o
    ;/b$                     @   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   */usr/lib/python3/dist-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   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      d S r   r   )r!   Zlocatorr   r   r   setDocumentLocator8      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   startPrefixMappingA   s   

z,ElementTreeContentHandler.startPrefixMappingc                 C   s,   | j | }|  |d u r|d | _d S d S N)r   popr   )r!   r,   Zns_uri_listr   r   r   endPrefixMappingJ   s
   
z*ElementTreeContentHandler.endPrefixMappingc                 C   s8   |\}}|rd| }|S | j rd| j |f }|S |}|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   |  |}|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   r3   r   addpreviousr0   )r7   Z	iteritemsAttributeErroritemsr   r   r    r   r   hasattrr8   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   s8   






z(ElementTreeContentHandler.startElementNSc                 C   s8   t ||}| jd u r| j| d S | 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   r1   r7   r   r	   )r!   r=   r>   rA   r6   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>)dictr:   rC   )r!   namer?   r   r   r   startElement   s
   z&ElementTreeContentHandler.startElementc                 C   s   |  d |f| d S r   )rG   )r!   rM   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 )Nr0    )r   tail
IndexErrortext)r!   rE   Zlast_elementr   r   r   
characters   s   
z$ElementTreeContentHandler.charactersr   )r
   r   r   r   r   r#   propertyr   r&   r(   r)   r.   r2   r7   rC   rF   rG   rN   rO   rT   ZignorableWhitespacer   r   r   r   r   #   s$    
	

!

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   sR   z|  }W n ty   |}Y nw || _|| _ddlm} || _|i i | _d S )Nr   )AttributesNSImpl)Zgetrootr9   _element_content_handlerZxml.sax.xmlreaderrW   _attr_class_empty_attributes)r!   element_or_treecontent_handlerrA   Z
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   r0   getnext)rY   r(   rX   r;   r^   getattrr   r*   _recursive_saxifyr_   r)   )r!   rA   ZsiblingsrB   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$|| d S |j	}g }||krF|
 D ]\}}	|||	krE|||	f q3|
 }
|
rvi }i }|
D ]\}}t|}|||< | j|d |d |d dd||< qR| ||}n| j}t|\}	}| j|	|||jdd}|D ]
\}}||| q||	|f|| |j}|r|| |D ]}| || q||	|f| |D ]	\}}|| q|j}|r|| d S d S )Nr   r   T)preferred_prefixis_attributeF)rd   )rY   r   r   r   rF   rD   rS   rQ   rT   nsmapr:   getr*   r   _build_qnamerZ   r[   r,   r.   rC   ra   rG   r2   )r!   rA   Zparent_nsmapr]   r   rQ   Zelement_nsmapZnew_prefixesr,   r4   ZattribsZattr_valuesZattr_qnamesZattr_ns_namer@   Zattr_ns_tupleZsax_attributesr5   r>   r-   rS   childr   r   r   ra      sh   


z%ElementTreeProducer._recursive_saxifyc                    sv    d u r|S |s| | kr|}n fdd| D }t|dkr'|d n|r-t|nd }|d u r5|S |d | S )Nc                    s$   g | ]\}}|d ur| kr|qS r   r   )rH   Zpfxr-   r4   r   r   rK     s    z4ElementTreeProducer._build_qname.<locals>.<listcomp>r   r   :)rf   r:   lenmin)r!   r4   r5   re   rc   rd   r,   Z
candidatesr   ri   r   rg      s   
z ElementTreeProducer._build_qnameN)r
   r   r   r   r   rb   ra   rg   r   r   r   r   rV      s    6rV   c                 C   s   t | | S )zlOne-shot helper to generate SAX events from an XML tree and fire
    them against a SAX ContentHandler.
    )rV   rb   )r\   r]   r   r   r   rb     s   rb   N)r   Z
__future__r   Zxml.sax.handlerr   Zlxmlr   Z
lxml.etreer   r   r   r   Z	LxmlErrorr	   r   r   objectrV   rb   r   r   r   r   <module>   s   |s