/*
- 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--2006 Han-Wen Nienhuys <hanwen@xs4all.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 "global-ctor.hh"
-#include "std-string.hh"
#include "lily-proto.hh"
#include "virtual-methods.hh"
-#include "input.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_;
-};
-
-#define TRANSLATOR_DECLARATIONS(NAME) \
- public: \
- NAME (); \
- VIRTUAL_COPY_CONSTRUCTOR (Translator, NAME); \
- static SCM static_description_; \
+#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 (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); \
+ 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.
+*/
+
+#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,
- };
+{
+ START_TRANSLATION_TIMESTEP,
+ STOP_TRANSLATION_TIMESTEP,
+ PROCESS_MUSIC,
+ PROCESS_ACKNOWLEDGED,
+ TRANSLATOR_METHOD_PRECOMPUTE_COUNT,
+};
/*
Translate music into grobs.
*/
-class Translator
+class Translator : public Smob<Translator>
{
+public:
+ int print_smob (SCM, scm_print_state *) const;
+ SCM mark_smob () const;
+ 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 (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 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 ();
void process_acknowledged ();
- Score_context *get_score_context () const;
+ Context *get_score_context () const;
Global_context *get_global_context () const;
- TRANSLATOR_DECLARATIONS (Translator);
- DECLARE_SMOBS (Translator, dummy);
+ 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.
+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;
+};
+
+struct Acknowledge_information
+{
+ SCM symbol_;
+ SCM function_;
- friend class Context_def;
- friend class Context;
+ Acknowledge_information ()
+ {
+ symbol_ = SCM_EOL;
+ function_ = SCM_UNDEFINED;
+ }
};
+
+
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
projects / lilypond.git / blobdiff