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# frozen_string_literal: true
module Capybara
class Server
class AnimationDisabler
def self.selector_for(css_or_bool)
case css_or_bool
when String
css_or_bool
when true
'*'
else
raise CapybaraError, 'Capybara.disable_animation supports either a String (the css selector to disable) or a boolean'
end
end
def initialize(app)
@app = app
@disable_css_markup = format(DISABLE_CSS_MARKUP_TEMPLATE,
selector: self.class.selector_for(Capybara.disable_animation))
@disable_js_markup = +DISABLE_JS_MARKUP_TEMPLATE
end
def call(env)
status, headers, body = @app.call(env)
return [status, headers, body] unless html_content?(headers)
nonces = directive_nonces(headers).transform_values { |nonce| "nonce=\"#{nonce}\"" if nonce && !nonce.empty? }
response = Rack::Response.new([], status, headers)
body.each { |html| response.write insert_disable(html, nonces) }
body.close if body.respond_to?(:close)
response.finish
end
private
attr_reader :disable_css_markup, :disable_js_markup
def html_content?(headers)
/html/.match?(headers['Content-Type']) # rubocop:todo Performance/StringInclude
end
def insert_disable(html, nonces)
html.sub(%r{(</head>)}, "<style #{nonces['style-src']}>#{disable_css_markup}</style>\\1")
.sub(%r{(</body>)}, "<script #{nonces['script-src']}>#{disable_js_markup}</script>\\1")
end
def directive_nonces(headers)
headers.fetch('Content-Security-Policy', '')
.split(';')
.map(&:split) # rubocop:disable Style/MapToHash
.to_h do |s|
[
s[0], s[1..].filter_map do |value|
/^'nonce-(?<nonce>.+)'/ =~ value
nonce
end[0]
]
end
end
DISABLE_CSS_MARKUP_TEMPLATE = <<~CSS
%<selector>s, %<selector>s::before, %<selector>s::after {
transition: none !important;
animation-duration: 0s !important;
animation-delay: 0s !important;
scroll-behavior: auto !important;
}
CSS
DISABLE_JS_MARKUP_TEMPLATE = <<~SCRIPT
//<![CDATA[
(typeof jQuery !== 'undefined') && (jQuery.fx.off = true);
//]]>
SCRIPT
end
end
end
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