private void RefreshHighlight()
{
List <Run> runs = new List <Run>();
if (DisplayString != null && HighlightString != null)
{
string displayStringLower = DisplayString.ToLower();
string highlightStringLower = HighlightString.ToLower().Trim();
int highlightStartIndex = displayStringLower.IndexOf(highlightStringLower);
if (highlightStartIndex > 0)
{
runs.Add(GenerateRun(DisplayString.Substring(0, highlightStartIndex)));
runs.Add(GenerateRun(DisplayString.Substring(highlightStartIndex, highlightStringLower.Length), true));
if (highlightStartIndex + highlightStringLower.Length <= DisplayString.Length)
{
runs.Add(GenerateRun(DisplayString.Substring(highlightStartIndex + highlightStringLower.Length, DisplayString.Length - highlightStartIndex - highlightStringLower.Length)));
}
}
else if (highlightStartIndex == 0)
{
runs.Add(GenerateRun(DisplayString.Substring(0, highlightStringLower.Length), true));
if (highlightStringLower.Length + highlightStartIndex < displayStringLower.Length)
{
runs.Add(GenerateRun(DisplayString.Substring(highlightStringLower.Length, DisplayString.Length - highlightStringLower.Length)));
}
}
}
runsToRender = runs;
}
private int FindPrecedingWordEnd()
{
if (_cursorIndex == 0)
{
return(_cursorIndex);
}
var isOnWhitespace = char.IsWhiteSpace(DisplayString[_cursorIndex - 1]);
return(DisplayString.Substring(0, _cursorIndex).ToList()
.FindLastIndex(a => char.IsWhiteSpace(a) != isOnWhitespace) + 1);
}
public void AddString(string text)
{
if (_selectionActive)
{
DeleteSelected();
}
DisplayString = DisplayString.Insert(_cursorIndex, text);
DisplayString = DisplayString.Substring(0, Math.Min(2500, DisplayString.Length));
_cursorIndex += text.Length;
ClampCursor();
}
private int FindFollowingWordEnd()
{
if (_cursorIndex == DisplayString.Length)
{
return(_cursorIndex);
}
var isOnWhitespace = char.IsWhiteSpace(DisplayString[_cursorIndex]);
var foundIndex = DisplayString.Substring(_cursorIndex).ToList()
.FindIndex(a => char.IsWhiteSpace(a) != isOnWhitespace);
if (foundIndex == -1)
{
return(DisplayString.Length);
}
return(_cursorIndex + foundIndex);
}