/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/load.py
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revision 737 by jonathan, Fri Apr 25 09:12:17 2003 UTC revision 1159 by jonathan, Thu Jun 12 12:40:27 2003 UTC
# Line 20  import xml.sax.handler Line 20  import xml.sax.handler
20  from xml.sax import make_parser, ErrorHandler, SAXNotRecognizedException  from xml.sax import make_parser, ErrorHandler, SAXNotRecognizedException
21    
22  from Thuban import _  from Thuban import _
 from Thuban.common import *  
23    
24  from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \  from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \
25       FIELDTYPE_STRING       FIELDTYPE_STRING
26    
27  from Thuban.Model.session import Session  from Thuban.Model.session import Session
28  from Thuban.Model.map import Map  from Thuban.Model.map import Map
29  from Thuban.Model.layer import Layer  from Thuban.Model.layer import Layer, RasterLayer
30  from Thuban.Model.color import Color  from Thuban.Model.color import Color
31  from Thuban.Model.proj import Projection  from Thuban.Model.proj import Projection
32    from Thuban.Model.range import Range
33  from Thuban.Model.classification import Classification, \  from Thuban.Model.classification import Classification, \
34      ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap, \      ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap, \
35      ClassGroupProperties      ClassGroupProperties
36    
37    from Thuban.Model.xmlreader import XMLReader
38    import resource
39    
40  def parse_color(color):  def parse_color(color):
41      """Return the color object for the string color.      """Return the color object for the string color.
# Line 57  def parse_color(color): Line 59  def parse_color(color):
59          raise ValueError(_("Invalid color specification %s") % color)          raise ValueError(_("Invalid color specification %s") % color)
60      return result      return result
61    
   
 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.__parser = None  
         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)  
   
         if self.__parser is None:  
             self.__parser = make_parser()  
             self.__parser.setContentHandler(self)  
             self.__parser.setErrorHandler(ErrorHandler())  
             self.__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:  
                 self.__parser.setFeature(xml.sax.handler.feature_validation,0)  
                 self.__parser.setFeature(xml.sax.handler.feature_external_ges,0)  
                 self.__parser.setFeature(xml.sax.handler.feature_external_pes,0)  
             except SAXNotRecognizedException:  
                 pass  
   
         self.__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)  
   
62  class SessionLoader(XMLReader):  class SessionLoader(XMLReader):
63    
64      def __init__(self):      def __init__(self):
# Line 183  class SessionLoader(XMLReader): Line 75  class SessionLoader(XMLReader):
75               'projection'    : ("start_projection",     "end_projection"),               'projection'    : ("start_projection",     "end_projection"),
76               'parameter'     : ("start_parameter",      None),               'parameter'     : ("start_parameter",      None),
77               'layer'         : ("start_layer",          "end_layer"),               'layer'         : ("start_layer",          "end_layer"),
78                 'rasterlayer'   : ("start_rasterlayer",    "end_rasterlayer"),
79               'classification': ("start_classification", "end_classification"),               'classification': ("start_classification", "end_classification"),
80               'clnull'        : ("start_clnull",         "end_clnull"),               'clnull'        : ("start_clnull",         "end_clnull"),
81               'clpoint'       : ("start_clpoint",        "end_clpoint"),               'clpoint'       : ("start_clpoint",        "end_clpoint"),
# Line 193  class SessionLoader(XMLReader): Line 86  class SessionLoader(XMLReader):
86               'label'         : ("start_label",          None)})               'label'         : ("start_label",          None)})
87    
88      def start_session(self, name, qname, attrs):      def start_session(self, name, qname, attrs):
89          self.theSession = Session(attrs.get((None, 'title'), None))          self.theSession = Session(self.encode(attrs.get((None, 'title'), None)))
90    
91      def end_session(self, name, qname):      def end_session(self, name, qname):
92          pass          pass
# Line 201  class SessionLoader(XMLReader): Line 94  class SessionLoader(XMLReader):
94      def start_map(self, name, qname, attrs):      def start_map(self, name, qname, attrs):
95          """Start a map."""          """Start a map."""
96          self.aMap = Map(attrs.get((None, 'title'), None))          self.aMap = Map(attrs.get((None, 'title'), None))
         self.__projReceiver = self.aMap  
97    
98      def end_map(self, name, qname):      def end_map(self, name, qname):
99          self.theSession.AddMap(self.aMap)          self.theSession.AddMap(self.aMap)
100          self.__projReceiver = None          self.aMap = None
101    
102      def start_projection(self, name, qname, attrs):      def start_projection(self, name, qname, attrs):
103            self.ProjectionName = self.encode(attrs.get((None, 'name'), None))
104          self.ProjectionParams = [ ]          self.ProjectionParams = [ ]
105    
106      def end_projection(self, name, qname):      def end_projection(self, name, qname):
107          self.__projReceiver.SetProjection(Projection(self.ProjectionParams))          if self.aLayer is not None:
108                obj = self.aLayer
109            elif self.aMap is not None:
110                obj = self.aMap
111            else:
112                assert False, "projection tag out of context"
113                pass
114    
115            obj.SetProjection(
116                Projection(self.ProjectionParams, self.ProjectionName))
117    
118      def start_parameter(self, name, qname, attrs):      def start_parameter(self, name, qname, attrs):
119          s = attrs.get((None, 'value'))          s = attrs.get((None, 'value'))
# Line 225  class SessionLoader(XMLReader): Line 127  class SessionLoader(XMLReader):
127          attrs which may be a dictionary as well as the normal SAX attrs          attrs which may be a dictionary as well as the normal SAX attrs
128          object and bind it to self.aLayer.          object and bind it to self.aLayer.
129          """          """
130          title = attrs.get((None, 'title'), "")          title = self.encode(attrs.get((None, 'title'), ""))
131          filename = attrs.get((None, 'filename'), "")          filename = attrs.get((None, 'filename'), "")
132          filename = os.path.join(self.GetDirectory(), filename)          filename = os.path.join(self.GetDirectory(), filename)
133            filename = self.encode(filename)
134            visible  = self.encode(attrs.get((None, 'visible'), "true")) != "false"
135          fill = parse_color(attrs.get((None, 'fill'), "None"))          fill = parse_color(attrs.get((None, 'fill'), "None"))
136          stroke = parse_color(attrs.get((None, 'stroke'), "#000000"))          stroke = parse_color(attrs.get((None, 'stroke'), "#000000"))
137          stroke_width = int(attrs.get((None, 'stroke_width'), "1"))          stroke_width = int(attrs.get((None, 'stroke_width'), "1"))
138          self.aLayer = layer_class(title,          self.aLayer = layer_class(title,
139                                    self.theSession.OpenShapefile(filename),                                    self.theSession.OpenShapefile(filename),
140                                    fill = fill, stroke = stroke,                                    fill = fill, stroke = stroke,
141                                    lineWidth = stroke_width)                                    lineWidth = stroke_width,
142                                      visible = visible)
         self.__projReceiver = self.aLayer  
143    
144      def end_layer(self, name, qname):      def end_layer(self, name, qname):
145          self.aMap.AddLayer(self.aLayer)          self.aMap.AddLayer(self.aLayer)
146          self.__projReceiver = None          self.aLayer = None
147    
148        def start_rasterlayer(self, name, qname, attrs, layer_class = RasterLayer):
149            title = self.encode(attrs.get((None, 'title'), ""))
150            filename = attrs.get((None, 'filename'), "")
151            filename = os.path.join(self.GetDirectory(), filename)
152            filename = self.encode(filename)
153            visible  = self.encode(attrs.get((None, 'visible'), "true")) != "false"
154    
155            self.aLayer = layer_class(title, filename, visible = visible)
156    
157        def end_rasterlayer(self, name, qname):
158            self.aMap.AddLayer(self.aLayer)
159            self.aLayer = None
160    
161      def start_classification(self, name, qname, attrs):      def start_classification(self, name, qname, attrs):
162          field = attrs.get((None, 'field'), None)          field = attrs.get((None, 'field'), None)
# Line 262  class SessionLoader(XMLReader): Line 178  class SessionLoader(XMLReader):
178    
179          self.aLayer.GetClassification().SetField(field)          self.aLayer.GetClassification().SetField(field)
180    
   
181      def end_classification(self, name, qname):      def end_classification(self, name, qname):
182          pass          pass
183    
184      def start_clnull(self, name, qname, attrs):      def start_clnull(self, name, qname, attrs):
185          self.cl_group = ClassGroupDefault()          self.cl_group = ClassGroupDefault()
186          self.cl_group.SetLabel(attrs.get((None, 'label'), ""))          self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
187          self.cl_prop = ClassGroupProperties()          self.cl_prop = ClassGroupProperties()
188    
189      def end_clnull(self, name, qname):      def end_clnull(self, name, qname):
# Line 279  class SessionLoader(XMLReader): Line 194  class SessionLoader(XMLReader):
194      def start_clpoint(self, name, qname, attrs):      def start_clpoint(self, name, qname, attrs):
195          attrib_value = attrs.get((None, 'value'), "0")          attrib_value = attrs.get((None, 'value'), "0")
196    
         #try:  
             #value  = Str2Num(attrib_value)  
         #except:  
             #value  = attrib_value  
   
197          value = self.conv(attrib_value)          value = self.conv(attrib_value)
198    
199          self.cl_group = ClassGroupSingleton(value)          self.cl_group = ClassGroupSingleton(value)
200          self.cl_group.SetLabel(attrs.get((None, 'label'), ""))          self.cl_group.SetLabel(self.encode(attrs.get((None, 'label'), "")))
201          self.cl_prop = ClassGroupProperties()          self.cl_prop = ClassGroupProperties()
202    
203    
# Line 298  class SessionLoader(XMLReader): Line 208  class SessionLoader(XMLReader):
208    
209      def start_clrange(self, name, qname, attrs):      def start_clrange(self, name, qname, attrs):
210    
211            range = attrs.get((None, 'range'), None)
212            # for backward compatibility (min/max are not saved)
213            min   = attrs.get((None, 'min'), None)
214            max   = attrs.get((None, 'max'), None)
215    
216          try:          try:
217              min = self.conv(attrs.get((None, 'min'), "0"))              if range is not None:
218              max = self.conv(attrs.get((None, 'max'), "0"))                  self.cl_group = ClassGroupRange(Range(range))
219              #min = Str2Num(attrs.get((None, 'min'), "0"))              elif min is not None and max is not None:
220              #max = Str2Num(attrs.get((None, 'max'), "0"))                  self.cl_group = ClassGroupRange(self.conv(min), self.conv(max))
221                else:
222                    self.cl_group = ClassGroupRange(Range(None))
223    
224          except ValueError:          except ValueError:
225              raise ValueError(_("Classification range is not a number!"))              raise ValueError(_("Classification range is not a number!"))
226    
         self.cl_group = ClassGroupRange(min, max)  
227          self.cl_group.SetLabel(attrs.get((None, 'label'), ""))          self.cl_group.SetLabel(attrs.get((None, 'label'), ""))
228          self.cl_prop = ClassGroupProperties()          self.cl_prop = ClassGroupProperties()
229    
# Line 339  class SessionLoader(XMLReader): Line 256  class SessionLoader(XMLReader):
256      def start_label(self, name, qname, attrs):      def start_label(self, name, qname, attrs):
257          x = float(attrs[(None, 'x')])          x = float(attrs[(None, 'x')])
258          y = float(attrs[(None, 'y')])          y = float(attrs[(None, 'y')])
259          text = attrs[(None, 'text')]          text = self.encode(attrs[(None, 'text')])
260          halign = attrs[(None, 'halign')]          halign = attrs[(None, 'halign')]
261          valign = attrs[(None, 'valign')]          valign = attrs[(None, 'valign')]
262          self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign)          self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign)
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