U
    :g                     @   s   d Z ddlmZ zddlZW n ek
r8   edY nX ejZejZejZdddd	gZ	G d
d dej
ZG dd deejZdd ZedZde_eed< G dd	 d	ejZdS )zCSS Selectors based on XPath.

This module supports selecting XML/HTML tags based on CSS selectors.
See the `CSSSelector` class for details.

This is a thin wrapper around cssselect 0.7 or later.
   )etree    NzPcssselect does not seem to be installed. See https://pypi.org/project/cssselect/SelectorSyntaxErrorExpressionErrorSelectorErrorCSSSelectorc                   @   s   e Zd ZdZdd ZdS )LxmlTranslatorzR
    A custom CSS selector to XPath translator with lxml-specific extensions.
    c                 C   sF   |  dgdgfkr"td|j |jd j}|d| |  S )NSTRINGZIDENTz9Expected a single string or ident for :contains(), got %rr   z7contains(__lxml_internal_css:lower-case(string(.)), %s))Zargument_typesr   	argumentsvalueZadd_conditionZxpath_literallower)selfZxpathfunctionr    r   2/tmp/pip-unpacked-wheel-m1sofc2u/lxml/cssselect.pyxpath_contains_function    s    z&LxmlTranslator.xpath_contains_functionN)__name__
__module____qualname____doc__r   r   r   r   r   r      s   r   c                   @   s   e Zd ZdZdS )LxmlHTMLTranslatorz)
    lxml extensions + HTML support.
    N)r   r   r   r   r   r   r   r   r   -   s   r   c                 C   s   |  S )N)r   )contextsr   r   r   _make_lower_case3   s    r   zhttp://codespeak.net/lxml/css/Z__lxml_internal_cssz
lower-casec                       s*   e Zd ZdZd fdd	Zdd Z  ZS )	r   a  A CSS selector.

    Usage::

        >>> from lxml import etree, cssselect
        >>> select = cssselect.CSSSelector("a tag > child")

        >>> root = etree.XML("<a><b><c/><tag><child>TEXT</child></tag></b></a>")
        >>> [ el.tag for el in select(root) ]
        ['child']

    To use CSS namespaces, you need to pass a prefix-to-namespace
    mapping as ``namespaces`` keyword argument::

        >>> rdfns = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'
        >>> select_ns = cssselect.CSSSelector('root > rdf|Description',
        ...                                   namespaces={'rdf': rdfns})

        >>> rdf = etree.XML((
        ...     '<root xmlns:rdf="%s">'
        ...       '<rdf:Description>blah</rdf:Description>'
        ...     '</root>') % rdfns)
        >>> [(el.tag, el.text) for el in select_ns(rdf)]
        [('{http://www.w3.org/1999/02/22-rdf-syntax-ns#}Description', 'blah')]

    Nxmlc                    sV   |dkrt  }n"|dkr t }n|dkr2tdd}||}t j||d || _d S )Nr   htmlxhtmlT)r   )
namespaces)r   r   Zcss_to_xpathsuper__init__css)r   r    r   Z
translatorpath	__class__r   r   r   V   s    

zCSSSelector.__init__c                 C   s   d| j jtt| | jf S )Nz<%s %x for %r>)r#   r   absidr    )r   r   r   r   __repr__a   s
    
zCSSSelector.__repr__)Nr   )r   r   r   r   r   r&   __classcell__r   r   r"   r   r   ;   s   )r    r   Z	cssselectZexternal_cssselectImportErrorr   r   r   __all__ZGenericTranslatorr   ZHTMLTranslatorr   r   ZFunctionNamespacensprefixZXPathr   r   r   r   r   <module>   s(   	

