| public static VirtualKeyFromKey ( Key key ) : int | ||
| key | Key | |
| return | int | |
private bool TextServicesKeystroke(TextServicesContext context, KeyEventArgs keyArgs, bool test)
{
TextServicesContext.KeyOp keyop;
int wParam;
int lParam;
int scancode;
// Cicero's Keystroke Manager and TIP does not recognize VK_RSHIFT or VK_LSHIFT.
// We need to pass VK_SHIFT and the proper scancode.
//
switch (keyArgs.RealKey)
{
case Key.RightShift:
wParam = NativeMethods.VK_SHIFT;
scancode = 0x36;
break;
case Key.LeftShift:
wParam = NativeMethods.VK_SHIFT;
scancode = 0x2A;
break;
default:
wParam = KeyInterop.VirtualKeyFromKey(keyArgs.RealKey);
scancode = 0;
break;
}
lParam = (int)(((uint)scancode << 16) | 1);
if (keyArgs.RoutedEvent == Keyboard.PreviewKeyDownEvent /*keyArgs.IsDown*/)
{
keyop = test ? TextServicesContext.KeyOp.TestDown : TextServicesContext.KeyOp.Down;
}
else
{
// Previous key state and transition state always 1 for WM_KEYUP.
lParam |= (1 << 31) | (1 << 30);
keyop = test ? TextServicesContext.KeyOp.TestUp : TextServicesContext.KeyOp.Up;
}
return(context.Keystroke(wParam, lParam, keyop));
}
/// <summary>
/// Gets the current state of the specified key from the device from the underlying system
/// </summary>
/// <param name="key">
/// Key to get the state of
/// </param>
/// <returns>
/// The state of the specified key
/// </returns>
protected override KeyStates GetKeyStatesFromSystem(Key key)
{
KeyStates keyStates = KeyStates.None;
int virtualKeyCode = KeyInterop.VirtualKeyFromKey(key);
int nativeKeyState = UnsafeNativeMethods.GetKeyState(virtualKeyCode);
if ((nativeKeyState & 0x00008000) == 0x00008000)
{
keyStates |= KeyStates.Down;
}
if ((nativeKeyState & 0x00000001) == 0x00000001)
{
keyStates |= KeyStates.Toggled;
}
return(keyStates);
}
public static KeyUpNotification ToKeyUpNotification(this KeyEventArgs eventArgs)
{
return(new KeyUpNotification((Forms.Keys)KeyInterop.VirtualKeyFromKey(eventArgs.Key), null));
}
/// <summary>
/// Gets the current state of the specified key from the device from the underlying system
/// </summary>
/// <param name="key">
/// Key to get the state of
/// </param>
/// <returns>
/// The state of the specified key
/// </returns>
protected override KeyStates GetKeyStatesFromSystem(Key key)
{
KeyStates keyStates = KeyStates.None;
bool getKeyStatesFromSystem = false;
if (IsActive)
{
// Our keyboard device is only active if some WPF window in
// this AppDomain has focus. It is always safe to return
// the state of keys.
getKeyStatesFromSystem = true;
}
else if (SecurityHelper.AppDomainGrantedUnrestrictedUIPermission)
{
// This is a trusted AppDomain, so we are willing to expose
// the state of keys regardless of whether or not a WPF
// window has focus. This is important for child HWND
// hosting scenarios.
getKeyStatesFromSystem = true;
}
else
{
// Security Mitigation:
// No WPF window has focus in this AppDomain, and this is a
// partially-trusted AppDomain, so we do not generally want
// to expose the state of keys. However, we make an exception
// for modifier keys, as they are considered safe.
switch (key)
{
case Key.LeftAlt:
case Key.RightAlt:
case Key.LeftCtrl:
case Key.RightCtrl:
case Key.LeftShift:
case Key.RightShift:
getKeyStatesFromSystem = true;
break;
}
}
if (getKeyStatesFromSystem)
{
int virtualKeyCode = KeyInterop.VirtualKeyFromKey(key);
int nativeKeyState;
nativeKeyState = UnsafeNativeMethods.GetKeyState(virtualKeyCode);
if ((nativeKeyState & 0x00008000) == 0x00008000)
{
keyStates |= KeyStates.Down;
}
if ((nativeKeyState & 0x00000001) == 0x00000001)
{
keyStates |= KeyStates.Toggled;
}
}
return(keyStates);
}