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# Source: https://github.com/teamcapybara/capybara/blob/xpath_regexp/lib/capybara/selector/regexp_disassembler.rb
require 'regexp_parser'
module Watir
module Locators
class Element
class SelectorBuilder
class RegexpDisassembler
def initialize(regexp)
@regexp = regexp
@regexp_source = regexp.source
end
def substrings
@substrings ||= begin
strs = extract_strings(Regexp::Parser.parse(@regexp), [+''])
strs.map!(&:downcase) if @regexp.casefold?
strs.reject(&:empty?).uniq
end
end
private
def min_repeat(exp)
exp.quantifier&.min || 1
end
def fixed_repeat?(exp)
min_repeat(exp) == (exp.quantifier&.max || 1)
end
def optional?(exp)
min_repeat(exp).zero?
end
def extract_strings(expression, strings)
expression.each do |exp|
if optional?(exp)
strings.push(+'')
next
end
if %i[meta set].include?(exp.type)
strings.push(+'')
next
end
if exp.terminal?
case exp.type
when :literal
strings.last << (exp.text * min_repeat(exp))
when :escape
strings.last << (exp.char * min_repeat(exp))
else
strings.push(+'')
end
else
min_repeat(exp).times { extract_strings(exp, strings) }
end
strings.push(+'') unless fixed_repeat?(exp)
end
strings
end
end
end
end
end
end
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19 entries across 19 versions & 1 rubygems