/usr/share/ada/adainclude/gnatcoll/gnatcoll-terminal.adb is in libgnatcoll16.1.0-dev 17.0.2017-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- G N A T C O L L --
-- --
-- Copyright (C) 2005-2017, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
with Ada.Text_IO; use Ada.Text_IO;
with GNAT.OS_Lib; use GNAT.OS_Lib;
package body GNATCOLL.Terminal is
On_Windows : constant Boolean := GNAT.OS_Lib.Directory_Separator = '\';
Color_To_Win32 : constant array (ANSI_Color) of Integer :=
(Unchanged => -1,
Black => 0,
Red => 4,
Green => 2,
Yellow => 6,
Blue => 1,
Magenta => 5,
Cyan => 3,
Grey => 7,
Reset => -1);
Style_To_Win32 : constant array (ANSI_Style) of Integer :=
(Unchanged => -1,
Bright => 16#08#,
Dim => 16#00#, -- same as Normal
Normal => 16#00#,
Reset_All => -1);
procedure Win_Set_Console
(Self : Terminal_Info'Class;
Attrs : Integer);
-- Windows-specific implementation to change the attributes of the console
procedure Decode_Windows_Attributes
(Self : in out Terminal_Info'Class;
Attrs : Integer);
-- Decode the value of the attributes returned by Windows, into the
-- default parameters for the terminal.
procedure Auto_Detect_Colors
(Self : in out Terminal_Info'Class;
Support : Supports_Color);
-- Auto-detect whether colors are supported
function getConsoleScreenBufferInfo (Stderr : Integer) return Integer;
pragma Import (C, getConsoleScreenBufferInfo,
"gnatcoll_get_console_screen_buffer_info");
function terminal_has_colors (Fd : File_Descriptor) return Integer;
pragma Import (C, terminal_has_colors, "gnatcoll_terminal_has_colors");
-- Whether Fd is a terminal that supports color output
-------------------------------
-- Decode_Windows_Attributes --
-------------------------------
procedure Decode_Windows_Attributes
(Self : in out Terminal_Info'Class;
Attrs : Integer)
is
type Mod_32 is mod 2 ** 32;
A : Mod_32;
begin
Self.Default_Fore := Black;
Self.Default_Back := Grey;
Self.Default_Style := Normal;
if not On_Windows then
return;
elsif Attrs = -1 then
Self.Colors := Unsupported;
else
A := Mod_32 (Attrs);
case A and 7 is
when 0 => Self.Default_Fore := Black;
when 1 => Self.Default_Fore := Blue;
when 2 => Self.Default_Fore := Green;
when 3 => Self.Default_Fore := Cyan;
when 4 => Self.Default_Fore := Red;
when 5 => Self.Default_Fore := Magenta;
when 6 => Self.Default_Fore := Yellow;
when others => Self.Default_Fore := Grey;
end case;
case (A / 16) and 7 is
when 0 => Self.Default_Back := Black;
when 1 => Self.Default_Back := Blue;
when 2 => Self.Default_Back := Green;
when 3 => Self.Default_Back := Cyan;
when 4 => Self.Default_Back := Red;
when 5 => Self.Default_Back := Magenta;
when 6 => Self.Default_Back := Yellow;
when others => Self.Default_Back := Grey;
end case;
if (A and 16#08#) /= 0 then
Self.Default_Style := Bright;
else
Self.Default_Style := Normal;
end if;
end if;
end Decode_Windows_Attributes;
------------------------
-- Auto_Detect_Colors --
------------------------
procedure Auto_Detect_Colors
(Self : in out Terminal_Info'Class;
Support : Supports_Color)
is
Env : String_Access;
begin
case Support is
when No =>
Self.Colors := Unsupported;
when Yes =>
if On_Windows then
Env := Getenv ("ANSICON");
if Env = null or else Env.all = "" then
Self.Colors := WIN32_Sequences;
else
Self.Colors := ANSI_Sequences;
end if;
Free (Env);
else
Self.Colors := ANSI_Sequences;
end if;
when Auto =>
if On_Windows then
-- This procedure is only called for stdout or stderr
Env := Getenv ("ANSICON");
if Env = null or else Env.all = "" then
Self.Colors := WIN32_Sequences;
else
Self.Colors := ANSI_Sequences;
end if;
Free (Env);
else
if Self.FD = Stdout
and then terminal_has_colors (Standout) /= 0
then
Self.Colors := ANSI_Sequences;
elsif Self.FD = Stderr
and then terminal_has_colors (Standerr) /= 0
then
Self.Colors := ANSI_Sequences;
else
Self.Colors := Unsupported;
end if;
end if;
end case;
end Auto_Detect_Colors;
---------------------
-- Init_For_Stdout --
---------------------
procedure Init_For_Stdout
(Self : in out Terminal_Info;
Colors : Supports_Color := Auto)
is
begin
Self.FD := Stdout;
Auto_Detect_Colors (Self, Colors);
Decode_Windows_Attributes
(Self, getConsoleScreenBufferInfo (Stderr => 0));
end Init_For_Stdout;
---------------------
-- Init_For_Stderr --
---------------------
procedure Init_For_Stderr
(Self : in out Terminal_Info;
Colors : Supports_Color := Auto)
is
begin
Self.FD := Stderr;
Auto_Detect_Colors (Self, Colors);
Decode_Windows_Attributes
(Self, getConsoleScreenBufferInfo (Stderr => 1));
end Init_For_Stderr;
-------------------
-- Init_For_File --
-------------------
procedure Init_For_File
(Self : in out Terminal_Info;
Colors : Supports_Color := Auto)
is
begin
Self.FD := File;
case Colors is
when Yes =>
-- Have to use ANSI sequences, since WIN32 sequences call
-- subprograms on the terminal itself.
Self.Colors := ANSI_Sequences;
when No | Auto =>
Self.Colors := Unsupported;
end case;
end Init_For_File;
----------------
-- Has_Colors --
----------------
function Has_Colors (Self : Terminal_Info) return Boolean is
begin
return Self.Colors /= Unsupported;
end Has_Colors;
---------------------
-- Win_Set_Console --
---------------------
procedure Win_Set_Console
(Self : Terminal_Info'Class;
Attrs : Integer)
is
procedure Set_Console_Text_Attribute (Stderr : Integer; Attrs : Integer);
pragma Import (C, Set_Console_Text_Attribute,
"gnatcoll_set_console_text_attribute");
begin
Set_Console_Text_Attribute (Boolean'Pos (Self.FD = Stderr), Attrs);
end Win_Set_Console;
------------
-- Set_Fg --
------------
procedure Set_Fg
(Self : in out Terminal_Info;
Color : ANSI_Color;
Term : Ada.Text_IO.File_Type := Ada.Text_IO.Standard_Output)
is
begin
Set_Color (Self, Term, Color, Unchanged, Unchanged);
end Set_Fg;
------------
-- Set_Bg --
------------
procedure Set_Bg
(Self : in out Terminal_Info;
Color : ANSI_Color;
Term : Ada.Text_IO.File_Type := Ada.Text_IO.Standard_Output)
is
begin
Set_Color (Self, Term, Unchanged, Color, Unchanged);
end Set_Bg;
---------------
-- Set_Style --
---------------
procedure Set_Style
(Self : in out Terminal_Info;
Style : ANSI_Style;
Term : Ada.Text_IO.File_Type := Ada.Text_IO.Standard_Output)
is
begin
Set_Color (Self, Term, Unchanged, Unchanged, Style);
end Set_Style;
---------------
-- Set_Color --
---------------
procedure Set_Color
(Self : in out Terminal_Info;
Term : Ada.Text_IO.File_Type := Ada.Text_IO.Standard_Output;
Foreground : ANSI_Color := Unchanged;
Background : ANSI_Color := Unchanged;
Style : ANSI_Style := Unchanged)
is
Attrs : Integer := 0;
begin
case Self.Colors is
when Unsupported =>
null;
when ANSI_Sequences =>
case Style is
when Unchanged => null;
when Bright => Put (Term, ASCII.ESC & "[1m");
when Dim => Put (Term, ASCII.ESC & "[2m");
when Normal => Put (Term, ASCII.ESC & "[22m");
when Reset_All => Put (Term, ASCII.ESC & "[0m");
end case;
case Foreground is
when Unchanged => null;
when Black => Put (Term, ASCII.ESC & "[30m");
when Red => Put (Term, ASCII.ESC & "[31m");
when Green => Put (Term, ASCII.ESC & "[32m");
when Yellow => Put (Term, ASCII.ESC & "[33m");
when Blue => Put (Term, ASCII.ESC & "[34m");
when Magenta => Put (Term, ASCII.ESC & "[35m");
when Cyan => Put (Term, ASCII.ESC & "[36m");
when Grey => Put (Term, ASCII.ESC & "[37m");
when Reset => Put (Term, ASCII.ESC & "[39m");
end case;
case Background is
when Unchanged => null;
when Black => Put (Term, ASCII.ESC & "[40m");
when Red => Put (Term, ASCII.ESC & "[41m");
when Green => Put (Term, ASCII.ESC & "[42m");
when Yellow => Put (Term, ASCII.ESC & "[43m");
when Blue => Put (Term, ASCII.ESC & "[44m");
when Magenta => Put (Term, ASCII.ESC & "[45m");
when Cyan => Put (Term, ASCII.ESC & "[46m");
when Grey => Put (Term, ASCII.ESC & "[47m");
when Reset => Put (Term, ASCII.ESC & "[49m");
end case;
when WIN32_Sequences =>
if Style = Reset_All then
Self.Style := Self.Default_Style;
Self.Fore := Self.Default_Fore;
Self.Back := Self.Default_Back;
elsif Style /= Unchanged then
Self.Style := Style;
end if;
if Foreground = Reset then
Self.Fore := Self.Default_Fore;
elsif Foreground /= Unchanged then
Self.Fore := Foreground;
end if;
if Background = Reset then
Self.Back := Self.Default_Back;
elsif Background /= Unchanged then
Self.Back := Background;
end if;
Attrs := Attrs + Style_To_Win32 (Self.Style) +
Color_To_Win32 (Self.Fore) +
Color_To_Win32 (Self.Back) * 16;
Win_Set_Console (Self, Attrs);
end case;
end Set_Color;
-----------------------
-- Beginning_Of_Line --
-----------------------
procedure Beginning_Of_Line (Self : in out Terminal_Info) is
procedure Internal (Stderr : Integer);
pragma Import (C, Internal, "gnatcoll_beginning_of_line");
begin
if Self.FD = File or else Self.Colors = Unsupported then
null;
else
Internal (Boolean'Pos (Self.FD = Stderr));
end if;
end Beginning_Of_Line;
--------------------------
-- Clear_To_End_Of_Line --
--------------------------
procedure Clear_To_End_Of_Line (Self : in out Terminal_Info) is
procedure Internal (Stderr : Integer);
pragma Import (C, Internal, "gnatcoll_clear_to_end_of_line");
begin
if Self.FD = File or else Self.Colors = Unsupported then
null;
else
Internal (Boolean'Pos (Self.FD = Stderr));
end if;
end Clear_To_End_Of_Line;
---------------
-- Get_Width --
---------------
function Get_Width (Self : Terminal_Info) return Integer is
function Internal (Stderr : Integer) return Integer;
pragma Import (C, Internal, "gnatcoll_terminal_width");
begin
if Self.FD = File or else Self.Colors = Unsupported then
return -1;
else
return Internal (Boolean'Pos (Self.FD = Stderr));
end if;
end Get_Width;
end GNATCOLL.Terminal;
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