1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding --
5 -- Terminal_Interface.Curses.Forms.Field_Types --
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: 2011/03/08 01:16:49 $
40 -- Binding Version 01.00
41 ------------------------------------------------------------------------------
42 with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
43 with Ada.Unchecked_Deallocation;
44 with Ada.Unchecked_Conversion;
46 -- |=====================================================================
47 -- | man page form_fieldtype.3x
48 -- |=====================================================================
50 package body Terminal_Interface.Curses.Forms.Field_Types is
52 use type System.Address;
54 pragma Warnings (Off);
55 function To_Argument_Access is new Ada.Unchecked_Conversion
56 (System.Address, Argument_Access);
59 function Get_Fieldtype (F : Field) return C_Field_Type;
60 pragma Import (C, Get_Fieldtype, "field_type");
62 function Get_Arg (F : Field) return System.Address;
63 pragma Import (C, Get_Arg, "field_arg");
65 -- |=====================================================================
66 -- | man page form_field_validation.3x
67 -- |=====================================================================
71 function Get_Type (Fld : Field) return Field_Type_Access
73 Low_Level : constant C_Field_Type := Get_Fieldtype (Fld);
74 Arg : Argument_Access;
76 if Low_Level = Null_Field_Type then
79 if Low_Level = M_Builtin_Router or else
80 Low_Level = M_Generic_Type or else
81 Low_Level = M_Choice_Router or else
82 Low_Level = M_Generic_Choice then
83 Arg := To_Argument_Access (Get_Arg (Fld));
95 function Copy_Arg (Usr : System.Address) return System.Address
101 procedure Free_Arg (Usr : System.Address)
103 procedure Free_Type is new Ada.Unchecked_Deallocation
104 (Field_Type'Class, Field_Type_Access);
105 procedure Freeargs is new Ada.Unchecked_Deallocation
106 (Argument, Argument_Access);
108 To_Be_Free : Argument_Access := To_Argument_Access (Usr);
109 Low_Level : C_Field_Type;
111 if To_Be_Free /= null then
112 if To_Be_Free.Usr /= System.Null_Address then
113 Low_Level := To_Be_Free.Cft;
114 if Low_Level.Freearg /= null then
115 Low_Level.Freearg (To_Be_Free.Usr);
118 if To_Be_Free.Typ /= null then
119 Free_Type (To_Be_Free.Typ);
121 Freeargs (To_Be_Free);
125 procedure Wrap_Builtin (Fld : Field;
126 Typ : Field_Type'Class;
127 Cft : C_Field_Type := C_Builtin_Router)
129 Usr_Arg : constant System.Address := Get_Arg (Fld);
130 Low_Level : constant C_Field_Type := Get_Fieldtype (Fld);
131 Arg : Argument_Access;
133 function Set_Fld_Type (F : Field := Fld;
134 Cf : C_Field_Type := Cft;
135 Arg1 : Argument_Access) return C_Int;
136 pragma Import (C, Set_Fld_Type, "set_field_type_user");
139 pragma Assert (Low_Level /= Null_Field_Type);
140 if Cft /= C_Builtin_Router and then Cft /= C_Choice_Router then
141 raise Form_Exception;
143 Arg := new Argument'(Usr => System.Null_Address,
144 Typ => new Field_Type'Class'(Typ),
145 Cft => Get_Fieldtype (Fld));
146 if Usr_Arg /= System.Null_Address then
147 if Low_Level.Copyarg /= null then
148 Arg.Usr := Low_Level.Copyarg (Usr_Arg);
154 Res := Set_Fld_Type (Arg1 => Arg);
161 function Field_Check_Router (Fld : Field;
162 Usr : System.Address) return Curses_Bool
164 Arg : constant Argument_Access := To_Argument_Access (Usr);
166 pragma Assert (Arg /= null and then Arg.Cft /= Null_Field_Type
167 and then Arg.Typ /= null);
168 if Arg.Cft.Fcheck /= null then
169 return Arg.Cft.Fcheck (Fld, Arg.Usr);
173 end Field_Check_Router;
175 function Char_Check_Router (Ch : C_Int;
176 Usr : System.Address) return Curses_Bool
178 Arg : constant Argument_Access := To_Argument_Access (Usr);
180 pragma Assert (Arg /= null and then Arg.Cft /= Null_Field_Type
181 and then Arg.Typ /= null);
182 if Arg.Cft.Ccheck /= null then
183 return Arg.Cft.Ccheck (Ch, Arg.Usr);
187 end Char_Check_Router;
189 function Next_Router (Fld : Field;
190 Usr : System.Address) return Curses_Bool
192 Arg : constant Argument_Access := To_Argument_Access (Usr);
194 pragma Assert (Arg /= null and then Arg.Cft /= Null_Field_Type
195 and then Arg.Typ /= null);
196 if Arg.Cft.Next /= null then
197 return Arg.Cft.Next (Fld, Arg.Usr);
203 function Prev_Router (Fld : Field;
204 Usr : System.Address) return Curses_Bool
206 Arg : constant Argument_Access := To_Argument_Access (Usr);
208 pragma Assert (Arg /= null and then Arg.Cft /= Null_Field_Type
209 and then Arg.Typ /= null);
210 if Arg.Cft.Prev /= null then
211 return Arg.Cft.Prev (Fld, Arg.Usr);
217 -- -----------------------------------------------------------------------
219 function C_Builtin_Router return C_Field_Type
224 if M_Builtin_Router = Null_Field_Type then
225 T := New_Fieldtype (Field_Check_Router'Access,
226 Char_Check_Router'Access);
227 if T = Null_Field_Type then
228 raise Form_Exception;
230 Res := Set_Fieldtype_Arg (T,
238 M_Builtin_Router := T;
240 pragma Assert (M_Builtin_Router /= Null_Field_Type);
241 return M_Builtin_Router;
242 end C_Builtin_Router;
244 -- -----------------------------------------------------------------------
246 function C_Choice_Router return C_Field_Type
251 if M_Choice_Router = Null_Field_Type then
252 T := New_Fieldtype (Field_Check_Router'Access,
253 Char_Check_Router'Access);
254 if T = Null_Field_Type then
255 raise Form_Exception;
257 Res := Set_Fieldtype_Arg (T,
265 Res := Set_Fieldtype_Choice (T,
272 M_Choice_Router := T;
274 pragma Assert (M_Choice_Router /= Null_Field_Type);
275 return M_Choice_Router;
278 end Terminal_Interface.Curses.Forms.Field_Types;