U
    €Haì"  ã                   @   sˆ   d dl mZ d dlmZ dZG dd„ deƒZG dd„ deƒZG dd	„ d	ƒZG d
d„ deƒZ	G dd„ deƒZ
G dd„ de	ƒZddd„ZdS )é    )Úcontextmanager)Úcopy)z'django.template.context_processors.csrfc                   @   s   e Zd ZdZdS )ÚContextPopExceptionz,pop() has been called more times than push()N)Ú__name__Ú
__module__Ú__qualname__Ú__doc__© r	   r	   ú;/tmp/pip-unpacked-wheel-3jxiddxt/django/template/context.pyr      s   r   c                       s,   e Zd Z‡ fdd„Zdd„ Zdd„ Z‡  ZS )ÚContextDictc                    s$   t ƒ j||Ž |j | ¡ || _d S ©N)ÚsuperÚ__init__ÚdictsÚappendÚcontext)Úselfr   ÚargsÚkwargs©Ú	__class__r	   r
   r      s    zContextDict.__init__c                 C   s   | S r   r	   ©r   r	   r	   r
   Ú	__enter__   s    zContextDict.__enter__c                 O   s   | j  ¡  d S r   )r   Úpop)r   r   r   r	   r	   r
   Ú__exit__   s    zContextDict.__exit__)r   r   r   r   r   r   Ú__classcell__r	   r	   r   r
   r      s   r   c                       s¦   e Zd Zd$dd„Zd%dd„Z‡ fdd„Zdd	„ Zd
d„ Zd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d„Zd(dd„Zd d!„ Zd"d#„ Z‡  ZS ))ÚBaseContextNc                 C   s   |   |¡ d S r   )Ú_reset_dicts)r   Údict_r	   r	   r
   r      s    zBaseContext.__init__c                 C   s,   ddd dœ}|g| _ |d k	r(| j  |¡ d S )NTF)ÚTrueÚFalseÚNone)r   r   )r   ÚvalueÚbuiltinsr	   r	   r
   r      s    zBaseContext._reset_dictsc                    s   t tƒ ƒ}| jd d … |_|S r   )r   r   r   ©r   Z	duplicater   r	   r
   Ú__copy__%   s    
zBaseContext.__copy__c                 C   s
   t | jƒS r   )Úreprr   r   r	   r	   r
   Ú__repr__*   s    zBaseContext.__repr__c                 C   s
   t | jƒS r   ©Úreversedr   r   r	   r	   r
   Ú__iter__-   s    zBaseContext.__iter__c                 O   sF   g }|D ],}t |tƒr*||jdd … 7 }q| |¡ qt| f|ž|ŽS ©Né   )Ú
isinstancer   r   r   r   )r   r   r   r   Údr	   r	   r
   Úpush0   s    
zBaseContext.pushc                 C   s   t | jƒdkrt‚| j ¡ S r+   )Úlenr   r   r   r   r	   r	   r
   r   9   s    zBaseContext.popc                 C   s   || j d |< dS )z%Set a variable in the current contextéÿÿÿÿN©r   )r   Úkeyr"   r	   r	   r
   Ú__setitem__>   s    zBaseContext.__setitem__c                 C   s6   | j d }t| j ƒD ]}||kr|} q*q|||< dS )z|
        Set a variable in one of the higher contexts if it exists there,
        otherwise in the current context.
        r1   N)r   r)   )r   r3   r"   r   r.   r	   r	   r
   Ú
set_upwardB   s    
zBaseContext.set_upwardc                 C   s0   t | jƒD ]}||kr
||   S q
t|ƒ‚dS )zHGet a variable's value, starting at the current context and going upwardN)r)   r   ÚKeyError)r   r3   r.   r	   r	   r
   Ú__getitem__N   s    zBaseContext.__getitem__c                 C   s   | j d |= dS )z*Delete a variable from the current contextr1   Nr2   ©r   r3   r	   r	   r
   Ú__delitem__U   s    zBaseContext.__delitem__c                    s   t ‡ fdd„| jD ƒƒS )Nc                 3   s   | ]}ˆ |kV  qd S r   r	   )Ú.0r.   ©r3   r	   r
   Ú	<genexpr>Z   s     z+BaseContext.__contains__.<locals>.<genexpr>)Úanyr   r8   r	   r;   r
   Ú__contains__Y   s    zBaseContext.__contains__c                 C   s(   t | jƒD ]}||kr
||   S q
|S r   r(   )r   r3   Ú	otherwiser.   r	   r	   r
   Úget\   s    zBaseContext.getc                 C   s,   z
| | W S  t k
r&   || |< Y nX |S r   )r6   )r   r3   Údefaultr	   r	   r
   Ú
setdefaultb   s
    
zBaseContext.setdefaultc                 C   s   t | ƒ}| |¡ |S )z{
        Return a new context with the same properties, but with only the
        values given in 'values' stored.
        )r   r   ©r   ÚvaluesZnew_contextr	   r	   r
   Únewi   s    
zBaseContext.newc                 C   s   i }| j D ]}| |¡ q
|S )z6
        Return self.dicts as one dictionary.
        )r   Úupdate)r   Zflatr.   r	   r	   r
   Úflattenr   s    
zBaseContext.flattenc                 C   s   t |tƒstS |  ¡ | ¡ kS )zN
        Compare two contexts by comparing theirs 'dicts' attributes.
        )r-   r   ÚNotImplementedrG   )r   Úotherr	   r	   r
   Ú__eq__{   s    
zBaseContext.__eq__)N)N)N)N)N)r   r   r   r   r   r%   r'   r*   r/   r   r4   r5   r7   r9   r>   r@   rB   rE   rG   rJ   r   r	   r	   r   r
   r      s"   

	


		r   c                       sB   e Zd ZdZd‡ fdd„	Zedd„ ƒZ‡ fdd	„Zd
d„ Z‡  Z	S )ÚContextz&A stack container for variable contextNTc                    s6   || _ || _|| _d| _tƒ | _d | _tƒ  |¡ d S )NÚunknown)	Ú
autoescapeÚuse_l10nÚuse_tzZtemplate_nameÚRenderContextÚrender_contextÚtemplater   r   )r   r   rM   rN   rO   r   r	   r
   r   ‡   s    zContext.__init__c                 c   s0   | j d k	rtdƒ‚|| _ z
d V  W 5 d | _ X d S ©Nz&Context is already bound to a template)rR   ÚRuntimeError)r   rR   r	   r	   r
   Úbind_template’   s    

zContext.bind_templatec                    s   t ƒ  ¡ }t| jƒ|_|S r   )r   r%   r   rQ   r$   r   r	   r
   r%   œ   s    
zContext.__copy__c                 C   s8   t |dƒstdƒ‚t|tƒr.|jdd…  ¡ }t| |ƒS )z;Push other_dict to the stack of dictionaries in the Contextr7   z6other_dict must be a mapping (dictionary-like) object.r,   N)ÚhasattrÚ	TypeErrorr-   r   r   r   r   )r   Ú
other_dictr	   r	   r
   rF   ¡   s
    

zContext.update)NTNN)
r   r   r   r   r   r   rU   r%   rF   r   r	   r	   r   r
   rK   …   s   
	rK   c                   @   sD   e Zd ZdZdZdd„ Zdd„ Zddd„Zd	d
„ Ze	ddd„ƒZ
dS )rP   aÈ  
    A stack container for storing Template state.

    RenderContext simplifies the implementation of template Nodes by providing a
    safe place to store state between invocations of a node's `render` method.

    The RenderContext also provides scoping rules that are more sensible for
    'template local' variables. The render context stack is pushed before each
    template is rendered, creating a fresh scope with nothing in it. Name
    resolution fails if a variable is not found at the top of the RequestContext
    stack. Thus, variables are local to a specific template and don't affect the
    rendering of other templates as they would if they were stored in the normal
    template context.
    Nc                 c   s   | j d E d H  d S ©Nr1   r2   r   r	   r	   r
   r*   »   s    zRenderContext.__iter__c                 C   s   || j d kS rY   r2   r8   r	   r	   r
   r>   ¾   s    zRenderContext.__contains__c                 C   s   | j d  ||¡S rY   )r   r@   )r   r3   r?   r	   r	   r
   r@   Á   s    zRenderContext.getc                 C   s   | j d | S rY   r2   r8   r	   r	   r
   r7   Ä   s    zRenderContext.__getitem__Tc                 c   s<   | j }|| _ |r|  ¡  z
d V  W 5 || _ |r6|  ¡  X d S r   )rR   r/   r   )r   rR   Zisolated_contextÚinitialr	   r	   r
   Ú
push_stateÇ   s    
zRenderContext.push_state)N)T)r   r   r   r   rR   r*   r>   r@   r7   r   r[   r	   r	   r	   r
   rP   ª   s   
rP   c                       s<   e Zd ZdZd
‡ fdd„	Zedd„ ƒZd‡ fdd	„	Z‡  ZS )ÚRequestContextzù
    This subclass of template.Context automatically populates itself using
    the processors defined in the engine's configuration.
    Additional processors can be specified as a list of callables
    using the "processors" keyword argument.
    NTc                    sT   t ƒ j||||d || _|d kr&dnt|ƒ| _t| jƒ| _|  i ¡ |  i ¡ d S )N)rN   rO   rM   r	   )	r   r   ÚrequestÚtupleÚ_processorsr0   r   Ú_processors_indexrF   )r   r]   r   Ú
processorsrN   rO   rM   r   r	   r
   r   Ü   s    
zRequestContext.__init__c              	   c   st   | j d k	rtdƒ‚|| _ |jj| j }i }|D ]}| || jƒ¡ q.|| j| j< z
d V  W 5 d | _ i | j| j< X d S rS   )	rR   rT   ZengineZtemplate_context_processorsr_   rF   r]   r   r`   )r   rR   ra   ZupdatesÚ	processorr	   r	   r
   rU   é   s    
ÿ
zRequestContext.bind_templatec                    s   t ƒ  |¡}t|dƒr|`|S )Nr`   )r   rE   rV   r`   rC   r   r	   r
   rE   þ   s    
zRequestContext.new)NNNNT)N)	r   r   r   r   r   r   rU   rE   r   r	   r	   r   r
   r\   Õ   s
   
r\   Nc                 K   sZ   | dk	r"t | tƒs"td| jj ƒ‚|dkr8t| f|Ž} n| }t|f|Ž} |rV|  |¡ | S )zT
    Create a suitable Context from a plain dict and optionally an HttpRequest.
    Nz&context must be a dict rather than %s.)r-   ÚdictrW   r   r   rK   r\   r/   )r   r]   r   Zoriginal_contextr	   r	   r
   Úmake_context  s    
rd   )N)Ú
contextlibr   r   Z_builtin_context_processorsÚ	Exceptionr   rc   r   r   rK   rP   r\   rd   r	   r	   r	   r
   Ú<module>   s   j%+2