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# Copyright (C) 2006-2007, Red Hat, Inc.
# Copyright (C) 2009 Simon Schampijer
#
# 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 os
import logging
import subprocess
import errno
import traceback
import sys
import gconf
import dbus
import gtk
from sugar._sugarext import KeyGrabber
from jarabe.model import sound
from jarabe.model import shell
from jarabe.model import session
from jarabe.view.tabbinghandler import TabbingHandler
from jarabe.model.shell import ShellModel
from jarabe import config
from jarabe.journal import journalactivity
_VOLUME_STEP = sound.VOLUME_STEP
_VOLUME_MAX = 100
_TABBING_MODIFIER = gtk.gdk.MOD1_MASK
_actions_table = {
'F1' : 'zoom_mesh',
'F2' : 'zoom_group',
'F3' : 'zoom_home',
'F4' : 'zoom_activity',
'XF86AudioMute' : 'volume_mute',
'F11' : 'volume_down',
'XF86AudioLowerVolume' : 'volume_down',
'F12' : 'volume_up',
'XF86AudioRaiseVolume' : 'volume_up',
'<alt>F11' : 'volume_min',
'<alt>F12' : 'volume_max',
'0x93' : 'frame',
'<alt>Tab' : 'next_window',
'<alt><shift>Tab' : 'previous_window',
'<alt>Escape' : 'close_window',
'0xDC' : 'open_search',
# the following are intended for emulator users
'<alt><shift>f' : 'frame',
'<alt><shift>q' : 'quit_emulator',
'XF86Search' : 'open_search',
'<alt><shift>o' : 'open_search',
'<alt><shift>s' : 'say_text',
}
SPEECH_DBUS_SERVICE = 'org.laptop.Speech'
SPEECH_DBUS_PATH = '/org/laptop/Speech'
SPEECH_DBUS_INTERFACE = 'org.laptop.Speech'
class KeyHandler(object):
def __init__(self, frame):
self._frame = frame
self._key_pressed = None
self._keycode_pressed = 0
self._keystate_pressed = 0
self._speech_proxy = None
self._ungrab_metacity_keys()
self._key_grabber = KeyGrabber()
self._key_grabber.connect('key-pressed',
self._key_pressed_cb)
self._key_grabber.connect('key-released',
self._key_released_cb)
self._tabbing_handler = TabbingHandler(self._frame, _TABBING_MODIFIER)
for f in os.listdir(os.path.join(config.ext_path, 'globalkey')):
if f.endswith('.py') and not f.startswith('__'):
module_name = f[:-3]
try:
logging.debug('Loading module %r', module_name)
module = __import__('globalkey.' + module_name, globals(),
locals(), [module_name])
for key in module.BOUND_KEYS:
if key in _actions_table:
raise ValueError('Key %r is already bound' % key)
_actions_table[key] = module
except:
logging.error('Exception while loading extension:\n' + \
traceback.format_exc())
self._key_grabber.grab_keys(_actions_table.keys())
def _ungrab_metacity_keys(self):
"""So we can grab those instead.
"""
client = gconf.client_get_default()
for key in ['run_command_screenshot', 'switch_windows',
'cycle_windows']:
key = '/apps/metacity/global_keybindings/' + key
client.set_string(key, 'disabled')
def _change_volume(self, step=None, value=None):
if step is not None:
volume = sound.get_volume() + step
elif value is not None:
volume = value
volume = min(max(0, volume), _VOLUME_MAX)
sound.set_volume(volume)
sound.set_muted(volume == 0)
def _get_speech_proxy(self):
if self._speech_proxy is None:
bus = dbus.SessionBus()
speech_obj = bus.get_object(SPEECH_DBUS_SERVICE, SPEECH_DBUS_PATH,
follow_name_owner_changes=True)
self._speech_proxy = dbus.Interface(speech_obj,
SPEECH_DBUS_INTERFACE)
return self._speech_proxy
def _on_speech_err(self, ex):
logging.error('An error occurred with the ESpeak service: %r', ex)
def _primary_selection_cb(self, clipboard, text, user_data):
logging.debug('KeyHandler._primary_selection_cb: %r', text)
if text:
self._get_speech_proxy().SayText(text, reply_handler=lambda: None, \
error_handler=self._on_speech_err)
def handle_say_text(self, event_time):
clipboard = gtk.clipboard_get(selection="PRIMARY")
clipboard.request_text(self._primary_selection_cb)
def handle_previous_window(self, event_time):
self._tabbing_handler.previous_activity(event_time)
def handle_next_window(self, event_time):
self._tabbing_handler.next_activity(event_time)
def handle_close_window(self, event_time):
active_activity = shell.get_model().get_active_activity()
if active_activity.is_journal():
return
active_activity.get_window().close()
def handle_zoom_mesh(self, event_time):
shell.get_model().zoom_level = ShellModel.ZOOM_MESH
def handle_zoom_group(self, event_time):
shell.get_model().zoom_level = ShellModel.ZOOM_GROUP
def handle_zoom_home(self, event_time):
shell.get_model().zoom_level = ShellModel.ZOOM_HOME
def handle_zoom_activity(self, event_time):
shell.get_model().zoom_level = ShellModel.ZOOM_ACTIVITY
def handle_volume_max(self, event_time):
self._change_volume(value=_VOLUME_MAX)
def handle_volume_min(self, event_time):
self._change_volume(value=0)
def handle_volume_mute(self, event_time):
if sound.get_muted() is True:
sound.set_muted(False)
else:
sound.set_muted(True)
def handle_volume_up(self, event_time):
self._change_volume(step=_VOLUME_STEP)
def handle_volume_down(self, event_time):
self._change_volume(step=-_VOLUME_STEP)
def handle_frame(self, event_time):
self._frame.notify_key_press()
def handle_quit_emulator(self, event_time):
session.get_session_manager().shutdown()
def handle_open_search(self, event_time):
journalactivity.get_journal().focus_search()
def _key_pressed_cb(self, grabber, keycode, state, event_time):
key = grabber.get_key(keycode, state)
logging.debug('_key_pressed_cb: %i %i %s', keycode, state, key)
if key:
self._key_pressed = key
self._keycode_pressed = keycode
self._keystate_pressed = state
action = _actions_table[key]
if self._tabbing_handler.is_tabbing():
# Only accept window tabbing events, everything else
# cancels the tabbing operation.
if not action in ["next_window", "previous_window"]:
self._tabbing_handler.stop(event_time)
return True
if hasattr(action, 'handle_key_press'):
action.handle_key_press(key)
elif isinstance(action, basestring):
method = getattr(self, 'handle_' + action)
method(event_time)
else:
raise TypeError('Invalid action %r' % action)
return True
else:
# If this is not a registered key, then cancel tabbing.
if self._tabbing_handler.is_tabbing():
if not grabber.is_modifier(keycode):
self._tabbing_handler.stop(event_time)
return True
return False
def _key_released_cb(self, grabber, keycode, state, event_time):
if self._tabbing_handler.is_tabbing():
# We stop tabbing and switch to the new window as soon as the
# modifier key is raised again.
if grabber.is_modifier(keycode, mask=_TABBING_MODIFIER):
self._tabbing_handler.stop(event_time)
return True
return False
_instance = None
def setup(frame):
global _instance
if _instance:
del _instance
_instance = KeyHandler(frame)
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