/usr/share/sugar/activities/Browse.activity/downloadmanager.py is in sugar-browse-activity 157.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2009, Tomeu Vizoso, Lucian Branescu
#
# 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 tempfile
import dbus
import cairo
import StringIO
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import WebKit
from gi.repository import GdkPixbuf
from gi.repository import GObject
from sugar3.datastore import datastore
from sugar3 import profile
from sugar3 import mime
from sugar3.graphics.alert import Alert, TimeoutAlert
from sugar3.graphics.icon import Icon
from sugar3.activity import activity
try:
from sugar3.activity.activity import launch_bundle, get_bundle
_HAS_BUNDLE_LAUNCHER = True
except ImportError:
_HAS_BUNDLE_LAUNCHER = False
DS_DBUS_SERVICE = 'org.laptop.sugar.DataStore'
DS_DBUS_INTERFACE = 'org.laptop.sugar.DataStore'
DS_DBUS_PATH = '/org/laptop/sugar/DataStore'
_active_downloads = []
_dest_to_window = {}
PROGRESS_TIMEOUT = 3000
SPACE_THRESHOLD = 52428800 # 50 Mb
def format_float(f):
return "%0.2f" % f
def can_quit():
return len(_active_downloads) == 0
def num_downloads():
return len(_active_downloads)
def remove_all_downloads():
for download in _active_downloads:
download.cancel()
if download.dl_jobject is not None:
datastore.delete(download.dl_jobject.object_id)
download.cleanup()
class Download(object):
def __init__(self, download, browser):
self._download = download
self._activity = browser.get_toplevel()
self._source = download.get_uri()
self._download.connect('notify::status', self.__state_change_cb)
self._download.connect('error', self.__error_cb)
self.datastore_deleted_handler = None
self.dl_jobject = None
self._object_id = None
self._stop_alert = None
self._progress = 0
self._last_update_progress = 0
self._progress_sid = None
# figure out download URI
self.temp_path = os.path.join(activity.get_activity_root(), 'instance')
if not os.path.exists(self.temp_path):
os.makedirs(self.temp_path)
fd, self._dest_path = tempfile.mkstemp(
dir=self.temp_path, suffix=download.get_suggested_filename(),
prefix='tmp')
os.close(fd)
logging.debug('Download destination path: %s' % self._dest_path)
# We have to start the download to get 'total-size'
# property. It not, 0 is returned
self._download.set_destination_uri('file://' + self._dest_path)
self._download.start()
def _update_progress(self):
if self._progress > self._last_update_progress:
self._last_update_progress = self._progress
self.dl_jobject.metadata['progress'] = str(self._progress)
datastore.write(self.dl_jobject)
self._progress_sid = None
return False
def __progress_change_cb(self, download, something):
self._progress = int(self._download.get_progress() * 100)
if self._progress_sid is None:
self._progress_sid = GObject.timeout_add(
PROGRESS_TIMEOUT, self._update_progress)
def __current_size_changed_cb(self, download, something):
current_size = self._download.get_current_size()
total_size = self._download.get_total_size()
self._progress = int(current_size * 100 / total_size)
if self._progress_sid is None:
self._progress_sid = GObject.timeout_add(
PROGRESS_TIMEOUT, self._update_progress)
def __state_change_cb(self, download, gparamspec):
state = self._download.get_status()
if state == WebKit.DownloadStatus.STARTED:
# Check free space and cancel the download if there is not enough.
total_size = self._download.get_total_size()
logging.debug('Total size of the file: %s', total_size)
enough_space = self.enough_space(
total_size, path=self.temp_path)
if not enough_space:
logging.debug('Download canceled because of Disk Space')
self.cancel()
self._canceled_alert = Alert()
self._canceled_alert.props.title = _('Not enough space '
'to download')
total_size_mb = total_size / 1024.0 ** 2
free_space_mb = (self._free_available_space(
path=self.temp_path) - SPACE_THRESHOLD) \
/ 1024.0 ** 2
filename = self._download.get_suggested_filename()
self._canceled_alert.props.msg = \
_('Download "%{filename}" requires %{total_size_in_mb}'
' MB of free space, only %{free_space_in_mb} MB'
' is available' %
{'filename': filename,
'total_size_in_mb': format_float(total_size_mb),
'free_space_in_mb': format_float(free_space_mb)})
ok_icon = Icon(icon_name='dialog-ok')
self._canceled_alert.add_button(Gtk.ResponseType.OK,
_('Ok'), ok_icon)
ok_icon.show()
self._canceled_alert.connect('response',
self.__stop_response_cb)
self._activity.add_alert(self._canceled_alert)
else:
# FIXME: workaround for SL #4385
# self._download.connect('notify::progress',
# self.__progress_change_cb)
self._download.connect('notify::current-size',
self.__current_size_changed_cb)
self._create_journal_object()
self._object_id = self.dl_jobject.object_id
alert = TimeoutAlert(9)
alert.props.title = _('Download started')
alert.props.msg = _('%s' %
self._download.get_suggested_filename())
self._activity.add_alert(alert)
alert.connect('response', self.__start_response_cb)
alert.show()
global _active_downloads
_active_downloads.append(self)
elif state == WebKit.DownloadStatus.FINISHED:
self._stop_alert = Alert()
self._stop_alert.props.title = _('Download completed')
self._stop_alert.props.msg = \
_('%s' % self._download.get_suggested_filename())
if self._progress_sid is not None:
GObject.source_remove(self._progress_sid)
self.dl_jobject.metadata['title'] = \
self._download.get_suggested_filename()
self.dl_jobject.metadata['description'] = _('From: %s') \
% self._source
self.dl_jobject.metadata['progress'] = '100'
self.dl_jobject.file_path = self._dest_path
# sniff for a mime type, no way to get headers from WebKit
sniffed_mime_type = mime.get_for_file(self._dest_path)
self.dl_jobject.metadata['mime_type'] = sniffed_mime_type
if sniffed_mime_type in ('image/bmp', 'image/gif', 'image/jpeg',
'image/png', 'image/tiff'):
preview = self._get_preview()
if preview is not None:
self.dl_jobject.metadata['preview'] = \
dbus.ByteArray(preview)
datastore.write(self.dl_jobject,
transfer_ownership=True,
reply_handler=self.__internal_save_cb,
error_handler=self.__internal_error_cb,
timeout=360)
bundle = None
if _HAS_BUNDLE_LAUNCHER:
bundle = get_bundle(object_id=self._object_id)
if bundle is not None:
icon = Icon(file=bundle.get_icon())
label = _('Open with %s') % bundle.get_name()
response_type = Gtk.ResponseType.APPLY
else:
icon = Icon(icon_name='zoom-activity')
label = _('Show in Journal')
response_type = Gtk.ResponseType.ACCEPT
self._stop_alert.add_button(response_type, label, icon)
icon.show()
ok_icon = Icon(icon_name='dialog-ok')
self._stop_alert.add_button(Gtk.ResponseType.OK, _('Ok'), ok_icon)
ok_icon.show()
self._activity.add_alert(self._stop_alert)
self._stop_alert.connect('response', self.__stop_response_cb)
self._stop_alert.show()
elif state == WebKit.DownloadStatus.CANCELLED:
self.cleanup()
def __error_cb(self, download, err_code, err_detail, reason):
logging.debug('Error downloading URI code %s, detail %s: %s'
% (err_code, err_detail, reason))
def __internal_save_cb(self):
logging.debug('Object saved succesfully to the datastore.')
self.cleanup()
def __internal_error_cb(self, err):
logging.debug('Error saving activity object to datastore: %s' % err)
self.cleanup()
def __start_response_cb(self, alert, response_id):
global _active_downloads
if response_id is Gtk.ResponseType.CANCEL:
logging.debug('Download Canceled')
self.cancel()
try:
datastore.delete(self._object_id)
except Exception, e:
logging.warning('Object has been deleted already %s' % e)
self.cleanup()
if self._stop_alert is not None:
self._activity.remove_alert(self._stop_alert)
self._activity.remove_alert(alert)
def __stop_response_cb(self, alert, response_id):
if response_id == Gtk.ResponseType.APPLY:
logging.debug('Start application with downloaded object')
launch_bundle(object_id=self._object_id)
if response_id == Gtk.ResponseType.ACCEPT:
activity.show_object_in_journal(self._object_id)
self._activity.remove_alert(alert)
def cleanup(self):
global _active_downloads
if self in _active_downloads:
_active_downloads.remove(self)
if self.datastore_deleted_handler is not None:
self.datastore_deleted_handler.remove()
self.datastore_deleted_handler = None
if os.path.isfile(self._dest_path):
os.remove(self._dest_path)
if self.dl_jobject is not None:
self.dl_jobject.destroy()
self.dl_jobject = None
def cancel(self):
self._download.cancel()
def enough_space(self, size, path='/'):
"""Check if there is enough (size) free space on path
size -- free space requested in Bytes
path -- device where the check will be done. For example: '/tmp'
This method is useful to check the free space, for example,
before starting a download from internet, creating a big map
in some game or whatever action that needs some space in the
Hard Disk.
"""
free_space = self._free_available_space(path=path)
return free_space - size > SPACE_THRESHOLD
def _free_available_space(self, path='/'):
"""Return available space in Bytes
This method returns the available free space in the 'path' and
returns this amount in Bytes.
"""
s = os.statvfs(path)
return s.f_bavail * s.f_frsize
def _create_journal_object(self):
self.dl_jobject = datastore.create()
self.dl_jobject.metadata['title'] = \
_('Downloading %(filename)s from \n%(source)s.') % \
{'filename': self._download.get_suggested_filename(),
'source': self._source}
self.dl_jobject.metadata['progress'] = '0'
self.dl_jobject.metadata['keep'] = '0'
self.dl_jobject.metadata['buddies'] = ''
self.dl_jobject.metadata['preview'] = ''
self.dl_jobject.metadata['icon-color'] = \
profile.get_color().to_string()
self.dl_jobject.metadata['mime_type'] = ''
self.dl_jobject.file_path = ''
datastore.write(self.dl_jobject)
bus = dbus.SessionBus()
obj = bus.get_object(DS_DBUS_SERVICE, DS_DBUS_PATH)
datastore_dbus = dbus.Interface(obj, DS_DBUS_INTERFACE)
self.datastore_deleted_handler = datastore_dbus.connect_to_signal(
'Deleted', self.__datastore_deleted_cb,
arg0=self.dl_jobject.object_id)
def _get_preview(self):
# This code borrows from sugar3.activity.Activity.get_preview
# to make the preview with cairo, and also uses GdkPixbuf to
# load any GdkPixbuf supported format.
pixbuf = GdkPixbuf.Pixbuf.new_from_file(self._dest_path)
image_width = pixbuf.get_width()
image_height = pixbuf.get_height()
preview_width, preview_height = activity.PREVIEW_SIZE
preview_surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
preview_width, preview_height)
cr = cairo.Context(preview_surface)
scale_w = preview_width * 1.0 / image_width
scale_h = preview_height * 1.0 / image_height
scale = min(scale_w, scale_h)
translate_x = int((preview_width - (image_width * scale)) / 2)
translate_y = int((preview_height - (image_height * scale)) / 2)
cr.translate(translate_x, translate_y)
cr.scale(scale, scale)
cr.set_source_rgba(1, 1, 1, 0)
cr.set_operator(cairo.OPERATOR_SOURCE)
cr.paint()
Gdk.cairo_set_source_pixbuf(cr, pixbuf, 0, 0)
cr.paint()
preview_str = StringIO.StringIO()
preview_surface.write_to_png(preview_str)
return preview_str.getvalue()
def __datastore_deleted_cb(self, uid):
logging.debug('Downloaded entry has been deleted'
' from the datastore: %r', uid)
global _active_downloads
if self in _active_downloads:
self.cancel()
self.cleanup()
def add_download(download, browser):
download = Download(download, browser)
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