+exception NoObjectsLocated;;
+
+let user_uri_choice uris =
+ let uri =
+ match uris with
+ [] -> raise NoObjectsLocated
+ | [uri] -> uri
+ | uris ->
+ let choice =
+ GToolbox.question_box ~title:"Ambiguous result."
+ ~buttons:uris ~default:1
+ "Ambiguous result. Please, choose one."
+ in
+ List.nth uris (choice-1)
+ in
+ String.sub uri 4 (String.length uri - 4)
+;;
+
+(* CSC: IMPERATIVE AND NOT VERY CLEAN, TO GET THE LAST ISSUED QUERY *)
+let get_last_query =
+ let query = ref "" in
+ MQueryGenerator.set_confirm_query
+ (function q -> query := MQueryUtil.text_of_query q ; true) ;
+ function result -> !query ^ " <h1>Result:</h1> " ^ MQueryUtil.text_of_result result "<br>"
+;;
+
+let locate rendering_window () =
+ let inputt = (rendering_window#inputt : GEdit.text) in
+ let outputhtml = (rendering_window#outputhtml : GHtml.xmhtml) in
+ let inputlen = inputt#length in
+ let input = inputt#get_chars 0 inputlen in
+ try
+ match Str.split (Str.regexp "[ \t]+") input with
+ [] -> ()
+ | head :: tail ->
+ inputt#delete_text 0 inputlen ;
+ let result = MQueryGenerator.locate head in
+ let uris =
+ List.map
+ (function uri,_ -> wrong_xpointer_format_from_wrong_xpointer_format' uri)
+ result in
+ let html = (" <h1>Locate Query: </h1><pre>" ^ get_last_query result ^ "</pre>") in
+ output_html outputhtml html ;
+ let uri' = user_uri_choice uris in
+ ignore ((inputt#insert_text uri') ~pos:0)
+ with
+ e ->
+ output_html outputhtml
+ ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>")
+;;
+
+let backward rendering_window () =
+ let outputhtml = (rendering_window#outputhtml : GHtml.xmhtml) in
+ let inputt = (rendering_window#inputt : GEdit.text) in
+ let inputlen = inputt#length in
+ let input = inputt#get_chars 0 inputlen in
+ let level = int_of_string input in
+ let metasenv =
+ match !ProofEngine.proof with
+ None -> assert false
+ | Some (_,metasenv,_,_) -> metasenv
+ in
+ try
+ match !ProofEngine.goal with
+ None -> ()
+ | Some metano ->
+ let (_, ey ,ty) = List.find (function (m,_,_) -> m=metano) metasenv in
+ let result = MQueryGenerator.backward metasenv ey ty level in
+ let uris =
+ List.map
+ (function uri,_ -> wrong_xpointer_format_from_wrong_xpointer_format' uri)
+ result in
+ let html =
+ " <h1>Backward Query: </h1>" ^
+ " <h2>Levels: </h2> " ^
+ MQueryGenerator.string_of_levels (MQueryGenerator.levels_of_term metasenv ey ty) "<br>" ^
+ " <pre>" ^ get_last_query result ^ "</pre>" in
+ output_html outputhtml html ;
+ let uri' = user_uri_choice uris in
+ inputt#delete_text 0 inputlen ;
+ ignore ((inputt#insert_text uri') ~pos:0)
+ with
+ e ->
+ output_html outputhtml
+ ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>")
+;;
+