U
    Aޫ^K                     @   s   d Z ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddl	m
Z
 dd	l	mZ d
d ZG dd deZG dd deZdd Zdd Zdd ZdS )z
    flask.templating
    ~~~~~~~~~~~~~~~~

    Implements the bridge to Jinja2.

    :copyright: 2010 Pallets
    :license: BSD-3-Clause
    )
BaseLoader)Environment)TemplateNotFound   )_app_ctx_stack)_request_ctx_stack)before_render_template)template_renderedc                  C   sB   t j} tj}i }|dk	r"|j|d< | dk	r>| j|d< | j|d< |S )zSDefault template context processor.  Injects `request`,
    `session` and `g`.
    Ngrequestsession)r   topr   r
   r   r   )ZreqctxZappctxrv r   4/tmp/pip-unpacked-wheel-xbzl_6n2/flask/templating.py_default_template_ctx_processor   s    


r   c                   @   s   e Zd ZdZdd ZdS )r   zWorks like a regular Jinja2 environment but has some additional
    knowledge of how Flask's blueprint works so that it can prepend the
    name of the blueprint to referenced templates if necessary.
    c                 K   s,   d|kr|  |d< tj| f| || _d S )Nloader)Zcreate_global_jinja_loaderBaseEnvironment__init__app)selfr   optionsr   r   r   r   *   s    zEnvironment.__init__N)__name__
__module____qualname____doc__r   r   r   r   r   r   $   s   r   c                   @   s@   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	dS )DispatchingJinjaLoaderz\A loader that looks for templates in the application and all
    the blueprint folders.
    c                 C   s
   || _ d S N)r   )r   r   r   r   r   r   6   s    zDispatchingJinjaLoader.__init__c                 C   s$   | j jd r| ||S | ||S )NZEXPLAIN_TEMPLATE_LOADING)r   config_get_source_explained_get_source_fast)r   environmenttemplater   r   r   
get_source9   s    z!DispatchingJinjaLoader.get_sourcec           	   	   C   s   g }d }|  |D ]N\}}z|||}|d kr4|}W n tk
rN   d }Y nX ||||f qddlm} || j|| |d k	r|S t|d S )Nr   )!explain_template_loading_attempts)_iter_loadersr#   r   appendZdebughelpersr$   r   )	r   r!   r"   attemptsZtrvsrcobjr   r   r$   r   r   r   r   >   s    
z,DispatchingJinjaLoader._get_source_explainedc              	   C   sL   |  |D ]4\}}z|||W   S  tk
r<   Y q
Y q
X q
t|d S r   )r%   r#   r   )r   r!   r"   Z_srcobjr   r   r   r   r    S   s    z'DispatchingJinjaLoader._get_source_fastc                 c   sH   | j j}|d k	r| j |fV  | j  D ]}|j}|d k	r&||fV  q&d S r   )r   jinja_loaderiter_blueprints)r   r"   r   	blueprintr   r   r   r%   [   s    z$DispatchingJinjaLoader._iter_loadersc                 C   sb   t  }| jj}|d k	r$||  | j D ]*}|j}|d k	r.| D ]}|| qHq.t|S r   )setr   r)   updatelist_templatesr*   addlist)r   resultr   r+   r"   r   r   r   r.   e   s    z%DispatchingJinjaLoader.list_templatesN)
r   r   r   r   r   r#   r   r    r%   r.   r   r   r   r   r   1   s   
r   c                 C   s.   t j|| |d | |}tj|| |d |S )z)Renders the template and fires the signal)r"   context)r   sendrenderr	   )r"   r2   r   r   r   r   r   _rendert   s    
r5   c                 K   s*   t j}|j| t|jj| ||jS )a  Renders a template from the template folder with the given
    context.

    :param template_name_or_list: the name of the template to be
                                  rendered, or an iterable with template names
                                  the first one existing will be rendered
    :param context: the variables that should be available in the
                    context of the template.
    )r   r   r   update_template_contextr5   	jinja_envZget_or_select_template)Ztemplate_name_or_listr2   ctxr   r   r   render_template}   s    
r9   c                 K   s*   t j}|j| t|jj| ||jS )aF  Renders a template from the given template source string
    with the given context. Template variables will be autoescaped.

    :param source: the source code of the template to be
                   rendered
    :param context: the variables that should be available in the
                    context of the template.
    )r   r   r   r6   r5   r7   Zfrom_string)sourcer2   r8   r   r   r   render_template_string   s    	r;   N)r   Zjinja2r   r   r   r   globalsr   r   Zsignalsr   r	   r   r   r5   r9   r;   r   r   r   r   <module>   s   	C	