private void IMENotify(int WParam)
{
switch (WParam)
{
case IMM.ImnSetOpenStatus:
_context = IMM.ImmGetContext(Handle);
IsIMEOpen = IMM.ImmGetOpenStatus(_context);
System.Diagnostics.Trace.WriteLine(string.Format("IsIMEOpen: {0}", IsIMEOpen ? "True" : "False"));
break;
case IMM.ImnOpenCandidate:
case IMM.ImnChangeCandidate:
IMEChangeCandidate();
break;
case IMM.ImnCloseCandidate:
IMECloseCandidate();
break;
case IMM.ImnPrivate:
break;
default:
break;
}
}
/// <summary>
/// Disable the IME
/// </summary>
public void DisableIME()
{
IsEnabled = false;
IMM.DestroyCaret();
IMM.ImmAssociateContext(Handle, IntPtr.Zero);
}
protected override void WndProc(ref Message msg)
{
switch (msg.Msg)
{
case IMM.ImeSetContext:
if (msg.WParam.ToInt32() == 1)
{
if (IsEnabled)
{
EnableIME();
}
if (!_showIMEWin)
{
msg.LParam = (IntPtr)0;
}
}
break;
case IMM.InputLanguageChange:
return;
case IMM.ImeNotify:
IMENotify(msg.WParam.ToInt32());
if (!_showIMEWin)
{
return;
}
break;
case IMM.ImeStartCompostition:
IMEStartComposion(msg.LParam.ToInt32());
return;
case IMM.ImeComposition:
IMESetContextForAll();
IMEComposition(msg.LParam.ToInt32());
IMM.ImmReleaseContext(Handle, _context);
break;
case IMM.ImeEndComposition:
IMESetContextForAll();
IMEEndComposition(msg.LParam.ToInt32());
IMM.ImmReleaseContext(Handle, _context);
if (!_showIMEWin)
{
return;
}
break;
case IMM.Char:
CharEvent(msg.WParam.ToInt32());
break;
}
base.WndProc(ref msg);
}
public void SetTextInputRect(ref Rectangle rect)
{
_context = IMM.ImmGetContext(Handle);
var candidateForm = new IMM.CandidateForm(new IMM.Point(rect.X, rect.Y));
IMM.ImmSetCandidateWindow(_context, ref candidateForm);
IMM.SetCaretPos(rect.X, rect.Y);
IMM.ImmReleaseContext(Handle, _context);
}
private void IMESetContextForAll()
{
_context = IMM.ImmGetContext(Handle);
_compcurpos.IMEHandle = _context;
_compstr.IMEHandle = _context;
_compclause.IMEHandle = _context;
_compattr.IMEHandle = _context;
_compread.IMEHandle = _context;
_compreadclause.IMEHandle = _context;
_compreadattr.IMEHandle = _context;
_resstr.IMEHandle = _context;
_resclause.IMEHandle = _context;
_resread.IMEHandle = _context;
_resreadclause.IMEHandle = _context;
}
internal override void Update()
{
Length = IMM.ImmGetCompositionString(IMEHandle, Flag, IntPtr.Zero, 0);
IntPtr pointer = Marshal.AllocHGlobal(Length);
try
{
IMM.ImmGetCompositionString(IMEHandle, Flag, pointer, Length);
_values = new byte[Length];
Marshal.Copy(pointer, _values, 0, Length);
}
finally
{
Marshal.FreeHGlobal(pointer);
}
}
private void CharEvent(int wParam)
{
var charInput = (char)wParam;
var key = Microsoft.Xna.Framework.Input.Keys.None;
if (!char.IsSurrogate(charInput))
{
key = (Microsoft.Xna.Framework.Input.Keys)(IMM.VkKeyScanEx(charInput, InputLanguage.CurrentInputLanguage.Handle) & 0xff);
}
_imeHandler.OnTextInput(charInput, key);
if (IsEnabled)
{
IMECloseCandidate();
}
}
/// <summary>
/// Enable the IME
/// </summary>
public void EnableIME()
{
IsEnabled = true;
IMM.DestroyCaret();
IMM.CreateCaret(Handle, IntPtr.Zero, 1, 1);
_context = IMM.ImmGetContext(Handle);
if (_context != IntPtr.Zero)
{
IMM.ImmAssociateContext(Handle, _context);
IMM.ImmReleaseContext(Handle, _context);
return;
}
// This fix the bug that _context is 0 on fullscreen mode.
ImeContext.Enable(Handle);
}
private void IMEChangeCandidate()
{
_context = IMM.ImmGetContext(Handle);
uint length = IMM.ImmGetCandidateList(_context, 0, IntPtr.Zero, 0);
if (length > 0)
{
IntPtr pointer = Marshal.AllocHGlobal((int)length);
length = IMM.ImmGetCandidateList(_context, 0, pointer, length);
IMM.CandidateList cList = (IMM.CandidateList)Marshal.PtrToStructure(pointer, typeof(IMM.CandidateList));
CandidatesSelection = cList.dwSelection;
CandidatesPageStart = cList.dwPageStart;
CandidatesPageSize = cList.dwPageSize;
if (cList.dwCount > 1)
{
Candidates = new string[cList.dwCount];
for (int i = 0; i < cList.dwCount; i++)
{
int sOffset = Marshal.ReadInt32(pointer, 24 + 4 * i);
Candidates[i] = Marshal.PtrToStringUni(pointer + sOffset);
}
_imeHandler.OnTextComposition(CompositionString, CompositionCursorPos, new CandidateList {
Candidates = Candidates,
CandidatesPageStart = CandidatesPageStart,
CandidatesPageSize = CandidatesPageSize,
CandidatesSelection = CandidatesSelection
});
}
else
{
IMECloseCandidate();
}
Marshal.FreeHGlobal(pointer);
}
IMM.ImmReleaseContext(Handle, _context);
}
internal override void Update()
{
Value = IMM.ImmGetCompositionString(IMEHandle, Flag, IntPtr.Zero, 0);
}