Fix: Website redirection detection error

[gpodder.git] / src / gpodder / gui.py

# -*- coding: utf-8 -*-
#
# gPodder - A media aggregator and podcast client
# Copyright (c) 2005-2009 Thomas Perl and the gPodder Team
#
# gPodder is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# gPodder is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

import os
import gtk
import gtk.gdk
import gobject
import pango
import sys
import shutil
import subprocess
import glob
import time
import urllib
import urllib2
import tempfile
import collections
import threading

from xml.sax import saxutils

import gpodder

try:
    import dbus
    import dbus.service
    import dbus.mainloop
    import dbus.glib
except ImportError:
    # Mock the required D-Bus interfaces with no-ops (ugly? maybe.)
    class dbus:
        class SessionBus:
            def __init__(self, *args, **kwargs):
                pass
        class glib:
            class DBusGMainLoop:
                pass
        class service:
            @staticmethod
            def method(interface):
                return lambda x: x
            class BusName:
                def __init__(self, *args, **kwargs):
                    pass
            class Object:
                def __init__(self, *args, **kwargs):
                    pass


from gpodder import feedcore
from gpodder import util
from gpodder import opml
from gpodder import download
from gpodder import my
from gpodder.liblogger import log

_ = gpodder.gettext

from gpodder.model import PodcastChannel
from gpodder.dbsqlite import Database

from gpodder.gtkui.model import PodcastListModel
from gpodder.gtkui.model import EpisodeListModel
from gpodder.gtkui.config import UIConfig
from gpodder.gtkui.download import DownloadStatusModel
from gpodder.gtkui.services import CoverDownloader
from gpodder.gtkui.widgets import SimpleMessageArea
from gpodder.gtkui.desktopfile import UserAppsReader

from gpodder.gtkui.draw import draw_text_box_centered

from gpodder.gtkui.interface.common import BuilderWidget
from gpodder.gtkui.interface.common import TreeViewHelper
from gpodder.gtkui.interface.addpodcast import gPodderAddPodcast

if gpodder.ui.desktop:
    from gpodder.gtkui.desktop.sync import gPodderSyncUI

    from gpodder.gtkui.desktop.channel import gPodderChannel
    from gpodder.gtkui.desktop.preferences import gPodderPreferences
    from gpodder.gtkui.desktop.shownotes import gPodderShownotes
    from gpodder.gtkui.desktop.episodeselector import gPodderEpisodeSelector
    from gpodder.gtkui.desktop.podcastdirectory import gPodderPodcastDirectory
    try:
        from gpodder.gtkui.desktop.trayicon import GPodderStatusIcon
        have_trayicon = True
    except Exception, exc:
        log('Warning: Could not import gpodder.trayicon.', traceback=True)
        log('Warning: This probably means your PyGTK installation is too old!')
        have_trayicon = False
    from gpodder.gtkui.interface.dependencymanager import gPodderDependencyManager
elif gpodder.ui.diablo:
    from gpodder.gtkui.maemo.channel import gPodderChannel
    from gpodder.gtkui.maemo.preferences import gPodderPreferences
    from gpodder.gtkui.maemo.shownotes import gPodderShownotes
    from gpodder.gtkui.maemo.episodeselector import gPodderEpisodeSelector
    from gpodder.gtkui.maemo.podcastdirectory import gPodderPodcastDirectory
    have_trayicon = False
elif gpodder.ui.fremantle:
    from gpodder.gtkui.maemo.channel import gPodderChannel
    from gpodder.gtkui.maemo.preferences import gPodderPreferences
    from gpodder.gtkui.frmntl.shownotes import gPodderShownotes
    from gpodder.gtkui.frmntl.episodeselector import gPodderEpisodeSelector
    from gpodder.gtkui.frmntl.podcastdirectory import gPodderPodcastDirectory
    from gpodder.gtkui.frmntl.podcasts import gPodderPodcasts
    from gpodder.gtkui.frmntl.episodes import gPodderEpisodes
    from gpodder.gtkui.frmntl.downloads import gPodderDownloads
    from gpodder.gtkui.interface.common import Orientation
    have_trayicon = False

    from gpodder.gtkui.frmntl.portrait import FremantleAutoRotation

from gpodder.gtkui.interface.welcome import gPodderWelcome
from gpodder.gtkui.interface.progress import ProgressIndicator

if gpodder.ui.maemo:
    import hildon

class gPodder(BuilderWidget, dbus.service.Object):
    finger_friendly_widgets = ['btnCleanUpDownloads']

    def __init__(self, bus_name, config):
        dbus.service.Object.__init__(self, object_path=gpodder.dbus_gui_object_path, bus_name=bus_name)
        self.db = Database(gpodder.database_file)
        self.config = config
        BuilderWidget.__init__(self, None)
    
    def new(self):
        if gpodder.ui.diablo:
            import hildon
            self.app = hildon.Program()
            self.app.add_window(self.main_window)
            self.main_window.add_toolbar(self.toolbar)
            menu = gtk.Menu()
            for child in self.main_menu.get_children():
                child.reparent(menu)
            self.main_window.set_menu(self.set_finger_friendly(menu))
            self.bluetooth_available = False
        elif gpodder.ui.fremantle:
            import hildon
            self.app = hildon.Program()
            self.app.add_window(self.main_window)

            appmenu = hildon.AppMenu()
            for action in (self.itemUpdate, \
                           self.itemRemoveOldEpisodes, \
                           self.itemPreferences):
                button = gtk.Button()
                action.connect_proxy(button)
                appmenu.append(button)
            appmenu.show_all()
            self.main_window.set_app_menu(appmenu)
            self._fremantle_update_banner = None

            # Activate application-wide automatic portrait orientation
            FremantleAutoRotation()

            self.bluetooth_available = False
        else:
            if gpodder.win32:
                # FIXME: Implement e-mail sending of list in win32
                self.item_email_subscriptions.set_sensitive(False)
            self.bluetooth_available = util.bluetooth_available()
            self.toolbar.set_property('visible', self.config.show_toolbar)

        self.config.connect_gtk_window(self.gPodder, 'main_window')
        if not gpodder.ui.fremantle:
            self.config.connect_gtk_paned('paned_position', self.channelPaned)
        self.main_window.show()

        self.gPodder.connect('key-press-event', self.on_key_press)

        self.config.add_observer(self.on_config_changed)

        self.tray_icon = None
        self.episode_shownotes_window = None

        if gpodder.ui.desktop:
            self.sync_ui = gPodderSyncUI(self.config, self.notification, \
                    self.main_window, self.show_confirmation, \
                    self.update_episode_list_icons, \
                    self.update_podcast_list_model, self.toolPreferences, \
                    gPodderEpisodeSelector)
        else:
            self.sync_ui = None

        self.download_status_model = DownloadStatusModel()
        self.download_queue_manager = download.DownloadQueueManager(self.config)

        if gpodder.ui.desktop:
            self.show_hide_tray_icon()
            self.itemShowToolbar.set_active(self.config.show_toolbar)
            self.itemShowDescription.set_active(self.config.episode_list_descriptions)

        if not gpodder.ui.fremantle:
            self.config.connect_gtk_spinbutton('max_downloads', self.spinMaxDownloads)
            self.config.connect_gtk_togglebutton('max_downloads_enabled', self.cbMaxDownloads)
            self.config.connect_gtk_spinbutton('limit_rate_value', self.spinLimitDownloads)
            self.config.connect_gtk_togglebutton('limit_rate', self.cbLimitDownloads)

            # When the amount of maximum downloads changes, notify the queue manager
            changed_cb = lambda spinbutton: self.download_queue_manager.spawn_and_retire_threads()
            self.spinMaxDownloads.connect('value-changed', changed_cb)

        self.default_title = 'gPodder'
        if gpodder.__version__.rfind('git') != -1:
            self.set_title('gPodder %s' % gpodder.__version__)
        else:
            title = self.gPodder.get_title()
            if title is not None:
                self.set_title(title)
            else:
                self.set_title(_('gPodder'))

        self.cover_downloader = CoverDownloader()

        # Generate list models for podcasts and their episodes
        self.podcast_list_model = PodcastListModel(self.config.podcast_list_icon_size, self.cover_downloader)

        self.cover_downloader.register('cover-available', self.cover_download_finished)
        self.cover_downloader.register('cover-removed', self.cover_file_removed)

        if gpodder.ui.fremantle:
            self.button_subscribe.set_name('HildonButton-thumb')
            self.button_podcasts.set_name('HildonButton-thumb')
            self.button_downloads.set_name('HildonButton-thumb')

            hildon.hildon_gtk_window_set_progress_indicator(self.main_window, True)
            while gtk.events_pending():
                gtk.main_iteration(False)

            self.episodes_window = gPodderEpisodes(self.main_window, \
                    on_treeview_expose_event=self.on_treeview_expose_event, \
                    show_episode_shownotes=self.show_episode_shownotes, \
                    update_podcast_list_model=self.update_podcast_list_model, \
                    on_itemRemoveChannel_activate=self.on_itemRemoveChannel_activate, \
                    item_view_episodes_all=self.item_view_episodes_all, \
                    item_view_episodes_unplayed=self.item_view_episodes_unplayed, \
                    item_view_episodes_downloaded=self.item_view_episodes_downloaded, \
                    item_view_episodes_undeleted=self.item_view_episodes_undeleted)

            def on_podcast_selected(channel):
                self.active_channel = channel
                self.update_episode_list_model()
                self.episodes_window.channel = self.active_channel
                self.episodes_window.show()

            self.podcasts_window = gPodderPodcasts(self.main_window, \
                    show_podcast_episodes=on_podcast_selected, \
                    on_treeview_expose_event=self.on_treeview_expose_event, \
                    on_itemAddChannel_activate=self.on_itemAddChannel_activate, \
                    on_itemUpdate_activate=self.on_itemUpdate_activate, \
                    item_view_podcasts_all=self.item_view_podcasts_all, \
                    item_view_podcasts_downloaded=self.item_view_podcasts_downloaded, \
                    item_view_podcasts_unplayed=self.item_view_podcasts_unplayed)

            self.downloads_window = gPodderDownloads(self.main_window, \
                    on_treeview_expose_event=self.on_treeview_expose_event, \
                    on_btnCleanUpDownloads_clicked=self.on_btnCleanUpDownloads_clicked)
            self.treeChannels = self.podcasts_window.treeview
            self.treeAvailable = self.episodes_window.treeview
            self.treeDownloads = self.downloads_window.treeview

        # Init the treeviews that we use
        self.init_podcast_list_treeview()
        self.init_episode_list_treeview()
        self.init_download_list_treeview()

        if self.config.podcast_list_hide_boring:
            self.item_view_hide_boring_podcasts.set_active(True)

        self.currently_updating = False

        if gpodder.ui.maemo:
            self.context_menu_mouse_button = 1
        else:
            self.context_menu_mouse_button = 3

        if self.config.start_iconified:
            self.iconify_main_window()

        self.download_tasks_seen = set()
        self.download_list_update_enabled = False
        self.last_download_count = 0

        # Subscribed channels
        self.active_channel = None
        self.channels = PodcastChannel.load_from_db(self.db, self.config.download_dir)
        self.channel_list_changed = True
        self.update_podcasts_tab()

        # load list of user applications for audio playback
        self.user_apps_reader = UserAppsReader(['audio', 'video'])
        def read_apps():
            time.sleep(3) # give other parts of gpodder a chance to start up
            self.user_apps_reader.read()
            util.idle_add(self.user_apps_reader.get_applications_as_model, 'audio', False)
            util.idle_add(self.user_apps_reader.get_applications_as_model, 'video', False)
        threading.Thread(target=read_apps).start()

        # Set the "Device" menu item for the first time
        if gpodder.ui.desktop:
            self.update_item_device()

        # Now, update the feed cache, when everything's in place
        if not gpodder.ui.fremantle:
            self.btnUpdateFeeds.show()
        self.updating_feed_cache = False
        self.feed_cache_update_cancelled = False
        self.update_feed_cache(force_update=self.config.update_on_startup)

        # Look for partial file downloads
        partial_files = glob.glob(os.path.join(self.config.download_dir, '*', '*.partial'))

        # Message area
        self.message_area = None

        resumable_episodes = []
        if len(partial_files) > 0:
            for f in partial_files:
                correct_name = f[:-len('.partial')] # strip ".partial"
                log('Searching episode for file: %s', correct_name, sender=self)
                found_episode = False
                for c in self.channels:
                    for e in c.get_all_episodes():
                        if e.local_filename(create=False, check_only=True) == correct_name:
                            log('Found episode: %s', e.title, sender=self)
                            resumable_episodes.append(e)
                            found_episode = True
                        if found_episode:
                            break
                    if found_episode:
                        break
                if not found_episode:
                    log('Partial file without episode: %s', f, sender=self)
                    util.delete_file(f)

            if len(resumable_episodes):
                self.download_episode_list_paused(resumable_episodes)
                if not gpodder.ui.fremantle:
                    self.message_area = SimpleMessageArea(_('There are unfinished downloads from your last session.\nPick the ones you want to continue downloading.'))
                    self.vboxDownloadStatusWidgets.pack_start(self.message_area, expand=False)
                    self.vboxDownloadStatusWidgets.reorder_child(self.message_area, 0)
                    self.message_area.show_all()
                    self.wNotebook.set_current_page(1)

            self.clean_up_downloads(delete_partial=False)
        else:
            self.clean_up_downloads(delete_partial=True)

        # Start the auto-update procedure
        self.auto_update_procedure(first_run=True)

        # Delete old episodes if the user wishes to
        if self.config.auto_remove_old_episodes:
            old_episodes = self.get_old_episodes()
            if len(old_episodes) > 0:
                self.delete_episode_list(old_episodes, confirm=False)
                self.update_podcast_list_model(set(e.channel.url for e in old_episodes))

        if gpodder.ui.fremantle:
            hildon.hildon_gtk_window_set_progress_indicator(self.main_window, False)
            self.button_subscribe.set_sensitive(True)
            self.button_podcasts.set_sensitive(True)
            self.button_downloads.set_sensitive(True)

        # First-time users should be asked if they want to see the OPML
        if not self.channels and not gpodder.ui.fremantle:
            util.idle_add(self.on_itemUpdate_activate)

    def on_button_subscribe_clicked(self, button):
        self.on_itemImportChannels_activate(button)

    def on_button_podcasts_clicked(self, widget):
        if self.channels:
            self.podcasts_window.show()
        else:
            gPodderWelcome(self.gPodder, \
                    show_example_podcasts_callback=self.on_itemImportChannels_activate, \
                    setup_my_gpodder_callback=self.on_download_from_mygpo)

    def on_button_downloads_clicked(self, widget):
        self.downloads_window.show()

    def on_window_orientation_changed(self, orientation):
        old_container = self.main_window.get_child()
        if orientation == Orientation.PORTRAIT:
            container = gtk.VButtonBox()
        else:
            container = gtk.HButtonBox()
        container.set_layout(old_container.get_layout())
        for child in old_container.get_children():
            if orientation == Orientation.LANDSCAPE:
                child.set_alignment(0.5, 0.5, 0., 0.)
                child.set_property('width-request', 200)
            else:
                child.set_alignment(0.5, 0.5, .9, 0.)
                child.set_property('width-request', 350)
            child.reparent(container)
        container.show_all()
        self.buttonbox = container
        self.main_window.remove(old_container)
        self.main_window.add(container)

    def on_treeview_podcasts_selection_changed(self, selection):
        model, iter = selection.get_selected()
        if iter is None:
            self.active_channel = None
            self.episode_list_model.clear()

    def on_treeview_button_pressed(self, treeview, event):
        TreeViewHelper.save_button_press_event(treeview, event)

        if getattr(treeview, TreeViewHelper.ROLE) == \
                TreeViewHelper.ROLE_PODCASTS:
            return self.currently_updating

        return event.button == self.context_menu_mouse_button and \
                gpodder.ui.desktop

    def on_treeview_podcasts_button_released(self, treeview, event):
        if gpodder.ui.maemo:
            return self.treeview_channels_handle_gestures(treeview, event)

        return self.treeview_channels_show_context_menu(treeview, event)

    def on_treeview_episodes_button_released(self, treeview, event):
        if gpodder.ui.maemo:
            if self.config.enable_fingerscroll or self.config.maemo_enable_gestures:
                return self.treeview_available_handle_gestures(treeview, event)

        return self.treeview_available_show_context_menu(treeview, event)

    def on_treeview_downloads_button_released(self, treeview, event):
        return self.treeview_downloads_show_context_menu(treeview, event)

    def init_podcast_list_treeview(self):
        # Set up podcast channel tree view widget
        self.treeChannels.set_search_equal_func(TreeViewHelper.make_search_equal_func(PodcastListModel))

        if gpodder.ui.fremantle:
            if self.config.podcast_list_view_mode == EpisodeListModel.VIEW_DOWNLOADED:
                self.item_view_podcasts_downloaded.set_active(True)
            elif self.config.podcast_list_view_mode == EpisodeListModel.VIEW_UNPLAYED:
                self.item_view_podcasts_unplayed.set_active(True)
            else:
                self.item_view_podcasts_all.set_active(True)
            self.podcast_list_model.set_view_mode(self.config.podcast_list_view_mode)

        iconcolumn = gtk.TreeViewColumn('')
        iconcell = gtk.CellRendererPixbuf()
        iconcolumn.pack_start(iconcell, False)
        iconcolumn.add_attribute(iconcell, 'pixbuf', PodcastListModel.C_COVER)
        self.treeChannels.append_column(iconcolumn)

        namecolumn = gtk.TreeViewColumn('')
        namecell = gtk.CellRendererText()
        namecell.set_property('ellipsize', pango.ELLIPSIZE_END)
        namecolumn.pack_start(namecell, True)
        namecolumn.add_attribute(namecell, 'markup', PodcastListModel.C_DESCRIPTION)

        iconcell = gtk.CellRendererPixbuf()
        iconcell.set_property('xalign', 1.0)
        namecolumn.pack_start(iconcell, False)
        namecolumn.add_attribute(iconcell, 'pixbuf', PodcastListModel.C_PILL)
        namecolumn.add_attribute(iconcell, 'visible', PodcastListModel.C_PILL_VISIBLE)
        self.treeChannels.append_column(namecolumn)

        self.treeChannels.set_model(self.podcast_list_model.get_filtered_model())

        # When no podcast is selected, clear the episode list model
        selection = self.treeChannels.get_selection()
        selection.connect('changed', self.on_treeview_podcasts_selection_changed)

        TreeViewHelper.set(self.treeChannels, TreeViewHelper.ROLE_PODCASTS)

    def init_episode_list_treeview(self):
        self.episode_list_model = EpisodeListModel()

        if self.config.episode_list_view_mode == EpisodeListModel.VIEW_UNDELETED:
            self.item_view_episodes_undeleted.set_active(True)
        elif self.config.episode_list_view_mode == EpisodeListModel.VIEW_DOWNLOADED:
            self.item_view_episodes_downloaded.set_active(True)
        elif self.config.episode_list_view_mode == EpisodeListModel.VIEW_UNPLAYED:
            self.item_view_episodes_unplayed.set_active(True)
        else:
            self.item_view_episodes_all.set_active(True)

        self.episode_list_model.set_view_mode(self.config.episode_list_view_mode)

        self.treeAvailable.set_model(self.episode_list_model.get_filtered_model())

        TreeViewHelper.set(self.treeAvailable, TreeViewHelper.ROLE_EPISODES)

        iconcell = gtk.CellRendererPixbuf()
        if gpodder.ui.maemo:
            iconcell.set_fixed_size(50, 50)
            status_column_label = ''
        else:
            status_column_label = _('Status')
        iconcolumn = gtk.TreeViewColumn(status_column_label, iconcell, pixbuf=EpisodeListModel.C_STATUS_ICON)

        namecell = gtk.CellRendererText()
        namecell.set_property('ellipsize', pango.ELLIPSIZE_END)
        namecolumn = gtk.TreeViewColumn(_('Episode'), namecell, markup=EpisodeListModel.C_DESCRIPTION)
        namecolumn.set_sizing(gtk.TREE_VIEW_COLUMN_AUTOSIZE)
        namecolumn.set_resizable(True)
        namecolumn.set_expand(True)

        sizecell = gtk.CellRendererText()
        sizecolumn = gtk.TreeViewColumn(_('Size'), sizecell, text=EpisodeListModel.C_FILESIZE_TEXT)

        releasecell = gtk.CellRendererText()
        releasecolumn = gtk.TreeViewColumn(_('Released'), releasecell, text=EpisodeListModel.C_PUBLISHED_TEXT)

        for itemcolumn in (iconcolumn, namecolumn, sizecolumn, releasecolumn):
            itemcolumn.set_reorderable(True)
            self.treeAvailable.append_column(itemcolumn)

        if gpodder.ui.maemo:
            sizecolumn.set_visible(False)
            releasecolumn.set_visible(False)

        self.treeAvailable.set_search_equal_func(TreeViewHelper.make_search_equal_func(EpisodeListModel))

        selection = self.treeAvailable.get_selection()
        if gpodder.ui.diablo:
            if self.config.maemo_enable_gestures or self.config.enable_fingerscroll:
                selection.set_mode(gtk.SELECTION_SINGLE)
            else:
                selection.set_mode(gtk.SELECTION_MULTIPLE)
        elif gpodder.ui.fremantle:
            selection.set_mode(gtk.SELECTION_SINGLE)
        else:
            selection.set_mode(gtk.SELECTION_MULTIPLE)
            # Update the sensitivity of the toolbar buttons on the Desktop
            selection.connect('changed', lambda s: self.play_or_download())

        if gpodder.ui.diablo:
            # Set up the tap-and-hold context menu for podcasts
            menu = gtk.Menu()
            menu.append(self.itemUpdateChannel.create_menu_item())
            menu.append(self.itemEditChannel.create_menu_item())
            menu.append(gtk.SeparatorMenuItem())
            menu.append(self.itemRemoveChannel.create_menu_item())
            menu.append(gtk.SeparatorMenuItem())
            item = gtk.ImageMenuItem(_('Close this menu'))
            item.set_image(gtk.image_new_from_stock(gtk.STOCK_CLOSE, \
                    gtk.ICON_SIZE_MENU))
            menu.append(item)
            menu.show_all()
            menu = self.set_finger_friendly(menu)
            self.treeChannels.tap_and_hold_setup(menu)


    def init_download_list_treeview(self):
        # enable multiple selection support
        self.treeDownloads.get_selection().set_mode(gtk.SELECTION_MULTIPLE)
        self.treeDownloads.set_search_equal_func(TreeViewHelper.make_search_equal_func(DownloadStatusModel))

        # columns and renderers for "download progress" tab
        # First column: [ICON] Episodename
        column = gtk.TreeViewColumn(_('Episode'))

        cell = gtk.CellRendererPixbuf()
        if gpodder.ui.maemo:
            cell.set_fixed_size(50, 50)
        cell.set_property('stock-size', gtk.ICON_SIZE_MENU)
        column.pack_start(cell, expand=False)
        column.add_attribute(cell, 'stock-id', \
                DownloadStatusModel.C_ICON_NAME)

        cell = gtk.CellRendererText()
        cell.set_property('ellipsize', pango.ELLIPSIZE_END)
        column.pack_start(cell, expand=True)
        column.add_attribute(cell, 'text', DownloadStatusModel.C_NAME)

        column.set_sizing(gtk.TREE_VIEW_COLUMN_AUTOSIZE)
        column.set_resizable(True)
        column.set_expand(True)
        self.treeDownloads.append_column(column)

        # Second column: Progress
        column = gtk.TreeViewColumn(_('Progress'), gtk.CellRendererProgress(),
                value=DownloadStatusModel.C_PROGRESS, \
                text=DownloadStatusModel.C_PROGRESS_TEXT)
        self.treeDownloads.append_column(column)

        # Third column: Size
        if gpodder.ui.desktop:
            column = gtk.TreeViewColumn(_('Size'), gtk.CellRendererText(),
                    text=DownloadStatusModel.C_SIZE_TEXT)
            self.treeDownloads.append_column(column)

        # Fourth column: Speed
        column = gtk.TreeViewColumn(_('Speed'), gtk.CellRendererText(),
                text=DownloadStatusModel.C_SPEED_TEXT)
        self.treeDownloads.append_column(column)

        if not gpodder.ui.fremantle:
            # Fifth column: Status
            column = gtk.TreeViewColumn(_('Status'), gtk.CellRendererText(),
                    text=DownloadStatusModel.C_STATUS_TEXT)
            self.treeDownloads.append_column(column)

        self.treeDownloads.set_model(self.download_status_model)
        TreeViewHelper.set(self.treeDownloads, TreeViewHelper.ROLE_DOWNLOADS)

    def on_treeview_expose_event(self, treeview, event):
        if event.window == treeview.get_bin_window():
            model = treeview.get_model()
            if (model is not None and model.get_iter_first() is not None):
                return False

            role = getattr(treeview, TreeViewHelper.ROLE)
            ctx = event.window.cairo_create()
            ctx.rectangle(event.area.x, event.area.y,
                    event.area.width, event.area.height)
            ctx.clip()

            x, y, width, height, depth = event.window.get_geometry()

            if role == TreeViewHelper.ROLE_EPISODES:
                if self.currently_updating:
                    text = _('Loading episodes') + '...'
                elif self.config.episode_list_view_mode != \
                        EpisodeListModel.VIEW_ALL:
                    text = _('No episodes in current view')
                else:
                    text = _('No episodes available')
            elif role == TreeViewHelper.ROLE_PODCASTS:
                if self.config.episode_list_view_mode != \
                        EpisodeListModel.VIEW_ALL and \
                        self.config.podcast_list_hide_boring and \
                        len(self.channels) > 0:
                    text = _('No podcasts in this view')
                else:
                    text = _('No subscriptions')
            elif role == TreeViewHelper.ROLE_DOWNLOADS:
                text = _('No active downloads')
            else:
                raise Exception('on_treeview_expose_event: unknown role')

            if gpodder.ui.fremantle:
                from gpodder.gtkui.frmntl import style
                font_desc = style.get_font_desc('LargeSystemFont')
            else:
                font_desc = None

            draw_text_box_centered(ctx, treeview, width, height, text, font_desc)

        return False

    def enable_download_list_update(self):
        if not self.download_list_update_enabled:
            gobject.timeout_add(1500, self.update_downloads_list)
            self.download_list_update_enabled = True

    def on_btnCleanUpDownloads_clicked(self, button):
        model = self.download_status_model

        all_tasks = [(gtk.TreeRowReference(model, row.path), row[0]) for row in model]
        changed_episode_urls = []
        for row_reference, task in all_tasks:
            if task.status in (task.DONE, task.CANCELLED, task.FAILED):
                model.remove(model.get_iter(row_reference.get_path()))
                try:
                    # We don't "see" this task anymore - remove it;
                    # this is needed, so update_episode_list_icons()
                    # below gets the correct list of "seen" tasks
                    self.download_tasks_seen.remove(task)
                except KeyError, key_error:
                    log('Cannot remove task from "seen" list: %s', task, sender=self)
                changed_episode_urls.append(task.url)
                # Tell the task that it has been removed (so it can clean up)
                task.removed_from_list()

        # Tell the podcasts tab to update icons for our removed podcasts
        self.update_episode_list_icons(changed_episode_urls)

        # Tell the shownotes window that we have removed the episode
        if self.episode_shownotes_window is not None and \
                self.episode_shownotes_window.episode is not None and \
                self.episode_shownotes_window.episode.url in changed_episode_urls:
            self.episode_shownotes_window._download_status_changed(None)

        # Update the tab title and downloads list
        self.update_downloads_list()

    def on_tool_downloads_toggled(self, toolbutton):
        if toolbutton.get_active():
            self.wNotebook.set_current_page(1)
        else:
            self.wNotebook.set_current_page(0)

    def update_downloads_list(self):
        try:
            model = self.download_status_model

            downloading, failed, finished, queued, paused, others = 0, 0, 0, 0, 0, 0
            total_speed, total_size, done_size = 0, 0, 0

            # Keep a list of all download tasks that we've seen
            download_tasks_seen = set()

            # Remember the DownloadTask object for the episode that
            # has been opened in the episode shownotes dialog (if any)
            if self.episode_shownotes_window is not None:
                shownotes_episode = self.episode_shownotes_window.episode
                shownotes_task = None
            else:
                shownotes_episode = None
                shownotes_task = None

            # Do not go through the list of the model is not (yet) available
            if model is None:
                model = ()

            for row in model:
                self.download_status_model.request_update(row.iter)

                task = row[self.download_status_model.C_TASK]
                speed, size, status, progress = task.speed, task.total_size, task.status, task.progress

                total_size += size
                done_size += size*progress

                if shownotes_episode is not None and \
                        shownotes_episode.url == task.episode.url:
                    shownotes_task = task

                download_tasks_seen.add(task)

                if status == download.DownloadTask.DOWNLOADING:
                    downloading += 1
                    total_speed += speed
                elif status == download.DownloadTask.FAILED:
                    failed += 1
                elif status == download.DownloadTask.DONE:
                    finished += 1
                elif status == download.DownloadTask.QUEUED:
                    queued += 1
                elif status == download.DownloadTask.PAUSED:
                    paused += 1
                else:
                    others += 1

            # Remember which tasks we have seen after this run
            self.download_tasks_seen = download_tasks_seen

            if gpodder.ui.desktop:
                text = [_('Downloads')]
                if downloading + failed + finished + queued > 0:
                    s = []
                    if downloading > 0:
                        s.append(_('%d active') % downloading)
                    if failed > 0:
                        s.append(_('%d failed') % failed)
                    if finished > 0:
                        s.append(_('%d done') % finished)
                    if queued > 0:
                        s.append(_('%d queued') % queued)
                    text.append(' (' + ', '.join(s)+')')
                self.labelDownloads.set_text(''.join(text))
            elif gpodder.ui.diablo:
                sum = downloading + failed + finished + queued + paused + others
                if sum:
                    self.tool_downloads.set_label(_('Downloads (%d)') % sum)
                else:
                    self.tool_downloads.set_label(_('Downloads'))
            elif gpodder.ui.fremantle:
                if downloading + queued > 0:
                    self.button_downloads.set_value(_('%d active') % (downloading+queued))
                elif failed > 0:
                    self.button_downloads.set_value(_('%d failed') % failed)
                elif paused > 0:
                    self.button_downloads.set_value(_('%d paused') % paused)
                else:
                    self.button_downloads.set_value(_('None active'))

            title = [self.default_title]

            # We have to update all episodes/channels for which the status has
            # changed. Accessing task.status_changed has the side effect of
            # re-setting the changed flag, so we need to get the "changed" list
            # of tuples first and split it into two lists afterwards
            changed = [(task.url, task.podcast_url) for task in \
                    self.download_tasks_seen if task.status_changed]
            episode_urls = [episode_url for episode_url, channel_url in changed]
            channel_urls = [channel_url for episode_url, channel_url in changed]

            count = downloading + queued
            if count > 0:
                if count == 1:
                    title.append( _('downloading one file'))
                elif count > 1:
                    title.append( _('downloading %d files') % count)

                if total_size > 0:
                    percentage = 100.0*done_size/total_size
                else:
                    percentage = 0.0
                total_speed = util.format_filesize(total_speed)
                title[1] += ' (%d%%, %s/s)' % (percentage, total_speed)
                if self.tray_icon is not None:
                    # Update the tray icon status and progress bar
                    self.tray_icon.set_status(self.tray_icon.STATUS_DOWNLOAD_IN_PROGRESS, title[1])
                    self.tray_icon.draw_progress_bar(percentage/100.)
            elif self.last_download_count > 0:
                if self.tray_icon is not None:
                    # Update the tray icon status
                    self.tray_icon.set_status()
                    self.tray_icon.downloads_finished(self.download_tasks_seen)
                if gpodder.ui.diablo:
                    hildon.hildon_banner_show_information(self.gPodder, None, 'gPodder: %s' % _('All downloads finished'))
                log('All downloads have finished.', sender=self)
                if self.config.cmd_all_downloads_complete:
                    util.run_external_command(self.config.cmd_all_downloads_complete)
            self.last_download_count = count

            self.gPodder.set_title(' - '.join(title))

            self.update_episode_list_icons(episode_urls)
            if self.episode_shownotes_window is not None:
                if (shownotes_task and shownotes_task.url in episode_urls) or \
                        shownotes_task != self.episode_shownotes_window.task:
                    self.episode_shownotes_window._download_status_changed(shownotes_task)
                self.episode_shownotes_window._download_status_progress()
            self.play_or_download()
            if channel_urls:
                self.update_podcast_list_model(channel_urls)

            if not self.download_queue_manager.are_queued_or_active_tasks():
                self.download_list_update_enabled = False

            return self.download_list_update_enabled
        except Exception, e:
            log('Exception happened while updating download list.', sender=self, traceback=True)
            self.show_message('%s\n\n%s' % (_('Please report this problem and restart gPodder:'), str(e)), _('Unhandled exception'), important=True)
            # We return False here, so the update loop won't be called again,
            # that's why we require the restart of gPodder in the message.
            return False

    def on_config_changed(self, name, old_value, new_value):
        if name == 'show_toolbar' and gpodder.ui.desktop:
            self.toolbar.set_property('visible', new_value)
        elif name == 'episode_list_descriptions':
            self.update_episode_list_model()

    def on_treeview_query_tooltip(self, treeview, x, y, keyboard_tooltip, tooltip):
        # With get_bin_window, we get the window that contains the rows without
        # the header. The Y coordinate of this window will be the height of the
        # treeview header. This is the amount we have to subtract from the
        # event's Y coordinate to get the coordinate to pass to get_path_at_pos
        (x_bin, y_bin) = treeview.get_bin_window().get_position()
        y -= x_bin
        y -= y_bin
        (path, column, rx, ry) = treeview.get_path_at_pos( x, y) or (None,)*4

        if not getattr(treeview, TreeViewHelper.CAN_TOOLTIP) or (column is not None and column != treeview.get_columns()[0]):
            setattr(treeview, TreeViewHelper.LAST_TOOLTIP, None)
            return False

        if path is not None:
            model = treeview.get_model()
            iter = model.get_iter(path)
            role = getattr(treeview, TreeViewHelper.ROLE)

            if role == TreeViewHelper.ROLE_EPISODES:
                id = model.get_value(iter, EpisodeListModel.C_URL)
            elif role == TreeViewHelper.ROLE_PODCASTS:
                id = model.get_value(iter, PodcastListModel.C_URL)

            last_tooltip = getattr(treeview, TreeViewHelper.LAST_TOOLTIP)
            if last_tooltip is not None and last_tooltip != id:
                setattr(treeview, TreeViewHelper.LAST_TOOLTIP, None)
                return False
            setattr(treeview, TreeViewHelper.LAST_TOOLTIP, id)

            if role == TreeViewHelper.ROLE_EPISODES:
                description = model.get_value(iter, EpisodeListModel.C_DESCRIPTION_STRIPPED)
                if len(description) > 400:
                    description = description[:398]+'[...]'

                tooltip.set_text(description)
            elif role == TreeViewHelper.ROLE_PODCASTS:
                channel = model.get_value(iter, PodcastListModel.C_CHANNEL)
                channel.request_save_dir_size()
                diskspace_str = util.format_filesize(channel.save_dir_size, 0)
                error_str = model.get_value(iter, PodcastListModel.C_ERROR)
                if error_str:
                    error_str = _('Feedparser error: %s') % saxutils.escape(error_str.strip())
                    error_str = '<span foreground="#ff0000">%s</span>' % error_str
                table = gtk.Table(rows=3, columns=3)
                table.set_row_spacings(5)
                table.set_col_spacings(5)
                table.set_border_width(5)

                heading = gtk.Label()
                heading.set_alignment(0, 1)
                heading.set_markup('<b><big>%s</big></b>\n<small>%s</small>' % (saxutils.escape(channel.title), saxutils.escape(channel.url)))
                table.attach(heading, 0, 1, 0, 1)
                size_info = gtk.Label()
                size_info.set_alignment(1, 1)
                size_info.set_justify(gtk.JUSTIFY_RIGHT)
                size_info.set_markup('<b>%s</b>\n<small>%s</small>' % (diskspace_str, _('disk usage')))
                table.attach(size_info, 2, 3, 0, 1)

                table.attach(gtk.HSeparator(), 0, 3, 1, 2)

                if len(channel.description) < 500:
                    description = channel.description
                else:
                    pos = channel.description.find('\n\n')
                    if pos == -1 or pos > 500:
                        description = channel.description[:498]+'[...]'
                    else:
                        description = channel.description[:pos]

                description = gtk.Label(description)
                if error_str:
                    description.set_markup(error_str)
                description.set_alignment(0, 0)
                description.set_line_wrap(True)
                table.attach(description, 0, 3, 2, 3)

                table.show_all()
                tooltip.set_custom(table)

            return True

        setattr(treeview, TreeViewHelper.LAST_TOOLTIP, None)
        return False

    def treeview_allow_tooltips(self, treeview, allow):
        setattr(treeview, TreeViewHelper.CAN_TOOLTIP, allow)

    def update_m3u_playlist_clicked(self, widget):
        if self.active_channel is not None:
            self.active_channel.update_m3u_playlist()
            self.show_message(_('Updated M3U playlist in download folder.'), _('Updated playlist'), widget=self.treeChannels)

    def treeview_handle_context_menu_click(self, treeview, event):
        x, y = int(event.x), int(event.y)
        path, column, rx, ry = treeview.get_path_at_pos(x, y) or (None,)*4

        selection = treeview.get_selection()
        model, paths = selection.get_selected_rows()

        if path is None or (path not in paths and \
                event.button == self.context_menu_mouse_button):
            # We have right-clicked, but not into the selection,
            # assume we don't want to operate on the selection
            paths = []

        if path is not None and not paths and \
                event.button == self.context_menu_mouse_button:
            # No selection or clicked outside selection;
            # select the single item where we clicked
            treeview.grab_focus()
            treeview.set_cursor(path, column, 0)
            paths = [path]

        if not paths:
            # Unselect any remaining items (clicked elsewhere)
            if hasattr(treeview, 'is_rubber_banding_active'):
                if not treeview.is_rubber_banding_active():
                    selection.unselect_all()
            else:
                selection.unselect_all()

        return model, paths

    def treeview_downloads_show_context_menu(self, treeview, event):
        model, paths = self.treeview_handle_context_menu_click(treeview, event)
        if not paths:
            if not hasattr(treeview, 'is_rubber_banding_active'):
                return True
            else:
                return not treeview.is_rubber_banding_active()

        if event.button == self.context_menu_mouse_button:
            selected_tasks = [(gtk.TreeRowReference(model, path), model.get_value(model.get_iter(path), 0)) for path in paths]

            def make_menu_item(label, stock_id, tasks, status):
                # This creates a menu item for selection-wide actions
                def for_each_task_set_status(tasks, status):
                    changed_episode_urls = []
                    for row_reference, task in tasks:
                        if status is not None:
                            if status == download.DownloadTask.QUEUED:
                                # Only queue task when its paused/failed/cancelled
                                if task.status in (task.PAUSED, task.FAILED, task.CANCELLED):
                                    self.download_queue_manager.add_task(task)
                                    self.enable_download_list_update()
                            elif status == download.DownloadTask.CANCELLED:
                                # Cancelling a download allowed when downloading/queued
                                if task.status in (task.QUEUED, task.DOWNLOADING):
                                    task.status = status
                                # Cancelling paused downloads requires a call to .run()
                                elif task.status == task.PAUSED:
                                    task.status = status
                                    # Call run, so the partial file gets deleted
                                    task.run()
                            elif status == download.DownloadTask.PAUSED:
                                # Pausing a download only when queued/downloading
                                if task.status in (task.DOWNLOADING, task.QUEUED):
                                    task.status = status
                            else:
                                # We (hopefully) can simply set the task status here
                                task.status = status
                        else:
                            # Remove the selected task - cancel downloading/queued tasks
                            if task.status in (task.QUEUED, task.DOWNLOADING):
                                task.status = task.CANCELLED
                            model.remove(model.get_iter(row_reference.get_path()))
                            # Remember the URL, so we can tell the UI to update
                            try:
                                # We don't "see" this task anymore - remove it;
                                # this is needed, so update_episode_list_icons()
                                # below gets the correct list of "seen" tasks
                                self.download_tasks_seen.remove(task)
                            except KeyError, key_error:
                                log('Cannot remove task from "seen" list: %s', task, sender=self)
                            changed_episode_urls.append(task.url)
                            # Tell the task that it has been removed (so it can clean up)
                            task.removed_from_list()
                    # Tell the podcasts tab to update icons for our removed podcasts
                    self.update_episode_list_icons(changed_episode_urls)
                    # Update the tab title and downloads list
                    self.update_downloads_list()
                    return True
                item = gtk.ImageMenuItem(label)
                item.set_image(gtk.image_new_from_stock(stock_id, gtk.ICON_SIZE_MENU))
                item.connect('activate', lambda item: for_each_task_set_status(tasks, status))

                # Determine if we should disable this menu item
                for row_reference, task in tasks:
                    if status == download.DownloadTask.QUEUED:
                        if task.status not in (download.DownloadTask.PAUSED, \
                                download.DownloadTask.FAILED, \
                                download.DownloadTask.CANCELLED):
                            item.set_sensitive(False)
                            break
                    elif status == download.DownloadTask.CANCELLED:
                        if task.status not in (download.DownloadTask.PAUSED, \
                                download.DownloadTask.QUEUED, \
                                download.DownloadTask.DOWNLOADING):
                            item.set_sensitive(False)
                            break
                    elif status == download.DownloadTask.PAUSED:
                        if task.status not in (download.DownloadTask.QUEUED, \
                                download.DownloadTask.DOWNLOADING):
                            item.set_sensitive(False)
                            break
                    elif status is None:
                        if task.status not in (download.DownloadTask.CANCELLED, \
                                download.DownloadTask.FAILED, \
                                download.DownloadTask.DONE):
                            item.set_sensitive(False)
                            break

                return self.set_finger_friendly(item)

            menu = gtk.Menu()

            item = gtk.ImageMenuItem(_('Episode details'))
            item.set_image(gtk.image_new_from_stock(gtk.STOCK_INFO, gtk.ICON_SIZE_MENU))
            if len(selected_tasks) == 1:
                row_reference, task = selected_tasks[0]
                episode = task.episode
                item.connect('activate', lambda item: self.show_episode_shownotes(episode))
            else:
                item.set_sensitive(False)
            menu.append(self.set_finger_friendly(item))
            menu.append(gtk.SeparatorMenuItem())
            menu.append(make_menu_item(_('Download'), gtk.STOCK_GO_DOWN, selected_tasks, download.DownloadTask.QUEUED))
            menu.append(make_menu_item(_('Cancel'), gtk.STOCK_CANCEL, selected_tasks, download.DownloadTask.CANCELLED))
            menu.append(make_menu_item(_('Pause'), gtk.STOCK_MEDIA_PAUSE, selected_tasks, download.DownloadTask.PAUSED))
            menu.append(gtk.SeparatorMenuItem())
            menu.append(make_menu_item(_('Remove from list'), gtk.STOCK_REMOVE, selected_tasks, None))

            if gpodder.ui.maemo:
                # Because we open the popup on left-click for Maemo,
                # we also include a non-action to close the menu
                menu.append(gtk.SeparatorMenuItem())
                item = gtk.ImageMenuItem(_('Close this menu'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_CLOSE, gtk.ICON_SIZE_MENU))

                menu.append(self.set_finger_friendly(item))

            menu.show_all()
            menu.popup(None, None, None, event.button, event.time)
            return True

    def treeview_channels_show_context_menu(self, treeview, event):
        model, paths = self.treeview_handle_context_menu_click(treeview, event)
        if not paths:
            return True

        if event.button == 3:
            menu = gtk.Menu()

            ICON = lambda x: x

            item = gtk.ImageMenuItem( _('Open download folder'))
            item.set_image( gtk.image_new_from_icon_name(ICON('folder-open'), gtk.ICON_SIZE_MENU))
            item.connect('activate', lambda x: util.gui_open(self.active_channel.save_dir))
            menu.append( item)

            item = gtk.ImageMenuItem( _('Update Feed'))
            item.set_image(gtk.image_new_from_stock(gtk.STOCK_REFRESH, gtk.ICON_SIZE_MENU))
            item.connect('activate', self.on_itemUpdateChannel_activate )
            item.set_sensitive( not self.updating_feed_cache )
            menu.append( item)

            item = gtk.ImageMenuItem(_('Update M3U playlist'))
            item.set_image(gtk.image_new_from_stock(gtk.STOCK_REFRESH, gtk.ICON_SIZE_MENU))
            item.connect('activate', self.update_m3u_playlist_clicked)
            menu.append(item)

            if self.active_channel.link:
                item = gtk.ImageMenuItem(_('Visit website'))
                item.set_image(gtk.image_new_from_icon_name(ICON('web-browser'), gtk.ICON_SIZE_MENU))
                item.connect('activate', lambda w: util.open_website(self.active_channel.link))
                menu.append(item)

            if self.active_channel.channel_is_locked:
                item = gtk.ImageMenuItem(_('Allow deletion of all episodes'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_DIALOG_AUTHENTICATION, gtk.ICON_SIZE_MENU))
                item.connect('activate', self.on_channel_toggle_lock_activate)
                menu.append(self.set_finger_friendly(item))
            else:
                item = gtk.ImageMenuItem(_('Prohibit deletion of all episodes'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_DIALOG_AUTHENTICATION, gtk.ICON_SIZE_MENU))
                item.connect('activate', self.on_channel_toggle_lock_activate)
                menu.append(self.set_finger_friendly(item))


            menu.append( gtk.SeparatorMenuItem())

            item = gtk.ImageMenuItem(gtk.STOCK_EDIT)
            item.connect( 'activate', self.on_itemEditChannel_activate)
            menu.append( item)

            item = gtk.ImageMenuItem(gtk.STOCK_DELETE)
            item.connect( 'activate', self.on_itemRemoveChannel_activate)
            menu.append( item)

            menu.show_all()
            # Disable tooltips while we are showing the menu, so 
            # the tooltip will not appear over the menu
            self.treeview_allow_tooltips(self.treeChannels, False)
            menu.connect('deactivate', lambda menushell: self.treeview_allow_tooltips(self.treeChannels, True))
            menu.popup( None, None, None, event.button, event.time)

            return True

    def on_itemClose_activate(self, widget):
        if self.tray_icon is not None:
            self.iconify_main_window()
        else:
            self.on_gPodder_delete_event(widget)

    def cover_file_removed(self, channel_url):
        """
        The Cover Downloader calls this when a previously-
        available cover has been removed from the disk. We
        have to update our model to reflect this change.
        """
        self.podcast_list_model.delete_cover_by_url(channel_url)
    
    def cover_download_finished(self, channel_url, pixbuf):
        """
        The Cover Downloader calls this when it has finished
        downloading (or registering, if already downloaded)
        a new channel cover, which is ready for displaying.
        """
        self.podcast_list_model.add_cover_by_url(channel_url, pixbuf)

    def save_episode_as_file(self, episode):
        PRIVATE_FOLDER_ATTRIBUTE = '_save_episodes_as_file_folder'
        if episode.was_downloaded(and_exists=True):
            folder = getattr(self, PRIVATE_FOLDER_ATTRIBUTE, None)
            copy_from = episode.local_filename(create=False)
            assert copy_from is not None
            copy_to = episode.sync_filename(self.config.custom_sync_name_enabled, self.config.custom_sync_name)
            (result, folder) = self.show_copy_dialog(src_filename=copy_from, dst_filename=copy_to, dst_directory=folder)
            setattr(self, PRIVATE_FOLDER_ATTRIBUTE, folder)

    def copy_episodes_bluetooth(self, episodes):
        episodes_to_copy = [e for e in episodes if e.was_downloaded(and_exists=True)]

        def convert_and_send_thread(episode):
            for episode in episodes:
                filename = episode.local_filename(create=False)
                assert filename is not None
                destfile = os.path.join(tempfile.gettempdir(), \
                        util.sanitize_filename(episode.sync_filename(self.config.custom_sync_name_enabled, self.config.custom_sync_name)))
                (base, ext) = os.path.splitext(filename)
                if not destfile.endswith(ext):
                    destfile += ext

                try:
                    shutil.copyfile(filename, destfile)
                    util.bluetooth_send_file(destfile)
                except:
                    log('Cannot copy "%s" to "%s".', filename, destfile, sender=self)
                    self.notification(_('Error converting file.'), _('Bluetooth file transfer'), important=True)

                util.delete_file(destfile)

        threading.Thread(target=convert_and_send_thread, args=[episodes_to_copy]).start()

    def get_device_name(self):
        if self.config.device_type == 'ipod':
            return _('iPod')
        elif self.config.device_type in ('filesystem', 'mtp'):
            return _('MP3 player')
        else:
            return '(unknown device)'

    def _treeview_button_released(self, treeview, event):
        xpos, ypos = TreeViewHelper.get_button_press_event(treeview)
        dy = int(abs(event.y-ypos))
        dx = int(event.x-xpos)

        selection = treeview.get_selection()
        path = treeview.get_path_at_pos(int(event.x), int(event.y))
        if path is None or dy > 30:
            return (False, dx, dy)

        path, column, x, y = path
        selection.select_path(path)
        treeview.set_cursor(path)
        treeview.grab_focus()

        return (True, dx, dy)

    def treeview_channels_handle_gestures(self, treeview, event):
        if self.currently_updating:
            return False

        selected, dx, dy = self._treeview_button_released(treeview, event)

        if selected:
            if self.config.maemo_enable_gestures:
                if dx > 70:
                    self.on_itemUpdateChannel_activate()
                elif dx < -70:
                    self.on_itemEditChannel_activate(treeview)

        return False

    def treeview_available_handle_gestures(self, treeview, event):
        selected, dx, dy = self._treeview_button_released(treeview, event)

        if selected:
            if self.config.maemo_enable_gestures:
                if dx > 70:
                    self.on_playback_selected_episodes(None)
                    return True
                elif dx < -70:
                    self.on_shownotes_selected_episodes(None)
                    return True

            # Pass the event to the context menu handler for treeAvailable
            self.treeview_available_show_context_menu(treeview, event)

        return True

    def treeview_available_show_context_menu(self, treeview, event):
        model, paths = self.treeview_handle_context_menu_click(treeview, event)
        if not paths:
            if not hasattr(treeview, 'is_rubber_banding_active'):
                return True
            else:
                return not treeview.is_rubber_banding_active()

        if event.button == self.context_menu_mouse_button:
            episodes = self.get_selected_episodes()
            any_locked = any(e.is_locked for e in episodes)
            any_played = any(e.is_played for e in episodes)
            one_is_new = any(e.state == gpodder.STATE_NORMAL and not e.is_played for e in episodes)

            menu = gtk.Menu()

            (can_play, can_download, can_transfer, can_cancel, can_delete, open_instead_of_play) = self.play_or_download()

            if open_instead_of_play:
                item = gtk.ImageMenuItem(gtk.STOCK_OPEN)
            else:
                item = gtk.ImageMenuItem(gtk.STOCK_MEDIA_PLAY)

            item.set_sensitive(can_play)
            item.connect('activate', self.on_playback_selected_episodes)
            menu.append(self.set_finger_friendly(item))

            if not can_cancel:
                item = gtk.ImageMenuItem(_('Download'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_GO_DOWN, gtk.ICON_SIZE_MENU))
                item.set_sensitive(can_download)
                item.connect('activate', self.on_download_selected_episodes)
                menu.append(self.set_finger_friendly(item))
            else:
                item = gtk.ImageMenuItem(gtk.STOCK_CANCEL)
                item.connect('activate', self.on_item_cancel_download_activate)
                menu.append(self.set_finger_friendly(item))

            item = gtk.ImageMenuItem(gtk.STOCK_DELETE)
            item.set_sensitive(can_delete)
            item.connect('activate', self.on_btnDownloadedDelete_clicked)
            menu.append(self.set_finger_friendly(item))

            if one_is_new:
                item = gtk.ImageMenuItem(_('Do not download'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_DELETE, gtk.ICON_SIZE_MENU))
                item.connect('activate', lambda w: self.mark_selected_episodes_old())
                menu.append(self.set_finger_friendly(item))
            elif can_download:
                item = gtk.ImageMenuItem(_('Mark as new'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_ABOUT, gtk.ICON_SIZE_MENU))
                item.connect('activate', lambda w: self.mark_selected_episodes_new())
                menu.append(self.set_finger_friendly(item))

            ICON = lambda x: x

            # Ok, this probably makes sense to only display for downloaded files
            if can_play and not can_download:
                menu.append( gtk.SeparatorMenuItem())
                item = gtk.ImageMenuItem(_('Save to disk'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_SAVE_AS, gtk.ICON_SIZE_MENU))
                item.connect('activate', lambda w: [self.save_episode_as_file(e) for e in episodes])
                menu.append(self.set_finger_friendly(item))
                if self.bluetooth_available:
                    item = gtk.ImageMenuItem(_('Send via bluetooth'))
                    item.set_image(gtk.image_new_from_icon_name(ICON('bluetooth'), gtk.ICON_SIZE_MENU))
                    item.connect('activate', lambda w: self.copy_episodes_bluetooth(episodes))
                    menu.append(self.set_finger_friendly(item))
                if can_transfer:
                    item = gtk.ImageMenuItem(_('Transfer to %s') % self.get_device_name())
                    item.set_image(gtk.image_new_from_icon_name(ICON('multimedia-player'), gtk.ICON_SIZE_MENU))
                    item.connect('activate', lambda w: self.on_sync_to_ipod_activate(w, episodes))
                    menu.append(self.set_finger_friendly(item))

            if can_play:
                menu.append( gtk.SeparatorMenuItem())
                if any_played:
                    item = gtk.ImageMenuItem(_('Mark as unplayed'))
                    item.set_image( gtk.image_new_from_stock( gtk.STOCK_CANCEL, gtk.ICON_SIZE_MENU))
                    item.connect( 'activate', lambda w: self.on_item_toggle_played_activate( w, False, False))
                    menu.append(self.set_finger_friendly(item))
                else:
                    item = gtk.ImageMenuItem(_('Mark as played'))
                    item.set_image( gtk.image_new_from_stock( gtk.STOCK_APPLY, gtk.ICON_SIZE_MENU))
                    item.connect( 'activate', lambda w: self.on_item_toggle_played_activate( w, False, True))
                    menu.append(self.set_finger_friendly(item))

                if any_locked:
                    item = gtk.ImageMenuItem(_('Allow deletion'))
                    item.set_image(gtk.image_new_from_stock(gtk.STOCK_DIALOG_AUTHENTICATION, gtk.ICON_SIZE_MENU))
                    item.connect('activate', lambda w: self.on_item_toggle_lock_activate( w, False, False))
                    menu.append(self.set_finger_friendly(item))
                else:
                    item = gtk.ImageMenuItem(_('Prohibit deletion'))
                    item.set_image(gtk.image_new_from_stock(gtk.STOCK_DIALOG_AUTHENTICATION, gtk.ICON_SIZE_MENU))
                    item.connect('activate', lambda w: self.on_item_toggle_lock_activate( w, False, True))
                    menu.append(self.set_finger_friendly(item))

            menu.append(gtk.SeparatorMenuItem())
            # Single item, add episode information menu item
            item = gtk.ImageMenuItem(_('Episode details'))
            item.set_image(gtk.image_new_from_stock( gtk.STOCK_INFO, gtk.ICON_SIZE_MENU))
            item.connect('activate', lambda w: self.show_episode_shownotes(episodes[0]))
            menu.append(self.set_finger_friendly(item))

            # If we have it, also add episode website link
            if episodes[0].link and episodes[0].link != episodes[0].url:
                item = gtk.ImageMenuItem(_('Visit website'))
                item.set_image(gtk.image_new_from_icon_name(ICON('web-browser'), gtk.ICON_SIZE_MENU))
                item.connect('activate', lambda w: util.open_website(episodes[0].link))
                menu.append(self.set_finger_friendly(item))
            
            if gpodder.ui.maemo:
                # Because we open the popup on left-click for Maemo,
                # we also include a non-action to close the menu
                menu.append(gtk.SeparatorMenuItem())
                item = gtk.ImageMenuItem(_('Close this menu'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_CLOSE, gtk.ICON_SIZE_MENU))
                menu.append(self.set_finger_friendly(item))

            menu.show_all()
            # Disable tooltips while we are showing the menu, so 
            # the tooltip will not appear over the menu
            self.treeview_allow_tooltips(self.treeAvailable, False)
            menu.connect('deactivate', lambda menushell: self.treeview_allow_tooltips(self.treeAvailable, True))
            menu.popup( None, None, None, event.button, event.time)

            return True

    def set_title(self, new_title):
        if not gpodder.ui.fremantle:
            self.default_title = new_title
            self.gPodder.set_title(new_title)

    def update_episode_list_icons(self, urls=None, selected=False, all=False):
        """
        Updates the status icons in the episode list.

        If urls is given, it should be a list of URLs
        of episodes that should be updated.

        If urls is None, set ONE OF selected, all to
        True (the former updates just the selected
        episodes and the latter updates all episodes).
        """
        if urls is not None:
            # We have a list of URLs to walk through
            self.episode_list_model.update_by_urls(urls, \
                    self.episode_is_downloading, \
                    self.config.episode_list_descriptions and \
                    gpodder.ui.desktop)
        elif selected and not all:
            # We should update all selected episodes
            selection = self.treeAvailable.get_selection()
            model, paths = selection.get_selected_rows()
            for path in reversed(paths):
                iter = model.get_iter(path)
                self.episode_list_model.update_by_filter_iter(iter, \
                        self.episode_is_downloading, \
                        self.config.episode_list_descriptions and \
                        gpodder.ui.desktop)
        elif all and not selected:
            # We update all (even the filter-hidden) episodes
            self.episode_list_model.update_all(\
                    self.episode_is_downloading, \
                    self.config.episode_list_descriptions and \
                    gpodder.ui.desktop)
        else:
            # Wrong/invalid call - have to specify at least one parameter
            raise ValueError('Invalid call to update_episode_list_icons')

    def episode_list_status_changed(self, episodes):
        self.update_episode_list_icons(set(e.url for e in episodes))
        self.update_podcast_list_model(set(e.channel.url for e in episodes))
        self.db.commit()

    def clean_up_downloads(self, delete_partial=False):
        # Clean up temporary files left behind by old gPodder versions
        temporary_files = glob.glob('%s/*/.tmp-*' % self.config.download_dir)

        if delete_partial:
            temporary_files += glob.glob('%s/*/*.partial' % self.config.download_dir)

        for tempfile in temporary_files:
            util.delete_file(tempfile)

        # Clean up empty download folders and abandoned download folders
        download_dirs = glob.glob(os.path.join(self.config.download_dir, '*'))
        for ddir in download_dirs:
            if os.path.isdir(ddir) and False: # FIXME not db.channel_foldername_exists(os.path.basename(ddir)):
                globr = glob.glob(os.path.join(ddir, '*'))
                if len(globr) == 0 or (len(globr) == 1 and globr[0].endswith('/cover')):
                    log('Stale download directory found: %s', os.path.basename(ddir), sender=self)
                    shutil.rmtree(ddir, ignore_errors=True)

    def streaming_possible(self):
        return self.config.player and \
               self.config.player != 'default' and \
               gpodder.ui.desktop

    def playback_episodes_for_real(self, episodes):
        groups = collections.defaultdict(list)
        for episode in episodes:
            file_type = episode.file_type()
            if file_type == 'video' and self.config.videoplayer and \
                    self.config.videoplayer != 'default':
                player = self.config.videoplayer
                if gpodder.ui.diablo:
                    # Use the wrapper script if it's installed to crop 3GP YouTube
                    # videos to fit the screen (looks much nicer than w/ black border)
                    if player == 'mplayer' and util.find_command('gpodder-mplayer'):
                        player = 'gpodder-mplayer'
            elif file_type == 'audio' and self.config.player and \
                    self.config.player != 'default':
                player = self.config.player
            else:
                player = 'default'

            if file_type not in ('audio', 'video') or \
              (file_type == 'audio' and not self.config.audio_played_dbus) or \
              (file_type == 'video' and not self.config.video_played_dbus):
                # Mark episode as played in the database
                episode.mark(is_played=True)

            filename = episode.local_filename(create=False)
            if filename is None or not os.path.exists(filename):
                filename = episode.url
            groups[player].append(filename)

        # Open episodes with system default player
        if 'default' in groups:
            for filename in groups['default']:
                log('Opening with system default: %s', filename, sender=self)
                util.gui_open(filename)
            del groups['default']

        # For each type now, go and create play commands
        for group in groups:
            for command in util.format_desktop_command(group, groups[group]):
                log('Executing: %s', repr(command), sender=self)
                subprocess.Popen(command)

    def playback_episodes(self, episodes):
        if gpodder.ui.maemo:
            if len(episodes) == 1:
                text = _('Opening %s') % episodes[0].title
            else:
                text = _('Opening %d episodes') % len(episodes)

            if gpodder.ui.diablo:
                banner = hildon.hildon_banner_show_animation(self.gPodder, None, text)
            elif gpodder.ui.fremantle:
                banner = hildon.hildon_banner_show_animation(self.gPodder, '', text)

            def destroy_banner_later(banner):
                banner.destroy()
                return False
            gobject.timeout_add(5000, destroy_banner_later, banner)

        episodes = [e for e in episodes if \
                e.was_downloaded(and_exists=True) or self.streaming_possible()]

        try:
            self.playback_episodes_for_real(episodes)
        except Exception, e:
            log('Error in playback!', sender=self, traceback=True)
            self.show_message( _('Please check your media player settings in the preferences dialog.'), _('Error opening player'), widget=self.toolPreferences)

        channel_urls = set()
        episode_urls = set()
        for episode in episodes:
            channel_urls.add(episode.channel.url)
            episode_urls.add(episode.url)
        self.update_episode_list_icons(episode_urls)
        self.update_podcast_list_model(channel_urls)

    def play_or_download(self):
        if not gpodder.ui.fremantle:
            if self.wNotebook.get_current_page() > 0:
                if gpodder.ui.desktop:
                    self.toolCancel.set_sensitive(True)
                return

        if self.currently_updating:
            return (False, False, False, False, False, False)

        ( can_play, can_download, can_transfer, can_cancel, can_delete ) = (False,)*5
        ( is_played, is_locked ) = (False,)*2

        open_instead_of_play = False

        selection = self.treeAvailable.get_selection()
        if selection.count_selected_rows() > 0:
            (model, paths) = selection.get_selected_rows()
         
            for path in paths:
                episode = model.get_value(model.get_iter(path), EpisodeListModel.C_EPISODE)

                if episode.file_type() not in ('audio', 'video'):
                    open_instead_of_play = True

                if episode.was_downloaded():
                    can_play = episode.was_downloaded(and_exists=True)
                    can_delete = True
                    is_played = episode.is_played
                    is_locked = episode.is_locked
                    if not can_play:
                        can_download = True
                else:
                    if self.episode_is_downloading(episode):
                        can_cancel = True
                    else:
                        can_download = True

            can_download = can_download and not can_cancel
            can_play = self.streaming_possible() or (can_play and not can_cancel and not can_download)
            can_transfer = can_play and self.config.device_type != 'none' and not can_cancel and not can_download and not open_instead_of_play

        if gpodder.ui.desktop:
            if open_instead_of_play:
                self.toolPlay.set_stock_id(gtk.STOCK_OPEN)
            else:
                self.toolPlay.set_stock_id(gtk.STOCK_MEDIA_PLAY)
            self.toolPlay.set_sensitive( can_play)
            self.toolDownload.set_sensitive( can_download)
            self.toolTransfer.set_sensitive( can_transfer)
            self.toolCancel.set_sensitive( can_cancel)

        if not gpodder.ui.fremantle:
            self.item_cancel_download.set_sensitive(can_cancel)
            self.itemDownloadSelected.set_sensitive(can_download)
            self.itemOpenSelected.set_sensitive(can_play)
            self.itemPlaySelected.set_sensitive(can_play)
            self.itemDeleteSelected.set_sensitive(can_play and not can_download)
            self.item_toggle_played.set_sensitive(can_play)
            self.item_toggle_lock.set_sensitive(can_play)
            self.itemOpenSelected.set_visible(open_instead_of_play)
            self.itemPlaySelected.set_visible(not open_instead_of_play)

        return (can_play, can_download, can_transfer, can_cancel, can_delete, open_instead_of_play)

    def on_cbMaxDownloads_toggled(self, widget, *args):
        self.spinMaxDownloads.set_sensitive(self.cbMaxDownloads.get_active())

    def on_cbLimitDownloads_toggled(self, widget, *args):
        self.spinLimitDownloads.set_sensitive(self.cbLimitDownloads.get_active())

    def episode_new_status_changed(self, urls):
        self.update_podcast_list_model()
        self.update_episode_list_icons(urls)

    def update_podcast_list_model(self, urls=None, selected=False, select_url=None):
        """Update the podcast list treeview model

        If urls is given, it should list the URLs of each
        podcast that has to be updated in the list.

        If selected is True, only update the model contents
        for the currently-selected podcast - nothing more.

        The caller can optionally specify "select_url",
        which is the URL of the podcast that is to be
        selected in the list after the update is complete.
        This only works if the podcast list has to be
        reloaded; i.e. something has been added or removed
        since the last update of the podcast list).
        """
        selection = self.treeChannels.get_selection()
        model, iter = selection.get_selected()

        if selected:
            # very cheap! only update selected channel
            if iter is not None:
                self.podcast_list_model.update_by_filter_iter(iter)
        elif not self.channel_list_changed:
            # we can keep the model, but have to update some
            if urls is None:
                # still cheaper than reloading the whole list
                self.podcast_list_model.update_all()
            else:
                # ok, we got a bunch of urls to update
                self.podcast_list_model.update_by_urls(urls)
        else:
            if model and iter and select_url is None:
                # Get the URL of the currently-selected podcast
                select_url = model.get_value(iter, PodcastListModel.C_URL)

            # Update the podcast list model with new channels
            self.podcast_list_model.set_channels(self.channels)

            try:
                selected_iter = model.get_iter_first()
                # Find the previously-selected URL in the new
                # model if we have an URL (else select first)
                if select_url is not None:
                    pos = model.get_iter_first()
                    while pos is not None:
                        url = model.get_value(pos, PodcastListModel.C_URL)
                        if url == select_url:
                            selected_iter = pos
                            break
                        pos = model.iter_next(pos)

                if not gpodder.ui.fremantle:
                    if selected_iter is not None:
                        selection.select_iter(selected_iter)
                    self.on_treeChannels_cursor_changed(self.treeChannels)
            except:
                log('Cannot select podcast in list', traceback=True, sender=self)
        self.channel_list_changed = False

    def episode_is_downloading(self, episode):
        """Returns True if the given episode is being downloaded at the moment"""
        if episode is None:
            return False

        return episode.url in (task.url for task in self.download_tasks_seen if task.status in (task.DOWNLOADING, task.QUEUED, task.PAUSED))

    def update_episode_list_model(self):
        if self.channels and self.active_channel is not None:
            if gpodder.ui.diablo:
                banner = hildon.hildon_banner_show_animation(self.gPodder, None, _('Loading episodes'))
            else:
                banner = None

            if gpodder.ui.fremantle:
                hildon.hildon_gtk_window_set_progress_indicator(self.episodes_window.main_window, True)

            self.currently_updating = True
            self.episode_list_model.clear()
            def do_update_episode_list_model():
                self.episode_list_model.add_from_channel(\
                        self.active_channel, \
                        self.episode_is_downloading, \
                        self.config.episode_list_descriptions \
                          and gpodder.ui.desktop)

                def on_episode_list_model_updated():
                    if banner is not None:
                        banner.destroy()
                    if gpodder.ui.fremantle:
                        hildon.hildon_gtk_window_set_progress_indicator(self.episodes_window.main_window, False)
                    self.treeAvailable.columns_autosize()
                    self.currently_updating = False
                    self.play_or_download()
                util.idle_add(on_episode_list_model_updated)
            threading.Thread(target=do_update_episode_list_model).start()
        else:
            self.episode_list_model.clear()
    
    def offer_new_episodes(self, channels=None):
        new_episodes = self.get_new_episodes(channels)
        if new_episodes:
            self.new_episodes_show(new_episodes)
            return True
        return False

    def add_podcast_list(self, urls, auth_tokens=None):
        """Subscribe to a list of podcast given their URLs

        If auth_tokens is given, it should be a dictionary
        mapping URLs to (username, password) tuples."""

        if auth_tokens is None:
            auth_tokens = {}

        # Sort and split the URL list into five buckets
        queued, failed, existing, worked, authreq = [], [], [], [], []
        for input_url in urls:
            url = util.normalize_feed_url(input_url)
            if url is None:
                # Fail this one because the URL is not valid
                failed.append(input_url)
            elif self.podcast_list_model.get_filter_path_from_url(url) is not None:
                # A podcast already exists in the list for this URL
                existing.append(url)
            else:
                # This URL has survived the first round - queue for add
                queued.append(url)
                if url != input_url and input_url in auth_tokens:
                    auth_tokens[url] = auth_tokens[input_url]

        error_messages = {}
        redirections = {}

        progress = ProgressIndicator(_('Adding podcasts'), \
                _('Please wait while episode information is downloaded.'), \
                parent=self.main_window)

        def on_after_update():
            progress.on_finished()
            # Report already-existing subscriptions to the user
            if existing:
                title = _('Existing subscriptions skipped')
                message = _('You are already subscribed to these podcasts:') \
                     + '\n\n' + '\n'.join(saxutils.escape(url) for url in existing)
                self.show_message(message, title, widget=self.treeChannels)

            # Report subscriptions that require authentication
            if authreq:
                retry_podcasts = {}
                for url in authreq:
                    title = _('Podcast requires authentication')
                    message = _('Please login to %s:') % (saxutils.escape(url),)
                    success, auth_tokens = self.show_login_dialog(title, message)
                    if success:
                        retry_podcasts[url] = auth_tokens
                    else:
                        # Stop asking the user for more login data
                        retry_podcasts = {}
                        for url in authreq:
                            error_messages[url] = _('Authentication failed')
                            failed.append(url)
                        break

                # If we have authentication data to retry, do so here
                if retry_podcasts:
                    self.add_podcast_list(retry_podcasts.keys(), retry_podcasts)

            # Report website redirections
            for url in redirections:
                title = _('Website redirection detected')
                message = _('The URL %s redirects to %s.') \
                        + '\n\n' + _('Do you want to visit the website now?')
                message = message % (url, redirections[url])
                if self.show_confirmation(message, title):
                    util.open_website(url)
                else:
                    break

            # Report failed subscriptions to the user
            if failed:
                title = _('Could not add some podcasts')
                message = _('Some podcasts could not be added to your list:') \
                     + '\n\n' + '\n'.join(saxutils.escape('%s: %s' % (url, \
                        error_messages.get(url, _('Unknown')))) for url in failed)
                self.show_message(message, title, important=True)

            # If at least one podcast has been added, save and update all
            if self.channel_list_changed:
                self.save_channels_opml()

                # If only one podcast was added, select it after the update
                if len(worked) == 1:
                    url = worked[0]
                else:
                    url = None

                # Update the list of subscribed podcasts
                self.update_feed_cache(force_update=False, select_url_afterwards=url)
                self.update_podcasts_tab()

                # Offer to download new episodes
                self.offer_new_episodes(channels=[c for c in self.channels if c.url in worked])

        def thread_proc():
            # After the initial sorting and splitting, try all queued podcasts
            length = len(queued)
            for index, url in enumerate(queued):
                progress.on_progress(float(index)/float(length))
                progress.on_message(url)
                log('QUEUE RUNNER: %s', url, sender=self)
                try:
                    # The URL is valid and does not exist already - subscribe!
                    channel = PodcastChannel.load(self.db, url=url, create=True, \
                            authentication_tokens=auth_tokens.get(url, None), \
                            max_episodes=self.config.max_episodes_per_feed, \
                            download_dir=self.config.download_dir)

                    try:
                        username, password = util.username_password_from_url(url)
                    except ValueError, ve:
                        username, password = (None, None)

                    if username is not None and channel.username is None and \
                            password is not None and channel.password is None:
                        channel.username = username
                        channel.password = password
                        channel.save()

                    self._update_cover(channel)
                except feedcore.AuthenticationRequired:
                    if url in auth_tokens:
                        # Fail for wrong authentication data
                        error_messages[url] = _('Authentication failed')
                        failed.append(url)
                    else:
                        # Queue for login dialog later
                        authreq.append(url)
                    continue
                except feedcore.WifiLogin, error:
                    redirections[url] = error.data
                    failed.append(url)
                    error_messages[url] = _('Redirection detected')
                    continue
                except Exception, e:
                    log('Subscription error: %s', e, traceback=True, sender=self)
                    error_messages[url] = str(e)
                    failed.append(url)
                    continue

                assert channel is not None
                worked.append(channel.url)
                self.channels.append(channel)
                self.channel_list_changed = True
            util.idle_add(on_after_update)
        threading.Thread(target=thread_proc).start()

    def save_channels_opml(self):
        exporter = opml.Exporter(gpodder.subscription_file)
        return exporter.write(self.channels)

    def update_feed_cache_finish_callback(self, updated_urls=None, select_url_afterwards=None):
        self.db.commit()
        self.updating_feed_cache = False

        self.channels = PodcastChannel.load_from_db(self.db, self.config.download_dir)
        self.channel_list_changed = True
        self.update_podcast_list_model(select_url=select_url_afterwards)

        # Only search for new episodes in podcasts that have been
        # updated, not in other podcasts (for single-feed updates)
        episodes = self.get_new_episodes([c for c in self.channels if c.url in updated_urls])

        if gpodder.ui.fremantle:
            if self._fremantle_update_banner is not None:
                self._fremantle_update_banner.destroy()
            hildon.hildon_gtk_window_set_progress_indicator(self.main_window, False)
            hildon.hildon_gtk_window_set_progress_indicator(self.podcasts_window.main_window, False)
            if episodes:
                self.new_episodes_show(episodes)
            else:
                self.show_message(_('No new episodes. Please check for new episodes later.'), important=True)
            return

        if self.tray_icon:
            self.tray_icon.set_status()

        if self.feed_cache_update_cancelled:
            # The user decided to abort the feed update
            self.show_update_feeds_buttons()
        elif not episodes:
            # Nothing new here - but inform the user
            self.pbFeedUpdate.set_fraction(1.0)
            self.pbFeedUpdate.set_text(_('No new episodes'))
            self.feed_cache_update_cancelled = True
            self.btnCancelFeedUpdate.show()
            self.btnCancelFeedUpdate.set_sensitive(True)
            if gpodder.ui.maemo:
                # btnCancelFeedUpdate is a ToolButton on Maemo
                self.btnCancelFeedUpdate.set_stock_id(gtk.STOCK_APPLY)
            else:
                # btnCancelFeedUpdate is a normal gtk.Button
                self.btnCancelFeedUpdate.set_image(gtk.image_new_from_stock(gtk.STOCK_APPLY, gtk.ICON_SIZE_BUTTON))
        else:
            # New episodes are available
            self.pbFeedUpdate.set_fraction(1.0)
            # Are we minimized and should we auto download?
            if (self.is_iconified() and (self.config.auto_download == 'minimized')) or (self.config.auto_download == 'always'):
                self.download_episode_list(episodes)
                if len(episodes) == 1:
                    title = _('Downloading one new episode.')
                else:
                    title = _('Downloading %d new episodes.') % len(episodes)

                if not gpodder.ui.fremantle:
                    self.show_message(title, _('New episodes available'), widget=self.labelDownloads)
                self.show_update_feeds_buttons()
            else:
                self.show_update_feeds_buttons()
                # New episodes are available and we are not minimized
                if not self.config.do_not_show_new_episodes_dialog:
                    self.new_episodes_show(episodes, notification=True)
                else:
                    if len(episodes) == 1:
                        message = _('One new episode is available for download') 
                    else:
                        message = _('%i new episodes are available for download' % len(episodes))
                    
                    self.pbFeedUpdate.set_text(message)

    def _update_cover(self, channel):
        if channel is not None and not os.path.exists(channel.cover_file) and channel.image:
            self.cover_downloader.request_cover(channel)

    def update_feed_cache_proc(self, channels, select_url_afterwards):
        total = len(channels)

        for updated, channel in enumerate(channels):
            if not self.feed_cache_update_cancelled:
                try:
                    # Update if timeout is not reached or we update a single podcast or skipping is disabled
                    if channel.query_automatic_update() or total == 1 or not self.config.feed_update_skipping:
                        channel.update(max_episodes=self.config.max_episodes_per_feed)
                    else:
                        log('Skipping update of %s (see feed_update_skipping)', channel.title, sender=self)
                    self._update_cover(channel)
                except Exception, e:
                    self.notification(_('There has been an error updating %s: %s') % (saxutils.escape(channel.url), saxutils.escape(str(e))), _('Error while updating feed'), widget=self.treeChannels)
                    log('Error: %s', str(e), sender=self, traceback=True)

            if self.feed_cache_update_cancelled:
                break

            if gpodder.ui.fremantle:
                if self._fremantle_update_banner is not None:
                    progression = _('%d of %d podcasts updated') % (updated, total)
                    util.idle_add(self._fremantle_update_banner.set_text, progression)
                    util.idle_add(self._fremantle_update_banner.show)
                continue

            # By the time we get here the update may have already been cancelled
            if not self.feed_cache_update_cancelled:
                def update_progress():
                    progression = _('Updated %s (%d/%d)') % (channel.title, updated, total)
                    self.pbFeedUpdate.set_text(progression)
                    if self.tray_icon:
                        self.tray_icon.set_status(self.tray_icon.STATUS_UPDATING_FEED_CACHE, progression)
                    self.pbFeedUpdate.set_fraction(float(updated)/float(total))
                util.idle_add(update_progress)

        updated_urls = [c.url for c in channels]
        util.idle_add(self.update_feed_cache_finish_callback, updated_urls, select_url_afterwards)

    def show_update_feeds_buttons(self):
        # Make sure that the buttons for updating feeds
        # appear - this should happen after a feed update
        if gpodder.ui.maemo:
            self.btnUpdateSelectedFeed.show()
            self.toolFeedUpdateProgress.hide()
            self.btnCancelFeedUpdate.hide()
            self.btnCancelFeedUpdate.set_is_important(False)
            self.btnCancelFeedUpdate.set_stock_id(gtk.STOCK_CLOSE)
            self.toolbarSpacer.set_expand(True)
            self.toolbarSpacer.set_draw(False)
        else:
            self.hboxUpdateFeeds.hide()
        self.btnUpdateFeeds.show()
        self.itemUpdate.set_sensitive(True)
        self.itemUpdateChannel.set_sensitive(True)

    def on_btnCancelFeedUpdate_clicked(self, widget):
        if not self.feed_cache_update_cancelled:
            self.pbFeedUpdate.set_text(_('Cancelling...'))
            self.feed_cache_update_cancelled = True
            self.btnCancelFeedUpdate.set_sensitive(False)
        else:
            self.show_update_feeds_buttons()

    def update_feed_cache(self, channels=None, force_update=True, select_url_afterwards=None):
        if self.updating_feed_cache: 
            return

        if not force_update:
            self.channels = PodcastChannel.load_from_db(self.db, self.config.download_dir)
            self.channel_list_changed = True
            self.update_podcast_list_model(select_url=select_url_afterwards)
            return
        
        self.updating_feed_cache = True

        if channels is None:
            channels = self.channels

        if gpodder.ui.fremantle:
            hildon.hildon_gtk_window_set_progress_indicator(self.main_window, True)
            hildon.hildon_gtk_window_set_progress_indicator(self.podcasts_window.main_window, True)
            self._fremantle_update_banner = hildon.hildon_banner_show_animation(self.main_window, \
                '', _('Updating podcast feeds'))
        else:
            self.itemUpdate.set_sensitive(False)
            self.itemUpdateChannel.set_sensitive(False)

            if self.tray_icon:
                self.tray_icon.set_status(self.tray_icon.STATUS_UPDATING_FEED_CACHE)
            
            if len(channels) == 1:
                text = _('Updating "%s"...') % channels[0].title
            else:
                text = _('Updating %d feeds...') % len(channels)
            self.pbFeedUpdate.set_text(text)
            self.pbFeedUpdate.set_fraction(0)

            self.feed_cache_update_cancelled = False
            self.btnCancelFeedUpdate.show()
            self.btnCancelFeedUpdate.set_sensitive(True)
            if gpodder.ui.maemo:
                self.toolbarSpacer.set_expand(False)
                self.toolbarSpacer.set_draw(True)
                self.btnUpdateSelectedFeed.hide()
                self.toolFeedUpdateProgress.show_all()
            else:
                self.btnCancelFeedUpdate.set_image(gtk.image_new_from_stock(gtk.STOCK_STOP, gtk.ICON_SIZE_BUTTON))
                self.hboxUpdateFeeds.show_all()
            self.btnUpdateFeeds.hide()

        args = (channels, select_url_afterwards)
        threading.Thread(target=self.update_feed_cache_proc, args=args).start()

    def on_gPodder_delete_event(self, widget, *args):
        """Called when the GUI wants to close the window
        Displays a confirmation dialog (and closes/hides gPodder)
        """

        downloading = self.download_status_model.are_downloads_in_progress()

        # Only iconify if we are using the window's "X" button,
        # but not when we are using "Quit" in the menu or toolbar
        if not self.config.on_quit_ask and self.config.on_quit_systray and self.tray_icon and widget.get_name() not in ('toolQuit', 'itemQuit'):
            self.iconify_main_window()
        elif self.config.on_quit_ask or downloading:
            if gpodder.ui.maemo:
                result = self.show_confirmation(_('Do you really want to quit gPodder now?'))
                if result:
                    self.close_gpodder()
                else:
                    return True
            dialog = gtk.MessageDialog(self.gPodder, gtk.DIALOG_MODAL, gtk.MESSAGE_QUESTION, gtk.BUTTONS_NONE)
            dialog.add_button(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
            quit_button = dialog.add_button(gtk.STOCK_QUIT, gtk.RESPONSE_CLOSE)

            title = _('Quit gPodder')
            if downloading:
                message = _('You are downloading episodes. You can resume downloads the next time you start gPodder. Do you want to quit now?')
            else:
                message = _('Do you really want to quit gPodder now?')

            dialog.set_title(title)
            dialog.set_markup('<span weight="bold" size="larger">%s</span>\n\n%s'%(title, message))
            if not downloading:
                cb_ask = gtk.CheckButton(_("Don't ask me again"))
                dialog.vbox.pack_start(cb_ask)
                cb_ask.show_all()

            quit_button.grab_focus()
            result = dialog.run()
            dialog.destroy()

            if result == gtk.RESPONSE_CLOSE:
                if not downloading and cb_ask.get_active() == True:
                    self.config.on_quit_ask = False
                self.close_gpodder()
        else:
            self.close_gpodder()

        return True

    def close_gpodder(self):
        """ clean everything and exit properly
        """
        if self.channels:
            if self.save_channels_opml():
                if self.config.my_gpodder_autoupload:
                    log('Uploading to my.gpodder.org on close', sender=self)
                    util.idle_add(self.on_upload_to_mygpo, None)
            else:
                self.show_message(_('Please check your permissions and free disk space.'), _('Error saving podcast list'), important=True)

        self.gPodder.hide()

        if self.tray_icon is not None:
            self.tray_icon.set_visible(False)

        # Notify all tasks to to carry out any clean-up actions
        self.download_status_model.tell_all_tasks_to_quit()

        while gtk.events_pending():
            gtk.main_iteration(False)

        self.db.close()

        self.quit()
        sys.exit(0)

    def get_old_episodes(self):
        episodes = []
        for channel in self.channels:
            for episode in channel.get_downloaded_episodes():
                if episode.age_in_days() > self.config.episode_old_age and \
                        not episode.is_locked and episode.is_played:
                    episodes.append(episode)
        return episodes

    def delete_episode_list(self, episodes, confirm=True):
        if not episodes:
            return

        count = len(episodes)

        if count == 1:
            episode = episodes[0]
            if episode.is_locked:
                title = _('%s is locked') % saxutils.escape(episode.title)
                message = _('You cannot delete this locked episode. You must unlock it before you can delete it.')
                self.notification(message, title, widget=self.treeAvailable)
                return

            title = _('Remove %s?') % saxutils.escape(episode.title)
            message = _("If you remove this episode, it will be deleted from your computer. If you want to listen to this episode again, you will have to re-download it.")
        else:
            title = _('Remove %d episodes?') % count
            message = _('If you remove these episodes, they will be deleted from your computer. If you want to listen to any of these episodes again, you will have to re-download the episodes in question.')

        locked_count = sum(int(e.is_locked) for e in episodes if e.is_locked is not None)

        if count == locked_count:
            title = _('Episodes are locked')
            message = _('The selected episodes are locked. Please unlock the episodes that you want to delete before trying to delete them.')
            self.notification(message, title, widget=self.treeAvailable)
            return
        elif locked_count > 0:
            title = _('Remove %d out of %d episodes?') % (count-locked_count, count)
            message = _('The selection contains locked episodes that will not be deleted. If you want to listen to the deleted episodes, you will have to re-download them.')

        if confirm and not self.show_confirmation(message, title):
            return

        episode_urls = set()
        channel_urls = set()
        for episode in episodes:
            if episode.is_locked:
                log('Not deleting episode (is locked): %s', episode.title)
            else:
                log('Deleting episode: %s', episode.title)
                episode.delete_from_disk()
                episode_urls.add(episode.url)
                channel_urls.add(episode.channel.url)

                # Tell the shownotes window that we have removed the episode
                if self.episode_shownotes_window is not None and \
                        self.episode_shownotes_window.episode is not None and \
                        self.episode_shownotes_window.episode.url == episode.url:
                    self.episode_shownotes_window._download_status_changed(None)

        # Episodes have been deleted - persist the database
        self.db.commit()

        self.update_episode_list_icons(episode_urls)
        self.update_podcast_list_model(channel_urls)
        self.play_or_download()

    def on_itemRemoveOldEpisodes_activate( self, widget):
        if gpodder.ui.maemo:
            columns = (
                ('maemo_remove_markup', None, None, _('Episode')),
            )
        else:
            columns = (
                ('title_markup', None, None, _('Episode')),
                ('channel_prop', None, None, _('Podcast')),
                ('filesize_prop', 'length', gobject.TYPE_INT, _('Size')),
                ('pubdate_prop', 'pubDate', gobject.TYPE_INT, _('Released')),
                ('played_prop', None, None, _('Status')),
                ('age_prop', None, None, _('Downloaded')),
            )

        selection_buttons = {
                _('Select played'): lambda episode: episode.is_played,
                _('Select older than %d days') % self.config.episode_old_age: lambda episode: episode.age_in_days() > self.config.episode_old_age,
        }

        instructions = _('Select the episodes you want to delete:')

        episodes = []
        selected = []
        for channel in self.channels:
            for episode in channel.get_downloaded_episodes():
                if not episode.is_locked:
                    episodes.append(episode)
                    selected.append(episode.is_played)

        gPodderEpisodeSelector(self.gPodder, title = _('Remove old episodes'), instructions = instructions, \
                                episodes = episodes, selected = selected, columns = columns, \
                                stock_ok_button = gtk.STOCK_DELETE, callback = self.delete_episode_list, \
                                selection_buttons = selection_buttons, _config=self.config)

    def on_selected_episodes_status_changed(self):
        self.update_episode_list_icons(selected=True)
        self.update_podcast_list_model(selected=True)
        self.db.commit()

    def mark_selected_episodes_new(self):
        for episode in self.get_selected_episodes():
            episode.mark_new()
        self.on_selected_episodes_status_changed()

    def mark_selected_episodes_old(self):
        for episode in self.get_selected_episodes():
            episode.mark_old()
        self.on_selected_episodes_status_changed()

    def on_item_toggle_played_activate( self, widget, toggle = True, new_value = False):
        for episode in self.get_selected_episodes():
            if toggle:
                episode.mark(is_played=not episode.is_played)
            else:
                episode.mark(is_played=new_value)
        self.on_selected_episodes_status_changed()

    def on_item_toggle_lock_activate(self, widget, toggle=True, new_value=False):
        for episode in self.get_selected_episodes():
            if toggle:
                episode.mark(is_locked=not episode.is_locked)
            else:
                episode.mark(is_locked=new_value)
        self.on_selected_episodes_status_changed()

    def on_channel_toggle_lock_activate(self, widget, toggle=True, new_value=False):
        if self.active_channel is None:
            return

        self.active_channel.channel_is_locked = not self.active_channel.channel_is_locked
        self.active_channel.update_channel_lock()

        for episode in self.active_channel.get_all_episodes():
            episode.mark(is_locked=self.active_channel.channel_is_locked)

        self.update_podcast_list_model(selected=True)
        self.update_episode_list_icons(all=True)

    def send_subscriptions(self):
        try:
            subprocess.Popen(['xdg-email', '--subject', _('My podcast subscriptions'),
                                           '--attach', gpodder.subscription_file])
        except:
            return False

        return True

    def on_item_email_subscriptions_activate(self, widget):
        if not self.channels:
            self.show_message(_('Your subscription list is empty. Add some podcasts first.'), _('Could not send list'), widget=self.treeChannels)
        elif not self.send_subscriptions():
            self.show_message(_('There was an error sending your subscription list via e-mail.'), _('Could not send list'), important=True)

    def on_itemUpdateChannel_activate(self, widget=None):
        if self.active_channel is None:
            title = _('No podcast selected')
            message = _('Please select a podcast in the podcasts list to update.')
            self.show_message( message, title, widget=self.treeChannels)
            return

        self.update_feed_cache(channels=[self.active_channel])

    def on_itemUpdate_activate(self, widget=None):
        if self.channels:
            self.update_feed_cache()
        else:
            gPodderWelcome(self.gPodder, center_on_widget=self.gPodder, show_example_podcasts_callback=self.on_itemImportChannels_activate, setup_my_gpodder_callback=self.on_download_from_mygpo)

    def download_episode_list_paused(self, episodes):
        self.download_episode_list(episodes, True)

    def download_episode_list(self, episodes, add_paused=False):
        for episode in episodes:
            log('Downloading episode: %s', episode.title, sender = self)
            if not episode.was_downloaded(and_exists=True):
                task_exists = False
                for task in self.download_tasks_seen:
                    if episode.url == task.url and task.status not in (task.DOWNLOADING, task.QUEUED):
                        self.download_queue_manager.add_task(task)
                        self.enable_download_list_update()
                        task_exists = True
                        continue

                if task_exists:
                    continue

                try:
                    task = download.DownloadTask(episode, self.config)
                except Exception, e:
                    self.show_message(_('Download error while downloading %s:\n\n%s') % (episode.title, str(e)), _('Download error'), important=True)
                    log('Download error while downloading %s', episode.title, sender=self, traceback=True)
                    continue

                if add_paused:
                    task.status = task.PAUSED
                else:
                    self.download_queue_manager.add_task(task)

                self.download_status_model.register_task(task)
                self.enable_download_list_update()

    def cancel_task_list(self, tasks):
        if not tasks:
            return

        for task in tasks:
            if task.status in (task.QUEUED, task.DOWNLOADING):
                task.status = task.CANCELLED
            elif task.status == task.PAUSED:
                task.status = task.CANCELLED
                # Call run, so the partial file gets deleted
                task.run()

        self.update_episode_list_icons([task.url for task in tasks])
        self.play_or_download()

        # Update the tab title and downloads list
        self.update_downloads_list()

    def new_episodes_show(self, episodes, notification=False):
        if gpodder.ui.maemo:
            columns = (
                ('maemo_markup', None, None, _('Episode')),
            )
            show_notification = notification
        else:
            columns = (
                ('title_markup', None, None, _('Episode')),
                ('channel_prop', None, None, _('Podcast')),
                ('filesize_prop', 'length', gobject.TYPE_INT, _('Size')),
                ('pubdate_prop', 'pubDate', gobject.TYPE_INT, _('Released')),
            )
            show_notification = False

        instructions = _('Select the episodes you want to download:')

        gPodderEpisodeSelector(self.gPodder, title=_('New episodes available'), instructions=instructions, \
                               episodes=episodes, columns=columns, selected_default=True, \
                               stock_ok_button = 'gpodder-download', \
                               callback=self.download_episode_list, \
                               remove_callback=lambda e: e.mark_old(), \
                               remove_action=_('Mark as old'), \
                               remove_finished=self.episode_new_status_changed, \
                               _config=self.config, \
                               show_notification=show_notification)

    def on_itemDownloadAllNew_activate(self, widget, *args):
        if not self.offer_new_episodes():
            self.show_message(_('Please check for new episodes later.'), \
                    _('No new episodes available'), widget=self.btnUpdateFeeds)

    def get_new_episodes(self, channels=None):
        if channels is None:
            channels = self.channels
        episodes = []
        for channel in channels:
            for episode in channel.get_new_episodes(downloading=self.episode_is_downloading):
                episodes.append(episode)

        return episodes

    def on_sync_to_ipod_activate(self, widget, episodes=None):
        self.sync_ui.on_synchronize_episodes(self.channels, episodes)
        # The sync process might have updated the status of episodes,
        # therefore persist the database here to avoid losing data
        self.db.commit()

    def on_cleanup_ipod_activate(self, widget, *args):
        self.sync_ui.on_cleanup_device()

    def on_manage_device_playlist(self, widget):
        self.sync_ui.on_manage_device_playlist()

    def show_hide_tray_icon(self):
        if self.config.display_tray_icon and have_trayicon and self.tray_icon is None:
            self.tray_icon = GPodderStatusIcon(self, gpodder.icon_file, self.config)
        elif not self.config.display_tray_icon and self.tray_icon is not None:
            self.tray_icon.set_visible(False)
            del self.tray_icon
            self.tray_icon = None

        if self.config.minimize_to_tray and self.tray_icon:
            self.tray_icon.set_visible(self.is_iconified())
        elif self.tray_icon:
            self.tray_icon.set_visible(True)

    def on_itemShowToolbar_activate(self, widget):
        self.config.show_toolbar = self.itemShowToolbar.get_active()

    def on_itemShowDescription_activate(self, widget):
        self.config.episode_list_descriptions = self.itemShowDescription.get_active()

    def on_item_view_hide_boring_podcasts_toggled(self, toggleaction):
        self.config.podcast_list_hide_boring = toggleaction.get_active()
        if self.config.podcast_list_hide_boring:
            self.podcast_list_model.set_view_mode(self.config.episode_list_view_mode)
        else:
            self.podcast_list_model.set_view_mode(-1)

    def on_item_view_podcasts_changed(self, radioaction, current):
        # Only on Fremantle
        if current == self.item_view_podcasts_all:
            self.podcast_list_model.set_view_mode(-1)
        elif current == self.item_view_podcasts_downloaded:
            self.podcast_list_model.set_view_mode(EpisodeListModel.VIEW_DOWNLOADED)
        elif current == self.item_view_podcasts_unplayed:
            self.podcast_list_model.set_view_mode(EpisodeListModel.VIEW_UNPLAYED)

        self.config.podcast_list_view_mode = self.podcast_list_model.get_view_mode()

    def on_item_view_episodes_changed(self, radioaction, current):
        if current == self.item_view_episodes_all:
            self.episode_list_model.set_view_mode(EpisodeListModel.VIEW_ALL)
        elif current == self.item_view_episodes_undeleted:
            self.episode_list_model.set_view_mode(EpisodeListModel.VIEW_UNDELETED)
        elif current == self.item_view_episodes_downloaded:
            self.episode_list_model.set_view_mode(EpisodeListModel.VIEW_DOWNLOADED)
        elif current == self.item_view_episodes_unplayed:
            self.episode_list_model.set_view_mode(EpisodeListModel.VIEW_UNPLAYED)

        self.config.episode_list_view_mode = self.episode_list_model.get_view_mode()

        if self.config.podcast_list_hide_boring and not gpodder.ui.fremantle:
            self.podcast_list_model.set_view_mode(self.config.episode_list_view_mode)

    def update_item_device( self):
        if not gpodder.ui.fremantle:
            if self.config.device_type != 'none':
                self.itemDevice.set_visible(True)
                self.itemDevice.label = self.get_device_name()
            else:
                self.itemDevice.set_visible(False)

    def properties_closed( self):
        self.show_hide_tray_icon()
        self.update_item_device()
        if gpodder.ui.maemo:
            selection = self.treeAvailable.get_selection()
            if self.config.maemo_enable_gestures or \
                    self.config.enable_fingerscroll:
                selection.set_mode(gtk.SELECTION_SINGLE)
            else:
                selection.set_mode(gtk.SELECTION_MULTIPLE)

    def on_itemPreferences_activate(self, widget, *args):
        gPodderPreferences(self.gPodder, _config=self.config, \
                callback_finished=self.properties_closed, \
                user_apps_reader=self.user_apps_reader)

    def on_itemDependencies_activate(self, widget):
        gPodderDependencyManager(self.gPodder)

    def require_my_gpodder_authentication(self):
        if not self.config.my_gpodder_username or not self.config.my_gpodder_password:
            success, authentication = self.show_login_dialog(_('Login to my.gpodder.org'), _('Please enter your e-mail address and your password.'), username=self.config.my_gpodder_username, password=self.config.my_gpodder_password, username_prompt=_('E-Mail Address'), register_callback=lambda: util.open_website('http://my.gpodder.org/register'))
            if success and authentication[0] and authentication[1]:
                self.config.my_gpodder_username, self.config.my_gpodder_password = authentication
                return True
            else:
                return False

        return True
    
    def my_gpodder_offer_autoupload(self):
        if not self.config.my_gpodder_autoupload:
            if self.show_confirmation(_('gPodder can automatically upload your subscription list to my.gpodder.org when you close it. Do you want to enable this feature?'), _('Upload subscriptions on quit')):
                self.config.my_gpodder_autoupload = True
    
    def on_download_from_mygpo(self, widget):
        if self.require_my_gpodder_authentication():
            client = my.MygPodderClient(self.config.my_gpodder_username, self.config.my_gpodder_password)
            opml_data = client.download_subscriptions()
            if len(opml_data) > 0:
                fp = open(gpodder.subscription_file, 'w')
                fp.write(opml_data)
                fp.close()
                (added, skipped) = (0, 0)
                i = opml.Importer(gpodder.subscription_file)

                existing = [c.url for c in self.channels]
                urls = [item['url'] for item in i.items if item['url'] not in existing]

                skipped = len(i.items) - len(urls)
                added = len(urls)

                self.add_podcast_list(urls)

                self.my_gpodder_offer_autoupload()
                if added > 0:
                    self.show_message(_('Added %d new subscriptions and skipped %d existing ones.') % (added, skipped), _('Result of subscription download'), widget=self.treeChannels)
                elif widget is not None:
                    self.show_message(_('Your local subscription list is up to date.'), _('Result of subscription download'), widget=self.treeChannels)
            else:
                self.config.my_gpodder_password = ''
                self.on_download_from_mygpo(widget)
        else:
            self.show_message(_('Please set up your username and password first.'), _('Username and password needed'), important=True)

    def on_upload_to_mygpo(self, widget):
        if self.require_my_gpodder_authentication():
            client = my.MygPodderClient(self.config.my_gpodder_username, self.config.my_gpodder_password)
            self.save_channels_opml()
            success, messages = client.upload_subscriptions(gpodder.subscription_file)
            if widget is not None:
                if not success:
                    self.show_message('\n'.join(messages), _('Results of upload'), important=True)
                    self.config.my_gpodder_password = ''
                    self.on_upload_to_mygpo(widget)
                else:
                    self.my_gpodder_offer_autoupload()
                    self.show_message('\n'.join(messages), _('Results of upload'), widget=self.treeChannels)
            elif not success:
                log('Upload to my.gpodder.org failed, but widget is None!', sender=self)
        elif widget is not None:
            self.show_message(_('Please set up your username and password first.'), _('Username and password needed'), important=True)

    def on_itemAddChannel_activate(self, widget, *args):
        gPodderAddPodcast(self.gPodder, \
                add_urls_callback=self.add_podcast_list)

    def on_itemEditChannel_activate(self, widget, *args):
        if self.active_channel is None:
            title = _('No podcast selected')
            message = _('Please select a podcast in the podcasts list to edit.')
            self.show_message( message, title, widget=self.treeChannels)
            return

        callback_closed = lambda: self.update_podcast_list_model(selected=True)
        gPodderChannel(self.main_window, \
                channel=self.active_channel, \
                callback_closed=callback_closed, \
                cover_downloader=self.cover_downloader)

    def on_itemRemoveChannel_activate(self, widget, *args):
        if self.active_channel is None:
            title = _('No podcast selected')
            message = _('Please select a podcast in the podcasts list to remove.')
            self.show_message( message, title, widget=self.treeChannels)
            return

        try:
            if gpodder.ui.desktop:
                dialog = gtk.MessageDialog(self.gPodder, gtk.DIALOG_MODAL, gtk.MESSAGE_QUESTION, gtk.BUTTONS_NONE)
                dialog.add_button(gtk.STOCK_NO, gtk.RESPONSE_NO)
                dialog.add_button(gtk.STOCK_YES, gtk.RESPONSE_YES)

                title = _('Remove podcast and episodes?')
                message = _('Do you really want to remove <b>%s</b> and all downloaded episodes?') % saxutils.escape(self.active_channel.title)
             
                dialog.set_title(title)
                dialog.set_markup('<span weight="bold" size="larger">%s</span>\n\n%s'%(title, message))
            
                cb_ask = gtk.CheckButton(_('Do not delete my downloaded episodes'))
                dialog.vbox.pack_start(cb_ask)
                cb_ask.show_all()
                result = (dialog.run() == gtk.RESPONSE_YES)
                keep_episodes = cb_ask.get_active()
                dialog.destroy()
            elif gpodder.ui.diablo:
                result = self.show_confirmation(_('Do you really want to remove this podcast and all downloaded episodes?'))
                keep_episodes = False
            elif gpodder.ui.fremantle:
                result = True
                keep_episodes = False

            if result:
                # delete downloaded episodes only if checkbox is unchecked
                if keep_episodes:
                    log('Not removing downloaded episodes', sender=self)
                else:
                    self.active_channel.remove_downloaded()

                # Clean up downloads and download directories
                self.clean_up_downloads()

                # cancel any active downloads from this channel
                for episode in self.active_channel.get_all_episodes():
                    self.download_status_model.cancel_by_url(episode.url)

                # get the URL of the podcast we want to select next
                position = self.channels.index(self.active_channel)
                if position == len(self.channels)-1:
                    # this is the last podcast, so select the URL
                    # of the item before this one (i.e. the "new last")
                    select_url = self.channels[position-1].url
                else:
                    # there is a podcast after the deleted one, so
                    # we simply select the one that comes after it
                    select_url = self.channels[position+1].url
                
                title = self.active_channel.title

                # Remove the channel
                self.active_channel.delete(purge=not keep_episodes)
                self.channels.remove(self.active_channel)
                self.channel_list_changed = True
                self.save_channels_opml()

                if gpodder.ui.fremantle:
                    self.show_message(_('Podcast removed: %s') % title)

                # Re-load the channels and select the desired new channel
                self.update_feed_cache(force_update=False, select_url_afterwards=select_url)
        except:
            log('There has been an error removing the channel.', traceback=True, sender=self)
        self.update_podcasts_tab()

    def get_opml_filter(self):
        filter = gtk.FileFilter()
        filter.add_pattern('*.opml')
        filter.add_pattern('*.xml')
        filter.set_name(_('OPML files')+' (*.opml, *.xml)')
        return filter

    def on_item_import_from_file_activate(self, widget, filename=None):
        if filename is None:
            if gpodder.ui.desktop or gpodder.ui.fremantle:
                # FIXME: Hildonization on Fremantle
                dlg = gtk.FileChooserDialog(title=_('Import from OPML'), parent=None, action=gtk.FILE_CHOOSER_ACTION_OPEN)
                dlg.add_button(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
                dlg.add_button(gtk.STOCK_OPEN, gtk.RESPONSE_OK)
            elif gpodder.ui.diablo:
                dlg = hildon.FileChooserDialog(self.gPodder, gtk.FILE_CHOOSER_ACTION_OPEN)
            dlg.set_filter(self.get_opml_filter())
            response = dlg.run()
            filename = None
            if response == gtk.RESPONSE_OK:
                filename = dlg.get_filename()
            dlg.destroy()

        if filename is not None:
            dir = gPodderPodcastDirectory(self.gPodder, _config=self.config, \
                    custom_title=_('Import podcasts from OPML file'), \
                    add_urls_callback=self.add_podcast_list, \
                    hide_url_entry=True)
            dir.download_opml_file(filename)

    def on_itemExportChannels_activate(self, widget, *args):
        if not self.channels:
            title = _('Nothing to export')
            message = _('Your list of podcast subscriptions is empty. Please subscribe to some podcasts first before trying to export your subscription list.')
            self.show_message(message, title, widget=self.treeChannels)
            return

        if gpodder.ui.desktop or gpodder.ui.fremantle:
            # FIXME: Hildonization on Fremantle
            dlg = gtk.FileChooserDialog(title=_('Export to OPML'), parent=self.gPodder, action=gtk.FILE_CHOOSER_ACTION_SAVE)
            dlg.add_button(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
            dlg.add_button(gtk.STOCK_SAVE, gtk.RESPONSE_OK)
        elif gpodder.ui.diablo:
            dlg = hildon.FileChooserDialog(self.gPodder, gtk.FILE_CHOOSER_ACTION_SAVE)
        dlg.set_filter(self.get_opml_filter())
        response = dlg.run()
        if response == gtk.RESPONSE_OK:
            filename = dlg.get_filename()
            dlg.destroy()
            exporter = opml.Exporter( filename)
            if exporter.write(self.channels):
                if len(self.channels) == 1:
                    title = _('One subscription exported')
                else:
                    title = _('%d subscriptions exported') % len(self.channels)
                self.show_message(_('Your podcast list has been successfully exported.'), title, widget=self.treeChannels)
            else:
                self.show_message( _('Could not export OPML to file. Please check your permissions.'), _('OPML export failed'), important=True)
        else:
            dlg.destroy()

    def on_itemImportChannels_activate(self, widget, *args):
        dir = gPodderPodcastDirectory(self.gPodder, _config=self.config, \
                add_urls_callback=self.add_podcast_list)
        if not gpodder.ui.fremantle:
            util.idle_add(dir.download_opml_file, self.config.opml_url)

    def on_homepage_activate(self, widget, *args):
        util.open_website(gpodder.__url__)

    def on_wiki_activate(self, widget, *args):
        util.open_website('http://wiki.gpodder.org/')

    def on_bug_tracker_activate(self, widget, *args):
        if gpodder.ui.maemo:
            util.open_website('http://bugs.maemo.org/enter_bug.cgi?product=gPodder')
        else:
            util.open_website('http://bugs.gpodder.org/')

    def on_shop_activate(self, widget, *args):
        util.open_website('http://gpodder.org/shop')

    def on_wishlist_activate(self, widget, *args):
        util.open_website('http://www.amazon.de/gp/registry/2PD2MYGHE6857')

    def on_itemAbout_activate(self, widget, *args):
        dlg = gtk.AboutDialog()
        dlg.set_name('gPodder')
        dlg.set_version(gpodder.__version__)
        dlg.set_copyright(gpodder.__copyright__)
        dlg.set_website(gpodder.__url__)
        dlg.set_translator_credits( _('translator-credits'))
        dlg.connect( 'response', lambda dlg, response: dlg.destroy())

        if gpodder.ui.desktop:
            # For the "GUI" version, we add some more
            # items to the about dialog (credits and logo)
            app_authors = [
                    _('Maintainer:'),
                    'Thomas Perl <thpinfo.com>',
            ]

            if os.path.exists(gpodder.credits_file):
                credits = open(gpodder.credits_file).read().strip().split('\n')
                app_authors += ['', _('Patches, bug reports and donations by:')]
                app_authors += credits

            dlg.set_authors(app_authors)
            try:
                dlg.set_logo(gtk.gdk.pixbuf_new_from_file(gpodder.icon_file))
            except:
                dlg.set_logo_icon_name('gpodder')
        
        dlg.run()

    def on_wNotebook_switch_page(self, widget, *args):
        page_num = args[1]
        if gpodder.ui.maemo:
            self.tool_downloads.set_active(page_num == 1)
            page = self.wNotebook.get_nth_page(page_num)
            tab_label = self.wNotebook.get_tab_label(page).get_text()
            if page_num == 0 and self.active_channel is not None:
                self.set_title(self.active_channel.title)
            else:
                self.set_title(tab_label)
        if page_num == 0:
            self.play_or_download()
            self.menuChannels.set_sensitive(True)
            self.menuSubscriptions.set_sensitive(True)
            # The message area in the downloads tab should be hidden
            # when the user switches away from the downloads tab
            if self.message_area is not None:
                self.message_area.hide()
                self.message_area = None
        else:
            self.menuChannels.set_sensitive(False)
            self.menuSubscriptions.set_sensitive(False)
            if gpodder.ui.desktop:
                self.toolDownload.set_sensitive(False)
                self.toolPlay.set_sensitive(False)
                self.toolTransfer.set_sensitive(False)
                self.toolCancel.set_sensitive(False)

    def on_treeChannels_row_activated(self, widget, path, *args):
        # double-click action of the podcast list or enter
        self.treeChannels.set_cursor(path)

    def on_treeChannels_cursor_changed(self, widget, *args):
        ( model, iter ) = self.treeChannels.get_selection().get_selected()

        if model is not None and iter is not None:
            old_active_channel = self.active_channel
            self.active_channel = model.get_value(iter, PodcastListModel.C_CHANNEL)

            if self.active_channel == old_active_channel:
                return

            if gpodder.ui.maemo:
                self.set_title(self.active_channel.title)
            self.itemEditChannel.set_visible(True)
            self.itemRemoveChannel.set_visible(True)
        else:
            self.active_channel = None
            self.itemEditChannel.set_visible(False)
            self.itemRemoveChannel.set_visible(False)

        self.update_episode_list_model()

    def on_btnEditChannel_clicked(self, widget, *args):
        self.on_itemEditChannel_activate( widget, args)

    def get_selected_episodes(self):
        """Get a list of selected episodes from treeAvailable"""
        selection = self.treeAvailable.get_selection()
        model, paths = selection.get_selected_rows()

        episodes = [model.get_value(model.get_iter(path), EpisodeListModel.C_EPISODE) for path in paths]
        return episodes

    def on_transfer_selected_episodes(self, widget):
        self.on_sync_to_ipod_activate(widget, self.get_selected_episodes())

    def on_playback_selected_episodes(self, widget):
        self.playback_episodes(self.get_selected_episodes())

    def on_shownotes_selected_episodes(self, widget):
        episodes = self.get_selected_episodes()
        if episodes:
            episode = episodes.pop(0)
            self.show_episode_shownotes(episode)
        else:
            self.show_message(_('Please select an episode from the episode list to display shownotes.'), _('No episode selected'), widget=self.treeAvailable)

    def on_download_selected_episodes(self, widget):
        episodes = self.get_selected_episodes()
        self.download_episode_list(episodes)
        self.update_episode_list_icons([episode.url for episode in episodes])
        self.play_or_download()

    def on_treeAvailable_row_activated(self, widget, path, view_column):
        """Double-click/enter action handler for treeAvailable"""
        # We should only have one one selected as it was double clicked!
        e = self.get_selected_episodes()[0]
        
        if (self.config.double_click_episode_action == 'download'):
            # If the episode has already been downloaded and exists then play it
            if e.was_downloaded(and_exists=True):
                self.playback_episodes(self.get_selected_episodes())
            # else download it if it is not already downloading
            elif not self.episode_is_downloading(e): 
                self.download_episode_list([e])
                self.update_episode_list_icons([e.url])
                self.play_or_download()
        elif (self.config.double_click_episode_action == 'stream'):
            # If we happen to have downloaded this episode simple play it
            if e.was_downloaded(and_exists=True):
                self.playback_episodes(self.get_selected_episodes())
            # else if streaming is possible stream it    
            elif self.streaming_possible():
                self.playback_episodes(self.get_selected_episodes())
            else:
                log('Unable to stream episode - default media player selected!', sender=self, traceback=True)
                self.show_message(_('Please check your media player settings in the preferences dialog.'), _('Unable to stream episode'), widget=self.toolPreferences)
        else:
            # default action is to display show notes
            self.on_shownotes_selected_episodes(widget)

    def show_episode_shownotes(self, episode):
        if self.episode_shownotes_window is None:
            log('First-time use of episode window --- creating', sender=self)
            self.episode_shownotes_window = gPodderShownotes(self.gPodder, _config=self.config, \
                    _download_episode_list=self.download_episode_list, \
                    _playback_episodes=self.playback_episodes, \
                    _delete_episode_list=self.delete_episode_list, \
                    _episode_list_status_changed=self.episode_list_status_changed, \
                    _cancel_task_list=self.cancel_task_list, \
                    _episode_is_downloading=self.episode_is_downloading)
        self.episode_shownotes_window.show(episode)
        if self.episode_is_downloading(episode):
            self.update_downloads_list()

    def auto_update_procedure(self, first_run=False):
        log('auto_update_procedure() got called', sender=self)
        if not first_run and self.config.auto_update_feeds and self.is_iconified():
            self.update_feed_cache(force_update=True)

        next_update = 60*1000*self.config.auto_update_frequency
        gobject.timeout_add(next_update, self.auto_update_procedure)
        return False

    def on_treeDownloads_row_activated(self, widget, *args):
        # Use the standard way of working on the treeview
        selection = self.treeDownloads.get_selection()
        (model, paths) = selection.get_selected_rows()
        selected_tasks = [(gtk.TreeRowReference(model, path), model.get_value(model.get_iter(path), 0)) for path in paths]

        for tree_row_reference, task in selected_tasks:
            if task.status in (task.DOWNLOADING, task.QUEUED):
                task.status = task.PAUSED
            elif task.status in (task.CANCELLED, task.PAUSED, task.FAILED):
                self.download_queue_manager.add_task(task)
                self.enable_download_list_update()
            elif task.status == task.DONE:
                model.remove(model.get_iter(tree_row_reference.get_path()))
                
        self.play_or_download()

        # Update the tab title and downloads list
        self.update_downloads_list()

    def on_item_cancel_download_activate(self, widget):
        if self.wNotebook.get_current_page() == 0:
            selection = self.treeAvailable.get_selection()
            (model, paths) = selection.get_selected_rows()
            urls = [model.get_value(model.get_iter(path), \
                    self.episode_list_model.C_URL) for path in paths]
            selected_tasks = [task for task in self.download_tasks_seen \
                    if task.url in urls]
        else:
            selection = self.treeDownloads.get_selection()
            (model, paths) = selection.get_selected_rows()
            selected_tasks = [model.get_value(model.get_iter(path), \
                    self.download_status_model.C_TASK) for path in paths]
        self.cancel_task_list(selected_tasks)

    def on_btnCancelAll_clicked(self, widget, *args):
        self.cancel_task_list(self.download_tasks_seen)

    def on_btnDownloadedDelete_clicked(self, widget, *args):
        if self.wNotebook.get_current_page() == 1:
            # Downloads tab visibile - skip (for now)
            return

        episodes = self.get_selected_episodes()
        self.delete_episode_list(episodes)

    def on_key_press(self, widget, event):
        # Allow tab switching with Ctrl + PgUp/PgDown
        if event.state & gtk.gdk.CONTROL_MASK:
            if event.keyval == gtk.keysyms.Page_Up:
                self.wNotebook.prev_page()
                return True
            elif event.keyval == gtk.keysyms.Page_Down:
                self.wNotebook.next_page()
                return True

        # After this code we only handle Maemo hardware keys,
        # so if we are not a Maemo app, we don't do anything
        if not gpodder.ui.maemo:
            return False
        
        diff = 0
        if event.keyval == gtk.keysyms.F7: #plus
            diff = 1
        elif event.keyval == gtk.keysyms.F8: #minus
            diff = -1

        if diff != 0 and not self.currently_updating:
            selection = self.treeChannels.get_selection()
            (model, iter) = selection.get_selected()
            new_path = ((model.get_path(iter)[0]+diff)%len(model),)
            selection.select_path(new_path)
            self.treeChannels.set_cursor(new_path)
            return True

        return False

    def on_iconify(self):
        if self.tray_icon:
            self.gPodder.set_skip_taskbar_hint(True)
            if self.config.minimize_to_tray:
                self.tray_icon.set_visible(True)
        else:
            self.gPodder.set_skip_taskbar_hint(False)

    def on_uniconify(self):
        if self.tray_icon:
            self.gPodder.set_skip_taskbar_hint(False)
            if self.config.minimize_to_tray:
                self.tray_icon.set_visible(False)
        else:
            self.gPodder.set_skip_taskbar_hint(False)

    def uniconify_main_window(self):
        if self.is_iconified():
            self.gPodder.present()
 
    def iconify_main_window(self):
        if not self.is_iconified():
            self.gPodder.iconify()          

    def update_podcasts_tab(self):
        if len(self.channels):
            if gpodder.ui.fremantle:
                self.button_podcasts.set_value(_('%d subscriptions') % len(self.channels))
            else:
                self.label2.set_text(_('Podcasts (%d)') % len(self.channels))
        else:
            if gpodder.ui.fremantle:
                self.button_podcasts.set_value(_('No subscriptions'))
            else:
                self.label2.set_text(_('Podcasts'))

    @dbus.service.method(gpodder.dbus_interface)
    def show_gui_window(self):
        self.gPodder.present()

    @dbus.service.method(gpodder.dbus_interface)
    def subscribe_to_url(self, url):
        gPodderAddPodcast(self.gPodder,
                add_urls_callback=self.add_podcast_list,
                preset_url=url)

    @dbus.service.method(gpodder.dbus_interface)
    def mark_episode_played(self, filename):
        if filename is None:
            return False

        for channel in self.channels:
            for episode in channel.get_all_episodes():
                fn = episode.local_filename(create=False, check_only=True)
                if fn == filename:
                    episode.mark(is_played=True)
                    self.db.commit()
                    self.update_episode_list_icons([episode.url])
                    self.update_podcast_list_model([episode.channel.url])
                    return True

        return False


def main(options=None):
    gobject.threads_init()
    gobject.set_application_name('gPodder')

    if gpodder.ui.diablo:
        # Try to enable the custom icon theme for gPodder on Maemo
        settings = gtk.settings_get_default()
        settings.set_string_property('gtk-icon-theme-name', \
                                     'gpodder', __file__)

    gtk.window_set_default_icon_name('gpodder')
    gtk.about_dialog_set_url_hook(lambda dlg, link, data: util.open_website(link), None)

    try:
        session_bus = dbus.SessionBus(mainloop=dbus.glib.DBusGMainLoop())
        bus_name = dbus.service.BusName(gpodder.dbus_bus_name, bus=session_bus)
    except dbus.exceptions.DBusException, dbe:
        log('Warning: Cannot get "on the bus".', traceback=True)
        dlg = gtk.MessageDialog(None, gtk.DIALOG_MODAL, gtk.MESSAGE_ERROR, \
                gtk.BUTTONS_CLOSE, _('Cannot start gPodder'))
        dlg.format_secondary_markup(_('D-Bus error: %s') % (str(dbe),))
        dlg.set_title('gPodder')
        dlg.run()
        dlg.destroy()
        sys.exit(0)

    util.make_directory(gpodder.home)
    config = UIConfig(gpodder.config_file)

    if gpodder.ui.diablo:
        # Detect changing of SD cards between mmc1/mmc2 if a gpodder
        # folder exists there (allow moving "gpodder" between SD cards or USB)
        # Also allow moving "gpodder" to home folder (e.g. rootfs on SD)
        if not os.path.exists(config.download_dir):
            log('Downloads might have been moved. Trying to locate them...')
            for basedir in ['/media/mmc1', '/media/mmc2']+glob.glob('/media/usb/*')+['/home/user/MyDocs']:
                dir = os.path.join(basedir, 'gpodder')
                if os.path.exists(dir):
                    log('Downloads found in: %s', dir)
                    config.download_dir = dir
                    break
                else:
                    log('Downloads NOT FOUND in %s', dir)

        if config.enable_fingerscroll:
            BuilderWidget.use_fingerscroll = True
    elif gpodder.ui.fremantle:
        # FIXME: Move download_dir from ~/gPodder-Podcasts to default setting
        pass

    gp = gPodder(bus_name, config)

    # Handle options
    if options.subscribe:
        util.idle_add(gp.subscribe_to_url, options.subscribe)

    gp.run()