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module CodeRay
module Scanners
# YAML Scanner
#
# Based on the YAML scanner from Syntax by Jamis Buck.
class YAML < Scanner
register_for :yaml
file_extension 'yml'
KINDS_NOT_LOC = :all
def scan_tokens tokens, options
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
end
end
end
|
