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venv/Lib/site-packages/django/contrib/gis/geos/point.py

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+from ctypes import c_uint
+
+from django.contrib.gis import gdal
+from django.contrib.gis.geos import prototypes as capi
+from django.contrib.gis.geos.error import GEOSException
+from django.contrib.gis.geos.geometry import GEOSGeometry
+
+
+class Point(GEOSGeometry):
+    _minlength = 2
+    _maxlength = 3
+    has_cs = True
+
+    def __init__(self, x=None, y=None, z=None, srid=None):
+        """
+        The Point object may be initialized with either a tuple, or individual
+        parameters.
+
+        For example:
+        >>> p = Point((5, 23))  # 2D point, passed in as a tuple
+        >>> p = Point(5, 23, 8)  # 3D point, passed in with individual parameters
+        """
+        if x is None:
+            coords = []
+        elif isinstance(x, (tuple, list)):
+            # Here a tuple or list was passed in under the `x` parameter.
+            coords = x
+        elif isinstance(x, (float, int)) and isinstance(y, (float, int)):
+            # Here X, Y, and (optionally) Z were passed in individually, as parameters.
+            if isinstance(z, (float, int)):
+                coords = [x, y, z]
+            else:
+                coords = [x, y]
+        else:
+            raise TypeError('Invalid parameters given for Point initialization.')
+
+        point = self._create_point(len(coords), coords)
+
+        # Initializing using the address returned from the GEOS
+        #  createPoint factory.
+        super().__init__(point, srid=srid)
+
+    def _to_pickle_wkb(self):
+        return None if self.empty else super()._to_pickle_wkb()
+
+    def _from_pickle_wkb(self, wkb):
+        return self._create_empty() if wkb is None else super()._from_pickle_wkb(wkb)
+
+    def _ogr_ptr(self):
+        return gdal.geometries.Point._create_empty() if self.empty else super()._ogr_ptr()
+
+    @classmethod
+    def _create_empty(cls):
+        return cls._create_point(None, None)
+
+    @classmethod
+    def _create_point(cls, ndim, coords):
+        """
+        Create a coordinate sequence, set X, Y, [Z], and create point
+        """
+        if not ndim:
+            return capi.create_point(None)
+
+        if ndim < 2 or ndim > 3:
+            raise TypeError('Invalid point dimension: %s' % ndim)
+
+        cs = capi.create_cs(c_uint(1), c_uint(ndim))
+        i = iter(coords)
+        capi.cs_setx(cs, 0, next(i))
+        capi.cs_sety(cs, 0, next(i))
+        if ndim == 3:
+            capi.cs_setz(cs, 0, next(i))
+
+        return capi.create_point(cs)
+
+    def _set_list(self, length, items):
+        ptr = self._create_point(length, items)
+        if ptr:
+            srid = self.srid
+            capi.destroy_geom(self.ptr)
+            self._ptr = ptr
+            if srid is not None:
+                self.srid = srid
+            self._post_init()
+        else:
+            # can this happen?
+            raise GEOSException('Geometry resulting from slice deletion was invalid.')
+
+    def _set_single(self, index, value):
+        self._cs.setOrdinate(index, 0, value)
+
+    def __iter__(self):
+        "Iterate over coordinates of this Point."
+        for i in range(len(self)):
+            yield self[i]
+
+    def __len__(self):
+        "Return the number of dimensions for this Point (either 0, 2 or 3)."
+        if self.empty:
+            return 0
+        if self.hasz:
+            return 3
+        else:
+            return 2
+
+    def _get_single_external(self, index):
+        if index == 0:
+            return self.x
+        elif index == 1:
+            return self.y
+        elif index == 2:
+            return self.z
+
+    _get_single_internal = _get_single_external
+
+    @property
+    def x(self):
+        "Return the X component of the Point."
+        return self._cs.getOrdinate(0, 0)
+
+    @x.setter
+    def x(self, value):
+        "Set the X component of the Point."
+        self._cs.setOrdinate(0, 0, value)
+
+    @property
+    def y(self):
+        "Return the Y component of the Point."
+        return self._cs.getOrdinate(1, 0)
+
+    @y.setter
+    def y(self, value):
+        "Set the Y component of the Point."
+        self._cs.setOrdinate(1, 0, value)
+
+    @property
+    def z(self):
+        "Return the Z component of the Point."
+        return self._cs.getOrdinate(2, 0) if self.hasz else None
+
+    @z.setter
+    def z(self, value):
+        "Set the Z component of the Point."
+        if not self.hasz:
+            raise GEOSException('Cannot set Z on 2D Point.')
+        self._cs.setOrdinate(2, 0, value)
+
+    # ### Tuple setting and retrieval routines. ###
+    @property
+    def tuple(self):
+        "Return a tuple of the point."
+        return self._cs.tuple
+
+    @tuple.setter
+    def tuple(self, tup):
+        "Set the coordinates of the point with the given tuple."
+        self._cs[0] = tup
+
+    # The tuple and coords properties
+    coords = tuple