void InitializeIME()
{
if (imeState.HwndSource != null)
{
return;
}
imeState.HwndSource = PresentationSource.FromVisual(textView.VisualElement) as HwndSource;
if (imeState.HwndSource == null)
{
return;
}
Debug.Assert(imeState.Context == IntPtr.Zero);
Debug.Assert(imeState.HWND == IntPtr.Zero);
Debug.Assert(imeState.OldContext == IntPtr.Zero);
if (textView.Options.DoesViewProhibitUserInput())
{
imeState.Context = IntPtr.Zero;
imeState.HWND = IntPtr.Zero;
}
else
{
imeState.HWND = ImeState.ImmGetDefaultIMEWnd(IntPtr.Zero);
imeState.Context = ImeState.ImmGetContext(imeState.HWND);
}
imeState.OldContext = ImeState.ImmAssociateContext(imeState.HwndSource.Handle, imeState.Context);
imeState.HwndSource.AddHook(WndProc);
TfThreadMgrHelper.SetFocus();
}
void StopIME(bool cancelCompositionString)
{
if (imeState.HwndSource == null)
{
return;
}
if (cancelCompositionString)
{
CancelCompositionString();
}
ImeState.ImmAssociateContext(imeState.HwndSource.Handle, imeState.OldContext);
ImeState.ImmReleaseContext(imeState.HWND, imeState.Context);
imeState.HwndSource.RemoveHook(WndProc);
imeState.Clear();
textCaretLayer.SetImeStarted(false);
}