better handling of script names

[helm.git] / helm / matita / matitaScript.ml

diff --git a/helm/matita/matitaScript.ml b/helm/matita/matitaScript.ml
index 043fc31e43d45825f621dd485494645751b687f6..bd526212e45f9d7f88988f2ccb88341512dd9d5b 100644 (file)
--- a/helm/matita/matitaScript.ml
+++ b/helm/matita/matitaScript.ml
@@ -288,23 +288,31 @@ user_goal script s =
       eval_executable 
         status mathviewer urichooser 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) 
               ~set_star
               ~urichooser () =
-let std_filename = "unNamed.ma" in
 object (self)
-  val mutable filename = std_filename
+  val mutable filename = None
+  val scriptId = fresh_script_id ()
+  method private getFilename =
+    match filename with Some f -> f | _ -> assert false
+  method private ppFilename =
+    match filename with Some f -> f | None -> sprintf ".unnamed%d.ma" scriptId
   
   initializer 
-    ignore(GMain.Timeout.add ~ms:20000 
+    ignore(GMain.Timeout.add ~ms:30000 
        ~callback:(fun _ -> self#_saveToBackuptFile ();true));
+    set_star self#ppFilename false;
     ignore(buffer#connect#modified_changed 
        (fun _ -> if buffer#modified then 
-          set_star filename true 
+          set_star self#ppFilename true 
         else 
-          set_star filename false));
+          set_star self#ppFilename false));
     self#reset ()
 
   val mutable statements = [];    (** executed statements *)
@@ -399,27 +407,30 @@ List.iter (fun s -> prerr_endline ("'" ^ s ^ "'")) new_statements;
     List.iter (fun o -> o status) observers
 
   method loadFromFile () =
-    buffer#set_text (MatitaMisc.input_file filename);
+    buffer#set_text (MatitaMisc.input_file self#getFilename);
     self#goto_top;
     buffer#set_modified false
     
   method assignFileName file =
-    filename <- file;
+    filename <- Some file;
     
   method saveToFile () =
-    let oc = open_out filename in
+    let oc = open_out self#getFilename in
     output_string oc (buffer#get_text ~start:buffer#start_iter
                         ~stop:buffer#end_iter ());
     close_out oc;
     buffer#set_modified false
   
   method private _saveToBackuptFile () =
-    let f = filename ^ "~" 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 file " ^ f ^ " saved")
+    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;
@@ -479,7 +490,8 @@ List.iter (fun s -> prerr_endline ("'" ^ s ^ "'")) new_statements;
     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: " ^ filename);
+    MatitaLog.debug ("Current file name: " ^
+      (match filename with None -> "[ no name ]" | Some f -> f));
 
 end