- 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]
- attach_function :cmark_free_nodes, [:node], :void
- attach_function :cmark_node_unlink, [:node], :void
- 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_parent, [:node], :node
- attach_function :cmark_node_next, [:node], :node
- attach_function :cmark_node_previous, [:node], :node
- attach_function :cmark_node_get_type, [:node], :node_type
- attach_function :cmark_node_get_string_content, [:node], :string
- class Node
- attr_accessor :type, :children, :string_content
- def initialize(pointer)
- if pointer.null?
- return nil
- end
- @pointer = pointer
- @type = CMark::cmark_node_get_type(pointer)
- @children = []
- first_child = CMark::cmark_node_first_child(pointer)
- b = first_child
- while !b.null?
- @children << Node.new(b)
- b = CMark::cmark_node_next(b)
- end
- @string_content = CMark::cmark_node_get_string_content(pointer)
- # Free?
- end
- def print
- printf("%s\n", self.type)
- if self.string_content
- printf("'%s'\n", self.string_content)
- end
- for child in self.children do
- child.print
- end
- end
- def self.from_markdown(s)
- len = s.bytes.length
- Node.new(CMark::cmark_parse_document(s, len))
- end
- end
- end
- doc = CMark::Node.from_markdown(STDIN.read())
- doc.print
- # def markdown_to_html(s)
- # len = s.bytes.length
- # CMark::cmark_markdown_to_html(s, len)
- # end
- # print markdown_to_html(STDIN.read())
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