71 lines
1.6 KiB
Ruby
71 lines
1.6 KiB
Ruby
module CodeRay
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module Encoders
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class HTML
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class CSS
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attr :stylesheet
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def CSS.load_stylesheet style = nil
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CodeRay::Styles[style]
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end
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def initialize style = :default
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@classes = Hash.new
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style = CSS.load_stylesheet style
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@stylesheet = [
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style::CSS_MAIN_STYLES,
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style::TOKEN_COLORS.gsub(/^(?!$)/, '.CodeRay ')
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].join("\n")
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parse style::TOKEN_COLORS
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end
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def [] *styles
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cl = @classes[styles.first]
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return '' unless cl
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style = ''
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1.upto(styles.size) do |offset|
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break if style = cl[styles[offset .. -1]]
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end
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# warn 'Style not found: %p' % [styles] if style.empty?
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return style
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end
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private
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CSS_CLASS_PATTERN = /
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( # $1 = selectors
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(?:
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(?: \s* \. [-\w]+ )+
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\s* ,?
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)+
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)
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\s* \{ \s*
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( [^\}]+ )? # $2 = style
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\s* \} \s*
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( . ) # $3 = error
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/mx
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def parse stylesheet
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stylesheet.scan CSS_CLASS_PATTERN do |selectors, style, error|
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raise "CSS parse error: '#{error.inspect}' not recognized" if error
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for selector in selectors.split(',')
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classes = selector.scan(/[-\w]+/)
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cl = classes.pop
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@classes[cl] ||= Hash.new
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@classes[cl][classes] = style.to_s.strip.delete(' ').chomp(';')
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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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end
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end
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if $0 == __FILE__
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require 'pp'
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pp CodeRay::Encoders::HTML::CSS.new
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end
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