U
    cc$                     @   s   d Z ddlm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e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
    )absolute_import)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   'lib/python3.8/site-packages/lxml/sax.pyr	      s   r	   c                 C   s0   | d dkr$t | dd  ddS d | fS d S )Nr   {   })tuplesplit)tagr   r   r   	_getNsTag   s    r   c                   @   s   e Zd ZdZd ddZdd ZeeejdZdd	 Zd
d Z	dd Z
dd Zdd Zdd Zd!ddZdd Zdd Zd"ddZdd Zdd ZeZdS )#ElementTreeContentHandlerz/Build an lxml ElementTree from SAX events.
    Nc                 C   sL   t |  d | _g | _g | _d | _d d gi| _i | _|d krBtj	}|| _
d S N)r   __init___root_root_siblings_element_stack_default_ns_ns_mapping_new_mappingsr   ZElement_makeelement)selfZmakeelementr   r   r   r   &   s    
z"ElementTreeContentHandler.__init__c                 C   s
   t | jS )z=Contains the generated ElementTree after parsing is finished.)r   r   r!   r   r   r   
_get_etree2   s    z$ElementTreeContentHandler._get_etree)docc                 C   s   d S r   r   )r!   Zlocatorr   r   r   setDocumentLocator8   s    z,ElementTreeContentHandler.setDocumentLocatorc                 C   s   d S r   r   r"   r   r   r   startDocument;   s    z'ElementTreeContentHandler.startDocumentc                 C   s   d S r   r   r"   r   r   r   endDocument>   s    z%ElementTreeContentHandler.endDocumentc                 C   sR   || j |< z| j| | W n  tk
r>   |g| j|< Y nX |d krN|| _d S r   )r   r   appendKeyErrorr   )r!   prefixurir   r   r   startPrefixMappingA   s    
z,ElementTreeContentHandler.startPrefixMappingc                 C   s(   | j | }|  |d kr$|d | _d S N)r   popr   )r!   r*   Zns_uri_listr   r   r   endPrefixMappingJ   s    
z*ElementTreeContentHandler.endPrefixMappingc                 C   s4   |\}}|rd| }n| j r,d| j |f }n|}|S )N{%s}%s)r   )r!   Zns_name_tuplens_uri
local_nameel_tagr   r   r   	_buildTagP   s    
z#ElementTreeContentHandler._buildTagc                 C   s   |  |}|rni }z| }W n tk
r:   | }Y nX |D ]*\}}|d rZd| }	n|d }	|||	< q@nd }| j}
| jd kr| ||| j }| _| jrt	|dr| jD ]}|
| q| jd d = nt|
d ||| j}|
| | j  d S )Nr   r1   r   addpreviousr.   )r5   Z	iteritemsAttributeErroritemsr   r   r    r   r   hasattrr6   r   r(   clear)r!   ns_nameqname
attributesZel_nameZattrsZiter_attributesZ
name_tuplevalueZ	attr_nameZelement_stackelementsiblingr   r   r   startElementNSZ   s6    




 
z(ElementTreeContentHandler.startElementNSc                 C   s6   t ||}| jd kr"| j| n| jd | d S r-   )r   r   r   r(   r   )r!   targetdataZpir   r   r   processingInstruction{   s    

z/ElementTreeContentHandler.processingInstructionc                 C   s.   | j  }| |}||jkr*td| d S )NzUnexpected element closed: )r   r/   r5   r   r	   )r!   r;   r<   r?   r4   r   r   r   endElementNS   s    


z&ElementTreeContentHandler.endElementNSc                 C   s0   |rt dd | D }| d |f|| d S )Nc                 S   s   g | ]\}}d |f|fqS r   r   ).0kvr   r   r   
<listcomp>   s     z:ElementTreeContentHandler.startElement.<locals>.<listcomp>)dictr8   rA   )r!   namer=   r   r   r   startElement   s
    z&ElementTreeContentHandler.startElementc                 C   s   |  d |f| d S r   )rE   )r!   rK   r   r   r   
endElement   s    z$ElementTreeContentHandler.endElementc                 C   sP   | j d }z|d }|jpd| |_W n$ tk
rJ   |jp>d| |_Y nX d S )Nr.    )r   tail
IndexErrortext)r!   rC   Zlast_elementr   r   r   
characters   s    
z$ElementTreeContentHandler.characters)N)N)N)r
   r   r   r   r   r#   propertyr   r%   r&   r'   r,   r0   r5   rA   rD   rE   rL   rM   rR   Z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   z|  }W n tk
r$   |}Y nX || _|| _ddlm} || _|i i | _d S )Nr   )AttributesNSImpl)Zgetrootr7   _element_content_handlerZxml.sax.xmlreaderrU   _attr_class_empty_attributes)r!   element_or_treecontent_handlerr?   Z
attr_classr   r   r   r      s    
zElementTreeProducer.__init__c                 C   s   | j   | j}t|drjg }| }t|dd tkrJ|| | }q&|d d d D ]}| |i  qX| |i  t|dr|	 }t|dd tkr| |i  |	 }q| j 
  d S )Ngetpreviousr   r.   getnext)rW   r&   rV   r9   r\   getattrr   r(   _recursive_saxifyr]   r'   )r!   r?   Zsiblingsr@   r   r   r   saxify   s"    





zElementTreeProducer.saxifyc                 C   s  | j }|j}|tks|tkrL|tkr4||j|j |j}|rH|| d S |j	}g }||kr|
 D ]$\}}	|||	krf|||	f qf|
 }
|
ri }i }|
D ]8\}}t|}|||< | j|d |d |d dd||< q| ||}n| j}t|\}	}| j|	|||jdd}|D ]\}}||| q||	|f|| |j}|rX|| |D ]}| || q\||	|f| |D ]\}}|| q|j}|r|| d S )Nr   r   T)preferred_prefixis_attributeF)rb   )rW   r   r   r   rD   rB   rQ   rO   rR   nsmapr8   getr(   r   _build_qnamerX   rY   r*   r,   rA   r_   rE   r0   )r!   r?   Zparent_nsmapr[   r   rO   Zelement_nsmapZnew_prefixesr*   r2   ZattribsZattr_valuesZattr_qnamesZattr_ns_namer>   Zattr_ns_tupleZsax_attributesr3   r<   r+   rQ   Zchildr   r   r   r_      sx     
         
z%ElementTreeProducer._recursive_saxifyc                    sv    d kr|S |s$| | kr$|}n: fdd| D }t|dkrN|d n|rZt|nd }|d krj|S |d | S )Nc                    s$   g | ]\}}|d k	r| kr|qS r   r   )rF   Zpfxr+   r2   r   r   rI     s    z4ElementTreeProducer._build_qname.<locals>.<listcomp>r   r   :)rd   r8   lenmin)r!   r2   r3   rc   ra   rb   r*   Z
candidatesr   rf   r   re      s    
z ElementTreeProducer._build_qnameN)r
   r   r   r   r   r`   r_   re   r   r   r   r   rT      s
   6rT   c                 C   s   t | | S )zlOne-shot helper to generate SAX events from an XML tree and fire
    them against a SAX ContentHandler.
    )rT   r`   )rZ   r[   r   r   r   r`     s    r`   N)r   Z
__future__r   Zxml.sax.handlerr   Zlxmlr   Z
lxml.etreer   r   r   r   Z	LxmlErrorr	   r   r   objectrT   r`   r   r   r   r   <module>   s   |s