Module: Translighterate

Defined in:
lib/translighterate.rb,
lib/translighterate/version.rb

Constant Summary collapse

VERSION = 
"0.3.0"

Class Method Summary collapse

Class Method Details

.highlight(text, phrases, options = {}) ⇒ Object

Copied (and modified!) from

https://github.com/rails/rails/blob/495ef4124e292dcc7062e3e1f04f623053113101/actionview/lib/action_view/helpers/text_helper.rb#L130



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# File 'lib/translighterate.rb', line 8

def self.highlight(text, phrases, options = {})
  text = sanitize(text) if options.fetch(:sanitize, true)

  if text.blank? || phrases.blank?
    text || ""
  else
    match = Array(phrases).map do |p|
      Regexp === p ? p.to_s : Regexp.escape(p)
    end.join('|')

    # Transliteration trick from:
    #  https://github.com/cubing/worldcubeassociation.org/issues/238#issuecomment-234702800
    transliterated = text.chars.map { |ch| transliterate_char(ch) }.join

    previous_match_end_index = 0
    result = ""
    transliterated.scan(/(#{match})(?![^<]*?>)/i) do
      match_range = $~.offset(0)
      result += text[previous_match_end_index...match_range[0]]
      original_text_found = text[Range.new(*match_range, true)]
      previous_match_end_index = match_range[1]

      result += if block_given?
                  yield original_text_found
                else
                  highlighter = options.fetch(:highlighter, '<mark>\1</mark>')
                  highlighter.gsub(/\\1/, original_text_found)
                end
    end
    result += text[previous_match_end_index..-1]
  end.html_safe
end