~mvo/update-manager/not-automatic

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# UpdateManager.py 
#  
#  Copyright (c) 2004-2008 Canonical
#                2004 Michiel Sikkes
#                2005 Martin Willemoes Hansen
#  
#  Author: Michiel Sikkes <michiel@eyesopened.nl>
#          Michael Vogt <mvo@debian.org>
#          Martin Willemoes Hansen <mwh@sysrq.dk>
# 
#  This program is free software; you can redistribute it and/or 
#  modify it under the terms of the GNU General Public License as 
#  published by the Free Software Foundation; either version 2 of the
#  License, or (at your option) any later version.
# 
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
# 
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
#  USA

import pygtk
pygtk.require('2.0')
import gtk
import gtk.gdk
import gtk.glade
try:
    import gconf
except:
    import fakegconf as gconf
import gobject

import warnings
warnings.filterwarnings("ignore", "apt API not stable yet", FutureWarning)
import apt
import apt_pkg

import gettext
import copy
import string
import sys
import os
import os.path
import stat
import re
import locale
import tempfile
import pango
import subprocess
import pwd
import urllib2
import httplib
import socket
import time
import thread
import xml.sax.saxutils

import dbus
import dbus.service
import dbus.glib

import GtkProgress

from gettext import gettext as _
from gettext import ngettext


from Core.utils import *
from Core.UpdateList import UpdateList
from Core.MyCache import MyCache, NotEnoughFreeSpaceError
from Core.MetaRelease import Dist

from DistUpgradeFetcher import DistUpgradeFetcherGtk
from ChangelogViewer import ChangelogViewer
from SimpleGladeApp import SimpleGladeApp
from HelpViewer import HelpViewer
from MetaReleaseGObject import MetaRelease

#import pdb

# FIXME:
# - kill "all_changes" and move the changes into the "Update" class

# list constants
(LIST_CONTENTS, LIST_NAME, LIST_PKG, LIST_ORIGIN) = range(4)

# actions for "invoke_manager"
(INSTALL, UPDATE) = range(2)


class UpdateManagerDbusControler(dbus.service.Object):
    """ this is a helper to provide the UpdateManagerIFace """
    def __init__(self, parent, bus_name,
                 object_path='/org/freedesktop/UpdateManagerObject'):
        dbus.service.Object.__init__(self, bus_name, object_path)
        self.parent = parent

    @dbus.service.method('org.freedesktop.UpdateManagerIFace')
    def bringToFront(self):
        self.parent.window_main.present()
        return True

class UpdateManager(SimpleGladeApp):

  def __init__(self, datadir, options):
    self.setupDbus()
    gtk.window_set_default_icon_name("update-manager")

    self.datadir = datadir
    SimpleGladeApp.__init__(self, datadir+"glade/UpdateManager.glade",
                            None, domain="update-manager")

    self.image_logo.set_from_icon_name("update-manager", gtk.ICON_SIZE_DIALOG)
    self.window_main.set_sensitive(False)
    self.window_main.grab_focus()
    self.button_close.grab_focus()
    self.dl_size = 0

    # create text view
    self.textview_changes = ChangelogViewer()
    self.textview_changes.show()
    self.scrolledwindow_changes.add(self.textview_changes)
    changes_buffer = self.textview_changes.get_buffer()
    changes_buffer.create_tag("versiontag", weight=pango.WEIGHT_BOLD)

    # expander
    self.expander_details.connect("notify::expanded", self.activate_details)

    # useful exit stuff
    self.window_main.connect("delete_event", self.close)
    self.button_close.connect("clicked", lambda w: self.exit())

    # the treeview (move into it's own code!)
    self.store = gtk.ListStore(str, str, gobject.TYPE_PYOBJECT, 
                               gobject.TYPE_PYOBJECT)
    self.treeview_update.set_model(self.store)
    self.treeview_update.set_headers_clickable(True);

    tr = gtk.CellRendererText()
    tr.set_property("xpad", 6)
    tr.set_property("ypad", 6)
    cr = gtk.CellRendererToggle()
    cr.set_property("activatable", True)
    cr.set_property("xpad", 6)
    cr.connect("toggled", self.toggled)

    column_install = gtk.TreeViewColumn("Install", cr)
    column_install.set_cell_data_func (cr, self.install_column_view_func)
    column = gtk.TreeViewColumn("Name", tr, markup=LIST_CONTENTS)
    column.set_resizable(True)
    major,minor,patch = gtk.pygtk_version
    if (major >= 2) and (minor >= 5):
      column_install.set_sizing(gtk.TREE_VIEW_COLUMN_FIXED)
      column_install.set_fixed_width(30)
      column.set_sizing(gtk.TREE_VIEW_COLUMN_FIXED)
      column.set_fixed_width(100)
      self.treeview_update.set_fixed_height_mode(True)

    self.treeview_update.append_column(column_install)
    column_install.set_visible(True)
    self.treeview_update.append_column(column)
    self.treeview_update.set_search_column(LIST_NAME)
    self.treeview_update.connect("button-press-event", self.show_context_menu)
    self.treeview_update.connect("row-activated", self.row_activated)

    # setup the help viewer and disable the help button if there
    # is no viewer available
    self.help_viewer = HelpViewer("update-manager")
    if self.help_viewer.check() == False:
        self.button_help.set_sensitive(False)

    self.gconfclient = gconf.client_get_default()
    init_proxy(self.gconfclient)
    try:
        self.show_versions = self.gconfclient.get_bool("/apps/update-manager/show_versions")
    except gobject.GError, e:
        self.show_versions = False
    # get progress object
    self.progress = GtkProgress.GtkOpProgress(self.dialog_cacheprogress,
                                              self.progressbar_cache,
                                              self.label_cache,
                                              self.window_main)
    # restore state
    self.restore_state()
    if options.no_focus_on_map:
        self.window_main.set_focus_on_map(False)
        self.progress._window.set_focus_on_map(False)
    self.window_main.show()

  def install_column_view_func(self, cell_layout, renderer, model, iter):
    pkg = model.get_value(iter, LIST_PKG)
    # hide it if we are only a header line
    renderer.set_property("visible", pkg != None)
    if pkg is None:
        return
    to_install = pkg.markedInstall or pkg.markedUpgrade
    renderer.set_property("active", to_install)
    if pkg.name in self.list.held_back:
        renderer.set_property("activatable", False)
    else: 
        renderer.set_property("activatable", True)

  def setupDbus(self):
    """ this sets up a dbus listener if none is installed alread """
    # check if there is another g-a-i already and if not setup one
    # listening on dbus
    try:
        bus = dbus.SessionBus()
    except:
        print "warning: could not initiate dbus"
        return
    try:
        proxy_obj = bus.get_object('org.freedesktop.UpdateManager', 
                                   '/org/freedesktop/UpdateManagerObject')
        iface = dbus.Interface(proxy_obj, 'org.freedesktop.UpdateManagerIFace')
        iface.bringToFront()
        #print "send bringToFront"
        sys.exit(0)
    except dbus.DBusException, e:
         #print "no listening object (%s) "% e
         bus_name = dbus.service.BusName('org.freedesktop.UpdateManager',bus)
         self.dbusControler = UpdateManagerDbusControler(self, bus_name)


  def on_checkbutton_reminder_toggled(self, checkbutton):
    self.gconfclient.set_bool("/apps/update-manager/remind_reload",
                              not checkbutton.get_active())

  def close(self, widget, data=None):
    if self.window_main.get_property("sensitive") is False:
        return True
    else:
        self.exit()

  
  def set_changes_buffer(self, changes_buffer, text, name, srcpkg):
    changes_buffer.set_text("")
    lines = text.split("\n")
    if len(lines) == 1:
      changes_buffer.set_text(text)
      return
    
    for line in lines:
      end_iter = changes_buffer.get_end_iter()
      version_match = re.match(r'^%s \((.*)\)(.*)\;.*$' % re.escape(srcpkg), line)
      #bullet_match = re.match("^.*[\*-]", line)
      author_match = re.match("^.*--.*<.*@.*>.*$", line)
      if version_match:
        version = version_match.group(1)
	upload_archive = version_match.group(2).strip()
        version_text = _("Version %s: \n") % version
        changes_buffer.insert_with_tags_by_name(end_iter, version_text, "versiontag")
      elif (author_match):
        pass
      else:
        changes_buffer.insert(end_iter, line+"\n")
        

  def on_treeview_update_cursor_changed(self, widget):
    tuple = widget.get_cursor()
    path = tuple[0]
    # check if we have a path at all
    if path == None:
      return
    model = widget.get_model()
    iter = model.get_iter(path)

    # set descr
    pkg = model.get_value(iter, LIST_PKG)
    if pkg == None or pkg.description == None:
      changes_buffer = self.textview_changes.get_buffer()
      changes_buffer.set_text("")
      desc_buffer = self.textview_descr.get_buffer()
      desc_buffer.set_text("")
      self.notebook_details.set_sensitive(False)
      return
    long_desc = pkg.description
    self.notebook_details.set_sensitive(True)
    # Skip the first line - it's a duplicate of the summary
    i = long_desc.find("\n")
    long_desc = long_desc[i+1:]
    # do some regular expression magic on the description
    # Add a newline before each bullet
    p = re.compile(r'^(\s|\t)*(\*|0|-)',re.MULTILINE)
    long_desc = p.sub('\n*', long_desc)
    # replace all newlines by spaces
    p = re.compile(r'\n', re.MULTILINE)
    long_desc = p.sub(" ", long_desc)
    # replace all multiple spaces by newlines
    p = re.compile(r'\s\s+', re.MULTILINE)
    long_desc = p.sub("\n", long_desc)

    desc_buffer = self.textview_descr.get_buffer()
    desc_buffer.set_text(long_desc)

    # now do the changelog
    name = model.get_value(iter, LIST_NAME)
    if name == None:
      return

    changes_buffer = self.textview_changes.get_buffer()
    
    # check if we have the changes already
    if self.cache.all_changes.has_key(name):
      changes = self.cache.all_changes[name]
      self.set_changes_buffer(changes_buffer, changes[0], name, changes[1])
    else:
      if self.expander_details.get_expanded():
        lock = thread.allocate_lock()
        lock.acquire()
        t=thread.start_new_thread(self.cache.get_news_and_changelog,(name,lock))
        changes_buffer.set_text("%s\n" % _("Downloading list of changes..."))
        iter = changes_buffer.get_iter_at_line(1)
        anchor = changes_buffer.create_child_anchor(iter)
        button = gtk.Button(stock="gtk-cancel")
        self.textview_changes.add_child_at_anchor(button, anchor)
        button.show()
        id = button.connect("clicked",
                            lambda w,lock: lock.release(), lock)
        # wait for the dl-thread
        while lock.locked():
          time.sleep(0.01)
          while gtk.events_pending():
            gtk.main_iteration()
        # download finished (or canceld, or time-out)
        button.hide()
        button.disconnect(id);
    # display NEWS.Debian first, then the changelog
    changes = ""
    srcpkg = self.cache[name].sourcePackageName
    if self.cache.all_news.has_key(name):
        changes += self.cache.all_news[name]
    if self.cache.all_changes.has_key(name):
        changes += self.cache.all_changes[name]
    if changes:
        self.set_changes_buffer(changes_buffer, changes, name, srcpkg)

  def show_context_menu(self, widget, event):
    """
    Show a context menu if a right click was performed on an update entry
    """
    if event.type == gtk.gdk.BUTTON_PRESS and event.button == 3:
        menu = gtk.Menu()
        item_select_none = gtk.MenuItem(_("_Uncheck All"))
        item_select_none.connect("activate", self.select_none_updgrades)
        menu.add(item_select_none)
        num_updates = self.cache.installCount
        if num_updates == 0:
            item_select_none.set_property("sensitive", False)
        item_select_all = gtk.MenuItem(_("_Check All"))
        item_select_all.connect("activate", self.select_all_updgrades)
        menu.add(item_select_all)
        menu.popup(None, None, None, 0, event.time)
        menu.show_all()
        return True

  def select_all_updgrades(self, widget):
    """
    Select all updates
    """
    self.setBusy(True)
    self.cache.saveDistUpgrade()
    self.treeview_update.queue_draw()
    self.refresh_updates_count()
    self.setBusy(False)

  def select_none_updgrades(self, widget):
    """
    Select none updates
    """
    self.setBusy(True)
    self.cache.clear()
    self.treeview_update.queue_draw()
    self.refresh_updates_count()
    self.setBusy(False)

  def setBusy(self, flag):
      """ Show a watch cursor if the app is busy for more than 0.3 sec.
      Furthermore provide a loop to handle user interface events """
      if self.window_main.window is None:
          return
      if flag == True:
          self.window_main.window.set_cursor(gtk.gdk.Cursor(gtk.gdk.WATCH))
      else:
          self.window_main.window.set_cursor(None)
      while gtk.events_pending():
          gtk.main_iteration()

  def refresh_updates_count(self):
      self.button_install.set_sensitive(self.cache.installCount)
      try:
          self.dl_size = self.cache.requiredDownload
          # TRANSLATORS: b stands for Bytes
          self.label_downsize.set_markup(_("Download size: %s") % \
                                         humanize_size(self.dl_size))
      except SystemError, e:
          print "requiredDownload could not be calculated: %s" % e
          self.label_downsize.set_markup(_("Unknown download size"))

  def _get_last_apt_get_update_text(self):
      """
      return a human readable string with the information when
      the last apt-get update was run
      """
      if not os.path.exists("/var/lib/apt/periodic/update-success-stamp"):
          return _("It is unknown when the package information was "
                   "updated last. Please try clicking on the 'Check' "
                   "button to update the information.")
      # calculate when the last apt-get update (or similar operation)
      # was performed
      mtime = os.stat("/var/lib/apt/periodic/update-success-stamp")[stat.ST_MTIME]
      ago_days = int( (time.time() - mtime) / (24*60*60))
      ago_hours = int((time.time() - mtime) / (60*60) )
      if ago_days > 0:
          return ngettext("The package information was last updated %s day ago.",
                          "The package information was last updated %s days ago.",
                          ago_days) % ago_days
      elif ago_hours > 0:
          return ngettext("The package information was last updated %s hour ago.",
                          "The package information was last updated %s hours ago.",
                          ago_hours) % ago_hours
      else:
          return _("The package information was last updated less than one hour ago.")
      return None

  def update_count(self):
      """activate or disable widgets and show dialog texts correspoding to
         the number of available updates"""
      self.refresh_updates_count()
      num_updates = self.cache.installCount
      text_label_main = _("Software updates correct errors, eliminate security vulnerabilities and provide new features.")
      if num_updates == 0:
          text_header= "<big><b>%s</b></big>"  % _("Your system is up-to-date")
          text_download = ""
          self.notebook_details.set_sensitive(False)
          self.treeview_update.set_sensitive(False)
          self.button_install.set_sensitive(False)
          self.label_downsize.set_text=""
          self.button_close.grab_default()
          self.textview_changes.get_buffer().set_text("")
          self.textview_descr.get_buffer().set_text("")
          if self._get_last_apt_get_update_text() is not None:
              text_label_main = self._get_last_apt_get_update_text()
      else:
          # show different text on first run (UX team suggestion)
          firstrun = self.gconfclient.get_bool("/apps/update-manager/first_run")
          if firstrun:
              text_header = "<big><b>%s</b></big>" % _("Welcome to Ubuntu")
              text_label_main = _("These software updates have been issued since Ubuntu was released. If you don't want to install them now, choose \"Update Manager\" from the Administration Menu later.")
              self.gconfclient.set_bool("/apps/update-manager/first_run", False)
          else:
              text_header = "<big><b>%s</b></big>" % _("Software updates are available for this computer")
              text_label_main = _("If you don't want to install them now, choose \"Update Manager\" from the Administration menu later.")
          text_download = _("Download size: %s") % humanize_size(self.dl_size)
          self.notebook_details.set_sensitive(True)
          self.treeview_update.set_sensitive(True)
          self.button_install.grab_default()
          self.treeview_update.set_cursor(1)
      self.label_header.set_markup(text_header)
      self.label_downsize.set_markup(text_download)
      self.label_main_details.set_text(text_label_main)

  def activate_details(self, expander, data):
    expanded = self.expander_details.get_expanded()
    self.vbox_updates.set_child_packing(self.expander_details,
                                        expanded,
                                        True,
                                        0,
                                        True)
    self.gconfclient.set_bool("/apps/update-manager/show_details",expanded)
    if expanded:
      self.on_treeview_update_cursor_changed(self.treeview_update)

  def run_synaptic(self, id, action, lock):
    try:
      apt_pkg.PkgSystemUnLock()
    except SystemError:
      pass
    cmd = ["/usr/bin/gksu", 
           "--desktop", "/usr/share/applications/update-manager.desktop", 
           "--", "/usr/sbin/synaptic", "--hide-main-window",  
           "--non-interactive", "--parent-window-id", "%s" % (id) ]
    if action == INSTALL:
      # close when update was successful (its ok to use a Synaptic::
      # option here, it will not get auto-saved, because synaptic does
      # not save options in non-interactive mode)
      if self.gconfclient.get_bool("/apps/update-manager/autoclose_install_window"):
          cmd.append("-o")
          cmd.append("Synaptic::closeZvt=true")
      # custom progress strings
      cmd.append("--progress-str")
      cmd.append("%s" % _("Please wait, this can take some time."))
      cmd.append("--finish-str")
      cmd.append("%s" %  _("Update is complete"))
      f = tempfile.NamedTemporaryFile()
      for pkg in self.cache:
          if pkg.markedInstall or pkg.markedUpgrade:
              f.write("%s\tinstall\n" % pkg.name)
      cmd.append("--set-selections-file")
      cmd.append("%s" % f.name)
      f.flush()
      subprocess.call(cmd)
      f.close()
    elif action == UPDATE:
      cmd.append("--update-at-startup")
      subprocess.call(cmd)
    else:
      print "run_synaptic() called with unknown action"
      sys.exit(1)
    lock.release()

  def on_button_reload_clicked(self, widget):
    #print "on_button_reload_clicked"
    self.check_metarelease()
    self.invoke_manager(UPDATE)

  def on_button_help_clicked(self, widget):
    self.help_viewer.run()

  def on_button_install_clicked(self, widget):
    #print "on_button_install_clicked"
    err_sum = _("Not enough free disk space")
    err_long= _("The upgrade needs a total of %s free space on disk '%s'. "
                "Please free at least an additional %s of disk "
                "space on '%s'. "
                "Empty your trash and remove temporary "
                "packages of former installations using "
                "'sudo apt-get clean'.")
    # check free space and error if its not enough
    try:
        self.cache.checkFreeSpace()
    except NotEnoughFreeSpaceError, e:
        self.error(err_sum, err_long % (e.size_total,
                                        e.dir,
                                        e.size_needed,
                                        e.dir))
        return
    self.invoke_manager(INSTALL)
    
  def invoke_manager(self, action):
    # check first if no other package manager is runing

    # don't display apt-listchanges, we already showed the changelog
    os.environ["APT_LISTCHANGES_FRONTEND"]="none"

    # Do not suspend during the update process
    (dev, cookie) = inhibit_sleep()

    # set window to insensitive
    self.window_main.set_sensitive(False)
    self.window_main.window.set_cursor(gtk.gdk.Cursor(gtk.gdk.WATCH))
    lock = thread.allocate_lock()
    lock.acquire()
    t = thread.start_new_thread(self.run_synaptic,
                                (self.window_main.window.xid,action,lock))
    while lock.locked():
      while gtk.events_pending():
        gtk.main_iteration()
      time.sleep(0.05)
    while gtk.events_pending():
      gtk.main_iteration()
    s = _("Reading package information")
    self.label_cache_progress_title.set_label("<b><big>%s</big></b>" % s)
    self.fillstore()

    # Allow suspend after synaptic is finished
    if cookie != False:
        allow_sleep(dev, cookie)
    self.window_main.set_sensitive(True)
    self.window_main.window.set_cursor(None)

  def row_activated(self, treeview, path, column):
      print self.list.held_back
      iter = self.store.get_iter(path)
      pkg = self.store.get_value(iter, LIST_PKG)
      origin = self.store.get_value(iter, LIST_ORIGIN)
      if pkg is not None:
          return
      self.setBusy(True)
      actiongroup = apt_pkg.GetPkgActionGroup(self.cache._depcache)
      for pkg in self.list.pkgs[origin]:
          if pkg.markedInstall or pkg.markedUpgrade:
              #print "marking keep: ", pkg.name
              pkg.markKeep()
          elif not (pkg.name in self.list.held_back):
              #print "marking install: ", pkg.name
              pkg.markInstall(autoFix=False,autoInst=False)
      # check if we left breakage
      if self.cache._depcache.BrokenCount:
          Fix = apt_pkg.GetPkgProblemResolver(self.cache._depcache)
          Fix.ResolveByKeep()
      self.refresh_updates_count()
      self.treeview_update.queue_draw()
      del actiongroup
      self.setBusy(False)


  def toggled(self, renderer, path):
    """ a toggle button in the listview was toggled """
    iter = self.store.get_iter(path)
    pkg = self.store.get_value(iter, LIST_PKG)
    # make sure that we don't allow to toggle deactivated updates
    # this is needed for the call by the row activation callback
    if pkg is None or pkg.name in self.list.held_back:
        return False
    self.setBusy(True)
    # update the cache
    if pkg.markedInstall or pkg.markedUpgrade:
        pkg.markKeep()
        if self.cache._depcache.BrokenCount:
            Fix = apt_pkg.GetPkgProblemResolver(self.cache._depcache)
            Fix.ResolveByKeep()
    else:
        pkg.markInstall()
    self.treeview_update.queue_draw()
    self.refresh_updates_count()
    self.setBusy(False)

  def on_treeview_update_row_activated(self, treeview, path, column, *args):
      """
      If an update row was activated (by pressing space), toggle the 
      install check box
      """
      self.toggled(None, path)

  def exit(self):
    """ exit the application, save the state """
    self.save_state()
    #gtk.main_quit()
    sys.exit(0)

  def save_state(self):
    """ save the state  (window-size for now) """
    (x,y) = self.window_main.get_size()
    try:
        self.gconfclient.set_pair("/apps/update-manager/window_size",
                                  gconf.VALUE_INT, gconf.VALUE_INT, x, y)
    except gobject.GError, e:
        print "Could not save the configuration to gconf: %s" % e
        pass

  def restore_state(self):
    """ restore the state (window-size for now) """
    expanded = self.gconfclient.get_bool("/apps/update-manager/show_details")
    self.expander_details.set_expanded(expanded)
    self.vbox_updates.set_child_packing(self.expander_details,
                                        expanded,
                                        True,
                                        0,
                                        True)
    (x,y) = self.gconfclient.get_pair("/apps/update-manager/window_size",
                                      gconf.VALUE_INT, gconf.VALUE_INT)
    if x > 0 and y > 0:
      self.window_main.resize(x,y)

  def fillstore(self):
    # use the watch cursor
    self.setBusy(True)
    # clean most objects
    self.dl_size = 0
    try:
        self.initCache()
    except SystemError, e:
        msg = ("<big><b>%s</b></big>\n\n%s\n'%s'" %
               (_("Could not initialize the package information"),
                _("An unresolvable problem occurred while "
                  "initializing the package information.\n\n"
                  "Please report this bug against the 'update-manager' "
                  "package and include the following error message:\n"),
                e)
               )
        dialog = gtk.MessageDialog(self.window_main,
                                   0, gtk.MESSAGE_ERROR,
                                   gtk.BUTTONS_CLOSE,"")
        dialog.set_markup(msg)
        dialog.vbox.set_spacing(6)
        dialog.run()
        dialog.destroy()
        sys.exit(1)
    self.store.clear()
    self.list = UpdateList(self)
    # fill them again
    try:
        self.list.update(self.cache)
    except SystemError, e:
        msg = ("<big><b>%s</b></big>\n\n%s\n'%s'" %
               (_("Could not calculate the upgrade"),
                _("An unresolvable problem occurred while "
                  "calculating the upgrade.\n\n"
                  "Please report this bug against the 'update-manager' "
                  "package and include the following error message:"),
                e)
               )
        dialog = gtk.MessageDialog(self.window_main,
                                   0, gtk.MESSAGE_ERROR,
                                   gtk.BUTTONS_CLOSE,"")
        dialog.set_markup(msg)
        dialog.vbox.set_spacing(6)
        dialog.run()
        dialog.destroy()
    if self.list.num_updates > 0:
      origin_list = self.list.pkgs.keys()
      origin_list.sort(lambda x,y: cmp(x.importance,y.importance))
      origin_list.reverse()
      for origin in origin_list:
        self.store.append(['<b><big>%s</big></b>' % origin.description,
                           origin.description, None, origin])
        for pkg in self.list.pkgs[origin]:
          name = xml.sax.saxutils.escape(pkg.name)
          summary = xml.sax.saxutils.escape(pkg.summary)
          contents = "<b>%s</b>\n<small>%s</small>" % (name, summary)
          #TRANSLATORS: the b stands for Bytes
          size = _("(Size: %s)") % humanize_size(pkg.packageSize)
          if pkg.installedVersion != None:
              version = _("From version %(old_version)s to %(new_version)s") %\
                  {"old_version" : pkg.installedVersion,
                   "new_version" : pkg.candidateVersion}
          else:
              version = _("Version %s") % pkg.candidateVersion
          if self.show_versions:
              contents = "%s\n<small>%s %s</small>" % (contents, version, size)
          else:
              contents = "%s <small>%s</small>" % (contents, size)
          self.store.append([contents, pkg.name, pkg, None])
    self.update_count()
    self.setBusy(False)
    self.check_all_updates_installable()
    return False

  def dist_no_longer_supported(self, meta_release):
    msg = "<big><b>%s</b></big>\n\n%s" % \
          (_("Your distribution is not supported anymore"),
	   _("You will not get any further security fixes or critical "
             "updates. "
             "Upgrade to a later version of Ubuntu Linux. See "
             "http://www.ubuntu.com for more information on "
             "upgrading."))
    dialog = gtk.MessageDialog(self.window_main, 0, gtk.MESSAGE_WARNING,
                               gtk.BUTTONS_CLOSE,"")
    dialog.set_title("")
    dialog.set_markup(msg)
    dialog.run()
    dialog.destroy()

  def error(self, summary, details):
      " helper function to display a error message "
      msg = ("<big><b>%s</b></big>\n\n%s\n" % (summary, details) )
      dialog = gtk.MessageDialog(self.window_main,
                                 0, gtk.MESSAGE_ERROR,
                                 gtk.BUTTONS_CLOSE,"")
      dialog.set_markup(msg)
      dialog.vbox.set_spacing(6)
      dialog.run()
      dialog.destroy()

  def on_button_dist_upgrade_clicked(self, button):
      #print "on_button_dist_upgrade_clicked"
      fetcher = DistUpgradeFetcherGtk(new_dist=self.new_dist, parent=self, progress=self.progress)
      fetcher.run()
      
  def new_dist_available(self, meta_release, upgradable_to):
    self.frame_new_release.show()
    self.label_new_release.set_markup(_("<b>New distribution release '%s' is available</b>") % upgradable_to.version)
    self.new_dist = upgradable_to
    

  # fixme: we should probably abstract away all the stuff from libapt
  def initCache(self): 
    # get the lock
    try:
        apt_pkg.PkgSystemLock()
    except SystemError, e:
        pass
        #d = gtk.MessageDialog(parent=self.window_main,
        #                      flags=gtk.DIALOG_MODAL,
        #                      type=gtk.MESSAGE_ERROR,
        #                      buttons=gtk.BUTTONS_CLOSE)
        #d.set_markup("<big><b>%s</b></big>\n\n%s" % (
        #    _("Only one software management tool is allowed to "
        #      "run at the same time"),
        #    _("Please close the other application e.g. 'aptitude' "
        #      "or 'Synaptic' first.")))
        #print "error from apt: '%s'" % e
        #d.set_title("")
        #res = d.run()
        #d.destroy()
        #sys.exit()

    try:
        if hasattr(self, "cache"):
            self.cache.open(self.progress)
            self.cache._initDepCache()
        else:
            self.cache = MyCache(self.progress)
    except AssertionError:
        # if the cache could not be opened for some reason,
        # let the release upgrader handle it, it deals
        # a lot better with this
        self.ask_run_partial_upgrade()
        # we assert a clean cache
        msg=("<big><b>%s</b></big>\n\n%s"% \
             (_("Software index is broken"),
              _("It is impossible to install or remove any software. "
                "Please use the package manager \"Synaptic\" or run "
		"\"sudo apt-get install -f\" in a terminal to fix "
		"this issue at first.")))
        dialog = gtk.MessageDialog(self.window_main,
                                   0, gtk.MESSAGE_ERROR,
                                   gtk.BUTTONS_CLOSE,"")
        dialog.set_markup(msg)
        dialog.vbox.set_spacing(6)
        dialog.run()
        dialog.destroy()
        sys.exit(1)
    else:
        self.progress.hide()

  def check_auto_update(self):
      # Check if automatic update is enabled. If not show a dialog to inform
      # the user about the need of manual "reloads"
      remind = self.gconfclient.get_bool("/apps/update-manager/remind_reload")
      if remind == False:
          return

      update_days = apt_pkg.Config.FindI("APT::Periodic::Update-Package-Lists")
      if update_days < 1:
          self.dialog_manual_update.set_transient_for(self.window_main)
          res = self.dialog_manual_update.run()
          self.dialog_manual_update.hide()
          if res == gtk.RESPONSE_YES:
              self.on_button_reload_clicked(None)

  def check_all_updates_installable(self):
    """ Check if all available updates can be installed and suggest
        to run a distribution upgrade if not """
    if self.list.distUpgradeWouldDelete > 0:
        self.ask_run_partial_upgrade()

  def ask_run_partial_upgrade(self):
      self.dialog_dist_upgrade.set_transient_for(self.window_main)
      res = self.dialog_dist_upgrade.run()
      self.dialog_dist_upgrade.hide()
      if res == gtk.RESPONSE_YES:
          os.execl("/usr/bin/gksu",
                   "/usr/bin/gksu", "--desktop",
                   "/usr/share/applications/update-manager.desktop",
                   "--", "/usr/bin/update-manager", "--dist-upgrade")
      return False

  def check_metarelease(self):
      " check for new meta-release information "
      gconfclient = gconf.client_get_default()
      self.meta = MetaRelease(self.options.devel_release,
                              self.options.use_proposed)
      self.meta.connect("dist_no_longer_supported",self.dist_no_longer_supported)
      # check if we are interessted in dist-upgrade information
      # (we are not by default on dapper)
      if self.options.check_dist_upgrades or \
             gconfclient.get_bool("/apps/update-manager/check_dist_upgrades"):
          self.meta.connect("new_dist_available",self.new_dist_available)
      

  def main(self, options):
    self.options = options

    # check for new distributin information
    self.check_metarelease()

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

    self.fillstore()
    self.check_auto_update()
    gtk.main()