Nokogiri::CSS::Parser
class Nokogiri::CSS::Parser
Constants
- Racc_arg
- Racc_debug_parser
- Racc_token_to_s_table
Attributes
Turn on CSS parse caching
Turn on CSS parse caching
Turn on CSS parse caching
Public Class Methods
Get the css selector in string
from the cache
# File lib/nokogiri/css/parser_extras.rb, line 17 def [] string return unless @cache_on @mutex.synchronize { @cache[string] } end
Set the css selector in string
in the cache to value
# File lib/nokogiri/css/parser_extras.rb, line 23 def []= string, value return value unless @cache_on @mutex.synchronize { @cache[string] = value } end
Clear the cache
# File lib/nokogiri/css/parser_extras.rb, line 29 def clear_cache @mutex.synchronize { @cache = {} } end
Create a new CSS parser with respect to namespaces
# File lib/nokogiri/css/parser_extras.rb, line 54 def initialize namespaces = {} @tokenizer = Tokenizer.new @namespaces = namespaces super() end
Parse this CSS selector in selector
. Returns an AST.
# File lib/nokogiri/css/parser_extras.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
Execute block
without cache
# File lib/nokogiri/css/parser_extras.rb, line 34 def without_cache &block tmp = @cache_on @cache_on = false block.call @cache_on = tmp end
Public Instance Methods
reduce 0 omitted
# File lib/nokogiri/css/parser.rb, line 321 def _reduce_1(val, _values, result) result = [val.first, val.last].flatten result end
reduce 10 omitted
# File lib/nokogiri/css/parser.rb, line 374 def _reduce_11(val, _values, result) result = Node.new(:CONDITIONAL_SELECTOR, val) result end
# File lib/nokogiri/css/parser.rb, line 380 def _reduce_12(val, _values, result) result = Node.new(:CONDITIONAL_SELECTOR, val) result end
# File lib/nokogiri/css/parser.rb, line 386 def _reduce_13(val, _values, result) result = Node.new(:CONDITIONAL_SELECTOR, [Node.new(:ELEMENT_NAME, ['*']), val.first] ) result end
# File lib/nokogiri/css/parser.rb, line 394 def _reduce_14(val, _values, result) result = Node.new(val.first, [nil, val.last]) result end
# File lib/nokogiri/css/parser.rb, line 400 def _reduce_15(val, _values, result) result = Node.new(val[1], [val.first, val.last]) result end
# File lib/nokogiri/css/parser.rb, line 406 def _reduce_16(val, _values, result) result = Node.new(:DESCENDANT_SELECTOR, [val.first, val.last]) result end
reduce 17 omitted
# File lib/nokogiri/css/parser.rb, line 414 def _reduce_18(val, _values, result) result = Node.new(:CLASS_CONDITION, [unescape_css_identifier(val[1])]) result end
# File lib/nokogiri/css/parser.rb, line 327 def _reduce_2(val, _values, result) result = val.flatten result end
reduce 19 omitted
# File lib/nokogiri/css/parser.rb, line 421 def _reduce_20(val, _values, result) result = Node.new(:ELEMENT_NAME, val) result end
# File lib/nokogiri/css/parser.rb, line 426 def _reduce_21(val, _values, result) result = Node.new(:ELEMENT_NAME, [[val.first, val.last].compact.join(':')] ) result end
# File lib/nokogiri/css/parser.rb, line 434 def _reduce_22(val, _values, result) name = @namespaces.key?('xmlns') ? "xmlns:#{val.first}" : val.first result = Node.new(:ELEMENT_NAME, [name]) result end
# File lib/nokogiri/css/parser.rb, line 441 def _reduce_23(val, _values, result) result = val[0] result end
reduce 24 omitted
# File lib/nokogiri/css/parser.rb, line 448 def _reduce_25(val, _values, result) result = Node.new(:ATTRIBUTE_CONDITION, [val[1]] + (val[2] || []) ) result end
# File lib/nokogiri/css/parser.rb, line 456 def _reduce_26(val, _values, result) result = Node.new(:ATTRIBUTE_CONDITION, [val[1]] + (val[2] || []) ) result end
# File lib/nokogiri/css/parser.rb, line 464 def _reduce_27(val, _values, result) # Non standard, but hpricot supports it. result = Node.new(:PSEUDO_CLASS, [Node.new(:FUNCTION, ['nth-child(', val[1]])] ) result end
# File lib/nokogiri/css/parser.rb, line 473 def _reduce_28(val, _values, result) result = Node.new(:ELEMENT_NAME, [[val.first, val.last].compact.join(':')] ) result end
# File lib/nokogiri/css/parser.rb, line 481 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
# File lib/nokogiri/css/parser.rb, line 332 def _reduce_3(val, _values, result) result = [val.last].flatten result end
# File lib/nokogiri/css/parser.rb, line 489 def _reduce_30(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip]) result end
# File lib/nokogiri/css/parser.rb, line 495 def _reduce_31(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end
# File lib/nokogiri/css/parser.rb, line 501 def _reduce_32(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end
# File lib/nokogiri/css/parser.rb, line 507 def _reduce_33(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end
# File lib/nokogiri/css/parser.rb, line 513 def _reduce_34(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end
# File lib/nokogiri/css/parser.rb, line 519 def _reduce_35(val, _values, result) result = [val.first, val.last] result end
# File lib/nokogiri/css/parser.rb, line 524 def _reduce_36(val, _values, result) result = [val.first, val.last] result end
# File lib/nokogiri/css/parser.rb, line 529 def _reduce_37(val, _values, result) result = [val.first, val.last] result end
# File lib/nokogiri/css/parser.rb, line 337 def _reduce_4(val, _values, result) result = :DIRECT_ADJACENT_SELECTOR result end
reduce 39 omitted
# File lib/nokogiri/css/parser.rb, line 538 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 # This is not CSS standard. It allows us to support this: # 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
# File lib/nokogiri/css/parser.rb, line 557 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
# File lib/nokogiri/css/parser.rb, line 567 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
# File lib/nokogiri/css/parser.rb, line 583 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
# File lib/nokogiri/css/parser.rb, line 603 def _reduce_44(val, _values, result) result = Node.new(:PSEUDO_CLASS, [val[1]]) result end
# File lib/nokogiri/css/parser.rb, line 609 def _reduce_45(val, _values, result) result = Node.new(:PSEUDO_CLASS, [val[1]]) result end
reduce 47 omitted
# File lib/nokogiri/css/parser.rb, line 618 def _reduce_48(val, _values, result) result = Node.new(:COMBINATOR, val) result end
# File lib/nokogiri/css/parser.rb, line 624 def _reduce_49(val, _values, result) result = Node.new(:COMBINATOR, val) result end
# File lib/nokogiri/css/parser.rb, line 342 def _reduce_5(val, _values, result) result = :CHILD_SELECTOR result end
# File lib/nokogiri/css/parser.rb, line 630 def _reduce_50(val, _values, result) result = Node.new(:COMBINATOR, val) result end
# File lib/nokogiri/css/parser.rb, line 636 def _reduce_51(val, _values, result) result = Node.new(:COMBINATOR, val) result end
# File lib/nokogiri/css/parser.rb, line 642 def _reduce_52(val, _values, result) result = Node.new(:COMBINATOR, val) result end
reduce 57 omitted
# File lib/nokogiri/css/parser.rb, line 658 def _reduce_58(val, _values, result) result = Node.new(:ID, [unescape_css_identifier(val.first)]) result end
# File lib/nokogiri/css/parser.rb, line 663 def _reduce_59(val, _values, result) result = [val.first, val[1]] result end
# File lib/nokogiri/css/parser.rb, line 347 def _reduce_6(val, _values, result) result = :FOLLOWING_SELECTOR result end
# File lib/nokogiri/css/parser.rb, line 668 def _reduce_60(val, _values, result) result = [val.first, val[1]] result end
reduce 61 omitted
# File lib/nokogiri/css/parser.rb, line 675 def _reduce_62(val, _values, result) result = :equal result end
# File lib/nokogiri/css/parser.rb, line 680 def _reduce_63(val, _values, result) result = :prefix_match result end
# File lib/nokogiri/css/parser.rb, line 685 def _reduce_64(val, _values, result) result = :suffix_match result end
# File lib/nokogiri/css/parser.rb, line 690 def _reduce_65(val, _values, result) result = :substring_match result end
# File lib/nokogiri/css/parser.rb, line 695 def _reduce_66(val, _values, result) result = :not_equal result end
# File lib/nokogiri/css/parser.rb, line 700 def _reduce_67(val, _values, result) result = :includes result end
# File lib/nokogiri/css/parser.rb, line 705 def _reduce_68(val, _values, result) result = :dash_match result end
# File lib/nokogiri/css/parser.rb, line 710 def _reduce_69(val, _values, result) result = Node.new(:NOT, [val[1]]) result end
# File lib/nokogiri/css/parser.rb, line 352 def _reduce_7(val, _values, result) result = :DESCENDANT_SELECTOR result end
# File lib/nokogiri/css/parser.rb, line 357 def _reduce_8(val, _values, result) result = :CHILD_SELECTOR result end
# File lib/nokogiri/css/parser.rb, line 362 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 74 omitted
# File lib/nokogiri/css/parser.rb, line 726 def _reduce_none(val, _values, result) val[0] end
# File lib/nokogiri/css/parser_extras.rb, line 65 def next_token @tokenizer.next_token end
On CSS parser error, raise an exception
# File lib/nokogiri/css/parser_extras.rb, line 85 def on_error error_token_id, error_value, value_stack after = value_stack.compact.last raise SyntaxError.new("unexpected '#{error_value}' after '#{after}'") end
# File lib/nokogiri/css/parser_extras.rb, line 60 def parse string @tokenizer.scan_setup string do_parse end
# File lib/nokogiri/css/parser.rb, line 17 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
Get the xpath for string
using options
# File lib/nokogiri/css/parser_extras.rb, line 70 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
© 2008–2016 Aaron Patterson, Mike Dalessio, Charles Nutter, Sergio Arbeo
Patrick Mahoney, Yoko Harada, Akinori Musha, John Shahid
Licensed under the MIT License.