sugar-activity: import and make independent of sugar-toolkit GTK versions

As we move to adding support for a second UI toolkit (GTK+ 3.x),
the sugar-activity binary used by all activities must become
backend-toolkit-independent. It would be wasteful to have two backend
toolkits loaded in memory, and in the GTK2/GTK3 case, it is impossible
(importing both results in an instant crash).

To achieve this, we split the existing sugar-toolkit activity/main.py:main()
functionality into two parts, moving it into the sugar-activity binary and
the Activity class as follows:
 1. All toolkit-specific stuff is moved into the Activity class (i.e.
   everything that interacts with GTK)
 2. Everything that can be reasonably/easily moved into the Activity class
   is also moved.
 3. What remains is the stuff that is inherently involved with the
   construction of the Activity object, not related to UI toolkits. This
   is moved into the sugar-activity binary.

main.py is then removed from sugar-toolkit, and sugar-activity is moved
from sugar to sugar-toolkit-gtk3 in order to keep toolkit-related code
with the toolkit itself.

With this work done, the one remaining question is how to invoke the main
loop. An optional run_main_loop() method is added to the activity class,
for GTK2 this will run the GTK2 main loop, for GTK3 the GTK3 main loop will
be run, etc.

Signed-off-by: Daniel Drake <dsd@laptop.org>

Makefile.am

@@ -11,4 +11,4 @@ EXTRA_DIST =                    \
 	intltool-update.in      \
 	intltool-extract.in
 
-SUBDIRS = src po
+SUBDIRS = bin src po

bin/Makefile.am

@@ -0,0 +1 @@
+dist_bin_SCRIPTS = sugar-activity

bin/sugar-activity

@@ -1,41 +1,40 @@
-# Copyright (C) 2008 Red Hat, Inc.
+#!/usr/bin/env python
+
+# Copyright (C) 2006-2008, Red Hat, Inc.
 #
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2 of the License, or (at your option) any later version.
+# This 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 library is distributed in the hope that it will be useful,
+# 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
-# Lesser General Public License for more details.
+# 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 Lesser General Public
-# License along with this library; if not, write to the
-# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-# Boston, MA 02111-1307, USA.
+# 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 os
 import sys
 import gettext
 from optparse import OptionParser
 
-import gtk
 import dbus
 import dbus.service
 import dbus.glib
 
 import sugar
-from sugar3.activity import activityhandle
-from sugar3.activity import i18n
-from sugar3.bundle.activitybundle import ActivityBundle
-from sugar3.graphics import style
+from sugar.activity import activityhandle
+from sugar.bundle.activitybundle import ActivityBundle
 from sugar import logger
 
 
 def create_activity_instance(constructor, handle):
     activity = constructor(handle)
     activity.show()
+    return activity
 
 
 def get_single_process_name(bundle_id):
@@ -61,7 +60,6 @@ class SingleProcess(dbus.service.Object):
         handle = activityhandle.create_from_dict(handle_dict)
         create_activity_instance(self.constructor, handle)
 
-
 def main():
     parser = OptionParser()
     parser.add_option('-b', '--bundle-id', dest='bundle_id',
@@ -100,20 +98,6 @@ def main():
     os.environ['SUGAR_BUNDLE_NAME'] = bundle.get_name()
     os.environ['SUGAR_BUNDLE_VERSION'] = str(bundle.get_activity_version())
 
-    gtk.icon_theme_get_default().append_search_path(bundle.get_icons_path())
-
-    # This code can be removed when we grow an xsettings daemon (the GTK+
-    # init routines will then automatically figure out the font settings)
-    settings = gtk.settings_get_default()
-    settings.set_property('gtk-font-name',
-                          '%s %f' % (style.FONT_FACE, style.FONT_SIZE))
-
-    locale_path = i18n.get_locale_path(bundle.get_bundle_id())
-
-    gettext.bindtextdomain(bundle.get_bundle_id(), locale_path)
-    gettext.bindtextdomain('sugar-toolkit', sugar3.locale_path)
-    gettext.textdomain(bundle.get_bundle_id())
-
     splitted_module = args[0].rsplit('.', 1)
     module_name = splitted_module[0]
     class_name = splitted_module[1]
@@ -155,6 +139,9 @@ def main():
     if hasattr(module, 'start'):
         module.start()
 
-    create_activity_instance(activity_constructor, activity_handle)
+    instance = create_activity_instance(activity_constructor, activity_handle)
+
+    if hasattr(instance, 'run_main_loop'):
+        instance.run_main_loop()
 
-    gtk.main()
+main()

configure.ac

@@ -39,6 +39,7 @@ GOBJECT_INTROSPECTION_CHECK([1.30.0])
 
 AC_OUTPUT([
 Makefile
+bin/Makefile
 src/Makefile
 src/sugar3/Makefile
 src/sugar3/activity/Makefile

src/sugar3/activity/Makefile.am

@@ -7,6 +7,5 @@ sugar_PYTHON =              \
 	activityservice.py      \
 	bundlebuilder.py        \
 	i18n.py			\
-	main.py                 \
 	namingalert.py          \
 	widgets.py

src/sugar3/activity/activity.py

@@ -71,8 +71,10 @@ from telepathy.interfaces import CHANNEL, \
 from telepathy.constants import CONNECTION_HANDLE_TYPE_CONTACT
 from telepathy.constants import CONNECTION_HANDLE_TYPE_ROOM
 
+import sugar3
 from sugar3 import util
 from sugar3.presence import presenceservice
+from sugar3.activity import i18n
 from sugar3.activity.activityservice import ActivityService
 from sugar3.activity.namingalert import NamingAlert
 from sugar3.graphics import style
@@ -259,6 +261,22 @@ class Activity(Window, Gtk.Container):
             the base class __init()__ before doing Activity specific things.
 
         """
+        # Stuff that needs to be done early
+
+        locale_path = i18n.get_locale_path(self.get_bundle_id())
+        gettext.bindtextdomain(self.get_bundle_id(), locale_path)
+        gettext.bindtextdomain('sugar-toolkit', sugar3.locale_path)
+        gettext.textdomain(self.get_bundle_id())
+
+        icons_path = os.path.join(get_bundle_path(), 'icons')
+        Gtk.IconTheme.get_default().append_search_path(icons_path)
+
+        # This code can be removed when we grow an xsettings daemon (the GTK+
+        # init routines will then automatically figure out the font settings)
+        settings = Gtk.Settings.get_default()
+        settings.set_property('gtk-font-name',
+                              '%s %f' % (style.FONT_FACE, style.FONT_SIZE))
+
         Window.__init__(self)
 
         if 'SUGAR_ACTIVITY_ROOT' in os.environ:
@@ -349,6 +367,9 @@ class Activity(Window, Gtk.Container):
                                            self.__jobject_updated_cb)
         self.set_title(self._jobject.metadata['title'])
 
+    def run_main_loop(self):
+        Gtk.main()
+
     def _initialize_journal_object(self):
         title = _('%s Activity') % get_bundle_name()
         client = GConf.Client.get_default()