View file File name : watcher.py Content :# -*- 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)