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-rwxr-xr-xcommonmark.rb388
1 files changed, 0 insertions, 388 deletions
diff --git a/commonmark.rb b/commonmark.rb
deleted file mode 100755
index fe40a06..0000000
--- a/commonmark.rb
+++ /dev/null
@@ -1,388 +0,0 @@
-#!/usr/bin/env ruby
-require 'ffi'
-require 'stringio'
-require 'cgi'
-require 'set'
-require 'uri'
-
-module CMark
- extend FFI::Library
- ffi_lib ['libcmark', 'cmark']
- typedef :pointer, :node
- enum :node_type, [:document, :blockquote, :list, :list_item,
- :code_block, :html, :paragraph,
- :header, :hrule, :reference_def,
- :str, :softbreak, :linebreak, :code, :inline_html,
- :emph, :strong, :link, :image]
- enum :list_type, [:no_list, :bullet_list, :ordered_list]
-
- 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
- attach_function :cmark_node_get_url, [:node], :string
- attach_function :cmark_node_get_title, [:node], :string
- attach_function :cmark_node_get_header_level, [:node], :int
- attach_function :cmark_node_get_list_type, [:node], :list_type
- attach_function :cmark_node_get_list_start, [:node], :int
- attach_function :cmark_node_get_list_tight, [:node], :bool
-end
-
-class Node
- attr_accessor :type, :children, :parent, :string_content, :header_level,
- :list_type, :list_start, :list_tight, :url, :title
- def initialize(pointer)
- if pointer.null?
- return nil
- end
- @pointer = pointer
- @type = CMark::cmark_node_get_type(pointer)
- @children = []
- @parent = nil
- first_child = CMark::cmark_node_first_child(pointer)
- b = first_child
- while !b.null?
- child = Node.new(b)
- child.parent = self
- @children << child
- b = CMark::cmark_node_next(b)
- end
- @string_content = CMark::cmark_node_get_string_content(pointer)
- if @type == :header
- @header_level = CMark::cmark_node_get_header_level(pointer)
- end
- if @type == :list
- @list_type = CMark::cmark_node_get_list_type(pointer)
- @list_start = CMark::cmark_node_get_list_start(pointer)
- @list_tight = CMark::cmark_node_get_list_tight(pointer)
- end
- if @type == :link || @type == :image
- @url = CMark::cmark_node_get_url(pointer)
- if !@url then @url = "" end
- @title = CMark::cmark_node_get_title(pointer)
- if !@title then @title = "" end
- end
- if @type == :document
- self.free
- end
- end
-
- # An iterator that "walks the tree," returning each node
- def walk(&blk)
- yield self
- self.children.each do |child|
- child.walk(&blk)
- end
- end
-
- # Walk the tree and transform it. blk should take one argument,
- # a node. If its value is a node, that node replaces the node being
- # visited. If its value is an array of nodes, those nodes are spliced
- # in place of the node being visited (so, to delete a node, use an
- # empty array). Otherwise the node is left as it is.
- def transform(&blk)
- self.walk do |node|
- skip = false
- res = blk.call(node)
- if res.kind_of?(Array)
- splice = res
- elsif res.kind_of?(Node)
- splice = [res]
- else
- skip = true
- end
- unless skip
- parent = node.parent
- if parent
- siblings = node.parent.children
- index = siblings.index(node)
- siblings.replace(siblings.slice(0,index) + splice +
- siblings.slice(index + 1, siblings.length))
- else # at the document root, just skip
- end
- end
- end
- end
-
- def self.parse_string(s)
- Node.new(CMark::cmark_parse_document(s, s.bytesize))
- end
-
- def self.parse_file(f)
- s = f.read()
- self.parse_string(s)
- end
-
- protected
- def free
- CMark::cmark_free_nodes(@pointer)
- end
-end
-
-class Renderer
- attr_accessor :in_tight, :warnings, :in_plain
- def initialize(stream = nil)
- if stream
- @stream = stream
- @stringwriter = false
- else
- @stringwriter = true
- @stream = StringIO.new
- end
- @need_blocksep = false
- @warnings = Set.new []
- @in_tight = false
- @in_plain = false
- end
-
- def out(*args)
- args.each do |arg|
- if arg.kind_of?(String)
- @stream.write(arg)
- elsif arg.kind_of?(Node)
- self.render(arg)
- elsif arg.kind_of?(Array)
- arg.each { |x| self.out(x) }
- else
- @stream.write(arg)
- end
- end
- end
-
- def render(node)
- @node = node
- if node.type == :document
- self.document(node)
- self.out("\n")
- if @stringwriter
- return @stream.string
- end
- elsif self.in_plain && node.type != :str && node.type != :softbreak
- # pass through looking for str, softbreak
- node.children.each do |child|
- render(child)
- end
- else
- begin
- self.send(node.type, node)
- rescue NoMethodError => e
- @warnings.add("WARNING: " + node.type.to_s + " not implemented.")
- raise e
- end
- end
- end
-
- def document(node)
- self.out(node.children)
- end
-
- def code_block(node)
- self.code_block(node)
- end
-
- def reference_def(node)
- end
-
- def blocksep
- self.out("\n")
- end
-
- def containersep
- if !self.in_tight
- self.out("\n")
- end
- end
-
- def block(&blk)
- if @need_blocksep
- self.blocksep
- end
- blk.call
- @need_blocksep = true
- end
-
- def container(starter, ender, &blk)
- self.out(starter)
- self.containersep
- @need_blocksep = false
- blk.call
- self.containersep
- self.out(ender)
- end
-
- def plain(&blk)
- old_in_plain = @in_plain
- @in_plain = true
- blk.call
- @in_plain = old_in_plain
- end
-end
-
-class HtmlRenderer < Renderer
- def header(node)
- block do
- self.out("<h", node.header_level, ">", node.children,
- "</h", node.header_level, ">")
- end
- end
-
- def paragraph(node)
- block do
- if self.in_tight
- self.out(node.children)
- else
- self.out("<p>", node.children, "</p>")
- end
- end
- end
-
- def list(node)
- old_in_tight = self.in_tight
- self.in_tight = node.list_tight
- block do
- if node.list_type == :bullet_list
- container("<ul>", "</ul>") do
- self.out(node.children)
- end
- else
- start = node.list_start == 1 ? '' :
- (' start="' + node.list_start.to_s + '"')
- container(start, "</ol>") do
- self.out(node.children)
- end
- end
- end
- self.in_tight = old_in_tight
- end
-
- def list_item(node)
- block do
- container("<li>", "</li>") do
- self.out(node.children)
- end
- end
- end
-
- def blockquote(node)
- block do
- container("<blockquote>", "</blockquote>") do
- self.out(node.children)
- end
- end
- end
-
- def hrule(node)
- block do
- self.out("<hr />")
- end
- end
-
- def code_block(node)
- block do
- self.out("<pre><code>")
- self.out(CGI.escapeHTML(node.string_content))
- self.out("</code></pre>")
- end
- end
-
- def html(node)
- block do
- self.out(node.string_content)
- end
- end
-
- def inline_html(node)
- self.out(node.string_content)
- end
-
- def emph(node)
- self.out("<em>", node.children, "</em>")
- end
-
- def strong(node)
- self.out("<strong>", node.children, "</strong>")
- end
-
- def link(node)
- self.out('<a href="', URI.escape(node.url), '"')
- if node.title && node.title.length > 0
- self.out(' title="', CGI.escapeHTML(node.title), '"')
- end
- self.out('>', node.children, '</a>')
- end
-
- def image(node)
- self.out('<img src="', URI.escape(node.url), '"')
- if node.title && node.title.length > 0
- self.out(' title="', CGI.escapeHTML(node.title), '"')
- end
- plain do
- self.out(' alt="', node.children, '" />')
- end
- end
-
- def str(node)
- self.out(CGI.escapeHTML(node.string_content))
- end
-
- def code(node)
- self.out("<code>")
- self.out(CGI.escapeHTML(node.string_content))
- self.out("</code>")
- end
-
- def linebreak(node)
- self.out("<br/>")
- self.softbreak(node)
- end
-
- def softbreak(node)
- self.out("\n")
- end
-end
-
-doc = Node.parse_file(ARGF)
-
-# Walk tree and print URLs for links
-doc.walk do |node|
- if node.type == :link
- printf("URL = %s\n", node.url)
- end
-end
-
-# Capitalize strings in headers
-doc.walk do |node|
- if node.type == :header
- node.walk do |subnode|
- if subnode.type == :str
- subnode.string_content = subnode.string_content.upcase
- end
- end
- end
-end
-
-# Walk tree and transform links to regular text
-doc.transform do |node|
- if node.type == :link
- node.children
- end
-end
-
-renderer = HtmlRenderer.new(STDOUT)
-renderer.render(doc)
-renderer.warnings.each do |w|
- STDERR.write(w)
- STDERR.write("\n")
-end
-# def markdown_to_html(s)
-# len = s.bytes.length
-# CMark::cmark_markdown_to_html(s, len)
-# end
-# print markdown_to_html(STDIN.read())