source file of the GNU LilyPond music typesetter
- (c) 1997--2005 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 "input.hh"
+#include "input.hh" // for error reporting
#include "smobs.hh"
+#include "std-vector.hh"
+#include "protected-scm.hh"
struct Acknowledge_information
{
Engraver_void_function_engraver_grob_info function_;
};
-#define TRANSLATOR_DECLARATIONS(NAME) \
- public: \
- NAME (); \
- VIRTUAL_COPY_CONSTRUCTOR (Translator, NAME); \
- static SCM static_description_; \
- static Array<Acknowledge_information> acknowledge_static_array_; \
- 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);\
- }\
- static Engraver_void_function_engraver_grob_info static_get_acknowledger (SCM sym);
-
-#define DECLARE_ACKNOWLEDGER(x) public: void acknowledge_ ## x (Grob_info); protected:
-
-enum Translator_precompute_index {
- START_TRANSLATION_TIMESTEP,
- STOP_TRANSLATION_TIMESTEP,
- PROCESS_MUSIC,
- PROCESS_ACKNOWLEDGED,
- TRANSLATOR_METHOD_PRECOMPUTE_COUNT,
-};
-
-/* nothing */
-#define PRECOMPUTED_VIRTUAL
+/*
+ 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: \
+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 ();
-
+
protected:
bool must_be_last_;
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 initialize ();
virtual void finalize ();
- PRECOMPUTED_VIRTUAL void stop_translation_timestep ();
- PRECOMPUTED_VIRTUAL void start_translation_timestep ();
- PRECOMPUTED_VIRTUAL void process_music ();
- PRECOMPUTED_VIRTUAL void process_acknowledged ();
-
- Score_context *get_score_context () const;
+ /*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, dummy);
+ DECLARE_SMOBS (Translator);
protected: // should be private.
Context *daddy_context_;
+ void protect_event (SCM ev);
virtual void derived_mark () const;
-
- friend class Context_def;
- friend class Context;
+ 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__)
+
+
#endif // TRANSLATOR_HH
projects / lilypond.git / blobdiff