332 lines
11 KiB
C#
332 lines
11 KiB
C#
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/* This software is licensed by the MIT License, see LICENSE file */
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/* Copyright © 2024-2025 Gregory Lirent */
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#if WINIPC_UA_SERVER
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using System.Runtime.InteropServices;
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using WinIPC.Models;
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namespace WinIPC.Utils
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{
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public class InputHandler
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{
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private Dictionary<IntPtr, Dictionary<Button, bool>> _state = new();
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[DllImport("user32.dll", SetLastError = true)]
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private static extern uint SendInput(uint nInputs, IntPtr pInputs, int cbSize);
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[DllImport("user32.dll", SetLastError = true)]
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private static extern IntPtr SendMessage(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam);
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[DllImport("user32.dll")]
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private static extern short GetKeyState(int nVirtKey);
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[DllImport("user32.dll")]
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private static extern int MapVirtualKey(int uCode, uint uMapType);
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private bool IsKeyPressed(int keyCode)
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{
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return (GetKeyState(keyCode) & 0x8000) != 0;
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}
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private ushort GetMouseKeyStates()
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{
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ushort keyStates = 0;
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if (IsKeyPressed(0x01)) keyStates |= 0x0001; // lbutton
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if (IsKeyPressed(0x02)) keyStates |= 0x0002; // rbutton
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if (IsKeyPressed(0x04)) keyStates |= 0x0010; // mbutton
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if (IsKeyPressed(0x05)) keyStates |= 0x0020; // xbutton1
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if (IsKeyPressed(0x06)) keyStates |= 0x0040; // xbutton2
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if (IsKeyPressed(0x10)) keyStates |= 0x0004; // Shift
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if (IsKeyPressed(0x11)) keyStates |= 0x0008; // Ctrl
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return keyStates;
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}
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[StructLayout(LayoutKind.Sequential)]
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private struct MOUSEINPUT
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{
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public int dx;
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public int dy;
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public int mouseData;
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public uint dwFlags;
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public uint time;
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public IntPtr dwExtraInfo;
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}
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[StructLayout(LayoutKind.Sequential)]
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private struct KEYBDINPUT
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{
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public ushort wVk;
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public ushort wScan;
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public uint dwFlags;
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public uint time;
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public IntPtr dwExtraInfo;
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}
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[StructLayout(LayoutKind.Explicit)]
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private struct INPUT
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{
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[FieldOffset(0)]
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public int type;
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[FieldOffset(8)]
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public MOUSEINPUT mi;
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[FieldOffset(8)]
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public KEYBDINPUT ki;
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}
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private static IntPtr MakeParam(int low, int high = 0)
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{
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return (high << 16) | (low & 0xffff);
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}
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private static IntPtr GetCursorPos(IntPtr hwnd)
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{
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WindowScanner.GetCursorPos(out var pos);
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if (hwnd != IntPtr.Zero)
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{
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WindowScanner.ScreenToClient(hwnd, ref pos);
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}
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return MakeParam(pos.X, pos.Y);
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}
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private static readonly int INPUT_SIZE = Marshal.SizeOf(typeof(INPUT));
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private Dictionary<Button, bool> GetStateDict(IntPtr hwnd)
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{
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Dictionary<Button, bool> state;
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if (_state.TryGetValue(hwnd, out var s))
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{
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state = s;
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}
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else { _state.Add(hwnd, state = new()); }
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return state;
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}
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private async Task<bool> ProcessMouseInput(IntPtr hwnd, Button button, bool press)
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{
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bool success = false;
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var state = GetStateDict(hwnd);
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if (state.TryGetValue(button, out var s) && s == press) return true;
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return await Task.Run(async () =>
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{
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if (hwnd == IntPtr.Zero)
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{
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var buffer = Marshal.AllocHGlobal(INPUT_SIZE);
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var input = new INPUT
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{
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type = 0x00,
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mi = new()
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};
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if (button.HasFlag(Button.MouseExtraFlag))
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{
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input.mi.dwFlags = (uint)Button.MouseExtraFlag << (press ? 0 : 1);
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input.mi.mouseData = (int)(button & ~Button.MouseExtraFlag);
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}
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else
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{
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input.mi.dwFlags = (uint)button << (press ? 0 : 1);
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}
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Marshal.StructureToPtr(input, buffer, true);
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success = await Task.Run(() => { return 1 != SendInput(1, buffer, INPUT_SIZE); });
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Marshal.FreeHGlobal(buffer);
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}
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else
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{
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int msg = 0;
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int wFlags = 0;
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switch(button)
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{
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case Button.MouseLeft:
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msg = press ? 0x0201 : 0x0202;
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break;
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case Button.MouseRight:
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msg = press ? 0x0204 : 0x0205;
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break;
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case Button.MouseMiddle:
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msg = press ? 0x0207 : 0x0208;
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break;
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case Button.MouseExtra1:
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case Button.MouseExtra2:
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msg = press ? 0x020b : 0x020c;
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wFlags = (int)button & 0x7f;
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break;
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default:
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// TODO Log
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break;
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}
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SendMessage(hwnd, msg, MakeParam(GetMouseKeyStates(), wFlags), GetCursorPos(hwnd));
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success = true;
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}
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if (success) state[button] = press;
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return success;
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});
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}
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private async Task<bool> ProcessKeyboardInput(IntPtr hwnd, Button button, bool press)
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{
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bool success = false;
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var state = GetStateDict(hwnd);
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if (state.TryGetValue(button, out var s) && s == press) return true;
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return await Task.Run<bool>(async () =>
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{
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if (hwnd == IntPtr.Zero)
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{
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var buffer = Marshal.AllocHGlobal(INPUT_SIZE);
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var flags = (uint)(press ? 0x00 : 0x02);
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var input = new INPUT
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{
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type = 0x01,
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ki = new()
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};
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if (button.HasFlag(Button.ExtendedKeyFlag))
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{
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flags |= 0x01;
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button &= ~Button.ExtendedKeyFlag;
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}
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input.ki.wVk = (ushort)button;
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input.ki.dwFlags = flags;
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Marshal.StructureToPtr(input, buffer, true);
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success = await Task.Run(() => { return 1 != SendInput(1, buffer, INPUT_SIZE); });
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Marshal.FreeHGlobal(buffer);
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}
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else
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{
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var btn = (int)(button & ~Button.ExtendedKeyFlag);
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var msg = press ? 0x0100 : 0x0101;
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if (button == Button.LAlt || button == Button.RAlt) msg += 4;
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int flags = MapVirtualKey(btn, 0) | (button.HasFlag(Button.ExtendedKeyFlag) ? 0x0100 : 0) |
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(IsKeyPressed(0x12) ? 0x2000 : 0) | (s ? 0x4000 : 0) | (press ? 0 : 0x8000);
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SendMessage(hwnd, msg, MakeParam(btn), MakeParam(1, flags));
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success = true;
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}
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if (success) state[button] = press;
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return success;
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});
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}
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public async Task<bool> KeyUp(IntPtr hwnd, Button button, int delay)
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{
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Task<bool> pTask;
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bool success;
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if (button.HasFlag(Button.MouseKeyFlag))
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{
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pTask = ProcessMouseInput(hwnd, button & ~Button.MouseKeyFlag, false);
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}
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else
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{
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pTask = ProcessKeyboardInput(hwnd, button, false);
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}
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if (success = await pTask)
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{
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await Task.Delay(delay);
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}
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return success;
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}
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public async Task<bool> KeyDown(IntPtr hwnd, Button button, int delay)
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{
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Task<bool> pTask;
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bool success;
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if (button.HasFlag(Button.MouseKeyFlag))
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{
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pTask = ProcessMouseInput(hwnd, button & ~Button.MouseKeyFlag, true);
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}
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else
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{
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pTask = ProcessKeyboardInput(hwnd, button, true);
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}
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if (success = await pTask)
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{
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await Task.Delay(delay);
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}
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return success;
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}
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public async Task<bool> MouseScroll(IntPtr hwnd, int offset, int delay)
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{
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bool success = false;
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if (hwnd == IntPtr.Zero)
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{
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var buffer = Marshal.AllocHGlobal(INPUT_SIZE);
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var input = new INPUT
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{
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type = 0x00,
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mi = new MOUSEINPUT
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{
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dwFlags = 0x0800,
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mouseData = offset
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}
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};
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Marshal.StructureToPtr(input, buffer, true);
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success = await Task.Run(() => { return 1 != SendInput(1, buffer, INPUT_SIZE); });
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Marshal.FreeHGlobal(buffer);
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}
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else
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{
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SendMessage(hwnd, 0x020a, MakeParam(GetMouseKeyStates(), offset), GetCursorPos(IntPtr.Zero));
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success = true;
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}
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await Task.Delay(delay);
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return success;
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}
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public async Task<bool> MouseMove(IntPtr hwnd, int x, int y, int delay)
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{
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bool success = false;
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if (hwnd == IntPtr.Zero)
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{
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var buffer = Marshal.AllocHGlobal(INPUT_SIZE);
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var input = new INPUT
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{
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type = 0x00,
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mi = new MOUSEINPUT
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{
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dwFlags = 0x8001,
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dx = x,
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dy = y
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}
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};
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Marshal.StructureToPtr(input, buffer, true);
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success = await Task.Run(() => { return 1 != SendInput(1, buffer, INPUT_SIZE); });
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Marshal.FreeHGlobal(buffer);
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}
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else
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{
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SendMessage(hwnd, 0x0200, MakeParam(GetMouseKeyStates()), MakeParam(x, y));
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success = true;
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}
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await Task.Delay(delay);
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return success;
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}
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}
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}
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#endif
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