Module: EffectiveTruncateHtmlHelper

Defined in:
app/helpers/effective_truncate_html_helper.rb

Instance Method Summary collapse

Instance Method Details

#chunk_html(text, max_length = 2, _ellipsis = '...', read_more = nil) ⇒ Object 



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# File 'app/helpers/effective_truncate_html_helper.rb', line 2

def chunk_html(text, max_length = 2, _ellipsis = '...', read_more = nil)
  doc = Nokogiri::HTML::DocumentFragment.parse text

  if doc.children.length >= max_length
    doc.children.last.remove while doc.children.length > max_length
    doc.children.last.add_next_sibling Nokogiri::HTML::DocumentFragment.parse("<p>#{ read_more }</p>")
  end

  doc.inner_html.html_safe
end

#truncate_html(text, max = 200, read_more = '', ellipsis = '...') ⇒ Object 



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# File 'app/helpers/effective_truncate_html_helper.rb', line 13

def truncate_html(text, max = 200, read_more = '', ellipsis = '...')
  doc = Nokogiri::HTML::DocumentFragment.parse(text)
  length = doc.inner_text.length

  while length > max
    element = doc
    element = element.last_element_child while element.last_element_child.present?
    # element is now the last nested element (i.e. an HTML node, NOT a text node) in the HTML, or doc itself if doc has no elements (text node)

    if (length - element.inner_text.length) > max  # If deleting this entire node means we're still over max, do it
      element.remove
    else # If we truncate this node, we'll be under max
      if element.name == 'a'
        element.remove  # I don't want to cut a link in half
      elsif element.children.length == 1 # There must be a text node here.  Can there be more than 1 text node?
        textNode = element.children.first
        textNode.content = truncate(textNode.content, length: (max - length), separator: ' ', omission: ellipsis)
        break # Break out of our while loop, as our ellipsis might invalidate our looping condition
      else # Unexpected, so just remove the whole thing
        Rails.logger.info "effective_posts, Unexpected number of last_element_child children"
        element.remove
      end
    end

    length = doc.inner_text.length
  end

  # Clean up any empty tags
  doc.last_element_child.remove while doc.last_element_child.try(:inner_html) == ''

  (doc.inner_html + read_more.to_s).html_safe
end