regex_helpers.coffee

@RegexHelpers =
  # matches colors like #ffffff, #eee, rgb(255,255,255), and rgba(255, 255, 255, 0.25)
  cssColorMatchString: '(?:#(?:[0-9a-f]{6}|[0-9a-f]{3}))|(?:rgba?\\((?:\\d+, *){2,3}(?:\\d+(?:\\.\\d+)?)\\))'

  makeTagRegex: (tagName, attributeMatch=".*") ->
    # matches:
    #   <tagName attribute>content</tagName>
    #   [tagName: attribute]content[/tagName]
    #   <tagName = attribute>content</tagName>
    #   <tagName>content</tagName>
    #
    # $1 is attribute, $2 is content
    attributeMatch = attributeMatch.join('|') if _.isArray(attributeMatch)
    new RegExp "(?:<|\\[)#{tagName}(?: *(?: |:|=) *(#{attributeMatch}))? *(?:>|\\])(.+)(?:<|\\[)\\/#{tagName}(?:>|\\])", 'ig'