sugar-toolkit-gtk3/shell/model/homemodel.py

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2007-06-24 14:45:05 +02:00
# Copyright (C) 2006-2007 Owen Williams.
#
# 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 logging
import gobject
import wnck
import dbus
from sugar import wm
from sugar import activity
from model.homeactivity import HomeActivity
class HomeModel(gobject.GObject):
"""Model of the "Home" view (activity management)
The HomeModel is basically the point of registration
for all running activities within Sugar. It traps
events that tell the system there is a new activity
being created (generated by the activity factories),
or removed, as well as those which tell us that the
currently focussed activity has changed.
The HomeModel tracks a set of HomeActivity instances,
which are tracking the window to activity mappings
the activity factories have set up.
"""
__gsignals__ = {
'activity-added': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'activity-started': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'activity-removed': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'active-activity-changed': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'pending-activity-changed': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT]))
}
def __init__(self):
gobject.GObject.__init__(self)
self._activities = []
self._active_activity = None
self._pending_activity = None
screen = wnck.screen_get_default()
screen.connect('window-opened', self._window_opened_cb)
screen.connect('window-closed', self._window_closed_cb)
screen.connect('active-window-changed',
self._active_window_changed_cb)
def _get_activities_with_window(self):
ret = []
for i in self._activities:
if i.get_window() is not None:
ret.append(i)
return ret
def get_previous_activity(self):
activities = self._get_activities_with_window()
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i = activities.index(self._pending_activity)
if len(activities) == 0:
return None
elif i - 1 >= 0:
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return activities[i - 1]
else:
return activities[len(activities) - 1]
def get_next_activity(self):
activities = self._get_activities_with_window()
i = activities.index(self._pending_activity)
if len(activities) == 0:
return None
elif i + 1 < len(activities):
return activities[i + 1]
else:
return activities[0]
def get_pending_activity(self):
"""Returns the activity that would be seen in the Activity zoom level
In the Home (or Neighborhood or Groups) zoom level, this
indicates the activity that would become active if the user
switched to the Activity zoom level. (In the Activity zoom
level, this just returns the currently-active activity.)
Unlike get_active_activity(), this never returns None as long
as there is any activity running.
"""
return self._pending_activity
def _set_pending_activity(self, home_activity):
if self._pending_activity == home_activity:
return
self._pending_activity = home_activity
self.emit('pending-activity-changed', self._pending_activity)
def get_active_activity(self):
"""Returns the activity that the user is currently working in
In the Activity zoom level, this returns the currently-active
activity. In the other zoom levels, it returns the activity
that was most-recently active in the Activity zoom level, or
None if the most-recently-active activity is no longer
running.
"""
return self._active_activity
def _set_active_activity(self, home_activity):
if self._active_activity == home_activity:
return
if self._active_activity:
service = self._active_activity.get_service()
if service:
service.SetActive(False,
reply_handler=self._set_active_success,
error_handler=self._set_active_error)
if home_activity:
service = home_activity.get_service()
if service:
service.SetActive(True,
reply_handler=self._set_active_success,
error_handler=self._set_active_error)
self._active_activity = home_activity
self.emit('active-activity-changed', self._active_activity)
def __iter__(self):
return iter(self._activities)
def __len__(self):
return len(self._activities)
def __getitem__(self, i):
return self._activities[i]
def index(self, obj):
return self._activities.index(obj)
def _window_opened_cb(self, screen, window):
if window.get_window_type() == wnck.WINDOW_NORMAL:
home_activity = None
activity_id = wm.get_activity_id(window)
service_name = wm.get_bundle_id(window)
if service_name:
registry = activity.get_registry()
activity_info = registry.get_activity(service_name)
else:
activity_info = None
if activity_id:
home_activity = self._get_activity_by_id(activity_id)
if not home_activity:
home_activity = HomeActivity(activity_info, activity_id)
self._add_activity(home_activity)
home_activity.set_window(window)
home_activity.props.launching = False
self.emit('activity-started', home_activity)
if self._pending_activity is None:
self._set_pending_activity(home_activity)
def _window_closed_cb(self, screen, window):
if window.get_window_type() == wnck.WINDOW_NORMAL:
self._remove_activity_by_xid(window.get_xid())
def _get_activity_by_xid(self, xid):
for home_activity in self._activities:
if home_activity.get_xid() == xid:
return home_activity
return None
def _get_activity_by_id(self, activity_id):
for home_activity in self._activities:
if home_activity.get_activity_id() == activity_id:
return home_activity
return None
def _set_active_success(self):
pass
def _set_active_error(self, err):
logging.error("set_active() failed: %s" % err)
def _active_window_changed_cb(self, screen, previous_window=None):
window = screen.get_active_window()
if window is None:
return
if window.get_window_type() != wnck.WINDOW_DIALOG:
while window.get_transient() is not None:
window = window.get_transient()
activity = self._get_activity_by_xid(window.get_xid())
if activity is not None:
self._set_pending_activity(activity)
self._set_active_activity(activity)
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def _add_activity(self, home_activity):
self._activities.append(home_activity)
self.emit('activity-added', home_activity)
def _remove_activity(self, home_activity):
if home_activity == self._active_activity:
self._set_active_activity(None)
if home_activity == self._pending_activity:
# Figure out the new _pending_activity
windows = wnck.screen_get_default().get_windows_stacked()
windows.reverse()
for window in windows:
new_activity = self._get_activity_by_xid(window.get_xid())
if new_activity is not None:
self._set_pending_activity(new_activity)
break
else:
logging.error('No activities are running')
self._set_pending_activity(None)
self.emit('activity-removed', home_activity)
self._activities.remove(home_activity)
def _remove_activity_by_xid(self, xid):
home_activity = self._get_activity_by_xid(xid)
if home_activity:
self._remove_activity(home_activity)
else:
logging.error('Model for window %d does not exist.' % xid)
def notify_activity_launch(self, activity_id, service_name):
registry = activity.get_registry()
activity_info = registry.get_activity(service_name)
if not activity_info:
raise ValueError("Activity service name '%s' was not found in the bundle registry." % service_name)
home_activity = HomeActivity(activity_info, activity_id)
home_activity.props.launching = True
self._add_activity(home_activity)
# FIXME: better learn about finishing processes by receiving a signal.
# Now just check whether an activity has a window after ~90sec
gobject.timeout_add(90000, self._check_activity_launched, activity_id)
def notify_activity_launch_failed(self, activity_id):
home_activity = self._get_activity_by_id(activity_id)
if home_activity:
logging.debug("Activity %s (%s) launch failed" % (activity_id, home_activity.get_type()))
self._remove_activity(home_activity)
else:
logging.error('Model for activity id %s does not exist.' % activity_id)
def _check_activity_launched(self, activity_id):
home_activity = self._get_activity_by_id(activity_id)
if home_activity and home_activity.props.launching:
logging.debug('Activity %s still launching, assuming it failed...', activity_id)
self.notify_activity_launch_failed(activity_id)
return False