/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 1997--2010 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 "input.hh" // for error reporting
+#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_;
-
- Acknowledge_information () {
- symbol_ = SCM_EOL;
- function_ = 0;
- }
-};
-
+#define TRANSLATOR_FAMILY_DECLARATIONS(NAME) \
+ public: \
+ VIRTUAL_COPY_CONSTRUCTOR (Translator, NAME); \
+ static Drul_array<vector<Acknowledge_information> > acknowledge_static_array_drul_; \
+ virtual void fetch_precomputable_methods (Callback methods[]); \
+ static Grob_info_callback static_get_acknowledger (SCM sym); \
+ static Grob_info_callback static_get_end_acknowledger(SCM); \
+ virtual Grob_info_callback get_acknowledger (SCM sym) \
+ { \
+ return static_get_acknowledger (sym); \
+ } \
+ virtual Grob_info_callback get_end_acknowledger (SCM sym) \
+ { \
+ return static_get_end_acknowledger (sym); \
+ } \
+ /* 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: \
- public: \
- NAME (); \
- VIRTUAL_COPY_CONSTRUCTOR (Translator, NAME); \
- 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) \
- { \
- return static_get_acknowledger (sym); \
- } \
- 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 \
- { \
- return listener_list_; \
- } \
+#define TRANSLATOR_DECLARATIONS(NAME) \
+ TRANSLATOR_FAMILY_DECLARATIONS(NAME) \
+ static SCM static_description_; \
+ static Protected_scm listener_list_; \
+public: \
+ NAME (); \
+ 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_TRANSLATOR_LISTENER(m) \
+public: \
+inline void listen_ ## m (Stream_event *); \
+/* Should be private */ \
+static void _internal_declare_ ## 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,
- STOP_TRANSLATION_TIMESTEP,
- PROCESS_MUSIC,
- PROCESS_ACKNOWLEDGED,
- TRANSLATOR_METHOD_PRECOMPUTE_COUNT,
- };
+{
+ START_TRANSLATION_TIMESTEP,
+ STOP_TRANSLATION_TIMESTEP,
+ PROCESS_MUSIC,
+ PROCESS_ACKNOWLEDGED,
+ TRANSLATOR_METHOD_PRECOMPUTE_COUNT,
+};
/*
Translate music into grobs.
*/
-class Translator
+class Translator : public Smob<Translator>
{
+public:
+ // We don't make Grob_info_callback specific to Engraver since we
+ // otherwise get into a circular mess with regard to the definitions
+ // as the timing of Engraver is exercised from within Translator
+ typedef void (Translator::*Grob_info_callback) (Grob_info);
+ typedef void (Translator::*Callback) (void);
+ int print_smob (SCM, scm_print_state *) const;
+ SCM mark_smob () const;
+ static const char type_p_name_[];
+ virtual ~Translator ();
+private:
void init ();
public:
virtual void initialize ();
virtual void finalize ();
- /* should maybe be virtual */
- void connect_to_context (Context *c);
- void disconnect_from_context (Context *c);
+ virtual void connect_to_context (Context *c);
+ virtual void disconnect_from_context (Context *c);
void stop_translation_timestep ();
void start_translation_timestep ();
Global_context *get_global_context () const;
TRANSLATOR_DECLARATIONS (Translator);
- DECLARE_SMOBS (Translator);
-protected: // should be private.
+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;
+ }
+
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);
- SCM static_translator_description (const char *grobs,
- const char *desc,
- translator_listener_record *listener_list,
- const char *read,
- const char *write) const;
+ static SCM event_class_symbol (const char *ev_class);
+ SCM static_translator_description (const char *grobs,
+ const char *desc,
+ SCM listener_list,
+ const char *read,
+ const char *write) const;
friend class Translator_group;
};
+struct Acknowledge_information
+{
+ SCM symbol_;
+ Translator::Grob_info_callback function_;
+
+ Acknowledge_information ()
+ {
+ symbol_ = SCM_EOL;
+ function_ = 0;
+ }
+};
+
+
void add_translator (Translator *trans);
Translator *get_translator (SCM s);
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.
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_HH
projects / lilypond.git / blobdiff