nephilim/plugins/__init__.py

   1 #
   2 #    Copyright (C) 2009 Anton Khirnov <wyskas@gmail.com>
   3 #
   4 #    Nephilim is free software: you can redistribute it and/or modify
   5 #    it under the terms of the GNU General Public License as published by
   6 #    the Free Software Foundation, either version 3 of the License, or
   7 #    (at your option) any later version.
   8 #
   9 #    Nephilim is distributed in the hope that it will be useful,
  10 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 #    GNU General Public License for more details.
  13 #
  14 #    You should have received a copy of the GNU General Public License
  15 #    along with Nephilim.  If not, see <http://www.gnu.org/licenses/>.
  16 #
  17
  18
  19 import sys
  20 import logging
  21
  22 __all__ = ['AlbumCover', 'Filebrowser', 'Library', 'Lyrics', 'Notify', 'PlayControl',
  23            'Playlist', 'Songinfo', 'Systray']
  24
  25 class Plugins:
  26     _plugins   = None
  27     parent = None
  28     mpclient   = None
  29
  30     def __init__(self, parent, mpclient):
  31         """load all modules in the plugins directory."""
  32         self._plugins = {}
  33         self.parent   = parent
  34         self.mpclient = mpclient
  35
  36         for name in __all__:
  37             self.init_plugin(name)
  38
  39     def plugin(self, name):
  40         return self._plugins[name] if name in self._plugins else None
  41
  42     def init_plugin(self, name):
  43         try:
  44             if name in sys.modules:
  45                 reload(sys.modules[name])
  46                 module = sys.modules[name]
  47             else:
  48                 module = __import__(name, globals(), locals(), [], 1)
  49         except SyntaxError, e:
  50             logging.error('Failed to initialize plugin %s: %s.'%(name, e))
  51             return False
  52
  53         self._plugins[name] = eval('module.%s(self.parent, self.mpclient, \'%s\')'%(name, name))
  54         return True
  55
  56     def load(self, name):
  57         if not name in self._plugins:
  58             if not self.init_plugin(name):
  59                 return False
  60
  61         self._plugins[name].load()
  62         return True
  63
  64     def unload(self, name):
  65         if name in self._plugins:
  66             if self._plugins[name].is_loaded():
  67                 self._plugins[name].unload()
  68
  69     def plugins(self):
  70         return self._plugins.values()
  71
  72     def loaded_plugins(self):
  73         list = []
  74         for plugin in self._plugins.values():
  75             if plugin.is_loaded():
  76                 list.append(plugin)
  77         return list