634 lines
22 KiB
Python
634 lines
22 KiB
Python
"""Base class for Python-coded activities
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This is currently the only reference for what an
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activity must do to participate in the Sugar desktop.
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"""
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# Copyright (C) 2006-2007 Red Hat, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library 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 GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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from gettext import gettext as _
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import logging
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import os
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import time
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import tempfile
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from hashlib import sha1
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import gtk, gobject
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import dbus
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import json
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from sugar import util
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from sugar.presence import presenceservice
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from sugar.activity.activityservice import ActivityService
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from sugar.graphics import style
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from sugar.graphics.window import Window
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from sugar.graphics.toolbox import Toolbox
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from sugar.graphics.toolbutton import ToolButton
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from sugar.graphics.toolcombobox import ToolComboBox
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from sugar.datastore import datastore
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from sugar import wm
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from sugar import profile
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from sugar import _sugarbaseext
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SCOPE_PRIVATE = "private"
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SCOPE_INVITE_ONLY = "invite" # shouldn't be shown in UI, it's implicit when you invite somebody
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SCOPE_NEIGHBORHOOD = "public"
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class ActivityToolbar(gtk.Toolbar):
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def __init__(self, activity):
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gtk.Toolbar.__init__(self)
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self._activity = activity
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self._updating_share = False
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activity.connect('shared', self._activity_shared_cb)
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activity.connect('joined', self._activity_shared_cb)
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activity.connect('notify::max_participants',
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self._max_participants_changed_cb)
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if activity.metadata:
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self.title = gtk.Entry()
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self.title.set_size_request(int(gtk.gdk.screen_width() / 6), -1)
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self.title.set_text(activity.metadata['title'])
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self.title.connect('changed', self._title_changed_cb)
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self._add_widget(self.title)
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activity.metadata.connect('updated', self._jobject_updated_cb)
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separator = gtk.SeparatorToolItem()
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separator.props.draw = False
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separator.set_expand(True);
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self.insert(separator, -1)
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separator.show()
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self.share = ToolComboBox(label_text=_('Share with:'))
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self.share.combo.connect('changed', self._share_changed_cb)
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self.share.combo.append_item(SCOPE_PRIVATE, _('Private'),
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'zoom-home-mini')
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self.share.combo.append_item(SCOPE_NEIGHBORHOOD, _('My Neighborhood'),
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'zoom-neighborhood-mini')
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self.insert(self.share, -1)
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self.share.show()
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self._update_share()
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self.keep = ToolButton('document-save')
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self.keep.set_tooltip(_('Keep'))
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self.keep.connect('clicked', self._keep_clicked_cb)
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self.insert(self.keep, -1)
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self.keep.show()
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self.stop = ToolButton('activity-stop')
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self.stop.set_tooltip(_('Stop'))
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self.stop.connect('clicked', self._stop_clicked_cb)
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self.insert(self.stop, -1)
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self.stop.show()
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self._update_title_sid = None
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def _update_share(self):
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self._updating_share = True
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if self._activity.props.max_participants == 1:
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self.share.hide()
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if self._activity.get_shared():
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self.share.set_sensitive(False)
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self.share.combo.set_active(1)
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else:
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self.share.set_sensitive(True)
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self.share.combo.set_active(0)
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self._updating_share = False
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def _share_changed_cb(self, combo):
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if self._updating_share:
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return
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model = self.share.combo.get_model()
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it = self.share.combo.get_active_iter()
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(scope, ) = model.get(it, 0)
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if scope == SCOPE_NEIGHBORHOOD:
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self._activity.share()
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def _keep_clicked_cb(self, button):
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self._activity.copy()
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def _stop_clicked_cb(self, button):
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self._activity.close()
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def _jobject_updated_cb(self, jobject):
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self.title.set_text(jobject['title'])
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def _title_changed_cb(self, entry):
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if not self._update_title_sid:
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self._update_title_sid = gobject.timeout_add(1000, self._update_title_cb)
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def _update_title_cb(self):
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title = self.title.get_text()
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self._activity.metadata['title'] = title
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self._activity.metadata['title_set_by_user'] = '1'
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self._activity.save()
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shared_activity = self._activity._shared_activity
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if shared_activity:
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shared_activity.props.name = title
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self._update_title_sid = None
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return False
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def _add_widget(self, widget, expand=False):
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tool_item = gtk.ToolItem()
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tool_item.set_expand(expand)
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tool_item.add(widget)
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widget.show()
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self.insert(tool_item, -1)
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tool_item.show()
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def _activity_shared_cb(self, activity):
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self._update_share()
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def _max_participants_changed_cb(self, activity, pspec):
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self._update_share()
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class EditToolbar(gtk.Toolbar):
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def __init__(self):
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gtk.Toolbar.__init__(self)
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self.undo = ToolButton('edit-undo')
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self.undo.set_tooltip(_('Undo'))
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self.insert(self.undo, -1)
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self.undo.show()
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self.redo = ToolButton('edit-redo')
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self.redo.set_tooltip(_('Redo'))
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self.insert(self.redo, -1)
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self.redo.show()
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self.separator = gtk.SeparatorToolItem()
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self.separator.set_draw(True)
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self.insert(self.separator, -1)
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self.separator.show()
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self.copy = ToolButton('edit-copy')
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self.copy.set_tooltip(_('Copy'))
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self.insert(self.copy, -1)
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self.copy.show()
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self.paste = ToolButton('edit-paste')
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self.paste.set_tooltip(_('Paste'))
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self.insert(self.paste, -1)
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self.paste.show()
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class ActivityToolbox(Toolbox):
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def __init__(self, activity):
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Toolbox.__init__(self)
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self._activity_toolbar = ActivityToolbar(activity)
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self.add_toolbar('Activity', self._activity_toolbar)
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self._activity_toolbar.show()
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def get_activity_toolbar(self):
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return self._activity_toolbar
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class Activity(Window, gtk.Container):
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"""Base Activity class that all other Activities derive from."""
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__gtype_name__ = 'SugarActivity'
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__gsignals__ = {
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'shared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([])),
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'joined': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([]))
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}
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__gproperties__ = {
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'active' : (bool, None, None, False,
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gobject.PARAM_READWRITE),
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'max-participants': (int, None, None, 0, 1000, 0,
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gobject.PARAM_READWRITE)
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}
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def __init__(self, handle, create_jobject=True):
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"""Initialise the Activity
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handle -- sugar.activity.activityhandle.ActivityHandle
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instance providing the activity id and access to the
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presence service which *may* provide sharing for this
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application
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create_jobject -- boolean
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define if it should create a journal object if we are
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not resuming
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Side effects:
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Sets the gdk screen DPI setting (resolution) to the
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Sugar screen resolution.
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Connects our "destroy" message to our _destroy_cb
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method.
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Creates a base gtk.Window within this window.
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Creates an ActivityService (self._bus) servicing
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this application.
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"""
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Window.__init__(self)
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# process titles will only show 15 characters
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# but they get truncated anyway so if more characters
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# are supported in the future we will get a better view
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# of the processes
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proc_title = "%s <%s>" % (get_bundle_name(), handle.activity_id)
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util.set_proc_title(proc_title)
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self.connect('realize', self._realize_cb)
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self.connect('delete-event', self.__delete_event_cb)
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self._active = False
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self._activity_id = handle.activity_id
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self._pservice = presenceservice.get_instance()
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self._shared_activity = None
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self._share_id = None
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self._join_id = None
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self._preview = None
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self._updating_jobject = False
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self._closing = False
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self._deleting = False
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self._max_participants = 0
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self._invites_queue = []
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self._bus = ActivityService(self)
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self._owns_file = False
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share_scope = SCOPE_PRIVATE
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if handle.object_id:
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self._jobject = datastore.get(handle.object_id)
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# TODO: Don't create so many objects until we have versioning
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# support in the datastore
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#self._jobject.object_id = ''
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#del self._jobject.metadata['ctime']
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del self._jobject.metadata['mtime']
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self.set_title(self._jobject.metadata['title'])
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if self._jobject.metadata.has_key('share-scope'):
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share_scope = self._jobject.metadata['share-scope']
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elif create_jobject:
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logging.debug('Creating a jobject.')
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self._jobject = datastore.create()
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self._jobject.metadata['title'] = _('%s Activity') % get_bundle_name()
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self.set_title(self._jobject.metadata['title'])
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self._jobject.metadata['title_set_by_user'] = '0'
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self._jobject.metadata['activity'] = self.get_bundle_id()
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self._jobject.metadata['activity_id'] = self.get_id()
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self._jobject.metadata['keep'] = '0'
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self._jobject.metadata['preview'] = ''
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self._jobject.metadata['share-scope'] = SCOPE_PRIVATE
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if self._shared_activity is not None:
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icon_color = self._shared_activity.props.color
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else:
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icon_color = profile.get_color().to_string()
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self._jobject.metadata['icon-color'] = icon_color
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self._jobject.file_path = ''
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datastore.write(self._jobject,
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reply_handler=self._internal_jobject_create_cb,
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error_handler=self._internal_jobject_error_cb)
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else:
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self._jobject = None
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# handle activity share/join
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mesh_instance = self._pservice.get_activity(self._activity_id)
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logging.debug("*** Act %s, mesh instance %r, scope %s" % (self._activity_id, mesh_instance, share_scope))
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if mesh_instance:
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# There's already an instance on the mesh, join it
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logging.debug("*** Act %s joining existing mesh instance" % self._activity_id)
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self._shared_activity = mesh_instance
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self._shared_activity.connect('notify::private',
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self._privacy_changed_cb)
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self._join_id = self._shared_activity.connect("joined", self._internal_joined_cb)
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if not self._shared_activity.props.joined:
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self._shared_activity.join()
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else:
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self._internal_joined_cb(self._shared_activity, True, None)
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elif share_scope != SCOPE_PRIVATE:
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logging.debug("*** Act %s no existing mesh instance, but used to be shared, will share" % self._activity_id)
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# no existing mesh instance, but activity used to be shared, so
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# restart the share
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if share_scope == SCOPE_INVITE_ONLY:
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self.share(private=True)
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elif share_scope == SCOPE_NEIGHBORHOOD:
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self.share(private=False)
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else:
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logging.debug("Unknown share scope %r" % share_scope)
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def do_set_property(self, pspec, value):
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if pspec.name == 'active':
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if self._active != value:
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self._active = value
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if not self._active and self._jobject:
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self.save()
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elif pspec.name == 'max-participants':
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self._max_participants = value
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def do_get_property(self, pspec):
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if pspec.name == 'active':
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return self._active
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elif pspec.name == 'max-participants':
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return self._max_participants
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def get_id(self):
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return self._activity_id
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def get_bundle_id(self):
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return os.environ['SUGAR_BUNDLE_ID']
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def set_canvas(self, canvas):
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Window.set_canvas(self, canvas)
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canvas.connect('map', self._canvas_map_cb)
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def _canvas_map_cb(self, canvas):
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if self._jobject and self._jobject.file_path:
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self.read_file(self._jobject.file_path)
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def _internal_jobject_create_cb(self):
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pass
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def _internal_jobject_error_cb(self, err):
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logging.debug("Error creating activity datastore object: %s" % err)
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def get_activity_root(self):
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"""
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Return the appropriate location in the fs where to store activity related
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data that doesn't pertain to the current execution of the activity and
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thus cannot go into the DataStore.
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"""
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if os.environ.has_key('SUGAR_ACTIVITY_ROOT') and \
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os.environ['SUGAR_ACTIVITY_ROOT']:
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return os.environ['SUGAR_ACTIVITY_ROOT']
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else:
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return '/'
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def read_file(self, file_path):
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"""
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Subclasses implement this method if they support resuming objects from
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the journal. 'file_path' is the file to read from.
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"""
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raise NotImplementedError
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def write_file(self, file_path):
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"""
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Subclasses implement this method if they support saving data to objects
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in the journal. 'file_path' is the file to write to.
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"""
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raise NotImplementedError
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def _internal_save_cb(self):
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logging.debug('Activity._internal_save_cb')
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self._updating_jobject = False
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if self._closing:
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self._cleanup_jobject()
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self.destroy()
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def _internal_save_error_cb(self, err):
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logging.debug('Activity._internal_save_error_cb')
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self._updating_jobject = False
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if self._closing:
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self._cleanup_jobject()
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self.destroy()
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logging.debug("Error saving activity object to datastore: %s" % err)
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def _cleanup_jobject(self):
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if self._jobject:
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if self._owns_file and os.path.isfile(self._jobject.file_path):
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logging.debug('_cleanup_jobject: removing %r' % self._jobject.file_path)
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os.remove(self._jobject.file_path)
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self._owns_file = False
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self._jobject.destroy()
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self._jobject = None
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def _get_preview(self):
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preview_pixbuf = self.get_canvas_screenshot()
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if preview_pixbuf is None:
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return None
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preview_pixbuf = preview_pixbuf.scale_simple(style.zoom(300),
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style.zoom(225),
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gtk.gdk.INTERP_BILINEAR)
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# TODO: Find a way of taking a png out of the pixbuf without saving to a temp file.
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# Impementing gtk.gdk.Pixbuf.save_to_buffer in pygtk would solve this.
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fd, file_path = tempfile.mkstemp('.png')
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del fd
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preview_pixbuf.save(file_path, 'png')
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f = open(file_path)
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try:
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preview_data = f.read()
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finally:
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f.close()
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os.remove(file_path)
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return preview_data
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def _get_buddies(self):
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if self._shared_activity is not None:
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buddies = {}
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for buddy in self._shared_activity.get_joined_buddies():
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if not buddy.props.owner:
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buddy_id = sha1(buddy.props.key).hexdigest()
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buddies[buddy_id] = [buddy.props.nick, buddy.props.color]
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return buddies
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else:
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return {}
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def save(self):
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"""Request that the activity is saved to the Journal."""
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logging.debug('Activity.save: %r' % self._jobject.object_id)
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if self._updating_jobject:
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logging.info('Activity.save: still processing a previous request.')
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return
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buddies_dict = self._get_buddies()
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if buddies_dict:
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self.metadata['buddies_id'] = json.write(buddies_dict.keys())
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self.metadata['buddies'] = json.write(self._get_buddies())
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if self._preview is None:
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self.metadata['preview'] = ''
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else:
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self.metadata['preview'] = dbus.ByteArray(self._preview)
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try:
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if self._jobject.file_path:
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self.write_file(self._jobject.file_path)
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else:
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file_path = os.path.join(tempfile.gettempdir(), '%i' % time.time())
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self.write_file(file_path)
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self._owns_file = True
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self._jobject.file_path = file_path
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except NotImplementedError:
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pass
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# Cannot call datastore.write async for creates: https://dev.laptop.org/ticket/3071
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if self._jobject.object_id is None:
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datastore.write(self._jobject, transfer_ownership=True)
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else:
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self._updating_jobject = True
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datastore.write(self._jobject,
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transfer_ownership=True,
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reply_handler=self._internal_save_cb,
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error_handler=self._internal_save_error_cb)
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def copy(self):
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logging.debug('Activity.copy: %r' % self._jobject.object_id)
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self._preview = self._get_preview()
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self.save()
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self._jobject.object_id = None
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def _privacy_changed_cb(self, shared_activity, param_spec):
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if shared_activity.props.private:
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|
self._jobject.metadata['share-scope'] = SCOPE_INVITE_ONLY
|
|
else:
|
|
self._jobject.metadata['share-scope'] = SCOPE_NEIGHBORHOOD
|
|
|
|
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')
|
|
self._privacy_changed_cb(self._shared_activity, None)
|
|
|
|
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)
|
|
|
|
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):
|
|
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.
|
|
"""
|
|
# FIXME: Make private=True to turn on the by-invitation-only scope
|
|
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._internal_share_cb)
|
|
self._pservice.share_activity(self, private=private)
|
|
|
|
def close(self):
|
|
self._preview = self._get_preview()
|
|
|
|
self.save()
|
|
|
|
if self._shared_activity:
|
|
self._shared_activity.leave()
|
|
|
|
if self._updating_jobject:
|
|
self._closing = True
|
|
else:
|
|
self.destroy()
|
|
|
|
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):
|
|
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']
|
|
|