386 lines
13 KiB
Python
386 lines
13 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, 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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import gtk, gobject
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import dbus
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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 units
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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.datastore import datastore
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from sugar import wm
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from sugar import profile
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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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activity.connect('shared', self._activity_shared_cb)
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activity.connect('joined', self._activity_shared_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('focus-out-event', self._title_focus_out_event_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 = ToolButton('stock-share-mesh')
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self.share.connect('clicked', self._share_clicked_cb)
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self.insert(self.share, -1)
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if activity.get_shared():
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self.share.set_sensitive(False)
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self.share.show()
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separator = gtk.SeparatorToolItem()
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separator.props.draw = False
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self.insert(separator, -1)
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separator.show()
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self.close = ToolButton('window-close')
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self.close.connect('clicked', self._close_clicked_cb)
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self.insert(self.close, -1)
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self.close.show()
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def _share_clicked_cb(self, button):
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self._activity.share()
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def _close_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_focus_out_event_cb(self, entry, event):
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if self._activity.metadata['title'] != self.title.get_text():
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self._activity.metadata['title'] = self.title.get_text()
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self._activity.save()
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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.share.set_sensitive(False)
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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.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.insert(self.redo, -1)
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self.redo.show()
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separator = gtk.SeparatorToolItem()
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separator.set_draw(True)
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self.insert(separator, -1)
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separator.show()
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self.copy = ToolButton('edit-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.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, 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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self.connect('destroy', self._destroy_cb)
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self.connect('realize', self._realize_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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shared_activity = handle.get_shared_activity()
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if shared_activity:
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# Join an existing instance of this activity on the network
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self._shared_activity = shared_activity
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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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self._bus = ActivityService(self)
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if handle.object_id:
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self._jobject = datastore.get(handle.object_id)
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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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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._jobject.metadata['activity'] = self.get_service_name()
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self._jobject.metadata['keep'] = '0'
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self._jobject.metadata['buddies'] = ''
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self._jobject.metadata['preview'] = ''
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self._jobject.metadata['icon-color'] = profile.get_color().to_string()
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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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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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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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def get_id(self):
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return self._activity_id
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def get_service_name(self):
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return os.environ['SUGAR_BUNDLE_SERVICE_NAME']
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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 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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pass
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def _internal_save_error_cb(self, err):
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logging.debug("Error saving activity object to datastore: %s" % err)
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def save(self):
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"""Request that the activity is saved to the Journal."""
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preview_pixbuf = self.get_canvas_screenshot()
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preview_pixbuf = preview_pixbuf.scale_simple(units.grid_to_pixels(4),
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units.grid_to_pixels(3),
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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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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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# TODO: Take this out when the datastore accepts binary data.
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import base64
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self.metadata['preview'] = base64.b64encode(preview_data)
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try:
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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._jobject.file_path = file_path
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except NotImplementedError:
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pass
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datastore.write(self._jobject,
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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 _internal_joined_cb(self, activity, success, err):
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"""Callback when join has finished"""
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self._shared_activity.disconnect(self._join_id)
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self._join_id = None
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if not success:
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logging.debug("Failed to join activity: %s" % err)
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return
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self.present()
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self.emit('joined')
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def get_shared(self):
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"""Returns TRUE if the activity is shared on the mesh."""
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if not self._shared_activity:
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return False
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return self._shared_activity.props.joined
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def _internal_share_cb(self, ps, success, activity, err):
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self._pservice.disconnect(self._share_id)
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self._share_id = None
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if not success:
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logging.debug('Share of activity %s failed: %s.' % (self._activity_id, err))
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return
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logging.debug('Share of activity %s successful.' % self._activity_id)
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self._shared_activity = activity
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self.emit('shared')
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def share(self):
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"""Request that the activity be shared on the network."""
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if self._shared_activity and self._shared_activity.props.joined:
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raise RuntimeError("Activity %s already shared." % self._activity_id)
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logging.debug('Requesting share of activity %s.' % self._activity_id)
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self._share_id = self._pservice.connect("activity-shared", self._internal_share_cb)
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self._pservice.share_activity(self)
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def execute(self, command, args):
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"""Execute the given command with args"""
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return False
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def _realize_cb(self, window):
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wm.set_bundle_id(window.window, self.get_service_name())
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wm.set_activity_id(window.window, self._activity_id)
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def _destroy_cb(self, window):
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"""Destroys our ActivityService and sharing service"""
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if self._bus:
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del self._bus
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self._bus = None
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if self._shared_activity:
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self._shared_activity.leave()
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def close(self):
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if self._jobject:
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try:
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self.save()
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except:
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self.destroy()
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raise
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self.destroy()
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def get_metadata(self):
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if self._jobject:
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return self._jobject.metadata
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else:
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return None
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metadata = property(get_metadata, None)
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def get_bundle_name():
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"""Return the bundle name for the current process' bundle
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"""
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return os.environ['SUGAR_BUNDLE_NAME']
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def get_bundle_path():
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"""Return the bundle path for the current process' bundle
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"""
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return os.environ['SUGAR_BUNDLE_PATH']
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