89 lines
2.7 KiB
Ruby
89 lines
2.7 KiB
Ruby
# Extensions namespace
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module Middleman
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module Extensions
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# Minify CSS Extension
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module MinifyCss
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# Setup extension
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class << self
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# Once registered
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def registered(app, options={})
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app.set :css_compressor, false
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ignore = Array(options[:ignore]) << /\.min\./
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inline = options[:inline] || false
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app.after_configuration do
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chosen_compressor = css_compressor || options[:compressor] || begin
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::Middleman::Extensions::MinifyCss::SassCompressor
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end
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# Setup Rack middleware to minify CSS
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use Rack, :compressor => chosen_compressor,
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:ignore => ignore,
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:inline => inline
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end
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end
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alias :included :registered
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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, 'jammit-combined-input').parse
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root_node.options = { :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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# Init
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# @param [Class] app
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# @param [Hash] options
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def initialize(app, options={})
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@app = app
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@compressor = options[:compressor]
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@ignore = options[:ignore]
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@inline = options[:inline]
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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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path = env["PATH_INFO"]
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if (path.end_with?('.html') || path.end_with?('.php')) && @inline
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uncompressed_source = ::Middleman::Util.extract_response_text(response)
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minified = uncompressed_source.gsub(/(<style[^>]*>\s*(?:\/\*<!\[CDATA\[\*\/\n)?)(.*?)((?:(?:\n\s*)?\/\*\]\]>\*\/)?\s*<\/style>)/m) do |match|
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first = $1
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css = $2
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last = $3
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minified_css = @compressor.compress(css)
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first << minified_css << last
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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 path.end_with?('.css') && @ignore.none? {|ignore| Middleman::Util.path_match(ignore, path) }
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uncompressed_source = ::Middleman::Util.extract_response_text(response)
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minified_css = @compressor.compress(uncompressed_source)
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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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end
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end
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end
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end
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