/// <summary>
/// Attempts to parse a superscript text span.
/// </summary>
/// <param name="markdown"> The markdown text. </param>
/// <param name="start"> The location to start parsing. </param>
/// <param name="maxEnd"> The location to stop parsing. </param>
/// <returns> A parsed superscript text span, or <c>null</c> if this is not a superscript text span. </returns>
internal static InlineParseResult Parse(string markdown, int start, int maxEnd)
{
// Check the first character.
if (start == maxEnd || markdown[start] != '^')
{
return(null);
}
// The content might be enclosed in parentheses.
int innerStart = start + 1;
int innerEnd, end;
if (innerStart < maxEnd && markdown[innerStart] == '(')
{
// Find the end parenthesis.
innerStart++;
innerEnd = Common.IndexOf(markdown, ')', innerStart, maxEnd);
if (innerEnd == -1)
{
return(null);
}
end = innerEnd + 1;
}
else
{
// Search for the next whitespace character.
innerEnd = Common.FindNextWhiteSpace(markdown, innerStart, maxEnd, ifNotFoundReturnLength: true);
if (innerEnd == innerStart)
{
// No match if the character after the caret is a space.
return(null);
}
end = innerEnd;
}
// We found something!
var result = new SuperscriptTextInline();
result.Inlines = Common.ParseInlineChildren(markdown, innerStart, innerEnd);
return(new InlineParseResult(result, start, end));
}
/// <summary>
/// Attempts to parse a superscript text span.
/// </summary>
/// <param name="markdown"> The markdown text. </param>
/// <param name="start"> The location to start parsing. </param>
/// <param name="maxEnd"> The location to stop parsing. </param>
/// <returns> A parsed superscript text span, or <c>null</c> if this is not a superscript text span. </returns>
internal static InlineParseResult Parse(string markdown, int start, int maxEnd)
{
// Check the first character.
bool isHTMLSequence = false;
if (start == maxEnd || (markdown[start] != '^' && markdown[start] != '<'))
{
return(null);
}
if (markdown[start] != '^')
{
if (maxEnd - start < 5)
{
return(null);
}
else if (markdown.Substring(start, 5) != "<sup>")
{
return(null);
}
else
{
isHTMLSequence = true;
}
}
if (isHTMLSequence)
{
int innerStart = start + 5;
int innerEnd, end;
innerEnd = Common.IndexOf(markdown, "</sup>", innerStart, maxEnd);
if (innerEnd == -1)
{
return(null);
}
if (innerEnd == innerStart)
{
return(null);
}
if (ParseHelpers.IsMarkdownWhiteSpace(markdown[innerStart]) || ParseHelpers.IsMarkdownWhiteSpace(markdown[innerEnd - 1]))
{
return(null);
}
// We found something!
end = innerEnd + 6;
var result = new SuperscriptTextInline();
result.Inlines = Common.ParseInlineChildren(markdown, innerStart, innerEnd);
return(new InlineParseResult(result, start, end));
}
else
{
// The content might be enclosed in parentheses.
int innerStart = start + 1;
int innerEnd, end;
if (innerStart < maxEnd && markdown[innerStart] == '(')
{
// Find the end parenthesis.
innerStart++;
innerEnd = Common.IndexOf(markdown, ')', innerStart, maxEnd);
if (innerEnd == -1)
{
return(null);
}
end = innerEnd + 1;
}
else
{
// Search for the next whitespace character.
innerEnd = Common.FindNextWhiteSpace(markdown, innerStart, maxEnd, ifNotFoundReturnLength: true);
if (innerEnd == innerStart)
{
// No match if the character after the caret is a space.
return(null);
}
end = innerEnd;
}
// We found something!
var result = new SuperscriptTextInline();
result.Inlines = Common.ParseInlineChildren(markdown, innerStart, innerEnd);
return(new InlineParseResult(result, start, end));
}
}
