# Miro - an RSS based video player application
# Copyright (C) 2008, 2009, 2010, 2011
# Participatory Culture Foundation
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the OpenSSL
# library.
#
# You must obey the GNU General Public License in all respects for all of
# the code used other than OpenSSL. If you modify file(s) with this
# exception, you may extend this exception to your version of the file(s),
# but you are not obligated to do so. If you do not wish to do so, delete
# this exception statement from your version. If you delete this exception
# statement from all source files in the program, then also delete it here.


"""
Create and store python callbacks so we can call them from XPCOM land
"""

from xpcom import components

from miro.eventloop import as_idle
from miro.plat.xulhelper import makeComp
from miro.util import random_string

_callbacks = {}

def XPCOMifyCallback(callback):
    global _callbacks
    # This assumes that n/(52^50) == 0 when n is small
    idstring = random_string(50)
    _callbacks[idstring] = callback
    c = makeComp("@participatoryculture.org/dtv/pycallback;1",
                 components.interfaces.pcfIDTVPyCallback, True, False)
    c.setCallbackId(idstring)
    return c

@as_idle
def makeCallback(idstring, value):
    _callbacks[idstring](value)
    del _callbacks[idstring]
