public IXLFormattedText <T> Substring(Int32 index, Int32 length)
{
if (index + 1 > Length || (Length - index + 1) < length || length <= 0)
{
throw new IndexOutOfRangeException("Index and length must refer to a location within the string.");
}
List <IXLRichString> newRichTexts = new List <IXLRichString>();
var retVal = new XLFormattedText <T>(_defaultFont);
Int32 lastPosition = 0;
foreach (var rt in _richTexts)
{
if (lastPosition >= index + 1 + length) // We already have what we need
{
newRichTexts.Add(rt);
}
else if (lastPosition + rt.Text.Length >= index + 1) // Eureka!
{
Int32 startIndex = index - lastPosition;
if (startIndex > 0)
{
newRichTexts.Add(new XLRichString(rt.Text.Substring(0, startIndex), rt, this));
}
else if (startIndex < 0)
{
startIndex = 0;
}
Int32 leftToTake = length - retVal.Length;
if (leftToTake > rt.Text.Length - startIndex)
{
leftToTake = rt.Text.Length - startIndex;
}
XLRichString newRt = new XLRichString(rt.Text.Substring(startIndex, leftToTake), rt, this);
newRichTexts.Add(newRt);
retVal.AddText(newRt);
if (startIndex + leftToTake < rt.Text.Length)
{
newRichTexts.Add(new XLRichString(rt.Text.Substring(startIndex + leftToTake), rt, this));
}
}
else // We haven't reached the desired position yet
{
newRichTexts.Add(rt);
}
lastPosition += rt.Text.Length;
}
_richTexts = newRichTexts;
return(retVal);
}
public XLRichText(XLFormattedText <IXLRichText> defaultRichText, IXLFontBase defaultFont)
: base(defaultRichText, defaultFont)
{
Container = this;
}
public XLComment(XLCell cell, XLFormattedText <IXLComment> defaultComment, IXLFontBase defaultFont)
: base(defaultComment, defaultFont)
{
Initialize(cell);
}
public XLComment(XLCell cell, XLFormattedText <IXLComment> defaultComment, IXLFontBase defaultFont, IXLDrawingStyle style)
: base(defaultComment, defaultFont)
{
Initialize(cell, style);
}
