/*
- 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 <hanwen@xs4all.nl>
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.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
+ 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 <http://www.gnu.org/licenses/>.
+*/
#ifndef TRANSLATOR_HH
#define TRANSLATOR_HH
-#include "string.hh"
+#include "global-ctor.hh"
#include "lily-proto.hh"
#include "virtual-methods.hh"
-#include "scalar.hh"
-#include "dictionary.hh"
-#include "parray.hh"
-#include "input.hh"
+#include "callback.hh"
+#include "input.hh" // for error reporting
+#include "smobs.hh"
+#include "std-vector.hh"
+#include "protected-scm.hh"
+
+#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 (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 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 <void (NAME::*mf)()> \
+ static SCM method_finder () { return method_find_base<NAME, mf> (); } \
+ template <void (NAME::*callback)(Grob_info)> \
+ static SCM ack_finder () { return ack_find_base<NAME, callback> (); } \
+ /* 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.
+*/
-/** Make some kind of #Element#s from Requests. Elements are made by
- hierarchically grouped #Translator#s
- */
-class Translator : public Input {
+#define TRANSLATOR_DECLARATIONS(NAME) \
+ public: \
+ 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 ();
+
+#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 : public Smob<Translator>
+{
public:
- Music_output_def * output_def_l_;
- String type_str_;
+ int print_smob (SCM, scm_print_state *) const;
+ SCM mark_smob () const;
+ static const char type_p_name_[];
+ virtual ~Translator ();
+private:
+ void init ();
- bool is_alias_b (String) const;
-
+public:
+ Context *context () const { return daddy_context_; }
-
- VIRTUAL_COPY_CONS(Translator);
- Translator (Translator const &);
Translator ();
- virtual ~Translator ();
-
- Translator_group * daddy_trans_l_ ;
-
- void print () const;
-
- /**
- try to fit the request in this engraver
-
- @return
- false: not noted, not taken.
-
- true: request swallowed. Don't try to put the request elsewhere.
-
- */
- bool try_music (Music*);
- void pre_move_processing();
- void add_processing ();
- void creation_processing ();
- void process_requests();
- void post_move_processing();
- void removal_processing();
- /**
- ask daddy for a feature
- */
- Music_output_def *output_def_l () const;
- Scalar get_property (String, Translator_group **) const;
- virtual Moment now_mom () const;
-
-protected:
- enum {
- ORPHAN,
- VIRGIN,
- CREATION_INITED,
- MOVE_INITED,
- ACCEPTED_REQS,
- PROCESSED_REQS,
- ACKED_REQS,
- MOVE_DONE
- } status;
-
- /*
- @see{try_request}
- Default: always return false
- */
- virtual void do_add_processing ();
- virtual bool do_try_music (Music *req_l);
- virtual void do_print () const;
- virtual void do_pre_move_processing(){}
- virtual void do_post_move_processing(){}
- virtual void do_process_requests () {}
- virtual void do_creation_processing() {}
- virtual void do_removal_processing() {}
-};
+ Translator (Translator const &);
+ SCM internal_get_property (SCM symbol) const;
+
+ 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 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 ();
+ void process_acknowledged ();
+
+ Context *get_score_context () const;
+ Global_context *get_global_context () const;
+
+ 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 <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;
+ }
+
+ template <class T, void (T::*mf)()>
+ static SCM
+ method_find_base () { return Callback0_wrapper::make_smob<T, mf> (); }
+
+ // Fallback for non-overriden callbacks for which &T::x degrades to
+ // &Translator::x
+ template <void (Translator::*)()>
+ static SCM
+ method_finder () { return SCM_UNDEFINED; }
+
+ // Overriden in Engraver.
+ template <class T, void (T::*callback)(Grob_info)>
+ static SCM
+ ack_find_base () { return SCM_UNDEFINED; }
+
+ template <void (Translator::*)(Grob_info)>
+ static SCM
+ ack_finder () { return SCM_UNDEFINED; }
+
+ virtual void derived_mark () 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;
+};
-template<class T>
-class Translator_adder
+struct Acknowledge_information
{
-public:
- static Translator *ctor ()
- {
- T *t = new T;
- t->type_str_ = classname (t);
- return t;
- }
- Translator_adder () {
- add_constructor (ctor);
- }
+ SCM symbol_;
+ SCM function_;
+
+ Acknowledge_information ()
+ {
+ symbol_ = SCM_EOL;
+ function_ = SCM_UNDEFINED;
+ }
};
-/**
- A macro to automate administration of translators.
- */
-#define ADD_THIS_TRANSLATOR(c) \
- Translator_adder<c> _ ## c ## init;
-typedef Translator *(*Translator_ctor) ();
+void add_translator (Translator *trans);
-extern Dictionary<Translator*> *global_translator_dict_p;
-void add_translator (Translator*trans_p);
-void add_constructor (Translator_ctor ctor);
+Translator *get_translator (SCM s);
+Moment get_event_length (Stream_event *s, Moment now);
+Moment get_event_length (Stream_event *s);
-Translator*get_translator_l (String 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
projects / lilypond.git / blobdiff