Module: NokogiriTruncateHtml::TruncateHtmlHelper

Defined in:
lib/nokogiri_truncate_html/truncate_html_helper.rb

Instance Method Summary collapse

Instance Method Details

#truncate_html(input, *args) ⇒ Object

Truncates html respecting tags and html entities.

The API is the same as ActionView::Helpers::TextHelper#truncate. It uses Nokogiri and HtmlEntities for entity awareness.

Examples:

truncate_html '<p>Hello <strong>World</strong></p>', :length => 7 # => '<p>Hello <strong>W&hellip;</strong></p>'
truncate_html '<p>Hello &amp; Goodbye</p>', :length => 7          # => '<p>Hello &amp;&hellip;</p>'



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# File 'lib/nokogiri_truncate_html/truncate_html_helper.rb', line 17

def truncate_html(input, *args)
  self.document ||= TruncateDocument.new#(TruncateHtmlHelper.flavor) #, length, omission)
  self.parser ||= Nokogiri::HTML::SAX::Parser.new(document)

  # support both 2.2 & earlier APIs
  options = args.extract_options!
  length = options[:length] || args[0] || 30
  omission = options[:omission] || args[1] || '&hellip;'

  # Adding div around the input is a hack. It gets removed in TruncateDocument.
  input = "<div>#{input}</div>"
  self.document.length = length
  self.document.omission = omission
  catch(:truncate_finished) do
    self.parser.parse_memory(input)
  end
  self.document.output.html_safe
end