/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/save.py
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revision 1638 by bh, Fri Aug 22 18:19:14 2003 UTC revision 2659 by jan, Wed Jul 27 21:51:31 2005 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001-2005 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]> (2004-2005)
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]> (2001-2004)
5  # Jonathan Coles <[email protected]>  # Jonathan Coles <[email protected]> (2003)
6    # Frank Koormann <[email protected]> (2003)
7  #  #
8  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
9  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 12  Functions to save a session to a file Line 13  Functions to save a session to a file
13  """  """
14    
15  __version__ = "$Revision$"  __version__ = "$Revision$"
16    # $Source$
17    # $Id$
18    
19  import os  import os
20    
# Line 23  from Thuban.Model.classification import Line 26  from Thuban.Model.classification import
26      ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap      ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap
27  from Thuban.Model.transientdb import AutoTransientTable, TransientJoinedTable  from Thuban.Model.transientdb import AutoTransientTable, TransientJoinedTable
28  from Thuban.Model.table import DBFTable, FIELDTYPE_STRING  from Thuban.Model.table import DBFTable, FIELDTYPE_STRING
29  from Thuban.Model.data import DerivedShapeStore, ShapefileStore  from Thuban.Model.data import DerivedShapeStore, FileShapeStore, \
30                                  SHAPETYPE_POINT
31    
32  from Thuban.Model.xmlwriter import XMLWriter  from Thuban.Model.xmlwriter import XMLWriter
33  from postgisdb import PostGISConnection, PostGISShapeStore  from postgisdb import PostGISConnection, PostGISShapeStore
# Line 41  def relative_filename(dir, filename): Line 45  def relative_filename(dir, filename):
45          return filename          return filename
46    
47    
48    def unify_filename(filename):
49        """Return a 'unified' version of filename
50    
51        The .thuban files should be as platform independent as possible.
52        Since they must contain filenames the filenames have to unified. We
53        unify on unix-like filenames for now, which means we do nothing on a
54        posix system and simply replace backslashes with slashes on windows
55        """
56        if os.name == "posix":
57            return filename
58        elif os.name == "nt":
59            return "/".join(filename.split("\\"))
60        else:
61            raise RuntimeError("Unsupported platform for unify_filename: %s"
62                               % os.name)
63    
64  def sort_data_stores(stores):  def sort_data_stores(stores):
65      """Return a topologically sorted version of the sequence of data containers      """Return a topologically sorted version of the sequence of data containers
66    
# Line 70  def sort_data_stores(stores): Line 90  def sort_data_stores(stores):
90              processed[id(container)] = 1              processed[id(container)] = 1
91      return result      return result
92    
93    def bool2str(b):
94        if b: return "true"
95        else: return "false"
96    
97  class SessionSaver(XMLWriter):  class SessionSaver(XMLWriter):
98    
# Line 103  class SessionSaver(XMLWriter): Line 126  class SessionSaver(XMLWriter):
126      def has_id(self, obj):      def has_id(self, obj):
127          return self.idmap.has_key(id(obj))          return self.idmap.has_key(id(obj))
128    
129        def prepare_filename(self, filename):
130            """Return the string to use when writing filename to the thuban file
131    
132            The returned string is a unified version (only slashes as
133            directory separators, see unify_filename) of filename expressed
134            relative to the directory the .thuban file is written to.
135            """
136            return unify_filename(relative_filename(self.dir, filename))
137    
138      def write(self, file_or_filename):      def write(self, file_or_filename):
139          XMLWriter.write(self, file_or_filename)          XMLWriter.write(self, file_or_filename)
140    
141          self.write_header("session", "thuban-0.9.dtd")          self.write_header("session", "thuban-1.1.dtd")
142          self.write_session(self.session)          self.write_session(self.session)
143          self.close()          self.close()
144    
# Line 133  class SessionSaver(XMLWriter): Line 165  class SessionSaver(XMLWriter):
165              attrs["xmlns:" + name] = uri              attrs["xmlns:" + name] = uri
166          # default name space          # default name space
167          attrs["xmlns"] = \          attrs["xmlns"] = \
168                 "http://thuban.intevation.org/dtds/thuban-0.9-dev.dtd"                 "http://thuban.intevation.org/dtds/thuban-1.1-dev.dtd"
169          self.open_element("session", attrs)          self.open_element("session", attrs)
170          self.write_db_connections(session)          self.write_db_connections(session)
171          self.write_data_containers(session)          self.write_data_containers(session)
# Line 169  class SessionSaver(XMLWriter): Line 201  class SessionSaver(XMLWriter):
201                  continue                  continue
202    
203              idvalue = self.define_id(container)              idvalue = self.define_id(container)
204              if isinstance(container, ShapefileStore):              if isinstance(container, FileShapeStore):
205                  self.define_id(container.Table(), idvalue)                  self.define_id(container.Table(), idvalue)
206                  filename = relative_filename(self.dir, container.FileName())                  filename = self.prepare_filename(container.FileName())
207                  self.write_element("fileshapesource",                  self.write_element("fileshapesource",
208                                     {"id": idvalue, "filename": filename,                                     {"id": idvalue, "filename": filename,
209                                      "filetype": "shapefile"})                                      "filetype": container.FileType()})
210              elif isinstance(container, DerivedShapeStore):              elif isinstance(container, DerivedShapeStore):
211                  shapesource, table = container.Dependencies()                  shapesource, table = container.Dependencies()
212                  self.write_element("derivedshapesource",                  self.write_element("derivedshapesource",
# Line 186  class SessionSaver(XMLWriter): Line 218  class SessionSaver(XMLWriter):
218                  self.write_element("dbshapesource",                  self.write_element("dbshapesource",
219                                     {"id": idvalue,                                     {"id": idvalue,
220                                      "dbconn": self.get_id(conn),                                      "dbconn": self.get_id(conn),
221                                      "tablename": container.TableName()})                                      "tablename": container.TableName(),
222                                        "id_column": container.IDColumn().name,
223                                        "geometry_column":
224                                          container.GeometryColumn().name,
225                                        })
226              elif isinstance(container, DBFTable):              elif isinstance(container, DBFTable):
227                  filename = relative_filename(self.dir, container.FileName())                  filename = self.prepare_filename(container.FileName())
228                  self.write_element("filetable",                  self.write_element("filetable",
229                                     {"id": idvalue,                                     {"id": idvalue,
230                                      "title": container.Title(),                                      "title": container.Title(),
# Line 229  class SessionSaver(XMLWriter): Line 265  class SessionSaver(XMLWriter):
265          """Write the projection.          """Write the projection.
266          """          """
267          if projection and len(projection.params) > 0:          if projection and len(projection.params) > 0:
268              self.open_element("projection", {"name": projection.GetName()})              attrs = {"name": projection.GetName()}
269                epsg = projection.EPSGCode()
270                if epsg is not None:
271                    attrs["epsg"] = epsg
272                self.open_element("projection", attrs)
273              for param in projection.params:              for param in projection.params:
274                  self.write_element('parameter value="%s"' %                  self.write_element('parameter value="%s"' %
275                                     self.encode(param))                                     self.encode(param))
# Line 247  class SessionSaver(XMLWriter): Line 287  class SessionSaver(XMLWriter):
287              attrs = {}              attrs = {}
288    
289          attrs["title"]   = layer.title          attrs["title"]   = layer.title
290          attrs["visible"] = ("false", "true")[int(layer.Visible())]          attrs["visible"] = bool2str(layer.Visible())
291    
292          if isinstance(layer, Layer):          if isinstance(layer, Layer):
293              attrs["shapestore"]   = self.get_id(layer.ShapeStore())              attrs["shapestore"]   = self.get_id(layer.ShapeStore())
   
             lc = layer.GetClassification()  
             attrs["stroke"] = lc.GetDefaultLineColor().hex()  
             attrs["stroke_width"] = str(lc.GetDefaultLineWidth())  
             attrs["fill"] = lc.GetDefaultFill().hex()  
   
294              self.open_element("layer", attrs)              self.open_element("layer", attrs)
295              self.write_projection(layer.GetProjection())              self.write_projection(layer.GetProjection())
296              self.write_classification(layer)              self.write_classification(layer)
297              self.close_element("layer")              self.close_element("layer")
298          elif isinstance(layer, RasterLayer):          elif isinstance(layer, RasterLayer):
299              attrs["filename"] = relative_filename(self.dir, layer.filename)              attrs["filename"] = self.prepare_filename(layer.filename)
300    
301                masknames = ["none", "bit", "alpha"]
302    
303                if layer.MaskType() != layer.MASK_BIT:
304                    attrs["masktype"] = masknames[layer.MaskType()]
305    
306                if layer.Opacity() != 1:
307                    attrs["opacity"] = str(layer.Opacity())
308    
309              self.open_element("rasterlayer", attrs)              self.open_element("rasterlayer", attrs)
310              self.write_projection(layer.GetProjection())              self.write_projection(layer.GetProjection())
311              self.close_element("rasterlayer")              self.close_element("rasterlayer")
# Line 277  class SessionSaver(XMLWriter): Line 320  class SessionSaver(XMLWriter):
320    
321          field = layer.GetClassificationColumn()          field = layer.GetClassificationColumn()
322    
323          #          if field is not None:
324          # there isn't a classification of anything so do nothing              attrs["field"] = field
325          #              attrs["field_type"] = str(layer.GetFieldType(field))
         if field is None: return  
326    
         attrs["field"] = field  
         attrs["field_type"] = str(layer.GetFieldType(field))  
327          self.open_element("classification", attrs)          self.open_element("classification", attrs)
328    
329          for g in lc:          for g in lc:
# Line 311  class SessionSaver(XMLWriter): Line 351  class SessionSaver(XMLWriter):
351                      'stroke_width': str(data.GetLineWidth()),                      'stroke_width': str(data.GetLineWidth()),
352                      'fill'        : data.GetFill().hex()}                      'fill'        : data.GetFill().hex()}
353    
354                # only for point layers write the size attribute
355                if layer.ShapeType() == SHAPETYPE_POINT:
356                    dict['size'] =  str(data.GetSize())
357    
358              self.open_element(open_el)              self.open_element(open_el)
359              self.write_element("cldata", dict)              self.write_element("cldata", dict)
360              self.close_element(close_el)              self.close_element(close_el)
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