+ (match s with
+ | (status, text) :: tl ->
+ ((status, parsed_text ^ text)::tl), (parsed_text_length + len), act
+ | [] -> [], 0, None)
+ | TacticAst.Executable (loc, ex) ->
+ let parsed_text, parsed_text_length = text_of_loc loc in
+ eval_executable
+ status mathviewer urichooser user_goal parsed_text script ex
+
+
+class script ~(buffer: GText.buffer) ~(init: MatitaTypes.status)
+ ~(mathviewer: MatitaTypes.mathViewer)
+ ~urichooser () =
+object (self)
+ initializer self#reset ()
+
+ val mutable statements = []; (** executed statements *)
+ val mutable history = [ init ];
+ (** list of states before having executed statements. Head element of this
+ * list is the current state, last element is the state at the beginning of
+ * the script.
+ * Invariant: this list length is 1 + length of statements *)
+
+ (** goal as seen by the user (i.e. metano corresponding to current tab) *)
+ val mutable userGoal = ~-1
+
+ (** text mark and tag representing locked part of a script *)
+ val locked_mark =
+ buffer#create_mark ~name:"locked" ~left_gravity:true buffer#start_iter
+ val locked_tag = buffer#create_tag [`BACKGROUND "lightblue"; `EDITABLE false]
+
+ (* 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
+
+ method private _advance ?statement () =
+ let s = match statement with Some s -> s | None -> self#getFuture in
+ MatitaLog.debug ("evaluating: " ^ first_line s ^ " ...");
+ let (entries, parsed_len, post_advance_action) =
+ eval_statement self#status mathviewer urichooser userGoal self s in
+ let (new_statuses, new_statements) = List.split entries in
+(*
+prerr_endline "evalStatement returned";
+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);
+ match post_advance_action with
+ | Some f -> f ()
+ | _ -> ()
+
+ method private _retract () =
+ match statements, history with
+ | last_statement :: _, cur_status :: prev_status :: _ ->
+ MatitaSync.time_travel ~present:cur_status ~past:prev_status;
+ statements <- List.tl statements;
+ history <- List.tl history;
+ self#moveMark (- (String.length last_statement));
+ | _ -> raise Margin
+
+ method advance ?statement () =
+ try
+ self#_advance ?statement ()
+ with Margin -> ()
+
+ method retract () = try self#_retract () with Margin -> ()
+
+ 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 =
+ match rel_offset with
+ | 0 -> current_mark_pos
+ | n when n > 0 -> current_mark_pos#forward_chars n
+ | n (* when n < 0 *) -> current_mark_pos#backward_chars (abs n)
+ in
+ buffer#move_mark mark ~where:new_mark_pos;
+ buffer#apply_tag locked_tag ~start:buffer#start_iter ~stop:new_mark_pos;
+ buffer#move_mark `INSERT old_insert;
+ self#notify
+
+ val mutable observers = []
+
+ method addObserver (o: MatitaTypes.status -> unit) =
+ observers <- o :: observers
+
+ method private notify =
+ 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
+ output_string oc (buffer#get_text ~start:buffer#start_iter
+ ~stop:buffer#end_iter ());
+ close_out oc
+
+ 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
+
+ method goto (pos: [`Top | `Bottom | `Cursor]) () =
+ match pos with
+ | `Top -> self#goto_top
+ | `Bottom ->
+ (try while true do self#_advance () done with Margin -> ())
+ | `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 ()
+ in
+ let rec back_until_cursor () = (* go backward until locked < cursor *)
+ self#_retract ();
+ if (locked_iter ())#compare (cursor_iter ()) > 0 then
+ back_until_cursor ()
+ in
+ let cmp = (locked_iter ())#compare (cursor_iter ()) in
+ (try
+ if cmp < 0 then (* locked < cursor *)
+ forward_until_cursor ()
+ else if cmp > 0 then (* locked > cursor *)
+ back_until_cursor ()
+ else (* cursor = locked *)
+ ()
+ with Margin -> ())
+
+ method onGoingProof () =
+ match self#status.proof_status with
+ | No_proof | Proof _ -> false
+ | Incomplete_proof _ -> true
+ | Intermediate _ -> assert false
+
+ method proofStatus = MatitaMisc.get_proof_status self#status
+ method proofMetasenv = MatitaMisc.get_proof_metasenv self#status
+ method proofContext = MatitaMisc.get_proof_context self#status
+ method setGoal n = userGoal <- n
+
+ (* 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;
+
+end
+
+let _script = ref None
+
+let script ~buffer ~init ~mathviewer ~urichooser () =
+ let s = new script ~buffer ~init ~mathviewer ~urichooser () in
+ _script := Some s;
+ s
+
+let instance () = match !_script with None -> assert false | Some s -> s
+