Nokogiri 鋸

Attributes

cache_on RW

Turn on CSS parse caching

Public Class Methods

[](string) Show Source

Get the css selector in string from the cache

# File lib/nokogiri/css/parser.rb, line 17 def [] string return unless @cache_on @mutex.synchronize { @cache[string] } end

[]=(string, value) Show Source

Set the css selector in string in the cache to value

# File lib/nokogiri/css/parser.rb, line 23 def []= string, value return value unless @cache_on @mutex.synchronize { @cache[string] = value } end

clear_cache() Show Source

Clear the cache

# File lib/nokogiri/css/parser.rb, line 29 def clear_cache @mutex.synchronize { @cache = {} } end

new(namespaces = {}) Show Source

Create a new CSS parser with respect to namespaces

# File lib/nokogiri/css/parser.rb, line 54 def initialize namespaces = {} @namespaces = namespaces super() end

parse(selector) Show Source

Parse this CSS selector in selector. Returns an AST.

# File lib/nokogiri/css/parser.rb, line 43 def parse selector @warned ||= false unless @warned $stderr.puts('Nokogiri::CSS::Parser.parse is deprecated, call Nokogiri::CSS.parse(), this will be removed August 1st or version 1.4.0 (whichever is first)') @warned = true end new.parse selector end

without_cache(&block) Show Source

Execute block without cache

# File lib/nokogiri/css/parser.rb, line 34 def without_cache &block tmp = @cache_on @cache_on = false block.call @cache_on = tmp end

Public Instance Methods

on_error(error_token_id, error_value, value_stack) Show Source

On CSS parser error, raise an exception

# File lib/nokogiri/css/parser.rb, line 76 def on_error error_token_id, error_value, value_stack after = value_stack.compact.last raise SyntaxError.new("unexpected '#{error_value}' after '#{after}'") end

xpath_for(string, options={}) Show Source

Get the xpath for string using options

# File lib/nokogiri/css/parser.rb, line 61 def xpath_for string, options={} key = "#{string}#{options[:ns]}#{options[:prefix]}" v = self.class[key] return v if v args = [ options[:prefix] || '//', options[:visitor] || XPathVisitor.new ] self.class[key] = parse(string).map { |ast| ast.to_xpath(*args) } end