release/src/router/libncurses/Ada95/src/terminal_interface-curses-forms-field_types-user.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                           GNAT ncurses Binding                           --
   4 --                                                                          --
   5 --               Terminal_Interface.Curses.Forms.Field_Types.User           --
   6 --                                                                          --
   7 --                                 S P E C                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 1998-2009,2011 Free Software Foundation, Inc.              --
  11 --                                                                          --
  12 -- Permission is hereby granted, free of charge, to any person obtaining a  --
  13 -- copy of this software and associated documentation files (the            --
  14 -- "Software"), to deal in the Software without restriction, including      --
  15 -- without limitation the rights to use, copy, modify, merge, publish,      --
  16 -- distribute, distribute with modifications, sublicense, and/or sell       --
  17 -- copies of the Software, and to permit persons to whom the Software is    --
  18 -- furnished to do so, subject to the following conditions:                 --
  19 --                                                                          --
  20 -- The above copyright notice and this permission notice shall be included  --
  21 -- in all copies or substantial portions of the Software.                   --
  22 --                                                                          --
  23 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  --
  24 -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               --
  25 -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   --
  26 -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   --
  27 -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    --
  28 -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    --
  29 -- THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               --
  30 --                                                                          --
  31 -- Except as contained in this notice, the name(s) of the above copyright   --
  32 -- holders shall not be used in advertising or otherwise to promote the     --
  33 -- sale, use or other dealings in this Software without prior written       --
  34 -- authorization.                                                           --
  35 ------------------------------------------------------------------------------
  36 --  Author:  Juergen Pfeifer, 1996
  37 --  Version Control:
  38 --  $Revision: 1.15 $
  39 --  $Date: 2011/03/19 12:27:21 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42 with Interfaces.C;
  43
  44 package Terminal_Interface.Curses.Forms.Field_Types.User is
  45    pragma Preelaborate (Terminal_Interface.Curses.Forms.Field_Types.User);
  46    subtype C_Int is Interfaces.C.int;
  47
  48    type User_Defined_Field_Type is abstract new Field_Type with null record;
  49    --  This is the root of the mechanism we use to create field types in
  50    --  Ada95. You should your own type derive from this one and implement
  51    --  the Field_Check and Character_Check functions for your own type.
  52
  53    type User_Defined_Field_Type_Access is access all
  54      User_Defined_Field_Type'Class;
  55
  56    function Field_Check
  57      (Fld : Field;
  58       Typ : User_Defined_Field_Type) return Boolean
  59       is abstract;
  60    --  If True is returned, the field is considered valid, otherwise it is
  61    --  invalid.
  62
  63    function Character_Check
  64      (Ch  : Character;
  65       Typ : User_Defined_Field_Type) return Boolean
  66       is abstract;
  67    --  If True is returned, the character is considered as valid for the
  68    --  field, otherwise as invalid.
  69
  70    procedure Set_Field_Type (Fld : Field;
  71                              Typ : User_Defined_Field_Type);
  72    --  This should work for all types derived from User_Defined_Field_Type.
  73    --  No need to reimplement it for your derived type.
  74
  75    --  +----------------------------------------------------------------------
  76    --  | Private Part.
  77    --  | Used by the Choice child package.
  78 private
  79    function C_Generic_Type   return C_Field_Type;
  80
  81    function Generic_Field_Check (Fld : Field;
  82                                  Usr : System.Address) return Curses_Bool;
  83    pragma Convention (C, Generic_Field_Check);
  84    --  This is the generic Field_Check_Function for the low-level fieldtype
  85    --  representing all the User_Defined_Field_Type derivatives. It routes
  86    --  the call to the Field_Check implementation for the type.
  87
  88    function Generic_Char_Check (Ch  : C_Int;
  89                                 Usr : System.Address) return Curses_Bool;
  90    pragma Convention (C, Generic_Char_Check);
  91    --  This is the generic Char_Check_Function for the low-level fieldtype
  92    --  representing all the User_Defined_Field_Type derivatives. It routes
  93    --  the call to the Character_Check implementation for the type.
  94
  95 end Terminal_Interface.Curses.Forms.Field_Types.User;