public override BlockState TryOpen(BlockProcessor processor)
{
// We expect no indentation for a figure block.
if (processor.IsCodeIndent)
{
return(BlockState.None);
}
// Match fenced char
int count = 0;
var column = processor.Column;
var line = processor.Line;
var startPosition = line.Start;
char c = line.CurrentChar;
var matchChar = c;
while (c != '\0')
{
if (c != matchChar)
{
break;
}
count++;
c = line.NextChar();
}
// Requires at least 3 opening chars
if (count < 3)
{
return(BlockState.None);
}
var figure = new Figure(this)
{
Span = new SourceSpan(startPosition, line.End),
Line = processor.LineIndex,
Column = processor.Column,
OpeningCharacter = matchChar,
OpeningCharacterCount = count
};
line.TrimStart();
if (!line.IsEmpty)
{
var caption = new FigureCaption(this)
{
Span = new SourceSpan(line.Start, line.End),
Line = processor.LineIndex,
Column = column + line.Start - startPosition,
IsOpen = false
};
caption.AppendLine(ref line, caption.Column, processor.LineIndex, processor.CurrentLineStartPosition);
figure.Add(caption);
}
processor.NewBlocks.Push(figure);
// Discard the current line as it is already parsed
return(BlockState.ContinueDiscard);
}
public override BlockState TryContinue(BlockProcessor processor, Block block)
{
var figure = (Figure)block;
var count = figure.OpeningCharacterCount;
var matchChar = figure.OpeningCharacter;
var c = processor.CurrentChar;
var column = processor.Column;
// Match if we have a closing fence
var line = processor.Line;
var startPosition = line.Start;
while (c == matchChar)
{
c = line.NextChar();
count--;
}
// If we have a closing fence, close it and discard the current line
// The line must contain only fence opening character followed only by whitespaces.
if (count <= 0 && !processor.IsCodeIndent)
{
line.TrimStart();
if (!line.IsEmpty)
{
var caption = new FigureCaption(this)
{
Span = new SourceSpan(line.Start, line.End),
Line = processor.LineIndex,
Column = column + line.Start - startPosition,
IsOpen = false
};
caption.AppendLine(ref line, caption.Column, processor.LineIndex, processor.CurrentLineStartPosition);
figure.Add(caption);
}
figure.Span.End = line.End;
// Don't keep the last line
return(BlockState.BreakDiscard);
}
// Reset the indentation to the column before the indent
processor.GoToColumn(processor.ColumnBeforeIndent);
figure.Span.End = line.End;
return(BlockState.Continue);
}