#!/usr/pkg/bin/python3.13
"""
Syncthing-GTK - App

Main application window
"""


import itertools
import logging
import os
import re
import shutil
import signal
import sys
import time
import webbrowser
from datetime import datetime

from gi.repository import Gdk, GdkPixbuf, Gio, GLib, Gtk

from syncthing_gtk.configuration import Configuration
from syncthing_gtk.daemon import Daemon, InvalidConfigurationException, TLSErrorException
from syncthing_gtk.daemonoutputdialog import DaemonOutputDialog
from syncthing_gtk.daemonprocess import DaemonProcess
from syncthing_gtk.deviceeditor import DeviceEditorDialog
from syncthing_gtk.foldereditor import FolderEditorDialog
from syncthing_gtk.identicon import IdentIcon
from syncthing_gtk.infobox import InfoBox
from syncthing_gtk.notifications import HAS_DESKTOP_NOTIFY, Notifications
from syncthing_gtk.ribar import RIBar
from syncthing_gtk.statusicon import StatusIconDummy, get_status_icon
from syncthing_gtk.stdownloader import StDownloader
from syncthing_gtk.timermanager import TimerManager
from syncthing_gtk.tools import (
    IS_GNOME,
    IS_I3,
    IS_MATE,
    IS_UNITY,
    IS_WINDOWS,
    IS_XFCE,
    IS_XP,
    _,
    can_upgrade_binary,
    check_daemon_running,
    compare_version,
    generate_folder_id,
    parse_config_arguments,
    set_logging_level,
    sizeof_fmt,
)
from syncthing_gtk.uibuilder import UIBuilder

log = logging.getLogger("App")

# Internal version used by updater (if enabled)
INTERNAL_VERSION = "v0.9.4.5"
# Minimal Syncthing version supported by App
MIN_ST_VERSION = "0.14.50"

COLOR_DEVICE = "#707070"  # Dark-gray
COLOR_DEVICE_SYNCING = "#2A89C8"  # Blue
COLOR_DEVICE_CONNECTED = "#2AAB61"  # Green
COLOR_DEVICE_OFFLINE = COLOR_DEVICE  # Dark-gray
COLOR_DEVICE_ERROR = "#87000B"  # Red
COLOR_OWN_DEVICE = "#C0C0C0"  # Light-gray
COLOR_FOLDER = "#9246B1"  # Dark-purple
COLOR_FOLDER_SYNCING = COLOR_DEVICE_SYNCING  # Blue
COLOR_FOLDER_SCANNING = COLOR_DEVICE_SYNCING  # Blue
COLOR_FOLDER_IDLE = COLOR_DEVICE_CONNECTED  # Green
COLOR_FOLDER_STOPPED = COLOR_DEVICE_ERROR  # Red
COLOR_FOLDER_OFFLINE = COLOR_DEVICE_OFFLINE  # Dark-gray
COLOR_NEW = COLOR_OWN_DEVICE  # Light-gray
SI_FRAMES = 12  # Number of animation frames for status icon

# Response IDs
RESPONSE_RESTART = 256
RESPONSE_FIX_ADD_FOLDER = 257
RESPONSE_FIX_IGNORE_FOLDER = 258
RESPONSE_FIX_ADD_DEVICE = 259
RESPONSE_FIX_IGNORE_DEV = 260
RESPONSE_QUIT = 261
RESPONSE_START_DAEMON = 271
RESPONSE_SLAIN_DAEMON = 272
RESPONSE_SPARE_DAEMON = 273
RESPONSE_UR_ALLOW = 274
RESPONSE_UR_FORBID = 275

# RI's
REFRESH_INTERVAL_DEFAULT = 1
REFRESH_INTERVAL_TRAY = 5

# If daemon dies twice in this interval, broken settings are assumed
RESTART_TOO_FREQUENT_INTERVAL = 5

UPDATE_CHECK_INTERVAL = 12 * 60 * 60

# Speed values in outcoming/incoming speed limit menus
SPEED_LIMIT_VALUES = [10, 25, 50, 75, 100, 200, 500, 750, 1000, 2000, 5000]


class App(Gtk.Application, TimerManager):
    """
    Main application / window.
    Hide parameter controlls if app should be minimized to status icon
    after start.
    """

    def __init__(self, gladepath="/usr/pkg/share/syncthing-gtk", iconpath="/usr/share/syncthing-gtk/icons"):
        Gtk.Application.__init__(
            self, application_id="me.kozec.syncthingtk", flags=Gio.ApplicationFlags.HANDLES_COMMAND_LINE
        )
        TimerManager.__init__(self)
        # Setup Gtk.Application
        self.setup_commandline()
        # Set variables
        self.gladepath = gladepath
        self.iconpath = iconpath
        self.builder = None
        self.rightclick_box = None
        self.config = Configuration()
        self.process = None
        self.hide_window = self.config["minimize_on_start"]
        self.show_status_icon = True
        self.exit_after_wizard = False
        self.last_restart_time = 0.0
        # Can be changed by --force-update=vX.Y.Z argument
        self.force_update_version = None
        # Determine if header bar should be shown
        # User setting is not visible under Unity/Gnome
        self.use_headerbar = (
            not IS_UNITY
            and (not self.config["use_old_header"] or IS_GNOME)
            and (Gtk.get_major_version(), Gtk.get_minor_version()) >= (3, 10)
        )

        self.daemon = None  # Created by setup_connection method
        # If enabled (by -o argument), daemon output is captured and printed
        # to stdout
        self.dump_daemon_output = None
        self.notifications = None
        # connect_dialog may be displayed during initial communication
        # or if daemon shuts down.
        self.connect_dialog = None
        # Used when upgrading from incompatible version
        self.restart_after_update = None
        self.dark_color = None  # RGBA. None by default, changes with dark themes
        self.recv_limit = -1  # Used mainly to prevent menu handlers from recursing
        self.send_limit = -1  # -//-
        self.ur_question_shown = False  # Used to prevent showing 'Do you want usage reporting'
        # question more than once until ST-GTK is restarted.
        self.home_dir_override = None  # If set by '--home'
        self.wizard = None
        self.widgets = {}
        self.error_boxes = []
        self.error_messages = set([])  # Holds set of already displayed error messages
        self.folders = {}
        self.devices = {}
        self.open_boxes = set([])  # Holds set of expanded device/folder boxes
        self.devices_never_loaded = True
        self.folders_never_loaded = True
        self.sync_animation = 0

        self.editor_device = None
        self.editor_folder = None

    def do_startup(self, *a):
        Gtk.Application.do_startup(self, *a)
        self.setup_signal_handlers()
        self.setup_widgets()
        self.setup_actions()
        self.setup_statusicon()

    def setup_signal_handlers(self):
        def sigint(*a):
            print("\n*break*")
            sys.exit(0)

        def sigterm(*a):
            log.error("SIGTERM recieved, exiting...")
            self.quit()

        signal.signal(signal.SIGINT, sigint)
        signal.signal(signal.SIGTERM, sigterm)

    def do_local_options(self, trash, lo):
        self.parse_local_options(lo.contains)
        return -1

    def parse_local_options(self, is_option):
        """Test for expected options using specified method"""
        set_logging_level(is_option("verbose"), is_option("debug"))
        if is_option("header"):
            self.use_headerbar = False
        if is_option("window"):
            self.hide_window = False
        if is_option("minimized"):
            self.hide_window = True
        if is_option("dump"):
            self.dump_daemon_output = True
        if is_option("no-status-icon"):
            self.show_status_icon = False
        if is_option("wizard"):
            self.exit_after_wizard = True
            self.show_wizard()
        elif is_option("about"):
            from syncthing_gtk.aboutdialog import AboutDialog

            ad = AboutDialog(self, self.gladepath, self.iconpath)
            ad.run([])
            sys.exit(0)

    def do_command_line(self, cl):
        Gtk.Application.do_command_line(self, cl)
        new_glib = GLib.glib_version >= (2, 40, 0)
        if new_glib:
            if cl.get_options_dict().contains("quit"):
                self.cb_exit()
                return 0
            if cl.get_options_dict().contains("home"):
                self.home_dir_override = cl.get_options_dict().lookup_value("home").get_string()
            if cl.get_options_dict().contains("force-update"):
                self.force_update_version = cl.get_options_dict().lookup_value("force-update").get_string()
                if not self.force_update_version.startswith("v"):
                    self.force_update_version = "v%s" % (self.force_update_version,)
            if cl.get_options_dict().contains("add-repo"):
                path = os.path.abspath(os.path.expanduser(cl.get_options_dict().lookup_value("add-repo").get_string()))
                self.show_add_folder_dialog(path)
            if cl.get_options_dict().contains("remove-repo"):
                path = os.path.abspath(
                    os.path.expanduser(cl.get_options_dict().lookup_value("remove-repo").get_string())
                )
                self.show_remove_folder_dialog(path)
        else:
            # Fallback for old GTK without option parsing
            if "-h" in sys.argv or "--help" in sys.argv:
                sys.stdout.write("Usage:\n")
                sys.stdout.write("  %s [arguments]\n" % (sys.argv[0],))
                sys.stdout.write("Arguments:\n")
                for o in self.arguments:
                    # Don't display hidden and unsupported parameters
                    if o.long_name not in ("force-update", "quit"):
                        sys.stdout.write("  -%s, --%s %s\n" % (chr(o.short_name), o.long_name.ljust(10), o.description))
                sys.exit(0)

            def is_option(name):
                # Emulating Gtk.Application.do_local_options
                for o in self.arguments:
                    if o.long_name == name:
                        if "-%s" % (chr(o.short_name),) in sys.argv:
                            return True
                        if "--%s" % (o.long_name,) in sys.argv:
                            return True
                return False

            self.parse_local_options(is_option)

        if self.daemon is None:
            if self.wizard is None:
                if self.setup_connection():
                    self.daemon.reconnect()
        self.activate()
        return 0

    def do_activate(self, *a):
        if self.hide_window:
            log.info("")
            log.info(_("Syncthing-GTK started and running in notification area"))
            if self.daemon is not None:
                self.daemon.set_refresh_interval(REFRESH_INTERVAL_TRAY)
        else:
            if self.wizard is None:
                # Show main window
                self.cb_statusicon_click()
        self.hide_window = False

    def setup_commandline(self):
        new_glib = GLib.glib_version >= (2, 40, 0)

        def aso(long_name, short_name, description, arg=GLib.OptionArg.NONE, flags=GLib.OptionFlags.IN_MAIN):
            """add_simple_option, adds program argument in simple way"""
            o = GLib.OptionEntry()
            o.long_name = long_name
            o.short_name = short_name
            o.description = description
            o.flags = flags
            o.arg = arg
            if new_glib:
                self.add_main_option_entries([o])
            else:
                self.arguments.append(o)

        if new_glib:
            # Guess who doesn't support option parsing...
            self.connect("handle-local-options", self.do_local_options)
        else:
            self.arguments = []
        aso("window", ord("w"), "Display window (don't start minimized)")
        aso("minimized", ord("m"), "Hide window (start minimized)")
        aso("header", ord("s"), "Use classic window header")
        aso("quit", ord("q"), "Quit running instance (if any)")
        aso("verbose", ord("v"), "Be verbose")
        aso("debug", ord("d"), "Be more verbose (debug mode)")
        aso("wizard", ord("1"), "Run 'first start wizard' and exit")
        aso("about", ord("a"), "Display about dialog and exit")
        aso("dump", ord("o"), "Redirect captured daemon output to stdout")
        aso("home", 0, "Overrides default syncthing configuration directory", GLib.OptionArg.STRING)
        aso("add-repo", 0, "Opens 'add repository' dialog with specified path prefilled", GLib.OptionArg.STRING)
        aso(
            "remove-repo",
            0,
            "If there is repository assigned with specified path, opens 'remove repository' dialog",
            GLib.OptionArg.STRING,
        )
        aso("no-status-icon", 0, "Don't show a tray status icon")
        aso(
            "force-update",
            0,
            "Force updater to download specific daemon version",
            GLib.OptionArg.STRING,
            GLib.OptionFlags.HIDDEN,
        )

    def setup_actions(self):
        def add_simple_action(name, callback):
            action = Gio.SimpleAction.new(name, None)
            action.connect("activate", callback)
            self.add_action(action)
            return action

        add_simple_action("webui", self.cb_menu_webui)
        add_simple_action("daemon_output", self.cb_menu_daemon_output).set_enabled(False)
        add_simple_action("preferences", self.cb_menu_ui_settings)
        add_simple_action("about", self.cb_about)
        add_simple_action("quit", self.cb_exit)

        add_simple_action("add_folder", self.cb_menu_add_folder)
        add_simple_action("add_device", self.cb_menu_add_device)
        add_simple_action("daemon_preferences", self.cb_menu_daemon_settings)
        add_simple_action("show_id", self.cb_menu_show_id)
        add_simple_action("daemon_shutdown", self.cb_menu_shutdown)
        add_simple_action("daemon_restart", self.cb_menu_restart)

    def setup_widgets(self):
        self.builder = UIBuilder()
        # Set conditions for UIBuilder
        if self.use_headerbar:
            self.builder.enable_condition("header_bar")
        if not self.use_headerbar:
            self.builder.enable_condition("traditional_header")
        if IS_WINDOWS:
            self.builder.enable_condition("is_windows")
        if IS_GNOME:
            self.builder.enable_condition("is_gnome")
        # Fix icon path
        self.builder.replace_icon_path("icons/", self.iconpath)
        # Load glade file
        self.builder.add_from_file(os.path.join(self.gladepath, "app.glade"))
        self.builder.connect_signals(self)
        # Dunno how to do this from glade
        if self.use_headerbar and IS_GNOME:
            self.set_app_menu(self["app-menu"])

        # Create speedlimit submenus for incoming and outcoming speeds
        L_MEH = [("menu-si-sendlimit", self.cb_menu_sendlimit), ("menu-si-recvlimit", self.cb_menu_recvlimit)]
        for limitmenu, eventhandler in L_MEH:
            submenu = self["%s-sub" % (limitmenu,)]
            for speed in SPEED_LIMIT_VALUES:
                menuitem = Gtk.CheckMenuItem(_("%s kB/s") % (speed,))
                item_id = "%s-%s" % (limitmenu, speed)
                menuitem.connect("activate", eventhandler, speed)
                self[item_id] = menuitem
                submenu.add(menuitem)
            self[limitmenu].show_all()

        if not self["edit-menu-icon"] is None:
            if not Gtk.IconTheme.get_default().has_icon(self["edit-menu-icon"].get_icon_name()[0]):
                # If requested icon is not found in default theme, replace it with emblem-system-symbolic
                self["edit-menu-icon"].set_from_icon_name(
                    "emblem-system-symbolic", self["edit-menu-icon"].get_icon_name()[1]
                )

        # Set window title in way that even Gnome can understand
        icon = os.path.join(self.iconpath, "syncthing-gtk.png")
        self["window"].set_title(_("Syncthing-GTK"))
        self["window"].set_wmclass("Syncthing GTK", "Syncthing GTK")
        if os.path.exists(icon):
            self["window"].set_icon(GdkPixbuf.Pixbuf.new_from_file(icon))
        self.add_window(self["window"])

    def setup_statusicon(self):
        if self.show_status_icon:
            self.statusicon = get_status_icon(self.iconpath, self["si-menu"])
        else:
            self.statusicon = StatusIconDummy(self.iconpath, self["si-menu"])

        self.statusicon.connect("clicked", self.cb_statusicon_click)
        self.statusicon.connect("notify::active", self.cb_statusicon_notify_active)
        self.cb_statusicon_notify_active()

    def setup_connection(self):
        # Create Daemon instance (loads and parses config)
        try:
            if self.home_dir_override:
                self.daemon = Daemon(os.path.join(self.home_dir_override, "config.xml"))
            else:
                self.daemon = Daemon()
        except InvalidConfigurationException as e:
            # Syncthing is not configured, most likely never launched.
            # Run wizard.
            if IS_XP:
                # Wizard can't run on old Windows versions. Instead of
                # it, 'Give me daemon executable' dialog is shown
                self.cb_daemon_startup_failed(
                    None, "Syncthing is not configured or configuration file cannot be found."
                )
                return False
            self.hide()
            self.show_wizard()
            return False
        except TLSErrorException as e:
            # This is pretty-much fatal. Display error message and bail out.
            self.cb_syncthing_con_error(self.daemon, Daemon.UNKNOWN, str(e), e)
            return False
        if HAS_DESKTOP_NOTIFY:
            if self.config["notification_for_update"] or self.config["notification_for_error"]:
                self.notifications = Notifications(self, self.daemon)
        # Connect signals
        self.daemon.connect("config-out-of-sync", self.cb_syncthing_config_oos)
        self.daemon.connect("config-saved", self.cb_syncthing_config_saved)
        self.daemon.connect("connected", self.cb_syncthing_connected)
        self.daemon.connect("connection-error", self.cb_syncthing_con_error)
        self.daemon.connect("disconnected", self.cb_syncthing_disconnected)
        self.daemon.connect("error", self.cb_syncthing_error)
        self.daemon.connect("config-loaded", self.cb_config_loaded)
        self.daemon.connect("folder-rejected", self.cb_syncthing_folder_rejected)
        self.daemon.connect("device-rejected", self.cb_syncthing_device_rejected)
        self.daemon.connect("my-id-changed", self.cb_syncthing_my_id_changed)
        self.daemon.connect("device-added", self.cb_syncthing_device_added)
        self.daemon.connect("device-data-changed", self.cb_syncthing_device_data_changed)
        self.daemon.connect("last-seen-changed", self.cb_syncthing_last_seen_changed)
        self.daemon.connect("device-connected", self.cb_syncthing_device_state_changed, True)
        self.daemon.connect("device-disconnected", self.cb_syncthing_device_state_changed, False)
        self.daemon.connect("device-paused", self.cb_syncthing_device_paused_resumed, True)
        self.daemon.connect("device-resumed", self.cb_syncthing_device_paused_resumed, False)
        self.daemon.connect("device-sync-started", self.cb_syncthing_device_sync_progress)
        self.daemon.connect("device-sync-progress", self.cb_syncthing_device_sync_progress)
        self.daemon.connect("device-sync-finished", self.cb_syncthing_device_sync_progress, 1.0)
        self.daemon.connect("folder-added", self.cb_syncthing_folder_added)
        self.daemon.connect("folder-error", self.cb_syncthing_folder_error)
        self.daemon.connect("folder-data-changed", self.cb_syncthing_folder_data_changed)
        self.daemon.connect("folder-data-failed", self.cb_syncthing_folder_state_changed, 0.0, COLOR_NEW, "")
        self.daemon.connect(
            "folder-sync-started", self.cb_syncthing_folder_state_changed, 0.0, COLOR_FOLDER_SYNCING, _("Syncing")
        )
        self.daemon.connect(
            "folder-sync-progress", self.cb_syncthing_folder_state_changed, COLOR_FOLDER_SYNCING, _("Syncing")
        )
        self.daemon.connect("folder-sync-finished", self.cb_syncthing_folder_up_to_date)
        self.daemon.connect(
            "folder-scan-started", self.cb_syncthing_folder_state_changed, 1.0, COLOR_FOLDER_SCANNING, _("Scanning")
        )
        self.daemon.connect(
            "folder-scan-progress", self.cb_syncthing_folder_state_changed, COLOR_FOLDER_SCANNING, _("Scanning")
        )
        self.daemon.connect("folder-scan-finished", self.cb_syncthing_folder_up_to_date)
        self.daemon.connect("folder-stopped", self.cb_syncthing_folder_stopped)
        self.daemon.connect("system-data-updated", self.cb_syncthing_system_data)
        return True

    def show_wizard(self):
        from syncthing_gtk.wizard import Wizard

        self.wizard = Wizard(self.gladepath, self.iconpath, self.config)
        self.wizard.connect("cancel", self.cb_wizard_finished)
        self.wizard.connect("close", self.cb_wizard_finished)
        self.wizard.show()

    def start_daemon_ui(self):
        """
        Does same thing as start_daemon.
        Additionally displays 'Starting Daemon' message and swaps
        menu items in notification icon menu.
        """
        # Swap menu items in notification menu
        self["menu-si-shutdown"].set_visible(True)
        self["menu-si-resume"].set_visible(False)
        # Display message
        self.close_connect_dialog()
        self.display_connect_dialog(_("Starting Syncthing daemon"))
        # Start daemon
        self.start_daemon()

    def start_daemon(self):
        if self.process is None:
            if IS_WINDOWS:
                from syncthing_gtk.windows import is_shutting_down

                if is_shutting_down():
                    log.warning("Not starting daemon: System shutdown detected")
                    return
            self.ct_process()
            self.lookup_action("daemon_output").set_enabled(True)
            self["menu-si-daemon-output"].set_sensitive(True)

    def ct_process(self):
        """
        Sets self.process, adds related handlers and starts daemon.
        Just so I don't have to write same code all over the place.
        """
        cmdline = [self.config["syncthing_binary"], "-no-browser"]
        vars, preargs, args = parse_config_arguments(self.config["syncthing_arguments"])
        cmdline = preargs + cmdline + args
        if self.home_dir_override:
            cmdline += ["-home", self.home_dir_override]

        self.process = DaemonProcess(cmdline, self.config["daemon_priority"], self.config["max_cpus"], env=vars)
        self.process.connect("failed", self.cb_daemon_startup_failed)
        self.process.connect("exit", self.cb_daemon_exit)
        if self.dump_daemon_output:
            self.process.connect("line", self.cb_daemon_line_captured)
        self.process.start()

    def ask_for_ur(self, *a):
        if self.ur_question_shown:
            # Don't ask twice until ST-GTK restart
            return
        markup = "".join(
            [
                "<b>%s</b>" % (_("Allow Anonymous Usage Reporting?"),),
                "\n",
                _("The encrypted usage report is sent daily."),
                " ",
                _("It is used to track common platforms, folder sizes and app versions."),
                " ",
                _("If the reported data set is changed you will be prompted with this dialog again."),
                "\n",
                _("The aggregated statistics are publicly available at"),
                " ",
                "<a href='https://data.syncthing.net'>https://data.syncthing.net.</a>",
                ".",
            ]
        )
        r = RIBar(markup, Gtk.MessageType.QUESTION)
        r.add_button(RIBar.build_button("gtk-yes", use_stock=True), RESPONSE_UR_ALLOW)
        r.add_button(RIBar.build_button("gtk-no", use_stock=True), RESPONSE_UR_FORBID)
        self.show_info_box(r)

        self.ur_question_shown = True
        # User response is handled in App.cb_infobar_response

    def check_for_upgrade(self, *a):
        self.cancel_timer("updatecheck")
        if not self.config["st_autoupdate"]:
            # Disabled, don't even bother
            log.info("updatecheck: disabled")
            return
        if self.process is None:
            # Upgrading if executable is not launched by Syncthing-GTK
            # may fail in too many ways.
            log.warning("Skipping updatecheck: Daemon not launched by me")
            return
        if self.force_update_version is None:
            if (datetime.now() - self.config["last_updatecheck"]).total_seconds() < UPDATE_CHECK_INTERVAL:
                # Too soon, check again in 10 minutes
                self.timer("updatecheck", 60 * 10, self.check_for_upgrade)
                log.info("updatecheck: too soon")
                return
        log.info("Checking for updates...")
        # Prepare
        target = "%s.new" % (self.config["syncthing_binary"],)
        # Check for write access to parent directory
        if not can_upgrade_binary(self.config["syncthing_binary"]):
            self.cb_syncthing_error(None, "Warning: No write access to daemon binary; Skipping update check.")
            return
        # Determine platform
        suffix, tag = StDownloader.determine_platform()
        if suffix is None or tag is None:
            # Shouldn't really happen at this point
            log.warning("Cannot update: Unsupported platform")
            return

        # Define callbacks
        # Define callbacks
        def cb_cu_error(sd, e, message):
            # Version check failed. Try it again later
            if "WinHttp" in str(e) and "SECURE_FAILURE" in str(e) and self["infobar"] is None:
                message = _(
                    "Your Windows version doesn't supports cryptographic standards needed\n"
                    "for Syncthing-GTK to check for Syncthing updates.\n"
                    "Please, install <a href='%(url)s'>this Windows update</a> or disable update feature."
                ) % {"url": "https://support.microsoft.com/en-us/help/3140245/"}
                r = RIBar(message, Gtk.MessageType.WARNING)
                self["infobar"] = r
                self.show_info_box(r)
            else:
                self.timer("updatecheck", 1 * 60 * 60, self.check_for_upgrade)

        def cb_cu_progress(sd, progress, pb):
            pb.set_fraction(progress)

        def cb_cu_extract_start(sd, l, pb):
            l.set_text(_("Extracting update..."))
            pb.set_fraction(0.0)

        def cb_cu_extract_finished(sd, r, l, pb):
            pb.hide()
            l.set_text(_("Restarting daemon..."))
            if self.daemon.is_connected():
                self.daemon.restart()
            else:
                # Happens when updating from unsupported version
                if self.process is not None:
                    self.process.kill()
                else:
                    self.start_daemon()
                    self.set_status(False)
                    self.restart()
            self.timer(None, 2, r.close)

        def cb_cu_download_fail(sd, exception, message, r):
            log.error("Download failed: %s", exception)
            r.close()
            self.cb_syncthing_error(None, _("Failed to download upgrade: %s") % (message))
            return cb_cu_error()

        def cb_cu_version(sd, version):
            needs_upgrade = False
            try:
                needs_upgrade = not compare_version(self.daemon.get_version(), version)
            except Exception:
                # May happen if connection to daemon is lost while version
                # check is running
                return cb_cu_error()
            if self.force_update_version is not None:
                needs_upgrade = True
                self.force_update_version = None
            log.info("Updatecheck: needs_upgrade = %s", needs_upgrade)
            self.config["last_updatecheck"] = datetime.now()
            if needs_upgrade:
                pb = Gtk.ProgressBar()
                l = Gtk.Label(_("Downloading Syncthing %s") % (version,))
                l.set_alignment(0, 0.5)
                box = Gtk.VBox()
                box.pack_start(l, True, True, 0)
                box.pack_start(pb, False, True, 1)
                box.show_all()
                r = RIBar(box, Gtk.MessageType.INFO)
                r.disable_close_button()
                self.show_info_box(r)
                sd.connect("error", cb_cu_download_fail, r)
                sd.connect("download-progress", cb_cu_progress, pb)
                sd.connect("extraction-progress", cb_cu_progress, pb)
                sd.connect("download-finished", cb_cu_extract_start, l, pb)
                sd.connect("extraction-finished", cb_cu_extract_finished, r, l, pb)
                sd.download()
            else:
                # No upgrade is needed. Schedule another check on later time
                self.timer("updatecheck", UPDATE_CHECK_INTERVAL, self.check_for_upgrade)

        # Check version
        sd = StDownloader(target, tag)
        sd.connect("error", cb_cu_error)
        sd.connect("version", cb_cu_version)
        if self.force_update_version is None:
            sd.get_version()
        else:
            sd.force_version(self.force_update_version)

    def swap_updated_binary(self):
        """
        Switches newly downloaded binary with old one.
        Called while daemon is restarting after upgrade is downloaded.
        """
        log.info("Found .new file, updating daemon binary")
        bin = self.config["syncthing_binary"]
        old_bin = bin + ".old"
        new_bin = bin + ".new"
        # Move old from way
        try:
            shutil.move(bin, old_bin)
        except Exception as e:
            log.warning("Failed to upgrade daemon binary: Failed to rename old binary")
            log.warning(e)
            return
        # Place new
        try:
            shutil.move(new_bin, bin)
        except Exception as e:
            log.warning("Failed to upgrade daemon binary: Failed to rename new binary")
            log.warning(e)
            # Return old back to place
            try:
                shutil.move(old_bin, bin)
            except Exception as e:
                # This really shouldn't happen, in more than one sense
                log.error("Failed to upgrade daemon binary: Failed to rename backup")
                log.exception(e)
            return
        # Remove old
        try:
            os.unlink(old_bin)
        except Exception as e:
            # Not exactly fatal
            log.warning("Failed to remove backup binary during backup")
            log.warning(e)

    def cb_syncthing_connected(self, *a):
        self.clear()
        self.close_connect_dialog()
        self.set_status(True)
        self["edit-menu-button"].set_sensitive(True)
        self["menu-si-shutdown"].set_sensitive(True)
        self["menu-si-show-id"].set_sensitive(True)
        self["menu-si-recvlimit"].set_sensitive(True)
        self["menu-si-sendlimit"].set_sensitive(True)
        if IS_WINDOWS and not self.use_headerbar:
            # Stupid way to reconfigure window content and keep windows
            # decorations visible on Windows
            r = RIBar(_("Connected to Syncthing daemon"), Gtk.MessageType.INFO)
            self.show_info_box(r)
            self.cb_infobar_close(r)

    def cb_syncthing_disconnected(self, daemon, reason, message):
        # if reason == Daemon.UNEXPECTED
        message = "%s %s" % (
            _("Connection to Syncthing daemon lost."),
            _("Syncthing is probably restarting or has been shut down."),
        )
        if reason == Daemon.SHUTDOWN:
            message = _("Syncthing has been shut down.")
            self["menu-si-shutdown"].set_visible(False)
            self["menu-si-resume"].set_visible(True)
        elif reason == Daemon.RESTART:
            message = "%s %s..." % (_("Syncthing is restarting."), _("Please wait"))
        self.display_connect_dialog(message, quit_button=reason != Daemon.RESTART)
        if reason == Daemon.SHUTDOWN:
            # Add 'Start daemon again' button to dialog
            self.connect_dialog.add_button("Start Again", RESPONSE_START_DAEMON)
        elif reason == Daemon.RESTART:
            # Nothing, just preventing next branch from running
            pass
        elif IS_WINDOWS and self.process is not None:
            # Restart daemon process if connection is lost on Windows
            self.process.kill()
            self.process = None
            self.start_daemon()
        self.set_status(False)
        self.restart()

    def cb_syncthing_con_error(self, daemon, reason, message, exception):
        if reason == Daemon.REFUSED:
            # If connection is refused, handler just displays dialog with "please wait" message
            # and lets Daemon object to retry connection
            if self.connect_dialog is None:
                if check_daemon_running():
                    # Daemon is running, wait for it
                    self.display_connect_dialog(
                        _("Connecting to Syncthing daemon at %s...") % (self.daemon.get_webui_url(),)
                    )
                else:
                    # Daemon is probably not there, give user option to start it
                    if self.config["autostart_daemon"] == 0:
                        # ... unless he already decided once forever ...
                        self.display_connect_dialog(
                            _("Waiting for Syncthing daemon at %s...") % (self.daemon.get_webui_url(),)
                        )
                    elif self.config["autostart_daemon"] == 1:
                        # ... or already gave permission ...
                        self.display_connect_dialog(_("Starting Syncthing daemon"))
                        self.start_daemon()
                    else:
                        self.display_run_daemon_dialog()
            self.set_status(False)
        elif reason == Daemon.OLD_VERSION and self.config["st_autoupdate"] and self.process is not None:
            # Daemon is too old, but autoupdater is enabled and I have control of deamon.
            # Try to update.
            from .configuration import LONG_AGO

            self.config["last_updatecheck"] = LONG_AGO
            self.restart_after_update = True
            self.close_connect_dialog()
            self.display_connect_dialog(
                _("Your syncthing daemon is too old.") + "\n" + _("Attempting to download recent, please wait...")
            )
            self.set_status(False)
            self.check_for_upgrade()
        else:
            # All other errors are fatal for now. Error dialog is displayed and program exits.
            if reason == Daemon.NOT_AUTHORIZED:
                message = _(
                    "Cannot authorize with daemon. Please, use WebUI to generate API key or disable password authentication."
                )
            elif reason == Daemon.OLD_VERSION:
                message = _(
                    "Your syncthing daemon is too old.\nPlease, upgrade syncthing package at least to version %s and try again."
                ) % (self.daemon.get_min_version(),)
            elif reason == Daemon.TLS_UNSUPPORTED:
                message = _(
                    "Sorry, connecting to HTTPS is not supported on this platform.\nPlease, use WebUI to disable HTTPS try again."
                )
            else:  # Daemon.UNKNOWN
                message = "%s\n\n%s %s" % (
                    _("Connection to daemon failed. Check your configuration and try again."),
                    _("Error message:"),
                    str(message),
                )
                if "Not found" in str(message):
                    # Special case that has usual explanation
                    message = "%s\n%s" % (
                        message,
                        _("Possible cause: Is there another web server running on Syncthing port?"),
                    )
            d = Gtk.MessageDialog(
                self["window"],
                Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
                Gtk.MessageType.ERROR,
                Gtk.ButtonsType.CLOSE,
                message,
            )
            if exception is not None and hasattr(exception, "full_response"):
                # Anything derived from HTTPError, where full server
                # response is attached
                ex = Gtk.Expander(label=_("More info"))
                tbuf = Gtk.TextBuffer()
                try:
                    tbuf.set_text("Server response:\n'%s'" % (exception.full_response,))
                except Exception:
                    # May happen when full_response can't be decoded
                    try:
                        tbuf.set_text("Server response:\n'%s'" % ((exception.full_response,),))
                    except Exception:
                        # Shouldn't really happen
                        tbuf.set_text("<unparsable mess of data>")
                tview = Gtk.TextView(buffer=tbuf)
                swin = Gtk.ScrolledWindow()
                swin.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
                swin.add_with_viewport(tview)
                swin.set_size_request(300, 400)
                ex.add(swin)
                d.get_message_area().pack_end(ex, True, True, 1)
                ex.show_all()
            d.run()
            d.hide()
            d.destroy()
            self.quit()

    def cb_syncthing_config_oos(self, *a):
        if self["infobar"] is None:
            r = RIBar(
                _(
                    "The configuration has been saved but not activated.\nSyncthing must restart to activate the new configuration."
                ),
                Gtk.MessageType.WARNING,
                (RIBar.build_button(_("_Restart"), "view-refresh"), RESPONSE_RESTART),
            )
            self["infobar"] = r
            self.show_info_box(r)

    def cb_syncthing_config_saved(self, *a):
        # Refresh daemon data from UI
        log.debug("Config saved")
        self.refresh()

    def cb_config_loaded(self, daemon, config):
        # Called after connection to daemon is initialized;
        # Used to change indicating UI components
        self.recv_limit = config["options"]["maxRecvKbps"]
        self.send_limit = config["options"]["maxSendKbps"]
        L_MEV = [("menu-si-sendlimit", self.send_limit), ("menu-si-recvlimit", self.recv_limit)]

        for limitmenu, value in L_MEV:
            other = True
            for speed in [0] + SPEED_LIMIT_VALUES:
                menuitem = self["%s-%s" % (limitmenu, speed)]
                menuitem.set_active(speed == value)
                if speed == value:
                    other = False
            self["%s-other" % (limitmenu,)].set_active(other)

        if config["options"]["urAccepted"] == 0:
            # User did not responded to usage reporting yet. Ask
            self.ask_for_ur()

        if "use_inotify" in self.config:
            from syncthing_gtk.configuration import migrate_fs_watch

            if migrate_fs_watch(self.config, config):
                self.daemon.write_config(config, lambda *a: False)
                self.config.save()
                log.info("Filesystem watcher configuration migrated")

    def cb_syncthing_error(self, daemon, message):
        """Handles errors reported by syncthing daemon"""
        # Daemon argument is not used
        RE_IP_PORT = re.compile(r"([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+):([0-9]+)")
        if "remote device speaks an older version of the protocol" in message:
            # This one needs special treatment because remote port changes
            # every time when this is reported.
            id = re.search("to ([-0-9A-Za-z]+)", message)
            version = re.search("protocol \(([^\)]+)\)", message)
            if not id or not version:
                # Invalid format
                return
            id = display_id = id.group(1)
            version = version.group(1)
            if id in self.devices:
                device = self.devices[id]
                display_id = device.get_title()
                device.set_color_hex(COLOR_DEVICE_ERROR)
                device.set_status(_("Incompatible"), 0)
                device.show_value("version")
                device["version"] = version

            message = _(
                "Connecting to <b>%s</b> failed; the remote device speaks an older version of the protocol (%s) not compatible with this version"
            ) % (display_id, version)
        while RE_IP_PORT.search(message):
            # Strip any IP:port pairs in message to only IP. Port usually
            # changes with each error message
            ip, port = RE_IP_PORT.search(message).groups()
            message = message.replace("%s:%s" % (ip, port), ip)
        if message in self.error_messages:
            # Same error is already displayed
            log.info("(repeated) %s", message)
            return
        log.info(message)
        if "Unexpected folder ID" in message:
            # Handled by event, don't display twice
            return
        severity = Gtk.MessageType.WARNING
        if "Stopping folder" in message:
            severity = Gtk.MessageType.ERROR
        self.error_messages.add(message)
        bar = RIBar(message, severity)
        bar.connect("response", self.cb_error_response, message)
        self.show_error_box(bar)

    def cb_error_response(self, bar, response, message):
        # Remove closed error message from self.error_messages list,
        # so it can re-appear
        if message in self.error_messages:
            self.error_messages.remove(message)

    def cb_syncthing_folder_rejected(self, daemon, nid, rid, label):
        if (nid, rid) in self.error_messages:
            # Store as error message and don't display twice
            return
        self.error_messages.add((nid, rid))
        device, can_fix = nid, False
        if nid in self.devices:
            device = self.devices[nid].get_title()
            can_fix = True
        markup = _('%(device)s wants to share folder "%(folder)s". Add new folder?') % {
            "device": "<b>%s</b>" % device,
            "folder": "<b>%s</b>" % (label or rid),
        }
        r = RIBar(
            "",
            Gtk.MessageType.WARNING,
        )
        r.get_label().set_markup(markup)
        if can_fix:
            r.add_button(RIBar.build_button(_("_Ignore")), RESPONSE_FIX_IGNORE_FOLDER)
            r.add_button(RIBar.build_button(_("_Add")), RESPONSE_FIX_ADD_FOLDER)
        self.show_error_box(r, {"nid": nid, "rid": rid, "label": label})

    def cb_syncthing_device_rejected(self, daemon, nid, name, address):
        # Remove port from address, it's random by default anyway
        if "[" in address:
            # IPv6 address
            address = address.split("]:")[0] + "]"
        else:
            # IPv4
            address = address.split(":")[0]
        if (nid, address) in self.error_messages:
            # Store as error message and don't display twice
            return
        self.error_messages.add((nid, address))
        markup = _('Device "<b>%(name)s</b>" (%(device)s) at IP "<b>%(ip)s</b>" wants to connect. Add new device?') % {
            "name": name,
            "device": "<b>%s</b>" % nid,
            "ip": "<b>%s</b>" % address,
        }
        r = RIBar(
            "",
            Gtk.MessageType.WARNING,
        )
        r.get_label().set_markup(markup)
        r.add_button(RIBar.build_button(_("_Add")), RESPONSE_FIX_ADD_DEVICE)
        r.add_button(RIBar.build_button(_("_Ignore")), RESPONSE_FIX_IGNORE_DEV)
        self.show_error_box(r, {"nid": nid, "name": name, "address": address})

    def cb_syncthing_my_id_changed(self, daemon, device_id):
        if device_id in self.devices:
            device = self.devices[device_id]
            # Move my device to top
            self["devicelist"].reorder_child(device, 0)
            # Modify header & color
            device.set_status("")
            device.invert_header(True)
            device.set_color_hex(COLOR_OWN_DEVICE)
            if self.use_headerbar:
                self["header"].set_subtitle(device.get_title())
            else:
                self["server-name"].set_markup("<b>%s</b>" % (device.get_title(),))
            # Modify values
            device.clear_values()
            device.add_value("ram", "ram.svg", _("RAM Utilization"), "")
            device.add_value("cpu", "cpu.svg", _("CPU Utilization"), "")
            device.add_value("inbps", "dl_rate.svg", _("Download Rate"), "0 B/s (0 B)")
            device.add_value("outbps", "up_rate.svg", _("Upload Rate"), "0 B/s (0 B)")
            device.add_value("announce", "announce.svg", _("Announce Server"), "")
            device.add_value("version", "version.svg", _("Version"), None)
            device.show_all()
            # Expand my own device box right after startup
            if self.devices_never_loaded:
                self.open_boxes.add(device["id"])
                device.set_open(True)
                self.devices_never_loaded = True
            # Remove my own device from "Shared with" value in all shared directories
            # ( https://github.com/syncthing/syncthing/issues/915 )
            for folder in self.folders:
                f = self.folders[folder]
                if device in f["devices"]:
                    f["shared"] = ", ".join([n.get_title() for n in f["devices"] if n != device])
            # Check for new version, if enabled
            self.check_for_upgrade()

    def cb_syncthing_system_data(self, daemon, mem, cpu, d_failed, d_total):
        if self.daemon.get_my_id() in self.devices:
            # Update my device display
            device = self.devices[self.daemon.get_my_id()]
            device["ram"] = sizeof_fmt(mem)
            device["cpu"] = "%3.2f%%" % (cpu)
            if d_total == 0:
                device["announce"] = _("disabled")
            else:
                device["announce"] = "%s/%s" % (d_total - d_failed, d_total)

    def cb_syncthing_device_added(self, daemon, nid, name, used, data):
        self.show_device(nid, name, data["compression"], data["introducer"] if "introducer" in data else False, used)

    def cb_syncthing_device_data_changed(self, daemon, nid, address, client_version, inbps, outbps, inbytes, outbytes):
        if nid in self.devices:  # Should be always
            device = self.devices[nid]
            # Update strings
            device["address"] = address
            if client_version not in ("?", None):
                device["version"] = client_version
            # Update rates
            device["inbps"] = "%s/s (%s)" % (sizeof_fmt(inbps), sizeof_fmt(inbytes))
            device["outbps"] = "%s/s (%s)" % (sizeof_fmt(outbps), sizeof_fmt(outbytes))

    def cb_syncthing_last_seen_changed(self, daemon, nid, dt):
        if nid in self.devices:  # Should be always
            device = self.devices[nid]
            if dt is None:
                device["last-seen"] = _("Never")
            else:
                dtf = dt.strftime("%Y-%m-%d %H:%M")
                device["last-seen"] = str(dtf)

    def cb_syncthing_device_paused_resumed(self, daemon, nid, paused):
        if nid in self.devices:  # Should be always
            device = self.devices[nid]
            device.set_status(_("Paused") if paused else _("Disconnected"))
            device.set_color_hex(COLOR_DEVICE_OFFLINE)
            device["online"] = False
            device["connected"] = False
            # Update visible values
            device.hide_values("sync", "inbps", "outbps", "version")
            device.show_values("last-seen")
        self.update_folders()
        self.set_status(True)

    def cb_syncthing_device_state_changed(self, daemon, nid, connected):
        if nid in self.devices:  # Should be always
            device = self.devices[nid]
            if device["connected"] != connected:
                device["connected"] = connected
                if connected:
                    # Update color & header
                    device.set_status(_("Connected"))
                    device.set_color_hex(COLOR_DEVICE_CONNECTED)
                    device["online"] = True
                    # Update visible values
                    device.show_values("sync", "inbps", "oubps", "version")
                    device.hide_values("last-seen")
                else:
                    # Update color & header
                    device.set_status(_("Disconnected"))
                    device.set_color_hex(COLOR_DEVICE_OFFLINE)
                    device["online"] = False
                    # Update visible values
                    device.hide_values("sync", "inbps", "outbps", "version")
                    device.show_values("last-seen")
        self.update_folders()
        self.set_status(True)

    def cb_syncthing_device_sync_progress(self, daemon, device_id, sync):
        if device_id in self.devices:
            device = self.devices[device_id]
            device["sync"] = "%3.f%%" % (sync * 100.0)
            if not device["connected"]:
                device.set_color_hex(COLOR_DEVICE_OFFLINE)
                device.set_status(_("Disconnected"))
            elif sync >= 0.0 and sync < 0.99:
                device.set_color_hex(COLOR_DEVICE_SYNCING)
                device.set_status(_("Syncing"), sync)
            else:
                device.set_color_hex(COLOR_DEVICE_CONNECTED)
                device.set_status(_("Up to Date"))

    def cb_syncthing_folder_added(self, daemon, rid, r):
        self.show_folder(
            rid,
            r["label"],
            r["path"],
            r["type"],
            r["ignorePerms"],
            r["rescanIntervalS"],
            r["fsWatcherEnabled"],
            sorted(
                [self.devices[n["deviceID"]] for n in r["devices"] if n["deviceID"] in self.devices],
                key=lambda x: x.get_title().lower(),
            ),
        )

    def cb_syncthing_folder_data_changed(self, daemon, rid, data):
        if rid in self.folders:  # Should be always
            folder = self.folders[rid]
            global_files = data["globalFiles"] + data["globalSymlinks"]
            local_files = data["localFiles"] + data["localSymlinks"]
            need_files = data["needFiles"] + data["needSymlinks"] + data.get("receiveOnlyTotalItems", 0)
            need_bytes = data["needBytes"] + data.get("receiveOnlyChangedBytes", 0)
            folder["global"] = "%s %s, %s" % (global_files, _("Files"), sizeof_fmt(data["globalBytes"]))
            folder["local"] = "%s %s, %s" % (local_files, _("Files"), sizeof_fmt(data["localBytes"]))
            folder["oos"] = "%s %s, %s" % (need_files, _("Files"), sizeof_fmt(need_bytes))
            if folder["folder_type_s"] in ("sendonly", "receiveonly"):
                can_override = need_files > 0
                if can_override != folder["can_override"]:
                    folder["can_override"] = can_override
                    folder["override_title"] = (
                        _("Cluster out of sync") if folder["folder_type_s"] == "sendonly" else _("Local changes")
                    )
                    self.cb_syncthing_folder_up_to_date(None, rid)

    def cb_syncthing_folder_up_to_date(self, daemon, rid):
        if rid in self.folders:  # Should be always
            folder = self.folders[rid]
            title = _("Up to Date")
            if folder["can_override"]:
                title = folder["override_title"]
            self.cb_syncthing_folder_state_changed(daemon, rid, 1.0, COLOR_FOLDER_IDLE, title)

    def cb_syncthing_folder_state_changed(self, daemon, rid, percentage, color, text):
        if rid in self.folders:  # Should be always
            folder = self.folders[rid]
            folder.set_color_hex(color)
            folder.set_status(text, percentage)
            self.update_folders()
            self.set_status(True)

    def cb_syncthing_folder_stopped(self, daemon, rid, message):
        if rid in self.folders:  # Should be always
            folder = self.folders[rid]
            folder.set_color_hex(COLOR_FOLDER_STOPPED)
            folder.set_status(_("Stopped"), 0)
            # Color, theme-based icon is used here. It's intentional and
            # supposed to draw attention
            folder.add_value("error", "dialog-error", _("Error"), message)
            folder.show_value("error")

    def cb_syncthing_folder_error(self, daemon, rid, errors):
        if rid in self.folders:  # Should be always
            folder = self.folders[rid]
            message = "%(path)s: %(error)s" % errors[-1]
            folder.add_value("error", "dialog-error", _("Error"), message)
            folder.show_value("error")

    def any_device_online(self):
        """
        Returns True if there is at least one device connected to daemon
        """
        for box in list(self.devices.values()):
            if box["online"] and box["id"] != self.daemon.get_my_id():
                return True
        return False

    def set_status(self, is_connected):
        """Sets icon and text on first line of popup menu"""
        if is_connected:
            if self.daemon.syncing():
                # Daemon is online and at work
                sr = self.daemon.get_syncing_list()
                if len(sr) == 1:
                    self["menu-si-status"].set_label(_("Synchronizing '%s'") % (sr[0],))
                else:
                    self["menu-si-status"].set_label(_("Synchronizing %s folders") % (len(sr),))
                self.animate_status()
            elif self.any_device_online():
                # Daemon is online and idle
                self.statusicon.set("si-%s-idle" % (self.config["icon_theme"],), _("Up to Date"))
                self["menu-si-status"].set_label(_("Up to Date"))
                self.cancel_timer("icon")
            else:
                # Daemon is online, but there is no remote device connected
                self.statusicon.set("si-%s-unknown" % (self.config["icon_theme"],), _("All devices offline"))
                self["menu-si-status"].set_label(_("All devices offline"))
                self.cancel_timer("icon")
        else:
            # Still connecting to syncthing daemon
            self.statusicon.set("si-%s-unknown" % (self.config["icon_theme"],), _("Connecting to Syncthing daemon..."))
            self["menu-si-status"].set_label(_("Connecting to Syncthing daemon..."))
            self.cancel_timer("icon")

    def animate_status(self):
        """Handles icon animation"""
        if self.timer_active("icon"):
            # Already animating
            return
        self.statusicon.set(
            "si-%s-%s"
            % (
                self.config["icon_theme"],
                self.sync_animation,
            )
        )
        if self.config["animate_icon"]:
            self.sync_animation += 1
            if self.sync_animation >= SI_FRAMES:
                self.sync_animation = 0
            self.timer("icon", 0.1, self.animate_status)

    def update_folders(self):
        """
        Sets status of any 'idle' folder that has no devices online to
        'offline' and back if one of devices got connected.
        """
        for rid in self.folders:
            online = False
            folder = self.folders[rid]
            for device in folder["devices"]:
                online = online or device["online"]
            if online and folder.compare_color_hex(COLOR_FOLDER_OFFLINE):
                # Folder was marked as offline but is back online now
                if folder["can_override"]:
                    folder.set_status(folder["override_title"])
                else:
                    folder.set_status(_("Up to Date"))
                folder.set_color_hex(COLOR_FOLDER_IDLE)
            elif not online and folder.compare_color_hex(COLOR_FOLDER_SCANNING):
                # Folder is offline and in Scanning state
                folder.set_color_hex(COLOR_FOLDER_OFFLINE)
            elif not online and folder.compare_color_hex(COLOR_FOLDER_IDLE):
                # Folder is offline and in Idle state (not scanning)
                if len([d for d in folder["devices"] if d["id"] != self.daemon.get_my_id()]) == 0:
                    # No device to share folder with
                    folder.set_status(_("Unshared"))
                else:
                    # Folder is shared, but all devices are offline
                    folder.set_status(_("Offline"))
                folder.set_color_hex(COLOR_FOLDER_OFFLINE)

    def show_error_box(self, ribar, additional_data={}):
        self.show_info_box(ribar, additional_data)
        self.error_boxes.append(ribar)

    def show_info_box(self, ribar, additional_data=None):
        self["content"].pack_start(ribar, False, False, 0)
        self["content"].reorder_child(ribar, 0 if self.use_headerbar else 1)
        ribar.connect("close", self.cb_infobar_close)
        ribar.connect("response", self.cb_infobar_response, additional_data)
        ribar.show()
        ribar.set_reveal_child(True)

    def fatal_error(self, text):
        # TODO: Better way to handle this
        log.error(text)
        d = Gtk.MessageDialog(
            None,
            Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
            Gtk.MessageType.ERROR,
            Gtk.ButtonsType.CLOSE,
            text,
        )
        d.run()
        d.hide()
        d.destroy()
        self.quit()

    def get_folder_n_path(self, path):
        """
        Returns tuple of ID of folder containing specified path and
        relative path in that folder, or (None, None) if specified path
        doesn't belongs anywhere
        """
        for folder_id in self.folders:
            f = self.folders[folder_id]
            relpath = os.path.relpath(path, f["norm_path"])
            if not relpath.startswith("../") and relpath != "..":
                return (folder_id, relpath)
        return (None, None)

    def __getitem__(self, name):
        """Convince method that allows widgets to be accessed via self["widget"]"""
        if name in self.widgets:
            return self.widgets[name]
        return self.builder.get_object(name)

    def __setitem__(self, name, item):
        """Convince method that allows widgets to be accessed via self["widget"]"""
        self.widgets[name] = item

    def __contains__(self, name):
        """Returns True if there is such widget"""
        if name in self.widgets:
            return True
        return self.builder.get_object(name) is not None

    def hilight(self, boxes):
        to_hilight = set()
        for box in boxes:
            if box["id"] in self.folders:
                for d in box["devices"]:
                    if d["id"] != self.daemon.get_my_id():
                        to_hilight.add(d)
                to_hilight.add(box)
            if box["id"] in self.devices and box["id"] != self.daemon.get_my_id():
                for f in list(self.folders.values()):
                    if box in f["devices"]:
                        to_hilight.add(f)
                to_hilight.add(box)
        for box in itertools.chain(list(self.devices.values()), list(self.folders.values())):
            box.set_hilight(box in to_hilight)

    def is_visible(self):
        """Returns True if main window is visible"""
        return self["window"].is_visible()

    def show(self):
        """
        Shows main window or brings it to front, if is already visible.
        If connection to daemon is not established, shows 'Connecting'
        dialog as well.
        """
        if self.daemon is not None:
            self.daemon.set_refresh_interval(REFRESH_INTERVAL_DEFAULT)
            self.daemon.request_events()
        if not self["window"].is_visible():
            self["window"].show()
            if IS_WINDOWS and not self.config["window_position"] is None:
                scr = Gdk.Screen.get_default()
                self.config["window_position"] = (
                    min(self.config["window_position"][0], scr.width() - 300),
                    min(self.config["window_position"][1], scr.height() - 100),
                )
                self["window"].move(*self.config["window_position"])
            if self.connect_dialog is not None:
                self.connect_dialog.show()
        else:
            self["window"].present()
        self["menu-si-show"].set_label(_("Hide Window"))

    def hide(self):
        """Hides main windows and 'Connecting' dialog, if displayed"""
        if self.connect_dialog is not None:
            self.connect_dialog.hide()
        if IS_WINDOWS:
            x, y = self["window"].get_position()
            if x < 0:
                x = 0
            if y < 0:
                y = 0
            # Yes, it is possible for window to have negative position
            # on Windows...
            self.config["window_position"] = (x, y)
        self["window"].hide()
        self["menu-si-show"].set_label(_("Show Window"))
        if self.daemon is not None:
            self.daemon.set_refresh_interval(REFRESH_INTERVAL_TRAY)

    def display_connect_dialog(self, message, quit_button=True):
        """
        Displays 'Be patient, i'm trying to connect here' dialog, or updates
        it's message if said dialog is already displayed.
        """
        if self.connect_dialog is None:
            log.debug("Creating connect_dialog")
            self.connect_dialog = Gtk.MessageDialog(
                self["window"],
                Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
                Gtk.MessageType.INFO,
                0,
                "-",
            )
            if quit_button:
                self.connect_dialog.add_button("gtk-quit", RESPONSE_QUIT)
            # There is only one response available on this dialog
            self.connect_dialog.connect("response", self.cb_connect_dialog_response, None)
            if self.is_visible():
                self.connect_dialog.show_all()

        def set_label(d, message):
            """
            Small, recursive helper function to set label somehwere
            deep in dialog
            """
            for c in d.get_children():
                if isinstance(c, Gtk.Container):
                    if set_label(c, message):
                        return True
                elif isinstance(c, Gtk.Label):
                    c.set_markup(message)
                    return True
            return False

        log.verbose("Setting connect_dialog label %s" % message[0:15])
        set_label(self.connect_dialog.get_content_area(), message)

    def display_run_daemon_dialog(self):
        """
        Displays 'Syncthing is not running, should I start it for you?'
        dialog.
        """
        if self.connect_dialog is None:  # Don't override already existing dialog
            log.debug("Creating run_daemon_dialog")
            self.connect_dialog = Gtk.MessageDialog(
                self["window"],
                Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
                Gtk.MessageType.INFO,
                0,
                "%s\n%s" % (_("Syncthing daemon doesn't appear to be running."), _("Start it now?")),
            )
            cb = Gtk.CheckButton(_("Always start daemon automatically"))
            self.connect_dialog.get_content_area().pack_end(cb, False, False, 2)
            self.connect_dialog.add_button("_Start", RESPONSE_START_DAEMON)
            self.connect_dialog.add_button("gtk-quit", RESPONSE_QUIT)
            # There is only one response available on this dialog
            self.connect_dialog.connect("response", self.cb_connect_dialog_response, cb)
            if self.is_visible():
                self.connect_dialog.show_all()
            else:
                cb.show()  # Keep this one visible, even if dialog is not
            # Update notification icon menu so user can start daemon from there
            self["menu-si-shutdown"].set_visible(False)
            self["menu-si-resume"].set_visible(True)

    def close_connect_dialog(self):
        if self.connect_dialog is not None:
            self.connect_dialog.hide()
            self.connect_dialog.destroy()
            self.connect_dialog = None

            if IS_WINDOWS:
                # Force windows position on Windows - GTK 3.18 moves
                # window to corner when connect_dialog disappears for
                # some unexplainable reason
                x, y = self["window"].get_position()

                def move_back():
                    self["window"].move(x, y)

                GLib.idle_add(move_back)

    def show_folder(
        self, folder_id, label, path, folder_type, ignore_perms, rescan_interval, fswatcher_enabled, shared
    ):
        """Shared is expected to be list"""
        assert not isinstance(folder_type, bool)
        display_path = path
        if IS_WINDOWS:
            if display_path.lower().replace("\\", "/").startswith(os.path.expanduser("~").lower()):
                display_path = "~%s" % display_path[len(os.path.expanduser("~")) :]
        title = folder_id
        if self.config["folder_as_path"]:
            title = display_path
        if label not in (None, ""):
            title = label
        if folder_id in self.folders:
            # Reuse existing box
            box = self.folders[folder_id]
            box.set_title(title)
        else:
            # Create new box
            box = InfoBox(self, title, Gtk.Image.new_from_icon_name("drive-harddisk", Gtk.IconSize.LARGE_TOOLBAR))
            # Add visible lines
            box.add_value("id", "version.svg", _("Folder ID"), folder_id)
            box.add_value("path", "folder.svg", _("Path"))
            box.add_value("global", "global.svg", _("Global State"), "? items, ?B")
            box.add_value("local", "home.svg", _("Local State"), "? items, ?B")
            box.add_value("oos", "dl_rate.svg", _("Out Of Sync"), "? items, ?B")
            box.add_value("folder_type", "lock.svg", _("Folder Type"))
            box.add_value("ignore", "ignore.svg", _("Ignore Permissions"))
            box.add_value("rescan", "rescan.svg", _("Rescan Interval"))
            box.add_value("shared", "shared.svg", _("Shared With"))
            # Add hidden stuff
            box.add_hidden_value("folder_type_s", folder_type)
            box.add_hidden_value("override_title", "")
            box.add_hidden_value("can_override", False)
            box.add_hidden_value("devices", shared)
            box.add_hidden_value("norm_path", os.path.abspath(os.path.expanduser(path)))
            box.add_hidden_value("label", label)
            # Setup display & signal
            box.set_status("Unknown")
            if self.dark_color is not None:
                box.set_dark_color(*self.dark_color)
            box.set_color_hex(COLOR_FOLDER)
            box.set_vexpand(False)
            GLib.idle_add(box.show_all)  # Window border will dissapear without this on Windows
            self["folderlist"].pack_start(box, False, False, 3)
            box.set_open(folder_id in self.open_boxes or self.folders_never_loaded)
            box.connect("right-click", self.cb_popup_menu_folder)
            box.connect("doubleclick", self.cb_browse_folder)
            box.connect("enter-notify-event", self.cb_box_mouse_enter)
            box.connect("leave-notify-event", self.cb_box_mouse_leave)
            self.folders[folder_id] = box
            self.folders_never_loaded = False
        # Set values
        box.set_value("id", folder_id)
        box.set_value("path", display_path)
        if folder_type == "receiveonly":
            box.set_value("folder_type", _("Receive Only"))
        elif folder_type == "sendonly":
            box.set_value("folder_type", _("Send Only"))
        else:
            box.set_value("folder_type", _("Send & Receive"))
        box.set_value("ignore", _("Yes") if ignore_perms else _("No"))
        box.set_value("rescan", "%s s%s" % (rescan_interval, " " + _("(watch)") if fswatcher_enabled else ""))
        box.set_value("shared", ", ".join([n.get_title() for n in shared]))
        box.set_value("can_override", False)
        box.set_visible("id", self.config["folder_as_path"] or label not in (None, ""))
        box.set_visible("ignore", ignore_perms)
        return box

    def show_device(self, id, name, compression, introducer, used):
        if name in (None, ""):
            # Show first block from ID if name is unset
            name = id.split("-")[0]
        if not used:
            name = "%s (%s)" % (name, _("Unused"))
        if id in self.devices:
            # Reuse existing box
            box = self.devices[id]
            box.set_title(name)
        else:
            # Create new box
            box = InfoBox(self, name, IdentIcon(id))
            # Add visible lines
            box.add_value("address", "address.svg", _("Address"), None)
            box.add_value("sync", "sync.svg", _("Synchronization"), "0%", visible=False)
            box.add_value("compress", "compress.svg", _("Compression"))
            box.add_value("inbps", "dl_rate.svg", _("Download Rate"), "0 B/s (0 B)", visible=False)
            box.add_value("outbps", "up_rate.svg", _("Upload Rate"), "0 B/s (0 B)", visible=False)
            box.add_value("introducer", "thumb_up.svg", _("Introducer"))
            box.add_value("version", "version.svg", _("Version"), None, visible=False)
            box.add_value("last-seen", "clock.svg", _("Last Seen"), _("Never"))
            # Add hidden stuff
            box.add_hidden_value("id", id)
            box.add_hidden_value("connected", False)
            box.add_hidden_value("completion", {})
            box.add_hidden_value("time", 0)
            box.add_hidden_value("online", False)
            # Setup display & signal
            if self.dark_color is not None:
                box.set_dark_color(*self.dark_color)
            box.set_color_hex(COLOR_DEVICE)
            box.set_vexpand(False)
            box.set_open(id in self.open_boxes)
            box.get_icon().set_size_request(22, 22)
            GLib.idle_add(box.show_all)  # Window border will dissapear without this on Windows
            self["devicelist"].pack_start(box, False, False, 3)
            box.connect("right-click", self.cb_popup_menu_device)
            box.connect("enter-notify-event", self.cb_box_mouse_enter)
            box.connect("leave-notify-event", self.cb_box_mouse_leave)
            self.devices[id] = box
        # Set values
        if compression in (True, "always"):
            box.set_value("compress", _("All Data"))
        elif compression in (False, "never"):
            box.set_value("compress", _("Off"))
        else:
            box.set_value("compress", _("Metadata Only"))
        box.set_value("introducer", _("Yes") if introducer else _("No"))
        box.set_value("last-seen", _("Never"))
        return box

    def clear(self):
        """Clears folder and device lists."""
        for i in ("devicelist", "folderlist"):
            for c in [] + self[i].get_children():
                self[i].remove(c)
                c.destroy()
        self.devices = {}
        self.folders = {}

    def restart(self):
        """
        Removes everything, restets all data and reconnects
        to daemon.
        """
        self["edit-menu-button"].set_sensitive(False)
        self["menu-si-shutdown"].set_sensitive(False)
        self["menu-si-show-id"].set_sensitive(False)
        self["menu-si-recvlimit"].set_sensitive(False)
        self["menu-si-sendlimit"].set_sensitive(False)
        if not self["infobar"] is None:
            self.cb_infobar_close(self["infobar"])
        for r in self.error_boxes:
            r.get_parent().remove(r)
            r.destroy()
        self.error_boxes = []
        self.error_messages = set([])
        self.cancel_all()  # timers
        self.daemon.reconnect()

    def refresh(self):
        """
        Similar to restart().
        Re-requests all data from daemon, without disconnecting.
        Then refreshes all UI widgets.
        Looks cleaner & prevents UI from blinking.
        """
        log.debug("Reloading config...")
        self.daemon.reload_config()

    def change_setting_async(self, setting_name, value, retry_on_error=False, restart=True):
        """
        Asynchronously changes one value in daemon configuration and
        optionally restarts daemon.

        This will:
         - call daemon.read_config() to read configuration from daemon
         - change value in received YAML document
         - call daemon.write_config() to post configuration back
         - call daemon.restart()
        Everthing will be done asynchronously and will be repeated
        until succeed, if retry_on_error is set to True.
        Even if retry_on_error is False, error in write_config will
        be only logged.

        It is possible to change nested setting using '/' as separator.
        That may cause error if parent setting node is not present and
        this error will not cause retrying process as well.

        If value is callable, it's called instead of setting it.
        In such case, callable is called as:
           value(config_node_as_dict, setting_name)
        """
        # ^^ Longest comment in entire project

        # Callbacks
        def csnr_error(e, trash, setting_name, value, retry_on_error):
            """
            Error handler for change_setting_async method
            """
            log.error("change_setting_async: Failed to read configuration: %s", e)
            if retry_on_error:
                log.error("Retrying...")
                self.change_setting_async(setting_name, value, retry_on_error, restart)
            else:
                log.error("Giving up.")

        def csnr_save_error(e, *a):
            """
            Another error handler for change_setting_async method.
            This one just reports failure.
            """
            log.error("change_setting_async: Failed to store configuration: %s", e)
            log.error("Giving up.")

        def csnr_config_read(config, setting_name, value, retry_on_error):
            """
            Handler for change_setting_async
            Modifies received config and post it back.
            """
            c, setting = config, setting_name
            while "/" in setting:
                key, setting = setting.split("/", 1)
                c = c[key]
            if hasattr(value, "__call__"):
                value(c, setting)
            else:
                c[setting] = value
            self.daemon.write_config(config, csnr_config_saved, csnr_save_error, setting_name, value)

        def csnr_config_saved(setting_name, value):
            """
            Handler for change_setting_async
            Reports good stuff and restarts daemon.
            """
            log.verbose("Configuration value '%s' set to '%s'", setting_name, value)
            if restart:
                message = "%s %s..." % (_("Syncthing is restarting."), _("Please wait"))
                self.display_connect_dialog(message)
                self.set_status(False)
                self.restart()
                GLib.idle_add(self.daemon.restart)

        # Call
        self.daemon.read_config(csnr_config_read, csnr_error, setting_name, value, retry_on_error)

    def add_ignored(self, ignore_type, value):
        def cb(target, trash):
            if ignore_type not in target:
                target[ignore_type] = []
            target[ignore_type].append(value)

        self.change_setting_async(ignore_type, cb, restart=False)

    def quit(self, *a):
        if self.process is not None:
            if IS_WINDOWS:
                # Always kill subprocess on windows
                self.process.kill()
                self.process = None
            elif self.config["autokill_daemon"] == 2:  # Ask
                d = Gtk.MessageDialog(
                    self["window"],
                    Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
                    Gtk.MessageType.INFO,
                    0,
                    "%s\n%s" % (_("Exiting."), _("Shutdown Syncthing daemon as well?")),
                )
                d.add_button("gtk-yes", RESPONSE_SLAIN_DAEMON)
                d.add_button("gtk-no", RESPONSE_SPARE_DAEMON)
                cb = Gtk.CheckButton(_("Always do same; Don't show this window again"))
                d.get_content_area().pack_end(cb, False, False, 2)
                d.connect("response", self.cb_kill_daemon_response, cb)
                d.show_all()
                return
            elif self.config["autokill_daemon"] == 1:  # Yes
                self.process.terminate()
                self.process = None
        Gtk.Application.quit(self)

    def show_add_folder_dialog(self, path=None):
        """
        Waits for daemon to connect and shows 'add folder' dialog,
        optionally with pre-filled path entry.
        """
        handler_id = None

        def have_config(*a):
            """One-time handler for config-loaded signal"""
            if handler_id is not None:
                self.daemon.handler_disconnect(handler_id)
            self.show()
            e = FolderEditorDialog(self, True, None, path)
            e.call_after_loaded(e.fill_folder_id, generate_folder_id(), False)
            e.load()
            e.show(self["window"])

        if self.daemon.is_connected():
            have_config()
        else:
            handler_id = self.daemon.connect("config-loaded", have_config)

    def show_remove_folder_dialog(self, path):
        """
        Waits for daemon to connect, then searches for folder id assigned
        with specified path and shows 'remove folder' dialog, it such
        id is found.
        If id is not found, does nothing.
        """
        handler_id = None

        def have_config(*a):
            """One-time handler for config-loaded signal"""
            if handler_id is not None:
                self.daemon.handler_disconnect(handler_id)
            for rid in self.folders:
                if self.folders[rid]["path"] == path:
                    name = self.folders[rid].get_title()
                    self.show()
                    self.check_delete("folder", rid, name)
                    return
            log.warning("Failed to remove directory for path '%s': No such folder", path)

        if self.daemon.is_connected():
            have_config()
        else:
            handler_id = self.daemon.connect("config-loaded", have_config)

    def get_local_device(self):
        """
        Returns box with local device data.
        May return None if connection to daemon is yet to be made or local
        device info is not yet known.
        """
        if self.daemon.get_my_id() in self.devices:
            return self.devices[self.daemon.get_my_id()]
        return None

    def get_local_name(self):
        """
        Returns name of local device.
        If connection to daemon is yet to be made or local device info is not
        yet known, returns local hostname.
        """
        ld = self.get_local_device()
        if ld:
            return ld.get_title()
        if "HOSTNAME" in os.environ:
            return os.environ["HOSTNAME"]
        # Fallbacks to "local" when
        return "local"

    # --- Callbacks ---
    def cb_exit(self, *a):
        self.statusicon.hide()
        self.quit()

    def cb_about(self, *a):
        from syncthing_gtk.aboutdialog import AboutDialog

        AboutDialog(self, self.gladepath, self.iconpath).show(self["window"])

    def cb_delete_event(self, *e):
        # Hide main window
        self.hide()
        return True

    def cb_realized(self, widget, *a):
        context = widget.get_style_context()
        color = context.get_background_color(Gtk.StateFlags.SELECTED)
        # Dark color: Gdk.RGBA(red=0.223529, green=0.247059, blue=0.247059, alpha=1.000000)
        # Light color: Gdk.RGBA(red=0.929412, green=0.929412, blue=0.929412, alpha=1.000000)
        light_color = False
        for c in list(color)[0:3]:
            if c > 0.75:
                light_color = True
        if not light_color:
            # Set dark color based on current window background
            self.dark_color = (color.red, color.green, color.blue, 1.0)
            # Recolor all boxes
            for box in list(self.folders.values()):
                box.set_dark_color(*self.dark_color)
            for box in list(self.devices.values()):
                box.set_dark_color(*self.dark_color)

    def cb_box_mouse_enter(self, box, *a):
        self.hilight([box])

    def cb_box_mouse_leave(self, *a):
        self.hilight([])

    def cb_menu_show_id(self, *a):
        from syncthing_gtk.iddialog import IDDialog

        d = IDDialog(self, self.daemon.get_my_id())
        d.show(self["window"])

    def cb_menu_add_folder(self, event, *a):
        """Handler for 'Add folder' menu item"""
        self.show_add_folder_dialog()

    def cb_menu_add_device(self, event, *a):
        """Handler for 'Add device' menu item"""
        self.open_editor_device()

    def cb_menu_daemon_settings(self, event, *a):
        """Handler for 'Daemon Settings' menu item"""
        from syncthing_gtk.daemonsettings import DaemonSettingsDialog

        e = DaemonSettingsDialog(self)
        e.load()
        e.show(self["window"])

    def cb_menu_ui_settings(self, event, *a):
        """Handler for 'UI Settings' menu item"""
        from syncthing_gtk.uisettingsdialog import UISettingsDialog

        e = UISettingsDialog(self)
        e.load()
        e.show(self["window"])

    def cb_menu_recvlimit(self, menuitem, speed=0):
        if menuitem.get_active() and self.recv_limit != speed:
            self.change_setting_async("options/maxRecvKbps", speed)

    def cb_menu_sendlimit(self, menuitem, speed=0):
        if menuitem.get_active() and self.send_limit != speed:
            self.change_setting_async("options/maxSendKbps", speed)

    def cb_menu_recvlimit_other(self, menuitem):
        return self.cb_menu_limit_other(menuitem, self.recv_limit)

    def cb_menu_sendlimit_other(self, menuitem):
        return self.cb_menu_limit_other(menuitem, self.send_limit)

    def cb_menu_limit_other(self, menuitem, speed):
        # Common for cb_menu_recvlimit_other and cb_menu_sendlimit_other
        #
        # Removes checkbox, if speed is not considered as 'other'
        # Displays configuration dialog
        # Detect if checkbox was changed by user
        checked_by_user = (speed in [0] + SPEED_LIMIT_VALUES and menuitem.get_active()) or (
            not speed in [0] + SPEED_LIMIT_VALUES and not menuitem.get_active()
        )
        if checked_by_user:
            # Display daemon settings dialog and (un)check box back to
            # its correct state
            self.cb_menu_daemon_settings(None)
            menuitem.set_active(not menuitem.get_active())

    def cb_popup_menu_folder(self, box, button, time):
        self.rightclick_box = box
        if box["can_override"]:
            self["menu-popup-override"].set_visible(box["folder_type_s"] == "sendonly")
            self["menu-popup-revert"].set_visible(box["folder_type_s"] == "receiveonly")
            self["menu-separator-override"].set_visible(box["can_override"])
        else:
            self["menu-popup-override"].set_visible(False)
            self["menu-popup-revert"].set_visible(False)
            self["menu-separator-override"].set_visible(False)
        self["popup-menu-folder"].popup(None, None, None, None, button, time)

    def cb_popup_menu_device(self, box, button, time):
        self.rightclick_box = box
        # Display 'edit device' and 'delete device' menu items on
        # everything but my own node
        b = box["id"] != self.daemon.get_my_id()
        self["menu-popup-edit-device"].set_visible(b)
        self["menu-popup-delete-device"].set_visible(b)
        self["menu-popup-pause-device"].set_visible(box.get_status() != _("Paused"))
        self["menu-popup-resume-device"].set_visible(box.get_status() == _("Paused"))
        self["popup-menu-device"].popup(None, None, None, None, button, time)

    def cb_menu_popup(self, source, menu):
        """Handler for ubuntu-only toolbar buttons"""
        menu.popup(None, None, None, None, 0, 0)

    def cb_menu_popup_edit_folder(self, *a):
        """Handler for 'edit' context menu item"""
        # Editing folder
        self.open_editor(FolderEditorDialog, self.rightclick_box["id"])

    def cb_menu_popup_edit_ignored(self, *a):
        """Handler for 'edit ignore patterns' context menu item"""
        from syncthing_gtk.ignoreeditor import IgnoreEditor

        e = IgnoreEditor(
            self,
            self.rightclick_box["id"],
            self.rightclick_box["path"],
        )
        e.load()
        e.show(self["window"])

    def cb_menu_popup_edit_device(self, *a):
        """Handler for other 'edit' context menu item"""
        # Editing device
        self.open_editor_device(self.rightclick_box["id"])

    def cb_menu_popup_browse_folder(self, *a):
        """Handler for 'browse' folder context menu item"""
        self.cb_browse_folder(self.rightclick_box)

    def cb_browse_folder(self, box, *a):
        """Handler for 'browse' action"""
        path = os.path.expanduser(box["path"])
        if IS_WINDOWS:
            # Don't attempt anything, use registry settigns on Windows
            # (defaults to Windows Explorer)
            path = path.replace("/", "\\")
            os.startfile(path, self.config["file_browser"])
        else:
            # Try to use any of following, known commands to
            # display directory contents
            for x in ("xdg-open", "gnome-open", "kde-open"):
                if os.path.exists("/usr/pkg/bin/%s" % x):
                    os.system(("/usr/pkg/bin/%s '%s' &" % (x, path)).encode("utf-8"))
                    break

    def cb_menu_popup_delete_folder(self, *a):
        """Handler for 'delete' folder context menu item"""
        # Editing folder
        self.check_delete("folder", self.rightclick_box["id"], self.rightclick_box.get_title())

    def cb_menu_popup_rescan_folder(self, *a):
        """Handler for 'rescan' context menu item"""
        log.info("Rescan folder %s", self.rightclick_box["id"])
        self.daemon.rescan(self.rightclick_box["id"])

    def cb_menu_popup_override(self, *a):
        """Handler for 'override' context menu item"""
        log.info("Override folder %s", self.rightclick_box["id"])
        self.daemon.override(self.rightclick_box["id"])

    def cb_menu_popup_revert(self, *a):
        """Handler for 'override local' context menu item"""
        log.info("Revert folder %s", self.rightclick_box["id"])
        self.daemon.revert(self.rightclick_box["id"])

    def cb_menu_popup_delete_device(self, *a):
        """Handler for other 'edit' context menu item"""
        self.check_delete("device", self.rightclick_box["id"], self.rightclick_box.get_title())

    def cb_menu_popup_pause_device(self, *a):
        """Handler for 'resume device' context menu item"""
        self.daemon.pause(self.rightclick_box["id"])

    def cb_menu_popup_resume_device(self, *a):
        """Handler for 'resume device' context menu item"""
        self.daemon.resume(self.rightclick_box["id"])

    def check_delete(self, mode, id, name):
        """
        Asks user if he really wants to do what he just asked to do
        """
        msg = _("Do you really want to permanently stop synchronizing directory '%s'?")
        if mode == "device":
            msg = _("Do you really want remove device '%s' from Syncthing?")
        d = Gtk.MessageDialog(
            self["window"],
            Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
            Gtk.MessageType.QUESTION,
            Gtk.ButtonsType.YES_NO,
            msg % name,
        )
        r = d.run()
        d.hide()
        d.destroy()
        if r == Gtk.ResponseType.YES:
            # Load config from server (to have something to delete from)
            self.daemon.read_config(self.cb_delete_config_loaded, None, mode, id)

    def cb_delete_config_loaded(self, config, mode, id):
        """
        Callback called when user decides to _really_ delete something and
        configuration is loaded from server.
        """
        if mode == "folder":
            config["folders"] = [x for x in config["folders"] if x["id"] != id]
            if id in self.folders:
                self.folders[id].get_parent().remove(self.folders[id])
        else:  # device
            config["devices"] = [x for x in config["devices"] if x["deviceID"] != id]
            if id in self.devices:
                self.devices[id].get_parent().remove(self.devices[id])
        self.daemon.write_config(config, lambda *a: a)

    def open_editor(self, cls, id):
        e = cls(self, False, id)
        e.load()
        e.show(self["window"])

    def open_editor_device(self, id=None, name=None):
        # Close a previously opened deviceeditor
        if self.editor_device:
            self.editor_device.close()

        self.editor_device = DeviceEditorDialog(self, id not in self.devices, id)

        if name and id not in self.devices:
            self.editor_device.call_after_loaded(self.editor_device["vname"].set_text, name)
        self.editor_device.load()
        self.editor_device.show(self["window"])

    def open_editor_folder(self, id=None, label=None, nid=None):
        # Close a previously opened deviceeditor
        if self.editor_folder:
            self.editor_folder.close()

        self.editor_folder = FolderEditorDialog(self, id not in self.folders, id)

        # Find folder with matching ID ...
        if id in self.folders:
            # ... if found, show edit dialog and pre-select
            # matching device
            self.editor_folder.call_after_loaded(self.editor_folder.mark_device, nid)
        else:
            # If there is no matching folder, prefill 'new folder'
            # dialog and let user to save it
            self.editor_folder.call_after_loaded(self.editor_folder.mark_device, nid)
            self.editor_folder.call_after_loaded(self.editor_folder.fill_folder_id, id)
            if label:
                self.editor_folder.call_after_loaded(self.editor_folder["vlabel"].set_text, label)

        self.editor_folder.load()
        self.editor_folder.show(self["window"])

    def cb_menu_popup_show_id(self, *a):
        """Handler for 'show id' context menu item"""
        # Available only for devices
        from syncthing_gtk.iddialog import IDDialog

        d = IDDialog(self, self.rightclick_box["id"])
        d.show(self["window"])

    def cb_menu_restart(self, event, *a):
        """Handler for 'Restart' menu item"""
        self.daemon.restart()

    def cb_menu_shutdown(self, event, *a):
        """Handler for 'Shutdown' menu item"""
        self.process = None  # Prevent app from restarting daemon
        self.daemon.shutdown()

    def cb_menu_resume(self, event, *a):
        """Handler for 'Resume' menu item"""
        self.start_daemon_ui()

    def cb_menu_webui(self, *a):
        """Handler for 'Open WebUI' menu item"""
        log.info("Opening '%s' in browser", self.daemon.get_webui_url())
        webbrowser.open(self.daemon.get_webui_url())

    def cb_menu_daemon_output(self, *a):
        if self.process is not None:
            d = DaemonOutputDialog(self, self.process)
            d.show(None)

    def cb_statusicon_click(self, *a):
        """Called when user clicks on status icon"""
        # Hide / show main window
        if self.is_visible():
            self.hide()
        else:
            self.show()

    def cb_statusicon_notify_active(self, *a):
        """Called when the status icon changes its "inaccessible for sure" state"""
        # Show main window if the status icon thinks that no icon is visible to the user
        if not self.statusicon.get_active():
            if not (IS_GNOME or IS_I3 or IS_MATE or IS_XFCE):
                # Gnome sometimes lag on this, but always ends displaying icon later
                # ... and i3 as well
                # ... oh gods :'(
                self.show()

    def cb_infobar_close(self, bar):
        if bar == self["infobar"]:
            self["infobar"] = None
        bar.close()
        if bar in self.error_boxes:
            self.error_boxes.remove(bar)

    def cb_infobar_response(self, bar, response_id, additional_data={}):
        # TODO: Split this, I don't like handling different things in
        # one method
        if response_id == RESPONSE_RESTART:
            # Restart
            self.daemon.restart()
        elif response_id == RESPONSE_FIX_ADD_FOLDER:
            # Give up if there is no device with matching ID
            if additional_data["nid"] in self.devices:
                self.open_editor_folder(additional_data["rid"], additional_data["label"], additional_data["nid"])
        elif response_id == RESPONSE_FIX_IGNORE_FOLDER:
            # Ignore unknown folder
            self.add_ignored("ignoredFolders", additional_data["rid"])
        elif response_id == RESPONSE_FIX_ADD_DEVICE:
            self.open_editor_device(additional_data["nid"], additional_data["name"])
        elif response_id == RESPONSE_FIX_IGNORE_DEV:
            # Ignore unknown device
            self.add_ignored("ignoredDevices", additional_data["nid"])
        elif response_id == RESPONSE_UR_ALLOW:
            # Allow Usage reporting
            self.change_setting_async("options/urAccepted", 1)
        elif response_id == RESPONSE_UR_FORBID:
            # Allow Usage reporting
            self.change_setting_async("options/urAccepted", -1)
        self.cb_infobar_close(bar)

    def cb_open_closed(self, box):
        """
        Called from InfoBox when user opens or closes bottom part
        """
        if box.is_open():
            self.open_boxes.add(box["id"])
        else:
            self.open_boxes.discard(box["id"])

    def cb_connect_dialog_response(self, dialog, response, checkbox):
        # Common for 'Daemon is not running' and 'Connecting to daemon...'
        if response == RESPONSE_START_DAEMON:
            self.start_daemon_ui()
            if checkbox is not None and checkbox.get_active():
                self.config["autostart_daemon"] = 1
        else:  # if response <= 0 or response == RESPONSE_QUIT:
            self.cb_exit()

    def cb_kill_daemon_response(self, dialog, response, checkbox):
        if response == RESPONSE_SLAIN_DAEMON:
            if self.process is not None:
                self.process.terminate()
                self.process = None
        if checkbox.get_active():
            self.config["autokill_daemon"] = 1 if response == RESPONSE_SLAIN_DAEMON else 0
        self.process = None
        self.cb_exit()

    def cb_wizard_finished(self, wizard, *a):
        self.wizard = None
        if wizard.is_finished() and not self.exit_after_wizard:
            # Good, try connecting again
            wizard.hide()
            wizard.destroy()
            self.show()
            if self.process:
                self.process.kill()
                self.cb_daemon_exit(self.process, 0)
            if self.setup_connection():
                self.daemon.reconnect()
        else:
            self.quit()

    def cb_daemon_line_captured(self, daemon, line):
        sys.stdout.write(line)
        sys.stdout.write("\n")
        sys.stdout.flush()

    def cb_daemon_exit(self, proc, error_code):
        if proc == self.process:
            # Whatever happens, if daemon dies while it shouldn't,
            # restart it...
            if time.time() - self.last_restart_time < RESTART_TOO_FREQUENT_INTERVAL:
                # ... unless it keeps restarting
                self.cb_daemon_startup_failed(proc, "Daemon exits too fast")
                return
            self.last_restart_time = time.time()
            if self.config["st_autoupdate"] and os.path.exists(self.config["syncthing_binary"] + ".new"):
                # New daemon version is downloaded and ready to use.
                # Switch to this version before restarting
                self.swap_updated_binary()
                if self.restart_after_update:
                    self.restart_after_update = False
                    self.restart()
            self.ct_process()

    def cb_daemon_startup_failed(self, proc, exception):
        """
        Check if daemon binary exists.
        If not, ask user where did he put it
        """
        # Prepare FindDaemonDialog instance where user can
        # set new path for syncthing_binary
        from syncthing_gtk.finddaemondialog import FindDaemonDialog

        d = FindDaemonDialog(self)

        d.load()
        d.set_transient_for(self["window"] if self.connect_dialog is None else self.connect_dialog)
        # If binary exists, assume that something is completely wrong,
        # and change error message
        if os.path.exists(self.config["syncthing_binary"]):
            d.set_message(
                "%s\n%s %s\n\n%s"
                % (
                    _("Failed to start Syncthing daemon."),
                    _("Error message:"),
                    str(exception),
                    _("Please, check your installation or set new path to Syncthing daemon binary."),
                )
            )
            d.hide_download_button()
        # Let dialog run and try running syncthing again if new
        # syncthing_binary is acquired
        r = d.run()
        d.destroy()
        if r == FindDaemonDialog.RESPONSE_SAVED:
            self.cb_daemon_exit(self.process, -1)
        else:
            self.quit()
