Class: MarkdownIt::RulesCore::Linkify

Inherits:
Object
  • Object
show all
Defined in:
lib/motion-markdown-it/rules_core/linkify.rb

Constant Summary collapse

MAILTO_RE = 
/^mailto\:/

Class Method Summary collapse

Class Method Details

.isLinkClose(str) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_core/linkify.rb', line 14

def self.isLinkClose(str)
  return !(/^<\/a\s*>/i =~ str).nil?
end

.isLinkOpen(str) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_core/linkify.rb', line 11

def self.isLinkOpen(str)
  return !(/^<a[>\s]/i =~ str).nil?
end

.linkify(state) ⇒ Object 



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# File 'lib/motion-markdown-it/rules_core/linkify.rb', line 19

def self.linkify(state)
  blockTokens = state.tokens

  return if (!state.md.options[:linkify])

  (0...blockTokens.length).each do |j|
    if (blockTokens[j].type != 'inline' || !state.md.linkify.pretest(blockTokens[j].content))
      next
    end

    tokens = blockTokens[j].children

    htmlLinkLevel = 0

    # We scan from the end, to keep position when new tags added.
    # Use reversed logic in links start/end match
    i = tokens.length - 1
    while i >= 0
      currentToken = tokens[i]

      # Skip content of markdown links
      if (currentToken.type == 'link_close')
        i -= 1
        while (tokens[i].level != currentToken.level && tokens[i].type != 'link_open')
          i -= 1
        end
        i -= 1 and next
      end

      # Skip content of html tag links
      if (currentToken.type == 'html_inline')
        if (isLinkOpen(currentToken.content) && htmlLinkLevel > 0)
          htmlLinkLevel -= 1
        end
        if (isLinkClose(currentToken.content))
          htmlLinkLevel += 1
        end
      end
      i -= 1 and next if (htmlLinkLevel > 0)

      if (currentToken.type == 'text' && state.md.linkify.test(currentToken.content))

        text = currentToken.content
        links = state.md.linkify.match(text)

        # Now split string to nodes
        nodes   = []
        level   = currentToken.level
        lastPos = 0
        
        (0...links.length).each do |ln|
          url = links[ln].url
          fullUrl = state.md.normalizeLink.call(url)
          next if (!state.md.validateLink.call(fullUrl))

          urlText = links[ln].text

          # Linkifier might send raw hostnames like "example.com", where url
          # starts with domain name. So we prepend http:// in those cases,
          # and remove it afterwards.
          if links[ln].schema.empty?
            urlText = state.md.normalizeLinkText.call("http://#{urlText}").sub(/^http:\/\//, '')
          elsif (links[ln].schema == 'mailto:' && !(MAILTO_RE =~ urlText))
            urlText = state.md.normalizeLinkText.call("mailto:#{urlText}").sub(MAILTO_RE, '')
          else
            urlText = state.md.normalizeLinkText.call(urlText)
          end

          pos = links[ln].index

          if (pos > lastPos)
            token         = Token.new('text', '', 0)
            token.content = text.slice(lastPos...pos)
            token.level   = level
            nodes.push(token)
          end

          token         = Token.new('link_open', 'a', 1)
          token.attrs   = [ [ 'href', fullUrl ] ]
          token.level   = level
          level        += 1
          token.markup  = 'linkify'
          token.info    = 'auto'
          nodes.push(token)

          token         = Token.new('text', '', 0)
          token.content = urlText
          token.level   = level
          nodes.push(token)

          token         = Token.new('link_close', 'a', -1)
          level        -= 1
          token.level   = level
          token.markup  = 'linkify'
          token.info    = 'auto'
          nodes.push(token)

          lastPos = links[ln].lastIndex
        end
        if (lastPos < text.length)
          token         = Token.new('text', '', 0)
          token.content = text[lastPos..-1]
          token.level   = level
          nodes.push(token)
        end

        # replace current node
        tokens[i] = nodes
        blockTokens[j].children = (tokens.flatten!(1))
      end
      i -= 1
    end
  end
end