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# Copyright (C) 2001 by Intevation GmbH |
# Copyright (C) 2001, 2002, 2003 by Intevation GmbH |
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# Authors: |
# Authors: |
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# Jan-Oliver Wagner <[email protected]> |
# Jan-Oliver Wagner <[email protected]> |
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# Bernhard Herzog <[email protected]> |
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# Jonathan Coles <[email protected]> |
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# |
# |
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# This program is free software under the GPL (>=v2) |
# This program is free software under the GPL (>=v2) |
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# Read the file COPYING coming with GRASS for details. |
# Read the file COPYING coming with GRASS for details. |
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__version__ = "$Revision$" |
__version__ = "$Revision$" |
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import sys, string, os |
import string, os |
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import xml.sax |
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import xml.sax.handler |
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from xml.sax import make_parser, ErrorHandler, SAXNotRecognizedException |
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from Thuban import _ |
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from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \ |
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FIELDTYPE_STRING |
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from Thuban.Model.session import Session |
from Thuban.Model.session import Session |
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from Thuban.Model.map import Map |
from Thuban.Model.map import Map |
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from Thuban.Model.layer import Layer |
from Thuban.Model.layer import Layer, RasterLayer |
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from Thuban.Model.color import Color |
from Thuban.Model.color import Color |
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from Thuban.Model.proj import Projection |
from Thuban.Model.proj import Projection |
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from Thuban.Model.range import Range |
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from Thuban.Model.classification import Classification, \ |
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ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap, \ |
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ClassGroupProperties |
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from Thuban.Model.data import DerivedShapeStore, ShapefileStore |
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from Thuban.Model.table import DBFTable |
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from Thuban.Model.transientdb import TransientJoinedTable |
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oldPython=0 |
class LoadError(Exception): |
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pass |
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if not sys.__dict__.has_key("version_info"): |
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# We can assume to have python 1.5.2 or lower here now |
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oldPython=1 |
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if oldPython: |
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try: |
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from xml.sax.saxexts import make_parser |
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from xml.sax.saxlib import HandlerBase |
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from xml.sax import saxutils |
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except ImportError: |
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sys.stdout.write(("You need to have Python-XML installed or" |
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" a modern Python!\n" |
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"Check www.python.org/sigs/xml-sig/\n\n")) |
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raise |
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else: |
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# Do the python 2.0 standard xml thing and map it on the old names |
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import xml.sax |
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import xml.sax.handler |
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HandlerBase=xml.sax.handler.ContentHandler |
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from xml.sax import make_parser |
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class testSAXContentHandler(HandlerBase): |
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# SAX compliant |
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def characters(self, ch, start, length): |
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pass |
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def test_for_broken_SAX(): |
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ch=testSAXContentHandler() |
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try: |
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xml.sax.parseString("""<?xml version="1.0"?> |
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<child1 name="paul">Text goes here</child1> |
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""",ch) |
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except TypeError: |
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return 1 |
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return 0 |
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from Thuban.Model.xmlreader import XMLReader |
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import resource |
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def parse_color(color): |
def parse_color(color): |
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""" |
"""Return the color object for the string color. |
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Return the color object for the string color. Color may be either |
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'None' or of the form '#RRGGBB' in the usual HTML color notation |
Color may be either 'None' or of the form '#RRGGBB' in the usual |
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HTML color notation |
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""" |
""" |
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color = string.strip(color) |
color = string.strip(color) |
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if color == "None": |
if color == "None": |
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result = None |
result = Color.Transparent |
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elif color[0] == '#': |
elif color[0] == '#': |
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if len(color) == 7: |
if len(color) == 7: |
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r = string.atoi(color[1:3], 16) / 255.0 |
r = string.atoi(color[1:3], 16) / 255.0 |
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b = string.atoi(color[5:7], 16) / 255.0 |
b = string.atoi(color[5:7], 16) / 255.0 |
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result = Color(r, g, b) |
result = Color(r, g, b) |
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else: |
else: |
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raise ValueError("Invalid hexadecimal color specification %s" |
raise ValueError(_("Invalid hexadecimal color specification %s") |
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% color) |
% color) |
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else: |
else: |
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raise ValueError("Invalid color specification %s" % color) |
raise ValueError(_("Invalid color specification %s") % color) |
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return result |
return result |
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class AttrDesc: |
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class ProcessSession(HandlerBase): |
def __init__(self, name, required = False, default = "", |
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conversion = None): |
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def __init__(self, directory): |
if not isinstance(name, tuple): |
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"""Inititialize the Sax handler. |
fullname = (None, name) |
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else: |
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fullname = name |
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name = name[1] |
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self.name = name |
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self.fullname = fullname |
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self.required = required |
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self.default = default |
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self.conversion = conversion |
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# set by the SessionLoader's check_attrs method |
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self.value = None |
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class SessionLoader(XMLReader): |
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def __init__(self): |
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"""Inititialize the Sax handler.""" |
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XMLReader.__init__(self) |
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directory is the directory containing the session file. It's |
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needed to interpret embedded relative filenames |
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""" |
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self.directory = directory |
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self.chars = '' |
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self.theSession = None |
self.theSession = None |
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self.aMap = None |
self.aMap = None |
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self.aLayer = None |
self.aLayer = None |
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def startElement(self, name, attrs): |
# Map ids used in the thuban file to the corresponding objects |
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if name == 'session': |
# in the session |
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self.theSession = Session(attrs.get('title', None)) |
self.idmap = {} |
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elif name == 'map': |
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self.aMap = Map(attrs.get('title', None)) |
dispatchers = { |
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elif name == 'projection': |
'session' : ("start_session", "end_session"), |
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self.ProjectionParams = [ ] |
'fileshapesource': ("start_fileshapesource", None), |
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elif name == 'parameter': |
'derivedshapesource': ("start_derivedshapesource", None), |
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self.ProjectionParams.append(attrs.get('value', None)) |
'filetable': ("start_filetable", None), |
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elif name == 'layer': |
'jointable': ("start_jointable", None), |
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title = attrs.get('title', "") |
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filename = attrs.get('filename', "") |
'map' : ("start_map", "end_map"), |
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filename = os.path.join(self.directory, filename) |
'projection' : ("start_projection", "end_projection"), |
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fill = parse_color(attrs.get('fill', "None")) |
'parameter' : ("start_parameter", None), |
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stroke = parse_color(attrs.get('stroke', "#000000")) |
'layer' : ("start_layer", "end_layer"), |
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self.aLayer = Layer(title, filename, fill = fill, stroke = stroke) |
'rasterlayer' : ("start_rasterlayer", "end_rasterlayer"), |
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elif name == 'table': |
'classification': ("start_classification", "end_classification"), |
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print "table title: %s" % attrs.get('title', None) |
'clnull' : ("start_clnull", "end_clnull"), |
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elif name == 'labellayer': |
'clpoint' : ("start_clpoint", "end_clpoint"), |
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self.aLayer = self.aMap.LabelLayer() |
'clrange' : ("start_clrange", "end_clrange"), |
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elif name == 'label': |
'cldata' : ("start_cldata", "end_cldata"), |
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x = float(attrs['x']) |
'table' : ("start_table", "end_table"), |
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y = float(attrs['y']) |
'labellayer' : ("start_labellayer", None), |
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text = attrs['text'] |
'label' : ("start_label", None)} |
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halign = attrs['halign'] |
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valign = attrs['valign'] |
# all dispatchers should be used for the 0.8 namespace |
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self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign) |
xmlns = "http://thuban.intevation.org/dtds/thuban-0.8.dtd" |
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for key, value in dispatchers.items(): |
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dispatchers[(xmlns, key)] = value |
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if not oldPython and test_for_broken_SAX(): |
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# works with python 2.0, but is not SAX compliant |
XMLReader.AddDispatchers(self, dispatchers) |
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def characters(self, ch): |
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self.my_characters(ch) |
def start_session(self, name, qname, attrs): |
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else: |
self.theSession = Session(self.encode(attrs.get((None, 'title'), |
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# SAX compliant |
None))) |
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def characters(self, ch, start, length): |
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self.my_characters(ch[start:start+length]) |
def end_session(self, name, qname): |
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pass |
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def my_characters(self, ch): |
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self.chars = self.chars + ch |
def check_attrs(self, element, attrs, descr): |
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"""Check and convert some of the attributes of an element |
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def endElement(self, name): |
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# If it's not a parameter element, ignore it |
Parameters: |
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if name == 'session': |
element -- The element name |
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#print "end of session" |
attrs -- The attrs mapping as passed to the start_* methods |
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pass |
descr -- Sequence of attribute descriptions (AttrDesc instances) |
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if name == 'map': |
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self.theSession.AddMap(self.aMap) |
Return a dictionary containig normalized versions of the |
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if name == 'projection': |
attributes described in descr. The keys of that dictionary are |
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self.aMap.SetProjection(Projection(self.ProjectionParams)) |
the name attributes of the attribute descriptions. The attrs |
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if name == 'layer': |
dictionary will not be modified. |
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self.aMap.AddLayer(self.aLayer) |
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if name == 'table': |
If the attribute is required, i.e. the 'required' attribute of |
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#print "end of table" |
the descrtiption is true, but it is not in attrs, raise a |
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LoadError. |
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If the attribute has a default value and it is not present in |
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attrs, use that default value as the value in the returned dict. |
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If a conversion is specified, convert the value before putting |
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it into the returned dict. The following conversions are |
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available: |
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'filename' -- The attribute is a filename. |
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If the filename is a relative name, interpret |
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it relative to the directory containing the |
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.thuban file and make it an absolute name |
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'shapestore' -- The attribute is the ID of a shapestore |
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defined earlier in the .thuban file. Look it |
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up self.idmap |
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'table' -- The attribute is the ID of a table or shapestore |
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defined earlier in the .thuban file. Look it up |
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self.idmap. If it's the ID of a shapestore the |
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value will be the table of the shapestore. |
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""" |
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normalized = {} |
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for d in descr: |
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if d.required and not attrs.has_key(d.fullname): |
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pass |
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#raise LoadError("Element %s requires an attribute %r" |
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# % (element, d.name)) |
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value = attrs.get(d.fullname, d.default) |
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if d.conversion == "shapesource": |
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if value in self.idmap: |
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value = self.idmap[value] |
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else: |
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raise LoadError("Element %s requires an already defined ID" |
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" in attribute %r" |
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% (element, d.name)) |
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elif d.conversion == "table": |
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if value in self.idmap: |
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value = self.idmap[value] |
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if isinstance(value, ShapefileStore): |
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value = value.Table() |
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else: |
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raise LoadError("Element %s requires an already defined ID" |
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" in attribute %r" |
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% (element, d.name)) |
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elif d.conversion == "filename": |
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value = os.path.abspath(os.path.join(self.GetDirectory(), |
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value)) |
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normalized[d.name] = value |
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return normalized |
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def start_fileshapesource(self, name, qname, attrs): |
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attrs = self.check_attrs(name, attrs, |
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[AttrDesc("id", True), |
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AttrDesc("filename", True, |
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conversion = "filename"), |
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AttrDesc("filetype", True)]) |
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ID = attrs["id"] |
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filename = attrs["filename"] |
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filetype = attrs["filetype"] |
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if filetype != "shapefile": |
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raise LoadError("shapesource filetype %r not supported" % filetype) |
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self.idmap[ID] = self.theSession.OpenShapefile(filename) |
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def start_derivedshapesource(self, name, qname, attrs): |
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attrs = self.check_attrs(name, attrs, |
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[AttrDesc("id", True), |
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AttrDesc("shapesource", True, |
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conversion = "shapesource"), |
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AttrDesc("table", True, conversion="table")]) |
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store = DerivedShapeStore(attrs["shapesource"], attrs["table"]) |
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self.theSession.AddShapeStore(store) |
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self.idmap[attrs["id"]] = store |
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def start_filetable(self, name, qname, attrs): |
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attrs = self.check_attrs(name, attrs, |
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[AttrDesc("id", True), |
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AttrDesc("title", True), |
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AttrDesc("filename", True, |
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conversion = "filename"), |
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AttrDesc("filetype")]) |
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filetype = attrs["filetype"] |
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if filetype != "DBF": |
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raise LoadError("shapesource filetype %r not supported" % filetype) |
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table = DBFTable(attrs["filename"]) |
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table.SetTitle(attrs["title"]) |
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self.idmap[attrs["id"]] = self.theSession.AddTable(table) |
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def start_jointable(self, name, qname, attrs): |
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attrs = self.check_attrs(name, attrs, |
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[AttrDesc("id", True), |
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AttrDesc("title", True), |
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AttrDesc("left", True, conversion="table"), |
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AttrDesc("leftcolumn", True), |
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AttrDesc("right", True, conversion="table"), |
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AttrDesc("rightcolumn")]) |
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table = TransientJoinedTable(self.theSession.TransientDB(), |
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attrs["left"], attrs["leftcolumn"], |
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attrs["right"], attrs["rightcolumn"]) |
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table.SetTitle(attrs["title"]) |
256 |
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self.idmap[attrs["id"]] = self.theSession.AddTable(table) |
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|
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def start_map(self, name, qname, attrs): |
259 |
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"""Start a map.""" |
260 |
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self.aMap = Map(attrs.get((None, 'title'), None)) |
261 |
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262 |
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def end_map(self, name, qname): |
263 |
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self.theSession.AddMap(self.aMap) |
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self.aMap = None |
265 |
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def start_projection(self, name, qname, attrs): |
267 |
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self.ProjectionName = self.encode(attrs.get((None, 'name'), None)) |
268 |
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self.ProjectionParams = [ ] |
269 |
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270 |
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def end_projection(self, name, qname): |
271 |
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if self.aLayer is not None: |
272 |
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obj = self.aLayer |
273 |
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elif self.aMap is not None: |
274 |
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obj = self.aMap |
275 |
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else: |
276 |
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assert False, "projection tag out of context" |
277 |
pass |
pass |
278 |
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|
279 |
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obj.SetProjection( |
280 |
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Projection(self.ProjectionParams, self.ProjectionName)) |
281 |
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|
282 |
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def start_parameter(self, name, qname, attrs): |
283 |
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s = attrs.get((None, 'value')) |
284 |
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s = str(s) # we can't handle unicode in proj |
285 |
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self.ProjectionParams.append(s) |
286 |
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|
287 |
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def start_layer(self, name, qname, attrs, layer_class = Layer): |
288 |
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"""Start a layer |
289 |
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|
290 |
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Instantiate a layer of class layer_class from the attributes in |
291 |
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attrs which may be a dictionary as well as the normal SAX attrs |
292 |
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object and bind it to self.aLayer. |
293 |
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""" |
294 |
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title = self.encode(attrs.get((None, 'title'), "")) |
295 |
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filename = attrs.get((None, 'filename'), "") |
296 |
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filename = os.path.join(self.GetDirectory(), filename) |
297 |
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filename = self.encode(filename) |
298 |
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visible = self.encode(attrs.get((None, 'visible'), "true")) != "false" |
299 |
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fill = parse_color(attrs.get((None, 'fill'), "None")) |
300 |
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stroke = parse_color(attrs.get((None, 'stroke'), "#000000")) |
301 |
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stroke_width = int(attrs.get((None, 'stroke_width'), "1")) |
302 |
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if attrs.has_key((None, "shapestore")): |
303 |
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store = self.idmap[attrs[(None, "shapestore")]] |
304 |
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else: |
305 |
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store = self.theSession.OpenShapefile(filename) |
306 |
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self.aLayer = layer_class(title, store, |
307 |
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fill = fill, stroke = stroke, |
308 |
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lineWidth = stroke_width, |
309 |
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visible = visible) |
310 |
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|
311 |
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def end_layer(self, name, qname): |
312 |
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self.aMap.AddLayer(self.aLayer) |
313 |
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self.aLayer = None |
314 |
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|
315 |
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def start_rasterlayer(self, name, qname, attrs, layer_class = RasterLayer): |
316 |
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title = self.encode(attrs.get((None, 'title'), "")) |
317 |
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filename = attrs.get((None, 'filename'), "") |
318 |
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filename = os.path.join(self.GetDirectory(), filename) |
319 |
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filename = self.encode(filename) |
320 |
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visible = self.encode(attrs.get((None, 'visible'), "true")) != "false" |
321 |
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|
322 |
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self.aLayer = layer_class(title, filename, visible = visible) |
323 |
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|
324 |
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def end_rasterlayer(self, name, qname): |
325 |
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self.aMap.AddLayer(self.aLayer) |
326 |
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self.aLayer = None |
327 |
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|
328 |
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def start_classification(self, name, qname, attrs): |
329 |
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field = attrs.get((None, 'field'), None) |
330 |
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|
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fieldType = attrs.get((None, 'field_type'), None) |
332 |
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dbFieldType = self.aLayer.GetFieldType(field) |
333 |
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|
334 |
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if fieldType != dbFieldType: |
335 |
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raise ValueError(_("xml field type differs from database!")) |
336 |
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|
337 |
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# setup conversion routines depending on the kind of data |
338 |
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# we will be seeing later on |
339 |
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if fieldType == FIELDTYPE_STRING: |
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self.conv = str |
341 |
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elif fieldType == FIELDTYPE_INT: |
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self.conv = lambda p: int(float(p)) |
343 |
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elif fieldType == FIELDTYPE_DOUBLE: |
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self.conv = float |
345 |
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|
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self.aLayer.GetClassification().SetField(field) |
347 |
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|
348 |
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def end_classification(self, name, qname): |
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pass |
350 |
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|
351 |
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def start_clnull(self, name, qname, attrs): |
352 |
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self.cl_group = ClassGroupDefault() |
353 |
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self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), ""))) |
354 |
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self.cl_prop = ClassGroupProperties() |
355 |
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|
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def end_clnull(self, name, qname): |
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self.cl_group.SetProperties(self.cl_prop) |
358 |
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self.aLayer.GetClassification().SetDefaultGroup(self.cl_group) |
359 |
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del self.cl_group, self.cl_prop |
360 |
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|
361 |
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def start_clpoint(self, name, qname, attrs): |
362 |
|
attrib_value = attrs.get((None, 'value'), "0") |
363 |
|
|
364 |
|
value = self.conv(attrib_value) |
365 |
|
|
366 |
|
self.cl_group = ClassGroupSingleton(value) |
367 |
|
self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), ""))) |
368 |
|
self.cl_prop = ClassGroupProperties() |
369 |
|
|
370 |
|
|
371 |
|
def end_clpoint(self, name, qname): |
372 |
|
self.cl_group.SetProperties(self.cl_prop) |
373 |
|
self.aLayer.GetClassification().AppendGroup(self.cl_group) |
374 |
|
del self.cl_group, self.cl_prop |
375 |
|
|
376 |
|
def start_clrange(self, name, qname, attrs): |
377 |
|
|
378 |
|
range = attrs.get((None, 'range'), None) |
379 |
|
# for backward compatibility (min/max are not saved) |
380 |
|
min = attrs.get((None, 'min'), None) |
381 |
|
max = attrs.get((None, 'max'), None) |
382 |
|
|
383 |
|
try: |
384 |
|
if range is not None: |
385 |
|
self.cl_group = ClassGroupRange(Range(range)) |
386 |
|
elif min is not None and max is not None: |
387 |
|
self.cl_group = ClassGroupRange(self.conv(min), self.conv(max)) |
388 |
|
else: |
389 |
|
self.cl_group = ClassGroupRange(Range(None)) |
390 |
|
|
391 |
|
except ValueError: |
392 |
|
raise ValueError(_("Classification range is not a number!")) |
393 |
|
|
394 |
|
self.cl_group.SetLabel(attrs.get((None, 'label'), "")) |
395 |
|
self.cl_prop = ClassGroupProperties() |
396 |
|
|
397 |
|
|
398 |
|
def end_clrange(self, name, qname): |
399 |
|
self.cl_group.SetProperties(self.cl_prop) |
400 |
|
self.aLayer.GetClassification().AppendGroup(self.cl_group) |
401 |
|
del self.cl_group, self.cl_prop |
402 |
|
|
403 |
|
def start_cldata(self, name, qname, attrs): |
404 |
|
self.cl_prop.SetLineColor( |
405 |
|
parse_color(attrs.get((None, 'stroke'), "None"))) |
406 |
|
self.cl_prop.SetLineWidth( |
407 |
|
int(attrs.get((None, 'stroke_width'), "0"))) |
408 |
|
self.cl_prop.SetFill(parse_color(attrs.get((None, 'fill'), "None"))) |
409 |
|
|
410 |
|
def end_cldata(self, name, qname): |
411 |
|
pass |
412 |
|
|
413 |
|
def start_labellayer(self, name, qname, attrs): |
414 |
|
self.aLayer = self.aMap.LabelLayer() |
415 |
|
|
416 |
|
def start_label(self, name, qname, attrs): |
417 |
|
x = float(attrs[(None, 'x')]) |
418 |
|
y = float(attrs[(None, 'y')]) |
419 |
|
text = self.encode(attrs[(None, 'text')]) |
420 |
|
halign = attrs[(None, 'halign')] |
421 |
|
valign = attrs[(None, 'valign')] |
422 |
|
self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign) |
423 |
|
|
424 |
|
def characters(self, chars): |
425 |
|
pass |
426 |
|
|
427 |
|
|
428 |
def load_session(filename): |
def load_session(filename): |
429 |
"""Load a Thuban session from the file object file""" |
"""Load a Thuban session from the file object file""" |
430 |
dir = os.path.dirname(filename) |
|
431 |
file = open(filename) |
handler = SessionLoader() |
432 |
handler = ProcessSession(dir) |
handler.read(filename) |
433 |
|
|
|
if oldPython: |
|
|
parser = make_parser() |
|
|
parser.setDocumentHandler(handler) |
|
|
parser.setErrorHandler(saxutils.ErrorPrinter()) |
|
|
parser.parseFile(file) |
|
|
parser.close() |
|
|
else: |
|
|
xml.sax.parse(file,handler) |
|
434 |
session = handler.theSession |
session = handler.theSession |
435 |
# Newly loaded session aren't modified |
# Newly loaded session aren't modified |
436 |
session.UnsetModified() |
session.UnsetModified() |
437 |
|
|
438 |
return session |
return session |
439 |
|
|
|
if __name__ == "__main__": |
|
|
# find out the command to run |
|
|
if len(sys.argv) > 1: |
|
|
print "usage: cat <file> | " + sys.argv[0] |
|
|
else: |
|
|
parseSession(sys.stdin) |
|