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# -*- coding: utf-8 -*-
#
# Copyright (C) 2012-2016 Red Hat, Inc.
#
# Authors:
# Thomas Woerner <twoerner@redhat.com>
#
# 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, see <http://www.gnu.org/licenses/>.
#
__all__ = [ "Watcher" ]
from gi.repository import Gio, GLib
class Watcher(object):
def __init__(self, callback, timeout):
self._callback = callback
self._timeout = timeout
self._monitors = { }
self._timeouts = { }
self._blocked = [ ]
def add_watch_dir(self, directory):
gfile = Gio.File.new_for_path(directory)
self._monitors[directory] = gfile.monitor_directory(\
Gio.FileMonitorFlags.NONE, None)
self._monitors[directory].connect("changed", self._file_changed_cb)
def add_watch_file(self, filename):
gfile = Gio.File.new_for_path(filename)
self._monitors[filename] = gfile.monitor_file(\
Gio.FileMonitorFlags.NONE, None)
self._monitors[filename].connect("changed", self._file_changed_cb)
def get_watches(self):
return self._monitors.keys()
def has_watch(self, filename):
return filename in self._monitors
def remove_watch(self, filename):
del self._monitors[filename]
def block_source(self, filename):
if filename not in self._blocked:
self._blocked.append(filename)
def unblock_source(self, filename):
if filename in self._blocked:
self._blocked.remove(filename)
def clear_timeouts(self):
for filename in list(self._timeouts.keys()):
GLib.source_remove(self._timeouts[filename])
del self._timeouts[filename]
def _call_callback(self, filename):
if filename not in self._blocked:
self._callback(filename)
del self._timeouts[filename]
def _file_changed_cb(self, monitor, gio_file, gio_other_file, event):
filename = gio_file.get_parse_name()
if filename in self._blocked:
if filename in self._timeouts:
GLib.source_remove(self._timeouts[filename])
del self._timeouts[filename]
return
if event == Gio.FileMonitorEvent.CHANGED or \
event == Gio.FileMonitorEvent.CREATED or \
event == Gio.FileMonitorEvent.DELETED or \
event == Gio.FileMonitorEvent.ATTRIBUTE_CHANGED:
if filename in self._timeouts:
GLib.source_remove(self._timeouts[filename])
del self._timeouts[filename]
self._timeouts[filename] = GLib.timeout_add_seconds(\
self._timeout, self._call_callback, filename)