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@tomlm
tomlm committed Jan 2, 2025
1 parent b5b4a3f commit 7c1fc1e
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Showing 4 changed files with 126 additions and 408 deletions.
3 changes: 3 additions & 0 deletions src/Consolonia.GuiCS/Consolonia.GuiCS.csproj
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<EnforceCodeStyleInBuild>false</EnforceCodeStyleInBuild>
<EnableNETAnalyzers>false</EnableNETAnalyzers>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Vanara.PInvoke.Kernel32" Version="4.0.4" />
</ItemGroup>

</Project>
339 changes: 53 additions & 286 deletions src/Consolonia.GuiCS/WindowsDriver.cs
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using System;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.InteropServices;

using System.Runtime.Versioning;
using Vanara.PInvoke;
using static Vanara.PInvoke.Kernel32;

namespace Terminal.Gui
{
internal class WindowsConsole {
public const int STD_INPUT_HANDLE = -10;

internal IntPtr InputHandle;
readonly uint originalConsoleMode;

public WindowsConsole ()
{
InputHandle = GetStdHandle (STD_INPUT_HANDLE);
originalConsoleMode = ConsoleMode;
var newConsoleMode = originalConsoleMode;
newConsoleMode |= (uint)(ConsoleModes.EnableMouseInput | ConsoleModes.EnableExtendedFlags);
newConsoleMode &= ~(uint)ConsoleModes.EnableQuickEditMode;
newConsoleMode &= ~(uint)ConsoleModes.EnableProcessedInput;
ConsoleMode = newConsoleMode;
}

public uint ConsoleMode {
get {
GetConsoleMode (InputHandle, out uint v);
return v;
}
set {
SetConsoleMode (InputHandle, value);
}
}

[Flags]
public enum ConsoleModes : uint {
EnableProcessedInput = 1,
EnableMouseInput = 16,
EnableQuickEditMode = 64,
EnableExtendedFlags = 128,
}

[StructLayout (LayoutKind.Explicit, CharSet = CharSet.Unicode)]
public struct KeyEventRecord {
[FieldOffset (0), MarshalAs (UnmanagedType.Bool)]
public bool bKeyDown;
[FieldOffset (4), MarshalAs (UnmanagedType.U2)]
public ushort wRepeatCount;
[FieldOffset (6), MarshalAs (UnmanagedType.U2)]
public ushort wVirtualKeyCode;
[FieldOffset (8), MarshalAs (UnmanagedType.U2)]
public ushort wVirtualScanCode;
[FieldOffset (10)]
public char UnicodeChar;
[FieldOffset (12), MarshalAs (UnmanagedType.U4)]
public ControlKeyState dwControlKeyState;
}

[Flags]
public enum ButtonState {
Button1Pressed = 1,
Button2Pressed = 4,
Button3Pressed = 8,
Button4Pressed = 16,
RightmostButtonPressed = 2
}

[Flags]
public enum ControlKeyState {
RightAltPressed = 1,
LeftAltPressed = 2,
RightControlPressed = 4,
LeftControlPressed = 8,
ShiftPressed = 16,
NumlockOn = 32,
ScrolllockOn = 64,
CapslockOn = 128,
EnhancedKey = 256
}

[Flags]
public enum EventFlags {
MouseMoved = 1,
DoubleClick = 2,
MouseWheeled = 4,
MouseHorizontalWheeled = 8
}

[StructLayout (LayoutKind.Explicit)]
public struct MouseEventRecord {
[FieldOffset (0)]
public Coord MousePosition;
[FieldOffset (4)]
public ButtonState ButtonState;
[FieldOffset (8)]
public ControlKeyState ControlKeyState;
[FieldOffset (12)]
public EventFlags EventFlags;

public override string ToString ()
{
return $"[Mouse({MousePosition},{ButtonState},{ControlKeyState},{EventFlags}";
}
}

public struct WindowBufferSizeRecord {
#pragma warning disable CS0649
public Coord size;
#pragma warning restore CS0649

public override string ToString () => $"[WindowBufferSize{size}";
}

[StructLayout (LayoutKind.Sequential)]
public struct MenuEventRecord {
public uint dwCommandId;
}

[StructLayout (LayoutKind.Sequential)]
public struct FocusEventRecord {
public uint bSetFocus;
}

public enum EventType : ushort {
Focus = 0x10,
Key = 0x1,
Menu = 0x8,
Mouse = 2,
WindowBufferSize = 4
}

[StructLayout (LayoutKind.Explicit)]
public struct InputRecord {
[FieldOffset (0)]
public EventType EventType;
[FieldOffset (4)]
public KeyEventRecord KeyEvent;
[FieldOffset (4)]
public MouseEventRecord MouseEvent;
[FieldOffset (4)]
public WindowBufferSizeRecord WindowBufferSizeEvent;
[FieldOffset (4)]
public MenuEventRecord MenuEvent;
[FieldOffset (4)]
public FocusEventRecord FocusEvent;

public override string ToString ()
{
switch (EventType) {
case EventType.Focus:
return FocusEvent.ToString ();
case EventType.Key:
return KeyEvent.ToString ();
case EventType.Menu:
return MenuEvent.ToString ();
case EventType.Mouse:
return MouseEvent.ToString ();
case EventType.WindowBufferSize:
return WindowBufferSizeEvent.ToString ();
default:
return "Unknown event type: " + EventType;
}
}
};


[StructLayout (LayoutKind.Sequential)]
public struct Coord {
public short X;
public short Y;

public Coord (short X, short Y)
{
this.X = X;
this.Y = Y;
}
public override string ToString () => $"({X},{Y})";
};

[StructLayout (LayoutKind.Explicit, CharSet = CharSet.Unicode)]
public struct CharUnion {
[FieldOffset (0)] public char UnicodeChar;
[FieldOffset (0)] public byte AsciiChar;
}

[StructLayout (LayoutKind.Sequential)]
public struct SmallRect {
public short Left;
public short Top;
public short Right;
public short Bottom;

public SmallRect (short left, short top, short right, short bottom)
{
Left = left;
Top = top;
Right = right;
Bottom = bottom;
}


public override string ToString ()
{
return $"Left={Left},Top={Top},Right={Right},Bottom={Bottom}";
}
}

[DllImport ("kernel32.dll", SetLastError = true)]
static extern IntPtr GetStdHandle (int nStdHandle);

[DllImport ("kernel32.dll", EntryPoint = "ReadConsoleInputW", CharSet = CharSet.Unicode)]
public static extern bool ReadConsoleInput (
IntPtr hConsoleInput,
IntPtr lpBuffer,
uint nLength,
out uint lpNumberOfEventsRead);


[StructLayout (LayoutKind.Sequential)]
public struct ConsoleCursorInfo {
public uint dwSize;
public bool bVisible;
}

[DllImport ("kernel32.dll")]
static extern bool GetConsoleMode (IntPtr hConsoleHandle, out uint lpMode);


[DllImport ("kernel32.dll")]
static extern bool SetConsoleMode (IntPtr hConsoleHandle, uint dwMode);

public InputRecord [] ReadConsoleInput ()
{
const int bufferSize = 1;
var pRecord = Marshal.AllocHGlobal (Marshal.SizeOf<InputRecord> () * bufferSize);
try {
ReadConsoleInput (InputHandle, pRecord, bufferSize,
out var numberEventsRead);

return numberEventsRead == 0
? null
: new [] { Marshal.PtrToStructure<InputRecord> (pRecord) };
} catch (Exception) {
return null;
} finally {
Marshal.FreeHGlobal (pRecord);
}
}

[StructLayout (LayoutKind.Sequential)]
public struct CONSOLE_SCREEN_BUFFER_INFOEX {
public uint cbSize;
public Coord dwSize;
public Coord dwCursorPosition;
public ushort wAttributes;
public SmallRect srWindow;
public Coord dwMaximumWindowSize;
public ushort wPopupAttributes;
public bool bFullscreenSupported;

[MarshalAs (UnmanagedType.ByValArray, SizeConst = 16)]
public COLORREF [] ColorTable;
}

[StructLayout (LayoutKind.Explicit, Size = 4)]
public struct COLORREF {
public COLORREF (byte r, byte g, byte b)
{
Value = 0;
R = r;
G = g;
B = b;
}

public COLORREF (uint value)
{
R = 0;
G = 0;
B = 0;
Value = value & 0x00FFFFFF;
}

[FieldOffset (0)]
public byte R;
[FieldOffset (1)]
public byte G;
[FieldOffset (2)]
public byte B;

[FieldOffset (0)]
public uint Value;
}
[SupportedOSPlatform("windows")]
internal class WindowsConsole
{

internal HFILE InputHandle;
readonly CONSOLE_INPUT_MODE originalConsoleMode;

public WindowsConsole()
{
InputHandle = GetStdHandle(StdHandleType.STD_INPUT_HANDLE);
originalConsoleMode = ConsoleMode;
var newConsoleMode = originalConsoleMode;
newConsoleMode |= (CONSOLE_INPUT_MODE.ENABLE_MOUSE_INPUT |
CONSOLE_INPUT_MODE.ENABLE_EXTENDED_FLAGS);
newConsoleMode &= ~CONSOLE_INPUT_MODE.ENABLE_QUICK_EDIT_MODE;
newConsoleMode &= ~CONSOLE_INPUT_MODE.ENABLE_PROCESSED_INPUT;
ConsoleMode = newConsoleMode;
}

public CONSOLE_INPUT_MODE ConsoleMode
{
get
{
GetConsoleMode(InputHandle, out CONSOLE_INPUT_MODE v);
return v;
}
set
{
SetConsoleMode(InputHandle, value);
}
}

public INPUT_RECORD[] ReadConsoleInput()
{
const int bufferSize = 1;
var records = new INPUT_RECORD[bufferSize];
try
{
Kernel32.ReadConsoleInput(InputHandle, records, bufferSize,
out var numberEventsRead);

return numberEventsRead == 0
? null
: records;
}
catch (Exception)
{
return null;
}
}
}
}
3 changes: 3 additions & 0 deletions src/Consolonia.PlatformSupport/Consolonia.PlatformSupport.csproj
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@@ -1,5 +1,8 @@
<Project Sdk="Microsoft.NET.Sdk">
<Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Core.Build.props', '$(MSBuildThisFileDirectory)../'))" />
<ItemGroup>
<PackageReference Include="Vanara.PInvoke.Kernel32" Version="4.0.4" />
</ItemGroup>

<ItemGroup>
<ProjectReference Include="..\Consolonia.Core\Consolonia.Core.csproj" />
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