Package libxyz :: Package vfs :: Module vfsobj

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# Source Code for Module libxyz.vfs.vfsobj

      1  #-*- coding: utf8 -*
      2  #
      3  # Max E. Kuznecov ~syhpoon <syhpoon@syhpoon.name> 2008
      4  #
      5  # This file is part of XYZCommander.
      6  # XYZCommander is free software: you can redistribute it and/or modify
      7  # it under the terms of the GNU Lesser Public License as published by
      8  # the Free Software Foundation, either version 3 of the License, or
      9  # (at your option) any later version.
     10  # XYZCommander is distributed in the hope that it will be useful,
     11  # but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
     13  # GNU Lesser Public License for more details.
     14  # You should have received a copy of the GNU Lesser Public License
     15  # along with XYZCommander. If not, see <http://www.gnu.org/licenses/>.
     16
     17  import os
     18
     19  from libxyz.core.utils import bstring, ustring
     20  from libxyz.vfs import types
     21
     22 -class VFSObject(object):
     23      """
     24      Abstract interface for VFS objects
     25      """
     26
     27 -    def __init__(self, xyz, path, full_path, ext_path, driver, parent,
     28                   enc=None, **kwargs):
     29          self.xyz = xyz
     30          self.enc = enc or xyzenc
     31          self.path = bstring(path, self.enc)
     32          self.full_path = bstring(full_path, self.enc)
     33          self.ext_path = bstring(ext_path, self.enc)
     34          self.parent = parent
     35          self.driver = driver
     36          self.kwargs = kwargs
     37
     38          # File name
     39          self.name = os.path.basename(self.path)
     40
     41          # File type
     42          self.ftype = None
     43
     44          # Access time
     45          self.atime = None
     46
     47          # Modified time
     48          self.mtime = None
     49
     50          # Changed time
     51          self.ctime = None
     52
     53          # Size in bytes
     54          self.size = None
     55
     56          # Owner UID
     57          self.uid = None
     58
     59          # Group
     60          self.gid = None
     61
     62          # Mode
     63          self.mode = None
     64
     65          # Inode
     66          self.inode = None
     67
     68          # Visual file type
     69          self.vtype = None
     70
     71          # Visual file representation
     72          self.visual = None
     73
     74          # File info
     75          self.info = None
     76
     77          # Any type-specific data
     78          self.data = None
     79
     80          # List of significant attributes
     81          self.attributes = ()
     82
     83          # Run local constructor
     84          self._prepare()
     85
     86          self.__ni_msg = _(u"Feature not implemented")
     87
     88      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     89
     90 -    def is_file(self):
     91          """
     92          Return True if instance is representing regular file
     93          """
     94
     95          return isinstance(self.ftype, types.VFSTypeFile)
     96
     97      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     98
     99 -    def is_dir(self):
    100          """
    101          Return True if instance is representing directory
    102          """
    103
    104          return isinstance(self.ftype, types.VFSTypeDir)
    105
    106      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    107
    108 -    def is_dir_empty(self):
    109          """
    110          Return True if instance is representing directory and it is empty
    111          """
    112
    113          if not self.is_dir():
    114              return False
    115
    116          _, _, dirs, files = self.walk()
    117
    118          return len(dirs) == 0 and len(files) == 0
    119
    120      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    121
    122 -    def is_link(self):
    123          """
    124          Return True if instance is representing soft link
    125          """
    126
    127          return isinstance(self.ftype, types.VFSTypeLink)
    128
    129      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    130
    131 -    def is_char(self):
    132          """
    133          Return True if instance is representing soft char device
    134          """
    135
    136          return isinstance(self.ftype, types.VFSTypeChar)
    137
    138      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    139
    140 -    def is_block(self):
    141          """
    142          Return True if instance is representing block device
    143          """
    144
    145          return isinstance(self.ftype, types.VFSTypeBlock)
    146
    147      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    148
    149 -    def is_fifo(self):
    150          """
    151          Return True if instance is representing FIFO
    152          """
    153
    154          return isinstance(self.ftype, types.VFSTypeFifo)
    155
    156      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    157
    158 -    def is_socket(self):
    159          """
    160          Return True if instance is representing socket
    161          """
    162
    163          return isinstance(self.ftype, types.VFSTypeSocket)
    164
    165      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    166
    167 -    def copy(self, path, existcb=None, errorcb=None,
    168               save_attrs=True, follow_links=False, cancel=None):
    169          """
    170          Copy file to specified location
    171
    172          @param path: Local path to copy file to
    173          @param existcb: Callback function to be called if there exists
    174                          an object in target directory with the same name.
    175                          Callback function receives VFSObject instance as an
    176                          argument and must return one of:
    177                          'override' - to override this very object
    178                          'override all' - to override any future collisions
    179                          'skip' - to skip the object
    180                          'skip all' - to skip all future collisions
    181                          'abort' - to abort the process.
    182                          If no existscb provided 'abort' is used as default
    183          @param errorcb: Callback function to be called in case an error occured
    184                          during copying. Function receives VFSObject instance
    185                          and error string as arguments and must return one of:
    186                          'skip' - to continue the process
    187                          'skip all' - to skip all future errors
    188                          'abort' - to abort the process.
    189                          If no errorcb provided 'abort' is used as default
    190          @param save_attrs: Whether to save object attributes
    191          @param follow_links: Whether to follow symlinks
    192          @param cancel: a threading.Event instance, if it is found set - abort
    193          """
    194
    195          raise NotImplementedError(self.__ni_msg)
    196
    197      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    198
    199 -    def move(self, path, existcb=None, errorcb=None, save_attrs=True,
    200               follow_links=False, cancel=None):
    201          """
    202          Move object
    203          Arguments are the same as for copy()
    204          """
    205
    206          raise NotImplementedError(self.__ni_msg)
    207
    208      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    209
    210 -    def mkdir(self, newdir):
    211          """
    212          Create new dir inside object (only valid for directory object types)
    213          """
    214
    215          raise NotImplementedError(self.__ni_msg)
    216
    217      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    218
    219 -    def remove(self, recursive=True):
    220          """
    221          [Recursively] remove object
    222          """
    223
    224          raise NotImplementedError(self.__ni_msg)
    225
    226      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    227
    228 -    def walk(self):
    229          """
    230          Directory tree generator
    231          """
    232
    233          raise NotImplementedError(self.__ni_msg)
    234
    235      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    236
    237 -    def __repr__(self):
    238          return self.__str__()
    239
    240      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    241
    242 -    def __unicode__(self):
    243          return ustring(self.__str__)
    244
    245      #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    246
    247 -    def _prepare(self):
    248          raise NotImplementedError(self.__ni_msg)
    249