Merge branch 'jneeman' of git+ssh://jneem@git.sv.gnu.org/srv/git/lilypond into jneeman

[lilypond.git] / lily / include / context.hh

diff --git a/lily/include/context.hh b/lily/include/context.hh
index 4b85bd31cdc5136d973a2dbec5eef15843e9715b..8eba283027a8811e6bfa04b7396fe5b11c749d81 100644 (file)
--- a/lily/include/context.hh
+++ b/lily/include/context.hh
@@ -9,31 +9,34 @@
 #ifndef CONTEXT_HH
 #define CONTEXT_HH
 
-
-#include "std-vector.hh"
+#include "context-key-manager.hh"
+#include "listener.hh"
 #include "moment.hh"
-#include "lily-proto.hh"
+#include "std-vector.hh"
 #include "virtual-methods.hh"
-#include "context-key-manager.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 ();
 
 private:
   friend class Context_handle;
   int iterator_count_;
-  bool init_;
+  
+  /* Used internally by create_context */
+  Stream_event *infant_event_;
 
 protected:
-  int unique_;
   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_;
@@ -42,20 +45,39 @@ protected:
   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;
-  int get_unique() { return unique_; }
+
+  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;
@@ -64,17 +86,27 @@ public:
   /* properties:  */
   SCM internal_get_property (SCM name_sym) const;
   SCM properties_as_alist () const;
-  void internal_set_property (SCM var_sym, SCM value);
   Context *where_defined (SCM name_sym, SCM *value) const;
   void unset_property (SCM var_sym);
 
-  Context *remove_context (Context *trans);
+#ifndef NDEBUG
+  void internal_set_property (SCM var_sym, SCM value, char const *file, int line, char const *fun);
+#else
+  void internal_set_property (SCM var_sym, SCM value);
+#endif
+
+  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;
 
-  virtual Score_context *get_score_context () const;
+  virtual Context *get_score_context () const;
   virtual Output_def *get_output_def () const;
   virtual Moment now_mom () const;
   virtual Context *get_default_interpreter ();
@@ -84,7 +116,6 @@ public:
   void add_context (Context *trans);
   bool is_bottom_context () const;
   bool is_removable () const;
-  bool try_music (Music *);
 
   Context *find_create_context (SCM context_name,
                                string id, SCM ops);
@@ -116,5 +147,12 @@ Moment measure_position (Context const *context);
 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 */