X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2FmatitaScript.ml;h=e31dd7a1540e5642fde6d525bad6f4d1aac10a3f;hb=ecd0ab19b82f611974bd76f3c740c842f566009d;hp=2d1c4d702f023c59b83439e69a62126d4cc83667;hpb=3b5b254f2faa600a14a837e95f94f953dc9959c7;p=helm.git

diff --git a/helm/matita/matitaScript.ml b/helm/matita/matitaScript.ml
index 2d1c4d702..e31dd7a15 100644
--- a/helm/matita/matitaScript.ml
+++ b/helm/matita/matitaScript.ml
@@ -24,9 +24,11 @@
  *)
 
 open Printf
-
 open MatitaTypes
 
+let debug = true
+let debug_print = if  debug then prerr_endline else ignore
+
   (** raised when one of the script margins (top or bottom) is reached *)
 exception Margin
 
@@ -34,8 +36,16 @@ let safe_substring s i j =
   try String.sub s i j with Invalid_argument _ -> assert false
 
 let heading_nl_RE = Pcre.regexp "^\\s*\n\\s*"
-let blanks_RE = Pcre.regexp "^\\s*$"
-
+let only_dust_RE = Pcre.regexp "^(\\s|\n|%%[^\n]*\n)*$"
+let multiline_RE = Pcre.regexp "^\n[^\n]+$"
+let newline_RE = Pcre.regexp "\n"
+ 
+let comment str =
+  if Pcre.pmatch ~rex:multiline_RE str then
+    "\n(** " ^ (Pcre.replace ~rex:newline_RE str) ^ " **)"
+  else
+    "\n(**\n" ^ str ^ "\n**)"
+                     
 let first_line s =
   let s = Pcre.replace ~rex:heading_nl_RE s in
   try
@@ -51,83 +61,363 @@ let prepend_text header base =
 
   (** creates a statement AST for the Goal tactic, e.g. "goal 7" *)
 let goal_ast n =
-  let module A = TacticAst in
-  let loc = CicAst.dummy_floc in
-  A.Tactical (loc, A.Tactic (loc, A.Goal (loc, n)))
-
-let eval_statement status mathviewer user_goal s =
-  let st = CicTextualParser2.parse_statement (Stream.of_string s) in
-  match st with
-  | TacticAst.Command (loc, _) | TacticAst.Tactical (loc, _) ->
-      let parsed_text_length = snd (CicAst.loc_of_floc loc) in
-      let parsed_text = safe_substring s 0 parsed_text_length in
-      let goal_changed = ref false in
-      let status =
-        match status.proof_status with
-        | Incomplete_proof (_, goal) when goal <> user_goal ->
-            goal_changed := true;
-            MatitaEngine.eval_ast status (goal_ast user_goal)
-        | _ -> status
+  let module A = GrafiteAst in
+  let loc = Disambiguate.dummy_floc in
+  A.Executable (loc, A.Tactical (loc, A.Tactic (loc, A.Goal (loc, n))))
+
+type guistuff = {
+  mathviewer:MatitaTypes.mathViewer;
+  urichooser: UriManager.uri list -> UriManager.uri list;
+  ask_confirmation: title:string -> message:string -> [`YES | `NO | `CANCEL];
+  develcreator: containing:string option -> unit;
+  mutable filenamedata: string option * MatitamakeLib.development option
+}
+
+let eval_with_engine guistuff status user_goal parsed_text st =
+  let module TA = GrafiteAst in
+  let module TAPp = GrafiteAstPp in
+  let include_ = 
+    match guistuff.filenamedata with
+    | None,None -> []
+    | None,Some devel -> [MatitamakeLib.root_for_development devel ]
+    | Some f,_ -> 
+        match MatitamakeLib.development_for_dir (Filename.dirname f) with
+        | None -> []
+        | Some devel -> [MatitamakeLib.root_for_development devel ]
+  in
+  let parsed_text_length = String.length parsed_text in
+  let loc, ex = 
+    match st with TA.Executable (loc,ex) -> loc, ex | _ -> assert false 
+  in
+  let goal_changed = ref false in
+  let status =
+    match status.proof_status with
+      | Incomplete_proof (_, goal) when goal <> user_goal ->
+          goal_changed := true;
+          MatitaEngine.eval_ast ~include_paths:include_
+            ~do_heavy_checks:true status (goal_ast user_goal)
+      | _ -> status
+  in
+  let new_status = 
+    MatitaEngine.eval_ast 
+      ~include_paths:include_ ~do_heavy_checks:true status st 
+  in
+  let new_aliases =
+    match ex with
+      | TA.Command (_, TA.Alias _)
+      | TA.Command (_, TA.Include _) -> DisambiguateTypes.Environment.empty
+      | _ -> MatitaSync.alias_diff ~from:status new_status
+  in
+  (* we remove the defined object since we consider them "automathic aliases" *)
+  let new_aliases = 
+    let module DTE = DisambiguateTypes.Environment in
+    let module UM = UriManager in
+    DTE.fold (
+      fun k ((v,_) as value) acc -> 
+        let b = 
+          try
+            let v = UM.strip_xpointer (UM.uri_of_string v) in
+            List.exists (fun (s,_) -> s = v) new_status.objects 
+          with UM.IllFormedUri _ -> false
+        in
+        if b then 
+          acc
+        else
+          DTE.add k value acc
+    ) new_aliases DTE.empty
+  in
+  let new_text =
+    if DisambiguateTypes.Environment.is_empty new_aliases then
+      parsed_text
+    else
+      prepend_text (DisambiguatePp.pp_environment new_aliases)
+        parsed_text
+  in
+  let new_text =
+    if !goal_changed then
+      prepend_text
+        (TAPp.pp_tactic (TA.Goal (loc, user_goal))(* ^ "\n"*))
+        new_text
+    else
+      new_text
+  in
+    [ new_status, new_text ], parsed_text_length
+
+let eval_with_engine guistuff status user_goal parsed_text st =
+  try
+    eval_with_engine guistuff status user_goal parsed_text st
+  with
+    MatitaEngine.UnableToInclude what as exc ->
+      let compile_needed_and_go_on d =
+        let root = MatitamakeLib.root_for_development d in
+        let target = root ^ "/" ^ what in
+        let refresh_cb () = 
+          while Glib.Main.pending () do ignore(Glib.Main.iteration false); done
+        in
+        if not(MatitamakeLib.build_development_in_bg ~target refresh_cb d) then
+          raise exc
+        else
+          eval_with_engine guistuff status user_goal parsed_text st
       in
-      let new_status = MatitaEngine.eval_ast status st in
-      let new_aliases =
-        match st with
-        | TacticAst.Command (_, TacticAst.Alias _) ->
-            DisambiguateTypes.Environment.empty
-        | _ -> MatitaSync.alias_diff ~from:status new_status
+      let do_nothing () = [], 0 in
+      let handle_with_devel d =
+        let name = MatitamakeLib.name_for_development d in
+        let title = "Unable to include " ^ what in
+        let message = 
+          what ^ " is handled by development <b>" ^ name ^ "</b>.\n\n" ^
+          "<i>Should I compile it and Its dependencies?</i>"
+        in
+        (match guistuff.ask_confirmation ~title ~message with
+        | `YES -> compile_needed_and_go_on d
+        | `NO -> raise exc
+        | `CANCEL -> do_nothing ())
       in
-      let new_text =
-        if DisambiguateTypes.Environment.is_empty new_aliases then
-          parsed_text
-        else
-          prepend_text (CicTextualParser2.EnvironmentP3.to_string new_aliases)
-            parsed_text
+      let handle_withoud_devel filename =
+        let title = "Unable to include " ^ what in
+        let message = 
+         what ^ " is <b>not</b> handled by a development.\n" ^
+         "All dependencies are authomatically solved for a development.\n\n" ^
+         "<i>Do you want to set up a development?</i>"
+        in
+        (match guistuff.ask_confirmation ~title ~message with
+        | `YES -> 
+            (match filename with
+            | Some f -> 
+                guistuff.develcreator ~containing:(Some (Filename.dirname f))
+            | None -> guistuff.develcreator ~containing:None);
+            do_nothing ()
+        | `NO -> raise exc
+        | `CANCEL -> do_nothing())
       in
-      let new_text =
-        if !goal_changed then
-          prepend_text
-            (TacticAstPp.pp_tactic (TacticAst.Goal (loc, user_goal))(* ^ "\n"*))
-            new_text
-        else
-          new_text
+      match guistuff.filenamedata with
+      | None,None -> handle_withoud_devel None
+      | None,Some d -> handle_with_devel d
+      | Some f,_ ->
+          match MatitamakeLib.development_for_dir (Filename.dirname f) with
+          | None -> handle_withoud_devel (Some f)
+          | Some d -> handle_with_devel d
+;;
+
+let disambiguate term status =
+  let module MD = MatitaDisambiguator in
+  let dbd = MatitaDb.instance () in
+  let metasenv = MatitaMisc.get_proof_metasenv status in
+  let context = MatitaMisc.get_proof_context status in
+  let aliases = MatitaMisc.get_proof_aliases status in
+  let interps = MD.disambiguate_term dbd context metasenv aliases term in
+  match interps with 
+  | [_,_,x,_] -> x
+  | _ -> assert false
+ 
+let eval_macro guistuff status parsed_text script mac
+=
+  let module TA = GrafiteAst in
+  let module TAPp = GrafiteAstPp in
+  let module MQ = MetadataQuery in
+  let module MDB = MatitaDb in
+  let module CTC = CicTypeChecker in
+  let module CU = CicUniv in
+  (* no idea why ocaml wants this *)
+  let advance ?statement () = script#advance ?statement () in
+  let parsed_text_length = String.length parsed_text in
+  let dbd = MatitaDb.instance () in
+  match mac with
+  (* WHELP's stuff *)
+  | TA.WMatch (loc, term) -> 
+      let term = disambiguate term status in
+      let l =  MQ.match_term ~dbd term in
+      let entry = `Whelp (TAPp.pp_macro_cic (TA.WMatch (loc, term)), l) in
+      guistuff.mathviewer#show_uri_list ~reuse:true ~entry l;
+      [], parsed_text_length
+  | TA.WInstance (loc, term) ->
+      let term = disambiguate term status in
+      let l = MQ.instance ~dbd term in
+      let entry = `Whelp (TAPp.pp_macro_cic (TA.WInstance (loc, term)), l) in
+      guistuff.mathviewer#show_uri_list ~reuse:true ~entry l;
+      [], parsed_text_length
+  | TA.WLocate (loc, s) -> 
+      let l = MQ.locate ~dbd s in
+      let entry = `Whelp (TAPp.pp_macro_cic (TA.WLocate (loc, s)), l) in
+      guistuff.mathviewer#show_uri_list ~reuse:true ~entry l;
+      [], parsed_text_length
+  | TA.WElim (loc, term) ->
+      let term = disambiguate term status in
+      let uri =
+        match term with
+        | Cic.MutInd (uri,n,_) -> UriManager.uri_of_uriref uri n None 
+        | _ -> failwith "Not a MutInd"
       in
-      [ new_status, new_text ], parsed_text_length
-  | TacticAst.Macro (loc, mac) ->
-      let parsed_text_length = snd (CicAst.loc_of_floc loc) in
-      (match mac with (* TODO *)
-       | TacticAst.Hint _ -> 
-          let s = MatitaMisc.get_proof_status status in
-          let l = List.map fst
-            (MetadataQuery.experimental_hint ~dbd:(MatitaDb.instance ()) s) 
-          in
-          List.iter prerr_endline l;
-          prerr_endline "FINITA LA HINT"; assert false
-        | TacticAst.Check (_,t) ->
-            let metasenv = MatitaMisc.get_proof_metasenv status in
-            let context = MatitaMisc.get_proof_context status in
-            let aliases = MatitaMisc.get_proof_aliases status in
-            let db = MatitaDb.instance () in
-            let (_env,_metasenv,term,_graph) = 
-              let interps = 
-                MatitaDisambiguator.disambiguate_term db context metasenv 
-                  aliases t 
-              in
-              match interps with 
-              | [x] -> x
-              | _ -> assert false
-            in
-            let ty,_ = 
-              CicTypeChecker.type_of_aux' metasenv context term
-                CicUniv.empty_ugraph 
-            in
-            mathviewer # show_term (`Cic (ty,metasenv) );
-            [ status, "" ] , parsed_text_length
-       | _ -> failwith "not implemented")
+      let l = MQ.elim ~dbd uri in
+      let entry = `Whelp (TAPp.pp_macro_cic (TA.WElim (loc, term)), l) in
+      guistuff.mathviewer#show_uri_list ~reuse:true ~entry l;
+      [], parsed_text_length
+  | TA.WHint (loc, term) ->
+      let term = disambiguate term status in
+      let s = ((None,[0,[],term], Cic.Meta (0,[]) ,term),0) in
+      let l = List.map fst (MQ.experimental_hint ~dbd s) in
+      let entry = `Whelp (TAPp.pp_macro_cic (TA.WHint (loc, term)), l) in
+      guistuff.mathviewer#show_uri_list ~reuse:true ~entry l;
+      [], parsed_text_length
+  (* REAL macro *)
+  | TA.Hint loc -> 
+      let s = MatitaMisc.get_proof_status status in
+      let l = List.map fst (MQ.experimental_hint ~dbd s) in
+      let selected = guistuff.urichooser l in
+      (match selected with
+      | [] -> [], parsed_text_length
+      | [uri] -> 
+        let ast = 
+         TA.Executable (loc,
+          (TA.Tactical (loc, 
+            TA.Tactic (loc,
+             TA.Apply (loc, CicNotationPt.Uri (UriManager.string_of_uri uri,None))))))
+        in
+        let new_status = MatitaEngine.eval_ast status ast in
+        let extra_text = 
+          comment parsed_text ^ 
+          "\n" ^ TAPp.pp_statement ast
+        in
+        [ new_status , extra_text ], parsed_text_length
+      | _ -> 
+          MatitaLog.error 
+            "The result of the urichooser should be only 1 uri, not:\n";
+          List.iter (
+            fun u -> MatitaLog.error (UriManager.string_of_uri u ^ "\n")
+          ) selected;
+          assert false)
+  | TA.Check (_,term) ->
+      let metasenv = MatitaMisc.get_proof_metasenv status in
+      let context = MatitaMisc.get_proof_context status in
+      let aliases = MatitaMisc.get_proof_aliases status in
+      let interps = 
+        MatitaDisambiguator.disambiguate_term 
+          dbd context metasenv aliases term 
+      in
+      let _, metasenv , term, ugraph =
+        match interps with 
+        | [x] -> x
+        | _ -> assert false
+      in
+      let ty,_ = CTC.type_of_aux' metasenv context term ugraph in
+      let t_and_ty = Cic.Cast (term,ty) in
+      guistuff.mathviewer#show_entry (`Cic (t_and_ty,metasenv));
+      [], parsed_text_length
+(*   | TA.Abort _ -> 
+      let rec go_back () =
+        let status = script#status.proof_status in
+        match status with
+        | No_proof -> ()
+        | _ -> script#retract ();go_back()
+      in
+      [], parsed_text_length, Some go_back
+  | TA.Redo (_, Some i) ->  [], parsed_text_length, 
+      Some (fun () -> for j = 1 to i do advance () done)
+  | TA.Redo (_, None) ->   [], parsed_text_length, 
+      Some (fun () -> advance ())
+  | TA.Undo (_, Some i) ->  [], parsed_text_length, 
+      Some (fun () -> for j = 1 to i do script#retract () done)
+  | TA.Undo (_, None) -> [], parsed_text_length, 
+      Some (fun () -> script#retract ()) *)
+  (* TODO *)
+  | TA.Quit _ -> failwith "not implemented"
+  | TA.Print (_,kind) -> failwith "not implemented"
+  | TA.Search_pat (_, search_kind, str) -> failwith "not implemented"
+  | TA.Search_term (_, search_kind, term) -> failwith "not implemented"
+
+                                
+let eval_executable guistuff status user_goal parsed_text script ex =
+  let module TA = GrafiteAst in
+  let module TAPp = GrafiteAstPp in
+  let module MD = MatitaDisambiguator in
+  let module ML = MatitacleanLib in
+  let parsed_text_length = String.length parsed_text in
+  match ex with
+  | TA.Command (loc, _) | TA.Tactical (loc, _) ->
+      (try 
+        (match ML.baseuri_of_baseuri_decl (TA.Executable (loc,ex)) with
+        | None -> ()
+        | Some u -> 
+            if not (MatitacleanLib.is_empty u) then
+              match 
+                guistuff.ask_confirmation 
+                  ~title:"Baseuri redefinition" 
+                  ~message:(
+                    "Baseuri " ^ u ^ " already exists.\n" ^
+                    "Do you want to redefine the corresponding "^
+                    "part of the library?")
+              with
+              | `YES -> MatitacleanLib.clean_baseuris [u]
+              | `NO -> ()
+              | `CANCEL -> raise MatitaTypes.Cancel);
+        eval_with_engine 
+          guistuff status user_goal parsed_text (TA.Executable (loc, ex))
+      with MatitaTypes.Cancel -> [], 0)
+  | TA.Macro (_,mac) ->
+      eval_macro guistuff status parsed_text script mac
+
+let rec eval_statement guistuff status user_goal script s =
+  if Pcre.pmatch ~rex:only_dust_RE s then raise Margin;
+  let st = GrafiteParser.parse_statement (Stream.of_string s) in
+  let text_of_loc loc =
+    let parsed_text_length = snd (CicNotationPt.loc_of_floc loc) in
+    let parsed_text = safe_substring s 0 parsed_text_length in
+    parsed_text, parsed_text_length
+  in
+  match st with
+  | GrafiteAst.Comment (loc,_)-> 
+      let parsed_text, parsed_text_length = text_of_loc loc in
+      let remain_len = String.length s - parsed_text_length in
+      let s = String.sub s parsed_text_length remain_len in
+      let s,len = 
+        eval_statement guistuff status user_goal script s 
+      in
+      (match s with
+      | (status, text) :: tl ->
+        ((status, parsed_text ^ text)::tl), (parsed_text_length + len)
+      | [] -> [], 0)
+  | GrafiteAst.Executable (loc, ex) ->
+      let parsed_text, parsed_text_length = text_of_loc loc in
+      eval_executable guistuff  status user_goal parsed_text script ex 
+  
+let fresh_script_id =
+  let i = ref 0 in
+  fun () -> incr i; !i
 
 class script ~(buffer: GText.buffer) ~(init: MatitaTypes.status) 
-              ~(mathviewer: MatitaTypes.mathViewer) () =
+              ~(mathviewer: MatitaTypes.mathViewer) 
+              ~set_star
+              ~ask_confirmation
+              ~urichooser 
+              ~develcreator 
+              () =
 object (self)
-  initializer self#reset ()
+  val scriptId = fresh_script_id ()
+  
+  val guistuff = {
+    mathviewer = mathviewer;
+    urichooser = urichooser;
+    ask_confirmation = ask_confirmation;
+    develcreator = develcreator;
+    filenamedata = (None, None)} 
+  
+  method private getFilename =
+    match guistuff.filenamedata with Some f,_ -> f | _ -> assert false
+    
+  method private ppFilename =
+    match guistuff.filenamedata with 
+    | Some f,_ -> f 
+    | None,_ -> sprintf ".unnamed%d.ma" scriptId
+  
+  initializer 
+    ignore(GMain.Timeout.add ~ms:300000 
+       ~callback:(fun _ -> self#_saveToBackuptFile ();true));
+    ignore(buffer#connect#modified_changed 
+       (fun _ -> if buffer#modified then 
+          set_star self#ppFilename true 
+        else 
+          set_star self#ppFilename false));
+    self#reset ();
+    self#template ()
 
   val mutable statements = [];    (** executed statements *)
   val mutable history = [ init ];
@@ -150,10 +440,10 @@ object (self)
 
   method private _advance ?statement () =
     let s = match statement with Some s -> s | None -> self#getFuture in
-    if Pcre.pmatch ~rex:blanks_RE s then raise Margin;
     MatitaLog.debug ("evaluating: " ^ first_line s ^ " ...");
     let (entries, parsed_len) = 
-      eval_statement self#status mathviewer userGoal s in
+      eval_statement guistuff self#status userGoal self s
+    in
     let (new_statuses, new_statements) = List.split entries in
 (*
 prerr_endline "evalStatement returned";
@@ -162,13 +452,17 @@ List.iter (fun s -> prerr_endline ("'" ^ s ^ "'")) new_statements;
     history <- List.rev new_statuses @ history;
     statements <- List.rev new_statements @ statements;
     let start = buffer#get_iter_at_mark (`MARK locked_mark) in
-    if statement = None then begin
-      let stop = start#copy#forward_chars parsed_len in
-      buffer#delete ~start ~stop
-    end;
     let new_text = String.concat "" new_statements in
-    buffer#insert ~iter:start new_text;
-    self#moveMark (String.length new_text);
+    if new_text <> String.sub s 0 parsed_len then
+      begin
+(*       prerr_endline ("new:" ^ new_text); *)
+(*       prerr_endline ("s:" ^ String.sub s 0 parsed_len); *)
+      let stop = start#copy#forward_chars parsed_len in
+      buffer#delete ~start ~stop;
+      buffer#insert ~iter:start new_text;
+(*       prerr_endline "AUTOMATICALLY MODIFIED!!!!!" *)
+      end;
+    self#moveMark (String.length new_text)
 
   method private _retract () =
     match statements, history with
@@ -176,23 +470,34 @@ List.iter (fun s -> prerr_endline ("'" ^ s ^ "'")) new_statements;
         MatitaSync.time_travel ~present:cur_status ~past:prev_status;
         statements <- List.tl statements;
         history <- List.tl history;
-        self#moveMark (- (String.length last_statement))
+        self#moveMark (- (String.length last_statement));
     | _ -> raise Margin
 
   method advance ?statement () =
     try
-      self#_advance ?statement ()
-    with Margin -> ()
+      self#_advance ?statement ();
+      self#notify
+    with 
+    | Margin -> self#notify
+    | exc -> self#notify; raise exc
 
-  method retract () = try self#_retract () with Margin -> ()
+  method retract () =
+    try
+      self#_retract ();
+      self#notify
+    with 
+    | Margin -> self#notify
+    | exc -> self#notify; raise exc
 
   method private getFuture =
     buffer#get_text ~start:(buffer#get_iter_at_mark (`MARK locked_mark))
       ~stop:buffer#end_iter ()
 
+      
   (** @param rel_offset relative offset from current position of locked_mark *)
   method private moveMark rel_offset =
     let mark = `MARK locked_mark in
+    let old_insert = buffer#get_iter_at_mark `INSERT in
     buffer#remove_tag locked_tag ~start:buffer#start_iter ~stop:buffer#end_iter;
     let current_mark_pos = buffer#get_iter_at_mark mark in
     let new_mark_pos =
@@ -203,7 +508,18 @@ List.iter (fun s -> prerr_endline ("'" ^ s ^ "'")) new_statements;
     in
     buffer#move_mark mark ~where:new_mark_pos;
     buffer#apply_tag locked_tag ~start:buffer#start_iter ~stop:new_mark_pos;
-    self#notify
+    buffer#move_mark `INSERT old_insert;
+    begin
+     match self#status.proof_status with
+        Incomplete_proof (_,goal) -> self#setGoal goal
+      | _ -> ()
+    end ;
+    while Glib.Main.pending () do ignore(Glib.Main.iteration false); done
+
+  method clean_dirty_lock =
+    let lock_mark_iter = buffer#get_iter_at_mark (`MARK locked_mark) in
+    buffer#remove_tag locked_tag ~start:buffer#start_iter ~stop:buffer#end_iter;
+    buffer#apply_tag locked_tag ~start:buffer#start_iter ~stop:lock_mark_iter
 
   val mutable observers = []
 
@@ -214,41 +530,84 @@ List.iter (fun s -> prerr_endline ("'" ^ s ^ "'")) new_statements;
     let status = self#status in
     List.iter (fun o -> o status) observers
 
-  method loadFrom fname =
-    buffer#set_text (MatitaMisc.input_file fname);
-    self#goto_top
-
-  method saveTo fname =
-    let oc = open_out fname in
+  method loadFromFile () =
+    buffer#set_text (MatitaMisc.input_file self#getFilename);
+    self#goto_top;
+    buffer#set_modified false
+    
+  method assignFileName file =
+    let abspath = MatitaMisc.absolute_path file in
+    let devel = MatitamakeLib.development_for_dir (Filename.dirname abspath) in
+    guistuff.filenamedata <- Some abspath, devel
+    
+  method saveToFile () =
+    let oc = open_out self#getFilename in
     output_string oc (buffer#get_text ~start:buffer#start_iter
                         ~stop:buffer#end_iter ());
-    close_out oc
-
+    close_out oc;
+    buffer#set_modified false
+  
+  method private _saveToBackuptFile () =
+    if buffer#modified then
+      begin
+        let f = self#ppFilename ^ "~" in
+        let oc = open_out f in
+        output_string oc (buffer#get_text ~start:buffer#start_iter
+                            ~stop:buffer#end_iter ());
+        close_out oc;
+        MatitaLog.debug ("backup " ^ f ^ " saved")                    
+      end
+  
   method private goto_top =
     MatitaSync.time_travel ~present:self#status ~past:init;
     statements <- [];
     history <- [ init ];
     userGoal <- ~-1;
-    self#notify;
     buffer#remove_tag locked_tag ~start:buffer#start_iter ~stop:buffer#end_iter;
     buffer#move_mark (`MARK locked_mark) ~where:buffer#start_iter
 
   method reset () =
     self#goto_top;
-    buffer#delete ~start:buffer#start_iter ~stop:buffer#end_iter
+    buffer#delete ~start:buffer#start_iter ~stop:buffer#end_iter;
+    self#notify;
+    buffer#set_modified false
+
+  method template () =
+    let template = MatitaMisc.input_file BuildTimeConf.script_template in 
+    buffer#insert ~iter:(buffer#get_iter `START) template;
+    guistuff.filenamedata <- 
+      (None,MatitamakeLib.development_for_dir (Unix.getcwd ()));
+    buffer#set_modified false;
+    set_star self#ppFilename false
 
   method goto (pos: [`Top | `Bottom | `Cursor]) () =
+    let getpos _ = buffer#get_iter_at_mark (`MARK locked_mark) in 
     match pos with
-    | `Top -> self#goto_top
+    | `Top -> self#goto_top; self#notify
     | `Bottom ->
-        (try while true do self#_advance () done with Margin -> ())
+        (try 
+          let rec dowhile pos =
+            self#_advance ();
+            if pos#compare (getpos ()) < 0 then
+              dowhile (getpos ())
+          in
+          dowhile (getpos ());
+          self#notify 
+        with 
+        | Margin -> self#notify
+        | exc -> self#notify; raise exc)
     | `Cursor ->
         let locked_iter () = buffer#get_iter_at_mark (`NAME "locked") in
         let cursor_iter () = buffer#get_iter_at_mark `INSERT in
-        let rec forward_until_cursor () = (* go forward until locked > cursor *)
-          self#_advance ();
-          if (locked_iter ())#compare (cursor_iter ()) < 0 then
-            forward_until_cursor ()
+        let forward_until_cursor () = (* go forward until locked > cursor *)
+          let rec aux oldpos =
+            self#_advance ();
+            if (locked_iter ())#compare (cursor_iter ()) < 0 &&
+               oldpos#compare (getpos ()) < 0 
+            then
+              aux (getpos ())
+          in
+          aux (getpos ())
         in
         let rec back_until_cursor () = (* go backward until locked < cursor *)
           self#_retract ();
@@ -258,13 +617,15 @@ List.iter (fun s -> prerr_endline ("'" ^ s ^ "'")) new_statements;
         let cmp = (locked_iter ())#compare (cursor_iter ()) in
         (try
           if cmp < 0 then       (* locked < cursor *)
-            forward_until_cursor ()
+            (forward_until_cursor (); self#notify)
           else if cmp > 0 then  (* locked > cursor *)
-            back_until_cursor ()
+            (back_until_cursor (); self#notify)
           else                  (* cursor = locked *)
               ()
-        with Margin -> ())
-
+        with 
+        | Margin -> self#notify
+        | exc -> self#notify; raise exc)
+              
   method onGoingProof () =
     match self#status.proof_status with
     | No_proof | Proof _ -> false
@@ -276,19 +637,47 @@ List.iter (fun s -> prerr_endline ("'" ^ s ^ "'")) new_statements;
   method proofContext = MatitaMisc.get_proof_context self#status
   method setGoal n = userGoal <- n
 
+  method eos = 
+    let s = self#getFuture in
+    let rec is_there_and_executable s = 
+      if Pcre.pmatch ~rex:only_dust_RE s then raise Margin;
+      let st = GrafiteParser.parse_statement (Stream.of_string s) in
+      match st with
+      | GrafiteAst.Comment (loc,_)-> 
+          let parsed_text_length = snd (CicNotationPt.loc_of_floc loc) in
+          let remain_len = String.length s - parsed_text_length in
+          let next = String.sub s parsed_text_length remain_len in
+          is_there_and_executable next
+      | GrafiteAst.Executable (loc, ex) -> false
+    in
+    try
+      is_there_and_executable s
+    with 
+    | CicNotationParser.Parse_error _ -> false
+    | Margin -> true
+      
+    
+    
   (* debug *)
   method dump () =
     MatitaLog.debug "script status:";
     MatitaLog.debug ("history size: " ^ string_of_int (List.length history));
     MatitaLog.debug (sprintf "%d statements:" (List.length statements));
     List.iter MatitaLog.debug statements;
+    MatitaLog.debug ("Current file name: " ^
+      (match guistuff.filenamedata with 
+      |None,_ -> "[ no name ]" 
+      | Some f,_ -> f));
 
 end
 
 let _script = ref None
 
-let script ~buffer ~init ~mathviewer () =
-  let s = new script ~buffer ~init ~mathviewer () in
+let script ~buffer ~init ~mathviewer ~urichooser ~develcreator ~ask_confirmation ~set_star ()
+=
+  let s = new script 
+    ~buffer ~init ~mathviewer ~ask_confirmation ~urichooser ~develcreator ~set_star () 
+  in
   _script := Some s;
   s