Class: Nokogiri::CSS::Parser
- Inherits:
-
Racc::Parser
- Object
- Racc::Parser
- Nokogiri::CSS::Parser
- Defined in:
- lib/nokogiri/css/parser.rb,
lib/nokogiri/css/parser_extras.rb
Constant Summary collapse
- Racc_arg =
[ racc_action_table, racc_action_check, racc_action_default, racc_action_pointer, racc_goto_table, racc_goto_check, racc_goto_default, racc_goto_pointer, racc_nt_base, racc_reduce_table, racc_token_table, racc_shift_n, racc_reduce_n, racc_use_result_var ]
- Racc_token_to_s_table =
[ "$end", "error", "FUNCTION", "INCLUDES", "DASHMATCH", "LBRACE", "HASH", "PLUS", "GREATER", "S", "STRING", "IDENT", "COMMA", "NUMBER", "PREFIXMATCH", "SUFFIXMATCH", "SUBSTRINGMATCH", "TILDE", "NOT_EQUAL", "SLASH", "DOUBLESLASH", "NOT", "EQUAL", "RPAREN", "LSQUARE", "RSQUARE", "HAS", "\".\"", "\"*\"", "\"|\"", "\":\"", "$start", "selector", "simple_selector_1toN", "prefixless_combinator_selector", "optional_S", "combinator", "simple_selector", "element_name", "hcap_0toN", "function", "pseudo", "attrib", "hcap_1toN", "class", "namespaced_ident", "namespace", "attrib_name", "attrib_val_0or1", "expr", "nth", "attribute_id", "negation", "eql_incl_dash", "negation_arg" ]
- Racc_debug_parser =
false
Class Attribute Summary collapse
-
.cache_on ⇒ Object
(also: cache_on?)
Turn on CSS parse caching.
Class Method Summary collapse
-
.[](string) ⇒ Object
Get the css selector in
string
from the cache. -
.[]=(string, value) ⇒ Object
Set the css selector in
string
in the cache tovalue
. -
.clear_cache ⇒ Object
Clear the cache.
-
.parse(selector) ⇒ Object
Parse this CSS selector in
selector
. -
.without_cache(&block) ⇒ Object
Execute
block
without cache.
Instance Method Summary collapse
-
#_reduce_1(val, _values, result) ⇒ Object
reduce 0 omitted.
-
#_reduce_11(val, _values, result) ⇒ Object
reduce 10 omitted.
- #_reduce_12(val, _values, result) ⇒ Object
- #_reduce_13(val, _values, result) ⇒ Object
- #_reduce_14(val, _values, result) ⇒ Object
- #_reduce_15(val, _values, result) ⇒ Object
- #_reduce_16(val, _values, result) ⇒ Object
-
#_reduce_18(val, _values, result) ⇒ Object
reduce 17 omitted.
- #_reduce_2(val, _values, result) ⇒ Object
-
#_reduce_20(val, _values, result) ⇒ Object
reduce 19 omitted.
- #_reduce_21(val, _values, result) ⇒ Object
- #_reduce_22(val, _values, result) ⇒ Object
- #_reduce_23(val, _values, result) ⇒ Object
-
#_reduce_25(val, _values, result) ⇒ Object
reduce 24 omitted.
- #_reduce_26(val, _values, result) ⇒ Object
- #_reduce_27(val, _values, result) ⇒ Object
- #_reduce_28(val, _values, result) ⇒ Object
- #_reduce_29(val, _values, result) ⇒ Object
- #_reduce_3(val, _values, result) ⇒ Object
- #_reduce_30(val, _values, result) ⇒ Object
- #_reduce_31(val, _values, result) ⇒ Object
- #_reduce_32(val, _values, result) ⇒ Object
- #_reduce_33(val, _values, result) ⇒ Object
- #_reduce_34(val, _values, result) ⇒ Object
- #_reduce_35(val, _values, result) ⇒ Object
- #_reduce_36(val, _values, result) ⇒ Object
- #_reduce_37(val, _values, result) ⇒ Object
- #_reduce_4(val, _values, result) ⇒ Object
-
#_reduce_40(val, _values, result) ⇒ Object
reduce 39 omitted.
- #_reduce_41(val, _values, result) ⇒ Object
- #_reduce_42(val, _values, result) ⇒ Object
- #_reduce_43(val, _values, result) ⇒ Object
- #_reduce_44(val, _values, result) ⇒ Object
- #_reduce_45(val, _values, result) ⇒ Object
-
#_reduce_48(val, _values, result) ⇒ Object
reduce 47 omitted.
- #_reduce_49(val, _values, result) ⇒ Object
- #_reduce_5(val, _values, result) ⇒ Object
- #_reduce_50(val, _values, result) ⇒ Object
- #_reduce_51(val, _values, result) ⇒ Object
- #_reduce_52(val, _values, result) ⇒ Object
-
#_reduce_58(val, _values, result) ⇒ Object
reduce 57 omitted.
- #_reduce_59(val, _values, result) ⇒ Object
- #_reduce_6(val, _values, result) ⇒ Object
- #_reduce_60(val, _values, result) ⇒ Object
- #_reduce_61(val, _values, result) ⇒ Object
-
#_reduce_63(val, _values, result) ⇒ Object
reduce 62 omitted.
- #_reduce_64(val, _values, result) ⇒ Object
- #_reduce_65(val, _values, result) ⇒ Object
- #_reduce_66(val, _values, result) ⇒ Object
- #_reduce_67(val, _values, result) ⇒ Object
- #_reduce_68(val, _values, result) ⇒ Object
- #_reduce_69(val, _values, result) ⇒ Object
- #_reduce_7(val, _values, result) ⇒ Object
- #_reduce_70(val, _values, result) ⇒ Object
- #_reduce_8(val, _values, result) ⇒ Object
- #_reduce_9(val, _values, result) ⇒ Object
-
#_reduce_none(val, _values, result) ⇒ Object
reduce 75 omitted.
-
#initialize(namespaces = {}) ⇒ Parser
constructor
Create a new CSS parser with respect to
namespaces
. - #next_token ⇒ Object
-
#on_error(error_token_id, error_value, value_stack) ⇒ Object
On CSS parser error, raise an exception.
- #parse(string) ⇒ Object
- #unescape_css_identifier(identifier) ⇒ Object
- #unescape_css_string(str) ⇒ Object
-
#xpath_for(string, options = {}) ⇒ Object
Get the xpath for
string
usingoptions
.
Constructor Details
Class Attribute Details
.cache_on ⇒ Object Also known as: cache_on?
Turn on CSS parse caching
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# File 'lib/nokogiri/css/parser_extras.rb', line 12 def cache_on @cache_on end |
Class Method Details
.[](string) ⇒ Object
Get the css selector in string
from the cache
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# File 'lib/nokogiri/css/parser_extras.rb', line 17 def [] string return unless @cache_on @mutex.synchronize { @cache[string] } end |
.[]=(string, value) ⇒ Object
Set the css selector in string
in the cache to value
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# File 'lib/nokogiri/css/parser_extras.rb', line 23 def []= string, value return value unless @cache_on @mutex.synchronize { @cache[string] = value } end |
.clear_cache ⇒ Object
Clear the cache
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# File 'lib/nokogiri/css/parser_extras.rb', line 29 def clear_cache @mutex.synchronize { @cache = {} } end |
.parse(selector) ⇒ Object
Parse this CSS selector in selector
. Returns an AST.
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# 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 |
.without_cache(&block) ⇒ Object
Execute block
without cache
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# 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 |
Instance Method Details
#_reduce_1(val, _values, result) ⇒ Object
reduce 0 omitted
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# File 'lib/nokogiri/css/parser.rb', line 334 def _reduce_1(val, _values, result) result = [val.first, val.last].flatten result end |
#_reduce_11(val, _values, result) ⇒ Object
reduce 10 omitted
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# File 'lib/nokogiri/css/parser.rb', line 387 def _reduce_11(val, _values, result) result = Node.new(:CONDITIONAL_SELECTOR, val) result end |
#_reduce_12(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 393 def _reduce_12(val, _values, result) result = Node.new(:CONDITIONAL_SELECTOR, val) result end |
#_reduce_13(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 399 def _reduce_13(val, _values, result) result = Node.new(:CONDITIONAL_SELECTOR, [Node.new(:ELEMENT_NAME, ['*']), val.first] ) result end |
#_reduce_14(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 407 def _reduce_14(val, _values, result) result = Node.new(val.first, [nil, val.last]) result end |
#_reduce_15(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 413 def _reduce_15(val, _values, result) result = Node.new(val[1], [val.first, val.last]) result end |
#_reduce_16(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 419 def _reduce_16(val, _values, result) result = Node.new(:DESCENDANT_SELECTOR, [val.first, val.last]) result end |
#_reduce_18(val, _values, result) ⇒ Object
reduce 17 omitted
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# File 'lib/nokogiri/css/parser.rb', line 427 def _reduce_18(val, _values, result) result = Node.new(:CLASS_CONDITION, [unescape_css_identifier(val[1])]) result end |
#_reduce_2(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 340 def _reduce_2(val, _values, result) result = val.flatten result end |
#_reduce_20(val, _values, result) ⇒ Object
reduce 19 omitted
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# File 'lib/nokogiri/css/parser.rb', line 434 def _reduce_20(val, _values, result) result = Node.new(:ELEMENT_NAME, val) result end |
#_reduce_21(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 439 def _reduce_21(val, _values, result) result = Node.new(:ELEMENT_NAME, [[val.first, val.last].compact.join(':')] ) result end |
#_reduce_22(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 447 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) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 454 def _reduce_23(val, _values, result) result = val[0] result end |
#_reduce_25(val, _values, result) ⇒ Object
reduce 24 omitted
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# File 'lib/nokogiri/css/parser.rb', line 461 def _reduce_25(val, _values, result) result = Node.new(:ATTRIBUTE_CONDITION, [val[1]] + (val[2] || []) ) result end |
#_reduce_26(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 469 def _reduce_26(val, _values, result) result = Node.new(:ATTRIBUTE_CONDITION, [val[1]] + (val[2] || []) ) result end |
#_reduce_27(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 477 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 |
#_reduce_28(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 486 def _reduce_28(val, _values, result) result = Node.new(:ELEMENT_NAME, [[val.first, val.last].compact.join(':')] ) result end |
#_reduce_29(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 494 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) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 345 def _reduce_3(val, _values, result) result = [val.last].flatten result end |
#_reduce_30(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 502 def _reduce_30(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip]) result end |
#_reduce_31(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 508 def _reduce_31(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end |
#_reduce_32(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 514 def _reduce_32(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end |
#_reduce_33(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 520 def _reduce_33(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end |
#_reduce_34(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 526 def _reduce_34(val, _values, result) result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten) result end |
#_reduce_35(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 532 def _reduce_35(val, _values, result) result = [val.first, val.last] result end |
#_reduce_36(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 537 def _reduce_36(val, _values, result) result = [val.first, val.last] result end |
#_reduce_37(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 542 def _reduce_37(val, _values, result) result = [val.first, val.last] result end |
#_reduce_4(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 350 def _reduce_4(val, _values, result) result = :DIRECT_ADJACENT_SELECTOR result end |
#_reduce_40(val, _values, result) ⇒ Object
reduce 39 omitted
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# File 'lib/nokogiri/css/parser.rb', line 551 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 |
#_reduce_41(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 570 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) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 580 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) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 596 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) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 616 def _reduce_44(val, _values, result) result = Node.new(:PSEUDO_CLASS, [val[1]]) result end |
#_reduce_45(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 622 def _reduce_45(val, _values, result) result = Node.new(:PSEUDO_CLASS, [val[1]]) result end |
#_reduce_48(val, _values, result) ⇒ Object
reduce 47 omitted
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# File 'lib/nokogiri/css/parser.rb', line 631 def _reduce_48(val, _values, result) result = Node.new(:COMBINATOR, val) result end |
#_reduce_49(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 637 def _reduce_49(val, _values, result) result = Node.new(:COMBINATOR, val) result end |
#_reduce_5(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 355 def _reduce_5(val, _values, result) result = :CHILD_SELECTOR result end |
#_reduce_50(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 643 def _reduce_50(val, _values, result) result = Node.new(:COMBINATOR, val) result end |
#_reduce_51(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 649 def _reduce_51(val, _values, result) result = Node.new(:COMBINATOR, val) result end |
#_reduce_52(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 655 def _reduce_52(val, _values, result) result = Node.new(:COMBINATOR, val) result end |
#_reduce_58(val, _values, result) ⇒ Object
reduce 57 omitted
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# File 'lib/nokogiri/css/parser.rb', line 671 def _reduce_58(val, _values, result) result = Node.new(:ID, [unescape_css_identifier(val.first)]) result end |
#_reduce_59(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 676 def _reduce_59(val, _values, result) result = [val.first, unescape_css_identifier(val[1])] result end |
#_reduce_6(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 360 def _reduce_6(val, _values, result) result = :FOLLOWING_SELECTOR result end |
#_reduce_60(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 681 def _reduce_60(val, _values, result) result = [val.first, unescape_css_string(val[1])] result end |
#_reduce_61(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 686 def _reduce_61(val, _values, result) result = [val.first, val[1]] result end |
#_reduce_63(val, _values, result) ⇒ Object
reduce 62 omitted
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# File 'lib/nokogiri/css/parser.rb', line 693 def _reduce_63(val, _values, result) result = :equal result end |
#_reduce_64(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 698 def _reduce_64(val, _values, result) result = :prefix_match result end |
#_reduce_65(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 703 def _reduce_65(val, _values, result) result = :suffix_match result end |
#_reduce_66(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 708 def _reduce_66(val, _values, result) result = :substring_match result end |
#_reduce_67(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 713 def _reduce_67(val, _values, result) result = :not_equal result end |
#_reduce_68(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 718 def _reduce_68(val, _values, result) result = :includes result end |
#_reduce_69(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 723 def _reduce_69(val, _values, result) result = :dash_match result end |
#_reduce_7(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 365 def _reduce_7(val, _values, result) result = :DESCENDANT_SELECTOR result end |
#_reduce_70(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 728 def _reduce_70(val, _values, result) result = Node.new(:NOT, [val[1]]) result end |
#_reduce_8(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 370 def _reduce_8(val, _values, result) result = :CHILD_SELECTOR result end |
#_reduce_9(val, _values, result) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 375 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) ⇒ Object
reduce 75 omitted
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# File 'lib/nokogiri/css/parser.rb', line 744 def _reduce_none(val, _values, result) val[0] end |
#next_token ⇒ Object
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# File 'lib/nokogiri/css/parser_extras.rb', line 65 def next_token @tokenizer.next_token end |
#on_error(error_token_id, error_value, value_stack) ⇒ Object
On CSS parser error, raise an exception
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# 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 |
#parse(string) ⇒ Object
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# File 'lib/nokogiri/css/parser_extras.rb', line 60 def parse string @tokenizer.scan_setup string do_parse end |
#unescape_css_identifier(identifier) ⇒ Object
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# 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 |
#unescape_css_string(str) ⇒ Object
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# File 'lib/nokogiri/css/parser.rb', line 21 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 = {}) ⇒ Object
Get the xpath for string
using options
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# File 'lib/nokogiri/css/parser_extras.rb', line 70 def xpath_for string, ={} key = "#{string}#{[:ns]}#{[:prefix]}" v = self.class[key] return v if v args = [ [:prefix] || '//', [:visitor] || XPathVisitor.new ] self.class[key] = parse(string).map { |ast| ast.to_xpath(*args) } end |