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# Copyright (C) 2008, Benjamin Berg <benjamin@sipsolutions.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import logging
import time
import gobject
import gtk
from jarabe.model import shell
_RAISE_DELAY = 250
class TabbingHandler(object):
def __init__(self, frame, modifier):
self._frame = frame
self._tabbing = False
self._modifier = modifier
self._timeout = None
def _start_tabbing(self):
if not self._tabbing:
logging.debug('Grabing the input.')
screen = gtk.gdk.screen_get_default()
window = screen.get_root_window()
keyboard_grab_result = gtk.gdk.keyboard_grab(window)
pointer_grab_result = gtk.gdk.pointer_grab(window)
self._tabbing = (keyboard_grab_result == gtk.gdk.GRAB_SUCCESS and
pointer_grab_result == gtk.gdk.GRAB_SUCCESS)
# Now test that the modifier is still active to prevent race
# conditions. We also test if one of the grabs failed.
mask = window.get_pointer()[2]
if not self._tabbing or not (mask & self._modifier):
logging.debug('Releasing grabs again.')
# ungrab keyboard/pointer if the grab was successfull.
if keyboard_grab_result == gtk.gdk.GRAB_SUCCESS:
gtk.gdk.keyboard_ungrab()
if pointer_grab_result == gtk.gdk.GRAB_SUCCESS:
gtk.gdk.pointer_ungrab()
self._tabbing = False
else:
self._frame.show(self._frame.MODE_NON_INTERACTIVE)
def __timeout_cb(self, event_time):
self._activate_current(event_time)
self._timeout = None
return False
def _start_timeout(self, event_time):
self._cancel_timeout()
self._timeout = gobject.timeout_add(_RAISE_DELAY,
lambda: self.__timeout_cb(event_time))
def _cancel_timeout(self):
if self._timeout:
gobject.source_remove(self._timeout)
self._timeout = None
def _activate_current(self, event_time):
home_model = shell.get_model()
activity = home_model.get_tabbing_activity()
if activity and activity.get_window():
activity.get_window().activate(event_time)
def next_activity(self, event_time):
if not self._tabbing:
first_switch = True
self._start_tabbing()
else:
first_switch = False
if self._tabbing:
shell_model = shell.get_model()
zoom_level = shell_model.zoom_level
zoom_activity = (zoom_level == shell.ShellModel.ZOOM_ACTIVITY)
if not zoom_activity and first_switch:
activity = shell_model.get_active_activity()
else:
activity = shell_model.get_tabbing_activity()
activity = shell_model.get_next_activity(current=activity)
shell_model.set_tabbing_activity(activity)
self._start_timeout(event_time)
else:
self._activate_next_activity(event_time)
def previous_activity(self, event_time):
if not self._tabbing:
first_switch = True
self._start_tabbing()
else:
first_switch = False
if self._tabbing:
shell_model = shell.get_model()
zoom_level = shell_model.zoom_level
zoom_activity = (zoom_level == shell.ShellModel.ZOOM_ACTIVITY)
if not zoom_activity and first_switch:
activity = shell_model.get_active_activity()
else:
activity = shell_model.get_tabbing_activity()
activity = shell_model.get_previous_activity(current=activity)
shell_model.set_tabbing_activity(activity)
self._start_timeout(event_time)
else:
self._activate_next_activity(event_time)
def _activate_next_activity(self, event_time):
next_activity = shell.get_model().get_next_activity()
if next_activity:
next_activity.get_window().activate(event_time)
def stop(self, event_time):
gtk.gdk.keyboard_ungrab()
gtk.gdk.pointer_ungrab()
self._tabbing = False
self._frame.hide()
self._cancel_timeout()
self._activate_current(event_time)
home_model = shell.get_model()
home_model.set_tabbing_activity(None)
def is_tabbing(self):
return self._tabbing
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