+ ignore(self#main#undoMenuItem#connect#activate
+ ~callback:(fun () ->
+ (* phase 1: we save the actual status of the marks and we undo *)
+ let locked_mark = `MARK ((MatitaScript.instance ())#locked_mark) in
+ let locked_iter = source_view#buffer#get_iter_at_mark locked_mark in
+ let locked_iter_offset = locked_iter#offset in
+ let mark2 =
+ `MARK
+ (source_view#buffer#create_mark ~name:"lock_point"
+ ~left_gravity:true locked_iter) in
+ source_view#source_buffer#undo ();
+ (* phase 2: we save the cursor position and we redo, restoring
+ the previous status of all the marks *)
+ let cursor_iter = source_view#buffer#get_iter_at_mark `INSERT in
+ let mark =
+ `MARK
+ (source_view#buffer#create_mark ~name:"undo_point"
+ ~left_gravity:true cursor_iter)
+ in
+ source_view#source_buffer#redo ();
+ let mark_iter = source_view#buffer#get_iter_at_mark mark in
+ let mark2_iter = source_view#buffer#get_iter_at_mark mark2 in
+ let mark2_iter = mark2_iter#set_offset locked_iter_offset in
+ source_view#buffer#move_mark locked_mark ~where:mark2_iter;
+ source_view#buffer#delete_mark mark;
+ source_view#buffer#delete_mark mark2;
+ (* phase 3: if after the undo the cursor was in the locked area,
+ then we move it there again and we perform a goto *)
+ if mark_iter#offset < locked_iter_offset then
+ begin
+ source_view#buffer#move_mark `INSERT ~where:mark_iter;
+ source_view#buffer#move_mark `SEL_BOUND ~where:mark_iter;
+ (MatitaScript.instance ())#goto `Cursor ();
+ end;
+ (* phase 4: we perform again the undo. This time we are sure that
+ the text to undo is not locked *)
+ source_view#source_buffer#undo ();
+ source_view#misc#grab_focus ()
+ ));
+ ignore(source_view#source_buffer#connect#can_undo
+ ~callback:self#main#undoMenuItem#misc#set_sensitive);
+ ignore(self#main#redoMenuItem#connect#activate
+ ~callback:source_view#source_buffer#redo);
+ ignore(source_view#source_buffer#connect#can_redo
+ ~callback:self#main#redoMenuItem#misc#set_sensitive);
+ let clipboard =
+ let atom = Gdk.Atom.clipboard in
+ GData.clipboard atom in
+ ignore(self#main#cutMenuItem#connect#activate
+ ~callback:(fun () -> source_view#buffer#cut_clipboard clipboard));
+ ignore(self#main#copyMenuItem#connect#activate
+ ~callback:(fun () -> source_view#buffer#copy_clipboard clipboard));
+ ignore(self#main#pasteMenuItem#connect#activate
+ ~callback:(fun () ->
+ source_view#buffer#paste_clipboard clipboard;
+ (MatitaScript.instance ())#clean_dirty_lock));
+ ignore(self#main#deleteMenuItem#connect#activate
+ ~callback:(fun () -> ignore (source_view#buffer#delete_selection ())));