module JekyllHtmlTruncatewords

Constants

VERSION

Public Instance Methods

html_truncatewords(input, words = 15, truncate_string = "...") click to toggle source

Truncate HTML input to have `words` words when rendered as HTML. Preserve HTML structure so tags are correctly matched.

# File lib/jekyll_html_truncatewords.rb, line 14
def html_truncatewords(input, words = 15, truncate_string = "...")
  words = words.to_i
  fragment = Nokogiri::HTML.fragment(input)

  if fragment.inner_text.split.length <= words
    return input
  end

  truncate_node(fragment, words, truncate_string)

  fragment.to_html
end

Private Instance Methods

truncate_node(node, words_remaining, truncate_string) click to toggle source

A recursive function to truncate the node, if necessary. Return the words remaining after accounting for the current node.

# File lib/jekyll_html_truncatewords.rb, line 29
        def truncate_node(node, words_remaining, truncate_string)
  if node.text?
    wordlist = node.text.to_s.split
    if wordlist.length < words_remaining
      return words_remaining - wordlist.length
    elsif wordlist.length == words_remaining
      node.content = node.content.rstrip + truncate_string
      return 0
    else
      node.content = truncate_text(node.text, words_remaining, truncate_string)
      return 0
    end
  else
    node.children.each do |n|
      if words_remaining > 0
        words_remaining = truncate_node(n, words_remaining, truncate_string)
      else
        n.remove
      end
    end
    
    return words_remaining
  end
end

truncate_text(input, words, truncate_string) click to toggle source

# File lib/jekyll_html_truncatewords.rb, line 54
        def truncate_text(input, words, truncate_string)
  leading_spaces = input.match(/^[ ]+/)
  lead = leading_spaces.nil? ? '' : leading_spaces[0]
  
  lead + truncatewords(input, words, truncate_string)
end