"""Base class for activities written in Python This is currently the only definitive reference for what an activity must do to participate in the Sugar desktop. A Basic Activity All activities must implement a class derived from 'Activity' in this class. The convention is to call it ActivitynameActivity, but this is not required as the activity.info file associated with your activity will tell the sugar-shell which class to start. For example the most minimal Activity: from sugar.activity import activity class ReadActivity(activity.Activity): pass To get a real, working activity, you will at least have to implement: __init__(), read_file() and write_file() Aditionally, you will probably need a at least a Toolbar so you can have some interesting buttons for the user, like for example 'exit activity' See the methods of the Activity class below for more information on what you will need for a real activity. STABLE. """ # Copyright (C) 2006-2007 Red Hat, Inc. # Copyright (C) 2007-2009 One Laptop Per Child # # 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. import gettext import logging import os import time from hashlib import sha1 import traceback import gconf import gtk import gobject import dbus import dbus.service import cjson from sugar import util from sugar.presence import presenceservice from sugar.activity.activityservice import ActivityService from sugar.activity.namingalert import NamingAlert from sugar.graphics import style from sugar.graphics.window import Window from sugar.graphics.toolbox import Toolbox from sugar.graphics.toolbutton import ToolButton from sugar.graphics.toolcombobox import ToolComboBox from sugar.graphics.alert import Alert from sugar.graphics.icon import Icon from sugar.graphics.xocolor import XoColor from sugar.datastore import datastore from sugar.session import XSMPClient from sugar import wm _ = lambda msg: gettext.dgettext('sugar-toolkit', msg) SCOPE_PRIVATE = "private" SCOPE_INVITE_ONLY = "invite" # shouldn't be shown in UI, it's implicit SCOPE_NEIGHBORHOOD = "public" J_DBUS_SERVICE = 'org.laptop.Journal' J_DBUS_PATH = '/org/laptop/Journal' J_DBUS_INTERFACE = 'org.laptop.Journal' class ActivityToolbar(gtk.Toolbar): """The Activity toolbar with the Journal entry title, sharing, Keep and Stop buttons All activities should have this toolbar. It is easiest to add it to your Activity by using the ActivityToolbox. """ def __init__(self, activity): gtk.Toolbar.__init__(self) self._activity = activity self._updating_share = False activity.connect('shared', self.__activity_shared_cb) activity.connect('joined', self.__activity_shared_cb) activity.connect('notify::max_participants', self.__max_participants_changed_cb) if activity.metadata: self.title = gtk.Entry() self.title.set_size_request(int(gtk.gdk.screen_width() / 3), -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.share = ToolComboBox(label_text=_('Share with:')) self.share.combo.connect('changed', self.__share_changed_cb) self.share.combo.append_item(SCOPE_PRIVATE, _('Private'), 'zoom-home') self.share.combo.append_item(SCOPE_NEIGHBORHOOD, _('My Neighborhood'), 'zoom-neighborhood') self.insert(self.share, -1) self.share.show() self._update_share() self.keep = ToolButton(tooltip=_('Keep')) client = gconf.client_get_default() color = XoColor(client.get_string('/desktop/sugar/user/color')) keep_icon = Icon(icon_name='document-save', xo_color=color) self.keep.set_icon_widget(keep_icon) keep_icon.show() self.keep.props.accelerator = 'S' self.keep.connect('clicked', self.__keep_clicked_cb) self.insert(self.keep, -1) self.keep.show() self.stop = ToolButton('activity-stop', tooltip=_('Stop')) self.stop.props.accelerator = 'Q' self.stop.connect('clicked', self.__stop_clicked_cb) self.insert(self.stop, -1) self.stop.show() self._update_title_sid = None def _update_share(self): self._updating_share = True if self._activity.props.max_participants == 1: self.share.hide() if self._activity.get_shared(): self.share.set_sensitive(False) self.share.combo.set_active(1) else: self.share.set_sensitive(True) self.share.combo.set_active(0) self._updating_share = False def __share_changed_cb(self, combo): if self._updating_share: return model = self.share.combo.get_model() it = self.share.combo.get_active_iter() (scope, ) = model.get(it, 0) if scope == SCOPE_NEIGHBORHOOD: self._activity.share() def __keep_clicked_cb(self, button): self._activity.copy() def __stop_clicked_cb(self, button): self._activity.close() 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_seconds( 1, self.__update_title_cb) def __update_title_cb(self): title = self.title.get_text() self._activity.metadata['title'] = title self._activity.metadata['title_set_by_user'] = '1' self._activity.save() shared_activity = self._activity.get_shared_activity() if shared_activity: shared_activity.props.name = title 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._update_share() def __max_participants_changed_cb(self, activity, pspec): self._update_share() class EditToolbar(gtk.Toolbar): """Provides the standard edit toolbar for Activities. Members: undo -- the undo button redo -- the redo button copy -- the copy button paste -- the paste button separator -- A separator between undo/redo and copy/paste This class only provides the 'edit' buttons in a standard layout, your activity will need to either hide buttons which make no sense for your Activity, or you need to connect the button events to your own callbacks: ## Example from Read.activity: # Create the edit toolbar: self._edit_toolbar = EditToolbar(self._view) # Hide undo and redo, they're not needed self._edit_toolbar.undo.props.visible = False self._edit_toolbar.redo.props.visible = False # Hide the separator too: self._edit_toolbar.separator.props.visible = False # As long as nothing is selected, copy needs to be insensitive: self._edit_toolbar.copy.set_sensitive(False) # When the user clicks the button, call _edit_toolbar_copy_cb() self._edit_toolbar.copy.connect('clicked', self._edit_toolbar_copy_cb) # Add the edit toolbar: toolbox.add_toolbar(_('Edit'), self._edit_toolbar) # And make it visible: self._edit_toolbar.show() """ def __init__(self): gtk.Toolbar.__init__(self) self.undo = ToolButton('edit-undo') self.undo.set_tooltip(_('Undo')) self.insert(self.undo, -1) self.undo.show() self.redo = ToolButton('edit-redo') self.redo.set_tooltip(_('Redo')) self.insert(self.redo, -1) self.redo.show() self.separator = gtk.SeparatorToolItem() self.separator.set_draw(True) self.insert(self.separator, -1) self.separator.show() self.copy = ToolButton('edit-copy') self.copy.set_tooltip(_('Copy')) self.insert(self.copy, -1) self.copy.show() self.paste = ToolButton('edit-paste') self.paste.set_tooltip(_('Paste')) self.insert(self.paste, -1) self.paste.show() class ActivityToolbox(Toolbox): """Creates the Toolbox for the Activity By default, the toolbox contains only the ActivityToolbar. After creating the toolbox, you can add your activity specific toolbars, for example the EditToolbar. To add the ActivityToolbox to your Activity in MyActivity.__init__() do: # Create the Toolbar with the ActivityToolbar: toolbox = activity.ActivityToolbox(self) ... your code, inserting all other toolbars you need, like EditToolbar # Add the toolbox to the activity frame: self.set_toolbox(toolbox) # And make it visible: toolbox.show() """ 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 _ActivitySession(gobject.GObject): __gsignals__ = { 'quit-requested': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([])), 'quit': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([])) } def __init__(self): gobject.GObject.__init__(self) self._xsmp_client = XSMPClient() self._xsmp_client.connect('quit-requested', self.__sm_quit_requested_cb) self._xsmp_client.connect('quit', self.__sm_quit_cb) self._xsmp_client.startup() self._activities = [] self._will_quit = [] def register(self, activity): self._activities.append(activity) def unregister(self, activity): self._activities.remove(activity) if len(self._activities) == 0: logging.debug('Quitting the activity process.') gtk.main_quit() def will_quit(self, activity, will_quit): if will_quit: self._will_quit.append(activity) # We can quit only when all the instances agreed to for activity in self._activities: if activity not in self._will_quit: return self._xsmp_client.will_quit(True) else: self._will_quit = [] self._xsmp_client.will_quit(False) def __sm_quit_requested_cb(self, client): self.emit('quit-requested') def __sm_quit_cb(self, client): self.emit('quit') class Activity(Window, gtk.Container): """This is the base Activity class that all other Activities derive from. This is where your activity starts. To get a working Activity: 0. Derive your Activity from this class: class MyActivity(activity.Activity): ... 1. implement an __init__() method for your Activity class. Use your init method to create your own ActivityToolbar which will contain some standard buttons: toolbox = activity.ActivityToolbox(self) Add extra Toolbars to your toolbox. You should setup Activity sharing here too. Finaly, your Activity may need some resources which you can claim here too. The __init__() method is also used to make the distinction between being resumed from the Journal, or starting with a blank document. 2. Implement read_file() and write_file() Most activities revolve around creating and storing Journal entries. For example, Write: You create a document, it is saved to the Journal and then later you resume working on the document. read_file() and write_file() will be called by sugar to tell your Activity that it should load or save the document the user is working on. 3. Implement our Activity Toolbars. The Toolbars are added to your Activity in step 1 (the toolbox), but you need to implement them somewhere. Now is a good time. There are a number of standard Toolbars. The most basic one, the one your almost absolutely MUST have is the ActivityToolbar. Without this, you're not really making a proper Sugar Activity (which may be okay, but you should really stop and think about why not!) You do this with the ActivityToolbox(self) call in step 1. Usually, you will also need the standard EditToolbar. This is the one which has the standard copy and paste buttons. You need to derive your own EditToolbar class from sugar.EditToolbar: class EditToolbar(activity.EditToolbar): ... See EditToolbar for the methods you should implement in your class. Finaly, your Activity will very likely need some activity specific buttons and options you can create your own toolbars by deriving a class from gtk.Toolbar: class MySpecialToolbar(gtk.Toolbar): ... 4. Use your creativity. Make your Activity something special and share it with your friends! Read through the methods of the Activity class below, to learn more about how to make an Activity work. Hint: A good and simple Activity to learn from is the Read activity. To create your own activity, you may want to copy it and use it as a template. """ __gtype_name__ = 'SugarActivity' __gsignals__ = { 'shared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([])), 'joined': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([])) } 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. Usage: If your Activity implements __init__(), it should call the base class __init()__ before doing Activity specific things. """ Window.__init__(self) # process titles will only show 15 characters # but they get truncated anyway so if more characters # are supported in the future we will get a better view # of the processes proc_title = "%s <%s>" % (get_bundle_name(), handle.activity_id) util.set_proc_title(proc_title) 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 self._updating_jobject = False self._closing = False self._quit_requested = False self._deleting = False self._max_participants = 0 self._invites_queue = [] self._jobject = None self._read_file_called = False self._session = _get_session() self._session.register(self) self._session.connect('quit-requested', self.__session_quit_requested_cb) self._session.connect('quit', self.__session_quit_cb) accel_group = gtk.AccelGroup() self.set_data('sugar-accel-group', accel_group) self.add_accel_group(accel_group) self._bus = ActivityService(self) self._owns_file = False share_scope = SCOPE_PRIVATE if handle.object_id: self._jobject = datastore.get(handle.object_id) self.set_title(self._jobject.metadata['title']) if self._jobject.metadata.has_key('share-scope'): share_scope = self._jobject.metadata['share-scope'] # handle activity share/join mesh_instance = self._pservice.get_activity(self._activity_id, warn_if_none=False) logging.debug("*** Act %s, mesh instance %r, scope %s", self._activity_id, mesh_instance, share_scope) if mesh_instance is not None: # There's already an instance on the mesh, join it logging.debug("*** Act %s joining existing mesh instance %r", self._activity_id, mesh_instance) self.shared_activity = mesh_instance self.shared_activity.connect('notify::private', self.__privacy_changed_cb) self._join_id = self.shared_activity.connect("joined", self.__joined_cb) if not self.shared_activity.props.joined: self.shared_activity.join() else: self.__joined_cb(self.shared_activity, True, None) elif share_scope != SCOPE_PRIVATE: logging.debug("*** Act %s no existing mesh instance, but used to " \ "be shared, will share" % self._activity_id) # no existing mesh instance, but activity used to be shared, so # restart the share if share_scope == SCOPE_INVITE_ONLY: self.share(private=True) elif share_scope == SCOPE_NEIGHBORHOOD: self.share(private=False) else: logging.debug("Unknown share scope %r" % share_scope) if handle.object_id is None and create_jobject: logging.debug('Creating a jobject.') self._jobject = datastore.create() title = _('%s Activity') % get_bundle_name() self._jobject.metadata['title'] = title self.set_title(self._jobject.metadata['title']) self._jobject.metadata['title_set_by_user'] = '0' self._jobject.metadata['activity'] = self.get_bundle_id() self._jobject.metadata['activity_id'] = self.get_id() self._jobject.metadata['keep'] = '0' self._jobject.metadata['preview'] = '' self._jobject.metadata['share-scope'] = SCOPE_PRIVATE if self.shared_activity is not None: icon_color = self.shared_activity.props.color else: client = gconf.client_get_default() icon_color = client.get_string('/desktop/sugar/user/color') self._jobject.metadata['icon-color'] = icon_color self._jobject.file_path = '' # Cannot call datastore.write async for creates: # https://dev.laptop.org/ticket/3071 datastore.write(self._jobject) def get_active(self): return self._active def set_active(self, active): if self._active != active: self._active = active if not self._active and self._jobject: self.save() active = gobject.property( type=bool, default=False, getter=get_active, setter=set_active) def get_max_participants(self): return self._max_participants def set_max_participants(self, participants): self._max_participants = participants max_participants = gobject.property( type=int, default=0, getter=get_max_participants, setter=set_max_participants) def get_id(self): """Returns the activity id of the current instance of your activity. The activity id is sort-of-like the unix process id (PID). However, unlike PIDs it is only different for each new instance (with create_jobject = True set) and stays the same everytime a user resumes an activity. This is also the identity of your Activity to other XOs for use when sharing. """ return self._activity_id def get_bundle_id(self): """Returns the bundle_id from the activity.info file""" return os.environ['SUGAR_BUNDLE_ID'] def set_canvas(self, canvas): """Sets the 'work area' of your activity with the canvas of your choice. One commonly used canvas is gtk.ScrolledWindow """ Window.set_canvas(self, canvas) if not self._read_file_called: canvas.connect('map', self.__canvas_map_cb) def __session_quit_requested_cb(self, session): self._quit_requested = True if not self._prepare_close(): session.will_quit(self, False) elif not self._updating_jobject: session.will_quit(self, True) def __session_quit_cb(self, client): self._complete_close() def __canvas_map_cb(self, canvas): logging.debug('Activity.__canvas_map_cb') if self._jobject and self._jobject.file_path and \ not self._read_file_called: self.read_file(self._jobject.file_path) self._read_file_called = True canvas.disconnect_by_func(self.__canvas_map_cb) def __jobject_create_cb(self): pass def __jobject_error_cb(self, err): logging.debug("Error creating activity datastore object: %s" % err) def get_activity_root(self): """ FIXME: Deprecated. This part of the API has been moved out of this class to the module itself Returns a path for saving Activity specific preferences, etc. Returns a path to the location in the filesystem where the activity can store activity related data that doesn't pertain to the current execution of the activity and thus cannot go into the DataStore. Currently, this will return something like ~/.sugar/default/MyActivityName/ Activities should ONLY save settings, user preferences and other data which isn't specific to a journal item here. If (meta-)data is in anyway specific to a journal entry, it MUST be stored in the DataStore. """ if os.environ.has_key('SUGAR_ACTIVITY_ROOT') and \ os.environ['SUGAR_ACTIVITY_ROOT']: return os.environ['SUGAR_ACTIVITY_ROOT'] else: return '/' 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. You should immediately open the file from the file_path, because the file_name will be deleted immediately after returning from read_file(). Once the file has been opened, you do not have to read it immediately: After you have opened it, the file will only be really gone when you close it. Although not required, this is also a good time to read all meta-data: the file itself cannot be changed externally, but the title, description and other metadata['tags'] may change. So if it is important for you to notice changes, this is the time to record the originals. """ 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. If the user did make changes, you should create the file_path and save all document data to it. Additionally, you should also write any metadata needed to resume your activity. For example, the Read activity saves the current page and zoom level, so it can display the page. Note: Currently, the file_path *WILL* be different from the one you received in file_read(). Even if you kept the file_path from file_read() open until now, you must still write the entire file to this file_path. """ raise NotImplementedError def __save_cb(self): logging.debug('Activity.__save_cb') self._updating_jobject = False if self._quit_requested: self._session.will_quit(self, True) elif self._closing: self._complete_close() def __save_error_cb(self, err): logging.debug('Activity.__save_error_cb') self._updating_jobject = False if self._quit_requested: self._session.will_quit(self, False) if self._closing: self._show_keep_failed_dialog() self._closing = False logging.debug("Error saving activity object to datastore: %s" % err) def _cleanup_jobject(self): if self._jobject: if self._owns_file and os.path.isfile(self._jobject.file_path): logging.debug('_cleanup_jobject: removing %r' % self._jobject.file_path) os.remove(self._jobject.file_path) self._owns_file = False self._jobject.destroy() self._jobject = None def get_preview(self): """Returns an image representing the state of the activity. Generally this is what the user is seeing in this moment. Activities can override this method, which should return a str with the binary content of a png image with a width of 300 and a height of 225 pixels. """ if self.canvas is None or not hasattr(self.canvas, 'get_snapshot'): return None pixmap = self.canvas.get_snapshot((-1, -1, 0, 0)) width, height = pixmap.get_size() pixbuf = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, 0, 8, width, height) pixbuf = pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(), 0, 0, 0, 0, width, height) pixbuf = pixbuf.scale_simple(style.zoom(300), style.zoom(225), gtk.gdk.INTERP_BILINEAR) preview_data = [] def save_func(buf, data): data.append(buf) pixbuf.save_to_callback(save_func, 'png', user_data=preview_data) preview_data = ''.join(preview_data) return preview_data def _get_buddies(self): if self.shared_activity is not None: buddies = {} for buddy in self.shared_activity.get_joined_buddies(): if not buddy.props.owner: buddy_id = sha1(buddy.props.key).hexdigest() buddies[buddy_id] = [buddy.props.nick, buddy.props.color] return buddies else: return {} def save(self): """Request that the activity is saved to the Journal. This method is called by the close() method below. In general, activities should not override this method. This method is part of the public API of an Acivity, and should behave in standard ways. Use your own implementation of write_file() to save your Activity specific data. """ if self._jobject is None: logging.debug('Cannot save, no journal object.') return logging.debug('Activity.save: %r' % self._jobject.object_id) if self._updating_jobject: logging.info('Activity.save: still processing a previous request.') return buddies_dict = self._get_buddies() if buddies_dict: self.metadata['buddies_id'] = cjson.encode(buddies_dict.keys()) self.metadata['buddies'] = cjson.encode(self._get_buddies()) preview = self.get_preview() if preview is not None: self.metadata['preview'] = dbus.ByteArray(preview) file_path = os.path.join(self.get_activity_root(), 'instance', '%i' % time.time()) try: self.write_file(file_path) except NotImplementedError: logging.debug('Activity.write_file is not implemented.') else: if os.path.exists(file_path): self._owns_file = True self._jobject.file_path = file_path # Cannot call datastore.write async for creates: # https://dev.laptop.org/ticket/3071 if self._jobject.object_id is None: datastore.write(self._jobject, transfer_ownership=True) else: self._updating_jobject = True datastore.write(self._jobject, transfer_ownership=True, reply_handler=self.__save_cb, error_handler=self.__save_error_cb) def copy(self): """Request that the activity 'Keep in Journal' the current state of the activity. Activities should not override this method. Instead, like save() do any copy work that needs to be done in write_file() """ logging.debug('Activity.copy: %r' % self._jobject.object_id) self.save() self._jobject.object_id = None def __privacy_changed_cb(self, shared_activity, param_spec): if shared_activity.props.private: self._jobject.metadata['share-scope'] = SCOPE_INVITE_ONLY else: self._jobject.metadata['share-scope'] = SCOPE_NEIGHBORHOOD def __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') self.__privacy_changed_cb(self.shared_activity, None) def get_shared_activity(self): """Returns an instance of the shared Activity or None The shared activity is of type sugar.presence.activity.Activity """ return self._shared_activity 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 __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, PS activity is %r.', self._activity_id, activity) activity.props.name = self._jobject.metadata['title'] self.shared_activity = activity self.shared_activity.connect('notify::private', self.__privacy_changed_cb) self.emit('shared') self.__privacy_changed_cb(self.shared_activity, None) self._send_invites() def _invite_response_cb(self, error): if error: logging.error('Invite failed: %s' % error) def _send_invites(self): while self._invites_queue: buddy_key = self._invites_queue.pop() buddy = self._pservice.get_buddy(buddy_key) if buddy: self.shared_activity.invite( buddy, '', self._invite_response_cb) else: logging.error('Cannot invite %s, no such buddy.' % buddy_key) def invite(self, buddy_key): """Invite a buddy to join this Activity. Side Effects: Calls self.share(True) to privately share the activity if it wasn't shared before. """ self._invites_queue.append(buddy_key) if (self.shared_activity is None or not self.shared_activity.props.joined): self.share(True) else: self._send_invites() def share(self, private=False): """Request that the activity be shared on the network. private -- bool: True to share by invitation only, False to advertise as shared to everyone. Once the activity is shared, its privacy can be changed by setting its 'private' property. """ if self.shared_activity and self.shared_activity.props.joined: raise RuntimeError("Activity %s already shared." % self._activity_id) verb = private and 'private' or 'public' logging.debug('Requesting %s share of activity %s.' % (verb, self._activity_id)) self._share_id = self._pservice.connect("activity-shared", self.__share_cb) self._pservice.share_activity(self, private=private) def _show_keep_failed_dialog(self): alert = Alert() alert.props.title = _('Keep error') alert.props.msg = _('Keep error: all changes will be lost') cancel_icon = Icon(icon_name='dialog-cancel') alert.add_button(gtk.RESPONSE_CANCEL, _('Don\'t stop'), cancel_icon) stop_icon = Icon(icon_name='dialog-ok') alert.add_button(gtk.RESPONSE_OK, _('Stop anyway'), stop_icon) self.add_alert(alert) alert.connect('response', self._keep_failed_dialog_response_cb) self.present() def _keep_failed_dialog_response_cb(self, alert, response_id): self.remove_alert(alert) if response_id == gtk.RESPONSE_OK: self.close(skip_save=True) def can_close(self): """Activities should override this function if they want to perform extra checks before actually closing.""" return True def _prepare_close(self, skip_save=False): if not skip_save: try: self.save() except: logging.info(traceback.format_exc()) self._show_keep_failed_dialog() return False if self.shared_activity: self.shared_activity.leave() self._closing = True return True def _complete_close(self): self._cleanup_jobject() self.destroy() # Make the exported object inaccessible dbus.service.Object.remove_from_connection(self._bus) self._session.unregister(self) def close(self, skip_save=False): """Request that the activity be stopped and saved to the Journal Activities should not override this method, but should implement write_file() to do any state saving instead. If the application wants to control wether it can close, it should override can_close(). """ if not self.can_close(): return if skip_save or self.metadata.get('title_set_by_user', '0') == '1': if not self._closing: if not self._prepare_close(skip_save): return if not self._updating_jobject: self._complete_close() else: title_alert = NamingAlert(self, get_bundle_path()) title_alert.set_transient_for(self.get_toplevel()) title_alert.show() self.present() def __realize_cb(self, window): wm.set_bundle_id(window.window, self.get_bundle_id()) wm.set_activity_id(window.window, str(self._activity_id)) def __delete_event_cb(self, widget, event): self.close() return True def get_metadata(self): """Returns the jobject metadata or None if there is no jobject. Activities can set metadata in write_file() using: self.metadata['MyKey'] = "Something" and retrieve metadata in read_file() using: self.metadata.get('MyKey', 'aDefaultValue') Note: Make sure your activity works properly if one or more of the metadata items is missing. Never assume they will all be present. """ if self._jobject: return self._jobject.metadata else: return None metadata = property(get_metadata, None) def handle_view_source(self): raise NotImplementedError def get_document_path(self, async_cb, async_err_cb): async_err_cb(NotImplementedError()) # DEPRECATED _shared_activity = property(lambda self: self.shared_activity, None) _session = None def _get_session(): global _session if _session is None: _session = _ActivitySession() return _session 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'] def get_activity_root(): """Returns a path for saving Activity specific preferences, etc.""" if os.environ.has_key('SUGAR_ACTIVITY_ROOT') and \ os.environ['SUGAR_ACTIVITY_ROOT']: return os.environ['SUGAR_ACTIVITY_ROOT'] else: raise RuntimeError("No SUGAR_ACTIVITY_ROOT set.") def show_object_in_journal(object_id): bus = dbus.SessionBus() obj = bus.get_object(J_DBUS_SERVICE, J_DBUS_PATH) journal = dbus.Interface(obj, J_DBUS_INTERFACE) journal.ShowObject(object_id)