+type hist_metadata =
+ Cic.annobj *
+ (Cic.id, Cic.term) Hashtbl.t *
+ (Cic.id, Cic.id option) Hashtbl.t *
+ (Cic.id, string) Hashtbl.t *
+ (Cic.id, Cic2acic.anntypes) Hashtbl.t *
+ (Cic.id, Cic.conjecture) Hashtbl.t *
+ (Cic.id, Cic.hypothesis) Hashtbl.t
+
+class type proof =
+ object
+ inherit [hist_metadata] StatefulProofEngine.status
+
+ (** return a pair of "xml" (as defined in Xml module) representing the *
+ * current proof type and body, respectively *)
+ method toXml: Xml.token Stream.t * Xml.token Stream.t
+ method toString: string
+ end
+
+type proof_handler =
+ { get_proof: unit -> proof; (* return current proof or fail *)
+ set_proof: proof option -> unit; (* set a proof option as current proof *)
+ has_proof: unit -> bool; (* check if a current proof is available or not *)
+ new_proof: proof -> unit; (* as a set_proof but takes care also to register
+ observers *)
+ quit: unit -> unit
+ }
+
+ (** interpreter for toplevel phrases given via console *)
+class type interpreter =
+ object
+ method evalPhrase: string -> unit
+ end
+
+(** {2 MathML widgets} *)
+
+type mml_of_cic_sequent =
+ Cic.metasenv -> int * Cic.context * Cic.term ->
+ Gdome.document *
+ ((Cic.id, Cic.term) Hashtbl.t *
+ (Cic.id, Cic.id option) Hashtbl.t *
+ (string, Cic.hypothesis) Hashtbl.t)
+
+type mml_of_cic_object =
+ explode_all:bool -> UriManager.uri -> Cic.annobj ->
+ (string, string) Hashtbl.t -> (string, Cic2acic.anntypes) Hashtbl.t ->
+ Gdome.document
+
+ (** TODO Zack to be reviewed and unified with proof_viewer above *)
+class type sequent_viewer =
+ object
+ inherit GMathViewAux.multi_selection_math_view
+
+ (** @return the list of selected terms. Selections which are not terms are
+ * ignored *)
+ method get_selected_terms: Cic.term list
+
+ (** @return the list of selected hypothese. Selections which are not
+ * hypotheses are ignored *)
+ method get_selected_hypotheses: Cic.hypothesis list
+
+ (** load a sequent and render it into parent widget *)
+ method load_sequent: Cic.metasenv -> Cic.conjecture -> unit
+ end
+
+class type proof_viewer =
+ object
+ inherit GMathViewAux.single_selection_math_view
+
+ (** @return the annotated cic term and the ids_to_inner_types and
+ * ids_to_inner_sorts maps *)
+ method load_proof: Gdome.document -> hist_metadata -> unit
+
+ end
+