87 lines
2.7 KiB
Ruby
87 lines
2.7 KiB
Ruby
require 'middleman-core/contracts'
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# Minify CSS Extension
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class Middleman::Extensions::MinifyCss < ::Middleman::Extension
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option :inline, false, 'Whether to minify CSS inline within HTML files'
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option :ignore, [], 'Patterns to avoid minifying'
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option :compressor, proc {
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require 'sass'
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SassCompressor
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}, 'Set the CSS compressor to use.'
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def ready
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# Setup Rack middleware to minify CSS
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app.use Rack, compressor: options[:compressor],
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ignore: Array(options[:ignore]) + [/\.min\./],
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inline: options[:inline]
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end
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class SassCompressor
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def self.compress(style, options={})
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root_node = ::Sass::SCSS::CssParser.new(style, 'middleman-css-input', 1).parse
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root_node.options = options.merge(style: :compressed)
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root_node.render.strip
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end
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end
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# Rack middleware to look for CSS and compress it
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class Rack
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include Contracts
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INLINE_CSS_REGEX = /(<style[^>]*>\s*(?:\/\*<!\[CDATA\[\*\/\n)?)(.*?)((?:(?:\n\s*)?\/\*\]\]>\*\/)?\s*<\/style>)/m
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# Init
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# @param [Class] app
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# @param [Hash] options
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Contract RespondTo[:call], ({
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ignore: ArrayOf[PATH_MATCHER],
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inline: Bool,
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compressor: Or[Proc, RespondTo[:to_proc], RespondTo[:compress]]
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}) => Any
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def initialize(app, options={})
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@app = app
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@ignore = options.fetch(:ignore)
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@inline = options.fetch(:inline)
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@compressor = options.fetch(:compressor)
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@compressor = @compressor.to_proc if @compressor.respond_to? :to_proc
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@compressor = @compressor.call if @compressor.is_a? Proc
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end
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# Rack interface
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# @param [Rack::Environmemt] env
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# @return [Array]
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def call(env)
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status, headers, response = @app.call(env)
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if inline_html_content?(env['PATH_INFO'])
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minified = ::Middleman::Util.extract_response_text(response)
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minified.gsub!(INLINE_CSS_REGEX) do
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$1 << @compressor.compress($2) << $3
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end
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headers['Content-Length'] = ::Rack::Utils.bytesize(minified).to_s
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response = [minified]
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elsif standalone_css_content?(env['PATH_INFO'])
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minified_css = @compressor.compress(::Middleman::Util.extract_response_text(response))
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headers['Content-Length'] = ::Rack::Utils.bytesize(minified_css).to_s
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response = [minified_css]
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end
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[status, headers, response]
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end
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private
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Contract String => Bool
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def inline_html_content?(path)
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(path.end_with?('.html') || path.end_with?('.php')) && @inline
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end
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Contract String => Bool
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def standalone_css_content?(path)
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path.end_with?('.css') && @ignore.none? { |ignore| Middleman::Util.path_match(ignore, path) }
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end
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end
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end
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