/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/load.py
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revision 1664 by bh, Wed Aug 27 15:20:54 2003 UTC revision 2036 by bh, Mon Dec 22 17:49:43 2003 UTC
# Line 142  class SessionLoader(XMLReader): Line 142  class SessionLoader(XMLReader):
142          # all dispatchers should be used for the 0.8 and 0.9 namespaces too          # all dispatchers should be used for the 0.8 and 0.9 namespaces too
143          for xmlns in ("http://thuban.intevation.org/dtds/thuban-0.8.dtd",          for xmlns in ("http://thuban.intevation.org/dtds/thuban-0.8.dtd",
144                        "http://thuban.intevation.org/dtds/thuban-0.9-dev.dtd",                        "http://thuban.intevation.org/dtds/thuban-0.9-dev.dtd",
145                        "http://thuban.intevation.org/dtds/thuban-0.9.dtd"):                        "http://thuban.intevation.org/dtds/thuban-0.9.dtd",
146                          "http://thuban.intevation.org/dtds/thuban-1.0-dev.dtd",
147                          "http://thuban.intevation.org/dtds/thuban-1.0rc1.dtd",
148                          "http://thuban.intevation.org/dtds/thuban-1.0.0.dtd"):
149              for key, value in dispatchers.items():              for key, value in dispatchers.items():
150                  dispatchers[(xmlns, key)] = value                  dispatchers[(xmlns, key)] = value
151    
152          XMLReader.AddDispatchers(self, dispatchers)          XMLReader.AddDispatchers(self, dispatchers)
153    
154        def Destroy(self):
155            """Clear all instance variables to cut cyclic references.
156    
157            The GC would have collected the loader eventually but it can
158            happen that it doesn't run at all until Thuban is closed (2.3
159            but not 2.2 tries a bit harder and forces a collection when the
160            interpreter terminates)
161            """
162            self.__dict__.clear()
163    
164      def start_session(self, name, qname, attrs):      def start_session(self, name, qname, attrs):
165          self.theSession = Session(self.encode(attrs.get((None, 'title'),          self.theSession = Session(self.encode(attrs.get((None, 'title'),
166                                                          None)))                                                          None)))
# Line 175  class SessionLoader(XMLReader): Line 188  class SessionLoader(XMLReader):
188          If the attribute has a default value and it is not present in          If the attribute has a default value and it is not present in
189          attrs, use that default value as the value in the returned dict.          attrs, use that default value as the value in the returned dict.
190    
191          If a conversion is specified, convert the value before putting          The value is converted before putting it into the returned dict.
192          it into the returned dict. The following conversions are          The following conversions are available:
         available:  
193    
194             'filename' -- The attribute is a filename.             'filename' -- The attribute is a filename.
195    
# Line 199  class SessionLoader(XMLReader): Line 211  class SessionLoader(XMLReader):
211    
212             'ascii' -- The attribute is converted to a bytestring with             'ascii' -- The attribute is converted to a bytestring with
213                        ascii encoding.                        ascii encoding.
214    
215               a callable -- The attribute value is passed to the callable
216                             and the return value is used as the converted
217                             value
218    
219            If no conversion is specified for an attribute it is converted
220            with self.encode.
221          """          """
222          normalized = {}          normalized = {}
223    
# Line 229  class SessionLoader(XMLReader): Line 248  class SessionLoader(XMLReader):
248                                                       value))                                                       value))
249              elif d.conversion == "ascii":              elif d.conversion == "ascii":
250                  value = value.encode("ascii")                  value = value.encode("ascii")
251                elif d.conversion:
252                    # Assume it's a callable
253                    value = d.conversion(value)
254              else:              else:
255                  if d.conversion:                 value = self.encode(value)
                     raise ValueError("Unknown attribute conversion %r"  
                                      % d.conversion)  
256    
257              normalized[d.name] = value              normalized[d.name] = value
258          return normalized          return normalized
# Line 364  class SessionLoader(XMLReader): Line 384  class SessionLoader(XMLReader):
384          self.aMap = None          self.aMap = None
385    
386      def start_projection(self, name, qname, attrs):      def start_projection(self, name, qname, attrs):
387          self.ProjectionName = self.encode(attrs.get((None, 'name'), None))          attrs = self.check_attrs(name, attrs,
388          self.ProjectionParams = [ ]                                   [AttrDesc("name", conversion=self.encode),
389                                      AttrDesc("epsg", default=None,
390                                               conversion=self.encode)])
391            self.projection_name = attrs["name"]
392            self.projection_epsg = attrs["epsg"]
393            self.projection_params = [ ]
394    
395      def end_projection(self, name, qname):      def end_projection(self, name, qname):
396          if self.aLayer is not None:          if self.aLayer is not None:
# Line 376  class SessionLoader(XMLReader): Line 401  class SessionLoader(XMLReader):
401              assert False, "projection tag out of context"              assert False, "projection tag out of context"
402              pass              pass
403    
404          obj.SetProjection(          obj.SetProjection(Projection(self.projection_params,
405              Projection(self.ProjectionParams, self.ProjectionName))                                       self.projection_name,
406                                         epsg = self.projection_epsg))
407    
408      def start_parameter(self, name, qname, attrs):      def start_parameter(self, name, qname, attrs):
409          s = attrs.get((None, 'value'))          s = attrs.get((None, 'value'))
410          s = str(s) # we can't handle unicode in proj          s = str(s) # we can't handle unicode in proj
411          self.ProjectionParams.append(s)          self.projection_params.append(s)
412    
413      def start_layer(self, name, qname, attrs, layer_class = Layer):      def start_layer(self, name, qname, attrs, layer_class = Layer):
414          """Start a layer          """Start a layer
# Line 426  class SessionLoader(XMLReader): Line 452  class SessionLoader(XMLReader):
452          self.aLayer = None          self.aLayer = None
453    
454      def start_classification(self, name, qname, attrs):      def start_classification(self, name, qname, attrs):
455          field = attrs.get((None, 'field'), None)          attrs = self.check_attrs(name, attrs,
456                                     [AttrDesc("field", True),
457                                      AttrDesc("field_type", True)])
458            field = attrs["field"]
459            fieldType = attrs["field_type"]
460    
         fieldType = attrs.get((None, 'field_type'), None)  
461          dbFieldType = self.aLayer.GetFieldType(field)          dbFieldType = self.aLayer.GetFieldType(field)
462    
463          if fieldType != dbFieldType:          if fieldType != dbFieldType:
# Line 518  class SessionLoader(XMLReader): Line 547  class SessionLoader(XMLReader):
547          self.aLayer = self.aMap.LabelLayer()          self.aLayer = self.aMap.LabelLayer()
548    
549      def start_label(self, name, qname, attrs):      def start_label(self, name, qname, attrs):
550          x = float(attrs[(None, 'x')])          attrs = self.check_attrs(name, attrs,
551          y = float(attrs[(None, 'y')])                                   [AttrDesc("x", True, conversion = float),
552          text = self.encode(attrs[(None, 'text')])                                    AttrDesc("y", True, conversion = float),
553          halign = attrs[(None, 'halign')]                                    AttrDesc("text", True),
554          valign = attrs[(None, 'valign')]                                    AttrDesc("halign", True,
555                                               conversion = "ascii"),
556                                      AttrDesc("valign", True,
557                                               conversion = "ascii")])
558            x = attrs['x']
559            y = attrs['y']
560            text = attrs['text']
561            halign = attrs['halign']
562            valign = attrs['valign']
563            if halign not in ("left", "center", "right"):
564                raise LoadError("Unsupported halign value %r" % halign)
565            if valign not in ("top", "center", "bottom"):
566                raise LoadError("Unsupported valign value %r" % valign)
567          self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign)          self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign)
568    
569      def characters(self, chars):      def characters(self, chars):
# Line 549  def load_session(filename, db_connection Line 590  def load_session(filename, db_connection
590      # Newly loaded session aren't modified      # Newly loaded session aren't modified
591      session.UnsetModified()      session.UnsetModified()
592    
593        handler.Destroy()
594    
595      return session      return session
596    
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