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#!/usr/bin/python
## Copyright (c) 2011 Astun Technology
## Permission is hereby granted, free of charge, to any person obtaining a copy
## of this software and associated documentation files (the "Software"), to deal
## in the Software without restriction, including without limitation the rights
## to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
## copies of the Software, and to permit persons to whom the Software is
## furnished to do so, subject to the following conditions:
## The above copyright notice and this permission notice shall be included in
## all copies or substantial portions of the Software.
## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
## IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
## AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
## THE SOFTWARE.
"""
A collection of classes used to manipulate Ordnance Survey GB GML data,
used with prepgml4ogr.py. (But here used/called from Stetl Filter)
"""
import os
from lxml import etree
class prep_osgml():
"""
Base class that provides the main interface methods `prepare_feature` and
`get_feat_types` and performs basic manipulation such as exposing the fid,
adding and element containing the filename of the source and adding an
element with the orientation in degrees.
"""
def __init__(self, inputfile):
self.inputfile = inputfile
self.feat_types = []
def get_feat_types(self):
return self.feat_types
def prepare_feature(self, feat_str):
# Parse the xml string into something useful
feat_elm = etree.fromstring(feat_str)
feat_elm = self._prepare_feat_elm(feat_elm)
return etree.tostring(feat_elm,
encoding='UTF-8',
pretty_print=True).decode('utf_8')
def _prepare_feat_elm(self, feat_elm):
feat_elm = self._add_fid_elm(feat_elm)
feat_elm = self._add_filename_elm(feat_elm)
feat_elm = self._add_orientation_degree_elms(feat_elm)
return feat_elm
def _add_fid_elm(self, feat_elm):
# Create an element with the fid
elm = etree.SubElement(feat_elm, "fid")
elm.text = feat_elm.get('fid')
return feat_elm
def _add_filename_elm(self, feat_elm):
# Create an element with the filename
elm = etree.SubElement(feat_elm, "filename")
elm.text = os.path.basename(self.inputfile)
return feat_elm
def _add_orientation_degree_elms(self, feat_elm):
# Correct any orientation values to be a
# tenth of their original value
orientation_elms = feat_elm.xpath('//orientation')
for elm in orientation_elms:
# Add a new orientDeg element as a child to the
# the orientation elm to be orientation/10
# (this applies integer division which is fine in
# this instance as we are not concerned with the decimals)
degree_elm = etree.SubElement(elm.getparent(), "orientDeg")
degree_elm.text = str(int(elm.text) / 10)
return feat_elm
class prep_vml(prep_osgml):
"""
Preperation class for OS VectorMap Local features.
"""
def __init__(self, inputfile):
prep_osgml.__init__(self, inputfile)
self.feat_types = [
'Text',
'VectorMapPoint',
'Line',
'RoadCLine',
'Area'
]
class prep_osmm_topo(prep_osgml):
"""
Preperation class for OS MasterMap features which in addition to the work
performed by `prep_osgml` adds `themes`, `descriptiveGroups` and
`descriptiveTerms` elements containing a delimited string of the attributes
that can appear multiple times.
"""
def __init__(self, inputfile):
prep_osgml.__init__(self, inputfile)
self.feat_types = [
'BoundaryLine',
'CartographicSymbol',
'CartographicText',
'TopographicArea',
'TopographicLine',
'TopographicPoint'
]
self.list_seperator = ', '
def _prepare_feat_elm(self, feat_elm):
feat_elm = prep_osgml._prepare_feat_elm(self, feat_elm)
feat_elm = self._add_lists_elms(feat_elm)
return feat_elm
def _add_lists_elms(self, feat_elm):
feat_elm = self._create_list_of_terms(feat_elm, 'theme')
feat_elm = self._create_list_of_terms(feat_elm, 'descriptiveGroup')
feat_elm = self._create_list_of_terms(feat_elm, 'descriptiveTerm')
return feat_elm
def _create_list_of_terms(self, feat_elm, name):
text_list = feat_elm.xpath('//%s/text()' % name)
if len(text_list):
elm = etree.SubElement(feat_elm, "%ss" % name)
elm.text = self.list_seperator.join(text_list)
return feat_elm
class prep_osmm_topo_qgis(prep_osmm_topo):
"""
Preperation class for OS MasterMap features which in addition to the work performed by
`prep_osmm_topo` adds QGIS specific label attributes such as `qFont` and `aAnchorPos`.
"""
def __init__(self, filename):
prep_osmm_topo.__init__(self, filename)
# AC - define the font
if os.name is 'posix':
# Will probably need different font names
self.fonts = ('Garamond', 'Arial', 'Roman', 'ScriptC')
elif os.name is 'nt':
# Ordnance Survey use
# 'Lutheran', 'Normal', 'Light Roman', 'Suppressed text'
self.fonts = ('GothicE', 'Monospac821 BT', 'Consolas', 'ScriptC', 'Arial Narrow')
elif os.name is 'mac':
# Will probably need different font name
self.fonts = ('Garamond', 'Arial', 'Roman', 'ScriptC')
# AC - the possible text placement positions used by QGIS
self.anchorPosition = ('Bottom Left', 'Left', 'Top Left', 'Bottom',
'Over', 'Top', 'Bottom Right', 'Right', 'Top Right')
def _prepare_feat_elm(self, feat_elm):
feat_elm = prep_osmm_topo._prepare_feat_elm(self, feat_elm)
feat_elm = self._add_qgis_elms(feat_elm)
return feat_elm
def _add_qgis_elms(self, feat_elm):
if feat_elm.tag == 'CartographicText':
text_render_elm = feat_elm.xpath('//textRendering')[0]
anchor_pos = int(text_render_elm.xpath('./anchorPosition/text()')[0])
try:
anchor_pos = self.anchorPosition[anchor_pos]
except:
anchor_pos = 4
elm = etree.SubElement(text_render_elm, 'qAnchorPos')
elm.text = anchor_pos
font = int(text_render_elm.xpath('./font/text()')[0])
try:
font = self.fonts[font]
except:
font = 'unknown font (%s)' % str(font)
elm = etree.SubElement(text_render_elm, 'qFont')
elm.text = font
return feat_elm
class prep_osmm_itn(prep_osgml):
"""
Preperation class for OS MasterMap ITN features.
"""
def __init__(self, filename):
prep_osgml.__init__(self, filename)
self.feat_types = [
'FerryLink',
'FerryNode',
'InformationPoint',
'Road',
'RoadNode',
'RoadNodeInformation',
'RoadLink',
'RoadLinkInformation',
'RoadRouteInformation'
]
def _prepare_feat_elm(self, feat_elm):
feat_elm = prep_osgml._prepare_feat_elm(self, feat_elm)
feat_elm = self._expose_links(feat_elm)
return feat_elm
def _expose_links(self, feat_elm):
link_list = feat_elm.xpath('//networkMember | //directedLink | //directedNode | //referenceToRoadLink | //referenceToRoadNode | //referenceToTopographicArea')
for elm in link_list:
for name in elm.attrib:
value = elm.get(name)
if name == 'href':
name = '%s_%s' % (elm.tag, 'ref')
value = value[1:]
elif name == 'orientation':
name = '%s_%s' % (elm.tag, name)
value = '1' if value == '+' else '0'
sub_elm = etree.SubElement(elm, name)
sub_elm.text = value
return feat_elm
class prep_addressbase():
"""
Simple preperation of AddressBase data
"""
def __init__(self, inputfile):
self.inputfile = inputfile
self.feat_types = ['Address']
def get_feat_types(self):
return self.feat_types
def prepare_feature(self, feat_str):
# Parse the xml string into something useful
feat_elm = etree.fromstring(feat_str)
feat_elm = self._prepare_feat_elm(feat_elm)
return etree.tostring(feat_elm,
encoding='UTF-8',
pretty_print=True).decode('utf_8')
def _prepare_feat_elm(self, feat_elm):
feat_elm = self._drop_gmlid(feat_elm)
return feat_elm
def _drop_gmlid(self, feat_elm):
feat_elm.attrib.pop('id')
return feat_elm
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