/django/contrib/gis/geos/prepared.py

 1from django.contrib.gis.geos.base import GEOSBase
 2from django.contrib.gis.geos.geometry import GEOSGeometry
 3from django.contrib.gis.geos.prototypes import prepared as capi
 4
 5class 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)