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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.
i����N( 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
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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 (
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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
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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 $=t substringmatchs *=t differents !=t ids xml:langs descendant-or-self::c s& d j � � f d � t | � D� � S( s� Translate a *group of selectors* to XPath.
Pseudo-elements are not supported here since XPath only knows
about "real" elements.
:param css:
A *group of selectors* as an Unicode string.
:param prefix:
This string is prepended to the XPath expression for each selector.
The default makes selectors scoped to the context node’s subtree.
:raises:
:class:`SelectorSyntaxError` on invalid selectors,
:class:`ExpressionError` on unknown/unsupported selectors,
including pseudo-elements.
:returns:
The equivalent XPath 1.0 expression as an Unicode string.
s | c 3 s' | ] } � j | � d t �Vq d S( t translate_pseudo_elementsN( t selector_to_xpatht True( t .0t selector( t prefixR ( s3 /usr/lib/python2.7/site-packages/cssselect/xpath.pys <genexpr>� s ( R$ 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�
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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
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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 <module>
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