public static int GetNorAlignCharOffsetAt(HCCanvas aCanvas, string aText, int x)
{
int Result = -1;
if (x < 0)
Result = 0;
else
{
int vLen = aText.Length;
int[] vCharWArr = new int[vLen];
SIZE vSize = new SIZE(0, 0);
aCanvas.GetTextExtentExPoint(aText, vLen, vCharWArr, ref vSize);
if (x > vSize.cx)
Result = vLen;
else
{
int i = 1;
while (i <= vLen)
{
#if UNPLACEHOLDERCHAR
i = HC.GetTextActualOffset(aText, i, true);
#endif
if (x == vCharWArr[i - 1])
{
Result = i;
break;
}
else
if (x > vCharWArr[i - 1])
i++;
else
{
if (x > HC.GetCharHalfFarfrom(
#if UNPLACEHOLDERCHAR
aText,
#endif
i, vCharWArr))
{
Result = i;
}
else
{
#if UNPLACEHOLDERCHAR
Result = HC.GetTextActualOffset(aText, i) - 1;
#else
Result = i - 1;
#endif
}
break;
}
}
}
}
return Result;
}