cola/settings.py

   1 # Copyright (c) 2008 David Aguilar
   2 """This handles saving complex settings such as bookmarks, etc.
   3 """
   4
   5 import os
   6 import user
   7
   8 from cola import serializer
   9 from cola.models import observable
  10
  11 # Here we store settings
  12 _rcfile = os.path.join(user.home, '.cola')
  13
  14
  15 class SettingsModel(observable.ObservableModel):
  16     def __init__(self):
  17         """Load existing settings if they exist"""
  18         observable.ObservableModel.__init__(self)
  19         self.bookmarks = []
  20         self.gui_state = {}
  21
  22     def add_bookmark(self, bookmark):
  23         """Adds a bookmark to the saved settings"""
  24         if bookmark not in self.bookmarks:
  25             self.bookmarks.append(bookmark)
  26
  27     def remove_bookmark(self, bookmark):
  28         """Removes a bookmark from the saved settings"""
  29         if bookmark in self.bookmarks:
  30             self.bookmarks.remove(bookmark)
  31
  32
  33 class SettingsManager(object):
  34     """Manages a SettingsModel singleton
  35     """
  36     _settings = None
  37
  38     @staticmethod
  39     def settings():
  40         """Returns the SettingsModel singleton"""
  41         if not SettingsManager._settings:
  42             if os.path.exists(_rcfile):
  43                 SettingsManager._settings = serializer.load(_rcfile)
  44             else:
  45                 SettingsManager._settings = SettingsModel()
  46         return SettingsManager._settings
  47
  48     @staticmethod
  49     def save_gui_state(gui):
  50         """Saves settings for a cola view"""
  51         name = gui.name()
  52         state = gui.export_state()
  53         model = SettingsManager.settings()
  54         model.gui_state[name] = state
  55         SettingsManager.save()
  56
  57     @staticmethod
  58     def gui_state(gui):
  59         """Returns the state for a gui"""
  60         return SettingsManager.settings().gui_state.get(gui.name(), {})
  61
  62     @staticmethod
  63     def save():
  64         model = SettingsManager.settings()
  65         serializer.save(model, _rcfile)