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140 lines
4.2 KiB
140 lines
4.2 KiB
module CodeRay
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module Scanners
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# YAML Scanner
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#
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# Based on the YAML scanner from Syntax by Jamis Buck.
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class YAML < Scanner
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register_for :yaml
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file_extension 'yml'
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KINDS_NOT_LOC = :all
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def scan_tokens tokens, options
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value_expected = nil
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state = :initial
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key_indent = indent = 0
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until eos?
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kind = nil
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match = nil
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key_indent = nil if bol?
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if match = scan(/ +[\t ]*/)
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kind = :space
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elsif match = scan(/\n+/)
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kind = :space
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state = :initial if match.index(?\n)
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elsif match = scan(/#.*/)
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kind = :comment
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elsif bol? and case
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when match = scan(/---|\.\.\./)
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tokens << [:open, :head]
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tokens << [match, :head]
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tokens << [:close, :head]
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next
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when match = scan(/%.*/)
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tokens << [match, :doctype]
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next
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end
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elsif state == :value and case
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when !check(/(?:"[^"]*")(?=: |:$)/) && scan(/"/)
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tokens << [:open, :string]
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tokens << [matched, :delimiter]
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tokens << [matched, :content] if scan(/ [^"\\]* (?: \\. [^"\\]* )* /mx)
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tokens << [matched, :delimiter] if scan(/"/)
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tokens << [:close, :string]
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next
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when match = scan(/[|>][-+]?/)
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tokens << [:open, :string]
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tokens << [match, :delimiter]
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string_indent = key_indent || column(pos - match.size - 1)
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tokens << [matched, :content] if scan(/(?:\n+ {#{string_indent + 1}}.*)+/)
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tokens << [:close, :string]
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next
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when match = scan(/(?![!"*&]).+?(?=$|\s+#)/)
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tokens << [match, :string]
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string_indent = key_indent || column(pos - match.size - 1)
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tokens << [matched, :string] if scan(/(?:\n+ {#{string_indent + 1}}.*)+/)
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next
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end
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elsif case
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when match = scan(/[-:](?= |$)/)
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state = :value if state == :colon && (match == ':' || match == '-')
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state = :value if state == :initial && match == '-'
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kind = :operator
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when match = scan(/[,{}\[\]]/)
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kind = :operator
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when state == :initial && match = scan(/[\w.() ]*\S(?=: |:$)/)
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kind = :key
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key_indent = column(pos - match.size - 1)
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# tokens << [key_indent.inspect, :debug]
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state = :colon
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when match = scan(/(?:"[^"\n]*"|'[^'\n]*')(?=: |:$)/)
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tokens << [:open, :key]
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tokens << [match[0,1], :delimiter]
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tokens << [match[1..-2], :content]
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tokens << [match[-1,1], :delimiter]
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tokens << [:close, :key]
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key_indent = column(pos - match.size - 1)
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# tokens << [key_indent.inspect, :debug]
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state = :colon
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next
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when scan(/(![\w\/]+)(:([\w:]+))?/)
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tokens << [self[1], :type]
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if self[2]
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tokens << [':', :operator]
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tokens << [self[3], :class]
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end
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next
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when scan(/&\S+/)
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kind = :variable
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when scan(/\*\w+/)
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kind = :global_variable
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when scan(/<</)
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kind = :class_variable
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when scan(/\d\d:\d\d:\d\d/)
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kind = :oct
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when scan(/\d\d\d\d-\d\d-\d\d\s\d\d:\d\d:\d\d(\.\d+)? [-+]\d\d:\d\d/)
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kind = :oct
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when scan(/:\w+/)
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kind = :symbol
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when scan(/[^:\s]+(:(?! |$)[^:\s]*)* .*/)
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kind = :error
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when scan(/[^:\s]+(:(?! |$)[^:\s]*)*/)
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kind = :error
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end
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else
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getch
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kind = :error
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end
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match ||= matched
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if $CODERAY_DEBUG and not kind
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raise_inspect 'Error token %p in line %d' %
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[[match, kind], line], tokens, state
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end
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raise_inspect 'Empty token', tokens, state unless match
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tokens << [match, kind]
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end
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tokens
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end
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end
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end
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end
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