/// <summary>
// Construct a TextCompositionEventArgs with composition infos.
/// </summary>
public IMETextCompositionEventArgs(IMEString compositionText,
int cursorPosition,
IMEString[] candidateList = null,
int candidatePageStart = 0,
int candidatePageSize = 0,
int candidateSelection = 0)
{
CompositionText = compositionText;
CursorPosition = cursorPosition;
CandidateList = candidateList;
CandidatePageStart = candidatePageStart;
CandidatePageSize = candidatePageSize;
CandidateSelection = candidateSelection;
}
// On text composition update.
internal static void OnTextComposition(object sender, IMEString compositionText, int cursorPos)
{
if (compositionText.Count == 0) // Crash guard
{
cursorPos = 0;
}
if (cursorPos > compositionText.Count) // Another crash guard
{
cursorPos = compositionText.Count;
}
if (TextComposition != null)
{
TextComposition.Invoke(sender,
new IMETextCompositionEventArgs(compositionText, cursorPos, CandidateList, CandidatePageStart, CandidatePageSize, CandidateSelection));
}
if (TextCompositionCallback != null)
{
TextCompositionCallback(compositionText, cursorPos, CandidateList, CandidatePageStart, CandidatePageSize, CandidateSelection);
}
}
private void UpdateCandidates()
{
uint length = NativeMethods.ImmGetCandidateList(DefaultImc, 0, IntPtr.Zero, 0);
if (length > 0)
{
IntPtr pointer = Marshal.AllocHGlobal((int)length);
length = NativeMethods.ImmGetCandidateList(DefaultImc, 0, pointer, length);
NativeMethods.CANDIDATELIST cList = Marshal.PtrToStructure <NativeMethods.CANDIDATELIST>(pointer);
var selection = (int)cList.dwSelection;
var pageStart = (int)cList.dwPageStart;
var pageSize = (int)cList.dwPageSize;
IMEString[] candidates = ArrayPool <IMEString> .Shared.Rent(pageSize);
int i, j;
for (i = pageStart, j = 0; i < cList.dwCount && j < pageSize; i++, j++)
{
int sOffset = Marshal.ReadInt32(pointer, 24 + 4 * i);
candidates[j] = new IMEString(pointer + sOffset);
}
//Debug.WriteLine("IMM========IMM");
//Debug.WriteLine("pageStart: {0}, pageSize: {1}, selection: {2}, candidates:", pageStart, pageSize, selection);
//for (int k = 0; k < candidates.Length; k++)
// Debug.WriteLine(" {2}{0}.{1}", k + 1, candidates[k], k == selection ? "*" : "");
//Debug.WriteLine("IMM++++++++IMM");
InputMethod.CandidatePageStart = pageStart;
InputMethod.CandidatePageSize = pageSize;
InputMethod.CandidateSelection = selection;
InputMethod.CandidateList = candidates;
Marshal.FreeHGlobal(pointer);
}
}
private void OnUIElement(int uiElementId, bool onStart)
{
if (InputMethod.ShowOSImeWindow || !_supportUIElement)
{
return;
}
ITfUIElement uiElement;
TextServicesContext.Current.UIElementMgr.GetUIElement(uiElementId, out uiElement);
ITfCandidateListUIElementBehavior candList;
try
{
candList = uiElement.QueryInterface <ITfCandidateListUIElementBehavior>();
}
catch (SharpGenException)
{
_supportUIElement = false;
return;
}
finally
{
uiElement.Dispose();
}
uint selection = 0;
uint currentPage = 0;
uint count = 0;
uint pageCount = 0;
uint pageStart = 0;
uint pageSize = 0;
uint i, j;
candList.GetSelection(out selection);
candList.GetCurrentPage(out currentPage);
candList.GetCount(out count);
// Limit max candidate count to 100, or candList.GetString() would crash.
// Don't know why???
if (count > MaxCandidateCount)
{
count = MaxCandidateCount;
}
candList.GetPageIndex(null, 0, out pageCount);
if (pageCount > 0)
{
uint[] pageStartIndexes = ArrayPool <uint> .Shared.Rent((int)pageCount);
candList.GetPageIndex(pageStartIndexes, pageCount, out pageCount);
pageStart = pageStartIndexes[currentPage];
if (pageStart >= count - 1)
{
candList.Abort();
ArrayPool <uint> .Shared.Return(pageStartIndexes);
return;
}
if (currentPage < pageCount - 1)
{
pageSize = Math.Min(count, pageStartIndexes[currentPage + 1]) - pageStart;
}
else
{
pageSize = count - pageStart;
}
ArrayPool <uint> .Shared.Return(pageStartIndexes);
}
selection -= pageStart;
IMEString[] candidates = _IMEStringPool.Rent((int)pageSize);
IntPtr bStrPtr;
for (i = pageStart, j = 0; i < count && j < pageSize; i++, j++)
{
candList.GetString(i, out bStrPtr);
candidates[j] = new IMEString(bStrPtr);
}
//Debug.WriteLine("TSF========TSF");
//Debug.WriteLine("pageStart: {0}, pageSize: {1}, selection: {2}, currentPage: {3} candidates:", pageStart, pageSize, selection, currentPage);
//for (int k = 0; k < candidates.Length; k++)
// Debug.WriteLine(" {2}{0}.{1}", k + 1, candidates[k], k == selection ? "*" : "");
//Debug.WriteLine("TSF++++++++TSF");
InputMethod.CandidatePageStart = (int)pageStart;
InputMethod.CandidatePageSize = (int)pageSize;
InputMethod.CandidateSelection = (int)selection;
InputMethod.CandidateList = candidates;
if (_currentComposition != null)
{
InputMethod.OnTextComposition(this, new IMEString(_currentComposition), _acpEnd);
_IMEStringPool.Return(candidates);
}
candList.Dispose();
}
public Enumerator(IMEString imeString)
{
_imeString = imeString;
_currentCharacter = '\0';
_currentIndex = -1;
}