U
    mfv                     @   s   d dl Zd dlZd dlZd dlmZ d dlmZ d dlm	Z	 d dl
mZ G dd deZG dd	 d	eZG d
d deZG dd deZG dd dZG dd dejjZdS )    N)ceil)cached_property)method_has_no_args)gettext_lazyc                   @   s   e Zd ZdS )UnorderedObjectListWarningN__name__
__module____qualname__ r   r   9/tmp/pip-unpacked-wheel-siwebuq3/django/core/paginator.pyr      s   r   c                   @   s   e Zd ZdS )InvalidPageNr   r   r   r   r   r      s   r   c                   @   s   e Zd ZdS )PageNotAnIntegerNr   r   r   r   r   r      s   r   c                   @   s   e Zd ZdS )	EmptyPageNr   r   r   r   r   r      s   r   c                   @   s   e Zd ZedZdddZdd Zdd	 Zd
d Zdd Z	dd Z
edd Zedd Zedd Zdd Zd dddddZdS )!	Paginatoru   …r   Tc                 C   s,   || _ |   t|| _t|| _|| _d S N)object_list_check_object_list_is_orderedintper_pageorphansallow_empty_first_page)selfr   r   r   r   r   r   r   __init__    s
    

zPaginator.__init__c                 c   s   | j D ]}| |V  qd S r   )
page_rangepage)r   Zpage_numberr   r   r   __iter__'   s    
zPaginator.__iter__c              	   C   s   z"t |tr| stt|}W n$ ttfk
rF   ttdY nX |dk r\ttd|| j	kr|dkrv| j
rvnttd|S )z'Validate the given 1-based page number.z"That page number is not an integer   zThat page number is less than 1zThat page contains no results)
isinstancefloat
is_integer
ValueErrorr   	TypeErrorr   _r   	num_pagesr   r   numberr   r   r   validate_number+   s    
zPaginator.validate_numberc                 C   sJ   z|  |}W n0 tk
r&   d}Y n tk
r>   | j}Y nX | |S )zj
        Return a valid page, even if the page argument isn't a number or isn't
        in range.
        r   )r'   r   r   r$   r   r%   r   r   r   get_page<   s    zPaginator.get_pagec                 C   sP   |  |}|d | j }|| j }|| j | jkr8| j}| | j|| || S )z7Return a Page object for the given 1-based page number.r   )r'   r   r   count	_get_pager   )r   r&   Zbottomtopr   r   r   r   I   s    

zPaginator.pagec                 O   s
   t ||S )z
        Return an instance of a single page.

        This hook can be used by subclasses to use an alternative to the
        standard :cls:`Page` object.
        )Page)r   argskwargsr   r   r   r*   R   s    zPaginator._get_pagec                 C   s8   t | jdd}t|r.t|s.t|r.| S t| jS )z5Return the total number of objects, across all pages.r)   N)getattrr   callableinspect	isbuiltinr   len)r   cr   r   r   r)   [   s    zPaginator.countc                 C   s4   | j dkr| jsdS td| j | j }t|| j S )z!Return the total number of pages.r   r   )r)   r   maxr   r   r   )r   hitsr   r   r   r$   c   s    zPaginator.num_pagesc                 C   s   t d| jd S )zk
        Return a 1-based range of pages for iterating through within
        a template for loop.
        r   )ranger$   r   r   r   r   r   k   s    zPaginator.page_rangec                 C   sb   t | jdd}|dk	r^|s^t| jdr<d| jj| jjjn
d| j}tjd|t	dd dS )	zO
        Warn if self.object_list is unordered (typically a QuerySet).
        orderedNmodelz{} {}z{!r}zLPagination may yield inconsistent results with an unordered object_list: {}.   )
stacklevel)
r/   r   hasattrformatr:   	__class__r   warningswarnr   )r   r9   Zobj_list_reprr   r   r   r   s   s     
 
z'Paginator._check_object_list_is_orderedr   r;      )on_each_sideon_endsc                c   s  |  |}| j|| d kr,| jE dH  dS |d| | d krvtd|d E dH  | jV  t|| |d E dH  ntd|d E dH  || j| | d k rt|d || d E dH  | jV  t| j| d | jd E dH  nt|d | jd E dH  dS )u  
        Return a 1-based range of pages with some values elided.

        If the page range is larger than a given size, the whole range is not
        provided and a compact form is returned instead, e.g. for a paginator
        with 50 pages, if page 43 were the current page, the output, with the
        default arguments, would be:

            1, 2, …, 40, 41, 42, 43, 44, 45, 46, …, 49, 50.
        rB   Nr   )r'   r$   r   r7   ELLIPSIS)r   r&   rC   rD   r   r   r   get_elided_page_range   s    
"zPaginator.get_elided_page_rangeN)r   T)r   )r   r	   r
   r#   rE   r   r   r'   r(   r   r*   r   r)   r$   propertyr   r   rF   r   r   r   r   r      s   
		


r   c                   @   sd   e Z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 Zdd ZdS )r,   c                 C   s   || _ || _|| _d S r   )r   r&   	paginator)r   r   r&   rH   r   r   r   r      s    zPage.__init__c                 C   s   d| j | jjf S )Nz<Page %s of %s>r&   rH   r$   r8   r   r   r   __repr__   s    zPage.__repr__c                 C   s
   t | jS r   )r3   r   r8   r   r   r   __len__   s    zPage.__len__c                 C   sB   t |ttfs tdt|j t | jts8t| j| _| j| S )Nz0Page indices must be integers or slices, not %s.)r   r   slicer"   typer   r   list)r   indexr   r   r   __getitem__   s    zPage.__getitem__c                 C   s   | j | jjk S r   rI   r8   r   r   r   has_next   s    zPage.has_nextc                 C   s
   | j dkS Nr   )r&   r8   r   r   r   has_previous   s    zPage.has_previousc                 C   s   |   p|  S r   )rS   rQ   r8   r   r   r   has_other_pages   s    zPage.has_other_pagesc                 C   s   | j | jd S rR   rH   r'   r&   r8   r   r   r   next_page_number   s    zPage.next_page_numberc                 C   s   | j | jd S rR   rU   r8   r   r   r   previous_page_number   s    zPage.previous_page_numberc                 C   s&   | j jdkrdS | j j| jd  d S )z
        Return the 1-based index of the first object on this page,
        relative to total objects in the paginator.
        r   r   )rH   r)   r   r&   r8   r   r   r   start_index   s    zPage.start_indexc                 C   s$   | j | jjkr| jjS | j | jj S )z{
        Return the 1-based index of the last object on this page,
        relative to total objects found (hits).
        )r&   rH   r$   r)   r   r8   r   r   r   	end_index   s    zPage.end_indexN)r   r	   r
   r   rJ   rK   rP   rQ   rS   rT   rV   rW   rX   rY   r   r   r   r   r,      s   
r,   )collections.abccollectionsr1   r@   mathr   Zdjango.utils.functionalr   Zdjango.utils.inspectr   Zdjango.utils.translationr   r#   RuntimeWarningr   	Exceptionr   r   r   r   abcSequencer,   r   r   r   r   <module>   s    