terminal_interface-curses-text_io-aux.adb

# File : terminal_interface-curses-text_io-aux.adb

    ------------------------------------------------------------------------------
    --                                                                          --
    --                           GNAT ncurses Binding                           --
    --                                                                          --
    --                   Terminal_Interface.Curses.Text_IO.Aux                  --
    --                                                                          --
    --                                 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: 1.13 @
    --  @Date: 2009/12/26 17:38:58 @
    --  Binding Version 01.00
    ------------------------------------------------------------------------------
    package body Terminal_Interface.Curses.Text_IO.Aux is

       procedure Put_Buf
         (Win    : Window;
          Buf    : String;
          Width  : Field;
          Signal : Boolean := True;
          Ljust  : Boolean := False)
       is
          L   : Field;
          Len : Field;
          W   : Field := Width;
          LC  : Line_Count;
          CC  : Column_Count;
          Y   : Line_Position;
          X   : Column_Position;

          procedure Output (From, To : Field);

          procedure Output (From, To : Field)
          is
          begin
             if Len > 0 then
                if W = 0 then
                   W := Len;
                end if;
                if Len > W then
                   --  LRM A10.6 (7) says this
                   W := Len;
                end if;

                pragma Assert (Len <= W);
                Get_Size (Win, LC, CC);
                if Column_Count (Len) > CC then
                   if Signal then
                      raise Layout_Error;
                   else
                      return;
                   end if;
                else
                   if Len < W and then not Ljust then
                      declare
                         Filler : constant String (1 .. (W - Len))
                           := (others => ' ');
                      begin
                         Put (Win, Filler);
                      end;
                   end if;
                   Get_Cursor_Position (Win, Y, X);
                   if (X + Column_Position (Len)) > CC then
                      New_Line (Win);
                   end if;
                   Put (Win, Buf (From .. To));
                   if Len < W and then Ljust then
                      declare
                         Filler : constant String (1 .. (W - Len))
                           := (others => ' ');
                      begin
                         Put (Win, Filler);
                      end;
                   end if;
                end if;
             end if;
          end Output;

       begin
          pragma Assert (Win /= Null_Window);
          if Ljust then
             L := 1;
             for I in 1 .. Buf'Length loop
                exit when Buf (L) = ' ';
                L := L + 1;
             end loop;
             Len := L - 1;
             Output (1, Len);
          else  -- input buffer is not left justified
             L := Buf'Length;
             for I in 1 .. Buf'Length loop
                exit when Buf (L) = ' ';
                L := L - 1;
             end loop;
             Len := Buf'Length - L;
             Output (L + 1, Buf'Length);
          end if;
       end Put_Buf;

    end Terminal_Interface.Curses.Text_IO.Aux;