X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Ftactics%2FstatefulProofEngine.mli;h=4198876ca239b4e191395fbac58efc788b0801d9;hb=97c2d258a5c524eb5c4b85208899d80751a2c82f;hp=9a4cf78254aad02a17342b2c1974d787eed0bccb;hpb=e4b873cd8511753e65319d02fcdd5473214f42a5;p=helm.git

diff --git a/helm/ocaml/tactics/statefulProofEngine.mli b/helm/ocaml/tactics/statefulProofEngine.mli
index 9a4cf7825..4198876ca 100644
--- a/helm/ocaml/tactics/statefulProofEngine.mli
+++ b/helm/ocaml/tactics/statefulProofEngine.mli
@@ -28,19 +28,22 @@
 exception No_goal_left
 exception Uri_redefinition
 
-  (** can't undo/redo one or more actions *)
-exception History_failure
-
 type event = [ `Proof_changed | `Proof_completed ]
 
+val all_events: event list
+
+  (** from our point of view a status is the status of an incomplete proof, thus
+  * we have an optional goal which is None if the proof is not yet completed
+  * (i.e. some goal is still open) *)
+type proof_status = ProofEngineTypes.proof * ProofEngineTypes.goal option
+
   (** Proof observer. First callback argument is Some extended_status
   * when a 'real 'change of the proof happened and None when Proof_changed event
-  * was triggered by a time travel by the means of undo/redo actions. Embedded
-  * status is the status _before_ the current change. Second status is the
-  * status reached _after_ the current change. *)
-type 'a observer =
-  (ProofEngineTypes.status * 'a) option -> (ProofEngineTypes.status * 'a) ->
-    unit
+  * was triggered by a time travel by the means of undo/redo actions or by an
+  * external "#notify" invocation. Embedded status is the status _before_ the
+  * current change. Second status is the status reached _after_ the current
+  * change. *)
+type 'a observer = (proof_status * 'a) option -> (proof_status * 'a) -> unit
 
   (** needed to detach previously attached observers *)
 type observer_id
@@ -57,10 +60,11 @@ exception Data_failure of exn
 (** {2 OO interface} *)
 
 class ['a] status:
+  ?history_size:int ->  (** default 20 *)
   ?uri:UriManager.uri ->
-  typ:Cic.term -> ?body:Cic.term -> ?metasenv:Cic.metasenv ->
-  (ProofEngineTypes.proof * ProofEngineTypes.goal option -> 'a) ->
-  (ProofEngineTypes.status * 'a -> ProofEngineTypes.status -> 'a) ->
+  typ:Cic.term -> body:Cic.term -> metasenv:Cic.metasenv ->
+  (proof_status -> 'a) -> (* init data *)
+  (proof_status * 'a -> proof_status -> 'a) ->  (* update data *)
   unit ->
   object
 
@@ -69,13 +73,16 @@ class ['a] status:
     method body: Cic.term
     method typ: Cic.term
 
+    (** change metasenv _without_ triggering any notification *)
+    method set_metasenv: Cic.metasenv -> unit
+
     (** goal -> conjecture
     * @raise CicUtil.Meta_not_found *)
     method conjecture: int -> Cic.conjecture
 
     method proof_completed: bool
     method goal: int              (** @raise No_goal_left *)
-    method set_goal: int -> unit  (** @raise No_goal_left *)
+    method set_goal: int -> unit  (** @raise Data_failure *)
 
     method uri: UriManager.uri option
     method set_uri: UriManager.uri -> unit  (** @raise Uri_redefinition *)
@@ -100,11 +107,14 @@ class ['a] status:
 
     method detach_observer: observer_id -> unit
 
+    (** force a notification to all observer, old status is passed as None *)
+    method notify: unit
+
   end
 
 val trivial_status:
   ?uri:UriManager.uri ->
-  typ:Cic.term -> ?body:Cic.term -> ?metasenv:Cic.metasenv ->
+  typ:Cic.term -> body:Cic.term -> metasenv:Cic.metasenv ->
   unit ->
     unit status