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# frozen_string_literal: true
require 'capybara/selector/selector'
module Capybara
class Selector
class CSS
def self.escape(str)
value = str.dup
out = +''
out << value.slice!(0...1) if value.match?(/^[-_]/)
out << (value[0].match?(NMSTART) ? value.slice!(0...1) : escape_char(value.slice!(0...1)))
out << value.gsub(/[^a-zA-Z0-9_-]/) { |char| escape_char char }
out
end
def self.escape_char(char)
char.match?(%r{[ -/:-~]}) ? "\\#{char}" : format('\\%06<hex>x', hex: char.ord)
end
def self.split(css)
Splitter.new.split(css)
end
S = '\u{80}-\u{D7FF}\u{E000}-\u{FFFD}\u{10000}-\u{10FFFF}'
H = /[0-9a-fA-F]/
UNICODE = /\\#{H}{1,6}[ \t\r\n\f]?/
NONASCII = /[#{S}]/
ESCAPE = /#{UNICODE}|\\[ -~#{S}]/
NMSTART = /[_a-zA-Z]|#{NONASCII}|#{ESCAPE}/
class Splitter
def split(css)
selectors = []
StringIO.open(css.to_s) do |str|
selector = +''
while (char = str.getc)
case char
when '['
selector << parse_square(str)
when '('
selector << parse_paren(str)
when '"', "'"
selector << parse_string(char, str)
when '\\'
selector << (char + str.getc)
when ','
selectors << selector.strip
selector.clear
else
selector << char
end
end
selectors << selector.strip
end
selectors
end
private
def parse_square(strio)
parse_block('[', ']', strio)
end
def parse_paren(strio)
parse_block('(', ')', strio)
end
def parse_block(start, final, strio)
block = start
while (char = strio.getc)
case char
when final
return block + char
when '\\'
block += char + strio.getc
when '"', "'"
block += parse_string(char, strio)
else
block += char
end
end
raise ArgumentError, "Invalid CSS Selector - Block end '#{final}' not found"
end
def parse_string(quote, strio)
string = quote
while (char = strio.getc)
string += char
case char
when quote
return string
when '\\'
string += strio.getc
end
end
raise ArgumentError, 'Invalid CSS Selector - string end not found'
end
end
end
end
end
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