o
    gW$                     @   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   A/home/ubuntu/webapp/venv/lib/python3.10/site-packages/lxml/sax.pyr      s    r   c                 C   s,   | d dkrt | dd  ddS d | f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 u r!t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      d S r   r   )r!   locatorr   r   r   setDocumentLocator7      z,ElementTreeContentHandler.setDocumentLocatorc                 C   r&   r   r   r#   r   r   r   startDocument:   r)   z'ElementTreeContentHandler.startDocumentc                 C   r&   r   r   r#   r   r   r   endDocument=   r)   z%ElementTreeContentHandler.endDocumentc                 C   sT   || j |< z
| j| | W n ty   |g| j|< Y nw |d u r(|| _d S d S r   )r   r   appendKeyErrorr   )r!   prefixurir   r   r   startPrefixMapping@   s   

z,ElementTreeContentHandler.startPrefixMappingc                 C   s,   | j | }|  |d u r|d | _d S d S N)r   popr   )r!   r.   ns_uri_listr   r   r   endPrefixMappingI   s
   
z*ElementTreeContentHandler.endPrefixMappingc                 C   s8   |\}}|rd| }|S | j rd| j |f }|S |}|S )N{%s}%s)r   )r!   ns_name_tuplens_uri
local_nameel_tagr   r   r   	_buildTagO   s   z#ElementTreeContentHandler._buildTagc                 C   s   |  |}|r6i }z| }W n ty   | }Y nw |D ]\}}|d r,d| }	n|d }	|||	< qnd }| j}
| jd u re| ||| j }| _| jr^t	|dr^| jD ]}|
| qV| jd d = n
t|
d ||| j}|
| | j  d S )Nr   r6   r   addpreviousr2   )r;   	iteritemsAttributeErroritemsr   r   r    r   r   hasattrr<   r   r,   clear)r!   ns_nameqname
attributesel_nameattrsiter_attributes
name_tuplevalue	attr_nameelement_stackelementsiblingr   r   r   startElementNSY   s8   






z(ElementTreeContentHandler.startElementNSc                 C   s8   t ||}| jd u r| j| d S | jd | d S r1   )r   r   r   r,   r   )r!   targetdatapir   r   r   processingInstructionz   s   

z/ElementTreeContentHandler.processingInstructionc                 C   s.   | j  }| |}||jkrtd| d S )NzUnexpected element closed: )r   r3   r;   r   r   )r!   rB   rC   rL   r:   r   r   r   endElementNS   s
   


z&ElementTreeContentHandler.endElementNSc                 C   s,   |rdd |  D }| d |f|| d S )Nc                 S   s   i | ]	\}}d |f|qS r   r   ).0kvr   r   r   
<dictcomp>   s    z:ElementTreeContentHandler.startElement.<locals>.<dictcomp>)r?   rN   )r!   namerD   r   r   r   startElement   s   z&ElementTreeContentHandler.startElementc                 C   s   |  d |f| d S r   )rS   )r!   rX   r   r   r   
endElement   s   z$ElementTreeContentHandler.endElementc                 C   sN   | j d }z|d }|jpd| |_W d S  ty&   |jpd| |_Y d S w )Nr2    )r   tail
IndexErrortext)r!   rP   last_elementr   r   r   
characters   s   
z$ElementTreeContentHandler.charactersr   )r	   r
   r   r   r   r$   propertyr   r(   r*   r+   r0   r5   r;   rN   rR   rS   rY   rZ   r`   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   sR   z|  }W n ty   |}Y nw || _|| _ddlm} || _|i i | _d S )Nr   )AttributesNSImpl)getrootr>   _element_content_handlerxml.sax.xmlreaderrd   _attr_class_empty_attributes)r!   element_or_treecontent_handlerrL   
attr_classr   r   r   r      s   zElementTreeProducer.__init__c                 C   s   | j   | j}t|dr<g }| }t|dd tu r,|| | }t|dd tu s|d d d D ]}| |i  q3| |i  t|dre|	 }t|dd tu re| |i  |	 }t|dd tu sS| j 
  d S )Ngetpreviousr   r2   getnext)rg   r*   rf   r@   rn   getattrr   r,   _recursive_saxifyro   r+   )r!   rL   siblingsrM   r   r   r   saxify   s&   



zElementTreeProducer.saxifyc                 C   s  | j }|j}|tu s|tu r&|tu r||j|j |j}|r$|| d S |j	}g }||krF|
 D ]\}}	|||	krE|||	f q3|
 }
|
rvi }i }|
D ]\}}t|}|||< | j|d |d |d dd||< qR| ||}n| j}t|\}	}| j|	|||jdd}|D ]
\}}||| q||	|f|| |j}|r|| |D ]}| || q||	|f| |D ]	\}}|| q|j}|r|| d S d S )Nr   r   T)preferred_prefixis_attributeF)ru   )rg   r   r   r   rR   rO   r^   r\   r`   nsmapr?   getr,   r   _build_qnameri   rj   r.   r0   rN   rq   rS   r5   )r!   rL   parent_nsmaprl   r   r\   element_nsmapnew_prefixesr.   r8   attribsattr_valuesattr_qnamesattr_ns_namerI   attr_ns_tuplesax_attributesr9   rC   r/   r^   childr   r   r   rq      sh   


z%ElementTreeProducer._recursive_saxifyc                    sv    d u r|S |s| | kr|}n fdd| D }t|dkr'|d n|r-t|nd }|d u r5|S |d | S )Nc                    s$   g | ]\}}|d ur| kr|qS r   r   )rT   pfxr/   r8   r   r   
<listcomp>   s
    z4ElementTreeProducer._build_qname.<locals>.<listcomp>r   r   :)rw   r?   lenmin)r!   r8   r9   rv   rt   ru   r.   
candidatesr   r   r   rx      s   
z ElementTreeProducer._build_qnameN)r	   r
   r   r   r   rs   rq   rx   r   r   r   r   rc      s    6rc   c                 C   s   t | | S )zlOne-shot helper to generate SAX events from an XML tree and fire
    them against a SAX ContentHandler.
    )rc   rs   )rk   rl   r   r   r   rs     s   rs   N)r   xml.sax.handlerr   lxmlr   
lxml.etreer   r   r   r   	LxmlErrorr   r   r   rc   rs   r   r   r   r   <module>   s   zs