19 lines
582 B
Ruby
19 lines
582 B
Ruby
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module Banzai
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module Querying
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# Searches a Nokogiri document using a CSS query, optionally optimizing it
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# whenever possible.
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#
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# document - A document/element to search.
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# query - The CSS query to use.
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#
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# Returns a Nokogiri::XML::NodeSet.
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def self.css(document, query)
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# When using "a.foo" Nokogiri compiles this to "//a[...]" but
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# "descendant::a[...]" is quite a bit faster and achieves the same result.
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xpath = Nokogiri::CSS.xpath_for(query)[0].gsub(%r{^//}, 'descendant::')
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document.xpath(xpath)
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end
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end
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end
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