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|
------------------------------------------------------------------------------
-- --
-- GNAT ncurses Binding --
-- --
-- Terminal_Interface.Curses.Forms.Field_Types --
-- --
-- B O D Y --
-- --
------------------------------------------------------------------------------
-- Copyright (c) 1998-2011,2014 Free Software Foundation, Inc. --
-- --
-- Permission is hereby granted, free of charge, to any person obtaining a --
-- copy of this software and associated documentation files (the --
-- "Software"), to deal in the Software without restriction, including --
-- without limitation the rights to use, copy, modify, merge, publish, --
-- distribute, distribute with modifications, sublicense, and/or sell --
-- copies of the Software, and to permit persons to whom the Software is --
-- furnished to do so, subject to the following conditions: --
-- --
-- The above copyright notice and this permission notice shall be included --
-- in all copies or substantial portions of the Software. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
-- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
-- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
-- --
-- Except as contained in this notice, the name(s) of the above copyright --
-- holders shall not be used in advertising or otherwise to promote the --
-- sale, use or other dealings in this Software without prior written --
-- authorization. --
------------------------------------------------------------------------------
-- Author: Juergen Pfeifer, 1996
-- Version Control:
-- $Revision: 1.28 $
-- $Date: 2014/09/13 19:00:47 $
-- Binding Version 01.00
------------------------------------------------------------------------------
with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
with Ada.Unchecked_Deallocation;
with System.Address_To_Access_Conversions;
-- |
-- |=====================================================================
-- | man page form_fieldtype.3x
-- |=====================================================================
-- |
package body Terminal_Interface.Curses.Forms.Field_Types is
use type System.Address;
package Argument_Conversions is
new System.Address_To_Access_Conversions (Argument);
function Get_Fieldtype (F : Field) return C_Field_Type;
pragma Import (C, Get_Fieldtype, "field_type");
function Get_Arg (F : Field) return System.Address;
pragma Import (C, Get_Arg, "field_arg");
-- |
-- |=====================================================================
-- | man page form_field_validation.3x
-- |=====================================================================
-- |
-- |
-- |
function Get_Type (Fld : Field) return Field_Type_Access
is
Low_Level : constant C_Field_Type := Get_Fieldtype (Fld);
Arg : Argument_Access;
begin
if Low_Level = Null_Field_Type then
return null;
else
if Low_Level = M_Builtin_Router or else
Low_Level = M_Generic_Type or else
Low_Level = M_Choice_Router or else
Low_Level = M_Generic_Choice
then
Arg := Argument_Access
(Argument_Conversions.To_Pointer (Get_Arg (Fld)));
if Arg = null then
raise Form_Exception;
else
return Arg.all.Typ;
end if;
else
raise Form_Exception;
end if;
end if;
end Get_Type;
function Copy_Arg (Usr : System.Address) return System.Address
is
begin
return Usr;
end Copy_Arg;
procedure Free_Arg (Usr : System.Address)
is
procedure Free_Type is new Ada.Unchecked_Deallocation
(Field_Type'Class, Field_Type_Access);
procedure Freeargs is new Ada.Unchecked_Deallocation
(Argument, Argument_Access);
To_Be_Free : Argument_Access
:= Argument_Access (Argument_Conversions.To_Pointer (Usr));
Low_Level : C_Field_Type;
begin
if To_Be_Free /= null then
if To_Be_Free.all.Usr /= System.Null_Address then
Low_Level := To_Be_Free.all.Cft;
if Low_Level.all.Freearg /= null then
Low_Level.all.Freearg (To_Be_Free.all.Usr);
end if;
end if;
if To_Be_Free.all.Typ /= null then
Free_Type (To_Be_Free.all.Typ);
end if;
Freeargs (To_Be_Free);
end if;
end Free_Arg;
procedure Wrap_Builtin (Fld : Field;
Typ : Field_Type'Class;
Cft : C_Field_Type := C_Builtin_Router)
is
Usr_Arg : constant System.Address := Get_Arg (Fld);
Low_Level : constant C_Field_Type := Get_Fieldtype (Fld);
Arg : Argument_Access;
function Set_Fld_Type (F : Field := Fld;
Cf : C_Field_Type := Cft;
Arg1 : Argument_Access) return Eti_Error;
pragma Import (C, Set_Fld_Type, "set_field_type_user");
begin
pragma Assert (Low_Level /= Null_Field_Type);
if Cft /= C_Builtin_Router and then Cft /= C_Choice_Router then
raise Form_Exception;
else
Arg := new Argument'(Usr => System.Null_Address,
Typ => new Field_Type'Class'(Typ),
Cft => Get_Fieldtype (Fld));
if Usr_Arg /= System.Null_Address then
if Low_Level.all.Copyarg /= null then
Arg.all.Usr := Low_Level.all.Copyarg (Usr_Arg);
else
Arg.all.Usr := Usr_Arg;
end if;
end if;
Eti_Exception (Set_Fld_Type (Arg1 => Arg));
end if;
end Wrap_Builtin;
function Field_Check_Router (Fld : Field;
Usr : System.Address) return Curses_Bool
is
Arg : constant Argument_Access
:= Argument_Access (Argument_Conversions.To_Pointer (Usr));
begin
pragma Assert (Arg /= null and then Arg.all.Cft /= Null_Field_Type
and then Arg.all.Typ /= null);
if Arg.all.Cft.all.Fcheck /= null then
return Arg.all.Cft.all.Fcheck (Fld, Arg.all.Usr);
else
return 1;
end if;
end Field_Check_Router;
function Char_Check_Router (Ch : C_Int;
Usr : System.Address) return Curses_Bool
is
Arg : constant Argument_Access
:= Argument_Access (Argument_Conversions.To_Pointer (Usr));
begin
pragma Assert (Arg /= null and then Arg.all.Cft /= Null_Field_Type
and then Arg.all.Typ /= null);
if Arg.all.Cft.all.Ccheck /= null then
return Arg.all.Cft.all.Ccheck (Ch, Arg.all.Usr);
else
return 1;
end if;
end Char_Check_Router;
function Next_Router (Fld : Field;
Usr : System.Address) return Curses_Bool
is
Arg : constant Argument_Access
:= Argument_Access (Argument_Conversions.To_Pointer (Usr));
begin
pragma Assert (Arg /= null and then Arg.all.Cft /= Null_Field_Type
and then Arg.all.Typ /= null);
if Arg.all.Cft.all.Next /= null then
return Arg.all.Cft.all.Next (Fld, Arg.all.Usr);
else
return 1;
end if;
end Next_Router;
function Prev_Router (Fld : Field;
Usr : System.Address) return Curses_Bool
is
Arg : constant Argument_Access :=
Argument_Access (Argument_Conversions.To_Pointer (Usr));
begin
pragma Assert (Arg /= null and then Arg.all.Cft /= Null_Field_Type
and then Arg.all.Typ /= null);
if Arg.all.Cft.all.Prev /= null then
return Arg.all.Cft.all.Prev (Fld, Arg.all.Usr);
else
return 1;
end if;
end Prev_Router;
-- -----------------------------------------------------------------------
--
function C_Builtin_Router return C_Field_Type
is
T : C_Field_Type;
begin
if M_Builtin_Router = Null_Field_Type then
T := New_Fieldtype (Field_Check_Router'Access,
Char_Check_Router'Access);
if T = Null_Field_Type then
raise Form_Exception;
else
Eti_Exception (Set_Fieldtype_Arg (T,
Make_Arg'Access,
Copy_Arg'Access,
Free_Arg'Access));
end if;
M_Builtin_Router := T;
end if;
pragma Assert (M_Builtin_Router /= Null_Field_Type);
return M_Builtin_Router;
end C_Builtin_Router;
-- -----------------------------------------------------------------------
--
function C_Choice_Router return C_Field_Type
is
T : C_Field_Type;
begin
if M_Choice_Router = Null_Field_Type then
T := New_Fieldtype (Field_Check_Router'Access,
Char_Check_Router'Access);
if T = Null_Field_Type then
raise Form_Exception;
else
Eti_Exception (Set_Fieldtype_Arg (T,
Make_Arg'Access,
Copy_Arg'Access,
Free_Arg'Access));
Eti_Exception (Set_Fieldtype_Choice (T,
Next_Router'Access,
Prev_Router'Access));
end if;
M_Choice_Router := T;
end if;
pragma Assert (M_Choice_Router /= Null_Field_Type);
return M_Choice_Router;
end C_Choice_Router;
end Terminal_Interface.Curses.Forms.Field_Types;
|
