"""Base class for Python-coded activities
This is currently the only reference for what an
activity must do to participate in the Sugar desktop.
"""
# Copyright (C) 2006-2007 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
from gettext import gettext as _
import logging
import os
import time
import tempfile
import gtk, gobject
import dbus
from sugar.presence import presenceservice
from sugar.activity.activityservice import ActivityService
from sugar.graphics import units
from sugar.graphics.window import Window
from sugar.graphics.toolbox import Toolbox
from sugar.graphics.toolbutton import ToolButton
from sugar.datastore import datastore
from sugar import wm
from sugar import profile
class ActivityToolbar(gtk.Toolbar):
def __init__(self, activity):
gtk.Toolbar.__init__(self)
self._activity = activity
activity.connect('shared', self._activity_shared_cb)
activity.connect('joined', self._activity_shared_cb)
if activity.metadata:
self.title = gtk.Entry()
self.title.set_size_request(int(gtk.gdk.screen_width() / 6), -1)
self.title.set_text(activity.metadata['title'])
self.title.connect('changed', self._title_changed_cb)
self._add_widget(self.title)
activity.metadata.connect('updated', self._jobject_updated_cb)
separator = gtk.SeparatorToolItem()
separator.props.draw = False
separator.set_expand(True);
self.insert(separator, -1)
separator.show()
self.save = ToolButton('document-save')
self.save.connect('clicked', self._save_clicked_cb)
self.insert(self.save, -1)
self.save.show()
self.share = ToolButton('stock-share-mesh')
self.share.connect('clicked', self._share_clicked_cb)
self.insert(self.share, -1)
if activity.get_shared():
self.share.set_sensitive(False)
self.share.show()
separator = gtk.SeparatorToolItem()
separator.props.draw = False
self.insert(separator, -1)
separator.show()
self.close = ToolButton('window-close')
self.close.connect('clicked', self._close_clicked_cb)
self.insert(self.close, -1)
self.close.show()
self._update_title_sid = None
def _share_clicked_cb(self, button):
self._activity.share()
def _save_clicked_cb(self, button):
self._activity.save()
def _close_clicked_cb(self, button):
self._activity.close()
self._activity.destroy()
def _jobject_updated_cb(self, jobject):
self.title.set_text(jobject['title'])
def _title_changed_cb(self, entry):
if not self._update_title_sid:
self._update_title_sid = gobject.timeout_add(1000, self._update_title_cb)
def _update_title_cb(self):
self._activity.metadata['title'] = self.title.get_text()
self._activity.metadata['title_set_by_user'] = '1'
self._activity.save()
self._update_title_sid = None
return False
def _add_widget(self, widget, expand=False):
tool_item = gtk.ToolItem()
tool_item.set_expand(expand)
tool_item.add(widget)
widget.show()
self.insert(tool_item, -1)
tool_item.show()
def _activity_shared_cb(self, activity):
self.share.set_sensitive(False)
class EditToolbar(gtk.Toolbar):
def __init__(self):
gtk.Toolbar.__init__(self)
self.undo = ToolButton('edit-undo')
self.insert(self.undo, -1)
self.undo.show()
self.redo = ToolButton('edit-redo')
self.insert(self.redo, -1)
self.redo.show()
separator = gtk.SeparatorToolItem()
separator.set_draw(True)
self.insert(separator, -1)
separator.show()
self.copy = ToolButton('edit-copy')
self.insert(self.copy, -1)
self.copy.show()
self.paste = ToolButton('edit-paste')
self.insert(self.paste, -1)
self.paste.show()
class ActivityToolbox(Toolbox):
def __init__(self, activity):
Toolbox.__init__(self)
self._activity_toolbar = ActivityToolbar(activity)
self.add_toolbar('Activity', self._activity_toolbar)
self._activity_toolbar.show()
def get_activity_toolbar(self):
return self._activity_toolbar
class Activity(Window, gtk.Container):
"""Base Activity class that all other Activities derive from."""
__gtype_name__ = 'SugarActivity'
__gsignals__ = {
'shared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([])),
'joined': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([]))
}
__gproperties__ = {
'active': (bool, None, None, False, gobject.PARAM_READWRITE)
}
def __init__(self, handle, create_jobject=True):
"""Initialise the Activity
handle -- sugar.activity.activityhandle.ActivityHandle
instance providing the activity id and access to the
presence service which *may* provide sharing for this
application
create_jobject -- boolean
define if it should create a journal object if we are
not resuming
Side effects:
Sets the gdk screen DPI setting (resolution) to the
Sugar screen resolution.
Connects our "destroy" message to our _destroy_cb
method.
Creates a base gtk.Window within this window.
Creates an ActivityService (self._bus) servicing
this application.
"""
Window.__init__(self)
self.connect('realize', self._realize_cb)
self.connect('delete-event', self._delete_event_cb)
self._active = False
self._activity_id = handle.activity_id
self._pservice = presenceservice.get_instance()
self._shared_activity = None
self._share_id = None
self._join_id = None
shared_activity = handle.get_shared_activity()
if shared_activity:
# Join an existing instance of this activity on the network
self._shared_activity = shared_activity
self._join_id = self._shared_activity.connect("joined", self._internal_joined_cb)
if not self._shared_activity.props.joined:
self._shared_activity.join()
else:
self._internal_joined_cb(self._shared_activity, True, None)
self._bus = ActivityService(self)
if handle.object_id:
self._jobject = datastore.get(handle.object_id)
self._jobject.object_id = ''
del self._jobject.metadata['ctime']
del self._jobject.metadata['mtime']
elif create_jobject:
logging.debug('Creating a jobject.')
self._jobject = datastore.create()
self._jobject.metadata['title'] = _('%s Activity') % get_bundle_name()
self._jobject.metadata['title_set_by_user'] = '0'
self._jobject.metadata['activity'] = self.get_service_name()
self._jobject.metadata['keep'] = '0'
self._jobject.metadata['buddies'] = ''
self._jobject.metadata['preview'] = ''
self._jobject.metadata['icon-color'] = profile.get_color().to_string()
self._jobject.file_path = ''
datastore.write(self._jobject,
reply_handler=self._internal_jobject_create_cb,
error_handler=self._internal_jobject_error_cb)
else:
self._jobject = None
def do_set_property(self, pspec, value):
if pspec.name == 'active':
if self._active != value:
self._active = value
if not self._active and self._jobject:
self.save()
def do_get_property(self, pspec):
if pspec.name == 'active':
return self._active
def get_id(self):
return self._activity_id
def get_service_name(self):
return os.environ['SUGAR_BUNDLE_SERVICE_NAME']
def set_canvas(self, canvas):
Window.set_canvas(self, canvas)
canvas.connect('map', self._canvas_map_cb)
def _canvas_map_cb(self, canvas):
if self._jobject and self._jobject.file_path:
self.read_file(self._jobject.file_path)
def _internal_jobject_create_cb(self):
pass
def _internal_jobject_error_cb(self, err):
logging.debug("Error creating activity datastore object: %s" % err)
def read_file(self, file_path):
"""
Subclasses implement this method if they support resuming objects from
the journal. 'file_path' is the file to read from.
"""
raise NotImplementedError
def write_file(self, file_path):
"""
Subclasses implement this method if they support saving data to objects
in the journal. 'file_path' is the file to write to.
"""
raise NotImplementedError
def _internal_save_cb(self):
pass
def _internal_save_error_cb(self, err):
logging.debug("Error saving activity object to datastore: %s" % err)
def save(self):
"""Request that the activity is saved to the Journal."""
preview_pixbuf = self.get_canvas_screenshot()
preview_pixbuf = preview_pixbuf.scale_simple(units.grid_to_pixels(4),
units.grid_to_pixels(3),
gtk.gdk.INTERP_BILINEAR)
# TODO: Find a way of taking a png out of the pixbuf without saving to a temp file.
fd, file_path = tempfile.mkstemp('.png')
del fd
preview_pixbuf.save(file_path, 'png')
f = open(file_path)
try:
preview_data = f.read()
finally:
f.close()
os.remove(file_path)
# TODO: Take this out when the datastore accepts binary data.
import base64
self.metadata['preview'] = base64.b64encode(preview_data)
try:
file_path = os.path.join(tempfile.gettempdir(), '%i' % time.time())
self.write_file(file_path)
self._jobject.file_path = file_path
except NotImplementedError:
pass
datastore.write(self._jobject,
reply_handler=self._internal_save_cb,
error_handler=self._internal_save_error_cb)
def _internal_joined_cb(self, activity, success, err):
"""Callback when join has finished"""
self._shared_activity.disconnect(self._join_id)
self._join_id = None
if not success:
logging.debug("Failed to join activity: %s" % err)
return
self.present()
self.emit('joined')
def get_shared(self):
"""Returns TRUE if the activity is shared on the mesh."""
if not self._shared_activity:
return False
return self._shared_activity.props.joined
def _internal_share_cb(self, ps, success, activity, err):
self._pservice.disconnect(self._share_id)
self._share_id = None
if not success:
logging.debug('Share of activity %s failed: %s.' % (self._activity_id, err))
return
logging.debug('Share of activity %s successful.' % self._activity_id)
self._shared_activity = activity
self.emit('shared')
def share(self):
"""Request that the activity be shared on the network."""
if self._shared_activity and self._shared_activity.props.joined:
raise RuntimeError("Activity %s already shared." % self._activity_id)
logging.debug('Requesting share of activity %s.' % self._activity_id)
self._share_id = self._pservice.connect("activity-shared", self._internal_share_cb)
self._pservice.share_activity(self)
def execute(self, command, args):
"""Execute the given command with args"""
return False
def _realize_cb(self, window):
wm.set_bundle_id(window.window, self.get_service_name())
wm.set_activity_id(window.window, self._activity_id)
def _delete_event_cb(self, window, event):
self.close()
return False
def close(self):
if self._bus:
del self._bus
self._bus = None
if self._shared_activity:
self._shared_activity.leave()
self.save()
def get_metadata(self):
if self._jobject:
return self._jobject.metadata
else:
return None
metadata = property(get_metadata, None)
def get_bundle_name():
"""Return the bundle name for the current process' bundle
"""
return os.environ['SUGAR_BUNDLE_NAME']
def get_bundle_path():
"""Return the bundle path for the current process' bundle
"""
return os.environ['SUGAR_BUNDLE_PATH']