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# frozen_string_literal: true
class Sanitize
module Transformers
module CSS
# Enforces a CSS allowlist on the contents of `style` attributes.
class CleanAttribute
def initialize(sanitizer_or_config)
@scss = if Sanitize::CSS === sanitizer_or_config
sanitizer_or_config
else
Sanitize::CSS.new(sanitizer_or_config)
end
end
def call(env)
node = env[:node]
return unless node.type == Nokogiri::XML::Node::ELEMENT_NODE &&
node.key?("style") && !env[:is_allowlisted]
attr = node.attribute("style")
css = @scss.properties(attr.value)
if css.strip.empty?
attr.unlink
else
attr.value = css
end
end
end
# Enforces a CSS allowlist on the contents of `<style>` elements.
class CleanElement
def initialize(sanitizer_or_config)
@scss = if Sanitize::CSS === sanitizer_or_config
sanitizer_or_config
else
Sanitize::CSS.new(sanitizer_or_config)
end
end
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
end
end
end
end
|
