[18425] | 1 | require "rexml/validation/validation"
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| 2 | require "rexml/parsers/baseparser"
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| 3 |
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| 4 | module REXML
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| 5 | module Validation
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| 6 | # Implemented:
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| 7 | # * empty
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| 8 | # * element
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| 9 | # * attribute
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| 10 | # * text
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| 11 | # * optional
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| 12 | # * choice
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| 13 | # * oneOrMore
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| 14 | # * zeroOrMore
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| 15 | # * group
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| 16 | # * value
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| 17 | # * interleave
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| 18 | # * mixed
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| 19 | # * ref
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| 20 | # * grammar
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| 21 | # * start
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| 22 | # * define
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| 23 | #
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| 24 | # Not implemented:
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| 25 | # * data
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| 26 | # * param
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| 27 | # * include
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| 28 | # * externalRef
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| 29 | # * notAllowed
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| 30 | # * anyName
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| 31 | # * nsName
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| 32 | # * except
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| 33 | # * name
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| 34 | class RelaxNG
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| 35 | include Validator
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| 36 |
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| 37 | INFINITY = 1.0 / 0.0
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| 38 | EMPTY = Event.new( nil )
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| 39 | TEXT = [:start_element, "text"]
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| 40 | attr_accessor :current
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| 41 | attr_accessor :count
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| 42 | attr_reader :references
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| 43 |
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| 44 | # FIXME: Namespaces
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| 45 | def initialize source
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| 46 | parser = REXML::Parsers::BaseParser.new( source )
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| 47 |
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| 48 | @count = 0
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| 49 | @references = {}
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| 50 | @root = @current = Sequence.new(self)
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| 51 | @root.previous = true
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| 52 | states = [ @current ]
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| 53 | begin
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| 54 | event = parser.pull
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| 55 | case event[0]
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| 56 | when :start_element
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| 57 | case event[1]
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| 58 | when "empty"
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| 59 | when "element", "attribute", "text", "value"
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| 60 | states[-1] << event
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| 61 | when "optional"
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| 62 | states << Optional.new( self )
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| 63 | states[-2] << states[-1]
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| 64 | when "choice"
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| 65 | states << Choice.new( self )
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| 66 | states[-2] << states[-1]
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| 67 | when "oneOrMore"
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| 68 | states << OneOrMore.new( self )
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| 69 | states[-2] << states[-1]
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| 70 | when "zeroOrMore"
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| 71 | states << ZeroOrMore.new( self )
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| 72 | states[-2] << states[-1]
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| 73 | when "group"
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| 74 | states << Sequence.new( self )
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| 75 | states[-2] << states[-1]
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| 76 | when "interleave"
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| 77 | states << Interleave.new( self )
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| 78 | states[-2] << states[-1]
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| 79 | when "mixed"
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| 80 | states << Interleave.new( self )
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| 81 | states[-2] << states[-1]
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| 82 | states[-1] << TEXT
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| 83 | when "define"
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| 84 | states << [ event[2]["name"] ]
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| 85 | when "ref"
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| 86 | states[-1] << Ref.new( event[2]["name"] )
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| 87 | when "anyName"
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| 88 | states << AnyName.new( self )
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| 89 | states[-2] << states[-1]
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| 90 | when "nsName"
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| 91 | when "except"
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| 92 | when "name"
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| 93 | when "data"
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| 94 | when "param"
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| 95 | when "include"
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| 96 | when "grammar"
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| 97 | when "start"
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| 98 | when "externalRef"
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| 99 | when "notAllowed"
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| 100 | end
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| 101 | when :end_element
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| 102 | case event[1]
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| 103 | when "element", "attribute"
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| 104 | states[-1] << event
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| 105 | when "zeroOrMore", "oneOrMore", "choice", "optional",
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| 106 | "interleave", "group", "mixed"
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| 107 | states.pop
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| 108 | when "define"
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| 109 | ref = states.pop
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| 110 | @references[ ref.shift ] = ref
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| 111 | #when "empty"
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| 112 | end
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| 113 | when :end_document
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| 114 | states[-1] << event
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| 115 | when :text
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| 116 | states[-1] << event
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| 117 | end
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| 118 | end while event[0] != :end_document
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| 119 | end
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| 120 |
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| 121 | def receive event
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| 122 | validate( event )
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| 123 | end
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| 124 | end
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| 125 |
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| 126 | class State
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| 127 | def initialize( context )
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| 128 | @previous = []
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| 129 | @events = []
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| 130 | @current = 0
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| 131 | @count = context.count += 1
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| 132 | @references = context.references
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| 133 | @value = false
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| 134 | end
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| 135 |
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| 136 | def reset
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| 137 | return if @current == 0
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| 138 | @current = 0
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| 139 | @events.each {|s| s.reset if s.kind_of? State }
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| 140 | end
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| 141 |
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| 142 | def previous=( previous )
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| 143 | @previous << previous
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| 144 | end
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| 145 |
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| 146 | def next( event )
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| 147 | #print "In next with #{event.inspect}. "
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| 148 | #puts "Next (#@current) is #{@events[@current]}"
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| 149 | #p @previous
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| 150 | return @previous.pop.next( event ) if @events[@current].nil?
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| 151 | expand_ref_in( @events, @current ) if @events[@current].class == Ref
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| 152 | if ( @events[@current].kind_of? State )
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| 153 | @current += 1
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| 154 | @events[@current-1].previous = self
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| 155 | return @events[@current-1].next( event )
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| 156 | end
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| 157 | #puts "Current isn't a state"
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| 158 | if ( @events[@current].matches?(event) )
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| 159 | @current += 1
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| 160 | if @events[@current].nil?
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| 161 | #puts "#{inspect[0,5]} 1RETURNING #{@previous.inspect[0,5]}"
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| 162 | return @previous.pop
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| 163 | elsif @events[@current].kind_of? State
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| 164 | @current += 1
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| 165 | #puts "#{inspect[0,5]} 2RETURNING (#{@current-1}) #{@events[@current-1].inspect[0,5]}; on return, next is #{@events[@current]}"
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| 166 | @events[@current-1].previous = self
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| 167 | return @events[@current-1]
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| 168 | else
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| 169 | #puts "#{inspect[0,5]} RETURNING self w/ next(#@current) = #{@events[@current]}"
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| 170 | return self
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| 171 | end
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| 172 | else
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| 173 | return nil
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| 174 | end
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| 175 | end
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| 176 |
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| 177 | def to_s
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| 178 | # Abbreviated:
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| 179 | self.class.name =~ /(?:::)(\w)\w+$/
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| 180 | # Full:
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| 181 | #self.class.name =~ /(?:::)(\w+)$/
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| 182 | "#$1.#@count"
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| 183 | end
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| 184 |
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| 185 | def inspect
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| 186 | "< #{to_s} #{@events.collect{|e|
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| 187 | pre = e == @events[@current] ? '#' : ''
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| 188 | pre + e.inspect unless self == e
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| 189 | }.join(', ')} >"
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| 190 | end
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| 191 |
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| 192 | def expected
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| 193 | return [@events[@current]]
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| 194 | end
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| 195 |
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| 196 | def <<( event )
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| 197 | add_event_to_arry( @events, event )
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| 198 | end
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| 199 |
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| 200 |
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| 201 | protected
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| 202 | def expand_ref_in( arry, ind )
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| 203 | new_events = []
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| 204 | @references[ arry[ind].to_s ].each{ |evt|
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| 205 | add_event_to_arry(new_events,evt)
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| 206 | }
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| 207 | arry[ind,1] = new_events
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| 208 | end
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| 209 |
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| 210 | def add_event_to_arry( arry, evt )
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| 211 | evt = generate_event( evt )
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| 212 | if evt.kind_of? String
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| 213 | arry[-1].event_arg = evt if arry[-1].kind_of? Event and @value
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| 214 | @value = false
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| 215 | else
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| 216 | arry << evt
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| 217 | end
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| 218 | end
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| 219 |
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| 220 | def generate_event( event )
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| 221 | return event if event.kind_of? State or event.class == Ref
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| 222 | evt = nil
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| 223 | arg = nil
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| 224 | case event[0]
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| 225 | when :start_element
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| 226 | case event[1]
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| 227 | when "element"
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| 228 | evt = :start_element
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| 229 | arg = event[2]["name"]
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| 230 | when "attribute"
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| 231 | evt = :start_attribute
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| 232 | arg = event[2]["name"]
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| 233 | when "text"
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| 234 | evt = :text
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| 235 | when "value"
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| 236 | evt = :text
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| 237 | @value = true
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| 238 | end
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| 239 | when :text
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| 240 | return event[1]
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| 241 | when :end_document
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| 242 | return Event.new( event[0] )
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| 243 | else # then :end_element
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| 244 | case event[1]
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| 245 | when "element"
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| 246 | evt = :end_element
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| 247 | when "attribute"
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| 248 | evt = :end_attribute
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| 249 | end
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| 250 | end
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| 251 | return Event.new( evt, arg )
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| 252 | end
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| 253 | end
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| 254 |
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| 255 |
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| 256 | class Sequence < State
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| 257 | def matches?(event)
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| 258 | @events[@current].matches?( event )
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| 259 | end
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| 260 | end
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| 261 |
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| 262 |
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| 263 | class Optional < State
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| 264 | def next( event )
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| 265 | if @current == 0
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| 266 | rv = super
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| 267 | return rv if rv
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| 268 | @prior = @previous.pop
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| 269 | return @prior.next( event )
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| 270 | end
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| 271 | super
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| 272 | end
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| 273 |
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| 274 | def matches?(event)
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| 275 | @events[@current].matches?(event) ||
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| 276 | (@current == 0 and @previous[-1].matches?(event))
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| 277 | end
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| 278 |
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| 279 | def expected
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| 280 | return [ @prior.expected, @events[0] ].flatten if @current == 0
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| 281 | return [@events[@current]]
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| 282 | end
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| 283 | end
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| 284 |
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| 285 |
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| 286 | class ZeroOrMore < Optional
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| 287 | def next( event )
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| 288 | expand_ref_in( @events, @current ) if @events[@current].class == Ref
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| 289 | if ( @events[@current].matches?(event) )
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| 290 | @current += 1
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| 291 | if @events[@current].nil?
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| 292 | @current = 0
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| 293 | return self
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| 294 | elsif @events[@current].kind_of? State
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| 295 | @current += 1
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| 296 | @events[@current-1].previous = self
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| 297 | return @events[@current-1]
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| 298 | else
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| 299 | return self
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| 300 | end
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| 301 | else
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| 302 | @prior = @previous.pop
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| 303 | return @prior.next( event ) if @current == 0
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| 304 | return nil
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| 305 | end
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| 306 | end
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| 307 |
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| 308 | def expected
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| 309 | return [ @prior.expected, @events[0] ].flatten if @current == 0
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| 310 | return [@events[@current]]
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| 311 | end
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| 312 | end
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| 313 |
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| 314 |
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| 315 | class OneOrMore < State
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| 316 | def initialize context
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| 317 | super
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| 318 | @ord = 0
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| 319 | end
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| 320 |
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| 321 | def reset
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| 322 | super
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| 323 | @ord = 0
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| 324 | end
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| 325 |
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| 326 | def next( event )
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| 327 | expand_ref_in( @events, @current ) if @events[@current].class == Ref
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| 328 | if ( @events[@current].matches?(event) )
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| 329 | @current += 1
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| 330 | @ord += 1
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| 331 | if @events[@current].nil?
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| 332 | @current = 0
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| 333 | return self
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| 334 | elsif @events[@current].kind_of? State
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| 335 | @current += 1
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| 336 | @events[@current-1].previous = self
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| 337 | return @events[@current-1]
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| 338 | else
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| 339 | return self
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| 340 | end
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| 341 | else
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| 342 | return @previous.pop.next( event ) if @current == 0 and @ord > 0
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| 343 | return nil
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| 344 | end
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| 345 | end
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| 346 |
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| 347 | def matches?( event )
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| 348 | @events[@current].matches?(event) ||
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| 349 | (@current == 0 and @ord > 0 and @previous[-1].matches?(event))
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| 350 | end
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| 351 |
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| 352 | def expected
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| 353 | if @current == 0 and @ord > 0
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| 354 | return [@previous[-1].expected, @events[0]].flatten
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| 355 | else
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| 356 | return [@events[@current]]
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| 357 | end
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| 358 | end
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| 359 | end
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| 360 |
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| 361 |
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| 362 | class Choice < State
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| 363 | def initialize context
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| 364 | super
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| 365 | @choices = []
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| 366 | end
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| 367 |
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| 368 | def reset
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| 369 | super
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| 370 | @events = []
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| 371 | @choices.each { |c| c.each { |s| s.reset if s.kind_of? State } }
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| 372 | end
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| 373 |
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| 374 | def <<( event )
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| 375 | add_event_to_arry( @choices, event )
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| 376 | end
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| 377 |
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| 378 | def next( event )
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| 379 | # Make the choice if we haven't
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| 380 | if @events.size == 0
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| 381 | c = 0 ; max = @choices.size
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| 382 | while c < max
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| 383 | if @choices[c][0].class == Ref
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| 384 | expand_ref_in( @choices[c], 0 )
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| 385 | @choices += @choices[c]
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| 386 | @choices.delete( @choices[c] )
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| 387 | max -= 1
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| 388 | else
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| 389 | c += 1
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| 390 | end
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| 391 | end
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| 392 | @events = @choices.find { |evt| evt[0].matches? event }
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| 393 | # Remove the references
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| 394 | # Find the events
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| 395 | end
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| 396 | #puts "In next with #{event.inspect}."
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| 397 | #puts "events is #{@events.inspect}"
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| 398 | unless @events
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| 399 | @events = []
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| 400 | return nil
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| 401 | end
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| 402 | #puts "current = #@current"
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| 403 | super
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| 404 | end
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| 405 |
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| 406 | def matches?( event )
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| 407 | return @events[@current].matches?( event ) if @events.size > 0
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| 408 | [email protected]{|evt| evt[0].matches?(event)}.nil?
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| 409 | end
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| 410 |
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| 411 | def expected
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| 412 | #puts "IN CHOICE EXPECTED"
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| 413 | #puts "EVENTS = #{@events.inspect}"
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| 414 | return [@events[@current]] if @events.size > 0
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| 415 | return @choices.collect do |x|
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| 416 | if x[0].kind_of? State
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| 417 | x[0].expected
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| 418 | else
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| 419 | x[0]
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| 420 | end
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| 421 | end.flatten
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| 422 | end
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| 423 |
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| 424 | def inspect
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| 425 | "< #{to_s} #{@choices.collect{|e| e.collect{|f|f.to_s}.join(', ')}.join(' or ')} >"
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| 426 | end
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| 427 |
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| 428 | protected
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| 429 | def add_event_to_arry( arry, evt )
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| 430 | if evt.kind_of? State or evt.class == Ref
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| 431 | arry << [evt]
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| 432 | elsif evt[0] == :text
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| 433 | if arry[-1] and
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| 434 | arry[-1][-1].kind_of?( Event ) and
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| 435 | arry[-1][-1].event_type == :text and @value
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| 436 |
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| 437 | arry[-1][-1].event_arg = evt[1]
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| 438 | @value = false
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| 439 | end
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| 440 | else
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| 441 | arry << [] if evt[0] == :start_element
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| 442 | arry[-1] << generate_event( evt )
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| 443 | end
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| 444 | end
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| 445 | end
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| 446 |
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| 447 |
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| 448 | class Interleave < Choice
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| 449 | def initialize context
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| 450 | super
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| 451 | @choice = 0
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| 452 | end
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| 453 |
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| 454 | def reset
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| 455 | @choice = 0
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| 456 | end
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| 457 |
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| 458 | def next_current( event )
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| 459 | # Expand references
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| 460 | c = 0 ; max = @choices.size
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| 461 | while c < max
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| 462 | if @choices[c][0].class == Ref
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| 463 | expand_ref_in( @choices[c], 0 )
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| 464 | @choices += @choices[c]
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| 465 | @choices.delete( @choices[c] )
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| 466 | max -= 1
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| 467 | else
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| 468 | c += 1
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| 469 | end
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| 470 | end
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| 471 | @events = @choices[@choice..-1].find { |evt| evt[0].matches? event }
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| 472 | @current = 0
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| 473 | if @events
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| 474 | # reorder the choices
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| 475 | old = @choices[@choice]
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| 476 | idx = @choices.index( @events )
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| 477 | @choices[@choice] = @events
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| 478 | @choices[idx] = old
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| 479 | @choice += 1
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| 480 | end
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| 481 |
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| 482 | #puts "In next with #{event.inspect}."
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| 483 | #puts "events is #{@events.inspect}"
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| 484 | @events = [] unless @events
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| 485 | end
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| 486 |
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| 487 |
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| 488 | def next( event )
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| 489 | # Find the next series
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| 490 | next_current(event) unless @events[@current]
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| 491 | return nil unless @events[@current]
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| 492 |
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| 493 | expand_ref_in( @events, @current ) if @events[@current].class == Ref
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| 494 | #puts "In next with #{event.inspect}."
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| 495 | #puts "Next (#@current) is #{@events[@current]}"
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| 496 | if ( @events[@current].kind_of? State )
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| 497 | @current += 1
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| 498 | @events[@current-1].previous = self
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| 499 | return @events[@current-1].next( event )
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| 500 | end
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| 501 | #puts "Current isn't a state"
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| 502 | return @previous.pop.next( event ) if @events[@current].nil?
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| 503 | if ( @events[@current].matches?(event) )
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| 504 | @current += 1
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| 505 | if @events[@current].nil?
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| 506 | #puts "#{inspect[0,5]} 1RETURNING self" unless @choices[@choice].nil?
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| 507 | return self unless @choices[@choice].nil?
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| 508 | #puts "#{inspect[0,5]} 1RETURNING #{@previous[-1].inspect[0,5]}"
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| 509 | return @previous.pop
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| 510 | elsif @events[@current].kind_of? State
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| 511 | @current += 1
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| 512 | #puts "#{inspect[0,5]} 2RETURNING (#{@current-1}) #{@events[@current-1].inspect[0,5]}; on return, next is #{@events[@current]}"
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| 513 | @events[@current-1].previous = self
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| 514 | return @events[@current-1]
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| 515 | else
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| 516 | #puts "#{inspect[0,5]} RETURNING self w/ next(#@current) = #{@events[@current]}"
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| 517 | return self
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| 518 | end
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| 519 | else
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| 520 | return nil
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| 521 | end
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| 522 | end
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| 523 |
|
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| 524 | def matches?( event )
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| 525 | return @events[@current].matches?( event ) if @events[@current]
|
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| 526 | !@choices[@choice..-1].find{|evt| evt[0].matches?(event)}.nil?
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| 527 | end
|
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| 528 |
|
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| 529 | def expected
|
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| 530 | #puts "IN CHOICE EXPECTED"
|
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| 531 | #puts "EVENTS = #{@events.inspect}"
|
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| 532 | return [@events[@current]] if @events[@current]
|
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| 533 | return @choices[@choice..-1].collect do |x|
|
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| 534 | if x[0].kind_of? State
|
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| 535 | x[0].expected
|
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| 536 | else
|
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| 537 | x[0]
|
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| 538 | end
|
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| 539 | end.flatten
|
---|
| 540 | end
|
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| 541 |
|
---|
| 542 | def inspect
|
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| 543 | "< #{to_s} #{@choices.collect{|e| e.collect{|f|f.to_s}.join(', ')}.join(' and ')} >"
|
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| 544 | end
|
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| 545 | end
|
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| 546 |
|
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| 547 | class Ref
|
---|
| 548 | def initialize value
|
---|
| 549 | @value = value
|
---|
| 550 | end
|
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| 551 | def to_s
|
---|
| 552 | @value
|
---|
| 553 | end
|
---|
| 554 | def inspect
|
---|
| 555 | "{#{to_s}}"
|
---|
| 556 | end
|
---|
| 557 | end
|
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| 558 | end
|
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| 559 | end
|
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