-/*
- context.hh -- declare Context
+/*
+ context.hh -- declare Context
- source file of the GNU LilyPond music typesetter
+ source file of the GNU LilyPond music typesetter
- (c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
- */
+ (c) 2004--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#ifndef CONTEXT_HH
#define CONTEXT_HH
-#include "moment.hh"
+#include "duration.hh"
#include "lily-proto.hh"
-
+#include "listener.hh"
+#include "moment.hh"
+#include "scm-hash.hh"
+#include "std-vector.hh"
+#include "virtual-methods.hh"
class Context
{
Scheme_hash_table *properties_dict () const;
Context (Context const &src);
-
- DECLARE_SMOBS (Context, dummy);
+ DECLARE_SMOBS (Context);
+ DECLARE_CLASSNAME(Context);
void terminate ();
-public:
+
+private:
+ friend class Context_handle;
+ int iterator_count_;
+
+ /* Used internally by create_context */
+ Stream_event *infant_event_;
+
+protected:
+ Context *daddy_context_;
+ /* The used Context_def */
SCM definition_;
+ /* Additions to the Context_def, given by \with */
+ SCM definition_mods_;
+
SCM properties_scm_;
SCM context_list_;
SCM accepts_list_;
SCM aliases_;
-
- Context * daddy_context_;
+ Translator_group *implementation_;
+ string id_string_;
+ /* Events reported in the context is sent to this dispatcher. */
+ Dispatcher *event_source_;
+
+ /* Events reported to this context or recursively in any of its
+ children, are sent to this dispatcher. */
+ Dispatcher *events_below_;
+
+ // Translator_group is allowed to set implementation_.
+ friend class Translator_group;
+ // Context_def::instantiate initialises some protected members.
+ friend class Context_def;
+ // UGH! initialises implementation_
+ friend SCM ly_make_global_translator (SCM);
+
+ DECLARE_LISTENER (set_property_from_event);
+ DECLARE_LISTENER (unset_property_from_event);
+
+public:
+ string id_string () const { return id_string_; }
+ SCM children_contexts () const { return context_list_; }
+ SCM default_child_context_name () const;
+
+ Dispatcher *event_source () const { return event_source_; }
+ Dispatcher *events_below () const { return events_below_; }
+ void internal_send_stream_event (SCM type, Input *origin, SCM props[]);
+
+ SCM get_definition () const { return definition_; }
+ SCM get_definition_mods () const { return definition_mods_; }
+
+ Translator_group *implementation () const { return implementation_; }
+ Context *get_parent_context () const;
Context ();
- void execute_pushpop_property (SCM prop, SCM sym, SCM val);
+
+ /* properties: */
SCM internal_get_property (SCM name_sym) const;
+ SCM properties_as_alist () const;
+ Context *where_defined (SCM name_sym, SCM *value) const;
+ void unset_property (SCM var_sym);
+
+ void instrumented_set_property (SCM, SCM, const char*, int, const char*);
+ void internal_set_property (SCM var_sym, SCM value);
- Context *remove_context (Context*trans);
+ Context *create_context (Context_def *, string, SCM);
+ DECLARE_LISTENER (create_context_from_event);
+ DECLARE_LISTENER (acknowledge_infant);
+ DECLARE_LISTENER (remove_context);
+ DECLARE_LISTENER (change_parent);
+ void disconnect_from_parent ();
void check_removal ();
+ string context_name () const;
+ SCM context_name_symbol () const;
+ Global_context *get_global_context () const;
- SCM properties_as_alist () const;
- void unset_property (SCM var_sym);
- void internal_set_property (SCM var_sym, SCM value);
+ virtual Context *get_score_context () const;
+ virtual Output_def *get_output_def () const;
+ virtual Moment now_mom () const;
+ virtual Context *get_default_interpreter ();
- Context *where_defined (SCM name_sym) const;
- String context_name () const;
- Global_context * get_global_context () const;
-
- virtual Score_context * get_score_context () const;
bool is_alias (SCM) const;
- void add_alias (SCM);
+ void add_alias (SCM);
void add_context (Context *trans);
bool is_bottom_context () const;
bool is_removable () const;
- bool try_music (Music *);
-
- virtual Music_output_def *get_output_def () const;
- virtual Moment now_mom () const;
- Context *find_existing_context (SCM context_name, String id);
- Context *find_create_context (SCM context_name,
- String id, SCM ops);
- Link_array<Context> path_to_acceptable_context (SCM alias,
- Music_output_def*) const;
- Context *get_default_interpreter ();
- String id_string_;
- SCM implementation_;
-private:
- friend class Interpretation_context_handle;
- int iterator_count_;
- bool init_;
+ Context *find_create_context (SCM context_name,
+ string id, SCM ops);
+ Context *create_unique_context (SCM context_name, string context_id,
+ SCM ops);
+ vector<Context_def*> path_to_acceptable_context (SCM alias) const;
};
/*
- Context arg?
- */
-
-void apply_property_operations (Context*tg, SCM pre_init_ops);
-void execute_pushpop_property (Context * trg, SCM prop, SCM eltprop, SCM val);
-SCM updated_grob_properties (Context* tg, SCM sym);
-Context * find_context_below (Context * where,
- String type, String id);
-bool melisma_busy (Context*);
+ Context arg?
+*/
+
+void apply_property_operations (Context *tg, SCM pre_init_ops);
+void execute_revert_property (Context *context,
+ SCM context_property,
+ SCM grob_property_path);
+void execute_pushpop_property (Context *trg, SCM prop, SCM eltprop, SCM val);
+void sloppy_general_pushpop_property (Context *context,
+ SCM context_property, SCM grob_property_path, SCM val);
+SCM updated_grob_properties (Context *tg, SCM sym);
+Context *find_context_below (Context *where,
+ SCM type_sym, string id);
+bool melisma_busy (Context *);
Context *get_voice_to_lyrics (Context *lyrics);
-Grob *get_current_note_head (Context * voice);
-Context *unsmob_context (SCM);
-
-DECLARE_UNSMOB(Context,context);
+Grob *get_current_note_head (Context *voice);
+Grob *get_current_rest (Context *voice);
+DECLARE_UNSMOB (Context, context);
+
+Moment measure_position (Context const *context);
+Moment measure_position (Context const *context, Duration const *dur);
+Rational measure_length (Context const *context);
+int measure_number (Context const *context);
+void set_context_property_on_children (Context *trans, SCM sym, SCM val);
+
+/* Shorthand for creating and broadcasting stream events. */
+#define send_stream_event(ctx, type, origin, ...) \
+{ \
+ SCM props[] = { __VA_ARGS__, 0 }; \
+ ctx->internal_send_stream_event (ly_symbol2scm (type), origin, props); \
+}
+
+SCM nested_property_alist (SCM alist, SCM prop_path, SCM value);
+SCM nested_property_revert_alist (SCM alist, SCM prop_path);
+SCM evict_from_alist (SCM, SCM, SCM);
#endif /* CONTEXT_HH */
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