Thuban/Model/load.py

# Copyright (C) 2001, 2002, 2003 by Intevation GmbH
# Authors:
# Jan-Oliver Wagner <[email protected]>
# Bernhard Herzog <[email protected]>
# Jonathan Coles <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with GRASS for details.

"""
Parser for thuban session files.
"""

__version__ = "$Revision$"

import string, os

import xml.sax
import xml.sax.handler
from xml.sax import make_parser, ErrorHandler, SAXNotRecognizedException

from Thuban import _

from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \
     FIELDTYPE_STRING

from Thuban.Model.session import Session
from Thuban.Model.map import Map
from Thuban.Model.layer import Layer
from Thuban.Model.color import Color
from Thuban.Model.proj import Projection
from Thuban.Model.range import Range
from Thuban.Model.classification import Classification, \
    ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap, \
    ClassGroupProperties


def parse_color(color):
    """Return the color object for the string color.

    Color may be either 'None' or of the form '#RRGGBB' in the usual
    HTML color notation
    """
    color = string.strip(color)
    if color == "None":
        result = Color.Transparent
    elif color[0] == '#':
        if len(color) == 7:
            r = string.atoi(color[1:3], 16) / 255.0
            g = string.atoi(color[3:5], 16) / 255.0
            b = string.atoi(color[5:7], 16) / 255.0
            result = Color(r, g, b)
        else:
            raise ValueError(_("Invalid hexadecimal color specification %s")
                             % color)
    else:
        raise ValueError(_("Invalid color specification %s") % color)
    return result


class XMLReader(xml.sax.handler.ContentHandler):

    # Dictionary mapping element names (or (URI, element name) pairs for
    # documents using namespaces) to method names. The methods should
    # accept the same parameters as the startElement (or startElementNS)
    # methods. The start_dispatcher is used by the default startElement
    # and startElementNS methods to call a method for the open tag of an
    # element.
    start_dispatcher = {}

    # end_dispatcher works just like start_dispatcher but it's used by
    # endElement and endElementNS. The method whose names it maps to
    # should accept the same parameters as endElement and endElementNS.
    end_dispatcher = {}


    def __init__(self):
        self.chars = ''
        self.__directory = ""
        self.__dispatchers = {}

    def read(self, file_or_filename):

        if hasattr(file_or_filename, "read"):
            # it's a file object
            self.__directory = ""
            self.__file = file_or_filename
        else:
            filename = file_or_filename
            self.__directory = os.path.dirname(filename)
            self.__file = open(filename)

        parser = make_parser()
        parser.setContentHandler(self)
        parser.setErrorHandler(ErrorHandler())
        parser.setFeature(xml.sax.handler.feature_namespaces, 1)

        #
        # Well, this isn't pretty, but it appears that if you
        # use Python 2.2 without the site-package _xmlplus then
        # the following will fail, and without them it will work.
        # However, if you do have the site-package and you don't
        # call these functions, the reader raises an exception
        #
        # The reason we set these to 0 in the first place is 
        # because there is an unresolved issue with external
        # entities causing an exception in the reader
        #
        try:
            parser.setFeature(xml.sax.handler.feature_validation,0)
            parser.setFeature(xml.sax.handler.feature_external_ges,0)
            parser.setFeature(xml.sax.handler.feature_external_pes,0)
        except SAXNotRecognizedException:
            pass

        parser.parse(self.__file)

        self.close()

    def close(self):
        self.__file.close()
        
    def GetFilename(self):
        if hasattr(self.__file, "name"):
            return self.__file.name

        return ""

    def GetDirectory(self):
        return self.__directory


    def AddDispatchers(self, dict):
        """Add the function names that should be used to process XML tags.

        dict -- a dictionary whose keys are XML tag strings and whose values
                are pairs of strings such that the first string is
                the name of the function that should be called when the
                XML tag opens and the second string is the name of the
                function that should be called when the XML tag closes.
                If a pair element is None, no function is called.
        """

        self.__dispatchers.update(dict)

    def startElementNS(self, name, qname, attrs):
        """Call the method given for name in self.start_dispatcher
        """
        if name[0] is None:
            method_name = self.__dispatchers.get(name[1])
        else:
            # Dispatch with namespace
            method_name = self.__dispatchers.get(name)
        if method_name is not None and method_name[0] is not None:
            getattr(self, method_name[0])(name, qname, attrs)

    def endElementNS(self, name, qname):
        """Call the method given for name in self.end_dispatcher
        """
        if name[0] is None:
            method_name = self.__dispatchers.get(name[1])
        else:
            # Dispatch with namespace
            method_name = self.__dispatchers.get(name)
        if method_name is not None and method_name[1] is not None:
            getattr(self, method_name[1])(name, qname)

    def encode(self, str):
        """Assume that str is in Unicode and encode it into Latin1.
        
        If str is None, return None
        """

        if str is not None:
            return str.encode("latin1")
        else:
            return None

class SessionLoader(XMLReader):

    def __init__(self):
        """Inititialize the Sax handler."""
        XMLReader.__init__(self)

        self.theSession = None
        self.aMap = None
        self.aLayer = None

        XMLReader.AddDispatchers(self,
            {'session'       : ("start_session",        "end_session"),
             'map'           : ("start_map",            "end_map"),
             'projection'    : ("start_projection",     "end_projection"),
             'parameter'     : ("start_parameter",      None),
             'layer'         : ("start_layer",          "end_layer"),
             'classification': ("start_classification", "end_classification"),
             'clnull'        : ("start_clnull",         "end_clnull"),
             'clpoint'       : ("start_clpoint",        "end_clpoint"),
             'clrange'       : ("start_clrange",        "end_clrange"),
             'cldata'        : ("start_cldata",         "end_cldata"),
             'table'         : ("start_table",          "end_table"),
             'labellayer'    : ("start_labellayer",     None),
             'label'         : ("start_label",          None)})

    def start_session(self, name, qname, attrs):
        self.theSession = Session(self.encode(attrs.get((None, 'title'), None)))

    def end_session(self, name, qname):
        pass

    def start_map(self, name, qname, attrs):
        """Start a map."""
        self.aMap = Map(attrs.get((None, 'title'), None))

    def end_map(self, name, qname):
        self.theSession.AddMap(self.aMap)
        self.aMap = None

    def start_projection(self, name, qname, attrs):
        self.ProjectionName = self.encode(attrs.get((None, 'name'), None))
        self.ProjectionParams = [ ]

    def end_projection(self, name, qname):
        if self.aLayer is not None:
            obj = self.aLayer
        elif self.aMap is not None:
            obj = self.aMap
        else:
            assert False, "projection tag out of context"
            pass

        obj.SetProjection(
            Projection(self.ProjectionParams, self.ProjectionName))

    def start_parameter(self, name, qname, attrs):
        s = attrs.get((None, 'value'))
        s = str(s) # we can't handle unicode in proj
        self.ProjectionParams.append(s)

    def start_layer(self, name, qname, attrs, layer_class = Layer):
        """Start a layer

        Instantiate a layer of class layer_class from the attributes in
        attrs which may be a dictionary as well as the normal SAX attrs
        object and bind it to self.aLayer.
        """
        title = self.encode(attrs.get((None, 'title'), ""))
        filename = attrs.get((None, 'filename'), "")
        filename = os.path.join(self.GetDirectory(), filename)
        visible  = attrs.get((None, 'visible'), "true")
        fill = parse_color(attrs.get((None, 'fill'), "None"))
        stroke = parse_color(attrs.get((None, 'stroke'), "#000000"))
        stroke_width = int(attrs.get((None, 'stroke_width'), "1"))
        self.aLayer = layer_class(title,
                                  self.theSession.OpenShapefile(filename),
                                  fill = fill, stroke = stroke,
                                  lineWidth = stroke_width,
                                  visible = visible != "false")

    def end_layer(self, name, qname):
        self.aMap.AddLayer(self.aLayer)
        self.aLayer = None

    def start_classification(self, name, qname, attrs):
        field = attrs.get((None, 'field'), None)

        fieldType = attrs.get((None, 'field_type'), None)
        dbFieldType = self.aLayer.GetFieldType(field)

        if fieldType != dbFieldType:
            raise ValueError(_("xml field type differs from database!"))

        # setup conversion routines depending on the kind of data
        # we will be seeing later on
        if fieldType == FIELDTYPE_STRING:
            self.conv = str
        elif fieldType == FIELDTYPE_INT:
            self.conv = lambda p: int(float(p))
        elif fieldType == FIELDTYPE_DOUBLE:
            self.conv = float

        self.aLayer.GetClassification().SetField(field)

    def end_classification(self, name, qname): 
        pass

    def start_clnull(self, name, qname, attrs):
        self.cl_group = ClassGroupDefault()
        self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
        self.cl_prop = ClassGroupProperties()

    def end_clnull(self, name, qname):
        self.cl_group.SetProperties(self.cl_prop)
        self.aLayer.GetClassification().SetDefaultGroup(self.cl_group)
        del self.cl_group, self.cl_prop

    def start_clpoint(self, name, qname, attrs):
        attrib_value = attrs.get((None, 'value'), "0")

        value = self.conv(attrib_value)

        self.cl_group = ClassGroupSingleton(value)
        self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
        self.cl_prop = ClassGroupProperties()


    def end_clpoint(self, name, qname):
        self.cl_group.SetProperties(self.cl_prop)
        self.aLayer.GetClassification().AppendGroup(self.cl_group)
        del self.cl_group, self.cl_prop

    def start_clrange(self, name, qname, attrs):

        range = attrs.get((None, 'range'), None)
        # for backward compatibility (min/max are not saved)
        min   = attrs.get((None, 'min'), None)
        max   = attrs.get((None, 'max'), None)

        try:
            if range is not None:
                self.cl_group = ClassGroupRange(Range(range))
            elif min is not None and max is not None:
                self.cl_group = ClassGroupRange(self.conv(min), self.conv(max))
            else:
                self.cl_group = ClassGroupRange(Range(None))

        except ValueError:
            raise ValueError(_("Classification range is not a number!"))

        self.cl_group.SetLabel(attrs.get((None, 'label'), ""))
        self.cl_prop = ClassGroupProperties()


    def end_clrange(self, name, qname):
        self.cl_group.SetProperties(self.cl_prop)
        self.aLayer.GetClassification().AppendGroup(self.cl_group)
        del self.cl_group, self.cl_prop

    def start_cldata(self, name, qname, attrs):
        self.cl_prop.SetLineColor(
            parse_color(attrs.get((None, 'stroke'), "None")))
        self.cl_prop.SetLineWidth(
            int(attrs.get((None, 'stroke_width'), "0")))
        self.cl_prop.SetFill(parse_color(attrs.get((None, 'fill'), "None")))

    def end_cldata(self, name, qname):
        pass

    def start_table(self, name, qname, attrs):
        #print "table title: %s" % attrs.get('title', None)
        pass

    def end_table(self, name, qname):
        pass

    def start_labellayer(self, name, qname, attrs):
        self.aLayer = self.aMap.LabelLayer()

    def start_label(self, name, qname, attrs):
        x = float(attrs[(None, 'x')])
        y = float(attrs[(None, 'y')])
        text = self.encode(attrs[(None, 'text')])
        halign = attrs[(None, 'halign')]
        valign = attrs[(None, 'valign')]
        self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign)

    def characters(self, chars):
        pass


def load_session(filename):
    """Load a Thuban session from the file object file"""

    handler = SessionLoader()
    handler.read(filename)

    session = handler.theSession
    # Newly loaded session aren't modified
    session.UnsetModified()

    return session

1	bh	723	# Copyright (C) 2001, 2002, 2003 by Intevation GmbH
2	bh	6	# Authors:
3			# Jan-Oliver Wagner <[email protected]>
4	bh	267	# Bernhard Herzog <[email protected]>
5	jonathan	413	# Jonathan Coles <[email protected]>
6	bh	6	#
7			# This program is free software under the GPL (>=v2)
8			# Read the file COPYING coming with GRASS for details.
9
10			"""
11			Parser for thuban session files.
12			"""
13
14			__version__ = "$Revision$"
15
16	bh	723	import string, os
17	bh	267
18			import xml.sax
19			import xml.sax.handler
20	jonathan	526	from xml.sax import make_parser, ErrorHandler, SAXNotRecognizedException
21	bh	267
22	jan	374	from Thuban import _
23	jonathan	413
24	jonathan	473	from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \
25			FIELDTYPE_STRING
26
27	bh	6	from Thuban.Model.session import Session
28			from Thuban.Model.map import Map
29			from Thuban.Model.layer import Layer
30			from Thuban.Model.color import Color
31			from Thuban.Model.proj import Projection
32	jonathan	874	from Thuban.Model.range import Range
33	jonathan	413	from Thuban.Model.classification import Classification, \
34	jonathan	439	ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap, \
35			ClassGroupProperties
36	bh	6
37
38	bh	267	def parse_color(color):
39			"""Return the color object for the string color.
40	bh	6
41	bh	267	Color may be either 'None' or of the form '#RRGGBB' in the usual
42			HTML color notation
43	bh	6	"""
44			color = string.strip(color)
45			if color == "None":
46	jonathan	610	result = Color.Transparent
47	bh	6	elif color[0] == '#':
48			if len(color) == 7:
49			r = string.atoi(color[1:3], 16) / 255.0
50			g = string.atoi(color[3:5], 16) / 255.0
51			b = string.atoi(color[5:7], 16) / 255.0
52			result = Color(r, g, b)
53			else:
54	jan	374	raise ValueError(_("Invalid hexadecimal color specification %s")
55	bh	6	% color)
56			else:
57	jan	374	raise ValueError(_("Invalid color specification %s") % color)
58	bh	6	return result
59
60
61	jonathan	706	class XMLReader(xml.sax.handler.ContentHandler):
62	bh	6
63	bh	267	# Dictionary mapping element names (or (URI, element name) pairs for
64	jonathan	365	# documents using namespaces) to method names. The methods should
65	bh	267	# accept the same parameters as the startElement (or startElementNS)
66			# methods. The start_dispatcher is used by the default startElement
67			# and startElementNS methods to call a method for the open tag of an
68			# element.
69			start_dispatcher = {}
70
71			# end_dispatcher works just like start_dispatcher but it's used by
72			# endElement and endElementNS. The method whose names it maps to
73			# should accept the same parameters as endElement and endElementNS.
74			end_dispatcher = {}
75
76
77	jonathan	706	def __init__(self):
78	bh	6	self.chars = ''
79	jonathan	706	self.__directory = ""
80			self.__dispatchers = {}
81	bh	6
82	jonathan	706	def read(self, file_or_filename):
83
84	jonathan	722	if hasattr(file_or_filename, "read"):
85	jonathan	706	# it's a file object
86			self.__directory = ""
87			self.__file = file_or_filename
88			else:
89			filename = file_or_filename
90			self.__directory = os.path.dirname(filename)
91			self.__file = open(filename)
92
93	bh	763	parser = make_parser()
94			parser.setContentHandler(self)
95			parser.setErrorHandler(ErrorHandler())
96			parser.setFeature(xml.sax.handler.feature_namespaces, 1)
97	jonathan	706
98	bh	763	#
99			# Well, this isn't pretty, but it appears that if you
100			# use Python 2.2 without the site-package _xmlplus then
101			# the following will fail, and without them it will work.
102			# However, if you do have the site-package and you don't
103			# call these functions, the reader raises an exception
104			#
105			# The reason we set these to 0 in the first place is
106			# because there is an unresolved issue with external
107			# entities causing an exception in the reader
108			#
109			try:
110			parser.setFeature(xml.sax.handler.feature_validation,0)
111			parser.setFeature(xml.sax.handler.feature_external_ges,0)
112			parser.setFeature(xml.sax.handler.feature_external_pes,0)
113			except SAXNotRecognizedException:
114			pass
115	jonathan	706
116	bh	763	parser.parse(self.__file)
117	jonathan	706
118			self.close()
119
120			def close(self):
121			self.__file.close()
122
123	jonathan	737	def GetFilename(self):
124	jonathan	706	if hasattr(self.__file, "name"):
125			return self.__file.name
126
127			return ""
128
129			def GetDirectory(self):
130			return self.__directory
131
132
133			def AddDispatchers(self, dict):
134	jonathan	722	"""Add the function names that should be used to process XML tags.
135
136			dict -- a dictionary whose keys are XML tag strings and whose values
137			are pairs of strings such that the first string is
138			the name of the function that should be called when the
139			XML tag opens and the second string is the name of the
140			function that should be called when the XML tag closes.
141			If a pair element is None, no function is called.
142			"""
143
144	jonathan	706	self.__dispatchers.update(dict)
145
146	bh	267	def startElementNS(self, name, qname, attrs):
147			"""Call the method given for name in self.start_dispatcher
148			"""
149			if name[0] is None:
150	jonathan	706	method_name = self.__dispatchers.get(name[1])
151	bh	267	else:
152			# Dispatch with namespace
153	jonathan	706	method_name = self.__dispatchers.get(name)
154	jonathan	722	if method_name is not None and method_name[0] is not None:
155	jonathan	706	getattr(self, method_name[0])(name, qname, attrs)
156	bh	6
157	bh	267	def endElementNS(self, name, qname):
158			"""Call the method given for name in self.end_dispatcher
159			"""
160			if name[0] is None:
161	jonathan	706	method_name = self.__dispatchers.get(name[1])
162	bh	267	else:
163			# Dispatch with namespace
164	jonathan	706	method_name = self.__dispatchers.get(name)
165	jonathan	722	if method_name is not None and method_name[1] is not None:
166	jonathan	706	getattr(self, method_name[1])(name, qname)
167	bh	6
168	jonathan	874	def encode(self, str):
169			"""Assume that str is in Unicode and encode it into Latin1.
170
171			If str is None, return None
172			"""
173
174			if str is not None:
175			return str.encode("latin1")
176			else:
177			return None
178
179	jonathan	706	class SessionLoader(XMLReader):
180	jonathan	694
181	jonathan	706	def __init__(self):
182	jonathan	694	"""Inititialize the Sax handler."""
183	jonathan	706	XMLReader.__init__(self)
184	jonathan	694
185			self.theSession = None
186			self.aMap = None
187			self.aLayer = None
188
189	jonathan	706	XMLReader.AddDispatchers(self,
190			{'session' : ("start_session", "end_session"),
191			'map' : ("start_map", "end_map"),
192			'projection' : ("start_projection", "end_projection"),
193			'parameter' : ("start_parameter", None),
194			'layer' : ("start_layer", "end_layer"),
195			'classification': ("start_classification", "end_classification"),
196			'clnull' : ("start_clnull", "end_clnull"),
197			'clpoint' : ("start_clpoint", "end_clpoint"),
198			'clrange' : ("start_clrange", "end_clrange"),
199			'cldata' : ("start_cldata", "end_cldata"),
200			'table' : ("start_table", "end_table"),
201			'labellayer' : ("start_labellayer", None),
202			'label' : ("start_label", None)})
203
204	bh	267	def start_session(self, name, qname, attrs):
205	jonathan	874	self.theSession = Session(self.encode(attrs.get((None, 'title'), None)))
206	bh	6
207	bh	267	def end_session(self, name, qname):
208			pass
209	bh	6
210	bh	267	def start_map(self, name, qname, attrs):
211			"""Start a map."""
212			self.aMap = Map(attrs.get((None, 'title'), None))
213
214			def end_map(self, name, qname):
215			self.theSession.AddMap(self.aMap)
216	jonathan	874	self.aMap = None
217	bh	267
218			def start_projection(self, name, qname, attrs):
219	jonathan	874	self.ProjectionName = self.encode(attrs.get((None, 'name'), None))
220	bh	267	self.ProjectionParams = [ ]
221
222			def end_projection(self, name, qname):
223	jonathan	874	if self.aLayer is not None:
224			obj = self.aLayer
225			elif self.aMap is not None:
226			obj = self.aMap
227			else:
228			assert False, "projection tag out of context"
229			pass
230
231			obj.SetProjection(
232	jonathan	744	Projection(self.ProjectionParams, self.ProjectionName))
233	bh	267
234			def start_parameter(self, name, qname, attrs):
235			s = attrs.get((None, 'value'))
236			s = str(s) # we can't handle unicode in proj
237			self.ProjectionParams.append(s)
238
239			def start_layer(self, name, qname, attrs, layer_class = Layer):
240			"""Start a layer
241
242			Instantiate a layer of class layer_class from the attributes in
243			attrs which may be a dictionary as well as the normal SAX attrs
244			object and bind it to self.aLayer.
245			"""
246	jonathan	874	title = self.encode(attrs.get((None, 'title'), ""))
247	bh	267	filename = attrs.get((None, 'filename'), "")
248	jonathan	694	filename = os.path.join(self.GetDirectory(), filename)
249	jonathan	772	visible = attrs.get((None, 'visible'), "true")
250	bh	267	fill = parse_color(attrs.get((None, 'fill'), "None"))
251			stroke = parse_color(attrs.get((None, 'stroke'), "#000000"))
252			stroke_width = int(attrs.get((None, 'stroke_width'), "1"))
253	bh	723	self.aLayer = layer_class(title,
254			self.theSession.OpenShapefile(filename),
255			fill = fill, stroke = stroke,
256	jonathan	772	lineWidth = stroke_width,
257			visible = visible != "false")
258	bh	267
259			def end_layer(self, name, qname):
260			self.aMap.AddLayer(self.aLayer)
261	jonathan	874	self.aLayer = None
262	bh	267
263	jonathan	365	def start_classification(self, name, qname, attrs):
264	jonathan	465	field = attrs.get((None, 'field'), None)
265
266			fieldType = attrs.get((None, 'field_type'), None)
267			dbFieldType = self.aLayer.GetFieldType(field)
268
269			if fieldType != dbFieldType:
270			raise ValueError(_("xml field type differs from database!"))
271
272			# setup conversion routines depending on the kind of data
273			# we will be seeing later on
274			if fieldType == FIELDTYPE_STRING:
275			self.conv = str
276			elif fieldType == FIELDTYPE_INT:
277			self.conv = lambda p: int(float(p))
278			elif fieldType == FIELDTYPE_DOUBLE:
279			self.conv = float
280
281			self.aLayer.GetClassification().SetField(field)
282
283	jonathan	365	def end_classification(self, name, qname):
284			pass
285
286			def start_clnull(self, name, qname, attrs):
287	jonathan	439	self.cl_group = ClassGroupDefault()
288	jonathan	874	self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
289	jonathan	439	self.cl_prop = ClassGroupProperties()
290	jonathan	365
291			def end_clnull(self, name, qname):
292	jonathan	439	self.cl_group.SetProperties(self.cl_prop)
293			self.aLayer.GetClassification().SetDefaultGroup(self.cl_group)
294			del self.cl_group, self.cl_prop
295	jonathan	365
296			def start_clpoint(self, name, qname, attrs):
297			attrib_value = attrs.get((None, 'value'), "0")
298
299	jonathan	465	value = self.conv(attrib_value)
300
301	jonathan	439	self.cl_group = ClassGroupSingleton(value)
302	jonathan	874	self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
303	jonathan	439	self.cl_prop = ClassGroupProperties()
304	jonathan	413
305	jonathan	365
306			def end_clpoint(self, name, qname):
307	jonathan	439	self.cl_group.SetProperties(self.cl_prop)
308	jonathan	614	self.aLayer.GetClassification().AppendGroup(self.cl_group)
309	jonathan	439	del self.cl_group, self.cl_prop
310	jonathan	365
311			def start_clrange(self, name, qname, attrs):
312
313	jonathan	874	range = attrs.get((None, 'range'), None)
314			# for backward compatibility (min/max are not saved)
315			min = attrs.get((None, 'min'), None)
316			max = attrs.get((None, 'max'), None)
317
318	jonathan	365	try:
319	jonathan	874	if range is not None:
320			self.cl_group = ClassGroupRange(Range(range))
321			elif min is not None and max is not None:
322			self.cl_group = ClassGroupRange(self.conv(min), self.conv(max))
323			else:
324			self.cl_group = ClassGroupRange(Range(None))
325
326	jonathan	365	except ValueError:
327	jan	374	raise ValueError(_("Classification range is not a number!"))
328	jonathan	365
329	jonathan	439	self.cl_group.SetLabel(attrs.get((None, 'label'), ""))
330			self.cl_prop = ClassGroupProperties()
331	jonathan	413
332	jonathan	365
333			def end_clrange(self, name, qname):
334	jonathan	439	self.cl_group.SetProperties(self.cl_prop)
335	jonathan	614	self.aLayer.GetClassification().AppendGroup(self.cl_group)
336	jonathan	439	del self.cl_group, self.cl_prop
337	jonathan	365
338			def start_cldata(self, name, qname, attrs):
339	jonathan	465	self.cl_prop.SetLineColor(
340			parse_color(attrs.get((None, 'stroke'), "None")))
341			self.cl_prop.SetLineWidth(
342	jonathan	390	int(attrs.get((None, 'stroke_width'), "0")))
343	jonathan	439	self.cl_prop.SetFill(parse_color(attrs.get((None, 'fill'), "None")))
344	jonathan	365
345			def end_cldata(self, name, qname):
346			pass
347
348	bh	267	def start_table(self, name, qname, attrs):
349	jonathan	493	#print "table title: %s" % attrs.get('title', None)
350			pass
351	bh	267
352			def end_table(self, name, qname):
353			pass
354
355			def start_labellayer(self, name, qname, attrs):
356			self.aLayer = self.aMap.LabelLayer()
357
358			def start_label(self, name, qname, attrs):
359			x = float(attrs[(None, 'x')])
360			y = float(attrs[(None, 'y')])
361	jonathan	874	text = self.encode(attrs[(None, 'text')])
362	bh	267	halign = attrs[(None, 'halign')]
363			valign = attrs[(None, 'valign')]
364			self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign)
365
366			def characters(self, chars):
367			pass
368
369
370	jonathan	694	def load_session(filename):
371			"""Load a Thuban session from the file object file"""
372
373	jonathan	706	handler = SessionLoader()
374			handler.read(filename)
375	jonathan	694
376	bh	6	session = handler.theSession
377			# Newly loaded session aren't modified
378			session.UnsetModified()
379
380			return session
381
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