source file of the GNU LilyPond music typesetter
- (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-
#ifndef TRANSLATOR_HH
#define TRANSLATOR_HH
#include "global-ctor.hh"
-#include "string.hh"
#include "lily-proto.hh"
#include "virtual-methods.hh"
-#include "lily-guile.hh"
-#include "input.hh"
+#include "input.hh" // for error reporting
#include "smobs.hh"
+#include "std-vector.hh"
+#include "protected-scm.hh"
-#define get_property(x) internal_get_property(ly_symbol2scm(x))
+struct Acknowledge_information
+{
+ SCM symbol_;
+ Engraver_void_function_engraver_grob_info function_;
+};
-#define TRANSLATOR_DECLARATIONS(NAME) \
+/*
+ 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_;
+ struct translator_listener_record *next_;
+} translator_listener_record;
+
+#define TRANSLATOR_DECLARATIONS(NAME) \
+private: \
+ static translator_listener_record *listener_list_; \
+ 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; \
+ 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); \
+ } \
+ static Engraver_void_function_engraver_grob_info static_get_acknowledger (SCM sym); \
+ static Engraver_void_function_engraver_grob_info static_get_end_acknowledger(SCM); \
+public: \
+ virtual translator_listener_record *get_listener_list () const \
+ { \
+ return listener_list_; \
+ } \
+ /* end #define */
+
+#define DECLARE_TRANSLATOR_LISTENER(m) \
public: \
- NAME();\
- VIRTUAL_COPY_CONS (Translator); \
- static SCM static_description_; \
- virtual SCM static_translator_description () const; \
- virtual SCM translator_description () const;
+inline void listen_ ## m (Stream_event *); \
+/* Should be private */ \
+static void _internal_declare_ ## m (); \
+private: \
+static Listener _get_ ## m ## _listener (void *); \
+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,
+ };
/*
Translate music into grobs.
class Translator
{
void init ();
-public:
- Music_output_def * output_def_;
- String type_string_;
-
- bool is_alias_b (String) const;
-
- Translator (Translator const &);
+protected:
+ bool must_be_last_;
-
- Translator_group * daddy_trans_ ;
- void removal_processing ();
- /**
- ask daddy for a feature
- */
- Music_output_def *get_output_def () const;
+public:
+ bool must_be_last () const;
- SCM internal_get_property (SCM symbol) const;
-
- virtual Moment now_mom () const;
-
- /*
- ugh: bubbled up from Translator_group.
- */
- SCM simple_trans_list_;
- SCM trans_group_list_;
- SCM definition_;
-
- SCM properties_scm_;
- DECLARE_SMOBS (Translator, dummy);
+ Context *context () const { return daddy_context_; }
-public:
- TRANSLATOR_DECLARATIONS(Translator);
- /**
- try to fit the request in this engraver
+ Translator (Translator const &);
- @return
- false: not noted, not taken.
+ SCM internal_get_property (SCM symbol) const;
- true: request swallowed. Don't try to put the request elsewhere.
+ virtual Output_def *get_output_def () const;
+ virtual Translator_group *get_daddy_translator ()const;
+ virtual Moment now_mom () const;
- */
- virtual bool try_music (Music *req);
- virtual void stop_translation_timestep ();
- virtual void start_translation_timestep ();
- virtual void do_announces () ;
- virtual void initialize () ;
+ virtual void initialize ();
virtual void finalize ();
+
+ /*should maybe be virtual*/
+ void connect_to_context (Context *c);
+ void disconnect_from_context (Context *c);
+
+ void stop_translation_timestep ();
+ void start_translation_timestep ();
+ void process_music ();
+ void process_acknowledged ();
+
+ Context *get_score_context () const;
+ Global_context *get_global_context () const;
+
+ TRANSLATOR_DECLARATIONS (Translator);
+ DECLARE_SMOBS (Translator);
+
+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 *), 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);
+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__)
-/**
- A macro to automate administration of translators.
- */
-#define ADD_THIS_TRANSLATOR(T) \
-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_);\
- t->type_string_ = classname (t);\
- add_translator (t);\
-}\
-SCM T::translator_description() const\
-{ \
- return static_description_;\
-}\
-ADD_GLOBAL_CTOR (_ ## T ## _adder);
-
-
-
-
-#define ENTER_DESCRIPTION(classname,desc,grobs,acked,read,write) \
-ADD_THIS_TRANSLATOR (classname);\
-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"), \
- ly_str02scm (desc), static_properties); \
- \
- static_properties= scm_acons (ly_symbol2scm ("interfaces-acked"), \
- parse_symbol_list (acked), 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; \
-}
-
-
-
-extern Dictionary<Translator*> *global_translator_dict;
-void add_translator (Translator*trans);
-
-Translator*get_translator (String s);
-DECLARE_UNSMOB(Translator,translator);
#endif // TRANSLATOR_HH
projects / lilypond.git / blobdiff