class Nokogiri::CSS::Parser
Constants
- CACHE_SWITCH_NAME
- Racc_arg
- Racc_debug_parser
- Racc_token_to_s_table
Public Class Methods
[](string)
click to toggle source
Get the css selector in string
from the cache
# File lib/nokogiri/css/parser_extras.rb, line 24 def [](string) return unless cache_on? @mutex.synchronize { @cache[string] } end
[]=(string, value)
click to toggle source
Set the css selector in string
in the cache to value
# File lib/nokogiri/css/parser_extras.rb, line 30 def []=(string, value) return value unless cache_on? @mutex.synchronize { @cache[string] = value } end
cache_on?()
click to toggle source
Return a thread-local boolean indicating whether the CSS-to-XPath cache is active. (Default is `true`.)
# File lib/nokogiri/css/parser_extras.rb, line 14 def cache_on? !Thread.current[CACHE_SWITCH_NAME] end
clear_cache(create_new_object = false)
click to toggle source
Clear the cache
# File lib/nokogiri/css/parser_extras.rb, line 36 def clear_cache(create_new_object = false) @mutex.synchronize do if create_new_object @cache = {} else @cache.clear end end end
new(namespaces = {})
click to toggle source
Create a new CSS
parser with respect to namespaces
Calls superclass method
# File lib/nokogiri/css/parser_extras.rb, line 57 def initialize(namespaces = {}) @tokenizer = Tokenizer.new @namespaces = namespaces super() end
set_cache(value)
click to toggle source
Set a thread-local boolean to turn cacheing on and off. Truthy values turn the cache on, falsey values turn the cache off.
# File lib/nokogiri/css/parser_extras.rb, line 19 def set_cache(value) Thread.current[CACHE_SWITCH_NAME] = !value end
without_cache(&block)
click to toggle source
Execute block
without cache
# File lib/nokogiri/css/parser_extras.rb, line 47 def without_cache(&block) original_cache_setting = cache_on? set_cache false block.call ensure set_cache original_cache_setting end
Public Instance Methods
_reduce_1(val, _values, result)
click to toggle source
reduce 0 omitted
# File lib/nokogiri/css/parser.rb, line 335 def _reduce_1(val, _values, result) result = [val.first, val.last].flatten result end
_reduce_11(val, _values, result)
click to toggle source
reduce 10 omitted
# File lib/nokogiri/css/parser.rb, line 388 def _reduce_11(val, _values, result) result = Node.new(:CONDITIONAL_SELECTOR, val) result end
_reduce_12(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 394 def _reduce_12(val, _values, result) result = Node.new(:CONDITIONAL_SELECTOR, val) result end
_reduce_13(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 400 def _reduce_13(val, _values, result) result = Node.new(:CONDITIONAL_SELECTOR, [Node.new(:ELEMENT_NAME, ['*']), val.first] ) result end
_reduce_14(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 408 def _reduce_14(val, _values, result) result = Node.new(val.first, [nil, val.last]) result end
_reduce_15(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 414 def _reduce_15(val, _values, result) result = Node.new(val[1], [val.first, val.last]) result end
_reduce_16(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 420 def _reduce_16(val, _values, result) result = Node.new(:DESCENDANT_SELECTOR, [val.first, val.last]) result end
_reduce_18(val, _values, result)
click to toggle source
reduce 17 omitted
# File lib/nokogiri/css/parser.rb, line 428 def _reduce_18(val, _values, result) result = Node.new(:CLASS_CONDITION, [unescape_css_identifier(val[1])]) result end
_reduce_2(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 341 def _reduce_2(val, _values, result) result = val.flatten result end
_reduce_20(val, _values, result)
click to toggle source
reduce 19 omitted
# File lib/nokogiri/css/parser.rb, line 435 def _reduce_20(val, _values, result) result = Node.new(:ELEMENT_NAME, val) result end
_reduce_21(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 440 def _reduce_21(val, _values, result) result = Node.new(:ELEMENT_NAME, [[val.first, val.last].compact.join(':')] ) result end
_reduce_22(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 448 def _reduce_22(val, _values, result) name = @namespaces.key?('xmlns') ? "xmlns:#{val.first}" : val.first result = Node.new(:ELEMENT_NAME, [name]) result end
_reduce_23(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 455 def _reduce_23(val, _values, result) result = val[0] result end
_reduce_25(val, _values, result)
click to toggle source
reduce 24 omitted
# File lib/nokogiri/css/parser.rb, line 462 def _reduce_25(val, _values, result) result = Node.new(:ATTRIBUTE_CONDITION, [val[1]] + (val[2] || []) ) result end
_reduce_26(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 470 def _reduce_26(val, _values, result) result = Node.new(:ATTRIBUTE_CONDITION, [val[1]] + (val[2] || []) ) result end
_reduce_27(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 478 def _reduce_27(val, _values, result) # non-standard, from hpricot result = Node.new(:PSEUDO_CLASS, [Node.new(:FUNCTION, ['nth-child(', val[1]])] ) result end
_reduce_28(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 487 def _reduce_28(val, _values, result) result = Node.new(:ELEMENT_NAME, [[val.first, val.last].compact.join(':')] ) result end
_reduce_29(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 495 def _reduce_29(val, _values, result) # Default namespace is not applied to attributes. # So we don't add prefix "xmlns:" as in namespaced_ident. result = Node.new(:ELEMENT_NAME, [val.first]) result end
_reduce_3(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 346 def _reduce_3(val, _values, result) result = [val.last].flatten result end
_reduce_30(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 503 def _reduce_30(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip]) result end
_reduce_31(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 509 def _reduce_31(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end
_reduce_32(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 515 def _reduce_32(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end
_reduce_33(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 521 def _reduce_33(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end
_reduce_34(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 527 def _reduce_34(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end
_reduce_35(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 533 def _reduce_35(val, _values, result) result = [val.first, val.last] result end
_reduce_36(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 538 def _reduce_36(val, _values, result) result = [val.first, val.last] result end
_reduce_37(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 543 def _reduce_37(val, _values, result) result = [val.first, val.last] result end
_reduce_4(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 351 def _reduce_4(val, _values, result) result = :DIRECT_ADJACENT_SELECTOR result end
_reduce_40(val, _values, result)
click to toggle source
reduce 39 omitted
# File lib/nokogiri/css/parser.rb, line 552 def _reduce_40(val, _values, result) case val[0] when 'even' result = Node.new(:NTH, ['2','n','+','0']) when 'odd' result = Node.new(:NTH, ['2','n','+','1']) when 'n' result = Node.new(:NTH, ['1','n','+','0']) else # non-standard to support custom functions: # assert_xpath("//a[foo(., @href)]", @parser.parse('a:foo(@href)')) # assert_xpath("//a[foo(., @a, b)]", @parser.parse('a:foo(@a, b)')) # assert_xpath("//a[foo(., a, 10)]", @parser.parse('a:foo(a, 10)')) result = val end result end
_reduce_41(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 571 def _reduce_41(val, _values, result) if val[1] == 'n' result = Node.new(:NTH, val) else raise Racc::ParseError, "parse error on IDENT '#{val[1]}'" end result end
_reduce_42(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 581 def _reduce_42(val, _values, result) # n+3, -n+3 if val[0] == 'n' val.unshift("1") result = Node.new(:NTH, val) elsif val[0] == '-n' val[0] = 'n' val.unshift("-1") result = Node.new(:NTH, val) else raise Racc::ParseError, "parse error on IDENT '#{val[1]}'" end result end
_reduce_43(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 597 def _reduce_43(val, _values, result) # 5n, -5n, 10n-1 n = val[1] if n[0, 2] == 'n-' val[1] = 'n' val << "-" # b is contained in n as n is the string "n-b" val << n[2, n.size] result = Node.new(:NTH, val) elsif n == 'n' val << "+" val << "0" result = Node.new(:NTH, val) else raise Racc::ParseError, "parse error on IDENT '#{val[1]}'" end result end
_reduce_44(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 617 def _reduce_44(val, _values, result) result = Node.new(:PSEUDO_CLASS, [val[1]]) result end
_reduce_45(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 623 def _reduce_45(val, _values, result) result = Node.new(:PSEUDO_CLASS, [val[1]]) result end
_reduce_48(val, _values, result)
click to toggle source
reduce 47 omitted
# File lib/nokogiri/css/parser.rb, line 632 def _reduce_48(val, _values, result) result = Node.new(:COMBINATOR, val) result end
_reduce_49(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 638 def _reduce_49(val, _values, result) result = Node.new(:COMBINATOR, val) result end
_reduce_5(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 356 def _reduce_5(val, _values, result) result = :CHILD_SELECTOR result end
_reduce_50(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 644 def _reduce_50(val, _values, result) result = Node.new(:COMBINATOR, val) result end
_reduce_51(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 650 def _reduce_51(val, _values, result) result = Node.new(:COMBINATOR, val) result end
_reduce_52(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 656 def _reduce_52(val, _values, result) result = Node.new(:COMBINATOR, val) result end
_reduce_58(val, _values, result)
click to toggle source
reduce 57 omitted
# File lib/nokogiri/css/parser.rb, line 672 def _reduce_58(val, _values, result) result = Node.new(:ID, [unescape_css_identifier(val.first)]) result end
_reduce_59(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 677 def _reduce_59(val, _values, result) result = [val.first, unescape_css_identifier(val[1])] result end
_reduce_6(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 361 def _reduce_6(val, _values, result) result = :FOLLOWING_SELECTOR result end
_reduce_60(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 682 def _reduce_60(val, _values, result) result = [val.first, unescape_css_string(val[1])] result end
_reduce_61(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 687 def _reduce_61(val, _values, result) result = [val.first, val[1]] result end
_reduce_63(val, _values, result)
click to toggle source
reduce 62 omitted
# File lib/nokogiri/css/parser.rb, line 694 def _reduce_63(val, _values, result) result = :equal result end
_reduce_64(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 699 def _reduce_64(val, _values, result) result = :prefix_match result end
_reduce_65(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 704 def _reduce_65(val, _values, result) result = :suffix_match result end
_reduce_66(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 709 def _reduce_66(val, _values, result) result = :substring_match result end
_reduce_67(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 714 def _reduce_67(val, _values, result) result = :not_equal result end
_reduce_68(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 719 def _reduce_68(val, _values, result) result = :includes result end
_reduce_69(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 724 def _reduce_69(val, _values, result) result = :dash_match result end
_reduce_7(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 366 def _reduce_7(val, _values, result) result = :DESCENDANT_SELECTOR result end
_reduce_70(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 729 def _reduce_70(val, _values, result) result = Node.new(:NOT, [val[1]]) result end
_reduce_8(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 371 def _reduce_8(val, _values, result) result = :CHILD_SELECTOR result end
_reduce_9(val, _values, result)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 376 def _reduce_9(val, _values, result) result = if val[1].nil? val.first else Node.new(:CONDITIONAL_SELECTOR, [val.first, val[1]]) end result end
_reduce_none(val, _values, result)
click to toggle source
reduce 75 omitted
# File lib/nokogiri/css/parser.rb, line 745 def _reduce_none(val, _values, result) val[0] end
next_token()
click to toggle source
# File lib/nokogiri/css/parser_extras.rb, line 68 def next_token @tokenizer.next_token end
on_error(error_token_id, error_value, value_stack)
click to toggle source
On CSS
parser error, raise an exception
# File lib/nokogiri/css/parser_extras.rb, line 88 def on_error(error_token_id, error_value, value_stack) after = value_stack.compact.last raise SyntaxError.new("unexpected '#{error_value}' after '#{after}'") end
parse(string)
click to toggle source
# File lib/nokogiri/css/parser_extras.rb, line 63 def parse(string) @tokenizer.scan_setup string do_parse end
unescape_css_identifier(identifier)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 18 def unescape_css_identifier(identifier) identifier.gsub(/\\(?:([^0-9a-fA-F])|([0-9a-fA-F]{1,6})\s?)/){ |m| $1 || [$2.hex].pack('U') } end
unescape_css_string(str)
click to toggle source
# File lib/nokogiri/css/parser.rb, line 22 def unescape_css_string(str) str.gsub(/\\(?:([^0-9a-fA-F])|([0-9a-fA-F]{1,6})\s?)/) do |m| if $1=="\n" '' else $1 || [$2.hex].pack('U') end end end
xpath_for(string, options = {})
click to toggle source
Get the xpath for string
using options
# File lib/nokogiri/css/parser_extras.rb, line 73 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