GMaps related JS changed to use new google namespace.
Google is going to change permanently in the future the way to
load its services, so better stay safe.
Also this commit shows uses of the new melange.js module.
Fixes Issue 634.
"""
This module houses the GEOS ctypes prototype functions for the
topological operations on geometries.
"""
from ctypes import c_char_p, c_double, c_int
from django.contrib.gis.geos.libgeos import lgeos, GEOM_PTR
from django.contrib.gis.geos.prototypes.errcheck import check_geom, check_string
def topology(func, *args):
"For GEOS unary topology functions."
argtypes = [GEOM_PTR]
if args: argtypes += args
func.argtypes = argtypes
func.restype = GEOM_PTR
func.errcheck = check_geom
return func
### Topology Routines ###
geos_boundary = topology(lgeos.GEOSBoundary)
geos_buffer = topology(lgeos.GEOSBuffer, c_double, c_int)
geos_centroid = topology(lgeos.GEOSGetCentroid)
geos_convexhull = topology(lgeos.GEOSConvexHull)
geos_difference = topology(lgeos.GEOSDifference, GEOM_PTR)
geos_envelope = topology(lgeos.GEOSEnvelope)
geos_intersection = topology(lgeos.GEOSIntersection, GEOM_PTR)
geos_pointonsurface = topology(lgeos.GEOSPointOnSurface)
geos_preservesimplify = topology(lgeos.GEOSTopologyPreserveSimplify, c_double)
geos_simplify = topology(lgeos.GEOSSimplify, c_double)
geos_symdifference = topology(lgeos.GEOSSymDifference, GEOM_PTR)
geos_union = topology(lgeos.GEOSUnion, GEOM_PTR)
# GEOSRelate returns a string, not a geometry.
geos_relate = lgeos.GEOSRelate
geos_relate.argtypes = [GEOM_PTR, GEOM_PTR]
geos_relate.errcheck = check_string