/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/resource.py
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revision 709 by jonathan, Wed Apr 23 08:45:44 2003 UTC revision 1132 by frank, Thu Jun 5 13:27:17 2003 UTC
# Line 6  Line 6 
6  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
7    
8  import os  import os
9    import os.path
10    from tempfile import mktemp
11    
12  import Thuban  import Thuban
13    from Thuban import _
14    
15  from Thuban.Model.load import XMLReader  from Thuban.Model.load import XMLReader
16  from Thuban.Model.save import XMLWriter  from Thuban.Model.save import XMLWriter
17  from Thuban.Model.proj import Projection, ProjFile  from Thuban.Model.proj import Projection, ProjFile
18    from xml.sax import SAXParseException
19    
20  projdir = \  projdir = \
21          os.path.join(Thuban.__path__[0], os.pardir, "Resources", "Projections")          os.path.join(Thuban.__path__[0], os.pardir, "Resources", "Projections")
22    
23  usrdir  = os.path.expanduser("~/.thuban")  if os.name == 'nt':
24        # This should result in something like the user directory ...
25        guess = os.path.dirname(os.path.dirname(os.path.dirname(mktemp())))
26        usrdir = os.path.join(guess, ".thuban")
27        if not os.path.isdir(usrdir):
28            os.mkdir(usrdir)
29    else:
30        usrdir  = os.path.expanduser("~/.thuban")
31    
32  PROJ_EXT = ".proj"  PROJ_EXT = ".proj"
33    
34  def ReadProjFile(filename):  def ReadProjFile(filename):
35      """Read a single .proj file and return a ProjFile object."""      """Read a single .proj file and return a ProjFile object.
36        
37      projs = []      Raises IOError if the file cannot be opened.
38      try:      Raises OSError if the file cannot be read.
39          handler = ProjFileReader()      Raises SAXParseException if the file is not valid XML.
40          handler.read(filename)      """
         pf = handler.GetProjFile()  
     except OSError:  
         pass  
41    
42      return pf      handler = ProjFileReader()
43        handler.read(filename)
44        return handler.GetProjFile()
45    
46  def WriteProjFile(pf):  def WriteProjFile(pf):
47        """Write a single .proj file
48    
49        Raises IOError if the file cannot be written.
50        """
51    
52      saver = ProjFileSaver(pf)      saver = ProjFileSaver(pf)
53      saver.write(pf.GetFileName())      saver.write(pf.GetFilename())
54    
55  def GetProjFiles(dir):  def GetProjFiles(dir):
56      """Read all .proj files in the given directory and      """Read all .proj files in the given directory and
# Line 42  def GetProjFiles(dir): Line 59  def GetProjFiles(dir):
59    
60      list = []      list = []
61      try:      try:
62          for file in filter(lambda s: s.endswith(PROJ_EXT), os.listdir(dir)):          dirlist = os.listdir(dir)
             filename = os.path.join(dir, file)  
             list.append(ReadProjFile(filename))  
63      except OSError:      except OSError:
64          pass          pass # if we can't get a directory listing just return []
65        else:
66            for file in filter(lambda s: s.endswith(PROJ_EXT), dirlist):
67                try:
68                    filename = os.path.join(dir, file)
69                    list.append(ReadProjFile(filename))
70                except (OSError, IOError, SAXParseException):
71                    pass # just move onto the next file
72    
73      return list      return list
74    
75  def GetSystemProjFiles():  def GetSystemProjFiles():
76      """Return a list of ProjFile objects from files that are      """Return a list of ProjFile objects from files that are
77      supplied by Thuban.      supplied by Thuban.
78    
79        If no files could not be opened return a list with one
80        empty projection file set to store data in the default file.
81      """      """
82      return GetProjFiles(projdir)      filename = os.path.join(projdir, "defaults.proj")
83        try:
84            return [ReadProjFile(filename)]
85        except (OSError, IOError, SAXParseException):
86            return [ProjFile(filename)]
87    
88  def GetUserProjFiles():  def GetUserProjFiles():
89      """Return a list of ProjFile objects from files that are user-defined."""      """Return a list of ProjFile objects from files that are user-defined.
90      return GetProjFiles(usrdir)  
91        If no files could not be opened return a list with one
92        empty projection file set to store data in the default file.
93        """
94    
95        filename = os.path.join(usrdir, "user.proj")
96        try:
97            return [ReadProjFile(filename)]
98        except (OSError, IOError, SAXParseException):
99            return [ProjFile(filename)]
100    
101  class ProjFileReader(XMLReader):  class ProjFileReader(XMLReader):
102    
# Line 73  class ProjFileReader(XMLReader): Line 111  class ProjFileReader(XMLReader):
111      def read(self, file_or_filename):      def read(self, file_or_filename):
112          XMLReader.read(self, file_or_filename)          XMLReader.read(self, file_or_filename)
113    
114          self.__pf.SetFileName(XMLReader.GetFileName(self))          self.__pf.SetFilename(XMLReader.GetFilename(self))
115                    
116      def start_projection(self, name, qname, attrs):      def start_projection(self, name, qname, attrs):
117          self.params = []          self.params = []
118          self.name = attrs.get((None, 'name'), "Unknown")          self.name = self.encode(attrs.get((None, 'name'), _("Unknown")))
119    
120      def end_projection(self, name, qname):      def end_projection(self, name, qname):
121          self.__pf.Add(Projection(self.params, self.name))          self.__pf.Add(Projection(self.params, self.name))
# Line 100  class ProjFileSaver(XMLWriter): Line 138  class ProjFileSaver(XMLWriter):
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("projfile", "thuban.dtd")          self.write_header("projfile", "projfile.dtd")
142          self.write_projfile(self.__pf)          self.write_projfile(self.__pf)
143          self.close()          self.close()
144    
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