public int Find(char[] characterSet, int start, int end)
{
System.Windows.Forms.NativeMethods.CHARRANGE charrange;
bool flag = true;
bool negate = false;
int textLength = this.TextLength;
if (characterSet == null)
{
throw new ArgumentNullException("characterSet");
}
if ((start < 0) || (start > textLength))
{
throw new ArgumentOutOfRangeException("start", System.Windows.Forms.SR.GetString("InvalidBoundArgument", new object[] { "start", start, 0, textLength }));
}
if ((end < start) && (end != -1))
{
throw new ArgumentOutOfRangeException("end", System.Windows.Forms.SR.GetString("InvalidLowBoundArgumentEx", new object[] { "end", end, "start" }));
}
if (characterSet.Length == 0)
{
return -1;
}
int windowTextLength = System.Windows.Forms.SafeNativeMethods.GetWindowTextLength(new HandleRef(this, base.Handle));
if (start == end)
{
start = 0;
end = windowTextLength;
}
if (end == -1)
{
end = windowTextLength;
}
charrange = new System.Windows.Forms.NativeMethods.CHARRANGE {
cpMax = charrange.cpMin = start
};
System.Windows.Forms.NativeMethods.TEXTRANGE lParam = new System.Windows.Forms.NativeMethods.TEXTRANGE {
chrg = new System.Windows.Forms.NativeMethods.CHARRANGE()
};
lParam.chrg.cpMin = charrange.cpMin;
lParam.chrg.cpMax = charrange.cpMax;
System.Windows.Forms.UnsafeNativeMethods.CharBuffer buffer = System.Windows.Forms.UnsafeNativeMethods.CharBuffer.CreateBuffer(0x201);
lParam.lpstrText = buffer.AllocCoTaskMem();
if (lParam.lpstrText == IntPtr.Zero)
{
throw new OutOfMemoryException();
}
try
{
bool flag3 = false;
while (!flag3)
{
if (flag)
{
lParam.chrg.cpMin = charrange.cpMax;
lParam.chrg.cpMax += 0x200;
}
else
{
lParam.chrg.cpMax = charrange.cpMin;
lParam.chrg.cpMin -= 0x200;
if (lParam.chrg.cpMin < 0)
{
lParam.chrg.cpMin = 0;
}
}
if (end != -1)
{
lParam.chrg.cpMax = Math.Min(lParam.chrg.cpMax, end);
}
int num3 = (int) System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x44b, 0, lParam);
if (num3 == 0)
{
charrange.cpMax = charrange.cpMin = -1;
goto Label_02F4;
}
buffer.PutCoTaskMem(lParam.lpstrText);
string str = buffer.GetString();
if (flag)
{
for (int i = 0; i < num3; i++)
{
if (this.GetCharInCharSet(str[i], characterSet, negate))
{
flag3 = true;
continue;
}
charrange.cpMax++;
}
}
else
{
int num5 = num3;
while (num5-- != 0)
{
if (this.GetCharInCharSet(str[num5], characterSet, negate))
{
flag3 = true;
continue;
}
charrange.cpMin--;
}
}
}
}
finally
{
if (lParam.lpstrText != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(lParam.lpstrText);
}
}
Label_02F4:
return (flag ? charrange.cpMax : charrange.cpMin);
}
public int Find(string str, int start, int end, RichTextBoxFinds options)
{
int textLength = this.TextLength;
if (str == null)
{
throw new ArgumentNullException("str");
}
if ((start < 0) || (start > textLength))
{
throw new ArgumentOutOfRangeException("start", System.Windows.Forms.SR.GetString("InvalidBoundArgument", new object[] { "start", start, 0, textLength }));
}
if (end < -1)
{
throw new ArgumentOutOfRangeException("end", System.Windows.Forms.SR.GetString("RichTextFindEndInvalid", new object[] { end }));
}
bool flag = true;
System.Windows.Forms.NativeMethods.FINDTEXT lParam = new System.Windows.Forms.NativeMethods.FINDTEXT {
chrg = new System.Windows.Forms.NativeMethods.CHARRANGE(),
lpstrText = str
};
if (end == -1)
{
end = textLength;
}
if (start > end)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("RichTextFindEndInvalid", new object[] { end }));
}
if ((options & RichTextBoxFinds.Reverse) != RichTextBoxFinds.Reverse)
{
lParam.chrg.cpMin = start;
lParam.chrg.cpMax = end;
}
else
{
lParam.chrg.cpMin = end;
lParam.chrg.cpMax = start;
}
if (lParam.chrg.cpMin == lParam.chrg.cpMax)
{
if ((options & RichTextBoxFinds.Reverse) != RichTextBoxFinds.Reverse)
{
lParam.chrg.cpMin = 0;
lParam.chrg.cpMax = -1;
}
else
{
lParam.chrg.cpMin = textLength;
lParam.chrg.cpMax = 0;
}
}
int wParam = 0;
if ((options & RichTextBoxFinds.WholeWord) == RichTextBoxFinds.WholeWord)
{
wParam |= 2;
}
if ((options & RichTextBoxFinds.MatchCase) == RichTextBoxFinds.MatchCase)
{
wParam |= 4;
}
if ((options & RichTextBoxFinds.NoHighlight) == RichTextBoxFinds.NoHighlight)
{
flag = false;
}
if ((options & RichTextBoxFinds.Reverse) != RichTextBoxFinds.Reverse)
{
wParam |= 1;
}
int startIndex = (int) System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x438, wParam, lParam);
if ((startIndex != -1) && flag)
{
System.Windows.Forms.NativeMethods.CHARRANGE charrange = new System.Windows.Forms.NativeMethods.CHARRANGE {
cpMin = startIndex
};
char ch = 'ـ';
string text = this.Text;
int index = text.Substring(startIndex, str.Length).IndexOf(ch);
if (index == -1)
{
charrange.cpMax = startIndex + str.Length;
}
else
{
int num5 = index;
int num6 = startIndex + index;
while (num5 < str.Length)
{
while ((text[num6] == ch) && (str[num5] != ch))
{
num6++;
}
num5++;
num6++;
}
charrange.cpMax = num6;
}
System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x437, 0, charrange);
base.SendMessage(0xb7, 0, 0);
}
return startIndex;
}
private void StreamIn(Stream data, int flags)
{
if ((flags & 0x8000) == 0)
{
System.Windows.Forms.NativeMethods.CHARRANGE lParam = new System.Windows.Forms.NativeMethods.CHARRANGE();
System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x437, 0, lParam);
}
try
{
this.editStream = data;
if ((flags & 2) != 0)
{
long position = this.editStream.Position;
byte[] buffer = new byte[SZ_RTF_TAG.Length];
this.editStream.Read(buffer, (int) position, SZ_RTF_TAG.Length);
string str = Encoding.Default.GetString(buffer);
if (!SZ_RTF_TAG.Equals(str))
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("InvalidFileFormat"));
}
this.editStream.Position = position;
}
int num2 = 0;
System.Windows.Forms.NativeMethods.EDITSTREAM es = new System.Windows.Forms.NativeMethods.EDITSTREAM();
if ((flags & 0x10) != 0)
{
num2 = 9;
}
else
{
num2 = 5;
}
if ((flags & 2) != 0)
{
num2 |= 0x40;
}
else
{
num2 |= 0x10;
}
es.dwCookie = (IntPtr) num2;
es.pfnCallback = new System.Windows.Forms.NativeMethods.EditStreamCallback(this.EditStreamProc);
base.SendMessage(0x435, 0, 0x7fffffff);
if (IntPtr.Size == 8)
{
System.Windows.Forms.NativeMethods.EDITSTREAM64 editstream2 = this.ConvertToEDITSTREAM64(es);
System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x449, flags, editstream2);
es.dwError = this.GetErrorValue64(editstream2);
}
else
{
System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x449, flags, es);
}
this.UpdateMaxLength();
if (!this.GetProtectedError())
{
if (es.dwError != 0)
{
throw new InvalidOperationException(System.Windows.Forms.SR.GetString("LoadTextError"));
}
base.SendMessage(0xb9, -1, 0);
base.SendMessage(0xba, 0, 0);
}
}
finally
{
this.editStream = null;
}
}
