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cssselect.parser
================
Tokenizer, parser and parsed objects for CSS selectors.
:copyright: (c) 2007-2012 Ian Bicking and contributors.
See AUTHORS for more details.
:license: BSD, see LICENSE for more details.
iNi i c C s | j d j j d S( s( Lower-case, but only in the ASCII range.t utf8( t encodet lowert decode( t string( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt ascii_lower s t
SelectorErrorc B s e Z d Z RS( s Common parent for :class:`SelectorSyntaxError` and
:class:`ExpressionError`.
You can just use ``except SelectorError:`` when calling
:meth:`~GenericTranslator.css_to_xpath` and handle both exceptions types.
( t __name__t
__module__t __doc__( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR ! s t SelectorSyntaxErrorc B s e Z d Z RS( s3 Parsing a selector that does not match the grammar.( R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR
* s t Selectorc B s, e Z d Z d d Z d Z d Z RS( s"
Represents a parsed selector.
:meth:`~GenericTranslator.selector_to_xpath` accepts this object,
but ignores :attr:`pseudo_element`. It is the user’s responsibility
to account for pseudo-elements and reject selectors with unknown
or unsupported pseudo-elements.
c C sA | | _ | d k r4 t | t r4 t | } n | | _ d S( N( t parsed_treet Nonet
isinstancet FunctionalPseudoElementR t pseudo_element( t selft treeR ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt __init__: s
c C s] t | j t r$ t | j } n | j r= d | j } n d } d | j j | j | f S( Ns ::%st s %s[%r%s]( R R R t reprt __class__R R ( R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt __repr__U s c C s; | j j \ } } } | j r. | d 7} n | | | f S( s Return the specificity_ of this selector as a tuple of 3 integers.
.. _specificity: http://www.w3.org/TR/selectors/#specificity
i ( R t specificityR ( R t at bt c( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR _ s
N( R R R R
R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR 0 s
t Classc B s) e Z d Z d Z d Z d Z RS( s(
Represents selector.class_name
c C s | | _ | | _ d S( N( t selectort
class_name( R R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR o s c C s d | j j | j | j f S( Ns %s[%r.%s]( R R R R ( R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s s c C s/ | j j \ } } } | d 7} | | | f S( Ni ( R R ( R R R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR w s
( R R R R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR k s R c B s2 e Z d Z d Z d Z d Z d Z RS( sx
Represents selector::name(arguments)
.. attribute:: name
The name (identifier) of the pseudo-element, as a string.
.. attribute:: arguments
The arguments of the pseudo-element, as a list of tokens.
**Note:** tokens are not part of the public API,
and may change between cssselect versions.
Use at your own risks.
c C s t | | _ | | _ d S( N( R t namet arguments( R R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s3 d | j j | j g | j D] } | j ^ q f S( Ns %s[::%s(%r)]( R R R R t value( R t token( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s g | j D] } | j ^ q
S( N( R t type( R R" ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt argument_types s c C s/ | j j \ } } } | d 7} | | | f S( Ni ( R R ( R R R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s
( R R R R R R$ R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR } s
t Functionc B s2 e Z d Z d Z d Z d Z d Z RS( s(
Represents selector:name(expr)
c C s% | | _ t | | _ | | _ d S( N( R R R R ( R R R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s9 d | j j | j | j g | j D] } | j ^ q" f S( Ns
%s[%r:%s(%r)]( R R R R R R! ( R R" ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s g | j D] } | j ^ q
S( N( R R# ( R R" ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR$ s c C s/ | j j \ } } } | d 7} | | | f S( Ni ( R R ( R R R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s
( R R R R R R$ R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR% s
t Pseudoc B s) e Z d Z d Z d Z d Z RS( s#
Represents selector:ident
c C s | | _ t | | _ d S( N( R R t ident( R R R' ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s d | j j | j | j f S( Ns %s[%r:%s]( R R R R' ( R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s/ | j j \ } } } | d 7} | | | f S( Ni ( R R ( R R R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s
( R R R R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR& s t Negationc B s) e Z d Z d Z d Z d Z RS( s.
Represents selector:not(subselector)
c C s | | _ | | _ d S( N( R t subselector( R R R) ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s d | j j | j | j f S( Ns %s[%r:not(%r)]( R R R R) ( R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C sI | j j \ } } } | j j \ } } } | | | | | | f S( N( R R R) ( R t a1t b1t c1t a2t b2t c2( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s ( R R R R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR( s t Attribc B s) e Z d Z d Z d Z d Z RS( s>
Represents selector[namespace|attrib operator value]
c C s1 | | _ | | _ | | _ | | _ | | _ d S( N( R t namespacet attribt operatorR! ( R R R1 R2 R3 R! ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s
c C s~ | j r" d | j | j f } n | j } | j d k rT d | j j | j | f Sd | j j | j | | j | j f Sd S( Ns %s|%st existss
%s[%r[%s]]s %s[%r[%s %s %r]]( R1 R2 R3 R R R R! ( R R2 ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s/ | j j \ } } } | d 7} | | | f S( Ni ( R R ( R R R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s
( R R R R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR0 s
t Elementc B s/ e Z d Z d d d Z d Z d Z RS( sU
Represents namespace|element
`None` is for the universal selector '*'
c C s | | _ | | _ d S( N( R1 t element( R R1 R6 ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C sB | j p d } | j r. d | j | f } n d | j j | f S( Nt *s %s|%ss %s[%s]( R6 R1 R R ( R R6 ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s | j r
d Sd Sd S( Ni i ( i i i ( i i i ( R6 ( R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR
s N( R R R R
R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR5 s t Hashc B s) e Z d Z d Z d Z d Z RS( s
Represents selector#id
c C s | | _ | | _ d S( N( R t id( R R R9 ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s d | j j | j | j f S( Ns %s[%r#%s]( R R R R9 ( R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s c C s/ | j j \ } } } | d 7} | | | f S( Ni ( R R ( R R R R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s
( R R R R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR8 s t CombinedSelectorc B s# e Z d Z d Z d Z RS( c C s | | _ | | _ | | _ d S( N( R t
combinatorR) ( R R R; R) ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR $ s c C sA | j d k r d } n | j } d | j j | j | | j f S( Nt s
s %s[%r %s %r]( R; R R R R) ( R t comb( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR * s
c C sI | j j \ } } } | j j \ } } } | | | | | | f S( N( R R R) ( R R* R+ R, R- R. R/ ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR 2 s ( R R R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR: # s s% ^[ \t\r\n\f]*([a-zA-Z]+)[ \t\r\n\f]*$s6 ^[ \t\r\n\f]*([a-zA-Z]*)#([a-zA-Z0-9_-]+)[ \t\r\n\f]*$s? ^[ \t\r\n\f]*([a-zA-Z]*)\.([a-zA-Z][a-zA-Z0-9_-]*)[ \t\r\n\f]*$c C s t j | } | r4 t t d | j d g St j | } | d k r t t t d | j d pm d | j d g St j | } | d k r t t t d | j d p d | j d g St
t | } | | _ t
t | S( s Parse a CSS *group of selectors*.
If you don't care about pseudo-elements or selector specificity,
you can skip this and use :meth:`~GenericTranslator.css_to_xpath`.
:param css:
A *group of selectors* as an Unicode string.
:raises:
:class:`SelectorSyntaxError` on invalid selectors.
:returns:
A list of parsed :class:`Selector` objects, one for each
selector in the comma-separated group.
R6 i i N( t _el_ret matchR R5 t groupt _id_reR
R8 t _class_reR t TokenStreamt tokenizet sourcet listt parse_selector_group( t cssR? t stream( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt parseE s ! ! c c sP | j x? t t | V| j d k rG | j | j q
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Wd S( Nt DELIMt ,( RK RL ( t skip_whitespaceR t parse_selectort peekt next( RI ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyRG o s
c C s t | \ } } x | j | j } | d d
f k rA Pn | rZ t d | n | j d d d r | j j } | j n d } t | \ } } t | | | } q W| | f S( Nt EOFRK RL s4 Got pseudo-element ::%s not at the end of a selectort +t >t ~R< ( RQ N( RK RL ( t parse_simple_selectorRM RO R
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t is_delimRP R! R: ( RI t resultR RO R; t
next_selector( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyRN y s"
c C s | j t | j } | j } | j d k s@ | d k r | j d k ra | j j } n | j d } | j d k r | j | j } q | } d } n
d } } t | | } d } x| j } | j d k s| j
d d d d
s| r| d k rPn | r/t d | n | j d
k rYt | | j j } q | d k r| j t
| | j } q | d! k r| j t | | } q | d" k rN| j | j d# k r'| j | j } | j d$ k r | j t | t | } q q n | j } | j d% k rWt | } q n | j d& k r~t | | } q n | j | j | j d k r3| rt d n t | d t \ } }
| j } |
rt d |
| j f n | d' k r!t d | f n t | | } qat | | t | } q t d | f q Wt | j | k rt d | j f n | | f S(( Nt IDENTRK R7 t |t SRQ RL RR RS RT t )s4 Got pseudo-element ::%s not at the end of a selectort HASHt .t [t :t (s
first-lines first-lettert beforet aftert nots Got nested :not()t inside_negations+ Got pseudo-element ::%s inside :not() at %ss Expected ')', got %ss Expected selector, got %s( RK R7 ( RK RZ ( R[ RQ ( RK R\ ( RK R^ ( RK R_ ( RK R` ( RK R` ( RK Ra ( s
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c C s{ g } xn | j | j } | j d k s@ | d
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c C s | j | j } | d k rP | j d k rP t d | j f n | j d k r | j | j d k r d } | j d } q | } | j } d } n
d } } | d k ru| j | j } | d k r t | | | d d S| d k rd } qu| j d d d
d d d r_| j d k r_| j d } | j qut d
| f n | j | j } | j
d k rt d | f n | j | j } | d k rt d | f n t | | | | | j S( NRK RZ s Expected '|', got %st =s |=t ]R4 t ^t $R7 RT t !s Operator expected, got %sRY Rr s Expected string or ident, got %ss Expected ']', got %s( RK RZ ( RK RZ ( RK Rv ( RK Rw ( RK Rv ( RK Rv ( RY Rr ( RK Rw ( RM Rh R
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c C s x, | D]$ } | j d k r t d q q Wd j d | D j } | d k r^ d S| d k rn d S| d
k r~ d Sd
| k r d t | f S| j d
d \ } } | s d } n7 | d k s | d k r t | d
} n t | } | sd } n t | } | | f S( sv
Parses the arguments for :nth-child() and friends.
:raises: A list of tokens
:returns: :``(a, b)``
Rr s$ String tokens not allowed in series.R c s s | ] } | j Vq d S( N( R! ( t .0R" ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pys + s t oddi i t eveni t nRt RR t 1( i i ( i i ( i i ( R# t
ValueErrort joint stript intt split( t tokensR" t sR R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt parse_series s,
t Tokenc B sM e Z d Z d Z d Z e e j d Z e e j d Z RS( c C s% t j | | | f } | | _ | S( N( t tuplet __new__Rn ( t clst type_R! Rn t obj( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR F s c C s d | j | j | j f S( Ns <%s '%s' at %i>( R# R! Rn ( R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR K s c G s | j d k o | j | k S( NRK ( R# R! ( R t values( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyRV N s i i (
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itemgetterR# R! ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR E s
t EOFTokenc B s e Z d Z d Z RS( c C s t j | d d | S( NRQ ( R R R
( R Rn ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR V s c C s d | j | j f S( Ns
<%s at %i>( R# Rn ( R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR Y s ( R R R R ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR U s t TokenMacrosc B sH e Z d Z e d Z d e Z d Z d e e f Z d e e f Z RS( s& \\([0-9a-f]{1,6})(?:\r\n|[ \n\r\t\f])?s |\\[^\n\r\f0-9a-f]s \\(?:\n|\r\n|\r|\f)|s
[^\0-\177]s [_a-z0-9-]|%s|%ss [_a-z]|%s|%s( R R t unicode_escapet escapet
string_escapet nonasciit nmchart nmstart( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR ` s
c C s t j | t t t j j S( N( t ret compilet varsR t
IGNORECASER? ( t pattern( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt _compileh s s [ \t\r\n\f]+s [+-]?(?:[0-9]*\.[0-9]+|[0-9]+)s #(?:%(nmchar)s)+s -?(?:%(nmstart)s)(?:%(nmchar)s)*s! ([^\n\r\f\\']|%(string_escape)s)*t 's! ([^\n\r\f\\"]|%(string_escape)s)*t "s \\(.)s \\(?:\n|\r\n|\r|\f)t methodcallerR@ i c C s
| j d S( Ni ( R@ ( R? ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt _replace_simple} s c C s: t | j d d } | t j k r0 d } n t | S( Ni i i ( R R@ t syst
maxunicodet _unichr( R? t codepoint( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt _replace_unicode s c C s" t t | } t t | } | S( N( t _sub_unicode_escapeR t _sub_simple_escapeR ( R! ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt unescape_ident s c c s d } t | } x| | k rt | d | } | r\ t d d | V| j } q n t | d | } | r t t t t | j } t d | | V| j } q n t
| d | } | rt t t t | j d } t d | | V| j } q n | | } | t k rt | | d | d } | j } | | k rmt d | n | | | k rt d | n t t t t t
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7} q n t d | | | V| d 7} q Wt | Vd S( Ni Rn R[ R< RY i R] s Unclosed string at %ss Invalid string at %sR Rr Rs i s /*s */iRK ( Rf t _match_whitespaceR t endt _match_identR R R R R@ t _match_hasht _match_string_by_quoteR
t _sub_newline_escapet
_match_numbert findR ( R Rn t len_sR? R! t quotet end_post pos2( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyRD sh
RC c B sA e Z d d Z d Z d Z d Z d Z d Z RS( c C sm g | _ t | | _ | | _ d | _ t | _ y | j j | _ Wn t
k
rh | j j | _ n Xd S( N( Rg t iterR RE R
t peekedt Falset _peekingRP t
next_tokent AttributeErrort __next__( R R RE ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyR s
c C sP | j r, t | _ | j j | j | j S| j } | j j | | Sd S( N( R R Rg Ru R R ( R RP ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyRP s c C s+ | j s$ | j | _ t | _ n | j S( N( R R R Rm ( R ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyRO s c C s8 | j } | j d k r1 t d | f n | j S( NRY s Expected ident, got %s( RP R# R
R! ( R RP ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyRi s c C sI | j } | j d k r" | j S| d k r2 d St d | f d S( NRY RK R7 s Expected ident or '*', got %s( RK R7 ( RP R# R! R
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( (> R R R R3 t version_infot unicodeRl t unichrR t strt chrR t ExceptionR t SyntaxErrorR
t objectR R R R% R& R( R0 R5 R8 R: R R> RA RB RJ RG RN R RU Rk Rj R R R R R R R R R R R t subR R t IR R t hasattrR R R R RD RC ( ( ( s4 /usr/lib/python2.7/site-packages/cssselect/parser.pyt
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