ImeHelper.cs

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namespace Dreamine.UI.Wpf.Equipment.DreamineVirtualKeyboard;

public static class ImeHelper
{
    private const uint IME_CMODE_NATIVE = 0x0001;

    public static bool GetImeMode()
    {
        IntPtr hwnd = Win32Api.GetForegroundWindow();
        IntPtr hIMC = Win32Api.ImmGetContext(hwnd);
 
        if (hIMC == IntPtr.Zero)
            return false;
 
        bool isOpen = Win32Api.ImmGetOpenStatus(hIMC);
        if (!isOpen)
        {
            Win32Api.ImmReleaseContext(hwnd, hIMC);
            return false;
        }
 
        Win32Api.ImmGetConversionStatus(hIMC, out uint conv, out _);
        Win32Api.ImmReleaseContext(hwnd, hIMC);
 
        return (conv & IME_CMODE_NATIVE) != 0
            ? true
            : false;
    }

    public static bool SetImeMode(bool native)
    {
        IntPtr hwnd = Win32Api.GetForegroundWindow();
        IntPtr hIMC = Win32Api.ImmGetContext(hwnd);
 
        if (hIMC == IntPtr.Zero)
            return false;
 
        try
        {
            Win32Api.ImmSetOpenStatus(hIMC, native);
 
            if (Win32Api.ImmGetConversionStatus(hIMC, out uint conv, out uint sentence))
            {
                conv = native ? conv | IME_CMODE_NATIVE : conv & ~IME_CMODE_NATIVE;
                Win32Api.ImmSetConversionStatus(hIMC, conv, sentence);
            }
 
            return true;
        }
        finally
        {
            Win32Api.ImmReleaseContext(hwnd, hIMC);
        }
    }
}