1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding --
5 -- Terminal_Interface.Curses.Forms.Field_Types.User --
9 ------------------------------------------------------------------------------
10 -- Copyright 2020 Thomas E. Dickey --
11 -- Copyright 1999-2011,2014 Free Software Foundation, Inc. --
13 -- Permission is hereby granted, free of charge, to any person obtaining a --
14 -- copy of this software and associated documentation files (the --
15 -- "Software"), to deal in the Software without restriction, including --
16 -- without limitation the rights to use, copy, modify, merge, publish, --
17 -- distribute, distribute with modifications, sublicense, and/or sell --
18 -- copies of the Software, and to permit persons to whom the Software is --
19 -- furnished to do so, subject to the following conditions: --
21 -- The above copyright notice and this permission notice shall be included --
22 -- in all copies or substantial portions of the Software. --
24 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
25 -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
26 -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
27 -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
28 -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
29 -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
30 -- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
32 -- Except as contained in this notice, the name(s) of the above copyright --
33 -- holders shall not be used in advertising or otherwise to promote the --
34 -- sale, use or other dealings in this Software without prior written --
36 ------------------------------------------------------------------------------
37 -- Author: Juergen Pfeifer, 1996
40 -- $Date: 2020/02/02 23:34:34 $
41 -- Binding Version 01.00
42 ------------------------------------------------------------------------------
43 with System.Address_To_Access_Conversions;
44 with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
46 package body Terminal_Interface.Curses.Forms.Field_Types.User is
48 procedure Set_Field_Type (Fld : Field;
49 Typ : User_Defined_Field_Type)
51 function Allocate_Arg (T : User_Defined_Field_Type'Class)
52 return Argument_Access;
54 function Set_Fld_Type (F : Field := Fld;
55 Cft : C_Field_Type := C_Generic_Type;
56 Arg1 : Argument_Access)
58 pragma Import (C, Set_Fld_Type, "set_field_type_user");
60 function Allocate_Arg (T : User_Defined_Field_Type'Class)
61 return Argument_Access
63 Ptr : constant Field_Type_Access
64 := new User_Defined_Field_Type'Class'(T);
66 return new Argument'(Usr => System.Null_Address,
68 Cft => Null_Field_Type);
72 Eti_Exception (Set_Fld_Type (Arg1 => Allocate_Arg (Typ)));
75 package Argument_Conversions is
76 new System.Address_To_Access_Conversions (Argument);
78 function Generic_Field_Check (Fld : Field;
79 Usr : System.Address) return Curses_Bool
82 Udf : constant User_Defined_Field_Type_Access :=
83 User_Defined_Field_Type_Access
84 (Argument_Access (Argument_Conversions.To_Pointer (Usr)).all.Typ);
86 Result := Field_Check (Fld, Udf.all);
87 return Curses_Bool (Boolean'Pos (Result));
88 end Generic_Field_Check;
90 function Generic_Char_Check (Ch : C_Int;
91 Usr : System.Address) return Curses_Bool
94 Udf : constant User_Defined_Field_Type_Access :=
95 User_Defined_Field_Type_Access
96 (Argument_Access (Argument_Conversions.To_Pointer (Usr)).all.Typ);
98 Result := Character_Check (Character'Val (Ch), Udf.all);
99 return Curses_Bool (Boolean'Pos (Result));
100 end Generic_Char_Check;
102 -- -----------------------------------------------------------------------
104 function C_Generic_Type return C_Field_Type
109 if M_Generic_Type = Null_Field_Type then
110 T := New_Fieldtype (Generic_Field_Check'Access,
111 Generic_Char_Check'Access);
112 if T = Null_Field_Type then
113 raise Form_Exception;
115 Res := Set_Fieldtype_Arg (T,
123 pragma Assert (M_Generic_Type /= Null_Field_Type);
124 return M_Generic_Type;
127 end Terminal_Interface.Curses.Forms.Field_Types.User;