/usr/lib/python2.7/dist-packages/owslib/wmc.py is in python-owslib 0.16.0-1.
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# =============================================================================
# Copyright (c) 2004 Sean C. Gillies
# Copyright (c) 2005 Nuxeo SARL <http://nuxeo.com>
#
# Authors : Sean Gillies <sgillies@frii.com>
# Julien Anguenot <ja@nuxeo.com>
#
# Contact email: sgillies@frii.com
# =============================================================================
"""Web Map Context (WMC)
Specification can be found over there :
https://portal.opengeospatial.org/files/?artifact_id=8618
"""
from __future__ import (absolute_import, division, print_function)
from .etree import etree
context_ns_uri = 'http://www.opengis.net/context'
context_schemas_uri = 'http://schemas.opengis.net/context/1.0.0/context.xsd'
def WMCElement(tag):
"""WMC based element
"""
return etree.Element("{%s}"%context_ns_uri + tag)
class MapContext:
""" Map Context abstraction
It uses a Map representation as input and export it as as map
context
"""
def __init__(self, map_):
self._map = map_
def _getRootElement(self):
root = WMCElement('ViewContext')
attrs = {
'{http://www.w3.org/2001/XMLSchema-instance}schemaLocation':
context_ns_uri + ' ' + context_schemas_uri,
'id' : self._map.id,
'version' : '1.0.0',
}
for k, v in attrs.items():
root.attrib[k] = v
return root
def _getGeneralElement(self):
general = WMCElement('General')
general.append(self._getWindowElement())
general.append(self._getBoundingBoxElement())
return general
def _getWindowElement(self):
window = WMCElement('Window')
window.attrib['width'] = str(self._map.size[0])
window.attrib['height'] = str(self._map.size[1])
return window
def _getBoundingBoxElement(self):
bbox = WMCElement('BoundingBox')
bbox.attrib['SRS'] = str(self._map.srs.split()[0])
bbox.attrib['minx'] = str(self._map.bounds[0])
bbox.attrib['miny'] = str(self._map.bounds[1])
bbox.attrib['maxx'] = str(self._map.bounds[2])
bbox.attrib['maxy'] = str(self._map.bounds[3])
return bbox
def _getLayerListElement(self):
layerlist = WMCElement('LayerList')
layering = zip(self._map.layernames, self._map.layertitles)
layer_infos = self._map.getLayerInfos()
# mapbuilder draws layers in bottom-top order
for name, title in layering:
# Layer
layer = WMCElement('Layer')
layer.attrib['queryable'] = '0'
layer.attrib['hidden'] = str(
int(name not in self._map.visible_layers))
# Layer styles
if layer_infos and layer_infos.get(title):
stylelist = WMCElement('StyleList')
# Get wms `Style` nodes for a given layer
for e_style in layer_infos.get(title):
e_style.attrib['current'] = '1'
# Change namespace to wmc
for node in e_style.getiterator():
tag_name = node.tag[node.tag.rfind('}')+1:]
node.tag = "{%s}"%context_ns_uri + tag_name
stylelist.append(e_style)
layer.append(stylelist)
# Server
server = WMCElement('Server')
server.attrib['service'] = 'OGC:WMS'
server.attrib['version'] = '1.1.1'
server.attrib['title'] = 'OGC:WMS'
# OnlineRessource
oressource = WMCElement('OnlineResource')
oressource.attrib[
'{http://www.w3.org/1999/xlink}type'] = 'simple'
oressource.attrib[
'{http://www.w3.org/1999/xlink}href'] = self._map.url
server.append(oressource)
layer.append(server)
# Name
e_name = WMCElement('Name')
e_name.text = name
layer.append(e_name)
# Title
e_title = WMCElement('Title')
e_title.text = title
layer.append(e_title)
# Format
formatlist = WMCElement('FormatList')
format = WMCElement('Format')
format.attrib['current'] = '1'
format.text = self._map.format
formatlist.append(format)
layer.append(formatlist)
layerlist.append(layer)
return layerlist
def __call__(self):
"""Export self._map to WMC
"""
wmc_doc_tree = self._getRootElement()
wmc_doc_tree.append(self._getGeneralElement())
wmc_doc_tree.append(self._getLayerListElement())
return etree.tostring(wmc_doc_tree)
class AggregateMapContext(MapContext):
""" Map Context abstraction
It uses a Map representation as input and export it as as map
context -- with aggregation of all layers accomplished through
overload of the Layer/Name property
"""
def _getLayerListElement(self):
layerlist = WMCElement('LayerList')
#layering = zip(self._map.layernames, self._map.layertitles)
layer_infos = self._map.getLayerInfos()
# Layer
layer = WMCElement('Layer')
layer.attrib['queryable'] = '0'
layer.attrib['hidden'] = '0'
# Server
server = WMCElement('Server')
server.attrib['service'] = 'OGC:WMS'
server.attrib['version'] = '1.1.1'
server.attrib['title'] = 'OGC:WMS'
# OnlineRessource
oressource = WMCElement('OnlineResource')
oressource.attrib['{http://www.w3.org/1999/xlink}type'] = 'simple'
oressource.attrib['{http://www.w3.org/1999/xlink}href'] = self._map.url
server.append(oressource)
layer.append(server)
# Name
e_name = WMCElement('Name')
e_name.text = ','.join(self._map.layernames)
layer.append(e_name)
# Title
e_title = WMCElement('Title')
e_title.text = 'Aggregate Layers'
layer.append(e_title)
# Format
formatlist = WMCElement('FormatList')
format = WMCElement('Format')
format.attrib['current'] = '1'
format.text = self._map.format
formatlist.append(format)
layer.append(formatlist)
layerlist.append(layer)
return layerlist
def mapToWebMapContext(map, aggregate_layers=False):
"""Helper
if the second argument evaluates to True, then all map layers are
aggregated into a single map context layer.
"""
if aggregate_layers:
return AggregateMapContext(map)()
else:
return MapContext(map)()
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