X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2FgTopLevel%2FgTopLevel.ml;h=83d959ca38f77f4ed8b76ca31a24611a50971eba;hb=89262281b6e83bd2321150f81f1a0583645eb0c8;hp=47c416d8b60b9ad472098d883f4cacf2f2026345;hpb=200d1d63cd5fc282df768f97d33214c1572c89da;p=helm.git

diff --git a/helm/gTopLevel/gTopLevel.ml b/helm/gTopLevel/gTopLevel.ml
index 47c416d8b..83d959ca3 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";;
@@ -47,6 +59,16 @@ let htmlfooter =
  "</html>"
 ;;
 
+(*
+let prooffile = "/home/tassi/miohelm/tmp/currentproof";;
+*)
+let prooffile = "/public/sacerdot/currentproof";;
+(*CSC: the getter should handle the innertypes, not the FS *)
+(*
+let innertypesfile = "/home/tassi/miohelm/tmp/innertypes";;
+*)
+let innertypesfile = "/public/sacerdot/innertypes";;
+
 (* GLOBAL REFERENCES (USED BY CALLBACKS) *)
 
 let htmlheader_and_content = ref htmlheader;;
@@ -55,6 +77,17 @@ let current_cic_infos = ref None;;
 let current_goal_infos = ref None;;
 let current_scratch_infos = ref None;;
 
+(* 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 *)
 
@@ -141,17 +174,17 @@ let applyStylesheets input styles args =
 
 let mml_of_cic_object uri annobj ids_to_inner_sorts ids_to_inner_types =
  let xml =
-  Cic2Xml.print_object uri ids_to_inner_sorts annobj 
+  Cic2Xml.print_object uri ~ids_to_inner_sorts annobj 
  in
  let xmlinnertypes =
-  Cic2Xml.print_inner_types uri ids_to_inner_sorts
-   ids_to_inner_types
+  Cic2Xml.print_inner_types uri ~ids_to_inner_sorts
+   ~ids_to_inner_types
  in
   let input = Xml2Gdome.document_of_xml domImpl xml 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 "/public/fguidi/innertypes") ;
+   Xml.pp xmlinnertypes (Some innertypesfile) ;
    let output = applyStylesheets input mml_styles mml_args in
     output
 ;;
@@ -171,7 +204,8 @@ let refresh_proof (output : GMathView.math_view) =
        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)
+    (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
@@ -179,22 +213,29 @@ let refresh_proof (output : GMathView.math_view) =
      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)
+     current_cic_infos :=
+      Some (ids_to_terms,ids_to_father_ids,ids_to_conjectures,ids_to_hypotheses)
  with
-  e -> raise (RefreshProofException e)
+  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 (proofw : GMathView.math_view) =
  try
   match !ProofEngine.goal with
      None -> proofw#unload
-   | Some (_,currentsequent) ->
+   | Some metano ->
       let metasenv =
        match !ProofEngine.proof with
           None -> assert false
         | Some (_,metasenv,_,_) -> metasenv
       in
-       let sequent_gdome,ids_to_terms,ids_to_father_ids =
+      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 =
@@ -204,29 +245,47 @@ let refresh_sequent (proofw : GMathView.math_view) =
           applyStylesheets sequent_doc sequent_styles sequent_args
          in
           proofw#load_tree ~dom:sequent_mml ;
-          current_goal_infos := Some (ids_to_terms,ids_to_father_ids)
+          current_goal_infos :=
+           Some (ids_to_terms,ids_to_father_ids,ids_to_hypotheses)
  with
-  e -> raise (RefreshSequentException e)
+  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:"/public/sacerdot/guruguru1" ~indent:true ()) ;
+ ~name:"/home/galata/miohelm/guruguru1" ~indent:true ()) ;
 *)
 
-let mml_of_cic_term term =
+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 (_,(context,_)) -> context
+   | Some metano ->
+      let (_,canonical_context,_) =
+       List.find (function (m,_,_) -> m=metano) metasenv
+      in
+       canonical_context
  in
-  let metasenv =
-   match !ProofEngine.proof with
-      None -> []
-    | Some (_,metasenv,_,_) -> metasenv
-  in
-   let sequent_gdome,ids_to_terms,ids_to_father_ids =
-    SequentPp.XmlPp.print_sequent metasenv (context,term)
+   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
@@ -234,7 +293,8 @@ let mml_of_cic_term term =
      let res =
       applyStylesheets sequent_doc sequent_styles sequent_args ;
      in
-      current_scratch_infos := Some (term,ids_to_terms,ids_to_father_ids) ;
+      current_scratch_infos :=
+       Some (term,ids_to_terms,ids_to_father_ids,ids_to_hypotheses) ;
       res
 ;;
 
@@ -299,23 +359,34 @@ let call_tactic_with_input tactic rendering_window () =
        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 context =
     List.map
      (function
-         ProofEngine.Definition (n,_)
-       | ProofEngine.Declaration (n,_) -> n)
+         Some (n,_) -> Some n
+       | None -> None)
      (match !ProofEngine.goal with
          None -> assert false
-       | Some (_,(ctx,_)) -> ctx
+       | Some metano ->
+          let (_,canonical_context,_) =
+           List.find (function (m,_,_) -> m=metano) metasenv
+          in
+           canonical_context
      )
    in
     try
      while true do
       match
-       CicTextualParserContext.main curi context CicTextualLexer.token lexbuf
+       CicTextualParserContext.main
+        curi context metasenv CicTextualLexer.token lexbuf
       with
          None -> ()
-       | Some expr ->
+       | Some (metasenv',expr) ->
+          ProofEngine.proof := Some (uri,metasenv',bo,ty) ;
           tactic expr ;
           refresh_sequent proofw ;
           refresh_proof output
@@ -365,7 +436,7 @@ let call_tactic_with_goal_input tactic rendering_window () =
         begin
          try
           match !current_goal_infos with
-             Some (ids_to_terms, ids_to_father_ids) ->
+             Some (ids_to_terms, ids_to_father_ids,_) ->
               let id = xpath in
                tactic (Hashtbl.find ids_to_terms id) ;
                refresh_sequent rendering_window#proofw ;
@@ -419,7 +490,7 @@ let call_tactic_with_input_and_goal_input tactic rendering_window () =
         begin
          try
           match !current_goal_infos with
-             Some (ids_to_terms, ids_to_father_ids) ->
+             Some (ids_to_terms, ids_to_father_ids,_) ->
               let id = xpath in
                (* Let's parse the input *)
                let inputlen = inputt#length in
@@ -430,25 +501,35 @@ let call_tactic_with_input_and_goal_input tactic rendering_window () =
                     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 context =
                  List.map
                   (function
-                      ProofEngine.Definition (n,_)
-                    | ProofEngine.Declaration (n,_) -> n)
+                      Some (n,_) -> Some n
+                    | None -> None)
                   (match !ProofEngine.goal with
                       None -> assert false
-                    | Some (_,(ctx,_)) -> ctx
+                    | Some metano ->
+                       let (_,canonical_context,_) =
+                        List.find (function (m,_,_) -> m=metano) metasenv
+                       in
+                        canonical_context
                   )
                 in
                  begin
                   try
                    while true do
                     match
-                     CicTextualParserContext.main curi context
+                     CicTextualParserContext.main curi context metasenv
                       CicTextualLexer.token lexbuf
                     with
                        None -> ()
-                     | Some expr ->
+                     | Some (metasenv',expr) ->
+                        ProofEngine.proof := Some (uri,metasenv',bo,ty) ;
                         tactic ~goal_input:(Hashtbl.find ids_to_terms id)
                          ~input:expr ;
                         refresh_sequent proofw ;
@@ -506,10 +587,10 @@ let call_tactic_with_goal_input_in_scratch tactic scratch_window () =
          try
           match !current_scratch_infos with
              (* term is the whole goal in the scratch_area *)
-             Some (term,ids_to_terms, ids_to_father_ids) ->
+             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 expr 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!!!" *)
@@ -523,6 +604,60 @@ let call_tactic_with_goal_input_in_scratch tactic scratch_window () =
        ("<h1 color=\"red\">No term selected</h1>")
 ;;
 
+let call_tactic_with_hypothesis_input tactic rendering_window () =
+ let module L = LogicalOperations in
+ let module G = Gdome in
+  let proofw = (rendering_window#proofw : GMathView.math_view) 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 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 rendering_window#proofw ;
+               refresh_proof rendering_window#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 proofw
+          | 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 proofw ;
+             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 rendering_window = call_tactic ProofEngine.intros rendering_window;;
 let exact rendering_window =
  call_tactic_with_input ProofEngine.exact rendering_window
@@ -530,8 +665,11 @@ let exact rendering_window =
 let apply rendering_window =
  call_tactic_with_input ProofEngine.apply rendering_window
 ;;
-let elimintros rendering_window =
- call_tactic_with_input ProofEngine.elim_intros rendering_window
+let elimintrossimpl rendering_window =
+ call_tactic_with_input ProofEngine.elim_intros_simpl rendering_window
+;;
+let elimtype rendering_window =
+ call_tactic_with_input ProofEngine.elim_type rendering_window
 ;;
 let whd rendering_window =
  call_tactic_with_goal_input ProofEngine.whd rendering_window
@@ -554,6 +692,20 @@ let change rendering_window =
 let letin rendering_window =
  call_tactic_with_input ProofEngine.letin rendering_window
 ;;
+let ring rendering_window = call_tactic ProofEngine.ring rendering_window;;
+let clearbody rendering_window =
+ call_tactic_with_hypothesis_input ProofEngine.clearbody rendering_window
+;;
+let clear rendering_window =
+ call_tactic_with_hypothesis_input ProofEngine.clear rendering_window
+;;
+let fourier rendering_window =
+ call_tactic ProofEngine.fourier rendering_window
+;;
+let rewritesimpl rendering_window =
+ call_tactic_with_input ProofEngine.rewrite_simpl rendering_window
+;;
+
 
 
 let whd_in_scratch scratch_window =
@@ -578,7 +730,7 @@ let simpl_in_scratch scratch_window =
 exception OpenConjecturesStillThere;;
 exception WrongProof;;
 
-let save rendering_window () =
+let qed rendering_window () =
  match !ProofEngine.proof with
     None -> assert false
   | Some (uri,[],bo,ty) ->
@@ -591,7 +743,7 @@ let save rendering_window () =
        let proof = Cic.Definition (UriManager.name_of_uri uri,bo,ty,[]) in
         let
          (acic,ids_to_terms,ids_to_father_ids,ids_to_inner_sorts,
-          ids_to_inner_types)
+          ids_to_inner_types,ids_to_conjectures,ids_to_hypotheses)
         =
          Cic2acic.acic_object_of_cic_object proof
         in
@@ -599,13 +751,90 @@ let save rendering_window () =
           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)
+          current_cic_infos :=
+           Some
+            (ids_to_terms,ids_to_father_ids,ids_to_conjectures,
+             ids_to_hypotheses)
       end
      else
       raise WrongProof
   | _ -> raise OpenConjecturesStillThere
 ;;
 
+(*????
+let dtdname = "http://www.cs.unibo.it/helm/dtd/cic.dtd";;
+*)
+let dtdname = "/home/tassi/miohelm/helm/dtd/cic.dtd";;
+
+let save rendering_window () =
+ let outputhtml = (rendering_window#outputhtml : GHtml.xmhtml) in
+  match !ProofEngine.proof with
+     None -> assert false
+   | Some (uri, metasenv, bo, ty) ->
+      let currentproof =
+       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 = Cic2Xml.print_object uri ~ids_to_inner_sorts acurrentproof in
+         let xml' =
+          [< Xml.xml_cdata "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n" ;
+             Xml.xml_cdata
+              ("<!DOCTYPE CurrentProof SYSTEM \"" ^ dtdname ^ "\">\n\n") ;
+             xml
+          >]
+         in
+          Xml.pp ~quiet:true xml' (Some prooffile) ;
+          output_html outputhtml
+           ("<h1 color=\"Green\">Current proof saved to " ^
+            prooffile ^ "</h1>")
+;;
+
+(* Used to typecheck the loaded proofs *)
+let typecheck_loaded_proof metasenv bo ty =
+ let module T = CicTypeChecker in
+  (*CSC: bisogna controllare anche il metasenv!!! *)
+  ignore (T.type_of_aux' metasenv [] ty) ;
+  ignore (T.type_of_aux' metasenv [] bo)
+;;
+
+let load rendering_window () =
+ 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
+  try
+   let uri = UriManager.uri_of_string "cic:/dummy.con" in
+    match CicParser.obj_of_xml prooffile uri 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 proofw ;
+         output_html outputhtml
+          ("<h1 color=\"Green\">Current proof 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 proveit rendering_window () =
  let module L = LogicalOperations in
  let module G = Gdome in
@@ -625,10 +854,10 @@ let proveit rendering_window () =
        begin
         try
          match !current_cic_infos with
-            Some (ids_to_terms, ids_to_father_ids) ->
+            Some (ids_to_terms, ids_to_father_ids, _, _) ->
              let id = xpath in
-              if L.to_sequent id ids_to_terms ids_to_father_ids then
-               refresh_proof rendering_window#output ;
+              L.to_sequent id ids_to_terms ids_to_father_ids ;
+              refresh_proof rendering_window#output ;
               refresh_sequent rendering_window#proofw
           | None -> assert false (* "ERROR: No current term!!!" *)
         with
@@ -647,6 +876,98 @@ let proveit rendering_window () =
   | None -> assert false (* "ERROR: No selection!!!" *)
 ;;
 
+let focus rendering_window () =
+ let module L = LogicalOperations in
+ let module G = Gdome 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 rendering_window#proofw
+          | 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!!!" *)
+;;
+
+exception NoPrevGoal;;
+exception NoNextGoal;;
+
+let prevgoal metasenv metano =
+ let rec aux =
+  function
+     [] -> assert false
+   | [(m,_,_)] -> raise NoPrevGoal
+   | (n,_,_)::(m,_,_)::_ when m=metano -> n
+   | _::tl -> aux tl
+ in
+  aux metasenv
+;;
+
+let nextgoal metasenv metano =
+ let rec aux =
+  function
+     [] -> assert false
+   | [(m,_,_)] when m = metano -> raise NoNextGoal
+   | (m,_,_)::(n,_,_)::_ when m=metano -> n
+   | _::tl -> aux tl
+ in
+  aux metasenv
+;;
+
+let prev_or_next_goal select_goal rendering_window () =
+ let module L = LogicalOperations in
+ let module G = Gdome in
+ let outputhtml = (rendering_window#outputhtml : GHtml.xmhtml) in
+  let metasenv =
+   match !ProofEngine.proof with
+      None -> assert false
+    | Some (_,metasenv,_,_) -> metasenv
+  in
+  let metano =
+   match !ProofEngine.goal with
+      None -> assert false
+    | Some m -> m
+  in
+   try
+    ProofEngine.goal := Some (select_goal metasenv metano) ;
+    refresh_sequent rendering_window#proofw
+   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_ rendering_window () =
@@ -708,8 +1029,8 @@ let state rendering_window () =
           let _  = CicTypeChecker.type_of_aux' [] [] expr in
            ProofEngine.proof :=
             Some (UriManager.uri_of_string "cic:/dummy.con",
-                   [1,expr], Cic.Meta 1, expr) ;
-           ProofEngine.goal := Some (1,([],expr)) ;
+                   [1,[],expr], Cic.Meta (1,[]), expr) ;
+           ProofEngine.goal := Some 1 ;
            refresh_sequent proofw ;
            refresh_proof output ;
      done
@@ -742,18 +1063,22 @@ let check rendering_window scratch_window () =
       None -> UriManager.uri_of_string "cic:/dummy.con", []
     | Some (curi,metasenv,_,_) -> curi,metasenv
   in
-  let ciccontext,names_context =
+  let context,names_context =
    let context =
     match !ProofEngine.goal with
        None -> []
-     | Some (_,(ctx,_)) -> ctx
+     | Some metano ->
+        let (_,canonical_context,_) =
+         List.find (function (m,_,_) -> m=metano) metasenv
+        in
+         canonical_context
    in
-    ProofEngine.cic_context_of_named_context context,
-     List.map
-      (function
-          ProofEngine.Declaration (n,_)
-        | ProofEngine.Definition (n,_) -> n
-      ) context
+    context,
+    List.map
+     (function
+         Some (n,_) -> Some n
+       | None -> None
+     ) context
   in
    (* Do something interesting *)
    let lexbuf = Lexing.from_string input in
@@ -761,14 +1086,14 @@ let check rendering_window scratch_window () =
      while true do
       (* Execute the actions *)
       match
-       CicTextualParserContext.main curi names_context CicTextualLexer.token
-        lexbuf
+       CicTextualParserContext.main curi names_context metasenv
+        CicTextualLexer.token lexbuf
       with
          None -> ()
-       | Some expr ->
+       | Some (metasenv',expr) ->
           try
-           let ty  = CicTypeChecker.type_of_aux' metasenv ciccontext expr in
-            let mml = mml_of_cic_term (Cic.Cast (expr,ty)) in
+           let ty  = CicTypeChecker.type_of_aux' metasenv' context expr in
+            let mml = mml_of_cic_term 111 (Cic.Cast (expr,ty)) in
              scratch_window#show () ;
              scratch_window#mmlwidget#load_tree ~dom:mml
           with
@@ -783,28 +1108,92 @@ let check rendering_window scratch_window () =
         ("<h1 color=\"red\">" ^ Printexc.to_string e ^ "</h1>") ;
 ;;
 
+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   
-    output_html outputhtml (Mquery.locate input) ;
-    inputt#delete_text 0 inputlen 
+   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 -> 
+    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 result =
-      match !ProofEngine.goal with
-         | None -> ""
-         | Some (_, (_, t)) -> (Mquery.backward t)
-      in 
-   output_html outputhtml result
+ 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>")
+;;
       
 let choose_selection
      (mmlwidget : GMathView.math_view) (element : Gdome.element option)
@@ -1009,9 +1398,15 @@ class rendering_window output proofw (label : GMisc.label) =
  let button_export_to_postscript =
   GButton.button ~label:"export_to_postscript"
   ~packing:(hbox1#pack ~expand:false ~fill:false ~padding:5) () in
+ let qedb =
+  GButton.button ~label:"Qed"
+   ~packing:(hbox1#pack ~expand:false ~fill:false ~padding:5) () in
  let saveb =
   GButton.button ~label:"Save"
    ~packing:(hbox1#pack ~expand:false ~fill:false ~padding:5) () in
+ let loadb =
+  GButton.button ~label:"Load"
+   ~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
@@ -1020,6 +1415,15 @@ class rendering_window output proofw (label : GMisc.label) =
  let proveitb =
   GButton.button ~label:"Prove It"
    ~packing:(hbox2#pack ~expand:false ~fill:false ~padding:5) () in
+ let focusb =
+  GButton.button ~label:"Focus"
+   ~packing:(hbox2#pack ~expand:false ~fill:false ~padding:5) () in
+ let prevgoalb =
+  GButton.button ~label:"<"
+   ~packing:(hbox2#pack ~expand:false ~fill:false ~padding:5) () in
+ let nextgoalb =
+  GButton.button ~label:">"
+   ~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 hbox4 =
@@ -1058,8 +1462,11 @@ class rendering_window output proofw (label : GMisc.label) =
  let applyb =
   GButton.button ~label:"Apply"
    ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () in
- let elimintrosb =
-  GButton.button ~label:"ElimIntros"
+ let elimintrossimplb =
+  GButton.button ~label:"ElimIntrosSimpl"
+   ~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"
@@ -1079,9 +1486,26 @@ class rendering_window output proofw (label : GMisc.label) =
  let changeb =
   GButton.button ~label:"Change"
    ~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 letinb =
   GButton.button ~label:"Let ... In"
-   ~packing:(hbox3#pack ~expand:false ~fill:false ~padding:5) () 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 outputhtml =
   GHtml.xmhtml
    ~source:"<html><body bgColor=\"white\"></body></html>"
@@ -1108,8 +1532,13 @@ object(self)
    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(qedb#connect#clicked (qed self)) ;
   ignore(saveb#connect#clicked (save self)) ;
+  ignore(loadb#connect#clicked (load self)) ;
   ignore(proveitb#connect#clicked (proveit self)) ;
+  ignore(focusb#connect#clicked (focus self)) ;
+  ignore(prevgoalb#connect#clicked (prev_or_next_goal prevgoal self)) ;
+  ignore(nextgoalb#connect#clicked (prev_or_next_goal nextgoal self)) ;
   ignore(window#event#connect#delete (fun _ -> GMain.Main.quit () ; true )) ;
   ignore(stateb#connect#clicked (state self)) ;
   ignore(openb#connect#clicked (open_ self)) ;
@@ -1118,7 +1547,8 @@ object(self)
   ignore(backwardb#connect#clicked (backward self)) ;
   ignore(exactb#connect#clicked (exact self)) ;
   ignore(applyb#connect#clicked (apply self)) ;
-  ignore(elimintrosb#connect#clicked (elimintros self)) ;
+  ignore(elimintrossimplb#connect#clicked (elimintrossimpl self)) ;
+  ignore(elimtypeb#connect#clicked (elimtype self)) ;
   ignore(whdb#connect#clicked (whd self)) ;
   ignore(reduceb#connect#clicked (reduce self)) ;
   ignore(simplb#connect#clicked (simpl self)) ;
@@ -1126,6 +1556,11 @@ object(self)
   ignore(cutb#connect#clicked (cut self)) ;
   ignore(changeb#connect#clicked (change self)) ;
   ignore(letinb#connect#clicked (letin self)) ;
+  ignore(ringb#connect#clicked (ring self)) ;
+  ignore(clearbodyb#connect#clicked (clearbody self)) ;
+  ignore(clearb#connect#clicked (clear self)) ;
+  ignore(fourierb#connect#clicked (fourier self)) ;
+  ignore(rewritesimplb#connect#clicked (rewritesimpl self)) ;
   ignore(introsb#connect#clicked (intros self)) ;
   Logger.log_callback :=
    (Logger.log_to_html ~print_and_flush:(output_html outputhtml))
@@ -1133,20 +1568,86 @@ end;;
 
 (* MAIN *)
 
+let rendering_window = ref None;;
+
 let initialize_everything () =
  let module U = Unix in
-  let output = GMathView.math_view ~width:400 ~height:280 ()
+  let output = GMathView.math_view ~width:350 ~height:280 ()
   and proofw = GMathView.math_view ~width:400 ~height:275 ()
   and label = GMisc.label ~text:"gTopLevel" () in
-    let rendering_window =
+    let rendering_window' =
      new rendering_window output proofw label
     in
-     rendering_window#show () ;
+     rendering_window := Some rendering_window' ;
+     rendering_window'#show () ;
      GMain.Main.main ()
 ;;
 
 let _ =
  CicCooking.init () ;
+ if !usedb then
+  begin
+   Mqint.init "host=mowgli.cs.unibo.it dbname=helm user=helm" ;
+   CicTextualParser0.set_locate_object
+    (function 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
+       begin
+        match !rendering_window with
+           None -> assert false
+         | Some rw -> output_html rw#outputhtml html ;
+       end ;
+       let uri = 
+        match uris with
+           [] ->
+            (match
+              (GToolbox.input_string ~title:"Unknown input"
+               ("No URI matching \"" ^ id ^ "\" found. Please enter its URI"))
+             with
+                None -> None
+              | Some uri -> Some ("cic:" ^ uri)
+            )
+         | [uri] -> Some uri
+         | _ ->
+           let choice =
+            GToolbox.question_box ~title:"Ambiguous input."
+             ~buttons:uris ~default:1 "Ambiguous input. Please, choose one."
+           in
+            if choice > 0 then
+             Some (List.nth uris (choice - 1))
+            else
+             (* No choice from the user *)
+             None
+       in
+        match uri with
+           Some uri' ->
+            (* Constant *)
+            if String.sub uri' (String.length uri' - 4) 4 = ".con" then
+(*CSC: what cooking number? Here I always use 0, which may be bugged *)
+             Some (Cic.Const (UriManager.uri_of_string uri',0))
+            else
+             (try
+               (* Inductive Type *)
+               let uri'',typeno = CicTextualLexer.indtyuri_of_uri uri' in
+(*CSC: what cooking number? Here I always use 0, which may be bugged *)
+                Some (Cic.MutInd (uri'',0,typeno))
+              with
+               _ ->
+                (* Constructor of an Inductive Type *)
+                let uri'',typeno,consno =
+                 CicTextualLexer.indconuri_of_uri uri'
+                in
+(*CSC: what cooking number? Here I always use 0, which may be bugged *)
+                 Some (Cic.MutConstruct (uri'',0,typeno,consno))
+             )
+         | None -> None
+    )
+  end ;
  ignore (GtkMain.Main.init ()) ;
- initialize_everything ()
+ initialize_everything () ;
+ if !usedb then Mqint.close ();
 ;;