS ## NAME ## _ack_adder_initclass, CLASS ## NAME ## _ack_adder);
#define ADD_END_ACKNOWLEDGER(CLASS, NAME) \
void CLASS ## NAME ## _end_ack_adder () \
{ \
add_acknowledger ((Engraver_void_function_engraver_grob_info) & CLASS::acknowledge_end_ ## NAME, #NAME, &CLASS::acknowledge_static_array_drul_[STOP]); \
} \
ADD_SCM_INIT_FUNC (CLASS ## NAME ## _end_ack_adder_initclass, CLASS ## NAME ## _end_ack_adder);
/*
Implement the method cl::listen_##m, and make it listen to stream
events of class m.
*/
#define IMPLEMENT_TRANSLATOR_LISTENER(cl, m) \
void \
cl :: _internal_declare_ ## m () \
{ \
static translator_listener_record r; \
add_translator_listener (&listener_list_, &r, _get_ ## m ## _listener, #m); \
} \
\
ADD_SCM_INIT_FUNC (cl ## _declare_event_ ## m, cl::_internal_declare_ ## m); \
\
Listener \
cl :: _get_ ## m ## _listener (void *me) \
{ \
cl *obj = (cl *) me; \
return obj->GET_LISTENER (_listen_scm_ ## m); \
} \
\
IMPLEMENT_LISTENER (cl, _listen_scm_ ## m) \
void \
cl::_listen_scm_ ## m (SCM sev) \
{ \
Stream_event *ev = unsmob_stream_event (sev); \
protect_event (sev); \
listen_ ## m (ev); \
}
/*
This helper is only meaningful inside listen_* methods.
*/
extern bool internal_event_assignment (Stream_event **old_ev, Stream_event *new_ev, const char *function);
#define ASSIGN_EVENT_ONCE(o,n) internal_event_assignment (&o, n, __FUNCTION__)
#endif /* TRANSLATOR_ICC */
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