/usr/lib/ruby/vendor_ruby/nokogiri/css/parser.y is in ruby-nokogiri 1.6.7.2-3build1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 | class Nokogiri::CSS::Parser
token FUNCTION INCLUDES DASHMATCH LBRACE HASH PLUS GREATER S STRING IDENT
token COMMA NUMBER PREFIXMATCH SUFFIXMATCH SUBSTRINGMATCH TILDE NOT_EQUAL
token SLASH DOUBLESLASH NOT EQUAL RPAREN LSQUARE RSQUARE HAS
rule
selector
: selector COMMA simple_selector_1toN {
result = [val.first, val.last].flatten
}
| prefixless_combinator_selector { result = val.flatten }
| optional_S simple_selector_1toN { result = [val.last].flatten }
;
combinator
: PLUS { result = :DIRECT_ADJACENT_SELECTOR }
| GREATER { result = :CHILD_SELECTOR }
| TILDE { result = :FOLLOWING_SELECTOR }
| DOUBLESLASH { result = :DESCENDANT_SELECTOR }
| SLASH { result = :CHILD_SELECTOR }
;
simple_selector
: element_name hcap_0toN {
result = if val[1].nil?
val.first
else
Node.new(:CONDITIONAL_SELECTOR, [val.first, val[1]])
end
}
| function
| function pseudo {
result = Node.new(:CONDITIONAL_SELECTOR, val)
}
| function attrib {
result = Node.new(:CONDITIONAL_SELECTOR, val)
}
| hcap_1toN {
result = Node.new(:CONDITIONAL_SELECTOR,
[Node.new(:ELEMENT_NAME, ['*']), val.first]
)
}
;
prefixless_combinator_selector
: combinator simple_selector_1toN {
result = Node.new(val.first, [nil, val.last])
}
;
simple_selector_1toN
: simple_selector combinator simple_selector_1toN {
result = Node.new(val[1], [val.first, val.last])
}
| simple_selector S simple_selector_1toN {
result = Node.new(:DESCENDANT_SELECTOR, [val.first, val.last])
}
| simple_selector
;
class
: '.' IDENT { result = Node.new(:CLASS_CONDITION, [val[1]]) }
;
element_name
: namespaced_ident
| '*' { result = Node.new(:ELEMENT_NAME, val) }
;
namespaced_ident
: namespace '|' IDENT {
result = Node.new(:ELEMENT_NAME,
[[val.first, val.last].compact.join(':')]
)
}
| IDENT {
name = @namespaces.key?('xmlns') ? "xmlns:#{val.first}" : val.first
result = Node.new(:ELEMENT_NAME, [name])
}
;
namespace
: IDENT { result = val[0] }
|
;
attrib
: LSQUARE attrib_name attrib_val_0or1 RSQUARE {
result = Node.new(:ATTRIBUTE_CONDITION,
[val[1]] + (val[2] || [])
)
}
| LSQUARE function attrib_val_0or1 RSQUARE {
result = Node.new(:ATTRIBUTE_CONDITION,
[val[1]] + (val[2] || [])
)
}
| LSQUARE NUMBER RSQUARE {
# Non standard, but hpricot supports it.
result = Node.new(:PSEUDO_CLASS,
[Node.new(:FUNCTION, ['nth-child(', val[1]])]
)
}
;
attrib_name
: namespace '|' IDENT {
result = Node.new(:ELEMENT_NAME,
[[val.first, val.last].compact.join(':')]
)
}
| IDENT {
# 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])
}
;
function
: FUNCTION RPAREN {
result = Node.new(:FUNCTION, [val.first.strip])
}
| FUNCTION expr RPAREN {
result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten)
}
| FUNCTION nth RPAREN {
result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten)
}
| NOT expr RPAREN {
result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten)
}
| HAS selector RPAREN {
result = Node.new(:FUNCTION, [val.first.strip, val[1]].flatten)
}
;
expr
: NUMBER COMMA expr { result = [val.first, val.last] }
| STRING COMMA expr { result = [val.first, val.last] }
| IDENT COMMA expr { result = [val.first, val.last] }
| NUMBER
| STRING
| IDENT # even, odd
{
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
}
;
nth
: NUMBER IDENT PLUS NUMBER # 5n+3 -5n+3
{
if val[1] == 'n'
result = Node.new(:NTH, val)
else
raise Racc::ParseError, "parse error on IDENT '#{val[1]}'"
end
}
| IDENT PLUS NUMBER { # 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
}
| NUMBER IDENT { # 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
}
;
pseudo
: ':' function {
result = Node.new(:PSEUDO_CLASS, [val[1]])
}
| ':' IDENT { result = Node.new(:PSEUDO_CLASS, [val[1]]) }
;
hcap_0toN
: hcap_1toN
|
;
hcap_1toN
: attribute_id hcap_1toN {
result = Node.new(:COMBINATOR, val)
}
| class hcap_1toN {
result = Node.new(:COMBINATOR, val)
}
| attrib hcap_1toN {
result = Node.new(:COMBINATOR, val)
}
| pseudo hcap_1toN {
result = Node.new(:COMBINATOR, val)
}
| negation hcap_1toN {
result = Node.new(:COMBINATOR, val)
}
| attribute_id
| class
| attrib
| pseudo
| negation
;
attribute_id
: HASH { result = Node.new(:ID, val) }
;
attrib_val_0or1
: eql_incl_dash IDENT { result = [val.first, val[1]] }
| eql_incl_dash STRING { result = [val.first, val[1]] }
|
;
eql_incl_dash
: EQUAL { result = :equal }
| PREFIXMATCH { result = :prefix_match }
| SUFFIXMATCH { result = :suffix_match }
| SUBSTRINGMATCH { result = :substring_match }
| NOT_EQUAL { result = :not_equal }
| INCLUDES { result = :includes }
| DASHMATCH { result = :dash_match }
;
negation
: NOT negation_arg RPAREN {
result = Node.new(:NOT, [val[1]])
}
;
negation_arg
: element_name
| element_name hcap_1toN
| hcap_1toN
;
optional_S
: S
|
;
end
---- header
require 'nokogiri/css/parser_extras'
|