public abstract TResult Visit(FormatTextElement format);
private static FormatElement Parse(string format, ref int index, params char[] stopat)
{
FormatElement element = FormatNoContentElement.Element;
while (index < format.Length)
{
switch (format[index])
{
case '[': // Coloring
element += ParseColor(format, ref index);
break;
case '?': // Conditional
element += ParseCondition(format, ref index);
break;
case '@': // Listing/Function
element += ParseFunction(format, ref index);
break;
case '$': // Variable
element += ParseVariable(format, ref index);
break;
case '\\':
if (format.Length == index + 1)
{
index++;
}
else
{
element += new FormatTextElement(format.Substring(index + 1, 1));
index += 2;
}
break;
default: // Skip content
var nextIndex = format.IndexOfAny(new char[] { '[', '?', '@', '$', '\\' }, index);
if (nextIndex < 0)
{
nextIndex = format.Length;
}
var stopatIndex = format.IndexOfAny(stopat, index);
if (stopatIndex < nextIndex && stopatIndex >= 0)
{
if (stopatIndex - index > 0)
{
element += new FormatTextElement(format.Substring(index, stopatIndex - index));
index = stopatIndex;
}
return(element);
}
else
{
element += new FormatTextElement(format.Substring(index, nextIndex - index));
index = nextIndex;
}
break;
}
}
return(element);
}