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243 | -------------------------------------------------------------------------------
-- Copyright 2021, The Trendy Terminal Developers (see AUTHORS file)
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
-- http://www.apache.org/licenses/LICENSE-2.0
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
-------------------------------------------------------------------------------
with Ada.Characters.Latin_1;
with Ada.Text_IO;
with Ada.Unchecked_Conversion;
with Interfaces.C.Strings;
with Trendy_Terminal.VT100;
with Trendy_Terminal.Windows;
package body Trendy_Terminal.Platform is
package Win renames Trendy_Terminal.Windows;
use all type ASU.Unbounded_String;
use type Win.BOOL;
use type Win.HANDLE;
---------------------------------------------------------------------------
-- Original settings
---------------------------------------------------------------------------
Input_Settings, Output_Settings, Error_Settings : Win.DWORD;
Original_Input_CP, Original_Output_CP : Win.UINT;
type Input_Stream is record
Handle : Win.HANDLE := Win.INVALID_HANDLE_VALUE;
Settings : Win.Console_Input_Mode := Win.To_Console_Input_Mode (0);
end record;
type Output_Stream is record
Handle : Win.HANDLE := Win.INVALID_HANDLE_VALUE;
Settings : Win.Console_Output_Mode := Win.To_Console_Output_Mode (0);
end record;
---------------------------------------------------------------------------
-- The triad of I/O streams.
---------------------------------------------------------------------------
Std_Input : Input_Stream;
Std_Output, Std_Error : Output_Stream;
---------------------------------------------------------------------------
-- Output
---------------------------------------------------------------------------
procedure Put (H : Win.Handle; C : Character) is
S : constant String := (1 => C);
Native : aliased Interfaces.C.Strings.chars_ptr := Interfaces.C.Strings.New_String(S);
Written : aliased Win.DWORD;
begin
if Win.WriteConsoleA (H, Win.LPCVOID(Native), S'Length, Written'Unchecked_Access, 0) = 0 then
null;
end if;
Interfaces.C.Strings.Free(Native);
end Put;
procedure Put(C : Character) is
begin
Put (Std_Output.Handle, C);
end Put;
procedure Put(S : String) is
Native : aliased Interfaces.C.Strings.chars_ptr := Interfaces.C.Strings.New_String(S);
Written : aliased Win.DWORD;
begin
if Win.WriteConsoleA (Std_Output.Handle, Win.LPCVOID(Native), S'Length, Written'Unchecked_Access, 0) = 0 then
null;
end if;
Interfaces.C.Strings.Free(Native);
end Put;
---------------------------------------------------------------------------
-- Start and Shutdown
---------------------------------------------------------------------------
function Load_Std_Settings return Boolean is
Input_DWORD, Output_DWORD, Error_DWORD : aliased Win.DWORD;
begin
if Win.GetConsoleMode (Std_Input.Handle, Input_DWORD'Unchecked_Access) = 0 then
return False;
end if;
if Win.GetConsoleMode (Std_Output.Handle, Output_DWORD'Unchecked_Access) = 0 then
return False;
end if;
if Win.GetConsoleMode (Std_Error.Handle, Error_DWORD'Unchecked_Access) = 0 then
return False;
end if;
Std_Input.Settings := Win.To_Console_Input_Mode (Input_DWORD);
Std_Output.Settings := Win.To_Console_Output_Mode (Output_DWORD);
Std_Error.Settings := Win.To_Console_Output_Mode (Error_DWORD);
return True;
end Load_Std_Settings;
function Enable_UTF8 return Boolean is
begin
return Win.SetConsoleCP (Win.CP_UTF8) /= 0 and then Win.SetConsoleOutputCP (Win.CP_UTF8) /= 0;
end Enable_UTF8;
function Init return Boolean is
begin
Std_Output.Handle := Win.GetStdHandle (Win.STD_OUTPUT_HANDLE);
Std_Input.Handle := Win.GetStdHandle (Win.STD_INPUT_HANDLE);
Std_Error.Handle := Win.GetStdHandle (Win.STD_ERROR_HANDLE);
if Std_Output.Handle = Win.INVALID_HANDLE_VALUE or else Std_Input.Handle = Win.INVALID_HANDLE_VALUE
or else Std_Error.Handle = Win.INVALID_HANDLE_VALUE then
Ada.Text_IO.Put_Line ("Unable to get one or more of in/out/err handles.");
return False;
end if;
if not Load_Std_Settings then
return False;
end if;
-- Save the initial settings to be restored later.
Input_Settings := Win.To_DWORD (Std_Input.Settings);
Output_Settings := Win.To_DWORD (Std_Output.Settings);
Error_Settings := Win.To_DWORD (Std_Error.Settings);
Original_Input_CP := Win.GetConsoleCP;
Original_Output_CP := Win.GetConsoleOutputCP;
if not Enable_UTF8 then
Ada.Text_IO.Put_Line ("Unable to set UTF8 code page.");
return False;
end if;
return True;
end Init;
procedure Shutdown is
begin
if Win.SetConsoleMode (Std_Input.Handle, Input_Settings) = 0
or else Win.SetConsoleMode (Std_Output.Handle, Output_Settings) = 0
or else Win.SetConsoleMode (Std_Error.Handle, Error_Settings) = 0 then
Ada.Text_IO.Put_Line ("Unable to restore all terminal settings to originals.");
end if;
if Win.SetConsoleCP (Original_Input_CP) = 0 or else Win.SetConsoleOutputCP (Original_Output_CP) = 0 then
Ada.Text_IO.Put_Line ("Unable to restore original terminal code page.");
end if;
end Shutdown;
procedure Apply (Input : Input_Stream) is
begin
if Win.SetConsoleMode(Input.Handle, Win.To_DWORD(Input.Settings)) = 0 then
Ada.Text_IO.Put_Line ("Unable to change console modes: ERROR#" & Win.GetLastError'Image);
end if;
end Apply;
procedure Apply (Output : Output_Stream) is
begin
if Win.SetConsoleMode(Output.Handle, Win.To_DWORD(Output.Settings)) = 0 then
Ada.Text_IO.Put_Line ("Unable to change console modes: ERROR# " & Win.GetLastError'Image);
end if;
end Apply;
procedure Set (Setting : Input_Setting; Enabled : Boolean) is
begin
case Setting is
when Echo =>
Std_Input.Settings (Win.ENABLE_ECHO_INPUT) := Enabled;
Apply(Std_Input);
when Line_Input =>
Std_Input.Settings (Win.ENABLE_LINE_INPUT) := Enabled;
Apply(Std_Input);
when Signals_As_Input =>
Std_Input.Settings (Win.ENABLE_PROCESSED_INPUT) := not Enabled;
Apply(Std_Input);
end case;
end Set;
procedure Set (Setting : Output_Setting; Enabled : Boolean) is
begin
case Setting is
when Escape_Sequences =>
Std_Output.Settings (Win.ENABLE_VIRTUAL_TERMINAL_PROCESSING) := Enabled;
Std_Output.Settings (Win.ENABLE_WRAP_AT_EOL_OUTPUT) := True;
Std_Output.Settings (Win.DISABLE_NEWLINE_AUTO_RETURN) := False;
Std_Output.Settings (Win.ENABLE_PROCESSED_OUTPUT) := True;
Std_Error.Settings (Win.ENABLE_VIRTUAL_TERMINAL_PROCESSING) := Enabled;
Std_Error.Settings (Win.ENABLE_WRAP_AT_EOL_OUTPUT) := True;
Std_Error.Settings (Win.DISABLE_NEWLINE_AUTO_RETURN) := False;
Std_Error.Settings (Win.ENABLE_PROCESSED_OUTPUT) := True;
Std_Input.Settings (Win.ENABLE_VIRTUAL_TERMINAL_INPUT) := Enabled;
Apply(Std_Input);
Apply(Std_Output);
Apply(Std_Error);
end case;
end Set;
---------------------------------------------------------------------------
-- Inputs
---------------------------------------------------------------------------
-- Gets an entire input line from one keypress. E.g. all the characters
-- received for a controlling keypress, such as an arrow key.
function Get_Input return String is
Buffer_Size : constant := 512;
Buffer : aliased Interfaces.C.char_array := (1 .. Interfaces.C.size_t(Buffer_Size) => Interfaces.C.nul);
Chars_Read : aliased Win.DWORD;
use all type Interfaces.C.size_t;
begin
if Win.ReadConsoleA (Std_Input.Handle, Win.LPVOID(Interfaces.C.Strings.To_Chars_Ptr(Buffer'Unchecked_Access)),
Buffer_Size, Chars_Read'Unchecked_Access, 0) /= 0 then
return Interfaces.C.To_Ada(Buffer(1 .. Interfaces.C.size_t(Chars_Read) + 1));
else
return "";
end if;
end Get_Input;
function End_Of_Line return String is
begin
return Ada.Characters.Latin_1.CR & Ada.Characters.Latin_1.LF;
end End_Of_Line;
procedure Print_Configuration is
begin
Ada.Text_IO.Put_Line ("Input Mode: " & Win.To_DWORD (Std_Input.Settings)'Image);
Ada.Text_IO.Put_Line ("Output Mode: " & Win.To_DWORD (Std_Output.Settings)'Image);
Ada.Text_IO.Put_Line ("Error Mode: " & Win.To_DWORD (Std_Error.Settings)'Image);
end Print_Configuration;
end Trendy_Terminal.Platform;
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