File : terminal_interface-curses-text_io.adb
------------------------------------------------------------------------------
-- --
-- GNAT ncurses Binding --
-- --
-- Terminal_Interface.Curses.Text_IO --
-- --
-- B O D Y --
-- --
------------------------------------------------------------------------------
-- Copyright (c) 1998-2006,2009 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: 1.19 @
-- @Date: 2009/12/26 17:40:46 @
-- Binding Version 01.00
------------------------------------------------------------------------------
package body Terminal_Interface.Curses.Text_IO is
Default_Window : Window := Null_Window;
procedure Set_Window (Win : Window)
is
begin
Default_Window := Win;
end Set_Window;
function Get_Window return Window
is
begin
if Default_Window = Null_Window then
return Standard_Window;
else
return Default_Window;
end if;
end Get_Window;
pragma Inline (Get_Window);
procedure Flush (Win : Window)
is
begin
Refresh (Win);
end Flush;
procedure Flush
is
begin
Flush (Get_Window);
end Flush;
--------------------------------------------
-- Specification of line and page lengths --
--------------------------------------------
-- There are no set routines in this package. I assume, that you allocate
-- the window with an appropriate size.
-- A scroll-window is interpreted as an page with unbounded page length,
-- i.e. it returns the conventional 0 as page length.
function Line_Length (Win : Window) return Count
is
N_Lines : Line_Count;
N_Cols : Column_Count;
begin
Get_Size (Win, N_Lines, N_Cols);
-- if Natural (N_Cols) > Natural (Count'Last) then
-- raise Layout_Error;
-- end if;
return Count (N_Cols);
end Line_Length;
function Line_Length return Count
is
begin
return Line_Length (Get_Window);
end Line_Length;
function Page_Length (Win : Window) return Count
is
N_Lines : Line_Count;
N_Cols : Column_Count;
begin
if Scrolling_Allowed (Win) then
return 0;
else
Get_Size (Win, N_Lines, N_Cols);
-- if Natural (N_Lines) > Natural (Count'Last) then
-- raise Layout_Error;
-- end if;
return Count (N_Lines);
end if;
end Page_Length;
function Page_Length return Count
is
begin
return Page_Length (Get_Window);
end Page_Length;
------------------------------------
-- Column, Line, and Page Control --
------------------------------------
procedure New_Line (Win : Window; Spacing : Positive_Count := 1)
is
P_Size : constant Count := Page_Length (Win);
begin
if not Spacing'Valid then
raise Constraint_Error;
end if;
for I in 1 .. Spacing loop
if P_Size > 0 and then Line (Win) >= P_Size then
New_Page (Win);
else
Add (Win, ASCII.LF);
end if;
end loop;
end New_Line;
procedure New_Line (Spacing : Positive_Count := 1)
is
begin
New_Line (Get_Window, Spacing);
end New_Line;
procedure New_Page (Win : Window)
is
begin
Clear (Win);
end New_Page;
procedure New_Page
is
begin
New_Page (Get_Window);
end New_Page;
procedure Set_Col (Win : Window; To : Positive_Count)
is
Y : Line_Position;
X1 : Column_Position;
X2 : Column_Position;
N : Natural;
begin
if not To'Valid then
raise Constraint_Error;
end if;
Get_Cursor_Position (Win, Y, X1);
N := Natural (To); N := N - 1;
X2 := Column_Position (N);
if X1 > X2 then
New_Line (Win, 1);
X1 := 0;
end if;
if X1 < X2 then
declare
Filler : constant String (Integer (X1) .. (Integer (X2) - 1))
:= (others => ' ');
begin
Put (Win, Filler);
end;
end if;
end Set_Col;
procedure Set_Col (To : Positive_Count)
is
begin
Set_Col (Get_Window, To);
end Set_Col;
procedure Set_Line (Win : Window; To : Positive_Count)
is
Y1 : Line_Position;
Y2 : Line_Position;
X : Column_Position;
N : Natural;
begin
if not To'Valid then
raise Constraint_Error;
end if;
Get_Cursor_Position (Win, Y1, X);
N := Natural (To); N := N - 1;
Y2 := Line_Position (N);
if Y2 < Y1 then
New_Page (Win);
Y1 := 0;
end if;
if Y1 < Y2 then
New_Line (Win, Positive_Count (Y2 - Y1));
end if;
end Set_Line;
procedure Set_Line (To : Positive_Count)
is
begin
Set_Line (Get_Window, To);
end Set_Line;
function Col (Win : Window) return Positive_Count
is
Y : Line_Position;
X : Column_Position;
N : Natural;
begin
Get_Cursor_Position (Win, Y, X);
N := Natural (X); N := N + 1;
-- if N > Natural (Count'Last) then
-- raise Layout_Error;
-- end if;
return Positive_Count (N);
end Col;
function Col return Positive_Count
is
begin
return Col (Get_Window);
end Col;
function Line (Win : Window) return Positive_Count
is
Y : Line_Position;
X : Column_Position;
N : Natural;
begin
Get_Cursor_Position (Win, Y, X);
N := Natural (Y); N := N + 1;
-- if N > Natural (Count'Last) then
-- raise Layout_Error;
-- end if;
return Positive_Count (N);
end Line;
function Line return Positive_Count
is
begin
return Line (Get_Window);
end Line;
-----------------------
-- Characters Output --
-----------------------
procedure Put (Win : Window; Item : Character)
is
P_Size : constant Count := Page_Length (Win);
Y : Line_Position;
X : Column_Position;
L : Line_Count;
C : Column_Count;
begin
if P_Size > 0 then
Get_Cursor_Position (Win, Y, X);
Get_Size (Win, L, C);
if (Y + 1) = L and then (X + 1) = C then
New_Page (Win);
end if;
end if;
Add (Win, Item);
end Put;
procedure Put (Item : Character)
is
begin
Put (Get_Window, Item);
end Put;
--------------------
-- Strings-Output --
--------------------
procedure Put (Win : Window; Item : String)
is
P_Size : constant Count := Page_Length (Win);
Y : Line_Position;
X : Column_Position;
L : Line_Count;
C : Column_Count;
begin
if P_Size > 0 then
Get_Cursor_Position (Win, Y, X);
Get_Size (Win, L, C);
if (Y + 1) = L and then (X + 1 + Item'Length) >= C then
New_Page (Win);
end if;
end if;
Add (Win, Item);
end Put;
procedure Put (Item : String)
is
begin
Put (Get_Window, Item);
end Put;
procedure Put_Line
(Win : Window;
Item : String)
is
begin
Put (Win, Item);
New_Line (Win, 1);
end Put_Line;
procedure Put_Line
(Item : String)
is
begin
Put_Line (Get_Window, Item);
end Put_Line;
end Terminal_Interface.Curses.Text_IO;