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

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                           GNAT ncurses Binding                           --
   4 --                                                                          --
   5 --          Terminal_Interface.Curses.Forms.Field_Types.User.Choice         --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 1998-2011,2014 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: 1.20 $
  39 --  $Date: 2014/05/24 21:31:05 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42 with System.Address_To_Access_Conversions;
  43 with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
  44
  45 package body Terminal_Interface.Curses.Forms.Field_Types.User.Choice is
  46
  47    package Argument_Conversions is
  48       new System.Address_To_Access_Conversions (Argument);
  49
  50    function Generic_Next (Fld : Field;
  51                           Usr : System.Address) return Curses_Bool
  52    is
  53       Result : Boolean;
  54       Udf    : constant User_Defined_Field_Type_With_Choice_Access :=
  55         User_Defined_Field_Type_With_Choice_Access
  56         (Argument_Access (Argument_Conversions.To_Pointer (Usr)).all.Typ);
  57    begin
  58       Result := Next (Fld, Udf.all);
  59       return Curses_Bool (Boolean'Pos (Result));
  60    end Generic_Next;
  61
  62    function Generic_Prev (Fld : Field;
  63                           Usr : System.Address) return Curses_Bool
  64    is
  65       Result : Boolean;
  66       Udf    : constant User_Defined_Field_Type_With_Choice_Access :=
  67         User_Defined_Field_Type_With_Choice_Access
  68         (Argument_Access (Argument_Conversions.To_Pointer (Usr)).all.Typ);
  69    begin
  70       Result := Previous (Fld, Udf.all);
  71       return Curses_Bool (Boolean'Pos (Result));
  72    end Generic_Prev;
  73
  74    --  -----------------------------------------------------------------------
  75    --
  76    function C_Generic_Choice return C_Field_Type
  77    is
  78       Res : Eti_Error;
  79       T   : C_Field_Type;
  80    begin
  81       if M_Generic_Choice = Null_Field_Type then
  82          T := New_Fieldtype (Generic_Field_Check'Access,
  83                              Generic_Char_Check'Access);
  84          if T = Null_Field_Type then
  85             raise Form_Exception;
  86          else
  87             Res := Set_Fieldtype_Arg (T,
  88                                       Make_Arg'Access,
  89                                       Copy_Arg'Access,
  90                                       Free_Arg'Access);
  91             Eti_Exception (Res);
  92
  93             Res := Set_Fieldtype_Choice (T,
  94                                          Generic_Next'Access,
  95                                          Generic_Prev'Access);
  96             Eti_Exception (Res);
  97          end if;
  98          M_Generic_Choice := T;
  99       end if;
 100       pragma Assert (M_Generic_Choice /= Null_Field_Type);
 101       return M_Generic_Choice;
 102    end C_Generic_Choice;
 103
 104 end Terminal_Interface.Curses.Forms.Field_Types.User.Choice;