X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Finclude%2Ftranslator.hh;h=d342d3363cbcfb03c1159c1d57eb894f287a85d7;hb=47db9a3883d726ca53e2133a3b2298f78dd6a32e;hp=442942932112066b514cf3be7985e74aff22a18f;hpb=e09265d8e9ad94714076ca91e63eab5c55679286;p=lilypond.git diff --git a/lily/include/translator.hh b/lily/include/translator.hh index 4429429321..d342d3363c 100644 --- a/lily/include/translator.hh +++ b/lily/include/translator.hh @@ -1,75 +1,133 @@ /* - translator.hh -- declare Translator + This file is part of LilyPond, the GNU music typesetter. - source file of the GNU LilyPond music typesetter + Copyright (C) 1997--2015 Han-Wen Nienhuys - (c) 1997--2006 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 + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + LilyPond is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with LilyPond. If not, see . */ #ifndef TRANSLATOR_HH #define TRANSLATOR_HH #include "global-ctor.hh" -#include "std-string.hh" #include "lily-proto.hh" #include "virtual-methods.hh" -#include "input.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; + } }; -#define TRANSLATOR_DECLARATIONS(NAME) \ - public: \ - NAME (); \ - VIRTUAL_COPY_CONSTRUCTOR (Translator, NAME); \ - static SCM static_description_; \ +/* + 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: \ + 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; \ + 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); \ - } \ + { \ + return static_get_acknowledger (sym); \ + } \ virtual Engraver_void_function_engraver_grob_info get_end_acknowledger (SCM sym) \ - { \ - return static_get_end_acknowledger (sym); \ + { \ + return static_get_end_acknowledger (sym); \ } \ - static Engraver_void_function_engraver_grob_info static_get_acknowledger (SCM sym); \ - static Engraver_void_function_engraver_grob_info static_get_end_acknowledger(SCM); \ /* 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_; \ + } \ + /* 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, - 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 { +public: + int print_smob (SCM, scm_print_state *); + SCM mark_smob (); + static const char type_p_name_[]; + virtual ~Translator (); +private: void init (); -protected: - bool must_be_last_; - public: - bool must_be_last () const; - Context *context () const { return daddy_context_; } Translator (Translator const &); @@ -79,11 +137,14 @@ public: virtual Output_def *get_output_def () const; virtual Translator_group *get_daddy_translator ()const; virtual Moment now_mom () const; + virtual bool must_be_last () const; - virtual bool try_music (Music *req); virtual void initialize (); virtual void finalize (); + virtual void connect_to_context (Context *c); + virtual void disconnect_from_context (Context *c); + void stop_translation_timestep (); void start_translation_timestep (); void process_music (); @@ -93,16 +154,34 @@ public: Global_context *get_global_context () const; TRANSLATOR_DECLARATIONS (Translator); - DECLARE_SMOBS (Translator, dummy); -protected: // should be private. +protected: // should be private. Context *daddy_context_; + void protect_event (SCM ev); 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; friend class Translator_group; }; + void add_translator (Translator *trans); Translator *get_translator (SCM s); -DECLARE_UNSMOB (Translator, translator); +Moment get_event_length (Stream_event *s, Moment now); +Moment get_event_length (Stream_event *s); + +/* + 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