1 from django.contrib.gis.geos.base import GEOSBase

     2 from django.contrib.gis.geos.geometry import GEOSGeometry

     3 from django.contrib.gis.geos.prototypes import prepared as capi

     4 

     5 class PreparedGeometry(GEOSBase):

     6     """

     7     A geometry that is prepared for performing certain operations.

     8     At the moment this includes the contains covers, and intersects

     9     operations.

    10     """

    11     ptr_type = capi.PREPGEOM_PTR

    12 

    13     def __init__(self, geom):

    14         if not isinstance(geom, GEOSGeometry): raise TypeError

    15         self.ptr = capi.geos_prepare(geom.ptr)

    16 

    17     def __del__(self):

    18         if self._ptr: capi.prepared_destroy(self._ptr)

    19 

    20     def contains(self, other):

    21         return capi.prepared_contains(self.ptr, other.ptr)

    22 

    23     def contains_properly(self, other):

    24         return capi.prepared_contains_properly(self.ptr, other.ptr)

    25 

    26     def covers(self, other):

    27         return capi.prepared_covers(self.ptr, other.ptr)

    28 

    29     def intersects(self, other):

    30         return capi.prepared_intersects(self.ptr, other.ptr)