webactivity.py

# Copyright (C) 2006, Red Hat, Inc.
# Copyright (C) 2009 Martin Langhoff, Simon Schampijer, Daniel Drake
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

import os
import logging
from gettext import gettext as _

import gobject
gobject.threads_init()

import gtk
import sha
import base64
import time
import shutil
import sqlite3
import cjson
import gconf
import zipfile
import tempfile

# HACK: Needed by http://dev.sugarlabs.org/ticket/456
import gnome
gnome.init('Hulahop', '1.0')

from sugar.activity import activity
from sugar.graphics import style
import telepathy
import telepathy.client
from sugar.presence import presenceservice
from sugar.graphics.tray import HTray
from sugar import profile
from sugar.graphics.alert import Alert, ConfirmationAlert
from sugar.graphics.icon import Icon
from sugar import mime

import ssb
# get the profile saved in the ssb bundle, if needed
ssb.copy_profile()

PROFILE_VERSION = 1

_profile_version = 0
_profile_path = os.path.join(activity.get_activity_root(), 'data/gecko')
_version_file = os.path.join(_profile_path, 'version')

if os.path.exists(_version_file):
    f = open(_version_file)
    _profile_version = int(f.read())
    f.close()

if _profile_version < PROFILE_VERSION:
    if not os.path.exists(_profile_path):
        os.mkdir(_profile_path)

    shutil.copy('cert8.db', _profile_path)
    os.chmod(os.path.join(_profile_path, 'cert8.db'), 0660)

    f = open(_version_file, 'w')
    f.write(str(PROFILE_VERSION))
    f.close()

def _seed_xs_cookie():
    ''' Create a HTTP Cookie to authenticate with the Schoolserver
    '''
    client = gconf.client_get_default()
    backup_url = client.get_string('/desktop/sugar/backup_url')
    if not backup_url:
        _logger.debug('seed_xs_cookie: Not registered with Schoolserver')
        return

    jabber_server = client.get_string(
        '/desktop/sugar/collaboration/jabber_server')

    pubkey = profile.get_profile().pubkey
    cookie_data = {'color': profile.get_color().to_string(),
                   'pkey_hash': sha.new(pubkey).hexdigest()}

    db_path = os.path.join(_profile_path, 'cookies.sqlite')
    try:
        cookies_db = sqlite3.connect(db_path)
        c = cookies_db.cursor()

        c.execute('''CREATE TABLE IF NOT EXISTS
                     moz_cookies 
                     (id INTEGER PRIMARY KEY,
                      name TEXT,
                      value TEXT,
                      host TEXT,
                      path TEXT,
                      expiry INTEGER,
                      lastAccessed INTEGER,
                      isSecure INTEGER,
                      isHttpOnly INTEGER)''')

        c.execute('''SELECT id
                     FROM moz_cookies
                     WHERE name=? AND host=? AND path=?''',
                  ('xoid', jabber_server, '/'))
        
        if c.fetchone():
            _logger.debug('seed_xs_cookie: Cookie exists already')
            return

        expire = int(time.time()) + 10*365*24*60*60
        c.execute('''INSERT INTO moz_cookies (name, value, host, 
                                              path, expiry, lastAccessed,
                                              isSecure, isHttpOnly)
                     VALUES(?,?,?,?,?,?,?,?)''',
                  ('xoid', cjson.encode(cookie_data), jabber_server,
                   '/', expire, 0, 0, 0 ))
        cookies_db.commit()
        cookies_db.close()
    except sqlite3.Error, e:
        _logger.error('seed_xs_cookie: %s' % e)
    else:
        _logger.debug('seed_xs_cookie: Updated cookie successfully')

import hulahop
hulahop.set_app_version(os.environ['SUGAR_BUNDLE_VERSION'])
hulahop.startup(_profile_path)

from xpcom import components
from xpcom.components import interfaces

def _set_accept_languages():
    ''' Set intl.accept_languages based on the locale
    '''
    try:
        lang = os.environ['LANG'].strip('\n') # e.g. es_UY.UTF-8 
    except KeyError:
        return

    if (not lang.endswith(".utf8") or not lang.endswith(".UTF-8")) \
            and lang[2] != "_":
        _logger.debug("Set_Accept_language: unrecognised LANG format")
        return 

    # e.g. es-uy, es
    pref = lang[0:2] + "-" + lang[3:5].lower()  + ", " + lang[0:2]
    cls = components.classes["@mozilla.org/preferences-service;1"]
    prefService = cls.getService(components.interfaces.nsIPrefService)
    branch = prefService.getBranch('')
    branch.setCharPref('intl.accept_languages', pref)
    logging.debug('LANG set')

from browser import Browser
from edittoolbar import EditToolbar
from webtoolbar import WebToolbar
from viewtoolbar import ViewToolbar
from bookmarklettoolbar import BookmarkletToolbar
import downloadmanager
import globalhistory
import filepicker
import bookmarklets
import usercode
import viewsource

_LIBRARY_PATH = '/usr/share/library-common/index.html'

def _set_dbus_globals(bundle_id):
    '''Set up the dbus strings, based on the bundle_id'''
    global SERVICE, IFACE, PATH
    SERVICE = bundle_id
    IFACE = bundle_id
    PATH = '/' + bundle_id.replace('.', '/')

from model import Model
from sugar.presence.tubeconn import TubeConnection
from messenger import Messenger
from linkbutton import LinkButton

_TOOLBAR_EDIT = 1
_TOOLBAR_BROWSE = 2
_TOOLBAR_BOOKMARKLETS = 4

_logger = logging.getLogger('web-activity')

class WebActivity(activity.Activity):
    def __init__(self, handle):
        activity.Activity.__init__(self, handle)

        _logger.debug('Starting the web activity')
        
        # figure out if we're an SSB
        self.is_ssb = ssb.get_is_ssb(self)

        self._browser = Browser()
        
        _set_accept_languages()
        _seed_xs_cookie()
        _set_dbus_globals(self.get_bundle_id())        
                        
        # don't pick up the sugar theme - use the native mozilla one instead
        cls = components.classes['@mozilla.org/preferences-service;1']
        pref_service = cls.getService(components.interfaces.nsIPrefService)
        branch = pref_service.getBranch("mozilla.widget.")
        branch.setBoolPref("disable-native-theme", True)

        toolbox = activity.ActivityToolbox(self)

        self._edit_toolbar = EditToolbar(self._browser)
        toolbox.add_toolbar(_('Edit'), self._edit_toolbar)
        self._edit_toolbar.show()

        self._web_toolbar = WebToolbar(self)
        toolbox.add_toolbar(_('Browse'), self._web_toolbar)
        self._web_toolbar.show()
       
        self._tray = HTray()
        self.set_tray(self._tray, gtk.POS_BOTTOM)
        self._tray.show()
        
        self._view_toolbar = ViewToolbar(self)
        toolbox.add_toolbar(_('View'), self._view_toolbar)
        self._view_toolbar.show()
        
        # the bookmarklet bar doesn't show up if empty
        self._bm_toolbar = None
            
        self.set_toolbox(toolbox)
        toolbox.show()        
                
        self.set_canvas(self._browser)
        self._browser.show()

        self._browser.history.connect('session-link-changed', 
                                      self._session_history_changed_cb)
        self._web_toolbar.connect('add-link', self._link_add_button_cb)

        self._browser.connect("notify::title", self._title_changed_cb)
        
        self._bm_store = bookmarklets.get_store()
        self._bm_store.connect('add_bookmarklet', self._add_bookmarklet_cb)
        self._bm_store.connect('overwrite_bookmarklet',
                               self._overwrite_bookmarklet_cb)
        for name in self._bm_store.list():
            self._add_bookmarklet(name)

        self.model = Model()
        self.model.connect('add_link', self._add_link_model_cb)

        self.current = _('blank')
        self.webtitle = _('blank')
        self.connect('key-press-event', self._key_press_cb)
                     
        self.toolbox.set_current_toolbar(_TOOLBAR_BROWSE)
                
        if self.is_ssb:
            # set permanent homepage for SSBs
            f = open(os.path.join(activity.get_bundle_path(),
                                  'data/homepage'))
            self.homepage = f.read()
            f.close()
            
        # enable userscript saving
        self._browser.userscript.connect('userscript-found',
                                         self._userscript_found_cb)    
        # enable userscript injecting
        self._browser.userscript.connect('userscript-inject',
                                         self._userscript_inject_cb)

        if handle.uri:
            self._browser.load_uri(handle.uri)        
        elif not self._jobject.file_path:
            # TODO: we need this hack until we extend the activity API for
            # opening URIs and default docs.
            self._load_homepage()

        self.messenger = None
        self.connect('shared', self._shared_cb)

        # Get the Presence Service        
        self.pservice = presenceservice.get_instance()
        try:
            name, path = self.pservice.get_preferred_connection()
            self.tp_conn_name = name
            self.tp_conn_path = path
            self.conn = telepathy.client.Connection(name, path)
        except TypeError:
            _logger.debug('Offline')
        self.initiating = None
            
        if self._shared_activity is not None:
            _logger.debug('shared:  %s' %self._shared_activity.props.joined)

        if self._shared_activity is not None:
            # We are joining the activity
            _logger.debug('Joined activity')                      
            self.connect('joined', self._joined_cb)
            if self.get_shared():
                # We've already joined
                self._joined_cb()
        else:   
            _logger.debug('Created activity')
    
    def _shared_cb(self, activity_):
        _logger.debug('My activity was shared')        
        self.initiating = True                        
        self._setup()

        _logger.debug('This is my activity: making a tube...')
        self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].OfferDBusTube(SERVICE, {})
                
    def _setup(self):
        if self._shared_activity is None:
            _logger.debug('Failed to share or join activity')
            return

        bus_name, conn_path, channel_paths = \
                self._shared_activity.get_channels()

        # Work out what our room is called and whether we have Tubes already
        room = None
        tubes_chan = None
        text_chan = None
        for channel_path in channel_paths:
            channel = telepathy.client.Channel(bus_name, channel_path)
            htype, handle = channel.GetHandle()
            if htype == telepathy.HANDLE_TYPE_ROOM:
                _logger.debug('Found our room: it has handle#%d "%s"' 
                    %(handle, self.conn.InspectHandles(htype, [handle])[0]))
                room = handle
                ctype = channel.GetChannelType()
                if ctype == telepathy.CHANNEL_TYPE_TUBES:
                    _logger.debug('Found our Tubes channel at %s'%channel_path)
                    tubes_chan = channel
                elif ctype == telepathy.CHANNEL_TYPE_TEXT:
                    _logger.debug('Found our Text channel at %s'%channel_path)
                    text_chan = channel

        if room is None:
            _logger.debug("Presence service didn't create a room")
            return
        if text_chan is None:
            _logger.debug("Presence service didn't create a text channel")
            return

        # Make sure we have a Tubes channel - PS doesn't yet provide one
        if tubes_chan is None:
            _logger.debug("Didn't find our Tubes channel, requesting one...")
            tubes_chan = self.conn.request_channel(telepathy.CHANNEL_TYPE_TUBES,
                                                   telepathy.HANDLE_TYPE_ROOM, 
                                                   room, True)

        self.tubes_chan = tubes_chan
        self.text_chan = text_chan

        tubes_chan[telepathy.CHANNEL_TYPE_TUBES].connect_to_signal( \
                'NewTube', self._new_tube_cb)

    def _list_tubes_reply_cb(self, tubes):
        for tube_info in tubes:
            self._new_tube_cb(*tube_info)

    def _list_tubes_error_cb(self, e):
        _logger.debug('ListTubes() failed: %s'%e)

    def _joined_cb(self, activity_):
        if not self._shared_activity:
            return

        _logger.debug('Joined an existing shared activity')
        
        self.initiating = False
        self._setup()
                
        _logger.debug('This is not my activity: waiting for a tube...')
        self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].ListTubes(
            reply_handler=self._list_tubes_reply_cb, 
            error_handler=self._list_tubes_error_cb)

    def _new_tube_cb(self, identifier, initiator, type, service, params, state):
        _logger.debug('New tube: ID=%d initator=%d type=%d service=%s '
                      'params=%r state=%d' %(identifier, initiator, type, 
                                             service, params, state))

        if (type == telepathy.TUBE_TYPE_DBUS and
            service == SERVICE):
            if state == telepathy.TUBE_STATE_LOCAL_PENDING:
                self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].AcceptDBusTube(
                        identifier)

            self.tube_conn = TubeConnection(self.conn, 
                self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES], 
                identifier, group_iface = self.text_chan[
                    telepathy.CHANNEL_INTERFACE_GROUP])
            
            _logger.debug('Tube created')
            self.messenger = Messenger(self.tube_conn, self.initiating, 
                                       self.model)         

             
    def _load_homepage(self):
        if self.is_ssb:
            self._browser.load_uri(self.homepage)
        elif os.path.isfile(_LIBRARY_PATH):
            self._browser.load_uri('file://' + _LIBRARY_PATH)
        else:
            default_page = os.path.join(activity.get_bundle_path(), 
                                        "data/index.html")
            self._browser.load_uri(default_page)
            
    def _session_history_changed_cb(self, session_history, link):
        _logger.debug('NewPage: %s.' %link)
        self.current = link
        
    def _title_changed_cb(self, embed, pspec):
        if embed.props.title is not '':
            _logger.debug('Title changed=%s' % embed.props.title)
            self.webtitle = embed.props.title

    def _get_data_from_file_path(self, file_path):
        fd = open(file_path, 'r')
        try:
            data = fd.read()
        finally:
            fd.close()
        return data

    def read_file(self, file_path):
        if self.metadata['mime_type'] == 'text/plain':
            data = self._get_data_from_file_path(file_path)
            self.model.deserialize(data)
            
            for link in self.model.data['shared_links']:
                _logger.debug('read: url=%s title=%s d=%s' % (link['url'],
                                                              link['title'],
                                                              link['color']))
                self._add_link_totray(link['url'],
                                      base64.b64decode(link['thumb']),
                                      link['color'], link['title'],
                                      link['owner'], -1, link['hash'])      
            self._browser.set_session(self.model.data['history'])
        elif self.metadata['mime_type'] == 'text/uri-list':
            data = self._get_data_from_file_path(file_path)
            uris = mime.split_uri_list(data)
            if len(uris) == 1:
                self._browser.load_uri(uris[0])
            else:
                _logger.error('Open uri-list: Does not support' 
                              'list of multiple uris by now.') 
        elif self.metadata['mime_type'] == 'application/zip':
            z = zipfile.ZipFile(file_path, 'r')
            
            html = None
            for i in z.namelist():
                if i.endswith('.html') or i.endswith('.htm'):
                    html = i
                    if i == 'index.html':
                        break
            
            if file_name != None:
                self._browser.load_uri('jar:file://%!%s' % (file_path, html))
            else:
                _logger.error('Open jar file: No html file to be opened')
            
        else:
            self._browser.load_uri(file_path)
        
    def write_file(self, file_path):
        if not self.metadata['mime_type']:
            self.metadata['mime_type'] = 'text/plain'
        
        if self.metadata['mime_type'] == 'text/plain':
            if not self._jobject.metadata['title_set_by_user'] == '1':
                if self._browser.props.title:
                    self.metadata['title'] = self._browser.props.title

            self.model.data['history'] = self._browser.get_session()

            f = open(file_path, 'w')
            try:
                f.write(self.model.serialize())
            finally:
                f.close()
                
    def save_document(self):
        logging.debug('Saving document to %s' % bundle_path)
        
        cls = components.classes[ \
                        '@mozilla.org/embedding/browser/nsWebBrowserPersist;1']
        persist = cls.createInstance(interfaces.nsIWebBrowserPersist)
        persist.persistFlags = interfaces.nsIWebBrowserPersist \
                                         .PERSIST_FLAGS_REPLACE_EXISTING_FILES

        local = components.classes["@mozilla.org/file/local;1"]
        local_file = local.createInstance(interfaces.nsILocalFile)
        local_data = local.createInstance(interfaces.nsILocalFile)

        temp_dir = tempfile.mkdtemp()

        local_file.initWithPath(os.path.join(temp_dir, 'index.html'))
        local_data.initWithPath(os.path.join(temp_dir, 'data'))

        persist.saveDocument(self._browser.dom_window.document,
                                     local_file, local_data, None, 0, 0)

        bundle_path = os.path.join(temp_dir, 'bundle.jar')
        bundle = zipfile.ZipFile(bundle_path, 'w')
        bundle.write(local_file.path)
        for i in os.listdir(local_data.path):
            bundle.write(os.path.join(local_data.path, i),
                         zipfile.ZIP_DEFLATED)
        bundle.close()
        
        jobject = datastore.create()
        jobject.metadata['title'] = self.title
        jobject.metadata['mime_type'] = 'application/zip'
        jobject.metadata['icon-color'] = profile.get_color().to_string()
        jobject.metadata['activity'] = 'org.laptop.WebActivity'
        jobject.file_path = bundle_path
    
        datastore.write(jobject)
        
        activity.show_object_in_journal(jobject.object_id)

        # cleanup
        shutil.rmtree(temp_dir)

    def _link_add_button_cb(self, button):
        _logger.debug('button: Add link: %s.' % self.current)                
        self._add_link()
            
    def _key_press_cb(self, widget, event):
        if event.state & gtk.gdk.CONTROL_MASK:
            if gtk.gdk.keyval_name(event.keyval) == "d":
                _logger.debug('keyboard: Add link: %s.' % self.current)     
                self._add_link()                
                return True
            elif gtk.gdk.keyval_name(event.keyval) == "f":
                _logger.debug('keyboard: Find')
                self.toolbox.set_current_toolbar(_TOOLBAR_EDIT)
                self._edit_toolbar.search_entry.grab_focus()
                return True
            elif gtk.gdk.keyval_name(event.keyval) == "l":
                _logger.debug('keyboard: Focus url entry')
                self.toolbox.set_current_toolbar(_TOOLBAR_BROWSE)
                self._web_toolbar.entry.grab_focus()
                return True
            elif gtk.gdk.keyval_name(event.keyval) == "minus":
                _logger.debug('keyboard: Zoom out')
                self._browser.zoom_out()
                return True
            elif gtk.gdk.keyval_name(event.keyval) == "plus" \
                     or gtk.gdk.keyval_name(event.keyval) == "equal" :
                _logger.debug('keyboard: Zoom in')
                self._browser.zoom_in()
                return True
        return False
        
    def _add_bookmarklet(self, name):
        '''add bookmarklet button and, if needed, the toolbar'''
        if self._bm_toolbar is None:
            self._bm_toolbar = BookmarkletToolbar(self)
            self.toolbox.add_toolbar(_('Bookmarklets'), self._bm_toolbar)
            self._bm_toolbar.show()
        
        if name not in self._bm_toolbar.bookmarklets:
            self._bm_toolbar.add_bookmarklet(name)
            
        return self._bm_toolbar.bookmarklets[name]
                
    def _add_bookmarklet_cb(self, store, name):
        '''receive name of new bookmarklet from the store'''
        bm = self._add_bookmarklet(name)
        bm.flash()
        
        self.toolbox.set_current_toolbar(_TOOLBAR_BOOKMARKLETS)

    def _overwrite_bookmarklet_cb(self, store, name, url):
        '''Ask for confirmation'''
        alert = ConfirmationAlert()
        alert.props.title = _('Add bookmarklet')
        alert.props.msg = _('"%s" already exists. Overwrite?') % name
        alert.connect('response', self._overwrite_bookmarklet_response_cb)
        
        # send the arguments through the alert object
        alert._bm = (name, url)
        
        self.add_alert(alert)
                
    def _overwrite_bookmarklet_response_cb(self, alert, response_id):
        self.remove_alert(alert)
        
        name, url = alert._bm # unpack the argument
        if response_id is gtk.RESPONSE_OK:
            self._bm_store.remove(name)
            self._bm_store.add(name, url)
            
    def _userscript_found_cb(self, listener, location):
        '''Ask user whether to install the userscript'''
        alert = ConfirmationAlert()
        alert.props.title = _('Add userscript')
        if usercode.script_exists(location):
            alert.props.msg = _('Userscript already exists. Overwrite?') 
        else:
            alert.props.msg = _('Do you want to add this userscript?')    
        alert.connect('response', self._userscript_found_response_cb)
                
        # send the argument through the alert object
        alert._location = location
        
        self.add_alert(alert)
        
    def _userscript_found_response_cb(self, alert, response_id):
        self.remove_alert(alert)
        
        if response_id is gtk.RESPONSE_OK:
            usercode.add_script(alert._location)
            
    def _userscript_inject_cb(self, listener, script_path):
        logging.debug('Injecting %s' % script_path)    
        usercode.Injector(script_path).attach_to(self._browser.dom_window)
        
    def _add_link(self):
        ''' take screenshot and add link info to the model '''
        for link in self.model.data['shared_links']:
            if link['hash'] == sha.new(self.current).hexdigest():
                _logger.debug('_add_link: link exist already a=%s b=%s' %(
                    link['hash'], sha.new(self.current).hexdigest()))
                return
        buf = self._get_screenshot()
        timestamp = time.time()
        self.model.add_link(self.current, self.webtitle, buf,
                            profile.get_nick_name(),
                            profile.get_color().to_string(), timestamp)

        if self.messenger is not None:
            self.messenger._add_link(self.current, self.webtitle,       
                                     profile.get_color().to_string(),
                                     profile.get_nick_name(),
                                     base64.b64encode(buf), timestamp)

    def _add_link_model_cb(self, model, index):
        ''' receive index of new link from the model '''
        link = self.model.data['shared_links'][index]
        self._add_link_totray(link['url'], base64.b64decode(link['thumb']),
                              link['color'], link['title'],
                              link['owner'], index, link['hash'])

    def _add_link_totray(self, url, buf, color, title, owner, index, hash):
        ''' add a link to the tray '''
        item = LinkButton(url, buf, color, title, owner, index, hash)
        item.connect('clicked', self._link_clicked_cb, url)
        item.connect('remove_link', self._link_removed_cb)
        self._tray.add_item(item, index) # use index to add to the tray
        item.show()
        if self._tray.props.visible is False:
            self._tray.show()        
        self._view_toolbar.traybutton.props.sensitive = True
        
    def _link_removed_cb(self, button, hash):
        ''' remove a link from tray and delete it in the model '''
        self.model.remove_link(hash)
        self._tray.remove_item(button)
        if len(self._tray.get_children()) == 0:
            self._view_toolbar.traybutton.props.sensitive = False

    def _link_clicked_cb(self, button, url):
        ''' an item of the link tray has been clicked '''
        self._browser.load_uri(url)

    def _pixbuf_save_cb(self, buf, data):
        data[0] += buf
        return True

    def get_buffer(self, pixbuf):
        data = [""]
        pixbuf.save_to_callback(self._pixbuf_save_cb, "png", {}, data)
        return str(data[0])

    def _get_screenshot(self):
        window = self._browser.window
        width, height = window.get_size()

        screenshot = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, has_alpha=False,
                                    bits_per_sample=8, width=width,
                                    height=height)
        screenshot.get_from_drawable(window, window.get_colormap(), 0, 0, 0, 0,
                                     width, height)

        screenshot = screenshot.scale_simple(style.zoom(100),
                                                 style.zoom(80),
                                                 gtk.gdk.INTERP_BILINEAR)

        buf = self.get_buffer(screenshot)
        return buf

    def can_close(self):
        if downloadmanager.can_quit():
            return True
        else:
            alert = Alert()
            alert.props.title = _('Download in progress')
            alert.props.msg = _('Stopping now will cancel your download')
            cancel_icon = Icon(icon_name='dialog-cancel')
            alert.add_button(gtk.RESPONSE_CANCEL, _('Cancel'), cancel_icon)
            stop_icon = Icon(icon_name='dialog-ok')
            alert.add_button(gtk.RESPONSE_OK, _('Stop'), stop_icon)
            stop_icon.show()
            self.add_alert(alert)
            alert.connect('response', self.__inprogress_response_cb)
            alert.show()            
            self.present()

    def __inprogress_response_cb(self, alert, response_id):
        self.remove_alert(alert)
        if response_id is gtk.RESPONSE_CANCEL:
            logging.debug('Keep on')
        elif response_id == gtk.RESPONSE_OK:
            logging.debug('Stop downloads and quit')
            downloadmanager.remove_all_downloads()
            self.close(force=True)

    #def handle_view_source(self):     
    #    logging.debug('##### local view source') 
    #    logging.debug('@@@@@ %s' % usercode.STYLE_PATH)  
    #    view_source = viewsource.ViewSource(self.get_xid(),                 
    #                                        self.get_bundle_path(),
    #                                        usercode.STYLE_PATH,
    #                                        self.get_title())
    #    view_source.show()

    def get_document_path(self, async_cb, async_err_cb):
        self._browser.get_source(async_cb, async_err_cb)