X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2FmatitaScript.ml;h=7e4dcb9fc04e4200a8c00e15a77c02af7e617a37;hb=e5014674aed0dab6f3aa43773c8caeffcfe0ac32;hp=5fa044e5330779cd68f58ce1aa1aa27ccde2f67d;hpb=8df7fb956e77d5863338587ac3fdd5f46669d331;p=helm.git

diff --git a/helm/matita/matitaScript.ml b/helm/matita/matitaScript.ml
index 5fa044e53..7e4dcb9fc 100644
--- a/helm/matita/matitaScript.ml
+++ b/helm/matita/matitaScript.ml
@@ -57,7 +57,7 @@ let prepend_text header base =
   if Pcre.pmatch ~rex:heading_nl_RE base then
     sprintf "\n%s%s" header base
   else
-    sprintf "%s\n%s" header base
+    sprintf "\n%s\n%s" header base
 
   (** creates a statement AST for the Goal tactic, e.g. "goal 7" *)
 let goal_ast n =
@@ -434,6 +434,8 @@ object (self)
     buffer#create_mark ~name:"locked" ~left_gravity:true buffer#start_iter
   val locked_tag = buffer#create_tag [`BACKGROUND "lightblue"; `EDITABLE false]
 
+  method locked_mark = locked_mark
+
     (* history can't be empty, the invariant above grant that it contains at
      * least the init status *)
   method status = match history with hd :: _ -> hd | _ -> assert false
@@ -592,34 +594,36 @@ List.iter (fun s -> prerr_endline ("'" ^ s ^ "'")) new_statements;
     set_star self#ppFilename false
 
   method goto (pos: [`Top | `Bottom | `Cursor]) () =
-    let getpos _ = buffer#get_iter_at_mark (`MARK locked_mark) in 
+    let getoffset () = (buffer#get_iter_at_mark (`MARK locked_mark))#offset in 
     match pos with
     | `Top -> self#goto_top; self#notify
     | `Bottom ->
         (try 
           let rec dowhile pos =
             self#_advance ();
-            if pos#compare (getpos ()) < 0 then
-              dowhile (getpos ())
+            let newpos = getoffset () in
+            if pos - newpos < 0 then
+              dowhile newpos
           in
-          dowhile (getpos ());
+          dowhile (getoffset ());
           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 cmp = (locked_iter ())#offset - cursor_iter#offset in
+        let locked_offset () =
+         (buffer#get_iter_at_mark (`NAME "locked"))#offset in
+        let cursor_offset () = (buffer#get_iter_at_mark `INSERT)#offset in
+        let cmp = (locked_offset ()) - cursor_offset () in
         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 
+            if (locked_offset ()) - cursor_offset () < 0 &&
+               oldpos - (getoffset ()) < 0 
             then
-              aux (getpos ())
+              aux (getoffset ())
           in
-          aux (getpos ())
+          aux (getoffset ())
         in
         let rec back_until_cursor len = (* go backward until locked < cursor *)
          function