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Versions: 5
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Contents
require 'thread'
module Nokogiri
module CSS
class Parser < GeneratedTokenizer
@cache_on = true
@cache = {}
@mutex = Mutex.new
class << self
attr_accessor :cache_on
alias :cache_on? :cache_on
alias :set_cache :cache_on=
def parse string
new.parse(string)
end
def xpath_for string, options={}
new.xpath_for(string, options)
end
def [] string
return unless @cache_on
@mutex.synchronize { @cache[string] }
end
def []= string, value
return value unless @cache_on
@mutex.synchronize { @cache[string] = value }
end
def clear_cache
@mutex.synchronize { @cache = {} }
end
def without_cache &block
tmp = @cache_on
@cache_on = false
block.call
@cache_on = tmp
end
end
alias :parse :scan_str
def xpath_for string, options={}
v = self.class[string]
return v if v
prefix = options[:prefix] || nil
visitor = options[:visitor] || nil
args = [prefix, visitor]
self.class[string] = parse(string).map { |ast|
ast.to_xpath(prefix, visitor)
}
end
def on_error error_token_id, error_value, value_stack
after = value_stack.compact.last
raise SyntaxError.new("unexpected '#{error_value}' after '#{after}'")
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems