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	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	jonathan	930	from Thuban.Model.layer import Layer, RasterLayer
30	bh	6	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	jonathan	930	'rasterlayer' : ("start_rasterlayer", "end_rasterlayer"),
196	jonathan	706	'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	bh	267	def start_session(self, name, qname, attrs):
206	jonathan	874	self.theSession = Session(self.encode(attrs.get((None, 'title'), None)))
207	bh	6
208	bh	267	def end_session(self, name, qname):
209			pass
210	bh	6
211	bh	267	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	jonathan	874	self.aMap = None
218	bh	267
219			def start_projection(self, name, qname, attrs):
220	jonathan	874	self.ProjectionName = self.encode(attrs.get((None, 'name'), None))
221	bh	267	self.ProjectionParams = [ ]
222
223			def end_projection(self, name, qname):
224	jonathan	874	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	jonathan	744	Projection(self.ProjectionParams, self.ProjectionName))
234	bh	267
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	jonathan	874	title = self.encode(attrs.get((None, 'title'), ""))
248	bh	267	filename = attrs.get((None, 'filename'), "")
249	jonathan	694	filename = os.path.join(self.GetDirectory(), filename)
250	jonathan	930	filename = self.encode(filename)
251			visible = self.encode(attrs.get((None, 'visible'), "true")) != "false"
252	bh	267	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	bh	723	self.aLayer = layer_class(title,
256			self.theSession.OpenShapefile(filename),
257			fill = fill, stroke = stroke,
258	jonathan	772	lineWidth = stroke_width,
259	jonathan	930	visible = visible)
260	bh	267
261			def end_layer(self, name, qname):
262			self.aMap.AddLayer(self.aLayer)
263	jonathan	874	self.aLayer = None
264	bh	267
265	jonathan	930	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	jonathan	365	def start_classification(self, name, qname, attrs):
279	jonathan	465	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	jonathan	365	def end_classification(self, name, qname):
299			pass
300
301			def start_clnull(self, name, qname, attrs):
302	jonathan	439	self.cl_group = ClassGroupDefault()
303	jonathan	874	self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
304	jonathan	439	self.cl_prop = ClassGroupProperties()
305	jonathan	365
306			def end_clnull(self, name, qname):
307	jonathan	439	self.cl_group.SetProperties(self.cl_prop)
308			self.aLayer.GetClassification().SetDefaultGroup(self.cl_group)
309			del self.cl_group, self.cl_prop
310	jonathan	365
311			def start_clpoint(self, name, qname, attrs):
312			attrib_value = attrs.get((None, 'value'), "0")
313
314	jonathan	465	value = self.conv(attrib_value)
315
316	jonathan	439	self.cl_group = ClassGroupSingleton(value)
317	jonathan	874	self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
318	jonathan	439	self.cl_prop = ClassGroupProperties()
319	jonathan	413
320	jonathan	365
321			def end_clpoint(self, name, qname):
322	jonathan	439	self.cl_group.SetProperties(self.cl_prop)
323	jonathan	614	self.aLayer.GetClassification().AppendGroup(self.cl_group)
324	jonathan	439	del self.cl_group, self.cl_prop
325	jonathan	365
326			def start_clrange(self, name, qname, attrs):
327
328	jonathan	874	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	jonathan	365	try:
334	jonathan	874	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	jonathan	365	except ValueError:
342	jan	374	raise ValueError(_("Classification range is not a number!"))
343	jonathan	365
344	jonathan	439	self.cl_group.SetLabel(attrs.get((None, 'label'), ""))
345			self.cl_prop = ClassGroupProperties()
346	jonathan	413
347	jonathan	365
348			def end_clrange(self, name, qname):
349	jonathan	439	self.cl_group.SetProperties(self.cl_prop)
350	jonathan	614	self.aLayer.GetClassification().AppendGroup(self.cl_group)
351	jonathan	439	del self.cl_group, self.cl_prop
352	jonathan	365
353			def start_cldata(self, name, qname, attrs):
354	jonathan	465	self.cl_prop.SetLineColor(
355			parse_color(attrs.get((None, 'stroke'), "None")))
356			self.cl_prop.SetLineWidth(
357	jonathan	390	int(attrs.get((None, 'stroke_width'), "0")))
358	jonathan	439	self.cl_prop.SetFill(parse_color(attrs.get((None, 'fill'), "None")))
359	jonathan	365
360			def end_cldata(self, name, qname):
361			pass
362
363	bh	267	def start_table(self, name, qname, attrs):
364	jonathan	493	#print "table title: %s" % attrs.get('title', None)
365			pass
366	bh	267
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	jonathan	874	text = self.encode(attrs[(None, 'text')])
377	bh	267	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	jonathan	694	def load_session(filename):
386			"""Load a Thuban session from the file object file"""
387
388	jonathan	706	handler = SessionLoader()
389			handler.read(filename)
390	jonathan	694
391	bh	6	session = handler.theSession
392			# Newly loaded session aren't modified
393			session.UnsetModified()
394
395			return session
396
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