3
(hW$                 @   s   d Z ddlmZ ddlmZ ddlmZmZ ddlmZm	Z	 G dd dej
Zdd	 ZG d
d deZG dd dZdd ZdS )a?  
SAX-based adapter to copy trees from/to the Python standard library.

Use the `ElementTreeContentHandler` class to build an ElementTree from
SAX events.

Use the `ElementTreeProducer` class or the `saxify()` function to fire
the SAX events of an ElementTree against a SAX ContentHandler.

See https://lxml.de/sax.html
    )ContentHandler)etree)ElementTree
SubElement)CommentProcessingInstructionc               @   s   e Zd ZdZdS )SaxErrorzGeneral SAX error.
    N)__name__
__module____qualname____doc__ r   r   */tmp/pip-install-q3hcpn_q/lxml/lxml/sax.pyr      s   r   c             C   s0   | d dkr$t | dd  jddS d | fS d S )Nr   {   })tuplesplit)tagr   r   r   	_getNsTag   s    r   c               @   s   e Zd ZdZd ddZdd ZeeejdZdd	 Zd
d Z	dd Z
dd Zdd Zdd Zd!ddZdd Zdd Zd"ddZdd Zdd ZeZdS )#ElementTreeContentHandlerz/Build an lxml ElementTree from SAX events.
    Nc             C   sL   t j|  d | _g | _g | _d | _d d gi| _i | _|d krBtj	}|| _
d S )N)r   __init___root_root_siblings_element_stack_default_ns_ns_mapping_new_mappingsr   Element_makeelement)selfmakeelementr   r   r   r   %   s    
z"ElementTreeContentHandler.__init__c             C   s
   t | jS )z=Contains the generated ElementTree after parsing is finished.)r   r   )r    r   r   r   
_get_etree1   s    z$ElementTreeContentHandler._get_etree)docc             C   s   d S )Nr   )r    locatorr   r   r   setDocumentLocator7   s    z,ElementTreeContentHandler.setDocumentLocatorc             C   s   d S )Nr   )r    r   r   r   startDocument:   s    z'ElementTreeContentHandler.startDocumentc             C   s   d S )Nr   )r    r   r   r   endDocument=   s    z%ElementTreeContentHandler.endDocumentc             C   sR   || j |< y| j| j| W n  tk
r>   |g| j|< Y nX |d krN|| _d S )N)r   r   appendKeyErrorr   )r    prefixurir   r   r   startPrefixMapping@   s    
z,ElementTreeContentHandler.startPrefixMappingc             C   s(   | j | }|j  |d kr$|d | _d S )Nr   )r   popr   )r    r*   Zns_uri_listr   r   r   endPrefixMappingI   s    
z*ElementTreeContentHandler.endPrefixMappingc             C   s4   |\}}|rd| }n| j r,d| j |f }n|}|S )Nz{%s}%s)r   )r    Zns_name_tuplens_uri
local_nameel_tagr   r   r   	_buildTagO   s    
z#ElementTreeContentHandler._buildTagc             C   s   | j |}|rri }y|j }W n tk
r:   |j }Y nX x8|D ]*\}}|d r\d| }	n|d }	|||	< qBW nd }| j}
| jd kr| j||| j }| _| jrt	|drx| jD ]}|j
| qW | jd d = nt|
d ||| j}|
j| | jj  d S )Nr   z{%s}%sr   addpreviousr-   )r3   	iteritemsAttributeErroritemsr   r   r   r   r   hasattrr4   r   r(   clear)r    ns_nameqname
attributesZel_nameattrsZiter_attributesZ
name_tuplevalue	attr_nameZelement_stackelementsiblingr   r   r   startElementNSY   s0    





z(ElementTreeContentHandler.startElementNSc             C   s6   t ||}| jd kr"| jj| n| jd j| d S )Nr   r-   )r   r   r   r(   r   )r    targetdatapir   r   r   processingInstructionz   s    

z/ElementTreeContentHandler.processingInstructionc             C   s.   | j j }| j|}||jkr*td| d S )NzUnexpected element closed: )r   r.   r3   r   r   )r    r:   r;   r@   r2   r   r   r   endElementNS   s    


z&ElementTreeContentHandler.endElementNSc             C   s,   |rdd |j  D }| jd |f|| d S )Nc             S   s   i | ]\}}|d |fqS )Nr   ).0kvr   r   r   
<dictcomp>   s    z:ElementTreeContentHandler.startElement.<locals>.<dictcomp>)r7   rB   )r    namer<   r   r   r   startElement   s    z&ElementTreeContentHandler.startElementc             C   s   | j d |f| d S )N)rG   )r    rL   r   r   r   
endElement   s    z$ElementTreeContentHandler.endElementc             C   sP   | j d }y|d }|jpd| |_W n$ tk
rJ   |jp>d| |_Y nX d S )Nr    r-   r-   )r   tail
IndexErrortext)r    rD   Zlast_elementr   r   r   
characters   s    
z$ElementTreeContentHandler.characters)N)N)N)r	   r
   r   r   r   r"   propertyr   r%   r&   r'   r,   r/   r3   rB   rF   rG   rM   rN   rS   ignorableWhitespacer   r   r   r   r   "   s"   
	

!

r   c               @   s0   e Zd ZdZdd Zdd Zdd Zdd	 Zd
S )ElementTreeProducerz5Produces SAX events for an element and children.
    c             C   sT   y|j  }W n tk
r$   |}Y nX || _|| _ddlm} || _|i i | _d S )Nr   )AttributesNSImpl)getrootr6   _element_content_handlerZxml.sax.xmlreaderrW   _attr_class_empty_attributes)r    element_or_treecontent_handlerr@   Z
attr_classr   r   r   r      s    
zElementTreeProducer.__init__c             C   s   | j j  | j}t|drrg }|j }x&t|dd tkrL|j| |j }q(W x"|d d d D ]}| j|i  q^W | j|i  t|dr|j	 }x(t|dd tkr| j|i  |j	 }qW | j j
  d S )Ngetpreviousr   r   getnextr-   )rZ   r&   rY   r8   r_   getattrr   r(   _recursive_saxifyr`   r'   )r    r@   ZsiblingsrA   r   r   r   saxify   s"    



zElementTreeProducer.saxifyc             C   s  | j }|j}|tks|tkrL|tkr4|j|j|j |j}|rH|j| d S |j	}g }||krx0|j
 D ]$\}}	|j||	krh|j||	f qhW |j
 }
|
ri }i }x@|
D ]8\}}t|}|||< | j|d |d |d dd||< qW | j||}n| j}t|\}	}| j|	|||jdd}x|D ]\}}|j|| q"W |j|	|f|| |j}|rd|j| x|D ]}| j|| qjW |j|	|f| x|D ]\}}|j| qW |j}|r|j| d S )Nr   r   T)preferred_prefixis_attributeF)re   )rZ   r   r   r   rF   rC   rR   rP   rS   nsmapr7   getr(   r   _build_qnamer[   r\   r*   r,   rB   rb   rG   r/   )r    r@   Zparent_nsmapr^   r   rP   Zelement_nsmapZnew_prefixesr*   r0   ZattribsZattr_valuesZattr_qnamesZattr_ns_namer>   Zattr_ns_tupleZsax_attributesr1   r;   r+   rR   childr   r   r   rb      s\    


z%ElementTreeProducer._recursive_saxifyc                sx    d kr|S | r&|j | kr&|}n: fdd|j D }t|dkrP|d n|r\t|nd }|d krl|S |d | S )Nc                s$   g | ]\}}|d k	r| kr|qS )Nr   )rH   pfxr+   )r0   r   r   
<listcomp>   s    z4ElementTreeProducer._build_qname.<locals>.<listcomp>r   r   :)rg   r7   lenmin)r    r0   r1   rf   rd   re   r*   
candidatesr   )r0   r   rh      s    z ElementTreeProducer._build_qnameN)r	   r
   r   r   r   rc   rb   rh   r   r   r   r   rV      s
   6rV   c             C   s   t | |j S )zlOne-shot helper to generate SAX events from an XML tree and fire
    them against a SAX ContentHandler.
    )rV   rc   )r]   r^   r   r   r   rc     s    rc   N)r   Zxml.sax.handlerr   lxmlr   Z
lxml.etreer   r   r   r   Z	LxmlErrorr   r   r   rV   rc   r   r   r   r   <module>   s   zs