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cssselect.xpath
===============
Translation of parsed CSS selectors to XPath expressions.
:copyright: (c) 2007-2012 Ian Bicking and contributors.
See AUTHORS for more details.
:license: BSD, see LICENSE for more details.
iN( t parset parse_seriest
SelectorErrori i c C s+ | j d d j d } t | | | S( Nt asciit replace( t encodet decodet getattr( t objt namet default( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt _unicode_safe_getattr s t ExpressionErrorc B s e Z d Z RS( s3 Unknown or unsupported selector (eg. pseudo-class).( t __name__t
__module__t __doc__( ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR # s t XPathExprc B sS e Z d d d e d Z d Z d Z d Z d Z d Z d Z RS( t t *c C s | | _ | | _ | | _ d S( N( t patht elementt condition( t selfR R R t star_prefix( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt __init__+ s c C s= t | j t | j } | j r9 | d | j 7} n | S( Ns [%s]( t _unicodeR R R ( R R ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt __str__0 s c C s d | j j | f S( Ns %s[%s]( t __class__R
( R ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt __repr__6 s c C s/ | j r" d | j | f | _ n | | _ | S( Ns %s and (%s)( R ( R R ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt
add_condition9 s c C s= | j d k r d S| j d t j | j d | _ d S( NR s name() = %s( R R t GenericTranslatort
xpath_literal( R ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt
add_name_test@ s
c C s | j d 7_ d S( se
Append '*/' to the path to keep the context constrained
to a single parent.
s */N( R ( R ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt add_star_prefixH s c C sT t | | } | j d k r/ | | j 7} n | | _ | j | _ | j | _ | S( Ns */( R R R R ( R t combinert otherR ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt joinO s (
R
R t FalseR R R R R R! R$ ( ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR ) s s ('+)s ^[a-zA-Z_][a-zA-Z0-9_.-]*$s ^[^ \t\r\n\f]+$R c B sE e Z d Z i d d 6d d 6d d 6d d 6Z i d d 6d
d 6d d
6d d 6d d 6d d 6d d 6d d 6Z d Z d Z e Z e Z e Z
e Z d d Z
d e d Z d Z e d Z d Z d Z d! Z d" Z d# Z d$ Z d% Z d& Z d' Z d( Z d) Z d* Z d+ Z e e d, Z d- Z! d. Z" d/ Z# d0 Z$ d1 Z% d2 Z& d3 Z' d4 Z( d5 Z) d6 Z* d7 Z+ d8 Z, d9 Z- d: Z. e. Z/ e. Z0 e. Z1 e. Z2 e. Z3 e. Z4 e. Z5 e. Z6 e. Z7 d; Z8 d< Z9 d= Z: d> Z; d? Z< d@ Z= dA Z> dB Z? RS(C s
Translator for "generic" XML documents.
Everything is case-sensitive, no assumption is made on the meaning
of element names and attribute names.
t
descendantt t childt >t direct_adjacentt +t indirect_adjacentt ~t existst equalst =t includess ~=t dashmatchs |=t prefixmatchs ^=t suffixmatchs $=t substringmatchs *=t differents !=t ids xml:langs descendant-or-self::c s& d j f d t | D S( s Translate a *group of selectors* to XPath.
Pseudo-elements are not supported here since XPath only knows
about "real" elements.
:param css:
A *group of selectors* as an Unicode string.
:param prefix:
This string is prepended to the XPath expression for each selector.
The default makes selectors scoped to the context node’s subtree.
:raises:
:class:`SelectorSyntaxError` on invalid selectors,
:class:`ExpressionError` on unknown/unsupported selectors,
including pseudo-elements.
:returns:
The equivalent XPath 1.0 expression as an Unicode string.
s | c 3 s' | ] } j | d t Vq d S( t translate_pseudo_elementsN( t selector_to_xpatht True( t .0t selector( t prefixR ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pys s ( R$ R ( R t cssR= ( ( R= R s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt css_to_xpath s c C sx t | d d } | s. t d | f n | j | } | rd | j rd | j | | j } n | pm d t | S( s4 Translate a parsed selector to XPath.
:param selector:
A parsed :class:`Selector` object.
:param prefix:
This string is prepended to the resulting XPath expression.
The default makes selectors scoped to the context node’s subtree.
:param translate_pseudo_elements:
Unless this is set to ``True`` (as :meth:`css_to_xpath` does),
the :attr:`~Selector.pseudo_element` attribute of the selector
is ignored.
It is the caller's responsibility to reject selectors
with pseudo-elements, or to account for them somehow.
:raises:
:class:`ExpressionError` on unknown/unsupported selectors.
:returns:
The equivalent XPath 1.0 expression as an Unicode string.
t parsed_trees" Expected a parsed selector, got %rR N( R t Nonet TypeErrort xpatht pseudo_elementt xpath_pseudo_elementR ( R R< R= R8 t treeRC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR9 s c C s t d d S( s Translate a pseudo-element.
Defaults to not supporting pseudo-elements at all,
but can be overridden by sub-classes.
s" Pseudo-elements are not supported.N( R ( R RC RD ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyRE s c C s t | } d | k r% d | } na d | k r> d | } nH d d j g t | D]( } | rT d | k rr d pu d | ^ qT } | S( Nt 's '%s't "s "%s"s
concat(%s)t ,( R R$ t split_at_single_quotes( t st part( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR s
<c C sT t | j } t | d | j d } | d k rJ t d | n | | S( s% Translate any parsed selector object.s xpath_%ss %s is not supported.N( t typeR
R t lowerRA R ( R t parsed_selectort type_namet method( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyRC s
c C sH | j | j } t | d | } | | j | j | j | j S( s Translate a combined selector.s xpath_%s_combinator( t combinator_mappingt
combinatorR RC R< t subselector( R t combinedRS RQ ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_combinedselector s c C s\ | j | j } | j | j } | j | j rK | j d | j S| j d Sd S( Ns not(%s)t 0( RC R< RT R R R ( R t negationRC t sub_xpath( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_negation
s
c C s` d | j j d d } t | | d } | sG t d | j n | | j | j | S( s$ Translate a functional pseudo-class.s xpath_%s_functiont -t _s! The pseudo-class :%s() is unknownN( R R R RA R RC R< ( R t functionRQ ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_function s c C s] d | j j d d } t | | d } | sG t d | j n | | j | j S( s Translate a pseudo-class.s xpath_%s_pseudoR[ R\ s The pseudo-class :%s is unknownN( t identR R RA R RC R< ( R t pseudoRQ ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_pseudo s c C s | j | j } t | d | } | j r> | j j } n | j } t | } | j r d | j | f } | o t | j } n | r d | } n d | j | } | j r | j
j } n | j
} | | j | j | | S( s Translate an attribute selector.s xpath_attrib_%ss %s:%st @s attribute::*[name() = %s](
t attribute_operator_mappingt operatorR t lower_case_attribute_namest attribRN t is_safe_namet namespaceR t lower_case_attribute_valuest valueRC R< ( R R< Rd RQ R t safeRf Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_attrib' s
c C s( | j | j } | j | d | j S( s Translate a class selector.s @class( RC R< t xpath_attrib_includest
class_name( R t class_selectorRC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_class= s c C s( | j | j } | j | d | j S( s Translate an ID selector.s @id( RC R< t xpath_attrib_equalsR7 ( R t id_selectorRC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt
xpath_hashD s c C s | j } | s d } t } n$ t | } | j rB | j } n | j rv d | j | f } | op t | j } n | j d | } | s | j n | S( s' Translate a type or universal selector.R s %s:%sR ( R R: Rg t lower_case_element_namesRN Rh t
xpathexpr_clsR ( R R< R Rk RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt
xpath_elementI s
c C s | j d | S( s; right is a child, grand-child or further descendant of lefts /descendant-or-self::*/( R$ ( R t leftt right( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_descendant_combinator` s c C s | j d | S( s# right is an immediate child of leftt /( R$ ( R Rw Rx ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_child_combinatord s c C s) | j d | } | j | j d S( s) right is a sibling immediately after lefts /following-sibling::s position() = 1( R$ R R ( R Rw Rx RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_direct_adjacent_combinatorh s
c C s | j d | S( s1 right is a sibling after left, immediately or nots /following-sibling::( R$ ( R Rw Rx ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt" xpath_indirect_adjacent_combinatorn s c C sb y t | j \ } } Wn$ t k
r? t d | j n X| rS | j n | j | d k r | r| d | } n | j d | S| r | } | } n | d k r t | } n d | } | d k r d | | f g } n g } | d k r| j d | n& | d k r9| r9| j d | n d
j | } | r^| j | n | S( Ns Invalid series: '%r'i s last() - %ss position() = %ss +%si s (position() %s) mod %s = 0s position() >= %ss position() < (last() %s)s and (
R t argumentst
ValueErrorR R R! R t strt appendR$ ( R RC R] t lastR t at bt b_negt expr( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_nth_child_functionu s8
c C s | j | | d t S( NR ( R R: ( R RC R] ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_nth_last_child_function s c C s4 | j d k r t d n | j | | d t S( NR s" *:nth-of-type() is not implementedR ( R R R R% ( R RC R] ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_nth_of_type_function s
c C s: | j d k r t d n | j | | d t d t S( NR s" *:nth-of-type() is not implementedR R ( R R R R: R% ( R RC R] ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_nth_last_of_type_function s
c C s^ | j d g d g f k r4 t d | j n | j d j } | j d | j | S( Nt STRINGt IDENTs9 Expected a single string or ident for :contains(), got %ri s contains(., %s)( t argument_typesR R~ Rj R R ( R RC R] Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_contains_function s c C s^ | j d g d g f k r4 t d | j n | j d j } | j d | j | S( NR R s5 Expected a single string or ident for :lang(), got %ri s lang(%s)( R R R~ Rj R R ( R RC R] Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_lang_function s c C s
| j d S( Ns not(parent::*)( R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_root_pseudo s c C s! | j | j | j d S( Ns position() = 1( R! R R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_first_child_pseudo s
c C s! | j | j | j d S( Ns position() = last()( R! R R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_last_child_pseudo s
c C s5 | j d k r t d n | j | j d S( NR s" *:first-of-type is not implementeds position() = 1( R R R! R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_first_of_type_pseudo s
c C s5 | j d k r t d n | j | j d S( NR s! *:last-of-type is not implementeds position() = last()( R R R! R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_last_of_type_pseudo s
c C s! | j | j | j d S( Ns
last() = 1( R R! R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_only_child_pseudo s
c C s+ | j d k r t d n | j d S( NR s! *:only-of-type is not implementeds
last() = 1( R R R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_only_of_type_pseudo s c C s
| j d S( Ns not(*) and not(string-length())( R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_empty_pseudo s c C s
| j d S( s: Common implementation for pseudo-classes that never match.RW ( R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt pseudo_never_matches s c C s | j | | S( N( R ( R RC R Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_attrib_exists s
c C s$ | j d | | j | f | S( Ns %s = %s( R R ( R RC R Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyRq s c C sP | r, | j d | | | j | f n | j d | | j | f | S( Ns not(%s) or %s != %ss %s != %s( R R ( R RC R Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_attrib_different s c C sK t | r: | j d | | | j d | d f n
| j d | S( Ns: %s and contains(concat(' ', normalize-space(%s), ' '), %s)R' RW ( t is_non_whitespaceR R ( R RC R Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyRm s %
c C s: | j d | | | j | | | j | d f | S( Ns' %s and (%s = %s or starts-with(%s, %s))R[ ( R R ( R RC R Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_attrib_dashmatch s
c C s= | r, | j d | | | j | f n
| j d | S( Ns %s and starts-with(%s, %s)RW ( R R ( R RC R Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_attrib_prefixmatch# s
c C sM | r< | j d | | | t | d | j | f n
| j d | S( Ns/ %s and substring(%s, string-length(%s)-%s) = %si RW ( R t lenR ( R RC R Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_attrib_suffixmatch+ s -
c C s= | r, | j d | | | j | f n
| j d | S( Ns %s and contains(%s, %s)RW ( R R ( R RC R Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt xpath_attrib_substringmatch5 s
(@ R
R R RR Rc t id_attributet lang_attributeR% Rt Re Ri R Ru R? R9 RE t staticmethodR RC RV RZ R^ Ra Rl Rp Rs Rv Ry R{ R| R} R: R R R R R R R R R R R R R R R t xpath_link_pseudot xpath_visited_pseudot xpath_hover_pseudot xpath_active_pseudot xpath_focus_pseudot xpath_target_pseudot xpath_enabled_pseudot xpath_disabled_pseudot xpath_checked_pseudoR Rq R Rm R R R R ( ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR g s
(
t HTMLTranslatorc B sM e Z d Z d Z e d Z d Z d Z d Z d Z d Z
RS( s
Translator for (X)HTML documents.
Has a more useful implementation of some pseudo-classes based on
HTML-specific element names and attribute names, as described in
the `HTML5 specification`_. It assumes no-quirks mode.
The API is the same as :class:`GenericTranslator`.
.. _HTML5 specification: http://www.w3.org/TR/html5/links.html#selectors
:param xhtml:
If false (the default), element names and attribute names
are case-insensitive.
t langc C s( | | _ | s$ t | _ t | _ n d S( N( t xhtmlR: Rt Re ( R R ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR R s c C s
| j d S( Ns (@selected and name(.) = 'option') or (@checked and (name(.) = 'input' or name(.) = 'command')and (@type = 'checkbox' or @type = 'radio'))( R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR Y s c C sq | j d g d g f k r4 t d | j n | j d j } | j d | j | j | j d f S( NR R s5 Expected a single string or ident for :lang(), got %ri s ancestor-or-self::*[@lang][1][starts-with(concat(translate(@%s, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), '-'), %s)]R[ ( R R R~ Rj R R R RN ( R RC R] Rj ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR a s c C s
| j d S( NsA @href and (name(.) = 'a' or name(.) = 'link' or name(.) = 'area')( R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR o s c C s
| j d S( Ns
(
@disabled and
(
(name(.) = 'input' and @type != 'hidden') or
name(.) = 'button' or
name(.) = 'select' or
name(.) = 'textarea' or
name(.) = 'command' or
name(.) = 'fieldset' or
name(.) = 'optgroup' or
name(.) = 'option'
)
) or (
(
(name(.) = 'input' and @type != 'hidden') or
name(.) = 'button' or
name(.) = 'select' or
name(.) = 'textarea'
)
and ancestor::fieldset[@disabled]
)
( R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR v s c C s
| j d S( Ns'
(
@href and (
name(.) = 'a' or
name(.) = 'link' or
name(.) = 'area'
)
) or (
(
name(.) = 'command' or
name(.) = 'fieldset' or
name(.) = 'optgroup'
)
and not(@disabled)
) or (
(
(name(.) = 'input' and @type != 'hidden') or
name(.) = 'button' or
name(.) = 'select' or
name(.) = 'textarea' or
name(.) = 'keygen'
)
and not (@disabled or ancestor::fieldset[@disabled])
) or (
name(.) = 'option' and not(
@disabled or ancestor::optgroup[@disabled]
)
)
( R ( R RC ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR s ( R
R R R R% R R R R R R ( ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyR ? s ( R t syst ret cssselect.parserR R R t version_infot
basestringt _basestringt unicodeR R RA R t RuntimeErrorR t objectR t compilet splitRJ t matchRg R R R ( ( ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pyt
s" 1