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# frozen_string_literal: true
module Rouge
module Guessers
class Disambiguation < Guesser
include Util
include Lexers
def initialize(filename, source)
@filename = File.basename(filename)
@source = source
end
def filter(lexers)
return lexers if lexers.size == 1
return lexers if lexers.size == Lexer.all.size
@analyzer = TextAnalyzer.new(get_source(@source))
self.class.disambiguators.each do |disambiguator|
next unless disambiguator.match?(@filename)
filtered = disambiguator.decide!(self)
return filtered if filtered
end
return lexers
end
def contains?(text)
return @analyzer.include?(text)
end
def matches?(re)
return !!(@analyzer =~ re)
end
@disambiguators = []
def self.disambiguate(*patterns, &decider)
@disambiguators << Disambiguator.new(patterns, &decider)
end
def self.disambiguators
@disambiguators
end
class Disambiguator
include Util
def initialize(patterns, &decider)
@patterns = patterns
@decider = decider
end
def decide!(guesser)
out = guesser.instance_eval(&@decider)
case out
when Array then out
when nil then nil
else [out]
end
end
def match?(filename)
@patterns.any? { |p| test_glob(p, filename) }
end
end
disambiguate '*.cfg' do
next CiscoIos if matches?(/\A\s*(version|banner|interface)\b/)
INI
end
disambiguate '*.pl' do
next Perl if contains?('my $')
next Prolog if contains?(':-')
next Prolog if matches?(/\A\w+(\(\w+\,\s*\w+\))*\./)
end
disambiguate '*.h' do
next ObjectiveC if matches?(/@(end|implementation|protocol|property)\b/)
next ObjectiveC if contains?('@"')
next Cpp if matches?(/^\s*(?:catch|class|constexpr|namespace|private|
protected|public|template|throw|try|using)\b/x)
C
end
disambiguate '*.m' do
next ObjectiveC if matches?(/@(end|implementation|protocol|property)\b/)
next ObjectiveC if contains?('@"')
next Mathematica if contains?('(*')
next Mathematica if contains?(':=')
next Mason if matches?(/<%(def|method|text|doc|args|flags|attr|init|once|shared|perl|cleanup|filter)([^>]*)(>)/)
next Matlab if matches?(/^\s*?%/)
next Mason if matches? %r!(</?%|<&)!
end
disambiguate '*.php' do
# PHP always takes precedence over Hack
PHP
end
disambiguate '*.hh' do
next Cpp if matches?(/^\s*#include/)
next Hack if matches?(/^<\?hh/)
next Hack if matches?(/(\(|, ?)\$\$/)
Cpp
end
disambiguate '*.plist' do
next XML if matches?(/\A<\?xml\b/)
Plist
end
disambiguate '*.sc' do
next Python if matches?(/^#/)
next SuperCollider if matches?(/(?:^~|;$)/)
next Python
end
disambiguate 'Messages' do
next MsgTrans if matches?(/^[^\s:]+:[^\s:]+/)
next PlainText
end
disambiguate '*.cls' do
next TeX if matches?(/\A\s*(?:\\|%)/)
next OpenEdge if matches?(/(no\-undo|BLOCK\-LEVEL|ROUTINE\-LEVEL|&ANALYZE\-SUSPEND)/i)
next Apex
end
disambiguate '*.pp' do
next Puppet if matches?(/(::)?([a-z]\w*::)/)
next Pascal if matches?(/^(function|begin|var)\b/)
next Pascal if matches?(/\b(end(;|\.))/)
Puppet
end
disambiguate '*.p' do
next Prolog if contains?(':-')
next Prolog if matches?(/\A\w+(\(\w+\,\s*\w+\))*\./)
next OpenEdge
end
disambiguate '*.st' do
next IecST if matches?(/^\s*END_/i)
next Smalltalk
end
end
end
end
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