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require 'ffi'
module CMark
extend FFI::Library
ffi_lib ['libcmark', 'cmark']
typedef :pointer, :node
enum :node_type, [:document, :blockquote, :list, :list_item,
:fenced_code, :indented_code, :html, :paragraph,
:atx_header, :setext_header, :hrule, :reference_def,
:str, :softbreak, :linebreak, :code, :inline_html,
:emph, :strong, :link, :image]
enum :node_type, []
attach_function :cmark_markdown_to_html, [:string, :int], :string
attach_function :cmark_parse_document, [:string, :int], :node
attach_function :cmark_node_first_child, [:node], :node
attach_function :cmark_node_next, [:node], :node
attach_function :cmark_node_get_type, [:node], :node_type
end
def pointer_to_block(pointer)
if pointer.null?
raise NullPointer
else
node_type = CMark::cmark_node_get_type(pointer)
if node_type == 0 # document
children = []
b = CMark::cmark_node_first_child(pointer)
while !b.null?
children << pointer_to_block(b)
b = CMark::cmark_node_next(b)
end
return Document.new(children)
elsif node_type == 7 # paragraph
return Paragraph.new("TODO")
else
raise UnknownNodeType, node_type
end
end
end
class Block
def initialize
end
end
class Document < Block
attr_accessor :children
def initialize(children)
@children = children
end
end
class Paragraph < Block
def initialize(inlines)
@contents = "inlines" # TODO
end
def to_html
"<p>" + @contents + "</p>"
end
end
class Inline
end
def parse_markdown(s)
len = s.bytes.length
pointer_to_block(CMark::cmark_parse_document(s, len))
end
def markdown_to_html(s)
len = s.bytes.length
CMark::cmark_markdown_to_html(s, len)
end
doc = parse_markdown(STDIN.read())
doc.children.each do |b|
print(b)
end
# print markdown_to_html(STDIN.read())
|
