#    This file is part of Recently Used Desklet
#
#    Recently Used Desklet is free software; you can redistribute it and/or
#    modify it under the terms of the GNU General Public License as
#    published by the Free Software Foundation; either version 2 of
#    the License, or (at your option) any later version.
 
#    Recently Used Desklet is distributed in the hope that it will be
#    useful, but WITHOUT ANY WARRANTY; without even the implied
#    warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#    See the GNU General Public License for more details.
 
#    You should have received a copy of the GNU General Public License
#    along with Recently Used Desklet; if not, write to the Free
#    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
#    02111-1307  USA

from RecentReader import RecentReader
from utils import FileWatcher
from config.GConfBackend import GConfBackend

import os

_GCONF_PATH = "/desktop/gnome/interface"
    
class RfileSet:

    __RECENTPATH = os.path.expanduser("~/.recently-used")


    __ICON_THEME = "icon_theme"    

    def __init__(self):

        # the recent files
        self.__rfiles = []

        # the visualizer for icons
        self.__visualizer = None

        # gconf watcher for icon theme changes
        self.__gwatcher = GConfBackend(_GCONF_PATH)
        self.__gwatcher.add_observer(self.__on_observe_recent)
        
        watcher = FileWatcher(self.__RECENTPATH)
        watcher.add_observer(self.__on_observe_recent)




    #
    # Call for other methods to force load
    #
    def load_files(self):

        self.__on_observe_recent(None, None)

    #
    # File Watcher
    #
    def __on_observe_recent(self, src, cmd, *args):

        theme = self.__gwatcher.get(self.__ICON_THEME)
        rr = RecentReader(self.__RECENTPATH, theme)
                      
        
        self.__rfiles = rr.get_recent_files()

        if (self.__visualizer): self.__visualizer(self)
        
    #
    # Returns the icon at the given position index.
    #
    def get_rfile(self, index):

        return self.__rfiles[index]



    #
    # Returns the length of the icon set, i.e. the number of the icons in it.
    #
    def get_length(self):

        return len(self.__rfiles)



    #
    # Sets the visualizer function for the icon set. The visualizer is called
    # whenever the icon set changes.
    #
    def set_visualizer(self, handler):

        self.__visualizer = handler