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, RasterLayer
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"),
             'rasterlayer'   : ("start_rasterlayer",    "end_rasterlayer"),
             '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)
        filename = self.encode(filename)
        visible  = self.encode(attrs.get((None, 'visible'), "true")) != "false"
        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)

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

    def start_rasterlayer(self, name, qname, attrs, layer_class = RasterLayer):
        title = self.encode(attrs.get((None, 'title'), ""))
        filename = attrs.get((None, 'filename'), "")
        filename = os.path.join(self.GetDirectory(), filename)
        filename = self.encode(filename)
        visible  = self.encode(attrs.get((None, 'visible'), "true")) != "false"

        self.aLayer = layer_class(title, filename, visible = visible)

    def end_rasterlayer(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	# Copyright (C) 2001, 2002, 2003 by Intevation GmbH
2	# Authors:
3	# Jan-Oliver Wagner <[email protected]>
4	# Bernhard Herzog <[email protected]>
5	# Jonathan Coles <[email protected]>
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	import string, os
17
18	import xml.sax
19	import xml.sax.handler
20	from xml.sax import make_parser, ErrorHandler, SAXNotRecognizedException
21
22	from Thuban import _
23
24	from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \
25	FIELDTYPE_STRING
26
27	from Thuban.Model.session import Session
28	from Thuban.Model.map import Map
29	from Thuban.Model.layer import Layer, RasterLayer
30	from Thuban.Model.color import Color
31	from Thuban.Model.proj import Projection
32	from Thuban.Model.range import Range
33	from Thuban.Model.classification import Classification, \
34	ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap, \
35	ClassGroupProperties
36
37
38	def parse_color(color):
39	"""Return the color object for the string color.
40
41	Color may be either 'None' or of the form '#RRGGBB' in the usual
42	HTML color notation
43	"""
44	color = string.strip(color)
45	if color == "None":
46	result = Color.Transparent
47	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	raise ValueError(_("Invalid hexadecimal color specification %s")
55	% color)
56	else:
57	raise ValueError(_("Invalid color specification %s") % color)
58	return result
59
60
61	class XMLReader(xml.sax.handler.ContentHandler):
62
63	# Dictionary mapping element names (or (URI, element name) pairs for
64	# documents using namespaces) to method names. The methods should
65	# 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	def __init__(self):
78	self.chars = ''
79	self.__directory = ""
80	self.__dispatchers = {}
81
82	def read(self, file_or_filename):
83
84	if hasattr(file_or_filename, "read"):
85	# 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	parser = make_parser()
94	parser.setContentHandler(self)
95	parser.setErrorHandler(ErrorHandler())
96	parser.setFeature(xml.sax.handler.feature_namespaces, 1)
97
98	#
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
116	parser.parse(self.__file)
117
118	self.close()
119
120	def close(self):
121	self.__file.close()
122
123	def GetFilename(self):
124	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	"""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	self.__dispatchers.update(dict)
145
146	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	method_name = self.__dispatchers.get(name[1])
151	else:
152	# Dispatch with namespace
153	method_name = self.__dispatchers.get(name)
154	if method_name is not None and method_name[0] is not None:
155	getattr(self, method_name[0])(name, qname, attrs)
156
157	def endElementNS(self, name, qname):
158	"""Call the method given for name in self.end_dispatcher
159	"""
160	if name[0] is None:
161	method_name = self.__dispatchers.get(name[1])
162	else:
163	# Dispatch with namespace
164	method_name = self.__dispatchers.get(name)
165	if method_name is not None and method_name[1] is not None:
166	getattr(self, method_name[1])(name, qname)
167
168	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	class SessionLoader(XMLReader):
180
181	def __init__(self):
182	"""Inititialize the Sax handler."""
183	XMLReader.__init__(self)
184
185	self.theSession = None
186	self.aMap = None
187	self.aLayer = None
188
189	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	'rasterlayer' : ("start_rasterlayer", "end_rasterlayer"),
196	'classification': ("start_classification", "end_classification"),
197	'clnull' : ("start_clnull", "end_clnull"),
198	'clpoint' : ("start_clpoint", "end_clpoint"),
199	'clrange' : ("start_clrange", "end_clrange"),
200	'cldata' : ("start_cldata", "end_cldata"),
201	'table' : ("start_table", "end_table"),
202	'labellayer' : ("start_labellayer", None),
203	'label' : ("start_label", None)})
204
205	def start_session(self, name, qname, attrs):
206	self.theSession = Session(self.encode(attrs.get((None, 'title'), None)))
207
208	def end_session(self, name, qname):
209	pass
210
211	def start_map(self, name, qname, attrs):
212	"""Start a map."""
213	self.aMap = Map(attrs.get((None, 'title'), None))
214
215	def end_map(self, name, qname):
216	self.theSession.AddMap(self.aMap)
217	self.aMap = None
218
219	def start_projection(self, name, qname, attrs):
220	self.ProjectionName = self.encode(attrs.get((None, 'name'), None))
221	self.ProjectionParams = [ ]
222
223	def end_projection(self, name, qname):
224	if self.aLayer is not None:
225	obj = self.aLayer
226	elif self.aMap is not None:
227	obj = self.aMap
228	else:
229	assert False, "projection tag out of context"
230	pass
231
232	obj.SetProjection(
233	Projection(self.ProjectionParams, self.ProjectionName))
234
235	def start_parameter(self, name, qname, attrs):
236	s = attrs.get((None, 'value'))
237	s = str(s) # we can't handle unicode in proj
238	self.ProjectionParams.append(s)
239
240	def start_layer(self, name, qname, attrs, layer_class = Layer):
241	"""Start a layer
242
243	Instantiate a layer of class layer_class from the attributes in
244	attrs which may be a dictionary as well as the normal SAX attrs
245	object and bind it to self.aLayer.
246	"""
247	title = self.encode(attrs.get((None, 'title'), ""))
248	filename = attrs.get((None, 'filename'), "")
249	filename = os.path.join(self.GetDirectory(), filename)
250	filename = self.encode(filename)
251	visible = self.encode(attrs.get((None, 'visible'), "true")) != "false"
252	fill = parse_color(attrs.get((None, 'fill'), "None"))
253	stroke = parse_color(attrs.get((None, 'stroke'), "#000000"))
254	stroke_width = int(attrs.get((None, 'stroke_width'), "1"))
255	self.aLayer = layer_class(title,
256	self.theSession.OpenShapefile(filename),
257	fill = fill, stroke = stroke,
258	lineWidth = stroke_width,
259	visible = visible)
260
261	def end_layer(self, name, qname):
262	self.aMap.AddLayer(self.aLayer)
263	self.aLayer = None
264
265	def start_rasterlayer(self, name, qname, attrs, layer_class = RasterLayer):
266	title = self.encode(attrs.get((None, 'title'), ""))
267	filename = attrs.get((None, 'filename'), "")
268	filename = os.path.join(self.GetDirectory(), filename)
269	filename = self.encode(filename)
270	visible = self.encode(attrs.get((None, 'visible'), "true")) != "false"
271
272	self.aLayer = layer_class(title, filename, visible = visible)
273
274	def end_rasterlayer(self, name, qname):
275	self.aMap.AddLayer(self.aLayer)
276	self.aLayer = None
277
278	def start_classification(self, name, qname, attrs):
279	field = attrs.get((None, 'field'), None)
280
281	fieldType = attrs.get((None, 'field_type'), None)
282	dbFieldType = self.aLayer.GetFieldType(field)
283
284	if fieldType != dbFieldType:
285	raise ValueError(_("xml field type differs from database!"))
286
287	# setup conversion routines depending on the kind of data
288	# we will be seeing later on
289	if fieldType == FIELDTYPE_STRING:
290	self.conv = str
291	elif fieldType == FIELDTYPE_INT:
292	self.conv = lambda p: int(float(p))
293	elif fieldType == FIELDTYPE_DOUBLE:
294	self.conv = float
295
296	self.aLayer.GetClassification().SetField(field)
297
298	def end_classification(self, name, qname):
299	pass
300
301	def start_clnull(self, name, qname, attrs):
302	self.cl_group = ClassGroupDefault()
303	self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
304	self.cl_prop = ClassGroupProperties()
305
306	def end_clnull(self, name, qname):
307	self.cl_group.SetProperties(self.cl_prop)
308	self.aLayer.GetClassification().SetDefaultGroup(self.cl_group)
309	del self.cl_group, self.cl_prop
310
311	def start_clpoint(self, name, qname, attrs):
312	attrib_value = attrs.get((None, 'value'), "0")
313
314	value = self.conv(attrib_value)
315
316	self.cl_group = ClassGroupSingleton(value)
317	self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
318	self.cl_prop = ClassGroupProperties()
319
320
321	def end_clpoint(self, name, qname):
322	self.cl_group.SetProperties(self.cl_prop)
323	self.aLayer.GetClassification().AppendGroup(self.cl_group)
324	del self.cl_group, self.cl_prop
325
326	def start_clrange(self, name, qname, attrs):
327
328	range = attrs.get((None, 'range'), None)
329	# for backward compatibility (min/max are not saved)
330	min = attrs.get((None, 'min'), None)
331	max = attrs.get((None, 'max'), None)
332
333	try:
334	if range is not None:
335	self.cl_group = ClassGroupRange(Range(range))
336	elif min is not None and max is not None:
337	self.cl_group = ClassGroupRange(self.conv(min), self.conv(max))
338	else:
339	self.cl_group = ClassGroupRange(Range(None))
340
341	except ValueError:
342	raise ValueError(_("Classification range is not a number!"))
343
344	self.cl_group.SetLabel(attrs.get((None, 'label'), ""))
345	self.cl_prop = ClassGroupProperties()
346
347
348	def end_clrange(self, name, qname):
349	self.cl_group.SetProperties(self.cl_prop)
350	self.aLayer.GetClassification().AppendGroup(self.cl_group)
351	del self.cl_group, self.cl_prop
352
353	def start_cldata(self, name, qname, attrs):
354	self.cl_prop.SetLineColor(
355	parse_color(attrs.get((None, 'stroke'), "None")))
356	self.cl_prop.SetLineWidth(
357	int(attrs.get((None, 'stroke_width'), "0")))
358	self.cl_prop.SetFill(parse_color(attrs.get((None, 'fill'), "None")))
359
360	def end_cldata(self, name, qname):
361	pass
362
363	def start_table(self, name, qname, attrs):
364	#print "table title: %s" % attrs.get('title', None)
365	pass
366
367	def end_table(self, name, qname):
368	pass
369
370	def start_labellayer(self, name, qname, attrs):
371	self.aLayer = self.aMap.LabelLayer()
372
373	def start_label(self, name, qname, attrs):
374	x = float(attrs[(None, 'x')])
375	y = float(attrs[(None, 'y')])
376	text = self.encode(attrs[(None, 'text')])
377	halign = attrs[(None, 'halign')]
378	valign = attrs[(None, 'valign')]
379	self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign)
380
381	def characters(self, chars):
382	pass
383
384
385	def load_session(filename):
386	"""Load a Thuban session from the file object file"""
387
388	handler = SessionLoader()
389	handler.read(filename)
390
391	session = handler.theSession
392	# Newly loaded session aren't modified
393	session.UnsetModified()
394
395	return session
396
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svn:keywords	Author Date Id Revision