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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.
� N)�parse� parse_series�
SelectorError� c C s |� dd��d�}t| ||�S )N�ascii�replace)�encode�decode�getattr)�obj�name�default� r �@/opt/alt/python37/lib/python3.7/site-packages/cssselect/xpath.py�_unicode_safe_getattr s r c @ s e Zd ZdZdS )�ExpressionErrorz3Unknown or unsupported selector (eg. pseudo-class).N)�__name__�
__module__� __qualname__�__doc__r r r r r # s r c @ sF e Zd Zddd�Zdd� Zdd � Zd
d � Zd d
� Zdd� Zdd� Z dS )� XPathExpr� �*Fc C s || _ || _|| _d S )N)�path�element� condition)�selfr r r Z star_prefixr r r �__init__+ s zXPathExpr.__init__c C s, t | j�t | j� }| jr(|d| j 7 }|S )Nz[%s])�_unicoder r r )r r r r r �__str__0 s zXPathExpr.__str__c C s d| j j| f S )Nz%s[%s])� __class__r )r r r r �__repr__6 s zXPathExpr.__repr__c C s" | j rd| j |f | _ n|| _ | S )Nz %s and (%s))r )r r r r r �
add_condition9 s zXPathExpr.add_conditionc C s. | j dkrd S | �dt�| j � � d| _ d S )Nr z name() = %s)r r" �GenericTranslator�
xpath_literal)r r r r �
add_name_test@ s
zXPathExpr.add_name_testc C s | j d7 _ dS )ze
Append '*/' to the path to keep the context constrained
to a single parent.
z*/N)r )r r r r �add_star_prefixH s zXPathExpr.add_star_prefixc C s: t | �| }|jdkr ||j7 }|| _|j| _|j| _| S )Nz*/)r r r r )r Zcombiner�otherr r r r �joinO s
zXPathExpr.joinN)r r r F)
r r r r r r! r" r% r& r( r r r r r ) s
r z('+)z^[a-zA-Z_][a-zA-Z0-9_.-]*$z^[^ \t\r\n\f]+$c @ s� e Zd ZdZddddd�Zddd d
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dgdd�Zdd� Zedd� �Zd d � Zd d � Zd d!� Zd"d#� Zd$d%� Zd&d'� Zd(d)� Zd*d+� Zd,d-� Zd.d/� Zd0d1� Z d2d3� Z d4d5� Z dhd7d8�Z d9d:� Z d;d<� Z!d=d>� Z"d?d@� Z#dAdB� Z$dCdD� Z%dEdF� Z&dGdH� Z'dIdJ� Z(dKdL� Z)dMdN� Z*dOdP� Z+dQdR� Z,dSdT� Z-e-Z.e-Z/e-Z0e-Z1e-Z2e-Z3e-Z4e-Z5e-Z6dUdV� Z7dWdX� Z8dYdZ� Z9d[d\� Z:d]d^� Z;d_d`� Z<dadb� Z=dcdd� Z>deS )ir# z�
Translator for "generic" XML documents.
Everything is case-sensitive, no assumption is made on the meaning
of element names and attribute names.
Z
descendantZchildZdirect_adjacentZindirect_adjacent)� �>�+�~�existsZequalsZincludesZ dashmatchZ prefixmatchZ suffixmatchZsubstringmatchZ different)r- �=z~=z|=z^=z$=z*=z!=�idzxml:langF�descendant-or-self::c s d� � �fdd�t|�D ��S )u� 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.
z | c 3 s | ]}�j |� d d�V qdS )T)�translate_pseudo_elementsN)�selector_to_xpath)�.0�selector)�prefixr r r � <genexpr>� s z1GenericTranslator.css_to_xpath.<locals>.<genexpr>)r( r )r Zcssr5 r )r5 r r � css_to_xpath� s z GenericTranslator.css_to_xpathc C s` t |dd�}|s td|f ��| �|�}t|| j�s8t�|rP|jrP| �||j�}|pVdt|� S )u4 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.
Z parsed_treeNz"Expected a parsed selector, got %rr ) r
� TypeError�xpath�
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xpathexpr_cls�AssertionError�pseudo_element�xpath_pseudo_elementr )r r4 r5 r1 Ztreer9 r r r r2 � s
z#GenericTranslator.selector_to_xpathc C s t d��dS )z�Translate a pseudo-element.
Defaults to not supporting pseudo-elements at all,
but can be overridden by sub-classes.
z"Pseudo-elements are not supported.N)r )r r9 r= r r r r> � s z&GenericTranslator.xpath_pseudo_elementc C sL t | �} d| krd| } n.d| kr,d| } n dd�dd� t| �D �� } | S ) N�'z'%s'�"z"%s"z
concat(%s)�,c S s$ g | ] }|rd |krdpd| �qS )r? z"%s"z'%s'r )r3 �partr r r �
<listcomp>� s z3GenericTranslator.xpath_literal.<locals>.<listcomp>)r r( �split_at_single_quotes)�sr r r r$ � s
z GenericTranslator.xpath_literalc C s: t |�j}t| d|�� d�}|dkr2td| ��||�S )z%Translate any parsed selector object.zxpath_%sNz%s is not supported.)�typer r
�lowerr )r Zparsed_selectorZ type_name�methodr r r r9 � s
zGenericTranslator.xpathc C s4 | j |j }t| d| �}|| �|j�| �|j��S )z Translate a combined selector.zxpath_%s_combinator)�combinator_mapping�
combinatorr
r9 r4 � subselector)r ZcombinedrJ rH r r r �xpath_combinedselector s z(GenericTranslator.xpath_combinedselectorc C sD | � |j�}| � |j�}|�� |jr6|�d|j �S |�d�S d S )Nznot(%s)�0)r9 r4 rK r% r r" )r Znegationr9 Z sub_xpathr r r �xpath_negation
s z GenericTranslator.xpath_negationc C sB d|j �dd� }t| |d�}|s0td|j ��|| �|j�|�S )z$Translate a functional pseudo-class.zxpath_%s_function�-�_Nz!The pseudo-class :%s() is unknown)r r r r r9 r4 )r �functionrH r r r �xpath_function s z GenericTranslator.xpath_functionc C s@ d|j �dd� }t| |d�}|s0td|j ��|| �|j��S )zTranslate a pseudo-class.zxpath_%s_pseudorO rP Nz The pseudo-class :%s is unknown)�identr r r r9 r4 )r ZpseudorH r r r � xpath_pseudo s z GenericTranslator.xpath_pseudoc C s� | j |j }t| d| �}| jr,|j�� }n|j}t|�}|jr\d|j|f }|oZt|j�}|rjd| }nd| �|� }| j r�|j
�� }n|j
}|| � |j �||�S )z Translate an attribute selector.zxpath_attrib_%sz%s:%s�@zattribute::*[name() = %s])
�attribute_operator_mapping�operatorr
�lower_case_attribute_names�attribrG � is_safe_name� namespacer$ �lower_case_attribute_values�valuer9 r4 )r r4 rW rH r �saferY r] r r r � xpath_attrib' s
z GenericTranslator.xpath_attribc C s | � |j�}| �|d|j�S )zTranslate a class selector.z@class)r9 r4 �xpath_attrib_includes�
class_name)r Zclass_selectorr9 r r r � xpath_class= s z GenericTranslator.xpath_classc C s | � |j�}| �|d|j�S )zTranslate an ID selector.z@id)r9 r4 �xpath_attrib_equalsr/ )r Z id_selectorr9 r r r �
xpath_hashD s z GenericTranslator.xpath_hashc C sh |j }|sd}d}nt|�}| jr*|�� }|jrLd|j|f }|oJt|j�}| j|d�}|sd|�� |S )z'Translate a type or universal selector.r Tz%s:%s)r )r rZ �lower_case_element_namesrG r[ r; r% )r r4 r r^ r9 r r r �
xpath_elementI s z GenericTranslator.xpath_elementc C s |� d|�S )z;right is a child, grand-child or further descendant of leftz/descendant-or-self::*/)r( )r �left�rightr r r �xpath_descendant_combinator` s z-GenericTranslator.xpath_descendant_combinatorc C s |� d|�S )z#right is an immediate child of left�/)r( )r rg rh r r r �xpath_child_combinatord s z(GenericTranslator.xpath_child_combinatorc C s |� d|�}|�� |�d�S )z)right is a sibling immediately after leftz/following-sibling::zposition() = 1)r( r% r" )r rg rh r9 r r r � xpath_direct_adjacent_combinatorh s z2GenericTranslator.xpath_direct_adjacent_combinatorc C s |� d|�S )z1right is a sibling after left, immediately or notz/following-sibling::)r( )r rg rh r r r �"xpath_indirect_adjacent_combinatorn s z4GenericTranslator.xpath_indirect_adjacent_combinatorTc C s yt |j�\}}W n" tk
r4 td|j ��Y nX |rB|�� |�� |dkrl|r^d| }|�d| �S |r|| }| }|dkr�t| �}n
d| }|dkr�d||f g}ng }|dkr�|�d| � n|dk r�|r�|�d | � d
� |�}|�r|�|� |S ) NzInvalid series: '%r'r z last() - %szposition() = %sz+%s� z(position() %s) mod %s = 0zposition() >= %szposition() < (last() %s)z and )
r � arguments�
ValueErrorr r% r& r" �str�appendr( ) r r9 rQ �lastr% �a�bZb_neg�exprr r r �xpath_nth_child_functionu s8
z*GenericTranslator.xpath_nth_child_functionc C s | j ||dd�S )NT)rs )rw )r r9 rQ r r r � xpath_nth_last_child_function� s z/GenericTranslator.xpath_nth_last_child_functionc C s" |j dkrtd��| j||dd�S )Nr z"*:nth-of-type() is not implementedF)r% )r r rw )r r9 rQ r r r �xpath_nth_of_type_function� s
z,GenericTranslator.xpath_nth_of_type_functionc C s$ |j dkrtd��| j||ddd�S )Nr z"*:nth-of-type() is not implementedTF)rs r% )r r rw )r r9 rQ r r r � xpath_nth_last_of_type_function� s
z1GenericTranslator.xpath_nth_last_of_type_functionc C sB |� � dgdgfkr"td|j ��|jd j}|�d| �|� �S )N�STRING�IDENTz9Expected a single string or ident for :contains(), got %rr zcontains(., %s))�argument_typesr ro r] r" r$ )r r9 rQ r] r r r �xpath_contains_function� s
z)GenericTranslator.xpath_contains_functionc C sB |� � dgdgfkr"td|j ��|jd j}|�d| �|� �S )Nr{ r| z5Expected a single string or ident for :lang(), got %rr zlang(%s))r} r ro r] r" r$ )r r9 rQ r] r r r �xpath_lang_function� s
z%GenericTranslator.xpath_lang_functionc C s
|� d�S )Nznot(parent::*))r" )r r9 r r r �xpath_root_pseudo� s z#GenericTranslator.xpath_root_pseudoc C s |� � |�� |�d�S )Nzposition() = 1)r& r% r" )r r9 r r r �xpath_first_child_pseudo� s z*GenericTranslator.xpath_first_child_pseudoc C s |� � |�� |�d�S )Nzposition() = last())r& r% r" )r r9 r r r �xpath_last_child_pseudo� s z)GenericTranslator.xpath_last_child_pseudoc C s$ |j dkrtd��|�� |�d�S )Nr z"*:first-of-type is not implementedzposition() = 1)r r r& r" )r r9 r r r �xpath_first_of_type_pseudo� s
z,GenericTranslator.xpath_first_of_type_pseudoc C s$ |j dkrtd��|�� |�d�S )Nr z!*:last-of-type is not implementedzposition() = last())r r r& r" )r r9 r r r �xpath_last_of_type_pseudo� s
z+GenericTranslator.xpath_last_of_type_pseudoc C s |� � |�� |�d�S )Nz
last() = 1)r% r& r" )r r9 r r r �xpath_only_child_pseudo� s z)GenericTranslator.xpath_only_child_pseudoc C s |j dkrtd��|�d�S )Nr z!*:only-of-type is not implementedz
last() = 1)r r r" )r r9 r r r �xpath_only_of_type_pseudo� s
z+GenericTranslator.xpath_only_of_type_pseudoc C s
|� d�S )Nz not(*) and not(string-length()))r" )r r9 r r r �xpath_empty_pseudo� s z$GenericTranslator.xpath_empty_pseudoc C s
|� d�S )z:Common implementation for pseudo-classes that never match.rM )r" )r r9 r r r �pseudo_never_matches� s z&GenericTranslator.pseudo_never_matchesc C s |rt �|�|� |S )N)r< r" )r r9 r r] r r r �xpath_attrib_exists� s
z%GenericTranslator.xpath_attrib_existsc C s |� d|| �|�f � |S )Nz%s = %s)r" r$ )r r9 r r] r r r rc s z%GenericTranslator.xpath_attrib_equalsc C s< |r |� d||| �|�f � n|� d|| �|�f � |S )Nznot(%s) or %s != %sz%s != %s)r" r$ )r r9 r r] r r r �xpath_attrib_different s z(GenericTranslator.xpath_attrib_differentc C s: t |�r,|�d||| �d| d �f � n
|�d� |S )Nz:%s and contains(concat(' ', normalize-space(%s), ' '), %s)r) rM )�is_non_whitespacer" r$ )r r9 r r] r r r r` s
z'GenericTranslator.xpath_attrib_includesc C s, |� d||| �|�|| �|d �f � |S )Nz'%s and (%s = %s or starts-with(%s, %s))rO )r" r$ )r r9 r r] r r r �xpath_attrib_dashmatch s
z(GenericTranslator.xpath_attrib_dashmatchc C s. |r |� d||| �|�f � n
|� d� |S )Nz%s and starts-with(%s, %s)rM )r" r$ )r r9 r r] r r r �xpath_attrib_prefixmatch# s
z*GenericTranslator.xpath_attrib_prefixmatchc
C s: |r,|� d|||t|�d | �|�f � n
|� d� |S )Nz/%s and substring(%s, string-length(%s)-%s) = %srn rM )r" �lenr$ )r r9 r r] r r r �xpath_attrib_suffixmatch+ s "
z*GenericTranslator.xpath_attrib_suffixmatchc C s. |r |� d||| �|�f � n
|� d� |S )Nz%s and contains(%s, %s)rM )r" r$ )r r9 r r] r r r �xpath_attrib_substringmatch5 s
z-GenericTranslator.xpath_attrib_substringmatchN)r0 )r0 F)FT)?r r r r rI rV Z id_attribute�lang_attributere rX r\ r r; r7 r2 r> � staticmethodr$ r9 rL rN rR rT r_ rb rd rf ri rk rl rm rw rx ry rz r~ r r� r� r� r� r� r� r� r� r� �xpath_link_pseudoZxpath_visited_pseudoZxpath_hover_pseudoZxpath_active_pseudoZxpath_focus_pseudoZxpath_target_pseudo�xpath_enabled_pseudo�xpath_disabled_pseudo�xpath_checked_pseudor� rc r� r` r� r� r� r� r r r r r# g s�
(
r# c @ sF e Zd ZdZdZddd�Zdd� Zdd � Zd
d � Zd d
� Z dd� Z
dS )�HTMLTranslatora�
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.
ZlangFc C s || _ |sd| _d| _d S )NT)�xhtmlre rX )r r� r r r r R s zHTMLTranslator.__init__c C s
|� d�S )Nz�(@selected and name(.) = 'option') or (@checked and (name(.) = 'input' or name(.) = 'command')and (@type = 'checkbox' or @type = 'radio')))r" )r r9 r r r r� Y s z#HTMLTranslator.xpath_checked_pseudoc C sP |� � dgdgfkr"td|j ��|jd j}|�d| j| �|�� d �f �S )Nr{ r| z5Expected a single string or ident for :lang(), got %rr z�ancestor-or-self::*[@lang][1][starts-with(concat(translate(@%s, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), '-'), %s)]rO )r} r ro r] r" r� r$ rG )r r9 rQ r] r r r r a s
z"HTMLTranslator.xpath_lang_functionc C s
|� d�S )NzA@href and (name(.) = 'a' or name(.) = 'link' or name(.) = 'area'))r" )r r9 r r r r� o s z HTMLTranslator.xpath_link_pseudoc C s
|� d�S )Na�
(
@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 r9 r r r r� v s z$HTMLTranslator.xpath_disabled_pseudoc C s
|� d�S )Na'
(
@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 r9 r r r r� � s z#HTMLTranslator.xpath_enabled_pseudoN)F) r r r r r� r r� r r� r� r� r r r r r� ? s
r� )N)r �sys�reZcssselect.parserr r r � version_infoZ
basestringZ _basestringZunicoder rq r � RuntimeErrorr �objectr �compile�splitrD �matchrZ r� r# r� r r r r �<module>
s&
1 [