246 lines
9.3 KiB
Python
246 lines
9.3 KiB
Python
# Copyright (C) 2006-2007 Owen Williams.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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import logging
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import gobject
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import wnck
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import dbus
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from sugar import wm
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from sugar import activity
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from model.homeactivity import HomeActivity
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class HomeModel(gobject.GObject):
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"""Model of the "Home" view (activity management)
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The HomeModel is basically the point of registration
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for all running activities within Sugar. It traps
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events that tell the system there is a new activity
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being created (generated by the activity factories),
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or removed, as well as those which tell us that the
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currently focussed activity has changed.
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The HomeModel tracks a set of HomeActivity instances,
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which are tracking the window to activity mappings
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the activity factories have set up.
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"""
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__gsignals__ = {
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'activity-added': (gobject.SIGNAL_RUN_FIRST,
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gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'activity-started': (gobject.SIGNAL_RUN_FIRST,
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gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'activity-removed': (gobject.SIGNAL_RUN_FIRST,
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gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'active-activity-changed': (gobject.SIGNAL_RUN_FIRST,
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gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'pending-activity-changed': (gobject.SIGNAL_RUN_FIRST,
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gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT]))
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}
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def __init__(self):
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gobject.GObject.__init__(self)
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self._activities = []
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self._active_activity = None
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self._pending_activity = None
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screen = wnck.screen_get_default()
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screen.connect('window-opened', self._window_opened_cb)
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screen.connect('window-closed', self._window_closed_cb)
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screen.connect('active-window-changed',
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self._active_window_changed_cb)
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def get_pending_activity(self):
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"""Returns the activity that would be seen in the Activity zoom level
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In the Home (or Neighborhood or Groups) zoom level, this
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indicates the activity that would become active if the user
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switched to the Activity zoom level. (In the Activity zoom
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level, this just returns the currently-active activity.)
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Unlike get_active_activity(), this never returns None as long
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as there is any activity running.
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"""
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return self._pending_activity
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def _set_pending_activity(self, home_activity):
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if self._pending_activity == home_activity:
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return
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self._pending_activity = home_activity
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self.emit('pending-activity-changed', self._pending_activity)
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def get_active_activity(self):
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"""Returns the activity that the user is currently working in
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In the Activity zoom level, this returns the currently-active
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activity. In the other zoom levels, it returns the activity
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that was most-recently active in the Activity zoom level, or
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None if the most-recently-active activity is no longer
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running.
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"""
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return self._active_activity
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def _set_active_activity(self, home_activity):
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if self._active_activity == home_activity:
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return
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if self._active_activity:
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service = self._active_activity.get_service()
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if service:
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service.SetActive(False,
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reply_handler=self._set_active_success,
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error_handler=self._set_active_error)
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if home_activity:
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service = home_activity.get_service()
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if service:
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service.SetActive(True,
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reply_handler=self._set_active_success,
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error_handler=self._set_active_error)
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self._active_activity = home_activity
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self.emit('active-activity-changed', self._active_activity)
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def __iter__(self):
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return iter(self._activities)
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def __len__(self):
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return len(self._activities)
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def __getitem__(self, i):
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return self._activities[i]
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def index(self, obj):
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return self._activities.index(obj)
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def _window_opened_cb(self, screen, window):
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if window.get_window_type() == wnck.WINDOW_NORMAL:
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home_activity = None
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activity_id = wm.get_activity_id(window)
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service_name = wm.get_bundle_id(window)
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if service_name:
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registry = activity.get_registry()
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activity_info = registry.get_activity(service_name)
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else:
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activity_info = None
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if activity_id:
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home_activity = self._get_activity_by_id(activity_id)
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if not home_activity:
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home_activity = HomeActivity(activity_info, activity_id)
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self._add_activity(home_activity)
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home_activity.set_window(window)
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home_activity.props.launching = False
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self.emit('activity-started', home_activity)
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if self._pending_activity is None:
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self._set_pending_activity(home_activity)
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def _window_closed_cb(self, screen, window):
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if window.get_window_type() == wnck.WINDOW_NORMAL:
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self._remove_activity_by_xid(window.get_xid())
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def _get_activity_by_xid(self, xid):
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for home_activity in self._activities:
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if home_activity.get_xid() == xid:
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return home_activity
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return None
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def _get_activity_by_id(self, activity_id):
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for home_activity in self._activities:
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if home_activity.get_activity_id() == activity_id:
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return home_activity
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return None
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def _set_active_success(self):
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pass
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def _set_active_error(self, err):
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logging.error("set_active() failed: %s" % err)
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def _active_window_changed_cb(self, screen, previous_window=None):
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window = screen.get_active_window()
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if window is None:
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return
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if window.get_window_type() != wnck.WINDOW_DIALOG:
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while window.get_transient() is not None:
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window = window.get_transient()
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activity = self._get_activity_by_xid(window.get_xid())
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if activity is not None:
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self._set_pending_activity(activity)
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self._set_active_activity(activity)
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def _add_activity(self, home_activity):
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self._activities.append(home_activity)
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self.emit('activity-added', home_activity)
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def _remove_activity(self, home_activity):
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if home_activity == self._active_activity:
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self._set_active_activity(None)
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if home_activity == self._pending_activity:
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# Figure out the new _pending_activity
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windows = wnck.screen_get_default().get_windows_stacked()
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windows.reverse()
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for window in windows:
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new_activity = self._get_activity_by_xid(window.get_xid())
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if new_activity is not None:
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self._set_pending_activity(new_activity)
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break
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else:
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logging.error('No activities are running')
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self._set_pending_activity(None)
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self.emit('activity-removed', home_activity)
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self._activities.remove(home_activity)
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def _remove_activity_by_xid(self, xid):
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home_activity = self._get_activity_by_xid(xid)
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if home_activity:
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self._remove_activity(home_activity)
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else:
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logging.error('Model for window %d does not exist.' % xid)
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def notify_activity_launch(self, activity_id, service_name):
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registry = activity.get_registry()
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activity_info = registry.get_activity(service_name)
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if not activity_info:
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raise ValueError("Activity service name '%s' was not found in the bundle registry." % service_name)
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home_activity = HomeActivity(activity_info, activity_id)
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home_activity.props.launching = True
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self._add_activity(home_activity)
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def notify_activity_launch_failed(self, activity_id):
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home_activity = self._get_activity_by_id(activity_id)
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if home_activity:
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logging.debug("Activity %s (%s) launch failed" % (activity_id, home_activity.get_type()))
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self._remove_activity(home_activity)
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else:
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logging.error('Model for activity id %s does not exist.' % activity_id)
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