private IntPtr HookCallback(int nCode, IntPtr wParam, ref LowLevelKeyboardEvent lParam)
{
if (nCode < 0)
{
return(CallNextHookEx(_keyboardHookHandle, nCode, wParam, ref lParam));
}
if (KeyboardStateManager.SimulatingKey)
{
return(_preventProcessing);
}
var currentKey = (VirtualKeys)lParam.VirtualKeyCode;
var isKeyUp = (wParam == WM_KEYUP || wParam == WM_SYSKEYUP);
var leaderKeyCurrent = currentKey == this._parser.LeaderKey;
if (currentKey == _lastKey && _lastKeyDirection == isKeyUp && _hotKeyIsDown)
{
//already handled this case, early exit here since keydown triggers continuously
return(_preventProcessing);
}
_lastKey = currentKey;
_lastKeyDirection = isKeyUp;
if (!isKeyUp)
{
this.PressedKeys.Add(currentKey);
}
if (leaderKeyCurrent)
{
_hotKeyIsDown = !isKeyUp;
if (isKeyUp)
{
this.PressedKeys.Clear();
}
return(_preventProcessing);
}
if (!_hotKeyIsDown || this.PressedKeys.Count == 0)
{
this.PressedKeys.Clear();
return(CallNextHookEx(_keyboardHookHandle, nCode, wParam, ref lParam));
}
var currentCombination = new KeyboardCombination(this.PressedKeys);
var combinationDown = this.Combinations.FirstOrDefault(c => c.IsPressed(currentCombination));
if (combinationDown == null || combinationDown.Shortcut.Count == 0)
{
if (isKeyUp)
{
this.PressedKeys.Remove(currentKey);
}
return(!isKeyUp
? _preventProcessing
: CallNextHookEx(_keyboardHookHandle, nCode, wParam, ref lParam));
}
//keyCombination is down, prevent from activating command unless we receive a keyup.
//we could still be building up our key combination
if (!isKeyUp)
{
return(_preventProcessing);
}
Task.Run(combinationDown.Action);
if (isKeyUp)
{
this.PressedKeys.Remove(currentKey);
}
return(_preventProcessing);
}
public bool IsPressed(KeyboardCombination combination) => this.ShortcutAlternatives.Any(p => p.SetEquals(combination.Shortcut));
