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https://github.com/microsoft/PowerToys.git
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94 lines
3.0 KiB
C#
94 lines
3.0 KiB
C#
using System;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using Wox.Plugin;
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namespace Wox.Infrastructure
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{
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/// <summary>
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/// Listens keyboard globally.
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/// <remarks>Uses WH_KEYBOARD_LL.</remarks>
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/// </summary>
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public class GlobalHotkey : IDisposable
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{
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private InterceptKeys.LowLevelKeyboardProc hookedLowLevelKeyboardProc;
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private IntPtr hookId = IntPtr.Zero;
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public delegate bool KeyboardCallback(KeyEvent keyEvent, int vkCode, SpecialKeyState state);
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public event KeyboardCallback hookedKeyboardCallback;
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//Modifier key constants
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private const int VK_SHIFT = 0x10;
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private const int VK_CONTROL = 0x11;
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private const int VK_ALT = 0x12;
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private const int VK_WIN = 91;
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public GlobalHotkey()
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{
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// We have to store the LowLevelKeyboardProc, so that it is not garbage collected runtime
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hookedLowLevelKeyboardProc = LowLevelKeyboardProc;
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// Set the hook
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hookId = InterceptKeys.SetHook(hookedLowLevelKeyboardProc);
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}
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public SpecialKeyState CheckModifiers()
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{
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SpecialKeyState state = new SpecialKeyState();
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if ((InterceptKeys.GetKeyState(VK_SHIFT) & 0x8000) != 0)
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{
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//SHIFT is pressed
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state.ShiftPressed = true;
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}
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if ((InterceptKeys.GetKeyState(VK_CONTROL) & 0x8000) != 0)
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{
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//CONTROL is pressed
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state.CtrlPressed = true;
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}
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if ((InterceptKeys.GetKeyState(VK_ALT) & 0x8000) != 0)
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{
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//ALT is pressed
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state.AltPressed = true;
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}
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if ((InterceptKeys.GetKeyState(VK_WIN) & 0x8000) != 0)
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{
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//ALT is pressed
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state.WinPressed = true;
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}
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return state;
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}
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[MethodImpl(MethodImplOptions.NoInlining)]
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private IntPtr LowLevelKeyboardProc(int nCode, UIntPtr wParam, IntPtr lParam)
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{
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bool continues = true;
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if (nCode >= 0)
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{
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if (wParam.ToUInt32() == (int)KeyEvent.WM_KEYDOWN ||
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wParam.ToUInt32() == (int)KeyEvent.WM_KEYUP ||
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wParam.ToUInt32() == (int)KeyEvent.WM_SYSKEYDOWN ||
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wParam.ToUInt32() == (int)KeyEvent.WM_SYSKEYUP)
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{
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if (hookedKeyboardCallback != null)
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continues = hookedKeyboardCallback((KeyEvent)wParam.ToUInt32(), Marshal.ReadInt32(lParam), CheckModifiers());
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}
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}
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if (continues)
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{
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return InterceptKeys.CallNextHookEx(hookId, nCode, wParam, lParam);
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}
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return (IntPtr)1;
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}
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~GlobalHotkey()
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{
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Dispose();
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}
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public void Dispose()
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{
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InterceptKeys.UnhookWindowsHookEx(hookId);
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}
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}
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} |