
v^                 @   sp   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 Gd 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   S)!Polygon   c                s   | s) t    j |  j d d  |  d S| ^ } } t |  } | d k r t | d t t f  r | d s f  } d } n- t | d d t  r | d } t |  } |  j | d | f |   } t    j | |  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__ A/tmp/pip-build-8lau8j11/django/django/contrib/gis/geos/polygon.pyr      s    %
	
zPolygon.__init__c             c   s*   x# t  t |    D] } |  | Vq Wd 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   s   | \ } } } } xO | D]G } t  | t t f  s t d | | | | | | | | | | f
  Sq Wt | | 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y0Zx1y1zr   r   r   	from_bbox:   s    *zPolygon.from_bboxc       	         s   | s t  j   Sg  } xC | D]; } t | t  rB | j |  q | j   j |   q W  j | j d   } | d } | r t |   f d d   | D   } t |  } n d  } t  j	 | | t
 |   S)Nr   r	   c                s   g  |  ] }   j  |   q Sr   )_clone).0r)r   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   s0   t  | t  r t j |  St j | j  Sd  S)N)r   r   r'   
geom_cloneptr)r   gr   r   r   r#   _   s    zPolygon._clonezYParameter must be a sequence of LinearRings or objects that can initialize to LinearRingsc             C   sL   t  | t  r | Sy t |  } | SWn t k
 rG t |   Yn Xd 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   sG   |  j  } |  j } |  j | |  |  _  | r6 | |  _ t j |  d  S)N)r/   sridr   r'   Zdestroy_geom)r   r+   r,   Zprev_ptrr5   r   r   r   	_set_listp   s    			zPolygon._set_listc             C   s7   | d k r t  j |  j  St  j |  j | d  Sd 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_extringr/   Zget_intring)r   indexr   r   r   _get_single_internalz   s    zPolygon._get_single_internalc             C   s%   t  t j |  j |   d |  j S)Nr5   )r   r'   r.   r8   r5   )r   r7   r   r   r   _get_single_external   s    zPolygon._get_single_externalc             C   s   t  j |  j  S)z$Return the number of interior rings.)r'   Z
get_nringsr/   )r   r   r   r   r      s    zPolygon.num_interior_ringsc             C   s   |  d S)z%Get the exterior ring of the Polygon.r   r   )r   r   r   r   _get_ext_ring   s    zPolygon._get_ext_ringc             C   s   | |  d <d S)z%Set the exterior ring of the Polygon.r   Nr   )r   r4   r   r   r   _set_ext_ring   s    zPolygon._set_ext_ringc                s)   t    f d d   t t     D  S)z,Get the tuple for each ring in this Polygon.c             3   s   |  ] }   | j  Vq d  S)N)r   )r$   r   )r   r   r   	<genexpr>   s    z Polygon.tuple.<locals>.<genexpr>)r   r   r   )r   r   )r   r   r      s    zPolygon.tuplec                s@   d j    f d d   t   j  D  } d   d j | f S)z.Return the KML representation of this Polygon. c             3   s$   |  ] } d    | d j  Vq d S)z%<innerBoundaryIs>%s</innerBoundaryIs>r	   N)kml)r$   r   )r   r   r   r<      s   zPolygon.kml.<locals>.<genexpr>z:<Polygon><outerBoundaryIs>%s</outerBoundaryIs>%s</Polygon>r   )joinr   r   r>   )r   Z	inner_kmlr   )r   r   r>      s    zPolygon.kml)__name__
__module____qualname__Z
_minlengthr   r   r   classmethodr"   r   r#   r)   r6   r8   r9   r   Z_set_single_rebuildZ_set_singleZ_assign_extended_slice_rebuildZ_assign_extended_slicepropertyr   r:   r;   Zexterior_ringr-   r   Zcoordsr>   r   r   )r   r   r   	   s*   %

		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
   