------------------------------------------------------------------------------
--                                                                          --
--                            Matreshka Project                             --
--                                                                          --
--         Localization, Internationalization, Globalization for Ada        --
--                                                                          --
--                        Runtime Library Component                         --
--                                                                          --
------------------------------------------------------------------------------
--                                                                          --
-- Copyright © 2009-2010, Vadim Godunko <vgodunko@gmail.com>                --
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--  $Revision: 2464 $ $Date: 2012-02-07 22:25:04 +0400 (Tue, 07 Feb 2012) $
------------------------------------------------------------------------------
private with Matreshka.Internals.Utf16;

package League.Strings.Cursors.Characters is

   pragma Preelaborate;

   type Character_Cursor is tagged private;

   procedure First
    (Self : in out Character_Cursor'Class;
     Item : in out Universal_String);

   procedure Last
    (Self : in out Character_Cursor'Class;
     Item : in out Universal_String);

   procedure Next (Self : in out Character_Cursor'Class);

   procedure Previous (Self : in out Character_Cursor'Class);

   function Has_Element (Self : Character_Cursor'Class) return Boolean;

   function Element (Self : Character_Cursor'Class)
     return Wide_Wide_Character;

private

   type Character_Cursor is new Abstract_Cursor with record
      Current : Matreshka.Internals.Utf16.Utf16_String_Index := 0;
   end record;

   overriding procedure On_Changed
    (Self          : not null access Character_Cursor;
     Changed_First : Positive;
     Removed_Last  : Natural;
     Inserted_Last : Natural);

end League.Strings.Cursors.Characters;
