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Merged
stephentoub merged 1 commit into from
Apr 29, 2020
Merged

Add a WebAssembly version of System.Console. #35555

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18 changes: 17 additions & 1 deletion src/libraries/System.Console/src/System.Console.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,22 @@
<Link>Common\Interop\Android\Interop.Libraries.cs</Link>
</Compile>
</ItemGroup>
<!-- WebAssembly -->
<ItemGroup Condition="'$(TargetsBrowser)' == 'true'">
<Compile Include="System\ConsolePal.WebAssembly.cs" />
<Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.Dup.cs"
Link="Common\Interop\Unix\Interop.Dup.cs" />
<Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.Write.cs"
Link="Common\Interop\Unix\Interop.Write.cs" />
<Compile Include="$(CommonPath)Interop\Unix\Interop.Libraries.cs"
Link="Common\Interop\Unix\Interop.Libraries.cs" />
<Compile Include="$(CommonPath)Interop\Unix\Interop.Errors.cs"
Link="Common\Interop\Unix\Interop.Errors.cs" />
<Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.FileDescriptors.cs"
Link="Common\Interop\Unix\Interop.FileDescriptors.cs" />
<Compile Include="$(CommonPath)Interop\Unix\Interop.IOErrors.cs"
Link="Common\Interop\Unix\Interop.IOErrors.cs" />
</ItemGroup>
<!-- Windows -->
<ItemGroup Condition="'$(TargetsWindows)' == 'true'">
<Compile Include="System\ConsolePal.Windows.cs" />
Expand Down Expand Up @@ -135,7 +151,7 @@
Link="Common\System\Text\ValueStringBuilder.cs" />
</ItemGroup>
<!-- Unix -->
<ItemGroup Condition=" '$(TargetsUnix)' == 'true' and '$(TargetsAndroid)' != 'true' and '$(TargetsiOS)' != 'true' and '$(TargetstvOS)' != 'true'">
<ItemGroup Condition=" '$(TargetsUnix)' == 'true' and '$(TargetsAndroid)' != 'true' and '$(TargetsiOS)' != 'true' and '$(TargetstvOS)' != 'true' and '$(TargetsBrowser)' != 'true'">
<Compile Include="System\ConsolePal.Unix.cs" />
<Compile Include="System\TermInfo.cs" />
<Compile Include="System\IO\StdInReader.cs" />
Expand Down
226 changes: 226 additions & 0 deletions src/libraries/System.Console/src/System/ConsolePal.WebAssembly.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,226 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System.IO;
using System.Text;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;

namespace System
{
internal sealed class WasmConsoleStream : ConsoleStream
{
private readonly SafeFileHandle _handle;

internal WasmConsoleStream(SafeFileHandle handle, FileAccess access)
: base(access)
{
_handle = handle;
}

protected override void Dispose(bool disposing)
{
if (disposing)
{
_handle.Dispose();
}
base.Dispose(disposing);
}

public override int Read(byte[] buffer, int offset, int count) => throw Error.GetReadNotSupported();

public override unsafe void Write(byte[] buffer, int offset, int count)
{
ValidateWrite(buffer, offset, count);

fixed (byte* bufPtr = buffer)
{
Write(_handle, bufPtr + offset, count);
}
}

private static unsafe void Write(SafeFileHandle fd, byte* bufPtr, int count)
{
while (count > 0)
{
int bytesWritten = Interop.Sys.Write(fd, bufPtr, count);
if (bytesWritten < 0)
{
Interop.ErrorInfo errorInfo = Interop.Sys.GetLastErrorInfo();
if (errorInfo.Error == Interop.Error.EPIPE)
{
return;
}
else
{
throw Interop.GetIOException(errorInfo);
}
}

count -= bytesWritten;
bufPtr += bytesWritten;
}
}

public override void Flush()
{
if (_handle.IsClosed)
{
throw Error.GetFileNotOpen();
}
base.Flush();
}
}

internal static class ConsolePal
{
internal static void EnsureConsoleInitialized() { }

public static Stream OpenStandardInput() => throw new PlatformNotSupportedException();

public static Stream OpenStandardOutput()
{
return new WasmConsoleStream(Interop.Sys.Dup(Interop.Sys.FileDescriptors.STDOUT_FILENO), FileAccess.Write);
}

public static Stream OpenStandardError()
{
return new WasmConsoleStream(Interop.Sys.Dup(Interop.Sys.FileDescriptors.STDERR_FILENO), FileAccess.Write);
}

public static Encoding InputEncoding => throw new PlatformNotSupportedException();

public static void SetConsoleInputEncoding(Encoding enc) => throw new PlatformNotSupportedException();

public static Encoding OutputEncoding => Encoding.Unicode;

public static void SetConsoleOutputEncoding(Encoding enc) => throw new PlatformNotSupportedException();

public static bool IsInputRedirectedCore() => false;

public static bool IsOutputRedirectedCore() => false;

public static bool IsErrorRedirectedCore() => false;

internal static TextReader GetOrCreateReader() => throw new PlatformNotSupportedException();

public static bool NumberLock => false;

public static bool CapsLock => false;

public static bool KeyAvailable => false;

public static ConsoleKeyInfo ReadKey(bool intercept) => throw new PlatformNotSupportedException();

public static bool TreatControlCAsInput
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static ConsoleColor BackgroundColor
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static ConsoleColor ForegroundColor
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static void ResetColor() => throw new PlatformNotSupportedException();

public static int CursorSize
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static bool CursorVisible
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static int CursorLeft => throw new PlatformNotSupportedException();

public static int CursorTop => throw new PlatformNotSupportedException();

public static string Title
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static void Beep() => throw new PlatformNotSupportedException();

public static void Beep(int frequency, int duration) => throw new PlatformNotSupportedException();

public static void MoveBufferArea(int sourceLeft, int sourceTop,
int sourceWidth, int sourceHeight, int targetLeft, int targetTop,
char sourceChar, ConsoleColor sourceForeColor,
ConsoleColor sourceBackColor) => throw new PlatformNotSupportedException();

public static void Clear() => throw new PlatformNotSupportedException();

public static void SetCursorPosition(int left, int top) => throw new PlatformNotSupportedException();

public static int BufferWidth
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static int BufferHeight
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static void SetBufferSize(int width, int height) => throw new PlatformNotSupportedException();

public static int LargestWindowWidth => throw new PlatformNotSupportedException();

public static int LargestWindowHeight => throw new PlatformNotSupportedException();

public static int WindowLeft
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static int WindowTop
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static int WindowWidth
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static int WindowHeight
{
get => throw new PlatformNotSupportedException();
set => throw new PlatformNotSupportedException();
}

public static void SetWindowPosition(int left, int top) => throw new PlatformNotSupportedException();

public static void SetWindowSize(int width, int height) => throw new PlatformNotSupportedException();

internal sealed class ControlCHandlerRegistrar
{
internal ControlCHandlerRegistrar() => throw new PlatformNotSupportedException();

internal void Register() => throw new PlatformNotSupportedException();

internal void Unregister() => throw new PlatformNotSupportedException();
}
}
}