mirror of
https://github.com/ShareX/ShareX.git
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124 lines
3.9 KiB
C#
124 lines
3.9 KiB
C#
#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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Copyright (c) 2007-2024 ShareX Team
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using System;
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using System.Diagnostics;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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namespace ShareX.HelpersLib
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{
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public class KeyboardHook : IDisposable
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{
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public event KeyEventHandler KeyDown, KeyUp;
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private HookProc keyboardHookProc;
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private IntPtr keyboardHookHandle = IntPtr.Zero;
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public KeyboardHook()
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{
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keyboardHookProc = KeyboardHookProc;
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keyboardHookHandle = SetHook(NativeConstants.WH_KEYBOARD_LL, keyboardHookProc);
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}
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~KeyboardHook()
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{
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Dispose();
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}
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private static IntPtr SetHook(int hookType, HookProc hookProc)
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{
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using (Process currentProcess = Process.GetCurrentProcess())
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using (ProcessModule currentModule = currentProcess.MainModule)
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{
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return NativeMethods.SetWindowsHookEx(hookType, hookProc, NativeMethods.GetModuleHandle(currentModule.ModuleName), 0);
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}
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}
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[MethodImpl(MethodImplOptions.NoInlining)]
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private IntPtr KeyboardHookProc(int nCode, IntPtr wParam, IntPtr lParam)
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{
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if (nCode >= 0)
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{
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bool handled = false;
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switch ((KeyEvent)wParam)
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{
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case KeyEvent.WM_KEYDOWN:
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case KeyEvent.WM_SYSKEYDOWN:
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handled = OnKeyDown(lParam);
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break;
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case KeyEvent.WM_KEYUP:
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case KeyEvent.WM_SYSKEYUP:
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handled = OnKeyUp(lParam);
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break;
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}
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if (handled)
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{
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return keyboardHookHandle;
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}
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}
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return NativeMethods.CallNextHookEx(keyboardHookHandle, nCode, wParam, lParam);
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}
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private bool OnKeyDown(IntPtr key)
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{
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if (KeyDown != null)
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{
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KeyEventArgs keyEventArgs = GetKeyEventArgs(key);
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KeyDown(this, keyEventArgs);
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return keyEventArgs.Handled || keyEventArgs.SuppressKeyPress;
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}
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return false;
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}
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private bool OnKeyUp(IntPtr key)
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{
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if (KeyUp != null)
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{
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KeyEventArgs keyEventArgs = GetKeyEventArgs(key);
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KeyUp(this, keyEventArgs);
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return keyEventArgs.Handled || keyEventArgs.SuppressKeyPress;
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}
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return false;
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}
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private KeyEventArgs GetKeyEventArgs(IntPtr key)
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{
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Keys keyData = (Keys)Marshal.ReadInt32(key) | Control.ModifierKeys;
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return new KeyEventArgs(keyData);
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}
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public void Dispose()
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{
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NativeMethods.UnhookWindowsHookEx(keyboardHookHandle);
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}
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}
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} |