private BlockState TryParseSetexHeading(BlockProcessor state, Block block)
{
var paragraph = (ParagraphBlock)block;
var headingChar = (char)0;
bool checkForSpaces = false;
var line = state.Line;
var c = line.CurrentChar;
while (c != '\0')
{
if (headingChar == 0)
{
if (c == '=' || c == '-')
{
headingChar = c;
continue;
}
break;
}
if (checkForSpaces)
{
if (!c.IsSpaceOrTab())
{
headingChar = (char)0;
break;
}
}
else if (c != headingChar)
{
if (c.IsSpaceOrTab())
{
checkForSpaces = true;
}
else
{
headingChar = (char)0;
break;
}
}
c = line.NextChar();
}
if (headingChar != 0)
{
// We dicard the paragraph that will be transformed to a heading
state.Discard(paragraph);
// If we matched a LinkReferenceDefinition before matching the heading, and the remaining
// lines are empty, we can early exit and remove the paragraph
if (!(TryMatchLinkReferenceDefinition(ref paragraph.Lines, state) && paragraph.Lines.Count == 0))
{
var level = headingChar == '=' ? 1 : 2;
var heading = new HeadingBlock(this)
{
Column = paragraph.Column,
Span = new SourceSpan(paragraph.Span.Start, line.Start),
Level = level,
Lines = paragraph.Lines,
};
heading.Lines.Trim();
// Remove the paragraph as a pending block
state.NewBlocks.Push(heading);
}
return(BlockState.BreakDiscard);
}
block.Span.End = state.Line.End;
return(BlockState.Continue);
}