#ifndef CONTEXT_HH
#define CONTEXT_HH
-
-#include "std-vector.hh"
-#include "moment.hh"
+#include "context-key-manager.hh"
#include "lily-proto.hh"
+#include "listener.hh"
+#include "moment.hh"
+#include "std-vector.hh"
#include "virtual-methods.hh"
-#include "context-key-manager.hh"
class Context
{
private:
friend class Context_handle;
int iterator_count_;
- bool init_;
+
+ /* 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_;
Context_key_manager key_manager_;
SCM properties_scm_;
SCM aliases_;
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);
void clear_key_disambiguations ();
+ DECLARE_LISTENER (set_property_from_event);
+ DECLARE_LISTENER (unset_property_from_event);
public:
Object_key const *get_grob_key (string name);
Object_key const *get_context_key (string name, string id);
- Context *create_context (Context_def *, string, SCM);
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 (Object_key const *);
Context *where_defined (SCM name_sym, SCM *value) const;
void unset_property (SCM var_sym);
- 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;
Rational measure_length (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); \
+}
+
#endif /* CONTEXT_HH */