private void HighlightLinks()
{
string textContent;
this.Document.GetText(TextGetOptions.None, out textContent);
int start = 0;
int end = textContent.Length;
ITextRange range = this.Document.GetRange(start, end);
range.CharacterFormat.Underline = UnderlineType.None;
range.CharacterFormat.ForegroundColor = this.textForegroundColor;
if (this.Document.Selection == null)
{
return;
}
int startPosition = this.Document.Selection.StartPosition;
int endPosition = this.Document.Selection.EndPosition;
foreach (string uri in RegexHelper.FindUris(textContent))
{
int result = range.FindText(uri, end - start, FindOptions.None);
if (result > 0)
{
this.Document.Selection.SetRange(range.StartPosition, range.EndPosition);
range.CharacterFormat.Underline = UnderlineType.Single;
range.CharacterFormat.ForegroundColor = this.hyperlinkForegroundColor;
range.ScrollIntoView(PointOptions.None);
}
}
this.Document.Selection.SetRange(startPosition, endPosition);
}
public static void FastScrollToCaret(this TextBoxBase control)
{
if (control.IsHandleCreated)
{
var textLength = control.TextLength;
if (textLength == 0)
{
return;
}
bool flag = false;
object iunknown = null;
var iunkHandle = IntPtr.Zero;
try
{
if (SendMessage(new HandleRef(control, control.Handle), 1084, 0, out iunknown) != 0)
{
iunkHandle = Marshal.GetIUnknownForObject(iunknown);
if (iunkHandle != IntPtr.Zero)
{
var itextDocumentHandle = IntPtr.Zero;
var gUID = typeof(ITextDocument).GUID;
try
{
Marshal.QueryInterface(iunkHandle, ref gUID, out itextDocumentHandle);
var textDocument = Marshal.GetObjectForIUnknown(itextDocumentHandle) as ITextDocument;
if (textDocument != null)
{
int start = control.SelectionStart;
int lineFromCharIndex = control.GetLineFromCharIndex(start);
ITextRange textRange = textDocument.Range(textLength - 1, textLength - 1);
textRange.ScrollIntoView(0);
int num3 = (int)Win32.SendMessage(control.Handle, (Win32.WM) 206, IntPtr.Zero, IntPtr.Zero);
if (num3 > lineFromCharIndex)
{
textRange = textDocument.Range(start, start + control.SelectionLength);
textRange.ScrollIntoView(32);
}
flag = true;
}
}
finally
{
if (itextDocumentHandle != IntPtr.Zero)
{
Marshal.Release(itextDocumentHandle);
}
}
}
}
}
finally
{
if (iunkHandle != IntPtr.Zero)
{
Marshal.Release(iunkHandle);
}
}
if (!flag)
{
Win32.SendMessage(control.Handle, (Win32.WM) 183, IntPtr.Zero, IntPtr.Zero);
return;
}
}
else
{
control.ScrollToCaret();
}
}