X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;ds=sidebyside;f=lily%2Finclude%2Ftranslator.hh;h=ad8765fd54c1bf902b83c14f12d0ef2c5795c6ef;hb=0c538805488f6a6c134fe88ccef58995037535e9;hp=858af4ce21454b4a6b710811c269cdb022b0626a;hpb=40aac0ae57ee113faa860ba221d83d9e6312173e;p=lilypond.git diff --git a/lily/include/translator.hh b/lily/include/translator.hh index 858af4ce21..ad8765fd54 100644 --- a/lily/include/translator.hh +++ b/lily/include/translator.hh @@ -1,7 +1,7 @@ /* This file is part of LilyPond, the GNU music typesetter. - Copyright (C) 1997--2014 Han-Wen Nienhuys + Copyright (C) 1997--2015 Han-Wen Nienhuys LilyPond is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -23,71 +23,59 @@ #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_; - - Acknowledge_information () - { - symbol_ = SCM_EOL; - function_ = 0; - } -}; - -/* - 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. -*/ -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_FAMILY_DECLARATIONS(NAME) \ public: \ - NAME (); \ VIRTUAL_COPY_CONSTRUCTOR (Translator, NAME); \ - static SCM static_description_; \ static Drul_array > 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) \ + virtual void fetch_precomputable_methods (SCM methods[]); \ + DECLARE_TRANSLATOR_CALLBACKS (NAME); \ + TRANSLATOR_INHERIT (Translator) \ + static SCM static_get_acknowledger (SCM sym); \ + static SCM static_get_end_acknowledger(SCM); \ + virtual SCM get_acknowledger (SCM sym) \ { \ return static_get_acknowledger (sym); \ } \ - virtual Engraver_void_function_engraver_grob_info get_end_acknowledger (SCM sym) \ + virtual SCM get_end_acknowledger (SCM sym) \ { \ return static_get_end_acknowledger (sym); \ - } \ + } \ /* end #define */ +#define TRANSLATOR_INHERIT(BASE) \ + using BASE::method_finder; \ + using BASE::ack_finder; + +#define DECLARE_TRANSLATOR_CALLBACKS(NAME) \ + template \ + static SCM method_finder () { return method_find_base (); } \ + template \ + static SCM ack_finder () { return ack_find_base (); } \ + /* end #define */ + +/* + 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. +*/ + #define TRANSLATOR_DECLARATIONS(NAME) \ - TRANSLATOR_DECLARATIONS_NO_LISTENER(NAME) \ -private: \ - static translator_listener_record *listener_list_; \ + public: \ + TRANSLATOR_FAMILY_DECLARATIONS (NAME); \ + static SCM static_description_; \ + static Protected_scm listener_list_; \ public: \ - virtual translator_listener_record *get_listener_list () const \ + NAME (); \ + virtual SCM static_translator_description () const; \ + virtual SCM translator_description () const; \ + virtual SCM get_listener_list () const \ { \ return listener_list_; \ } \ @@ -97,10 +85,7 @@ public: \ 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); +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: @@ -117,13 +102,20 @@ enum Translator_precompute_index /* Translate music into grobs. */ -class Translator +class Translator : public Smob { +public: + int print_smob (SCM, scm_print_state *) const; + SCM mark_smob () const; + static const char 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; @@ -147,32 +139,78 @@ public: 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) = 0; + virtual SCM get_end_acknowledger (SCM sym) = 0; protected: // should be private. Context *daddy_context_; void protect_event (SCM ev); + + template + static SCM trampoline (SCM target, SCM event) + { + T *t = unsmob (target); + LY_ASSERT_SMOB (T, target, 1); + LY_ASSERT_SMOB (Stream_event, event, 2); + + t->protect_event (event); + (t->*callback) (unsmob (event)); + return SCM_UNSPECIFIED; + } + + template + static SCM + method_find_base () { return Callback0_wrapper::make_smob (); } + + // Fallback for non-overriden callbacks for which &T::x degrades to + // &Translator::x + template + static SCM + method_finder () { return SCM_UNDEFINED; } + + // Overriden in Engraver. + template + static SCM + ack_find_base () { return SCM_UNDEFINED; } + + template + static SCM + ack_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; friend class Translator_group; }; +struct Acknowledge_information +{ + SCM symbol_; + SCM function_; + + Acknowledge_information () + { + symbol_ = SCM_EOL; + function_ = SCM_UNDEFINED; + } +}; + + 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.