1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding --
5 -- Terminal_Interface.Curses.Forms.Field_Types.User --
9 ------------------------------------------------------------------------------
10 -- Copyright (c) 1998-2009,2011 Free Software Foundation, Inc. --
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: --
20 -- The above copyright notice and this permission notice shall be included --
21 -- in all copies or substantial portions of the Software. --
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. --
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 --
35 ------------------------------------------------------------------------------
36 -- Author: Juergen Pfeifer, 1996
39 -- $Date: 2011/03/23 00:44:58 $
40 -- Binding Version 01.00
41 ------------------------------------------------------------------------------
42 with System.Address_To_Access_Conversions;
43 with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
45 package body Terminal_Interface.Curses.Forms.Field_Types.User is
47 procedure Set_Field_Type (Fld : Field;
48 Typ : User_Defined_Field_Type)
50 function Allocate_Arg (T : User_Defined_Field_Type'Class)
51 return Argument_Access;
53 function Set_Fld_Type (F : Field := Fld;
54 Cft : C_Field_Type := C_Generic_Type;
55 Arg1 : Argument_Access)
57 pragma Import (C, Set_Fld_Type, "set_field_type_user");
61 function Allocate_Arg (T : User_Defined_Field_Type'Class)
62 return Argument_Access
64 Ptr : constant Field_Type_Access
65 := new User_Defined_Field_Type'Class'(T);
67 return new Argument'(Usr => System.Null_Address,
69 Cft => Null_Field_Type);
73 Res := Set_Fld_Type (Arg1 => Allocate_Arg (Typ));
79 package Argument_Conversions is
80 new System.Address_To_Access_Conversions (Argument);
82 function Generic_Field_Check (Fld : Field;
83 Usr : System.Address) return Curses_Bool
86 Udf : constant User_Defined_Field_Type_Access :=
87 User_Defined_Field_Type_Access
88 (Argument_Access (Argument_Conversions.To_Pointer (Usr)).all.Typ);
90 Result := Field_Check (Fld, Udf.all);
91 return Curses_Bool (Boolean'Pos (Result));
92 end Generic_Field_Check;
94 function Generic_Char_Check (Ch : C_Int;
95 Usr : System.Address) return Curses_Bool
98 Udf : constant User_Defined_Field_Type_Access :=
99 User_Defined_Field_Type_Access
100 (Argument_Access (Argument_Conversions.To_Pointer (Usr)).all.Typ);
102 Result := Character_Check (Character'Val (Ch), Udf.all);
103 return Curses_Bool (Boolean'Pos (Result));
104 end Generic_Char_Check;
106 -- -----------------------------------------------------------------------
108 function C_Generic_Type return C_Field_Type
113 if M_Generic_Type = Null_Field_Type then
114 T := New_Fieldtype (Generic_Field_Check'Access,
115 Generic_Char_Check'Access);
116 if T = Null_Field_Type then
117 raise Form_Exception;
119 Res := Set_Fieldtype_Arg (T,
129 pragma Assert (M_Generic_Type /= Null_Field_Type);
130 return M_Generic_Type;
133 end Terminal_Interface.Curses.Forms.Field_Types.User;