+type abouts =
+ [ `Blank
+ | `Current_proof
+ | `Us
+ ]
+
+type mathViewer_entry =
+ [ `About of abouts (* current proof *)
+ | `Check of string (* term *)
+ | `Cic of Cic.term * Cic.metasenv
+ | `Dir of string (* "directory" in cic uris namespace *)
+ | `Uri of UriManager.uri (* cic object uri *)
+ | `Whelp of string * UriManager.uri list (* query and results *)
+ ]
+
+let string_of_entry = function
+ | `About `Blank -> "about:blank"
+ | `About `Current_proof -> "about:proof"
+ | `About `Us -> "about:us"
+ | `Check _ -> "check:"
+ | `Cic (_, _) -> "term:"
+ | `Dir uri -> uri
+ | `Uri uri -> UriManager.string_of_uri uri
+ | `Whelp (query, _) -> query
+
+let entry_of_string = function
+ | "about:blank" -> `About `Blank
+ | "about:proof" -> `About `Current_proof
+ | "about:us" -> `About `Us
+ | _ -> (* only about entries supported ATM *)
+ raise (Invalid_argument "entry_of_string")
+
+class type mathViewer =
+ object
+ (** @param reuse if set reused last opened cic browser otherwise
+ * opens a new one. default is false
+ *)
+ method show_entry: ?reuse:bool -> mathViewer_entry -> unit
+ method show_uri_list:
+ ?reuse:bool -> entry:mathViewer_entry -> UriManager.uri list -> unit
+ end
+
+let qualify status name = get_string_option status "baseuri" ^ "/" ^ name
+
+let get_current_proof status =
+ match status.proof_status with
+ | Incomplete_proof { proof = p } -> p
+ | _ -> statement_error "no ongoing proof"
+
+let get_proof_metasenv status =
+ match status.proof_status with
+ | No_proof -> []
+ | Proof (_, metasenv, _, _)
+ | Incomplete_proof { proof = (_, metasenv, _, _) }
+ | Intermediate metasenv ->
+ metasenv
+
+let get_proof_context status goal =
+ match status.proof_status with
+ | Incomplete_proof { proof = (_, metasenv, _, _) } ->
+ let (_, context, _) = CicUtil.lookup_meta goal metasenv in
+ context
+ | _ -> []
+
+let get_proof_conclusion status goal =
+ match status.proof_status with
+ | Incomplete_proof { proof = (_, metasenv, _, _) } ->
+ let (_, _, conclusion) = CicUtil.lookup_meta goal metasenv in
+ conclusion
+ | _ -> statement_error "no ongoing proof"
+
+let get_stack status =
+ match status.proof_status with
+ | Incomplete_proof p -> p.stack
+ | Proof _ -> Continuationals.Stack.empty
+ | _ -> assert false
+
+let set_stack stack status =
+ match status.proof_status with
+ | Incomplete_proof p ->
+ { status with proof_status = Incomplete_proof { p with stack = stack } }
+ | Proof _ ->
+ assert (Continuationals.Stack.is_empty stack);
+ status
+ | _ -> assert false
+