class Sanitize::Transformers::CSS::CleanElement

Enforces a CSS allowlist on the contents of ‘<style>` elements.

Public Class Methods

new(sanitizer_or_config) click to toggle source
# File lib/sanitize/transformers/clean_css.rb, line 32
def initialize(sanitizer_or_config)
  if Sanitize::CSS === sanitizer_or_config
    @scss = sanitizer_or_config
  else
    @scss = Sanitize::CSS.new(sanitizer_or_config)
  end
end

Public Instance Methods

call(env) click to toggle source
# File lib/sanitize/transformers/clean_css.rb, line 40
def call(env)
  node = env[:node]

  return unless node.type == Nokogiri::XML::Node::ELEMENT_NODE &&
      env[:node_name] == 'style'

  css = @scss.stylesheet(node.content)

  if css.strip.empty?
    node.unlink
  else
    css.gsub!('</', '<\/')
    node.children.unlink
    node << Nokogiri::XML::Text.new(css, node.document)
  end
end