Class: CodeRay::Scanners::YAML
- Defined in:
- lib/coderay/scanners/yaml.rb
Overview
YAML Scanner
Based on the YAML scanner from Syntax by Jamis Buck.
Constant Summary
Constants inherited from Scanner
Scanner::DEFAULT_OPTIONS, Scanner::ScanError
Instance Method Summary collapse
Methods inherited from Scanner
#column, #each, file_extension, #initialize, #line, normify, #reset, streamable?, #streaming?, #string=, #tokenize, #tokens
Methods included from Plugin
#helper, #included, #plugin_host, #plugin_id, #register_for, #title
Constructor Details
This class inherits a constructor from CodeRay::Scanners::Scanner
Instance Method Details
#scan_tokens(tokens, options) ⇒ Object
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 |
# File 'lib/coderay/scanners/yaml.rb', line 12 def scan_tokens tokens, value_expected = nil state = :initial key_indent = indent = 0 until eos? kind = nil match = nil if bol? key_indent = nil if $DEBUG indent = check(/ +/) ? matched.size : 0 tokens << [indent.to_s, :debug] end end if match = scan(/ +[\t ]*/) kind = :space elsif match = scan(/\n+/) kind = :space state = :initial if match.index(?\n) elsif match = scan(/#.*/) kind = :comment elsif bol? and case when match = scan(/---|\.\.\./) tokens << [:open, :head] tokens << [match, :head] tokens << [:close, :head] next when match = scan(/%.*/) tokens << [match, :doctype] next end elsif state == :value and case when !check(/(?:"[^"]*")(?=: |:$)/) && scan(/"/) tokens << [:open, :string] tokens << [matched, :delimiter] tokens << [matched, :content] if scan(/ [^"\\]* (?: \\. [^"\\]* )* /mx) tokens << [matched, :delimiter] if scan(/"/) tokens << [:close, :string] next when match = scan(/[|>][-+]?/) tokens << [:open, :string] tokens << [match, :delimiter] string_indent = key_indent || column(pos - match.size - 1) tokens << [matched, :content] if scan(/(?:\n+ {#{string_indent + 1}}.*)+/) tokens << [:close, :string] next when match = scan(/(?![!"*&]).+?(?=$|\s+#)/) tokens << [match, :string] string_indent = key_indent || column(pos - match.size - 1) tokens << [matched, :string] if scan(/(?:\n+ {#{string_indent + 1}}.*)+/) next end elsif case when match = scan(/[-:](?= |$)/) state = :value if state == :colon && (match == ':' || match == '-') state = :value if state == :initial && match == '-' kind = :operator when match = scan(/[,{}\[\]]/) kind = :operator when state == :initial && match = scan(/[\w.() ]*\S(?=: |:$)/) kind = :key key_indent = column(pos - match.size - 1) # tokens << [key_indent.inspect, :debug] state = :colon when match = scan(/(?:"[^"\n]*"|'[^'\n]*')(?=: |:$)/) tokens << [:open, :key] tokens << [match[0,1], :delimiter] tokens << [match[1..-2], :content] tokens << [match[-1,1], :delimiter] tokens << [:close, :key] key_indent = column(pos - match.size - 1) # tokens << [key_indent.inspect, :debug] state = :colon next when scan(/(![\w\/]+)(:([\w:]+))?/) tokens << [self[1], :type] if self[2] tokens << [':', :operator] tokens << [self[3], :class] end next when scan(/&\S+/) kind = :variable when scan(/\*\w+/) kind = :global_variable when scan(/<</) kind = :class_variable when scan(/\d\d:\d\d:\d\d/) kind = :oct when scan(/\d\d\d\d-\d\d-\d\d\s\d\d:\d\d:\d\d(\.\d+)? [-+]\d\d:\d\d/) kind = :oct when scan(/:\w+/) kind = :symbol when scan(/[^:\s]+(:(?! |$)[^:\s]*)* .*/) kind = :error when scan(/[^:\s]+(:(?! |$)[^:\s]*)*/) kind = :error end else getch kind = :error end match ||= matched raise_inspect 'Error token %p in line %d' % [[match, kind], line], tokens if $DEBUG && !kind raise_inspect 'Empty token', tokens unless match tokens << [match, kind] end tokens end |