django1/django/contrib/gis/geos/prepared.py

55 lines
1.7 KiB
Python

from .base import GEOSBase
from .prototypes import prepared as capi
class PreparedGeometry(GEOSBase):
"""
A geometry that is prepared for performing certain operations.
At the moment this includes the contains covers, and intersects
operations.
"""
ptr_type = capi.PREPGEOM_PTR
def __init__(self, geom):
# Keeping a reference to the original geometry object to prevent it
# from being garbage collected which could then crash the prepared one
# See #21662
self._base_geom = geom
from .geometry import GEOSGeometry
if not isinstance(geom, GEOSGeometry):
raise TypeError
self.ptr = capi.geos_prepare(geom.ptr)
def __del__(self):
try:
capi.prepared_destroy(self._ptr)
except (AttributeError, TypeError):
pass # Some part might already have been garbage collected
def contains(self, other):
return capi.prepared_contains(self.ptr, other.ptr)
def contains_properly(self, other):
return capi.prepared_contains_properly(self.ptr, other.ptr)
def covers(self, other):
return capi.prepared_covers(self.ptr, other.ptr)
def intersects(self, other):
return capi.prepared_intersects(self.ptr, other.ptr)
def crosses(self, other):
return capi.prepared_crosses(self.ptr, other.ptr)
def disjoint(self, other):
return capi.prepared_disjoint(self.ptr, other.ptr)
def overlaps(self, other):
return capi.prepared_overlaps(self.ptr, other.ptr)
def touches(self, other):
return capi.prepared_touches(self.ptr, other.ptr)
def within(self, other):
return capi.prepared_within(self.ptr, other.ptr)