# A markdown list block.
# Can be either an ordered or unordered list, this class is mainly used to factorize code.
abstract class BlockList
	super Block

	# Split list block into list items sub-blocks.
	private fun init_block(v: MarkdownProcessor) do
		var line = block.first_line
		if line == null then return
		line = line.next
		while line != null do
			var t = v.line_kind(line)
			if t isa LineList or
			   (not line.is_empty and (line.prev_empty and line.leading == 0 and
			   not (t isa LineList))) then
				   var sblock = block.split(line.prev.as(not null))
				   sblock.kind = new BlockListItem(sblock)
			end
			line = line.next
		end
		var sblock = block.split(block.last_line.as(not null))
		sblock.kind = new BlockListItem(sblock)
	end

	# Expand list items as paragraphs if needed.
	private fun expand_paragraphs(block: MDBlock) do
		var outer = block.first_block
		var inner: nullable MDBlock
		var has_paragraph = false
		while outer != null and not has_paragraph do
			if outer.kind isa BlockListItem then
				inner = outer.first_block
				while inner != null and not has_paragraph do
					if inner.kind isa BlockParagraph then
						has_paragraph = true
					end
					inner = inner.next
				end
			end
			outer = outer.next
		end
		if has_paragraph then
			outer = block.first_block
			while outer != null do
				if outer.kind isa BlockListItem then
					inner = outer.first_block
					while inner != null do
						if inner.kind isa BlockNone then
							inner.kind = new BlockParagraph(inner)
						end
						inner = inner.next
					end
				end
				outer = outer.next
			end
		end
	end
end