+ method reset: unit (** return the interpreter to the initial state *)
+
+ (** parse a single phrase contained in the input string. Additional
+ * garbage at the end of the phrase is ignored
+ * @return true if no exception has been raised by the evaluation, false
+ * otherwise
+ *)
+ method evalPhrase: string -> bool
+
+ (** as above, evaluating a command/tactics AST *)
+ method evalAst: DisambiguateTypes.tactical -> bool
+
+ (** offset from the starting of the last string parser by evalPhrase where
+ * parsing stop.
+ * @raise Failure when no offset has been recorded *)
+ method endOffset: int
+
+ end
+
+(** {2 MathML widgets} *)
+
+type mml_of_cic_sequent =
+ Cic.metasenv -> Cic.conjecture ->
+ 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
+
+class type proof_viewer =
+ object
+ inherit GMathViewAux.single_selection_math_view
+
+ method load_proof: StatefulProofEngine.proof_status -> unit
+ end
+
+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 -> int -> unit
+ end
+
+class type sequents_viewer =
+ object
+ method reset: unit
+ method load_sequents: Cic.metasenv -> unit
+ method goto_sequent: int -> unit (* to be called _after_ load_sequents *)