U
    Ha                     @   sT   d dl mZm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dS )	    )byrefc_uint)
prototypes)GEOSGeometry)GEOM_PTR)
LinearRingc                       s   e Zd ZdZ fddZdd Zdd Zedd	 Zd
d Z	dd Z
d!ddZdd Zdd Zdd ZejZejZedd Zdd Zdd ZeeeZeZedd ZeZedd  Z  ZS )"Polygon   c                    s   |s t  j| ddf| dS |^}}t|}|dkr~t|d ttfr~|d s\d}d}n"t|d d tr~|d }t|}| |d |f|}t  j|f| dS )a  
        Initialize on an exterior ring and a sequence of holes (both
        instances may be either LinearRing instances, or a tuple/list
        that may be constructed into a LinearRing).

        Examples of initialization, where shell, hole1, and hole2 are
        valid LinearRing geometries:
        >>> from django.contrib.gis.geos import LinearRing, Polygon
        >>> shell = hole1 = hole2 = LinearRing()
        >>> poly = Polygon(shell, hole1, hole2)
        >>> poly = Polygon(shell, (hole1, hole2))

        >>> # Example where a tuple parameters are used:
        >>> poly = Polygon(((0, 0), (0, 10), (10, 10), (0, 10), (0, 0)),
        ...                ((4, 4), (4, 6), (6, 6), (6, 4), (4, 4)))
        r   Nr	    )super__init___create_polygonlen
isinstancetuplelistr   )selfargskwargsZext_ringZ
init_holesn_holesZpolygon	__class__r
   C/tmp/pip-unpacked-wheel-3jxiddxt/django/contrib/gis/geos/polygon.pyr      s    zPolygon.__init__c                 c   s    t t| D ]}| | V  qdS )z&Iterate over each ring in the polygon.N)ranger   )r   ir
   r
   r   __iter__1   s    zPolygon.__iter__c                 C   s
   | j d S )z+Return the number of rings in this Polygon.r	   )num_interior_ringsr   r
   r
   r   __len__6   s    zPolygon.__len__c                 C   sn   |\}}}}|D ]6}t |ttfstd||||||||||f
   S qt||f||f||f||f||ffS )z2Construct a Polygon from a bounding box (4-tuple).z,POLYGON((%s %s, %s %s, %s %s, %s %s, %s %s)))r   floatintr   r   )clsZbboxZx0Zy0x1y1zr
   r
   r   	from_bbox:   s    zPolygon.from_bboxc           	         s   |st  S g }|D ]*}t|tr.|| q| | q |d}|d }|rt|  fdd|D  }t|}nd }t 	||t
|S )Nr   r	   c                    s   g | ]}  |qS r
   )_clone).0rr   r
   r   
<listcomp>X   s     z+Polygon._create_polygon.<locals>.<listcomp>)capiZcreate_empty_polygonr   r   append_construct_ringr&   popr   Zcreate_polygonr   )	r   lengthitemsZringsr(   shellr   ZholesZholes_paramr
   r   r   r   E   s    

zPolygon._create_polygonc                 C   s$   t |trt|S t|jS d S N)r   r   r*   
geom_cloneptr)r   gr
   r
   r   r&   _   s    

zPolygon._cloneYParameter must be a sequence of LinearRings or objects that can initialize to LinearRingsc                 C   s>   t |tr|S zt|}|W S  tk
r8   t|Y nX dS )z1Try to construct a ring from the given parameter.N)r   r   	TypeError)r   parammsgringr
   r
   r   r,   e   s    
zPolygon._construct_ringc                 C   s2   | j }| j}| ||| _ |r$|| _t| d S r1   )r3   sridr   r*   Zdestroy_geom)r   r.   r/   Zprev_ptrr:   r
   r
   r   	_set_listp   s    zPolygon._set_listc                 C   s*   |dkrt | jS t | j|d S dS )a7  
        Return the ring at the specified index. The first index, 0, will
        always return the exterior ring.  Indices > 0 will return the
        interior ring at the given index (e.g., poly[1] and poly[2] would
        return the first and second interior ring, respectively).

        CAREFUL: Internal/External are not the same as Interior/Exterior!
        Return a pointer from the existing geometries for use internally by the
        object's methods. _get_single_external() returns a clone of the same
        geometry for use by external code.
        r   r	   N)r*   Zget_extringr3   Zget_intringr   indexr
   r
   r   _get_single_internalz   s    zPolygon._get_single_internalc                 C   s   t t| || jdS )N)r:   )r   r*   r2   r>   r:   r<   r
   r
   r   _get_single_external   s    zPolygon._get_single_externalc                 C   s   t | jS )z$Return the number of interior rings.)r*   Z
get_nringsr3   r   r
   r
   r   r      s    zPolygon.num_interior_ringsc                 C   s   | d S )z%Get the exterior ring of the Polygon.r   r
   r   r
   r
   r   _get_ext_ring   s    zPolygon._get_ext_ringc                 C   s   || d< dS )z%Set the exterior ring of the Polygon.r   Nr
   )r   r9   r
   r
   r   _set_ext_ring   s    zPolygon._set_ext_ringc                    s   t  fddtt D S )z,Get the tuple for each ring in this Polygon.c                 3   s   | ]} | j V  qd S r1   )r   r'   r   r   r
   r   	<genexpr>   s     z Polygon.tuple.<locals>.<genexpr>)r   r   r   r   r
   r   r   r      s    zPolygon.tuplec                    s0   d  fddt jD }d d j|f S )z.Return the KML representation of this Polygon. c                 3   s    | ]}d  |d  j  V  qdS )z%<innerBoundaryIs>%s</innerBoundaryIs>r	   N)kmlrB   r   r
   r   rC      s   zPolygon.kml.<locals>.<genexpr>z:<Polygon><outerBoundaryIs>%s</outerBoundaryIs>%s</Polygon>r   )joinr   r   rE   )r   Z	inner_kmlr
   r   r   rE      s    zPolygon.kml)r5   )__name__
__module____qualname__Z
_minlengthr   r   r   classmethodr%   r   r&   r,   r;   r>   r?   r   Z_set_single_rebuildZ_set_singleZ_assign_extended_slice_rebuildZ_assign_extended_slicepropertyr   r@   rA   Zexterior_ringr0   r   ZcoordsrE   __classcell__r
   r
   r   r   r   	   s4   %

 




r   N)ctypesr   r   Zdjango.contrib.gis.geosr   r*   Z django.contrib.gis.geos.geometryr   Zdjango.contrib.gis.geos.libgeosr   Z"django.contrib.gis.geos.linestringr   r   r
   r
   r
   r   <module>   s
   