106 lines
3.2 KiB
C#
106 lines
3.2 KiB
C#
using System;
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using System.Runtime.InteropServices;
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using System.Windows.Input;
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namespace Paca.App.Services;
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public sealed class GlobalHotkeyService : IDisposable
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{
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public const uint MOD_ALT = 0x0001;
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public const uint MOD_CONTROL = 0x0002;
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public const uint MOD_SHIFT = 0x0004;
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public const uint MOD_WIN = 0x0008;
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public const uint MOD_NOREPEAT = 0x4000;
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public const int WM_HOTKEY = 0x0312;
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[DllImport("user32.dll", SetLastError = true)]
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private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
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[DllImport("user32.dll", SetLastError = true)]
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private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
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private IntPtr _hWnd;
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private int _currentId;
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private bool _isRegistered;
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public bool IsRegistered => _isRegistered;
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public event Action? HotkeyPressed;
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public bool Register(IntPtr hWnd, int id, string hotkeyStr)
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{
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Unregister();
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if (!TryParseHotkey(hotkeyStr, out uint modifiers, out uint vk))
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{
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return false;
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}
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_hWnd = hWnd;
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_currentId = id;
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_isRegistered = RegisterHotKey(_hWnd, _currentId, modifiers | MOD_NOREPEAT, vk);
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return _isRegistered;
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}
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public void Unregister()
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{
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if (_isRegistered && _hWnd != IntPtr.Zero)
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{
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UnregisterHotKey(_hWnd, _currentId);
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_isRegistered = false;
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}
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}
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public IntPtr HandleWindowMessages(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
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{
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if (msg == WM_HOTKEY && wParam.ToInt32() == _currentId)
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{
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HotkeyPressed?.Invoke();
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handled = true;
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}
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return IntPtr.Zero;
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}
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public static bool TryParseHotkey(string? hotkeyStr, out uint fsModifiers, out uint vk)
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{
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fsModifiers = 0;
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vk = 0;
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if (string.IsNullOrWhiteSpace(hotkeyStr)) return false;
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var parts = hotkeyStr.Split('+', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);
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if (parts.Length == 0) return false;
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for (int i = 0; i < parts.Length - 1; i++)
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{
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var part = parts[i].ToLowerInvariant();
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if (part is "ctrl" or "control") fsModifiers |= MOD_CONTROL;
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else if (part is "alt") fsModifiers |= MOD_ALT;
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else if (part is "shift") fsModifiers |= MOD_SHIFT;
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else if (part is "win" or "windows") fsModifiers |= MOD_WIN;
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else return false;
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}
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var keyPart = parts[^1].ToUpperInvariant();
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if (keyPart is "SPACE") vk = 0x20;
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else if (keyPart is "RETURN" or "ENTER") vk = 0x0D;
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else if (keyPart is "ESCAPE" or "ESC") vk = 0x1B;
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else if (keyPart.Length == 1 && keyPart[0] >= 'A' && keyPart[0] <= 'Z') vk = (uint)keyPart[0];
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else if (keyPart.Length == 1 && keyPart[0] >= '0' && keyPart[0] <= '9') vk = (uint)keyPart[0];
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else if (keyPart.StartsWith("F") && int.TryParse(keyPart[1..], out int fNum) && fNum >= 1 && fNum <= 24)
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{
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vk = (uint)(0x70 + (fNum - 1)); // VK_F1 = 0x70
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}
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else
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{
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return false;
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}
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return true;
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}
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public void Dispose()
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{
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Unregister();
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}
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}
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