/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 1997--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
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 "global-ctor.hh"
#include "lily-proto.hh"
#include "virtual-methods.hh"
+#include "callback.hh"
#include "input.hh" // for error reporting
#include "smobs.hh"
#include "std-vector.hh"
#include "protected-scm.hh"
-struct Acknowledge_information
-{
- SCM symbol_;
- Engraver_void_function_engraver_grob_info function_;
+#define TRANSLATOR_FAMILY_DECLARATIONS(NAME) \
+ public: \
+ VIRTUAL_COPY_CONSTRUCTOR (Translator, NAME); \
+ virtual void fetch_precomputable_methods (SCM methods[]); \
+ DECLARE_TRANSLATOR_CALLBACKS (NAME); \
+ TRANSLATOR_INHERIT (Translator); \
+ /* end #define */
- Acknowledge_information ()
- {
- symbol_ = SCM_EOL;
- function_ = 0;
- }
-};
+#define TRANSLATOR_INHERIT(BASE) \
+ using BASE::method_finder
+
+#define DECLARE_TRANSLATOR_CALLBACKS(NAME) \
+ template <void (NAME::*mf)()> \
+ static SCM method_finder () { return method_find_base<NAME, mf> (); } \
+ /* end #define */
/*
- Each translator class has a static list of listener records. Each
- record makes one explains how to register one of the class's stream event
- listeners to a context.
+ Each translator class has a static alist of event class symbols
+ mapping to callbacks that are called with a translator instance and
+ a stream event when an event of the appropriate event class is
+ announced in a context.
*/
-typedef struct translator_listener_record
-{
- Listener (*get_listener_) (void *, SCM event_class);
- SCM event_class_;
- struct translator_listener_record *next_;
- translator_listener_record ()
- {
- next_ = 0;
- event_class_ = SCM_EOL;
- get_listener_ = 0;
- }
-
-} translator_listener_record;
-
-#define TRANSLATOR_DECLARATIONS_NO_LISTENER(NAME) \
-private: \
+#define TRANSLATOR_DECLARATIONS(NAME) \
public: \
- NAME (); \
- VIRTUAL_COPY_CONSTRUCTOR (Translator, NAME); \
+ TRANSLATOR_FAMILY_DECLARATIONS (NAME); \
+ static Drul_array<Protected_scm> acknowledge_static_array_drul_; \
static SCM static_description_; \
- static Drul_array<vector<Acknowledge_information> > acknowledge_static_array_drul_; \
- virtual void fetch_precomputable_methods (Translator_void_method_ptr methods[]); \
- virtual SCM static_translator_description () const; \
- virtual SCM translator_description () const; \
- static Engraver_void_function_engraver_grob_info static_get_acknowledger (SCM sym); \
- static Engraver_void_function_engraver_grob_info static_get_end_acknowledger(SCM); \
- virtual Engraver_void_function_engraver_grob_info get_acknowledger (SCM sym) \
+ static Protected_scm listener_list_; \
+ static SCM static_get_acknowledger (SCM sym, Direction start_end); \
+ virtual SCM get_acknowledger (SCM sym, Direction start_end) \
{ \
- return static_get_acknowledger (sym); \
+ return static_get_acknowledger (sym, start_end); \
} \
- virtual Engraver_void_function_engraver_grob_info get_end_acknowledger (SCM sym) \
- { \
- return static_get_end_acknowledger (sym); \
- } \
- /* end #define */
-
-#define TRANSLATOR_DECLARATIONS(NAME) \
- TRANSLATOR_DECLARATIONS_NO_LISTENER(NAME) \
-private: \
- static translator_listener_record *listener_list_; \
public: \
- virtual translator_listener_record *get_listener_list () const \
+ NAME (); \
+ static void boot (); \
+ virtual SCM static_translator_description () const; \
+ virtual SCM translator_description () const; \
+ virtual SCM get_listener_list () const \
{ \
return listener_list_; \
} \
/* end #define */
-#define DECLARE_TRANSLATOR_LISTENER(m) \
-public: \
-inline void listen_ ## m (Stream_event *); \
-/* Should be private */ \
-static void _internal_declare_ ## m (); \
-private: \
- static Listener _get_ ## m ## _listener (void *, SCM); \
-DECLARE_LISTENER (_listen_scm_ ## m);
-
-#define DECLARE_ACKNOWLEDGER(x) public : void acknowledge_ ## x (Grob_info); protected:
-#define DECLARE_END_ACKNOWLEDGER(x) public : void acknowledge_end_ ## x (Grob_info); protected:
-
enum Translator_precompute_index
{
START_TRANSLATION_TIMESTEP,
/*
Translate music into grobs.
*/
-class Translator
+class Translator : public Smob<Translator>
{
+public:
+ int print_smob (SCM, scm_print_state *) const;
+ SCM mark_smob () const;
+ static const char * const type_p_name_;
+ virtual ~Translator ();
+private:
void init ();
public:
Context *context () const { return daddy_context_; }
+ Translator ();
Translator (Translator const &);
SCM internal_get_property (SCM symbol) const;
Context *get_score_context () const;
Global_context *get_global_context () const;
- TRANSLATOR_DECLARATIONS (Translator);
- DECLARE_SMOBS (Translator);
+ DECLARE_CLASSNAME (Translator);
+ virtual Translator *clone () const = 0;
+ virtual void fetch_precomputable_methods (SCM methods[]) = 0;
+ virtual SCM get_listener_list () const = 0;
+ virtual SCM translator_description () const = 0;
+ virtual SCM get_acknowledger (SCM sym, Direction start_end) = 0;
protected: // should be private.
Context *daddy_context_;
void protect_event (SCM ev);
+
+ template <class T, void (T::*callback)(Stream_event *)>
+ static SCM trampoline (SCM target, SCM event)
+ {
+ T *t = unsmob<T> (target);
+ LY_ASSERT_SMOB (T, target, 1);
+ LY_ASSERT_SMOB (Stream_event, event, 2);
+
+ t->protect_event (event);
+ (t->*callback) (unsmob<Stream_event> (event));
+ return SCM_UNSPECIFIED;
+ }
+
+ template <class T, void (T::*mf)()>
+ static SCM
+ method_find_base () { return Callback0_wrapper::make_smob<T, mf> (); }
+
+ // Fallback for non-overriden callbacks for which &T::x degrades to
+ // &Translator::x
+ template <void (Translator::*)()>
+ static SCM
+ method_finder () { return SCM_UNDEFINED; }
+
virtual void derived_mark () const;
- static void add_translator_listener (translator_listener_record **listener_list,
- translator_listener_record *r,
- Listener (*get_listener) (void *, SCM),
- const char *ev_class);
+ static SCM event_class_symbol (const char *ev_class);
SCM static_translator_description (const char *grobs,
const char *desc,
- translator_listener_record *listener_list,
+ SCM listener_list,
const char *read,
const char *write) const;
void add_translator (Translator *trans);
Translator *get_translator (SCM s);
+
+SCM
+generic_get_acknowledger (SCM sym, SCM ack_hash);
+
Moment get_event_length (Stream_event *s, Moment now);
Moment get_event_length (Stream_event *s);
-DECLARE_UNSMOB (Translator, translator);
/*
This helper is only meaningful inside listen_* methods.
projects / lilypond.git / blobdiff