X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2FgTopLevel%2FgTopLevel.ml;h=a1254be54f4a4c4677273f1fe9e8f0d383e1713b;hb=c28e63f31a446c994c69cb00c060e39ed48d8066;hp=7c01b4d75879b95771bbeea27b51278cdf0ad07d;hpb=2329c7fd13fb6c88f9f82ccad6b25a67c9ce7acf;p=helm.git

diff --git a/helm/gTopLevel/gTopLevel.ml b/helm/gTopLevel/gTopLevel.ml
index 7c01b4d75..a1254be54 100644
--- a/helm/gTopLevel/gTopLevel.ml
+++ b/helm/gTopLevel/gTopLevel.ml
@@ -1,4 +1,4 @@
-(* Copyright (C) 2000, HELM Team.
+(* Copyright (C) 2000-2002, HELM Team.
  * 
  * This file is part of HELM, an Hypertextual, Electronic
  * Library of Mathematics, developed at the Computer Science
@@ -33,6 +33,18 @@
 (*                                                                            *)
 (******************************************************************************)
 
+
+(* CSC: quick fix: a function from [uri#xpointer(path)] to [uri#path] *)
+let wrong_xpointer_format_from_wrong_xpointer_format' uri =
+ try
+  let index_sharp =  String.index uri '#' in
+  let index_rest = index_sharp + 10 in
+   let baseuri = String.sub uri 0 index_sharp in
+   let rest = String.sub uri index_rest (String.length uri - index_rest - 1) in
+    baseuri ^ "#" ^ rest
+ with Not_found -> uri
+;;
+
 (* GLOBAL CONSTANTS *)
 
 let helmns = Gdome.domString "http://www.cs.unibo.it/helm";;
@@ -47,17 +59,328 @@ let htmlfooter =
  "</html>"
 ;;
 
+(*
+let prooffile = "/home/tassi/miohelm/tmp/currentproof";;
+let prooffile = "/public/sacerdot/currentproof";;
+*)
+
+let prooffile = "/public/sacerdot/currentproof";;
+let prooffiletype = "/public/sacerdot/currentprooftype";;
+
+(*CSC: the getter should handle the innertypes, not the FS *)
+(*
+let innertypesfile = "/home/tassi/miohelm/tmp/innertypes";;
+let innertypesfile = "/public/sacerdot/innertypes";;
+*)
+
+let innertypesfile = "/public/sacerdot/innertypes";;
+let constanttypefile = "/public/sacerdot/constanttype";;
+
+let empty_id_to_uris = ([],function _ -> None);;
+
+
 (* GLOBAL REFERENCES (USED BY CALLBACKS) *)
 
 let htmlheader_and_content = ref htmlheader;;
 
-let filename4uwobo = "/public/sacerdot/prova.xml";;
-
 let current_cic_infos = ref None;;
+let current_goal_infos = ref None;;
+let current_scratch_infos = ref None;;
+
+let id_to_uris = ref empty_id_to_uris;;
+
+let check_term = ref (fun _ _ _ -> assert false);;
+
+exception RenderingWindowsNotInitialized;;
+
+let set_rendering_window,rendering_window =
+ let rendering_window_ref = ref None in
+  (function rw -> rendering_window_ref := Some rw),
+  (function () ->
+    match !rendering_window_ref with
+       None -> raise RenderingWindowsNotInitialized
+     | Some rw -> rw
+  )
+;;
+
+exception SettingsWindowsNotInitialized;;
+
+let set_settings_window,settings_window =
+ let settings_window_ref = ref None in
+  (function rw -> settings_window_ref := Some rw),
+  (function () ->
+    match !settings_window_ref with
+       None -> raise SettingsWindowsNotInitialized
+     | Some rw -> rw
+  )
+;;
+
+(* COMMAND LINE OPTIONS *)
+
+let usedb = ref true
+
+let argspec =
+  [
+    "-nodb", Arg.Clear usedb, "disable use of MathQL DB"
+  ]
+in
+Arg.parse argspec ignore ""
 
 
 (* MISC FUNCTIONS *)
 
+let cic_textual_parser_uri_of_string uri' =
+ (* Constant *)
+ if String.sub uri' (String.length uri' - 4) 4 = ".con" then
+  CicTextualParser0.ConUri (UriManager.uri_of_string uri')
+ else
+  if String.sub uri' (String.length uri' - 4) 4 = ".var" then
+   CicTextualParser0.VarUri (UriManager.uri_of_string uri')
+  else
+   (try
+     (* Inductive Type *)
+     let uri'',typeno = CicTextualLexer.indtyuri_of_uri uri' in
+      CicTextualParser0.IndTyUri (uri'',typeno)
+    with
+     _ ->
+      (* Constructor of an Inductive Type *)
+      let uri'',typeno,consno =
+       CicTextualLexer.indconuri_of_uri uri'
+      in
+       CicTextualParser0.IndConUri (uri'',typeno,consno)
+   )
+;;
+
+let term_of_cic_textual_parser_uri uri =
+ let module C = Cic in
+ let module CTP = CicTextualParser0 in
+  match uri with
+     CTP.ConUri uri -> C.Const (uri,[])
+   | CTP.VarUri uri -> C.Var (uri,[])
+   | CTP.IndTyUri (uri,tyno) -> C.MutInd (uri,tyno,[])
+   | CTP.IndConUri (uri,tyno,consno) -> C.MutConstruct (uri,tyno,consno,[])
+;;
+
+let string_of_cic_textual_parser_uri uri =
+ let module C = Cic in
+ let module CTP = CicTextualParser0 in
+  let uri' =
+   match uri with
+      CTP.ConUri uri -> UriManager.string_of_uri uri
+    | CTP.VarUri uri -> UriManager.string_of_uri uri
+    | CTP.IndTyUri (uri,tyno) ->
+       UriManager.string_of_uri uri ^ "#1/" ^ string_of_int (tyno + 1)
+    | CTP.IndConUri (uri,tyno,consno) ->
+       UriManager.string_of_uri uri ^ "#1/" ^ string_of_int (tyno + 1) ^ "/" ^
+        string_of_int consno
+  in
+   (* 4 = String.length "cic:" *)
+   String.sub uri' 4 (String.length uri' - 4)
+;;
+
+(* UTILITY FUNCTIONS TO DISAMBIGUATE AN URI *)
+
+exception NoChoice;;
+
+let interactive_user_uri_choice ?(cancel="Cancel") ~title ~msg uris =
+ let choice = ref None in
+ let window = GWindow.dialog ~modal:true ~title () in
+ let lMessage =
+  GMisc.label ~text:msg ~packing:window#vbox#add () in
+ let vbox = GPack.vbox ~border_width:10
+  ~packing:(window#action_area#pack ~expand:true ~padding:4) () in
+ let hbox1 = GPack.hbox ~border_width:10 ~packing:vbox#add () in
+ let combo =
+  GEdit.combo ~popdown_strings:uris ~packing:hbox1#add () in
+ let checkb =
+  GButton.button ~label:"Check"
+   ~packing:(hbox1#pack ~expand:false ~fill:false ~padding:5) () in
+ let hbox = GPack.hbox ~border_width:10 ~packing:vbox#add () in
+ let okb =
+  GButton.button ~label:"Ok"
+   ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let cancelb =
+  GButton.button ~label:cancel
+   ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ (* actions *)
+ let ok_callback () =
+  choice := Some combo#entry#text ;
+  window#destroy ()
+ in
+ let check_callback () =
+   !check_term [] []
+    (term_of_cic_textual_parser_uri
+     (cic_textual_parser_uri_of_string combo#entry#text))
+ in
+  ignore (window#connect#destroy GMain.Main.quit) ;
+  ignore (cancelb#connect#clicked window#destroy) ;
+  ignore (okb#connect#clicked ok_callback) ;
+  ignore (checkb#connect#clicked check_callback) ;
+  window#set_position `CENTER ;
+  window#show () ;
+  GMain.Main.main () ;
+  match !choice with
+     None -> raise NoChoice
+   | Some uri -> uri
+;;
+
+(* MISC FUNCTIONS *)
+
+(* 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 register_alias (id,uri) =
+ let dom,resolve_id = !id_to_uris in
+  id_to_uris :=
+   (if List.mem id dom then dom else id::dom),
+    function id' -> if id' = id then Some uri else resolve_id id'
+;;  
+
+let output_html outputhtml msg =
+ htmlheader_and_content := !htmlheader_and_content ^ msg ;
+ outputhtml#source (!htmlheader_and_content ^ htmlfooter) ;
+ outputhtml#set_topline (-1)
+;;
+
+let locate_one_id id =
+ let result = MQueryGenerator.locate id 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 (rendering_window ())#outputhtml html ;
+  let uris' =
+   match uris with
+      [] ->
+       (match
+         (GToolbox.input_string ~title:"Unknown input"
+          ("No URI matching \"" ^ id ^ "\" found. Please enter its URI"))
+        with
+           None -> raise NoChoice
+         | Some uri -> ["cic:" ^ uri]
+       )
+    | [uri] -> [uri]
+    | _ ->
+      try
+       [interactive_user_uri_choice
+         ~cancel:"Try every possibility."
+         ~title:"Ambiguous input."
+         ~msg:
+           ("Ambiguous input \"" ^ id ^
+            "\". Please, choose one interpretation:")
+         uris
+       ]
+      with
+       NoChoice -> uris
+  in
+   List.map cic_textual_parser_uri_of_string uris'
+;;
+
+exception ThereDoesNotExistAnyWellTypedInterpretationOfTheInput;;
+exception AmbiguousInput;;
+
+let disambiguate_input context metasenv dom mk_metasenv_and_expr =
+ let known_ids,resolve_id = !id_to_uris in
+ let dom' =
+  let rec filter =
+   function
+      [] -> []
+    | he::tl ->
+       if List.mem he known_ids then filter tl else he::(filter tl)
+  in
+   filter dom
+ in
+  (* for each id in dom' we get the list of uris associated to it *)
+  let list_of_uris = List.map locate_one_id dom' in
+  (* and now we compute the list of all possible assignments from id to uris *)
+  let resolve_ids =
+   let rec aux ids list_of_uris =
+    match ids,list_of_uris with
+       [],[] -> [resolve_id]
+     | id::idtl,uris::uristl ->
+        let resolves = aux idtl uristl in
+         List.concat
+          (List.map
+            (function uri ->
+              List.map
+               (function f ->
+                 function id' -> if id = id' then Some uri else f id'
+               ) resolves
+            ) uris
+          )
+     | _,_ -> assert false
+   in
+    aux dom' list_of_uris
+  in
+prerr_endline ("##### NE DISAMBIGUO: " ^ string_of_int (List.length resolve_ids)) ;
+   (* now we select only the ones that generates well-typed terms *)
+   let resolve_ids' =
+    let rec filter =
+     function
+        [] -> []
+      | resolve::tl ->
+         let metasenv',expr = mk_metasenv_and_expr resolve in
+          try
+(*CSC: Bug here: we do not try to typecheck also the metasenv' *)
+           ignore
+            (CicTypeChecker.type_of_aux' metasenv context expr) ;
+           resolve::(filter tl)
+          with
+           _ -> filter tl
+    in
+     filter resolve_ids
+   in
+    let resolve_id' =
+     match resolve_ids' with
+        [] -> raise ThereDoesNotExistAnyWellTypedInterpretationOfTheInput
+      | [resolve_id] -> resolve_id
+      | _ ->
+        let choices =
+         List.map
+          (function resolve ->
+            String.concat " ; "
+             (List.map
+              (function id ->
+                id ^ " := " ^
+                 match resolve id with
+                    None -> assert false
+                  | Some uri ->
+                     match uri with
+                        CicTextualParser0.ConUri uri
+                      | CicTextualParser0.VarUri uri ->
+                         UriManager.string_of_uri uri
+                      | CicTextualParser0.IndTyUri (uri,tyno) ->
+                         UriManager.string_of_uri uri ^ "#xpointer(1/" ^
+                          string_of_int (tyno+1) ^ ")"
+                      | CicTextualParser0.IndConUri (uri,tyno,consno) ->
+                         UriManager.string_of_uri uri ^ "#xpointer(1/" ^
+                          string_of_int (tyno+1) ^ "/" ^ string_of_int consno ^                           ")"
+              ) dom
+             )
+          ) resolve_ids'
+        in
+        let choice =
+         GToolbox.question_box ~title:"Ambiguous input."
+          ~buttons:choices
+          ~default:1 "Ambiguous input. Please, choose one interpretation."
+        in
+         if choice > 0 then
+          List.nth resolve_ids' (choice - 1)
+         else
+          (* No choice from the user *)
+          raise NoChoice
+    in
+     id_to_uris := known_ids @ dom', resolve_id' ;
+     mk_metasenv_and_expr resolve_id'
+;;
+
 let domImpl = Gdome.domImplementation ();;
 
 let parseStyle name =
@@ -80,12 +403,9 @@ let c1 = parseStyle "rootcontent.xsl";;
 let g  = parseStyle "genmmlid.xsl";;
 let c2 = parseStyle "annotatedpres.xsl";;
 
-(*
-let processorURL = "http://phd.cs.unibo.it:8080/helm/servelt/uwobo/";;
-let getterURL = "http://phd.cs.unibo.it:8081/";;
-*)
-let processorURL = "http://localhost:8080/helm/servelt/uwobo/";;
-let getterURL = "http://localhost:8081/";;
+
+let getterURL = Configuration.getter_url;;
+let processorURL = Configuration.processor_url;;
 
 let mml_styles = [d_c ; c1 ; g ; c2 ; l];;
 let mml_args =
@@ -99,8 +419,9 @@ let mml_args =
   "media-type", "'text/html'" ;
   "keys", "'d_c%2CC1%2CG%2CC2%2CL'" ;
   "interfaceURL", "'http%3A//phd.cs.unibo.it/helm/html/cic/index.html'" ;
-  "naturalLanguage", "'no'" ;
+  "naturalLanguage", "'yes'" ;
   "annotations", "'no'" ;
+  "explodeall", "'true()'" ;
   "topurl", "'http://phd.cs.unibo.it/helm'" ;
   "CICURI", "'cic:/Coq/Init/Datatypes/bool_ind.con'" ]
 ;;
@@ -119,6 +440,7 @@ let sequent_args =
   "interfaceURL", "'http%3A//phd.cs.unibo.it/helm/html/cic/index.html'" ;
   "naturalLanguage", "'no'" ;
   "annotations", "'no'" ;
+  "explodeall", "'true()'" ;
   "topurl", "'http://phd.cs.unibo.it/helm'" ;
   "CICURI", "'cic:/Coq/Init/Datatypes/bool_ind.con'" ]
 ;;
@@ -140,108 +462,857 @@ let applyStylesheets input styles args =
   input styles
 ;;
 
-let mml_of_cic acic =
-prerr_endline "BBB CREAZIONE" ;
- let xml =
-  Cic2Xml.print_term (UriManager.uri_of_string "cic:/dummy.con") acic
+let mml_of_cic_object uri annobj ids_to_inner_sorts ids_to_inner_types =
+(*CSC: ????????????????? *)
+ let xml, bodyxml =
+  Cic2Xml.print_object uri ~ids_to_inner_sorts annobj 
  in
-  Xml.pp ~quiet:true xml (Some filename4uwobo) ;
-prerr_endline "BBB PARSING" ;
-  let input = domImpl#createDocumentFromURI ~uri:filename4uwobo () in
-prerr_endline "BBB STYLESHEETS" ;
+ let xmlinnertypes =
+  Cic2Xml.print_inner_types uri ~ids_to_inner_sorts
+   ~ids_to_inner_types
+ in
+  let input =
+   match bodyxml with
+      None -> Xml2Gdome.document_of_xml domImpl xml
+    | Some bodyxml' ->
+       Xml.pp xml (Some constanttypefile) ;
+       Xml2Gdome.document_of_xml domImpl bodyxml'
+  in
+(*CSC: We save the innertypes to disk so that we can retrieve them in the  *)
+(*CSC: stylesheet. This DOES NOT work when UWOBO and/or the getter are not *)
+(*CSC: local.                                                              *)
+   Xml.pp xmlinnertypes (Some innertypesfile) ;
    let output = applyStylesheets input mml_styles mml_args in
-prerr_endline "BBB RESA" ;
-ignore(domImpl#saveDocumentToFile ~doc:output ~name:"/tmp/xxxyyyzzz" ()) ;
-        output
+    output
 ;;
 
 
 (* CALLBACKS *)
 
-let exact rendering_window () =
- let inputt = (rendering_window#inputt : GEdit.text) in
+exception RefreshSequentException of exn;;
+exception RefreshProofException of exn;;
+
+let refresh_proof (output : GMathView.math_view) =
+ try
+  let uri,currentproof =
+   match !ProofEngine.proof with
+      None -> assert false
+    | Some (uri,metasenv,bo,ty) ->
+       (*CSC: Wrong: [] is just plainly wrong *)
+       uri,(Cic.CurrentProof (UriManager.name_of_uri uri, metasenv, bo, ty, []))
+  in
+   let
+    (acic,ids_to_terms,ids_to_father_ids,ids_to_inner_sorts,
+     ids_to_inner_types,ids_to_conjectures,ids_to_hypotheses)
+   =
+    Cic2acic.acic_object_of_cic_object currentproof
+   in
+    let mml =
+     mml_of_cic_object uri acic ids_to_inner_sorts ids_to_inner_types
+    in
+     output#load_tree mml ;
+     current_cic_infos :=
+      Some (ids_to_terms,ids_to_father_ids,ids_to_conjectures,ids_to_hypotheses)
+ with
+  e ->
+ match !ProofEngine.proof with
+    None -> assert false
+  | Some (uri,metasenv,bo,ty) ->
+prerr_endline ("Offending proof: " ^ CicPp.ppobj (Cic.CurrentProof ("questa",metasenv,bo,ty,[]))) ; flush stderr ;
+   raise (RefreshProofException e)
+;;
+
+let refresh_sequent ?(empty_notebook=true) notebook =
+ try
+  match !ProofEngine.goal with
+     None ->
+      if empty_notebook then
+       begin 
+        notebook#remove_all_pages ;
+        notebook#set_empty_page
+       end
+      else
+       notebook#proofw#unload
+   | Some metano ->
+      let metasenv =
+       match !ProofEngine.proof with
+          None -> assert false
+        | Some (_,metasenv,_,_) -> metasenv
+      in
+      let currentsequent = List.find (function (m,_,_) -> m=metano) metasenv in
+       let sequent_gdome,ids_to_terms,ids_to_father_ids,ids_to_hypotheses =
+        SequentPp.XmlPp.print_sequent metasenv currentsequent
+       in
+        let sequent_doc =
+         Xml2Gdome.document_of_xml domImpl sequent_gdome
+        in
+         let sequent_mml =
+          applyStylesheets sequent_doc sequent_styles sequent_args
+         in
+          if empty_notebook then
+           begin
+            notebook#remove_all_pages ;
+            List.iter (function (m,_,_) -> notebook#add_page m) metasenv ;
+           end ;
+          notebook#set_current_page metano ;
+          notebook#proofw#load_tree ~dom:sequent_mml ;
+          current_goal_infos :=
+           Some (ids_to_terms,ids_to_father_ids,ids_to_hypotheses)
+ with
+  e ->
+let metano =
+  match !ProofEngine.goal with
+     None -> assert false
+   | Some m -> m
+in
+let metasenv =
+ match !ProofEngine.proof with
+    None -> assert false
+  | Some (_,metasenv,_,_) -> metasenv
+in
+let currentsequent = List.find (function (m,_,_) -> m=metano) metasenv in
+prerr_endline ("Offending sequent: " ^ SequentPp.TextualPp.print_sequent currentsequent) ; flush stderr ;
+   raise (RefreshSequentException e)
+;;
+
+(*
+ignore(domImpl#saveDocumentToFile ~doc:sequent_doc
+ ~name:"/home/galata/miohelm/guruguru1" ~indent:true ()) ;
+*)
+
+let mml_of_cic_term metano term =
+ let metasenv =
+  match !ProofEngine.proof with
+     None -> []
+   | Some (_,metasenv,_,_) -> metasenv
+ in
+ let context =
+  match !ProofEngine.goal with
+     None -> []
+   | Some metano ->
+      let (_,canonical_context,_) =
+       List.find (function (m,_,_) -> m=metano) metasenv
+      in
+       canonical_context
+ in
+   let sequent_gdome,ids_to_terms,ids_to_father_ids,ids_to_hypotheses =
+    SequentPp.XmlPp.print_sequent metasenv (metano,context,term)
+   in
+    let sequent_doc =
+     Xml2Gdome.document_of_xml domImpl sequent_gdome
+    in
+     let res =
+      applyStylesheets sequent_doc sequent_styles sequent_args ;
+     in
+      current_scratch_infos :=
+       Some (term,ids_to_terms,ids_to_father_ids,ids_to_hypotheses) ;
+      res
+;;
+
+(***********************)
+(*       TACTICS       *)
+(***********************)
+
+let call_tactic tactic () =
+ let notebook = (rendering_window ())#notebook in
+ let output = ((rendering_window ())#output : GMathView.math_view) in
+ let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+ let savedproof = !ProofEngine.proof in
+ let savedgoal  = !ProofEngine.goal in
+  begin
+   try
+    tactic () ;
+    refresh_sequent notebook ;
+    refresh_proof output
+   with
+      RefreshSequentException e ->
+       output_html outputhtml
+        ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+         "sequent: " ^ Printexc.to_string e ^ "</h1>") ;
+       ProofEngine.proof := savedproof ;
+       ProofEngine.goal := savedgoal ;
+       refresh_sequent notebook
+    | RefreshProofException e ->
+       output_html outputhtml
+        ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+         "proof: " ^ Printexc.to_string e ^ "</h1>") ;
+       ProofEngine.proof := savedproof ;
+       ProofEngine.goal := savedgoal ;
+       refresh_sequent notebook ;
+       refresh_proof output
+    | e ->
+       output_html outputhtml
+        ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
+       ProofEngine.proof := savedproof ;
+       ProofEngine.goal := savedgoal ;
+  end
+;;
+
+let call_tactic_with_input tactic () =
+ let notebook = (rendering_window ())#notebook in
+ let output = ((rendering_window ())#output : GMathView.math_view) in
+ let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+ let inputt = ((rendering_window ())#inputt : GEdit.text) in
+ let savedproof = !ProofEngine.proof in
+ let savedgoal  = !ProofEngine.goal in
 (*CSC: Gran cut&paste da sotto... *)
   let inputlen = inputt#length in
   let input = inputt#get_chars 0 inputlen ^ "\n" in
    let lexbuf = Lexing.from_string input in
+   let curi =
+    match !ProofEngine.proof with
+       None -> assert false
+     | Some (curi,_,_,_) -> curi
+   in
+   let uri,metasenv,bo,ty =
+    match !ProofEngine.proof with
+       None -> assert false
+     | Some (uri,metasenv,bo,ty) -> uri,metasenv,bo,ty
+   in
+   let canonical_context =
+    match !ProofEngine.goal with
+       None -> assert false
+     | Some metano ->
+        let (_,canonical_context,_) =
+         List.find (function (m,_,_) -> m=metano) metasenv
+        in
+         canonical_context
+   in
+   let context =
+    List.map
+     (function
+         Some (n,_) -> Some n
+       | None -> None
+     ) canonical_context
+   in
     try
      while true do
-      (* Execute the actions *)
-      match CicTextualParser.main CicTextualLexer.token lexbuf with
+      match
+       CicTextualParserContext.main context metasenv CicTextualLexer.token
+        lexbuf register_alias
+      with
          None -> ()
-       | Some expr ->
-          try
-(*??? Ma servira' da qualche parte!
-           let ty  = CicTypeChecker.type_of_aux' [] expr in
-*)
-            let (acic, ids_to_terms, ids_to_father_ids) =
-             Cic2acic.acic_of_cic expr
-            in
-(*CSC: chiamare la vera tattica exact qui! *)
-             ()
-          with
-           e ->
-            print_endline ("? " ^ CicPp.ppterm expr) ;
-            raise e
+       | Some (dom,mk_metasenv_and_expr) ->
+          let (metasenv',expr) =
+           disambiguate_input canonical_context metasenv dom
+            mk_metasenv_and_expr
+          in
+           ProofEngine.proof := Some (uri,metasenv',bo,ty) ;
+           tactic expr ;
+           refresh_sequent notebook ;
+           refresh_proof output
      done
     with
        CicTextualParser0.Eof ->
         inputt#delete_text 0 inputlen
-(*CSC: fare qualcosa di utile *)
+     | RefreshSequentException e ->
+        output_html outputhtml
+         ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+          "sequent: " ^ Printexc.to_string e ^ "</h1>") ;
+        ProofEngine.proof := savedproof ;
+        ProofEngine.goal := savedgoal ;
+        refresh_sequent notebook
+     | RefreshProofException e ->
+        output_html outputhtml
+         ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+          "proof: " ^ Printexc.to_string e ^ "</h1>") ;
+        ProofEngine.proof := savedproof ;
+        ProofEngine.goal := savedgoal ;
+        refresh_sequent notebook ;
+        refresh_proof output
      | e ->
-        print_endline ("Error: " ^ Printexc.to_string e) ; flush stdout
+        output_html outputhtml
+         ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
+        ProofEngine.proof := savedproof ;
+        ProofEngine.goal := savedgoal ;
 ;;
 
-let proveit rendering_window () =
+let call_tactic_with_goal_input tactic () =
+ let module L = LogicalOperations in
  let module G = Gdome in
- match rendering_window#output#get_selection with
-   Some node ->
-    let xpath =
-     ((node : Gdome.element)#getAttributeNS
-     (*CSC: OCAML DIVERGE
-     ((element : G.element)#getAttributeNS
-     *)
-       ~namespaceURI:helmns
-       ~localName:(G.domString "xref"))#to_string
-    in
-     if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
-     else
+  let notebook = (rendering_window ())#notebook in
+  let output = ((rendering_window ())#output : GMathView.math_view) in
+  let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+  let savedproof = !ProofEngine.proof in
+  let savedgoal  = !ProofEngine.goal in
+   match notebook#proofw#get_selection with
+     Some node ->
+      let xpath =
+       ((node : Gdome.element)#getAttributeNS
+         ~namespaceURI:helmns
+         ~localName:(G.domString "xref"))#to_string
+      in
+       if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
+       else
+        begin
+         try
+          match !current_goal_infos with
+             Some (ids_to_terms, ids_to_father_ids,_) ->
+              let id = xpath in
+               tactic (Hashtbl.find ids_to_terms id) ;
+               refresh_sequent notebook ;
+               refresh_proof output
+           | None -> assert false (* "ERROR: No current term!!!" *)
+         with
+            RefreshSequentException e ->
+             output_html outputhtml
+              ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+               "sequent: " ^ Printexc.to_string e ^ "</h1>") ;
+             ProofEngine.proof := savedproof ;
+             ProofEngine.goal := savedgoal ;
+             refresh_sequent notebook
+          | RefreshProofException e ->
+             output_html outputhtml
+              ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+               "proof: " ^ Printexc.to_string e ^ "</h1>") ;
+             ProofEngine.proof := savedproof ;
+             ProofEngine.goal := savedgoal ;
+             refresh_sequent notebook ;
+             refresh_proof output
+          | e ->
+             output_html outputhtml
+              ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
+             ProofEngine.proof := savedproof ;
+             ProofEngine.goal := savedgoal ;
+        end
+   | None ->
+      output_html outputhtml
+       ("<h1 color=\"red\">No term selected</h1>")
+;;
+
+let call_tactic_with_input_and_goal_input tactic () =
+ let module L = LogicalOperations in
+ let module G = Gdome in
+  let notebook = (rendering_window ())#notebook in
+  let output = ((rendering_window ())#output : GMathView.math_view) in
+  let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+  let inputt = ((rendering_window ())#inputt : GEdit.text) in
+  let savedproof = !ProofEngine.proof in
+  let savedgoal  = !ProofEngine.goal in
+   match notebook#proofw#get_selection with
+     Some node ->
+      let xpath =
+       ((node : Gdome.element)#getAttributeNS
+         ~namespaceURI:helmns
+         ~localName:(G.domString "xref"))#to_string
+      in
+       if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
+       else
+        begin
+         try
+          match !current_goal_infos with
+             Some (ids_to_terms, ids_to_father_ids,_) ->
+              let id = xpath in
+               (* Let's parse the input *)
+               let inputlen = inputt#length in
+               let input = inputt#get_chars 0 inputlen ^ "\n" in
+                let lexbuf = Lexing.from_string input in
+                let curi =
+                 match !ProofEngine.proof with
+                    None -> assert false
+                  | Some (curi,_,_,_) -> curi
+                in
+                let uri,metasenv,bo,ty =
+                 match !ProofEngine.proof with
+                    None -> assert false
+                  | Some (uri,metasenv,bo,ty) -> uri,metasenv,bo,ty
+                in
+                let canonical_context =
+                 match !ProofEngine.goal with
+                    None -> assert false
+                  | Some metano ->
+                     let (_,canonical_context,_) =
+                      List.find (function (m,_,_) -> m=metano) metasenv
+                     in
+                      canonical_context in
+                let context =
+                 List.map
+                  (function
+                      Some (n,_) -> Some n
+                    | None -> None
+                  ) canonical_context
+                in
+                 begin
+                  try
+                   while true do
+                    match
+                     CicTextualParserContext.main context metasenv
+                      CicTextualLexer.token lexbuf register_alias
+                    with
+                       None -> ()
+                     | Some (dom,mk_metasenv_and_expr) ->
+                        let (metasenv',expr) =
+                         disambiguate_input canonical_context metasenv dom
+                          mk_metasenv_and_expr
+                        in
+                         ProofEngine.proof := Some (uri,metasenv',bo,ty) ;
+                         tactic ~goal_input:(Hashtbl.find ids_to_terms id)
+                          ~input:expr ;
+                         refresh_sequent notebook ;
+                         refresh_proof output
+                   done
+                  with
+                     CicTextualParser0.Eof ->
+                      inputt#delete_text 0 inputlen
+                 end
+           | None -> assert false (* "ERROR: No current term!!!" *)
+         with
+            RefreshSequentException e ->
+             output_html outputhtml
+              ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+               "sequent: " ^ Printexc.to_string e ^ "</h1>") ;
+             ProofEngine.proof := savedproof ;
+             ProofEngine.goal := savedgoal ;
+             refresh_sequent notebook
+          | RefreshProofException e ->
+             output_html outputhtml
+              ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+               "proof: " ^ Printexc.to_string e ^ "</h1>") ;
+             ProofEngine.proof := savedproof ;
+             ProofEngine.goal := savedgoal ;
+             refresh_sequent notebook ;
+             refresh_proof output
+          | e ->
+             output_html outputhtml
+              ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
+             ProofEngine.proof := savedproof ;
+             ProofEngine.goal := savedgoal ;
+        end
+   | None ->
+      output_html outputhtml
+       ("<h1 color=\"red\">No term selected</h1>")
+;;
+
+let call_tactic_with_goal_input_in_scratch tactic scratch_window () =
+ let module L = LogicalOperations in
+ let module G = Gdome in
+  let mmlwidget = (scratch_window#mmlwidget : GMathView.math_view) in
+  let outputhtml = (scratch_window#outputhtml : GHtml.xmhtml) in
+  let savedproof = !ProofEngine.proof in
+  let savedgoal  = !ProofEngine.goal in
+   match mmlwidget#get_selection with
+     Some node ->
+      let xpath =
+       ((node : Gdome.element)#getAttributeNS
+         ~namespaceURI:helmns
+         ~localName:(G.domString "xref"))#to_string
+      in
+       if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
+       else
+        begin
+         try
+          match !current_scratch_infos with
+             (* term is the whole goal in the scratch_area *)
+             Some (term,ids_to_terms, ids_to_father_ids,_) ->
+              let id = xpath in
+               let expr = tactic term (Hashtbl.find ids_to_terms id) in
+                let mml = mml_of_cic_term 111 expr in
+                 scratch_window#show () ;
+                 scratch_window#mmlwidget#load_tree ~dom:mml
+           | None -> assert false (* "ERROR: No current term!!!" *)
+         with
+          e ->
+           output_html outputhtml
+            ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>")
+        end
+   | None ->
+      output_html outputhtml
+       ("<h1 color=\"red\">No term selected</h1>")
+;;
+
+let call_tactic_with_hypothesis_input tactic () =
+ let module L = LogicalOperations in
+ let module G = Gdome in
+  let notebook = (rendering_window ())#notebook in
+  let output = ((rendering_window ())#output : GMathView.math_view) in
+  let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+  let savedproof = !ProofEngine.proof in
+  let savedgoal  = !ProofEngine.goal in
+   match notebook#proofw#get_selection with
+     Some node ->
+      let xpath =
+       ((node : Gdome.element)#getAttributeNS
+         ~namespaceURI:helmns
+         ~localName:(G.domString "xref"))#to_string
+      in
+       if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
+       else
+        begin
+         try
+          match !current_goal_infos with
+             Some (_,_,ids_to_hypotheses) ->
+              let id = xpath in
+               tactic (Hashtbl.find ids_to_hypotheses id) ;
+               refresh_sequent notebook ;
+               refresh_proof output
+           | None -> assert false (* "ERROR: No current term!!!" *)
+         with
+            RefreshSequentException e ->
+             output_html outputhtml
+              ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+               "sequent: " ^ Printexc.to_string e ^ "</h1>") ;
+             ProofEngine.proof := savedproof ;
+             ProofEngine.goal := savedgoal ;
+             refresh_sequent notebook
+          | RefreshProofException e ->
+             output_html outputhtml
+              ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+               "proof: " ^ Printexc.to_string e ^ "</h1>") ;
+             ProofEngine.proof := savedproof ;
+             ProofEngine.goal := savedgoal ;
+             refresh_sequent notebook ;
+             refresh_proof output
+          | e ->
+             output_html outputhtml
+              ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
+             ProofEngine.proof := savedproof ;
+             ProofEngine.goal := savedgoal ;
+        end
+   | None ->
+      output_html outputhtml
+       ("<h1 color=\"red\">No term selected</h1>")
+;;
+
+
+let intros = call_tactic ProofEngine.intros;;
+let exact = call_tactic_with_input ProofEngine.exact;;
+let apply = call_tactic_with_input ProofEngine.apply;;
+let elimsimplintros = call_tactic_with_input ProofEngine.elim_simpl_intros;;
+let elimtype = call_tactic_with_input ProofEngine.elim_type;;
+let whd = call_tactic_with_goal_input ProofEngine.whd;;
+let reduce = call_tactic_with_goal_input ProofEngine.reduce;;
+let simpl = call_tactic_with_goal_input ProofEngine.simpl;;
+let fold = call_tactic_with_input ProofEngine.fold;;
+let cut = call_tactic_with_input ProofEngine.cut;;
+let change = call_tactic_with_input_and_goal_input ProofEngine.change;;
+let letin = call_tactic_with_input ProofEngine.letin;;
+let ring = call_tactic ProofEngine.ring;;
+let clearbody = call_tactic_with_hypothesis_input ProofEngine.clearbody;;
+let clear = call_tactic_with_hypothesis_input ProofEngine.clear;;
+let fourier = call_tactic ProofEngine.fourier;;
+let rewritesimpl = call_tactic_with_input ProofEngine.rewrite_simpl;;
+let reflexivity = call_tactic ProofEngine.reflexivity;;
+let symmetry = call_tactic ProofEngine.symmetry;;
+let transitivity = call_tactic_with_input ProofEngine.transitivity;;
+let left = call_tactic ProofEngine.left;;
+let right = call_tactic ProofEngine.right;;
+let assumption = call_tactic ProofEngine.assumption;;
+
+let whd_in_scratch scratch_window =
+ call_tactic_with_goal_input_in_scratch ProofEngine.whd_in_scratch
+  scratch_window
+;;
+let reduce_in_scratch scratch_window =
+ call_tactic_with_goal_input_in_scratch ProofEngine.reduce_in_scratch
+  scratch_window
+;;
+let simpl_in_scratch scratch_window =
+ call_tactic_with_goal_input_in_scratch ProofEngine.simpl_in_scratch
+  scratch_window
+;;
+
+
+
+(**********************)
+(*   END OF TACTICS   *)
+(**********************)
+
+exception OpenConjecturesStillThere;;
+exception WrongProof;;
+
+let qed () =
+ match !ProofEngine.proof with
+    None -> assert false
+  | Some (uri,[],bo,ty) ->
+     if
+      CicReduction.are_convertible []
+       (CicTypeChecker.type_of_aux' [] [] bo) ty
+     then
       begin
-       match !current_cic_infos with
-          Some (ids_to_terms, ids_to_father_ids) ->
-           let id = xpath in
-            let sequent =
-             LogicalOperations.to_sequent id ids_to_terms ids_to_father_ids
-            in
-             SequentPp.TextualPp.print_sequent sequent ;
-             let sequent_gdome = SequentPp.XmlPp.print_sequent sequent in
-              let sequent_doc =
-               Xml2Gdome.document_of_xml domImpl sequent_gdome
-              in
-               let sequent_mml =
-                applyStylesheets sequent_doc sequent_styles sequent_args
-               in
-                rendering_window#proofw#load_tree ~dom:sequent_mml ;
-ignore(domImpl#saveDocumentToFile ~doc:sequent_doc
- ~name:"/public/sacerdot/guruguru1" ~indent:true ()) ;
-ignore(domImpl#saveDocumentToFile ~doc:sequent_mml
- ~name:"/public/sacerdot/guruguru2" ~indent:true ())
-        | None -> assert false (* "ERROR: No current term!!!" *)
+       (*CSC: Wrong: [] is just plainly wrong *)
+       let proof = Cic.Constant (UriManager.name_of_uri uri,Some bo,ty,[]) in
+        let
+         (acic,ids_to_terms,ids_to_father_ids,ids_to_inner_sorts,
+          ids_to_inner_types,ids_to_conjectures,ids_to_hypotheses)
+        =
+         Cic2acic.acic_object_of_cic_object proof
+        in
+         let mml =
+          mml_of_cic_object uri acic ids_to_inner_sorts ids_to_inner_types
+         in
+          ((rendering_window ())#output : GMathView.math_view)#load_tree mml ;
+          current_cic_infos :=
+           Some
+            (ids_to_terms,ids_to_father_ids,ids_to_conjectures,
+             ids_to_hypotheses)
       end
- | None -> assert false (* "ERROR: No selection!!!" *)
+     else
+      raise WrongProof
+  | _ -> raise OpenConjecturesStillThere
 ;;
 
-let output_html outputhtml msg =
- htmlheader_and_content := !htmlheader_and_content ^ msg ;
- outputhtml#source (!htmlheader_and_content ^ htmlfooter)
+(*????
+let dtdname = "http://www.cs.unibo.it/helm/dtd/cic.dtd";;
+let dtdname = "/home/tassi/miohelm/helm/dtd/cic.dtd";;
+*)
+let dtdname = "/projects/helm/V7_mowgli/dtd/cic.dtd";;
+
+let save () =
+ let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+  match !ProofEngine.proof with
+     None -> assert false
+   | Some (uri, metasenv, bo, ty) ->
+      let currentproof =
+       (*CSC: Wrong: [] is just plainly wrong *)
+       Cic.CurrentProof (UriManager.name_of_uri uri,metasenv,bo,ty,[])
+      in
+       let (acurrentproof,_,_,ids_to_inner_sorts,_,_,_) =
+        Cic2acic.acic_object_of_cic_object currentproof
+       in
+        let xml, bodyxml =
+         match Cic2Xml.print_object uri ~ids_to_inner_sorts acurrentproof with
+            xml,Some bodyxml -> xml,bodyxml
+          | _,None -> assert false
+        in
+         Xml.pp ~quiet:true xml (Some prooffiletype) ;
+         output_html outputhtml
+          ("<h1 color=\"Green\">Current proof type saved to " ^
+           prooffiletype ^ "</h1>") ;
+         Xml.pp ~quiet:true bodyxml (Some prooffile) ;
+         output_html outputhtml
+          ("<h1 color=\"Green\">Current proof body saved to " ^
+           prooffile ^ "</h1>")
+;;
+
+(* Used to typecheck the loaded proofs *)
+let typecheck_loaded_proof metasenv bo ty =
+ let module T = CicTypeChecker in
+  ignore (
+   List.fold_left
+    (fun metasenv ((_,context,ty) as conj) ->
+      ignore (T.type_of_aux' metasenv context ty) ;
+      metasenv @ [conj]
+    ) [] metasenv) ;
+  ignore (T.type_of_aux' metasenv [] ty) ;
+  ignore (T.type_of_aux' metasenv [] bo)
+;;
+
+let load () =
+ let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+ let output = ((rendering_window ())#output : GMathView.math_view) in
+ let notebook = (rendering_window ())#notebook in
+  try
+   let uri = UriManager.uri_of_string "cic:/dummy.con" in
+    match CicParser.obj_of_xml prooffiletype (Some prooffile) with
+       Cic.CurrentProof (_,metasenv,bo,ty,_) ->
+        typecheck_loaded_proof metasenv bo ty ;
+        ProofEngine.proof :=
+         Some (uri, metasenv, bo, ty) ;
+        ProofEngine.goal :=
+         (match metasenv with
+             [] -> None
+           | (metano,_,_)::_ -> Some metano
+         ) ;
+        refresh_proof output ;
+        refresh_sequent notebook ;
+         output_html outputhtml
+          ("<h1 color=\"Green\">Current proof type loaded from " ^
+            prooffiletype ^ "</h1>") ;
+         output_html outputhtml
+          ("<h1 color=\"Green\">Current proof body loaded from " ^
+            prooffile ^ "</h1>")
+     | _ -> assert false
+  with
+     RefreshSequentException e ->
+      output_html outputhtml
+       ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+        "sequent: " ^ Printexc.to_string e ^ "</h1>")
+   | RefreshProofException e ->
+      output_html outputhtml
+       ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+        "proof: " ^ Printexc.to_string e ^ "</h1>")
+   | e ->
+      output_html outputhtml
+       ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
+;;
+
+let edit_aliases () =
+ let inputt = ((rendering_window ())#inputt : GEdit.text) in
+ let dom,resolve_id = !id_to_uris in
+  let inputlen = inputt#length in
+   inputt#delete_text 0 inputlen ;
+   let _ =
+    inputt#insert_text ~pos:0
+     (String.concat "\n"
+       (List.map
+         (function v ->
+           let uri =
+            match resolve_id v with
+               None -> assert false
+             | Some uri -> uri
+           in
+            "alias " ^ v ^ " " ^
+              (string_of_cic_textual_parser_uri uri)
+         ) dom))
+   in
+    id_to_uris := empty_id_to_uris
+;;
+
+let proveit () =
+ let module L = LogicalOperations in
+ let module G = Gdome in
+ let notebook = (rendering_window ())#notebook in
+ let output = (rendering_window ())#output in
+ let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+  match (rendering_window ())#output#get_selection with
+    Some node ->
+     let xpath =
+      ((node : Gdome.element)#getAttributeNS
+      (*CSC: OCAML DIVERGE
+      ((element : G.element)#getAttributeNS
+      *)
+        ~namespaceURI:helmns
+        ~localName:(G.domString "xref"))#to_string
+     in
+      if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
+      else
+       begin
+        try
+         match !current_cic_infos with
+            Some (ids_to_terms, ids_to_father_ids, _, _) ->
+             let id = xpath in
+              L.to_sequent id ids_to_terms ids_to_father_ids ;
+              refresh_proof output ;
+              refresh_sequent notebook
+          | None -> assert false (* "ERROR: No current term!!!" *)
+        with
+           RefreshSequentException e ->
+            output_html outputhtml
+             ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+              "sequent: " ^ Printexc.to_string e ^ "</h1>")
+         | RefreshProofException e ->
+            output_html outputhtml
+             ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+              "proof: " ^ Printexc.to_string e ^ "</h1>")
+         | e ->
+            output_html outputhtml
+             ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>")
+       end
+  | None -> assert false (* "ERROR: No selection!!!" *)
+;;
+
+let focus () =
+ let module L = LogicalOperations in
+ let module G = Gdome in
+ let notebook = (rendering_window ())#notebook in
+ let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+  match (rendering_window ())#output#get_selection with
+    Some node ->
+     let xpath =
+      ((node : Gdome.element)#getAttributeNS
+      (*CSC: OCAML DIVERGE
+      ((element : G.element)#getAttributeNS
+      *)
+        ~namespaceURI:helmns
+        ~localName:(G.domString "xref"))#to_string
+     in
+      if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
+      else
+       begin
+        try
+         match !current_cic_infos with
+            Some (ids_to_terms, ids_to_father_ids, _, _) ->
+             let id = xpath in
+              L.focus id ids_to_terms ids_to_father_ids ;
+              refresh_sequent notebook
+          | None -> assert false (* "ERROR: No current term!!!" *)
+        with
+           RefreshSequentException e ->
+            output_html outputhtml
+             ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+              "sequent: " ^ Printexc.to_string e ^ "</h1>")
+         | RefreshProofException e ->
+            output_html outputhtml
+             ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+              "proof: " ^ Printexc.to_string e ^ "</h1>")
+         | e ->
+            output_html outputhtml
+             ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>")
+       end
+  | None -> assert false (* "ERROR: No selection!!!" *)
 ;;
 
-let execute rendering_window () =
- let inputt = (rendering_window#inputt : GEdit.text) in
- let oldinputt = (rendering_window#oldinputt : GEdit.text) in
- let outputhtml = (rendering_window#outputhtml : GHtml.xmhtml) in
- let output = (rendering_window#output : GMathView.math_view) in
- let proofw = (rendering_window#proofw : GMathView.math_view) in
+exception NoPrevGoal;;
+exception NoNextGoal;;
+
+let setgoal metano =
+ let module L = LogicalOperations in
+ let module G = Gdome in
+ let notebook = (rendering_window ())#notebook in
+ let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+  let metasenv =
+   match !ProofEngine.proof with
+      None -> assert false
+    | Some (_,metasenv,_,_) -> metasenv
+  in
+   try
+    ProofEngine.goal := Some metano ;
+    refresh_sequent ~empty_notebook:false notebook ;
+   with
+      RefreshSequentException e ->
+       output_html outputhtml
+        ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+         "sequent: " ^ Printexc.to_string e ^ "</h1>")
+    | e ->
+       output_html outputhtml
+        ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>")
+;;
+
+exception NotADefinition;;
+
+let open_ () =
+ let inputt = ((rendering_window ())#inputt : GEdit.text) in
+ let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+ let output = ((rendering_window ())#output : GMathView.math_view) in
+ let notebook = (rendering_window ())#notebook in
+  let inputlen = inputt#length in
+  let input = inputt#get_chars 0 inputlen in
+   try
+    let uri = UriManager.uri_of_string ("cic:" ^ input) in
+     CicTypeChecker.typecheck uri ;
+     let metasenv,bo,ty =
+      match CicEnvironment.get_cooked_obj uri with
+         Cic.Constant (_,Some bo,ty,_) -> [],bo,ty
+       | Cic.CurrentProof (_,metasenv,bo,ty,_) -> metasenv,bo,ty
+       | Cic.Constant _
+       | Cic.Variable _
+       | Cic.InductiveDefinition _ -> raise NotADefinition
+     in
+      ProofEngine.proof :=
+       Some (uri, metasenv, bo, ty) ;
+      ProofEngine.goal := None ;
+      refresh_sequent notebook ;
+      refresh_proof output ;
+      inputt#delete_text 0 inputlen
+   with
+      RefreshSequentException e ->
+       output_html outputhtml
+        ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+         "sequent: " ^ Printexc.to_string e ^ "</h1>")
+    | RefreshProofException e ->
+       output_html outputhtml
+        ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+         "proof: " ^ Printexc.to_string e ^ "</h1>")
+    | e ->
+       output_html outputhtml
+        ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
+;;
+
+let state () =
+ let inputt = ((rendering_window ())#inputt : GEdit.text) in
+ let outputhtml = ((rendering_window ())#outputhtml : GHtml.xmhtml) in
+ let output = ((rendering_window ())#output : GMathView.math_view) in
+ let notebook = (rendering_window ())#notebook in
   let inputlen = inputt#length in
   let input = inputt#get_chars 0 inputlen ^ "\n" in
    (* Do something interesting *)
@@ -249,37 +1320,221 @@ let execute rendering_window () =
     try
      while true do
       (* Execute the actions *)
-      match CicTextualParser.main CicTextualLexer.token lexbuf with
+      match
+       CicTextualParserContext.main [] [] CicTextualLexer.token
+        lexbuf register_alias
+      with
          None -> ()
-       | Some expr ->
-          try
-           let ty  = CicTypeChecker.type_of_aux' [] expr in
-           let whd = CicReduction.whd expr in 
-
-            let (acic, ids_to_terms, ids_to_father_ids) =
-             Cic2acic.acic_of_cic expr
-            in
-             let mml = mml_of_cic acic in
-               output#load_tree mml ;
-prerr_endline "BBB FINE RESA" ;
-               current_cic_infos := Some (ids_to_terms,ids_to_father_ids) ;
-print_endline ("?  " ^ CicPp.ppterm expr) ;
-print_endline (">> " ^ CicPp.ppterm whd) ;
-print_endline (":  " ^ CicPp.ppterm ty) ;
-flush stdout ;
-          with
-           e ->
-            print_endline ("? " ^ CicPp.ppterm expr) ;
-            raise e
+       | Some (dom,mk_metasenv_and_expr) ->
+          let metasenv,expr =
+           disambiguate_input [] [] dom mk_metasenv_and_expr
+          in
+           let _  = CicTypeChecker.type_of_aux' metasenv [] expr in
+            ProofEngine.proof :=
+             Some (UriManager.uri_of_string "cic:/dummy.con",
+                    (1,[],expr)::metasenv, Cic.Meta (1,[]), expr) ;
+            ProofEngine.goal := Some 1 ;
+            refresh_sequent notebook ;
+            refresh_proof output ;
      done
     with
        CicTextualParser0.Eof ->
-        inputt#delete_text 0 inputlen ;
-        ignore(oldinputt#insert_text input oldinputt#length) ;
+        inputt#delete_text 0 inputlen
+     | RefreshSequentException e ->
+        output_html outputhtml
+         ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+          "sequent: " ^ Printexc.to_string e ^ "</h1>")
+     | RefreshProofException e ->
+        output_html outputhtml
+         ("<h1 color=\"red\">Exception raised during the refresh of the " ^
+          "proof: " ^ Printexc.to_string e ^ "</h1>")
      | e ->
-        print_endline ("Error: " ^ Printexc.to_string e) ; flush stdout
+        output_html outputhtml
+         ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
+;;
+
+let check_term_in_scratch scratch_window metasenv context expr = 
+ try
+  let ty  = CicTypeChecker.type_of_aux' metasenv context expr in
+   let mml = mml_of_cic_term 111 (Cic.Cast (expr,ty)) in
+prerr_endline ("### " ^ CicPp.ppterm expr ^ " ==> " ^ CicPp.ppterm ty) ;
+    scratch_window#show () ;
+    scratch_window#mmlwidget#load_tree ~dom:mml
+ with
+  e ->
+   print_endline ("? " ^ CicPp.ppterm expr) ;
+   raise e
 ;;
 
+let check scratch_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 ^ "\n" in
+  let curi,metasenv =
+   match !ProofEngine.proof with
+      None -> UriManager.uri_of_string "cic:/dummy.con", []
+    | Some (curi,metasenv,_,_) -> curi,metasenv
+  in
+  let context,names_context =
+   let context =
+    match !ProofEngine.goal with
+       None -> []
+     | Some metano ->
+        let (_,canonical_context,_) =
+         List.find (function (m,_,_) -> m=metano) metasenv
+        in
+         canonical_context
+   in
+    context,
+    List.map
+     (function
+         Some (n,_) -> Some n
+       | None -> None
+     ) context
+  in
+   let lexbuf = Lexing.from_string input in
+    try
+     while true do
+      (* Execute the actions *)
+      match
+       CicTextualParserContext.main names_context metasenv CicTextualLexer.token
+        lexbuf register_alias
+      with
+         None -> ()
+       | Some (dom,mk_metasenv_and_expr) ->
+          let (metasenv',expr) =
+           disambiguate_input context metasenv dom mk_metasenv_and_expr
+          in
+           check_term_in_scratch scratch_window metasenv' context expr
+     done
+    with
+       CicTextualParser0.Eof -> ()
+     | e ->
+       output_html outputhtml
+        ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
+;;
+
+exception NoObjectsLocated;;
+
+let user_uri_choice ~title ~msg uris =
+ let uri =
+  match uris with
+     [] -> raise NoObjectsLocated
+   | [uri] -> uri
+   | uris ->
+      interactive_user_uri_choice ~title ~msg uris
+ in
+  String.sub uri 4 (String.length uri - 4)
+;;
+
+let locate () =
+ 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 ~title:"Ambiguous input."
+           ~msg:
+             ("Ambiguous input \"" ^ head ^
+              "\". Please, choose one interpetation:")
+           uris
+         in
+          ignore ((inputt#insert_text uri') ~pos:0)
+   with
+    e ->
+     output_html outputhtml
+      ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>")
+;;
+
+let searchPattern () =
+ 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.searchPattern 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 uris',exc =
+           let rec filter_out =
+            function
+               [] -> [],""
+             | uri::tl ->
+                let tl',exc = filter_out tl in
+                 try
+                  if
+                   ProofEngine.can_apply
+                    (term_of_cic_textual_parser_uri
+                     (cic_textual_parser_uri_of_string uri))
+                  then
+                   uri::tl',exc
+                  else
+                   tl',exc
+                 with
+                  e ->
+                   let exc' =
+                    "<h1 color=\"red\"> ^ Exception raised trying to apply " ^
+                     uri ^ ": " ^ Printexc.to_string e ^ " </h1>" ^ exc
+                   in
+                    tl',exc'
+           in
+            filter_out uris
+          in
+           let html' =
+            " <h1>Objects that can actually be applied: </h1> " ^
+            String.concat "<br>" uris' ^ exc ^
+            " <h1>Number of false matches: " ^
+             string_of_int (List.length uris - List.length uris') ^ "</h1>" ^
+            " <h1>Number of good matches: " ^
+             string_of_int (List.length uris') ^ "</h1>"
+           in
+            output_html outputhtml html' ;
+            let uri' =
+             user_uri_choice ~title:"Ambiguous input."
+             ~msg:"Many lemmas can be successfully applied. Please, choose one:"
+              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>")
+;;
+      
 let choose_selection
      (mmlwidget : GMathView.math_view) (element : Gdome.element option)
 =
@@ -307,12 +1562,20 @@ let choose_selection
 
 (* Stuff for the widget settings *)
 
-let export_to_postscript (output : GMathView.math_view) () =
- output#export_to_postscript ~filename:"output.ps" ();
+let export_to_postscript (output : GMathView.math_view) =
+ let lastdir = ref (Unix.getcwd ()) in
+  function () ->
+   match
+    GToolbox.select_file ~title:"Export to PostScript"
+     ~dir:lastdir ~filename:"screenshot.ps" ()
+   with
+      None -> ()
+    | Some filename ->
+       output#export_to_postscript ~filename:filename ();
 ;;
 
 let activate_t1 (output : GMathView.math_view) button_set_anti_aliasing
- button_set_kerning button_set_transparency button_export_to_postscript
+ button_set_kerning button_set_transparency export_to_postscript_menu_item
  button_t1 ()
 =
  let is_set = button_t1#active in
@@ -323,14 +1586,14 @@ let activate_t1 (output : GMathView.math_view) button_set_anti_aliasing
     button_set_anti_aliasing#misc#set_sensitive true ;
     button_set_kerning#misc#set_sensitive true ;
     button_set_transparency#misc#set_sensitive true ;
-    button_export_to_postscript#misc#set_sensitive true ;
+    export_to_postscript_menu_item#misc#set_sensitive true ;
    end
   else
    begin
     button_set_anti_aliasing#misc#set_sensitive false ;
     button_set_kerning#misc#set_sensitive false ;
     button_set_transparency#misc#set_sensitive false ;
-    button_export_to_postscript#misc#set_sensitive false ;
+    export_to_postscript_menu_item#misc#set_sensitive false ;
    end
 ;;
 
@@ -355,7 +1618,7 @@ let set_log_verbosity output log_verbosity_spinb () =
 ;;
 
 class settings_window (output : GMathView.math_view) sw
- button_export_to_postscript selection_changed_callback
+ export_to_postscript_menu_item selection_changed_callback
 =
  let settings_window = GWindow.window ~title:"GtkMathView settings" () in
  let vbox =
@@ -412,7 +1675,7 @@ object(self)
   (* Signals connection *)
   ignore(button_t1#connect#clicked
    (activate_t1 output button_set_anti_aliasing button_set_kerning
-    button_set_transparency button_export_to_postscript button_t1)) ;
+    button_set_transparency export_to_postscript_menu_item button_t1)) ;
   ignore(font_size_spinb#connect#changed (changefont output font_size_spinb)) ;
   ignore(button_set_anti_aliasing#connect#toggled
    (set_anti_aliasing output button_set_anti_aliasing));
@@ -425,83 +1688,329 @@ object(self)
   ignore(closeb#connect#clicked settings_window#misc#hide)
 end;;
 
-(* Main windows *)
+(* Scratch window *)
 
-class rendering_window output proofw (label : GMisc.label) =
+class scratch_window outputhtml =
  let window =
   GWindow.window ~title:"MathML viewer" ~border_width:2 () in
- let hbox0 =
-  GPack.hbox ~packing:window#add () in
  let vbox =
-  GPack.vbox ~packing:(hbox0#pack ~expand:false ~fill:false ~padding:5) () in
- let _ = vbox#pack ~expand:false ~fill:false ~padding:5 label#coerce in
- let scrolled_window0 =
+  GPack.vbox ~packing:window#add () in
+ let hbox =
+  GPack.hbox ~packing:(vbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let whdb =
+  GButton.button ~label:"Whd"
+   ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let reduceb =
+  GButton.button ~label:"Reduce"
+   ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let simplb =
+  GButton.button ~label:"Simpl"
+   ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let scrolled_window =
   GBin.scrolled_window ~border_width:10
    ~packing:(vbox#pack ~expand:true ~padding:5) () in
- let _ = scrolled_window0#add output#coerce in
- let hbox1 =
-  GPack.hbox ~packing:(vbox#pack ~expand:false ~fill:false ~padding:5) () in
- let settingsb =
-  GButton.button ~label:"Settings"
-   ~packing:(hbox1#pack ~expand:false ~fill:false ~padding:5) () in
- let button_export_to_postscript =
-  GButton.button ~label:"export_to_postscript"
-  ~packing:(hbox1#pack ~expand:false ~fill:false ~padding:5) () in
- let closeb =
-  GButton.button ~label:"Close"
-   ~packing:(hbox1#pack ~expand:false ~fill:false ~padding:5) () in
- let hbox2 =
-  GPack.hbox ~packing:(vbox#pack ~expand:false ~fill:false ~padding:5) () in
- let proveitb =
-  GButton.button ~label:"Prove It"
-   ~packing:(hbox2#pack ~expand:false ~fill:false ~padding:5) () in
- let oldinputt = GEdit.text ~editable:false ~width:400 ~height:180
-   ~packing:(vbox#pack ~padding:5) () in
- let executeb =
-  GButton.button ~label:"Execute"
-   ~packing:(vbox#pack ~expand:false ~fill:false ~padding:5) () in
- let inputt = GEdit.text ~editable:true ~width:400 ~height: 100
-   ~packing:(vbox#pack ~padding:5) () in
- let vbox1 =
-  GPack.vbox ~packing:(hbox0#pack ~expand:false ~fill:false ~padding:5) () in
+ let mmlwidget =
+  GMathView.math_view
+   ~packing:(scrolled_window#add) ~width:400 ~height:280 () in
+object(self)
+ method outputhtml = outputhtml
+ method mmlwidget = mmlwidget
+ method show () = window#misc#hide () ; window#show ()
+ initializer
+  ignore(mmlwidget#connect#selection_changed (choose_selection mmlwidget)) ;
+  ignore(window#event#connect#delete (fun _ -> window#misc#hide () ; true )) ;
+  ignore(whdb#connect#clicked (whd_in_scratch self)) ;
+  ignore(reduceb#connect#clicked (reduce_in_scratch self)) ;
+  ignore(simplb#connect#clicked (simpl_in_scratch self))
+end;;
+
+class page () =
+ let vbox1 = GPack.vbox () in
  let scrolled_window1 =
   GBin.scrolled_window ~border_width:10
    ~packing:(vbox1#pack ~expand:true ~padding:5) () in
- let _ = scrolled_window1#add proofw#coerce in
+ let proofw =
+  GMathView.math_view ~width:400 ~height:275
+   ~packing:(scrolled_window1#add) () in
  let hbox3 =
   GPack.hbox ~packing:(vbox1#pack ~expand:false ~fill:false ~padding:5) () in
  let exactb =
   GButton.button ~label:"Exact"
    ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let introsb =
+  GButton.button ~label:"Intros"
+   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let applyb =
+  GButton.button ~label:"Apply"
+   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let elimsimplintrosb =
+  GButton.button ~label:"ElimSimplIntros"
+   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let elimtypeb =
+  GButton.button ~label:"ElimType"
+   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let whdb =
+  GButton.button ~label:"Whd"
+   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let reduceb =
+  GButton.button ~label:"Reduce"
+   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let simplb =
+  GButton.button ~label:"Simpl"
+   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let foldb =
+  GButton.button ~label:"Fold"
+   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let cutb =
+  GButton.button ~label:"Cut"
+   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
+ let hbox4 =
+  GPack.hbox ~packing:(vbox1#pack ~expand:false ~fill:false ~padding:5) () in
+ let changeb =
+  GButton.button ~label:"Change"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let letinb =
+  GButton.button ~label:"Let ... In"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let ringb =
+  GButton.button ~label:"Ring"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let clearbodyb =
+  GButton.button ~label:"ClearBody"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let clearb =
+  GButton.button ~label:"Clear"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let fourierb =
+  GButton.button ~label:"Fourier"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let rewritesimplb =
+  GButton.button ~label:"RewriteSimpl ->"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let reflexivityb =
+  GButton.button ~label:"Reflexivity"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let hbox5 =
+  GPack.hbox ~packing:(vbox1#pack ~expand:false ~fill:false ~padding:5) () in
+ let symmetryb =
+  GButton.button ~label:"Symmetry"
+   ~packing:(hbox5#pack ~expand:false ~fill:false ~padding:5) () in
+ let transitivityb =
+  GButton.button ~label:"Transitivity"
+   ~packing:(hbox5#pack ~expand:false ~fill:false ~padding:5) () in
+ let leftb =
+  GButton.button ~label:"Left"
+   ~packing:(hbox5#pack ~expand:false ~fill:false ~padding:5) () in
+ let rightb =
+  GButton.button ~label:"Right"
+   ~packing:(hbox5#pack ~expand:false ~fill:false ~padding:5) () in
+ let assumptionb =
+  GButton.button ~label:"Assumption"
+   ~packing:(hbox5#pack ~expand:false ~fill:false ~padding:5) () in
+object
+ method proofw = proofw
+ method content = vbox1
+ initializer
+  ignore(exactb#connect#clicked exact) ;
+  ignore(applyb#connect#clicked apply) ;
+  ignore(elimsimplintrosb#connect#clicked elimsimplintros) ;
+  ignore(elimtypeb#connect#clicked elimtype) ;
+  ignore(whdb#connect#clicked whd) ;
+  ignore(reduceb#connect#clicked reduce) ;
+  ignore(simplb#connect#clicked simpl) ;
+  ignore(foldb#connect#clicked fold) ;
+  ignore(cutb#connect#clicked cut) ;
+  ignore(changeb#connect#clicked change) ;
+  ignore(letinb#connect#clicked letin) ;
+  ignore(ringb#connect#clicked ring) ;
+  ignore(clearbodyb#connect#clicked clearbody) ;
+  ignore(clearb#connect#clicked clear) ;
+  ignore(fourierb#connect#clicked fourier) ;
+  ignore(rewritesimplb#connect#clicked rewritesimpl) ;
+  ignore(reflexivityb#connect#clicked reflexivity) ;
+  ignore(symmetryb#connect#clicked symmetry) ;
+  ignore(transitivityb#connect#clicked transitivity) ;
+  ignore(leftb#connect#clicked left) ;
+  ignore(rightb#connect#clicked right) ;
+  ignore(assumptionb#connect#clicked assumption) ;
+  ignore(introsb#connect#clicked intros) ;
+ initializer
+  ignore(proofw#connect#selection_changed (choose_selection proofw)) ;
+end
+;;
+
+class notebook =
+object(self)
+ val notebook = GPack.notebook ()
+ val pages = ref []
+ val mutable skip_switch_page_event = false 
+ method notebook = notebook
+ method add_page n =
+  let new_page = new page () in
+   pages := !pages @ [n,new_page] ;
+   notebook#append_page
+    ~tab_label:((GMisc.label ~text:("?" ^ string_of_int n) ())#coerce)
+    new_page#content#coerce
+ method remove_all_pages =
+  List.iter (function _ -> notebook#remove_page 0) !pages ;
+  pages := [] ;
+ method set_current_page n =
+  let (_,page) = List.find (function (m,_) -> m=n) !pages in
+   let new_page = notebook#page_num page#content#coerce in
+    if new_page <> notebook#current_page then
+     skip_switch_page_event <- true ;
+    notebook#goto_page new_page
+ method set_empty_page = self#add_page (-1)
+ method proofw =
+  (snd (List.nth !pages notebook#current_page))#proofw
+ initializer
+  ignore
+   (notebook#connect#switch_page
+    (function i ->
+      let skip = skip_switch_page_event in
+       skip_switch_page_event <- false ;
+       if not skip then
+        try
+         let metano = fst (List.nth !pages i) in
+          setgoal metano
+        with _ -> ()
+    ))
+end
+;;
+
+(* Main window *)
+
+class rendering_window output (notebook : notebook) =
+ let window =
+  GWindow.window ~title:"MathML viewer" ~border_width:2
+   ~allow_shrink:false () in
+ let vbox_for_menu = GPack.vbox ~packing:window#add () in
+ (* menus *)
+ let menubar = GMenu.menu_bar ~packing:vbox_for_menu#pack () in
+ let factory0 = new GMenu.factory menubar in
+ let accel_group = factory0#accel_group in
+ (* file menu *)
+ let file_menu = factory0#add_submenu "File" in
+ let factory1 = new GMenu.factory file_menu ~accel_group in
+ let export_to_postscript_menu_item =
+  begin
+   ignore
+    (factory1#add_item "Load" ~key:GdkKeysyms._L ~callback:load) ;
+   ignore (factory1#add_item "Save" ~key:GdkKeysyms._S ~callback:save) ;
+   ignore (factory1#add_separator ()) ;
+   let export_to_postscript_menu_item =
+    factory1#add_item "Export to PostScript..." ~key:GdkKeysyms._E
+     ~callback:(export_to_postscript output) in
+   ignore (factory1#add_separator ()) ;
+   ignore
+    (factory1#add_item "Exit" ~key:GdkKeysyms._C ~callback:GMain.Main.quit) ;
+   export_to_postscript_menu_item
+  end in
+ (* edit menu *)
+ let edit_menu = factory0#add_submenu "Edit" in
+ let factory2 = new GMenu.factory edit_menu ~accel_group in
+ let focus_and_proveit_set_sensitive = ref (function _ -> assert false) in
+ let proveit_menu_item =
+  factory2#add_item "Prove It" ~key:GdkKeysyms._I
+   ~callback:(function () -> proveit ();!focus_and_proveit_set_sensitive false)
+ in
+ let focus_menu_item =
+  factory2#add_item "Focus" ~key:GdkKeysyms._F
+   ~callback:(function () -> focus () ; !focus_and_proveit_set_sensitive false)
+ in
+ let _ =
+  focus_and_proveit_set_sensitive :=
+   function b ->
+    proveit_menu_item#misc#set_sensitive b ;
+    focus_menu_item#misc#set_sensitive b
+ in
+ let _ = factory2#add_separator () in
+ let _ = factory2#add_item "Qed" ~key:GdkKeysyms._Q ~callback:qed in
+ let _ = !focus_and_proveit_set_sensitive false in
+ (* settings menu *)
+ let settings_menu = factory0#add_submenu "Settings" in
+ let factory3 = new GMenu.factory settings_menu ~accel_group in
+ let _ =
+  factory3#add_item "Edit Aliases" ~key:GdkKeysyms._A
+   ~callback:edit_aliases in
+ let _ = factory3#add_separator () in
+ let _ =
+  factory3#add_item "MathML Widget Preferences..." ~key:GdkKeysyms._P
+   ~callback:(function _ -> (settings_window ())#show ()) in
+ (* accel group *)
+ let _ = window#add_accel_group accel_group in
+ (* end of menus *)
+ let hbox0 =
+  GPack.hbox
+   ~packing:(vbox_for_menu#pack ~expand:true ~fill:true ~padding:5) () in
+ let vbox =
+  GPack.vbox ~packing:(hbox0#pack ~expand:true ~fill:true ~padding:5) () in
+ let scrolled_window0 =
+  GBin.scrolled_window ~border_width:10
+   ~packing:(vbox#pack ~expand:true ~padding:5) () in
+ let _ = scrolled_window0#add output#coerce in
+ let hbox4 =
+  GPack.hbox ~packing:(vbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let stateb =
+  GButton.button ~label:"State"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let openb =
+  GButton.button ~label:"Open"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let checkb =
+  GButton.button ~label:"Check"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let locateb =
+  GButton.button ~label:"Locate"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let searchpatternb =
+  GButton.button ~label:"SearchPattern"
+   ~packing:(hbox4#pack ~expand:false ~fill:false ~padding:5) () in
+ let scrolled_window1 =
+  GBin.scrolled_window ~border_width:10
+   ~packing:(vbox#pack ~expand:true ~padding:5) () in
+ let inputt = GEdit.text ~editable:true ~width:400 ~height:100
+   ~packing:scrolled_window1#add () in
+ let vboxl =
+  GPack.vbox ~packing:(hbox0#pack ~expand:true ~fill:true ~padding:5) () in
+ let _ =
+  vboxl#pack ~expand:true ~fill:true ~padding:5 notebook#notebook#coerce in
+ let frame = GBin.frame ~packing:(vboxl#pack ~expand:true ~padding:5) () in
  let outputhtml =
   GHtml.xmhtml
    ~source:"<html><body bgColor=\"white\"></body></html>"
-   ~width:400 ~height: 200
-   ~packing:(vbox1#pack ~expand:false ~fill:false ~padding:5)
+   ~width:400 ~height: 100
+   ~border_width:20
+   ~packing:frame#add
    ~show:true () in
-object(self)
+ let scratch_window = new scratch_window outputhtml in
+object
  method outputhtml = outputhtml
- method oldinputt = oldinputt
  method inputt = inputt
  method output = (output : GMathView.math_view)
- method proofw = (proofw : GMathView.math_view)
- method show () = window#show ()
+ method notebook = notebook
+ method show = window#show
  initializer
-  button_export_to_postscript#misc#set_sensitive false ;
+  notebook#set_empty_page ;
+  export_to_postscript_menu_item#misc#set_sensitive false ;
+  check_term := (check_term_in_scratch scratch_window) ;
 
   (* signal handlers here *)
   ignore(output#connect#selection_changed
-   (function elem -> proofw#unload ; choose_selection output elem)) ;
-  ignore(proofw#connect#selection_changed (choose_selection proofw)) ;
-  ignore(closeb#connect#clicked (fun _ -> GMain.Main.quit ())) ;
+   (function elem ->
+     notebook#proofw#unload ;
+     choose_selection output elem ;
+     !focus_and_proveit_set_sensitive true
+   )) ;
   let settings_window = new settings_window output scrolled_window0
-   button_export_to_postscript (choose_selection output) in
-  ignore(settingsb#connect#clicked settings_window#show) ;
-  ignore(button_export_to_postscript#connect#clicked (export_to_postscript output)) ;
-  ignore(proveitb#connect#clicked (proveit self)) ;
+   export_to_postscript_menu_item (choose_selection output) in
+  set_settings_window settings_window ;
   ignore(window#event#connect#delete (fun _ -> GMain.Main.quit () ; true )) ;
-  ignore(executeb#connect#clicked (execute self)) ;
-  ignore(exactb#connect#clicked (exact self)) ;
+  ignore(stateb#connect#clicked state) ;
+  ignore(openb#connect#clicked open_) ;
+  ignore(checkb#connect#clicked (check scratch_window)) ;
+  ignore(locateb#connect#clicked locate) ;
+  ignore(searchpatternb#connect#clicked searchPattern) ;
   Logger.log_callback :=
    (Logger.log_to_html ~print_and_flush:(output_html outputhtml))
 end;;
@@ -510,17 +2019,19 @@ end;;
 
 let initialize_everything () =
  let module U = Unix in
-  let output = GMathView.math_view ~width:400 ~height:280 ()
-  and proofw = GMathView.math_view ~width:400 ~height:275 ()
-  and label = GMisc.label ~text:"gTopLevel" () in
-    let rendering_window =
-     new rendering_window output proofw label
-    in
-     rendering_window#show () ;
-     GMain.Main.main ()
+  let output = GMathView.math_view ~width:350 ~height:280 () in
+  let notebook = new notebook in
+   let rendering_window' = new rendering_window output notebook in
+    set_rendering_window rendering_window' ;
+    rendering_window'#show () ;
+    GMain.Main.main ()
 ;;
 
 let _ =
- CicCooking.init () ;
- initialize_everything ()
+ if !usedb then
+ Mqint.init "dbname=helm_mowgli" ; 
+(* Mqint.init "host=mowgli.cs.unibo.it dbname=helm_mowgli user=helm" ; *)
+ ignore (GtkMain.Main.init ()) ;
+ initialize_everything () ;
+ if !usedb then Mqint.close ();
 ;;