public Queue <HighlightedText> Compute(string origText, IList <HighlightDetail> details)
{
Queue <HighlightedText> textSections = new Queue <HighlightedText>();
int lastIndex = 0;
foreach (HighlightDetail highlight in details.OrderBy(d => d.IndexStart))
{
//if the lastIndex is equal to the index start then we don't need to add an
//unformatted block because the highlight starts right away
if (lastIndex != highlight.IndexStart)
{
HighlightedText nextUnformattedBlock = new HighlightedText()
{
Text = origText.Substring(lastIndex, highlight.IndexStart - lastIndex),
HighlightType = HighlightType.Normal
};
textSections.Enqueue(nextUnformattedBlock);
}
//for extra characters
HighlightedText formattedBlock = new HighlightedText()
{
HighlightType = highlight.HighlightType
};
if (highlight.HighlightType == HighlightType.ExtraChars)
{
formattedBlock.Text = string.Empty.PadLeft(highlight.IndexEnd - highlight.IndexStart, '+');
lastIndex = highlight.IndexStart;
}
else
{
formattedBlock.Text = origText.Substring(highlight.IndexStart, highlight.IndexEnd - highlight.IndexStart);
lastIndex = highlight.IndexEnd;
}
textSections.Enqueue(formattedBlock);
}
//if the last index is greater or equal to the original texts length
//then the last formatted block went to the end of the string
//or over in the case of extra chars
if (lastIndex < origText.Length)
{
HighlightedText lastUnformattedBlock = new HighlightedText()
{
Text = origText.Substring(lastIndex, origText.Length - lastIndex),
HighlightType = HighlightType.Normal
};
textSections.Enqueue(lastUnformattedBlock);
}
return(textSections);
}
public bool Equals(HighlightedText obj)
{
return(this.Text == obj.Text &&
this.HighlightType == obj.HighlightType);
}