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