view vendor/gems/coderay-1.0.0/lib/coderay/scanners/css.rb @ 1082:997f6d7738f7 bug_531

In repo controller entry action, show the page for the file even if it's binary (so user still has access to history etc links). This makes it possible to use the entry action as the default when a file is clicked on

module CodeRay
module Scanners

  class CSS < Scanner
    
    register_for :css
    
    KINDS_NOT_LOC = [
      :comment,
      :class, :pseudo_class, :type,
      :constant, :directive,
      :key, :value, :operator, :color, :float, :string,
      :error, :important,
    ]  # :nodoc:
    
    module RE  # :nodoc:
      Hex = /[0-9a-fA-F]/
      Unicode = /\\#{Hex}{1,6}(?:\r\n|\s)?/ # differs from standard because it allows uppercase hex too
      Escape = /#{Unicode}|\\[^\r\n\f0-9a-fA-F]/
      NMChar = /[-_a-zA-Z0-9]|#{Escape}/
      NMStart = /[_a-zA-Z]|#{Escape}/
      NL = /\r\n|\r|\n|\f/
      String1 = /"(?:[^\n\r\f\\"]|\\#{NL}|#{Escape})*"?/  # TODO: buggy regexp
      String2 = /'(?:[^\n\r\f\\']|\\#{NL}|#{Escape})*'?/  # TODO: buggy regexp
      String = /#{String1}|#{String2}/
      
      HexColor = /#(?:#{Hex}{6}|#{Hex}{3})/
      Color = /#{HexColor}/
      
      Num = /-?(?:[0-9]+|[0-9]*\.[0-9]+)/
      Name = /#{NMChar}+/
      Ident = /-?#{NMStart}#{NMChar}*/
      AtKeyword = /@#{Ident}/
      Percentage = /#{Num}%/
      
      reldimensions = %w[em ex px]
      absdimensions = %w[in cm mm pt pc]
      Unit = Regexp.union(*(reldimensions + absdimensions))
      
      Dimension = /#{Num}#{Unit}/
      
      Comment = %r! /\* (?: .*? \*/ | .* ) !mx
      Function = /(?:url|alpha|attr|counters?)\((?:[^)\n\r\f]|\\\))*\)?/
      
      Id = /##{Name}/
      Class = /\.#{Name}/
      PseudoClass = /:#{Name}/
      AttributeSelector = /\[[^\]]*\]?/
    end
    
  protected
    
    def scan_tokens encoder, options
      
      value_expected = nil
      states = [:initial]
      
      until eos?
        
        if match = scan(/\s+/)
          encoder.text_token match, :space
          
        elsif case states.last
          when :initial, :media
            if match = scan(/(?>#{RE::Ident})(?!\()|\*/ox)
              encoder.text_token match, :type
              next
            elsif match = scan(RE::Class)
              encoder.text_token match, :class
              next
            elsif match = scan(RE::Id)
              encoder.text_token match, :constant
              next
            elsif match = scan(RE::PseudoClass)
              encoder.text_token match, :pseudo_class
              next
            elsif match = scan(RE::AttributeSelector)
              # TODO: Improve highlighting inside of attribute selectors.
              encoder.text_token match[0,1], :operator
              encoder.text_token match[1..-2], :attribute_name if match.size > 2
              encoder.text_token match[-1,1], :operator if match[-1] == ?]
              next
            elsif match = scan(/@media/)
              encoder.text_token match, :directive
              states.push :media_before_name
              next
            end
          
          when :block
            if match = scan(/(?>#{RE::Ident})(?!\()/ox)
              if value_expected
                encoder.text_token match, :value
              else
                encoder.text_token match, :key
              end
              next
            end
            
          when :media_before_name
            if match = scan(RE::Ident)
              encoder.text_token match, :type
              states[-1] = :media_after_name
              next
            end
          
          when :media_after_name
            if match = scan(/\{/)
              encoder.text_token match, :operator
              states[-1] = :media
              next
            end
          
          else
            #:nocov:
            raise_inspect 'Unknown state', encoder
            #:nocov:
            
          end
          
        elsif match = scan(/\/\*(?:.*?\*\/|\z)/m)
          encoder.text_token match, :comment
          
        elsif match = scan(/\{/)
          value_expected = false
          encoder.text_token match, :operator
          states.push :block
          
        elsif match = scan(/\}/)
          value_expected = false
          if states.last == :block || states.last == :media
            encoder.text_token match, :operator
            states.pop
          else
            encoder.text_token match, :error
          end
          
        elsif match = scan(/#{RE::String}/o)
          encoder.begin_group :string
          encoder.text_token match[0, 1], :delimiter
          encoder.text_token match[1..-2], :content if match.size > 2
          encoder.text_token match[-1, 1], :delimiter if match.size >= 2
          encoder.end_group :string
          
        elsif match = scan(/#{RE::Function}/o)
          encoder.begin_group :string
          start = match[/^\w+\(/]
          encoder.text_token start, :delimiter
          if match[-1] == ?)
            encoder.text_token match[start.size..-2], :content
            encoder.text_token ')', :delimiter
          else
            encoder.text_token match[start.size..-1], :content
          end
          encoder.end_group :string
          
        elsif match = scan(/(?: #{RE::Dimension} | #{RE::Percentage} | #{RE::Num} )/ox)
          encoder.text_token match, :float
          
        elsif match = scan(/#{RE::Color}/o)
          encoder.text_token match, :color
          
        elsif match = scan(/! *important/)
          encoder.text_token match, :important
          
        elsif match = scan(/(?:rgb|hsl)a?\([^()\n]*\)?/)
          encoder.text_token match, :color
          
        elsif match = scan(RE::AtKeyword)
          encoder.text_token match, :directive
          
        elsif match = scan(/ [+>:;,.=()\/] /x)
          if match == ':'
            value_expected = true
          elsif match == ';'
            value_expected = false
          end
          encoder.text_token match, :operator
          
        else
          encoder.text_token getch, :error
          
        end
        
      end
      
      encoder
    end
    
  end
  
end
end