/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/save.py
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revision 366 by jonathan, Mon Jan 27 11:48:17 2003 UTC revision 440 by jonathan, Thu Feb 27 15:54:27 2003 UTC
# Line 2  Line 2 
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
5    # Jonathan Coles <[email protected]>
6  #  #
7  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
8  # 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  __version__ = "$Revision$"  __version__ = "$Revision$"
15    
16    # fix for people using python2.1
17    from __future__ import nested_scopes
18    
19  import os  import os
20  import string  import string
21    
# Line 19  import Thuban.Lib.fileutil Line 23  import Thuban.Lib.fileutil
23    
24  from Thuban.Model.color import Color  from Thuban.Model.color import Color
25    
26    from Thuban.Model.classification import *
27    
28  #  #
29  # one level of indention  # one level of indention
30  #  #
# Line 77  class Saver: Line 83  class Saver:
83          filenames.          filenames.
84          """          """
85    
86          self.indent_level = 0          # keep track of how many levels of indentation to write
87            self.indent_level = 0
88            # track whether an element is currently open. see open_element().
89            self.element_open = 0
90    
91          if hasattr(file_or_filename, "write"):          if hasattr(file_or_filename, "write"):
92              # it's a file object              # it's a file object
# Line 90  class Saver: Line 99  class Saver:
99          self.write_header()          self.write_header()
100          self.write_session(self.session)          self.write_session(self.session)
101    
102          if self.indent_level != 0:          assert(self.indent_level == 0)
             raise ValueError("indent_level still positive!")  
103    
104      def write_attribs(self, attrs):      def write_attribs(self, attrs):
105          for name, value in attrs.items():          for name, value in attrs.items():
             if isinstance(value, Color):  
                 value = value.hex()  
             else:  
                 value = str(value)  
106              self.file.write(' %s="%s"' % (escape(name), escape(value)))              self.file.write(' %s="%s"' % (escape(name), escape(value)))
107            
108      def open_element(self, element, attrs = {}):      def open_element(self, element, attrs = {}):
109    
110            #
111            # we note when an element is opened so that if two open_element()
112            # calls are made successively we can end the currently open
113            # tag and will later write a proper close tag. otherwise,
114            # if a close_element() call is made directly after an open_element()
115            # call we will close the tag with a />
116            #
117            if self.element_open == 1:
118                self.file.write(">\n")
119    
120            self.element_open = 1
121    
122          # Helper function to write an element open tag with attributes          # Helper function to write an element open tag with attributes
123          self.file.write("%s<%s" % (TAB*self.indent_level, element))          self.file.write("%s<%s" % (TAB*self.indent_level, element))
124          self.write_attribs(attrs)          self.write_attribs(attrs)
         self.file.write(">\n")  
125    
126          self.indent_level += 1          self.indent_level += 1
127    
128      def close_element(self, element):      def close_element(self, element):
129          self.indent_level -= 1          self.indent_level -= 1
130          if self.indent_level < 0:          assert(self.indent_level >= 0)
131              raise ValueError("close_element called too many times!")  
132          self.file.write("%s</%s>\n" % (TAB*self.indent_level, element))          # see open_element() for an explanation
133            if self.element_open == 1:
134                self.element_open = 0
135                self.file.write("/>\n")
136            else:
137                self.file.write("%s</%s>\n" % (TAB*self.indent_level, element))
138    
139      def write_element(self, element, attrs = {}):      def write_element(self, element, attrs = {}):
140          # Helper function to write an element open tag with attributes          """write an element that won't need a closing tag"""
141          self.file.write("%s<%s" % (TAB*self.indent_level, element))          self.open_element(element, attrs)
142          self.write_attribs(attrs)          self.close_element(element)
         self.file.write("/>\n")  
143    
144      def write_header(self):      def write_header(self):
145          """Write the XML header"""          """Write the XML header"""
# Line 184  class Saver: Line 204  class Saver:
204          given, should be a mapping from attribute names to attribute          given, should be a mapping from attribute names to attribute
205          values. The values should not be XML-escaped yet.          values. The values should not be XML-escaped yet.
206          """          """
207            lc = layer.GetClassification()
208    
209          if attrs is None:          if attrs is None:
210              attrs = {}              attrs = {}
211          attrs["title"] = layer.title  
212          attrs["filename"] = relative_filename(self.dir, layer.filename)          attrs["title"]        = layer.title
213          attrs["stroke_width"] = str(layer.stroke_width)          attrs["filename"]     = relative_filename(self.dir, layer.filename)
214          fill = layer.fill          attrs["stroke"]       = lc.GetDefaultStroke().hex()
215          if fill is None:          attrs["stroke_width"] = str(lc.GetDefaultStrokeWidth())
216              attrs["fill"] = "None"          attrs["fill"]         = lc.GetDefaultFill().hex()
         else:  
             attrs["fill"] = fill.hex()  
         stroke = layer.stroke  
         if stroke is None:  
             attrs["stroke"] = "None"  
         else:  
             attrs["stroke"] = stroke.hex()  
217    
218          self.open_element("layer", attrs)          self.open_element("layer", attrs)
219          self.write_classification(layer)          self.write_classification(layer)
# Line 208  class Saver: Line 223  class Saver:
223          if attrs is None:          if attrs is None:
224              attrs = {}              attrs = {}
225    
226          lc = layer.classification          lc = layer.GetClassification()
227    
228          field = lc.field          field = lc.GetField()
229    
230          #          #
231          # there isn't a classification of anything          # there isn't a classification of anything
# Line 221  class Saver: Line 236  class Saver:
236          attrs["field"] = field          attrs["field"] = field
237          self.open_element("classification", attrs)          self.open_element("classification", attrs)
238    
239          if lc.NullData is not None:  
240              self.open_element("clnull")  #       self.open_element("clnull")
241              self.write_element("cldata", lc.NullData)  #       write_class_data(lc.GetDefaultData())
242              self.close_element("clnull")  #       self.close_element("clnull")
243                
244          if lc.points != {}:          # just playing now with lambdas and dictionaries
245              for value, data in lc.points.items():  
246                  self.open_element('clpoint value="%s"' % (escape(str(value))))          types = [[lambda p: 'clnull',
247                  self.write_element("cldata", data)                    lambda p: 'clnull'],
248                  self.close_element('clpoint')                   [lambda p: 'clpoint value="%s"' %
249                                           str(p.GetValue()),
250          if lc.ranges != []:                    lambda p: 'clpoint'],
251              for p in lc.ranges:                   [lambda p: 'clrange min="%s" max="%s"' %
252                  self.open_element('clrange min="%s" max="%s"'                               (str(p.GetMin()),
253                      % (escape(str(p[0])), escape(str(p[1]))))                                (str(p.GetMax()))),
254                  self.write_element("cldata", p[2])                    lambda p: 'clrange']]
255                  self.close_element('clrange')  
256            def write_class_group(group):
257                type = -1
258                if isinstance(group, ClassGroupDefault): type = 0
259                elif isinstance(group, ClassGroupSingleton): type = 1
260                elif isinstance(group, ClassGroupRange): type = 2
261                elif isinstance(group, ClassGroupMap):   type = 3
262                assert(type >= 0)
263    
264                if type <= 2:
265                    data = group.GetProperties()
266                    dict = {'stroke'      : data.GetStroke().hex(),
267                            'stroke_width': str(data.GetStrokeWidth()),
268                            'fill'        : data.GetFill().hex()}
269    
270                    self.open_element(types[type][0](group))
271                    self.write_element("cldata", dict)
272                    self.close_element(types[type][1](group))
273                else: pass # XXX: we need to handle maps
274    
275            for i in lc:
276                write_class_group(i)
277    
278    #       for i in lc:
279    #           t = i.GetType()
280    #           self.open_element(types[t][0](i))
281    #           write_class_data(i)
282    #           self.close_element(types[t][1](i))
283    
284    #       for p in lc:
285    #           type = p.GetType()
286    #           if p == ClassData.DEFAULT:
287    #               lopen = lclose = 'clnull'
288    #           elif p == ClassData.POINTS:
289    #               lopen = 'clpoint value="%s"' % escape(str(p.GetValue()))
290    #               lclose = 'clpoint'
291    #           elif p == ClassData.RANGES:
292    #               lopen = 'clrange min="%s" max="%s"'
293    #                   % (escape(str(p.GetMin())), escape(str(p.GetMax()))))
294    #               lclose = 'clrange'
295    
296    #           self.open_element(lopen)
297    #           write_class_data(p)
298    #           self.close_element(lclose)
299                
300    #       if lc.points != {}:
301    #           for p in lc.points.values():
302    #               self.open_element('clpoint value="%s"' %
303    #                   (escape(str(p.GetValue()))))
304    #               write_class_data(p)
305    #               self.close_element('clpoint')
306    #          
307    #       if lc.ranges != []:
308    #           for p in lc.ranges:
309    #               self.open_element('clrange min="%s" max="%s"'
310    #                   % (escape(str(p.GetMin())), escape(str(p.GetMax()))))
311    #               write_class_data(p)
312    #               self.close_element('clrange')
313    
314          self.close_element("classification")          self.close_element("classification")
315    
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