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# Orca |
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# |
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# Copyright 2004-2007 Sun Microsystems 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 Library 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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# Library General Public License for more details. |
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# |
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# You should have received a copy of the GNU Library 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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|
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"""Provides the FocusTrackingPresenter for Orca.""" |
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__id__ = "$Id: focus_tracking_presenter.py 2578 2007-08-01 08:50:04Z wwalker $" |
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__version__ = "$Revision: 2578 $" |
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__date__ = "$Date: 2007-08-01 04:50:04 -0400 (Wed, 01 Aug 2007) $" |
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__copyright__ = "Copyright (c) 2005-2007 Sun Microsystems Inc." |
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__license__ = "LGPL" |
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|
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import gobject |
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import Queue |
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import threading |
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import time |
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|
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import atspi |
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import braille |
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import default |
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import debug |
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import input_event |
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import orca_state |
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import presentation_manager |
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import rolenames |
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import settings |
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import speech |
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|
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from orca_i18n import _ # for gettext support |
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import CORBA |
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|
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class FocusTrackingPresenter(presentation_manager.PresentationManager): |
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"""Maintain a set of scripts for all running applications, and |
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also keeps the notion of an activeScript. All object events are |
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passed to the associated script for that application, regardless if |
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the application has keyboard focus or not. All keyboard events are |
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passed to the active script only if it has indicated interest in the |
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event.""" |
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|
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def __init__(self): |
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|
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# Dictionary that keeps count of event listeners by type. |
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# This is a bit convoluted for now, but what happens is that |
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# scripts tell the FocusTrackingPresenter to listen for |
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# object events based on what they want, and the |
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# FocusTrackingPresenter then eventually passes them to the |
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# script. Because both the FocusTrackingPresenter and scripts |
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# are interested in object events, and the FocusTrackingPresenter |
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# is what delves them out, we keep at most one listener to avoid |
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# receiving the same event twice in a row. |
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# |
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self.registry = atspi.Registry() |
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self._knownScripts = {} |
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self._knownAppSettings = {} |
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self._oldAppSettings = None |
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self._eventQueue = Queue.Queue(0) |
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self._gidleId = 0 |
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self._gidleLock = threading.Lock() |
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self.noFocusTimestamp = 0.0 |
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|
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self.setActiveScript(None) |
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|
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if settings.debugEventQueue: |
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self._enqueueEventCount = 0 |
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self._dequeueEventCount = 0 |
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|
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######################################################################## |
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# # |
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# METHODS FOR KEEPING TRACK OF LISTENERS REGISTERED WITH ATSPI # |
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# # |
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######################################################################## |
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|
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def _registerEventListener(self, eventType): |
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"""Tells this module to listen for the given event type. |
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|
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Arguments: |
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- eventType: the event type. |
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""" |
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|
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if self._listenerCounts.has_key(eventType): |
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self._listenerCounts[eventType] += 1 |
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else: |
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self.registry.registerEventListener(self._enqueueEvent, |
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eventType) |
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self._listenerCounts[eventType] = 1 |
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|
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def _deregisterEventListener(self, eventType): |
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"""Tells this module to stop listening for the given event type. |
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|
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Arguments: |
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- eventType: the event type. |
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""" |
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|
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self._listenerCounts[eventType] -= 1 |
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if self._listenerCounts[eventType] == 0: |
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self.registry.deregisterEventListener(self._enqueueEvent, |
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eventType) |
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del self._listenerCounts[eventType] |
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|
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def _registerEventListeners(self, script): |
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"""Tells the FocusTrackingPresenter to listen for all |
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the event types of interest to the script. |
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|
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Arguments: |
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- script: the script. |
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""" |
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for eventType in script.listeners.keys(): |
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self._registerEventListener(eventType) |
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|
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def _deregisterEventListeners(self, script): |
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"""Tells the FocusTrackingPresenter to stop listening for all the |
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event types of interest to the script. |
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|
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Arguments: |
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- script: the script. |
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""" |
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for eventType in script.listeners.keys(): |
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self._deregisterEventListener(eventType) |
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|
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######################################################################## |
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# # |
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# METHODS FOR KEEPING TRACK OF KNOWN SCRIPTS. # |
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# # |
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######################################################################## |
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# The cache of the currently known scripts. The key is the Python |
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# Accessible application, and the value is the script for that app. |
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# |
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|
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def _createScript(self, app): |
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"""For the given application name, create a new script instance. |
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We'll first see if a mapping from appName to module name exists. |
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If it does, we use that. If it doesn't, we try the app name. |
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If all else fails, we fall back to the default script. |
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""" |
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script = None |
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if settings.enableCustomScripts: |
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# Look for custom scripts first. |
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# |
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# We'll use the LEVEL_FINEST level for debug output here as |
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# it really isn't an error if the script cannot be found. |
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# But, sometimes a script cannot be "found" because it has |
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# a syntax error in it, so we want to give script writers |
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# a vehicle for debugging these types of things. |
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# |
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scriptPackages = settings.scriptPackages |
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|
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moduleName = settings.getScriptModuleName(app) |
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module = None |
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|
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if moduleName and len(moduleName): |
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for package in scriptPackages: |
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if len(package): |
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name = package + "." + moduleName |
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else: |
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name = moduleName |
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try: |
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debug.println(debug.LEVEL_FINEST, |
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"Looking for script at %s.py..." % name) |
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module = __import__(name, |
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globals(), |
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locals(), |
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['']) |
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debug.println(debug.LEVEL_FINEST, |
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"...found %s.py" % name) |
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break |
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except ImportError: |
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debug.println(debug.LEVEL_FINEST, |
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"...could not find %s.py" % name) |
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except: |
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debug.printException(debug.LEVEL_SEVERE) |
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debug.println(debug.LEVEL_SEVERE, |
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"While attempting to import %s" % name) |
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if module: |
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try: |
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script = module.Script(app) |
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except: |
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# We do not want the getScript method to fail. If it does, |
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# we want to let the script developer know what went wrong, |
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# but we also want to move along without crashing Orca. |
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# |
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debug.printException(debug.LEVEL_SEVERE) |
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|
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# If there is no custom script for an application, try seeing if |
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# there is a script for the toolkit of the application. If there |
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# is, then try to use it. If there isn't, then fall back to the |
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# default script. Note that this search is restricted to the "orca" |
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# package for now. |
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# |
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if (not script) \ |
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and app \ |
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and app.__dict__.has_key("toolkitName") \ |
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and app.toolkitName: |
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|
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try: |
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debug.println( |
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debug.LEVEL_FINE, |
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"Looking for toolkit script %s.py..." % app.toolkitName) |
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module = __import__(app.toolkitName, |
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globals(), |
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locals(), |
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['']) |
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script = module.Script(app) |
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debug.println(debug.LEVEL_FINE, |
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"...found %s.py" % name) |
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except ImportError: |
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debug.println( |
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debug.LEVEL_FINE, |
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"...could not find %s.py" % app.toolkitName) |
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except: |
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debug.printException(debug.LEVEL_SEVERE) |
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debug.println( |
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debug.LEVEL_SEVERE, |
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"While attempting to import %s" % app.toolkitName) |
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|
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if not script: |
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script = default.Script(app) |
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|
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return script |
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|
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def _getScript(self, app): |
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"""Get a script for an app (and make it if necessary). This is used |
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instead of a simple calls to Script's constructor. |
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|
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Arguments: |
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- app: the Python app |
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|
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Returns an instance of a Script. |
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""" |
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|
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# We might not know what the app is. In this case, just defer |
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# to the default script for support. |
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# |
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if not app: |
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if not self._defaultScript: |
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self._defaultScript = default.Script(None) |
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self._registerEventListeners(self._defaultScript) |
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script = self._defaultScript |
259 |
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elif self._knownScripts.has_key(app): |
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script = self._knownScripts[app] |
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else: |
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script = self._createScript(app) |
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self._knownScripts[app] = script |
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self._registerEventListeners(script) |
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|
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return script |
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|
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def setActiveScript(self, newScript): |
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"""Set the new active script. |
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|
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Arguments: |
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- newScript: the new script to be made active. |
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""" |
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|
275 |
360 |
try: |
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# If old ("factory") settings don't exist yet, save |
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# a set, else restore the old application settings. |
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# |
279 |
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if not self._oldAppSettings: |
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self._oldAppSettings = \ |
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orca_state.activeScript.saveOldAppSettings() |
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else: |
283 |
356 |
orca_state.activeScript.restoreOldAppSettings( \ |
284 |
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self._oldAppSettings) |
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|
286 |
358 |
orca_state.activeScript.deactivate() |
287 |
2 |
except: |
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pass |
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|
290 |
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orca_state.activeScript = newScript |
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|
292 |
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try: |
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orca_state.activeScript.activate() |
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except: |
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pass |
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|
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def _cleanupCache(self): |
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"""Looks for defunct accessible objects in the cache and removes them. |
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""" |
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|
301 |
148 |
objectsRemoved = 0 |
302 |
5652 |
for obj in atspi.Accessible._cache.values(): |
303 |
5504 |
try: |
304 |
5504 |
if obj.state.count(atspi.Accessibility.STATE_DEFUNCT): |
305 |
0 |
atspi.Accessible.deleteAccessible(obj) |
306 |
0 |
objectsRemoved += 1 |
307 |
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else: |
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# Try to force a COMM_FAILURE |
309 |
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# |
310 |
5504 |
obj.toString() |
311 |
628 |
except CORBA.COMM_FAILURE: |
312 |
628 |
atspi.Accessible.deleteAccessible(obj) |
313 |
628 |
objectsRemoved += 1 |
314 |
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|
315 |
148 |
debug.println(debug.LEVEL_FINEST, |
316 |
148 |
"_cleanupCache: %d objects removed." % objectsRemoved) |
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|
318 |
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def _cleanupGarbage(self): |
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"""Cleans up garbage on the heap.""" |
320 |
0 |
import gc |
321 |
0 |
gc.collect() |
322 |
0 |
for obj in gc.garbage: |
323 |
0 |
try: |
324 |
0 |
if isinstance(obj, atspi.Accessible): |
325 |
0 |
gc.garbage.remove(obj) |
326 |
0 |
obj.__del__() |
327 |
0 |
except: |
328 |
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pass |
329 |
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|
330 |
1 |
def _reclaimScripts(self): |
331 |
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"""Compares the list of known scripts to the list of known apps, |
332 |
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deleting any scripts as necessary. |
333 |
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""" |
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|
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# Sometimes the desktop can become unavailable. This happens |
336 |
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# often when synaptic is used to load new modules (see the bug |
337 |
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# report http://bugzilla.gnome.org/show_bug.cgi?id=342022). |
338 |
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# So...if this happens, we'll just move along. The next |
339 |
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# successful call to _reclaimScripts will reclaim anything we |
340 |
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# didn't reclaim this time. |
341 |
|
# |
342 |
148 |
try: |
343 |
148 |
apps = [] |
344 |
148 |
desktop = self.registry.desktop |
345 |
2865 |
for i in range(0, desktop.childCount): |
346 |
2717 |
try: |
347 |
2717 |
acc = desktop.getChildAtIndex(i) |
348 |
2569 |
app = atspi.Accessible.makeAccessible(acc) |
349 |
2569 |
if app: |
350 |
2537 |
apps.insert(0, app) |
351 |
148 |
except: |
352 |
148 |
pass |
353 |
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|
354 |
620 |
for app in self._knownScripts.keys(): |
355 |
472 |
if apps.count(app) == 0: |
356 |
74 |
script = self._knownScripts[app] |
357 |
74 |
self._deregisterEventListeners(script) |
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|
359 |
|
# Provide a bunch of hints to the garbage collector |
360 |
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# that we just don't care about this stuff any longer. |
361 |
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# Note the "app.app = None" - that helps remove a |
362 |
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# cycle of the application referring to itself. |
363 |
|
# |
364 |
74 |
del self._knownScripts[app] |
365 |
74 |
app.app = None |
366 |
74 |
del app |
367 |
74 |
del script |
368 |
0 |
except: |
369 |
0 |
debug.printException(debug.LEVEL_FINEST) |
370 |
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|
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######################################################################## |
372 |
|
# # |
373 |
|
# METHODS FOR KEEPING TRACK OF APPLICATION SETTINGS. # |
374 |
|
# # |
375 |
|
######################################################################## |
376 |
|
|
377 |
1 |
def loadAppSettings(self, script): |
378 |
|
"""Load the users application specific settings for an app. |
379 |
|
|
380 |
|
Arguments: |
381 |
|
- script: the current active script. |
382 |
|
""" |
383 |
|
|
384 |
357 |
app = script.app |
385 |
357 |
settingsPackages = settings.settingsPackages |
386 |
357 |
moduleName = settings.getScriptModuleName(app) |
387 |
357 |
module = None |
388 |
|
|
389 |
357 |
if moduleName and len(moduleName): |
390 |
714 |
for package in settingsPackages: |
391 |
357 |
if len(package): |
392 |
357 |
name = package + "." + moduleName |
393 |
|
else: |
394 |
0 |
name = moduleName |
395 |
357 |
try: |
396 |
357 |
debug.println(debug.LEVEL_FINEST, |
397 |
357 |
"Looking for settings at %s.py..." % name) |
398 |
357 |
if not self._knownAppSettings.has_key(name): |
399 |
|
self._knownAppSettings[name] = \ |
400 |
357 |
__import__(name, globals(), locals(), ['']) |
401 |
0 |
reload(self._knownAppSettings[name]) |
402 |
0 |
debug.println(debug.LEVEL_FINEST, |
403 |
0 |
"...found %s.py" % name) |
404 |
|
|
405 |
|
# Setup the user's application specific key bindings. |
406 |
|
# (if any). |
407 |
|
# |
408 |
0 |
if hasattr(self._knownAppSettings[name], |
409 |
0 |
"overrideAppKeyBindings"): |
410 |
|
script.overrideAppKeyBindings = \ |
411 |
0 |
self._knownAppSettings[name].overrideAppKeyBindings |
412 |
|
script.keyBindings = \ |
413 |
0 |
self._knownAppSettings[name].overrideAppKeyBindings( \ |
414 |
0 |
script, script.keyBindings) |
415 |
|
|
416 |
|
# Setup the user's application specific pronunciations |
417 |
|
# (if any). |
418 |
|
# |
419 |
0 |
if hasattr(self._knownAppSettings[name], |
420 |
0 |
"overridePronunciations"): |
421 |
|
script.overridePronunciations = \ |
422 |
0 |
self._knownAppSettings[name].overridePronunciations |
423 |
|
script.app_pronunciation_dict = \ |
424 |
0 |
self._knownAppSettings[name].overridePronunciations( \ |
425 |
0 |
script, script.app_pronunciation_dict) |
426 |
|
|
427 |
0 |
break |
428 |
357 |
except ImportError: |
429 |
357 |
debug.println(debug.LEVEL_FINEST, |
430 |
357 |
"...could not find %s.py" % name) |
431 |
|
|
432 |
|
######################################################################## |
433 |
|
# # |
434 |
|
# METHODS FOR PRE-PROCESSING AND MASSAGING AT-SPI OBJECT EVENTS # |
435 |
|
# for processing by the rest of Orca. # |
436 |
|
# # |
437 |
|
######################################################################## |
438 |
|
|
439 |
1 |
def _processKeyboardEvent(self, keyboardEvent): |
440 |
|
"""Processes the given keyboard event based on the keybinding from the |
441 |
|
currently active script. |
442 |
|
|
443 |
|
Arguments: |
444 |
|
- keyboardEvent: an instance of input_event.KeyboardEvent |
445 |
|
""" |
446 |
193 |
if orca_state.activeScript: |
447 |
193 |
try: |
448 |
193 |
orca_state.activeScript.processKeyboardEvent(keyboardEvent) |
449 |
0 |
except: |
450 |
0 |
debug.printException(debug.LEVEL_WARNING) |
451 |
0 |
debug.printStack(debug.LEVEL_WARNING) |
452 |
|
|
453 |
1 |
def _processBrailleEvent(self, brailleEvent): |
454 |
|
"""Called whenever a cursor key is pressed on the Braille display. |
455 |
|
|
456 |
|
Arguments: |
457 |
|
- brailleEvent: an instance of input_event.BrailleEvent |
458 |
|
""" |
459 |
0 |
if orca_state.activeScript: |
460 |
0 |
try: |
461 |
0 |
orca_state.activeScript.processBrailleEvent(brailleEvent) |
462 |
0 |
except: |
463 |
0 |
debug.printException(debug.LEVEL_WARNING) |
464 |
0 |
debug.printStack(debug.LEVEL_WARNING) |
465 |
|
|
466 |
1 |
def _processObjectEvent(self, event): |
467 |
|
"""Handles all events destined for scripts. |
468 |
|
|
469 |
|
Arguments: |
470 |
|
- e: an at-spi event. |
471 |
|
""" |
472 |
|
|
473 |
13852 |
debug.printObjectEvent(debug.LEVEL_FINEST, event) |
474 |
|
|
475 |
|
# [[[TODO: WDW - HACK to prevent gnome-panel from killing |
476 |
|
# itself. It seems to do so after it issues some tool tip |
477 |
|
# events and Orca attempts to process them. We're not really |
478 |
|
# doing anything with tool tips right now, so we just ignore |
479 |
|
# them. Note that this is just a bandaid to the problem. We |
480 |
|
# should do something better. Please refer to bug 368626 |
481 |
|
# http://bugzilla.gnome.org/show_bug.cgi?id=368626 to follow |
482 |
|
# this problem.]]] |
483 |
|
# |
484 |
13852 |
try: |
485 |
13852 |
if event.source.role == rolenames.ROLE_TOOL_TIP: |
486 |
|
# Check that it's okay to present tool tips. Always present |
487 |
|
# tooltips initiated by the user pressing Control-F1 on the |
488 |
|
# keyboard. |
489 |
|
# |
490 |
0 |
if isinstance(orca_state.lastInputEvent, \ |
491 |
0 |
input_event.KeyboardEvent): |
492 |
0 |
if not orca_state.lastNonModifierKeyEvent.event_string == "F1": |
493 |
0 |
return |
494 |
|
|
495 |
|
# Mouse move events don't update orca_state.lastInputEvent |
496 |
|
# so it's possible the user accidentally nudged the |
497 |
|
# mouse and generated another tooltip event. If the |
498 |
|
# current time minus the last keyboard event time is |
499 |
|
# greater than 0.2 seconds, than just ignore this tooltip |
500 |
|
# event. |
501 |
|
# |
502 |
0 |
currentTime = time.time() |
503 |
0 |
if (currentTime - orca_state.lastInputEvent.time) > 0.2: |
504 |
0 |
return |
505 |
0 |
elif not settings.presentToolTips: |
506 |
0 |
return |
507 |
0 |
except: |
508 |
0 |
pass |
509 |
|
|
510 |
|
# Reclaim (delete) any scripts when desktop children go away. |
511 |
|
# The idea here is that a desktop child is an app. We also |
512 |
|
# generally do not like object:children-changed:remove events, |
513 |
|
# either. |
514 |
|
# |
515 |
13852 |
if event.type == "object:children-changed:remove": |
516 |
148 |
if event.source == atspi.Accessible.makeAccessible( |
517 |
148 |
self.registry.desktop): |
518 |
148 |
self._reclaimScripts() |
519 |
148 |
self._cleanupCache() |
520 |
148 |
if settings.debugMemoryUsage: |
521 |
0 |
self._cleanupGarbage() |
522 |
148 |
return |
523 |
|
|
524 |
13704 |
try: |
525 |
|
# We don't want to touch a defunct object. It's useless and it |
526 |
|
# can cause hangs. |
527 |
|
# |
528 |
13704 |
if event.source \ |
529 |
13704 |
and event.source.state.count(atspi.Accessibility.STATE_DEFUNCT): |
530 |
819 |
debug.println(debug.LEVEL_FINEST, |
531 |
819 |
"IGNORING DEFUNCT OBJECT") |
532 |
819 |
atspi.Accessible.deleteAccessible(event.source) |
533 |
819 |
return |
534 |
|
|
535 |
12885 |
if (not debug.eventDebugFilter) \ |
536 |
0 |
or (debug.eventDebugFilter \ |
537 |
0 |
and debug.eventDebugFilter.match(event.type)): |
538 |
12885 |
if not event.type.startswith("mouse:"): |
539 |
12885 |
debug.printDetails(debug.LEVEL_FINEST, " ", event.source) |
540 |
|
|
541 |
0 |
except CORBA.COMM_FAILURE: |
542 |
0 |
debug.printException(debug.LEVEL_WARNING) |
543 |
0 |
debug.println(debug.LEVEL_FINEST, |
544 |
0 |
"COMM_FAILURE above while processing event: " \ |
545 |
0 |
+ event.type) |
546 |
0 |
except CORBA.OBJECT_NOT_EXIST: |
547 |
0 |
debug.printException(debug.LEVEL_WARNING) |
548 |
0 |
debug.println(debug.LEVEL_WARNING, |
549 |
0 |
"OBJECT_NOT_EXIST above while processing event: " \ |
550 |
0 |
+ event.type) |
551 |
0 |
atspi.Accessible.deleteAccessible(event.source) |
552 |
0 |
return |
553 |
0 |
except: |
554 |
0 |
debug.printException(debug.LEVEL_WARNING) |
555 |
0 |
return |
556 |
|
|
557 |
12885 |
if not event.source: |
558 |
0 |
debug.println(debug.LEVEL_WARNING, |
559 |
0 |
"ERROR: received an event with no source.") |
560 |
0 |
return |
561 |
|
|
562 |
|
# We can sometimes get COMM_FAILURES even if the object has not |
563 |
|
# gone away. This happens a lot with the Java access bridge. |
564 |
|
# So...we will try a few times before giving up. |
565 |
|
# |
566 |
|
# [[[TODO: WDW - might want to consider re-introducing the reload |
567 |
|
# feature of scripts somewhere around here. I pulled it out as |
568 |
|
# part of the big refactor to make scripts object-oriented. Logged |
569 |
|
# as bugzilla bug 319777.]]] |
570 |
|
# |
571 |
12885 |
retryCount = 0 |
572 |
12885 |
oldLocusOfFocus = orca_state.locusOfFocus |
573 |
12885 |
try: |
574 |
|
# If we've received a mouse event, then don't try to get |
575 |
|
# event.source.app because the top most parent is of role |
576 |
|
# unknown, which will cause an ERROR message to be displayed. |
577 |
|
# See Orca bug #409731 for more details. |
578 |
|
# |
579 |
12885 |
if not event.type.startswith("mouse:"): |
580 |
12885 |
s = self._getScript(event.source.app) |
581 |
|
else: |
582 |
0 |
s = orca_state.activeScript |
583 |
12885 |
if not s: |
584 |
0 |
return |
585 |
0 |
except: |
586 |
0 |
s = None |
587 |
0 |
debug.printException(debug.LEVEL_WARNING) |
588 |
0 |
debug.println(debug.LEVEL_WARNING, |
589 |
0 |
"ERROR: received an event, but Script is None") |
590 |
|
|
591 |
12885 |
while s and retryCount <= s.commFailureAttemptLimit: |
592 |
13070 |
try: |
593 |
13070 |
if not event.source.state.count( \ |
594 |
13070 |
atspi.Accessibility.STATE_ICONIFIED): |
595 |
|
|
596 |
|
# [[[TODO: WDW - HACK we look for frame that get |
597 |
|
# focus: as a means to detect active scripts |
598 |
|
# because yelp does this. Actually, yelp is a bit |
599 |
|
# odd in that it calls itself 'yelp' then changes |
600 |
|
# its application name and id to the Gecko toolkit |
601 |
|
# in use, and then issues a focus: event on the |
602 |
|
# main window, which is a frame.]]] |
603 |
|
# |
604 |
13070 |
if (event.type == "window:activate") \ |
605 |
12713 |
or ((event.type == "focus:") \ |
606 |
346 |
and (event.source.role == rolenames.ROLE_FRAME)): |
607 |
|
|
608 |
|
# We'll let someone else decide if it's important |
609 |
|
# to stop speech or not. |
610 |
|
#speech.stop() |
611 |
357 |
debug.println(debug.LEVEL_FINE, "ACTIVE SCRIPT: " \ |
612 |
357 |
+ orca_state.activeScript.name) |
613 |
|
|
614 |
357 |
self.setActiveScript(self._getScript(event.source.app)) |
615 |
|
|
616 |
|
# Load in the application specific settings for the |
617 |
|
# app for this event (if found). |
618 |
|
# |
619 |
357 |
appSettings = self.loadAppSettings( \ |
620 |
357 |
orca_state.activeScript) |
621 |
|
|
622 |
|
# Tell BrlTTY which commands we care about. |
623 |
|
# |
624 |
357 |
braille.setupKeyRanges(\ |
625 |
357 |
orca_state.activeScript.brailleBindings.keys()) |
626 |
|
|
627 |
13070 |
s.processObjectEvent(event) |
628 |
12848 |
if retryCount: |
629 |
0 |
debug.println(debug.LEVEL_WARNING, |
630 |
0 |
" SUCCEEDED AFTER %d TRIES" % retryCount) |
631 |
12848 |
break |
632 |
222 |
except CORBA.COMM_FAILURE: |
633 |
222 |
debug.printException(debug.LEVEL_WARNING) |
634 |
222 |
debug.println(debug.LEVEL_WARNING, |
635 |
222 |
"COMM_FAILURE above while processing: " \ |
636 |
222 |
+ event.type) |
637 |
222 |
retryCount += 1 |
638 |
222 |
if retryCount <= s.commFailureAttemptLimit: |
639 |
|
# We want the old locus of focus to be reset so |
640 |
|
# the proper stuff will be spoken if the locus |
641 |
|
# of focus changed during our last attempt at |
642 |
|
# handling this event. |
643 |
|
# |
644 |
185 |
orca_state.locusOfFocus = oldLocusOfFocus |
645 |
185 |
debug.println(debug.LEVEL_WARNING, |
646 |
185 |
" TRYING AGAIN (%d)" % retryCount) |
647 |
185 |
time.sleep(s.commFailureWaitTime) |
648 |
|
else: |
649 |
37 |
debug.println(debug.LEVEL_WARNING, |
650 |
37 |
" GIVING UP AFTER %d TRIES" \ |
651 |
37 |
% (retryCount - 1)) |
652 |
37 |
atspi.Accessible.deleteAccessible(event.source) |
653 |
0 |
except: |
654 |
0 |
debug.printException(debug.LEVEL_WARNING) |
655 |
0 |
break |
656 |
|
|
657 |
1 |
def _enqueueEvent(self, e): |
658 |
|
"""Handles all events destined for scripts. |
659 |
|
|
660 |
|
Arguments: |
661 |
|
- e: an at-spi event. |
662 |
|
""" |
663 |
|
|
664 |
25766 |
if settings.debugEventQueue: |
665 |
0 |
if self._enqueueEventCount: |
666 |
0 |
debug.println(debug.LEVEL_ALL, |
667 |
0 |
"focus_tracking_presenter._enqueueEvent has " \ |
668 |
|
"been entered before exiting (count = %d)" \ |
669 |
0 |
% self._enqueueEventCount) |
670 |
0 |
self._enqueueEventCount += 1 |
671 |
|
|
672 |
25766 |
event = None |
673 |
25766 |
if isinstance(e, input_event.KeyboardEvent): |
674 |
193 |
if e.type == atspi.Accessibility.KEY_PRESSED_EVENT: |
675 |
97 |
debug.println(debug.LEVEL_ALL, |
676 |
97 |
"----------> QUEUEING KEYPRESS '%s' (%d)" |
677 |
97 |
% (e.event_string, e.hw_code)) |
678 |
96 |
elif e.type == atspi.Accessibility.KEY_RELEASED_EVENT: |
679 |
96 |
debug.println(debug.LEVEL_ALL, |
680 |
96 |
"----------> QUEUEING KEYRELEASE '%s' (%d)" |
681 |
96 |
% (e.event_string, e.hw_code)) |
682 |
193 |
event = e |
683 |
25573 |
elif isinstance(e, input_event.BrailleEvent): |
684 |
0 |
debug.println(debug.LEVEL_ALL, |
685 |
0 |
"----------> QUEUEING BRAILLE COMMAND %d" % e.event) |
686 |
0 |
event = e |
687 |
|
else: |
688 |
|
# We ignore defunct objects and let the atspi module take |
689 |
|
# care of them for us. |
690 |
|
# |
691 |
25573 |
if (e.type == "object:state-changed:defunct"): |
692 |
2457 |
if settings.debugEventQueue: |
693 |
0 |
self._enqueueEventCount -= 1 |
694 |
2457 |
return |
695 |
|
|
696 |
|
# We also generally do not like |
697 |
|
# object:property-change:accessible-parent events because |
698 |
|
# they indicate something is now whacked with the |
699 |
|
# hierarchy, so we just ignore them and let the atspi |
700 |
|
# module take care of it for us. |
701 |
|
# |
702 |
23116 |
if e.type == "object:property-change:accessible-parent": |
703 |
3118 |
if settings.debugEventQueue: |
704 |
0 |
self._enqueueEventCount -= 1 |
705 |
3118 |
return |
706 |
|
|
707 |
|
# At this point in time, we only care when objects are |
708 |
|
# removed from the desktop. |
709 |
|
# |
710 |
19998 |
if (e.type == "object:children-changed:remove") \ |
711 |
6294 |
and (e.source != self.registry.desktop): |
712 |
6146 |
if settings.debugEventQueue: |
713 |
0 |
self._enqueueEventCount -= 1 |
714 |
6146 |
return |
715 |
|
|
716 |
|
# We create the event here because it will ref everything |
717 |
|
# we want it to ref, thus allowing things to survive until |
718 |
|
# they are processed on the gidle thread. |
719 |
|
# |
720 |
|
# If the event doesn't have a source or that source is not marked |
721 |
|
# valid, then we don't care about this event. Just return. |
722 |
|
# |
723 |
13852 |
event = atspi.Event(e) |
724 |
13852 |
if not event.source or not event.source.valid: |
725 |
0 |
debug.println(debug.LEVEL_FINEST, |
726 |
0 |
"---------> IGNORING INVALID EVENT %s" % e.type) |
727 |
0 |
if settings.debugEventQueue: |
728 |
0 |
self._enqueueEventCount -= 1 |
729 |
0 |
return |
730 |
|
|
731 |
13852 |
if (not debug.eventDebugFilter) \ |
732 |
0 |
or (debug.eventDebugFilter \ |
733 |
0 |
and debug.eventDebugFilter.match(e.type)): |
734 |
13852 |
debug.println(debug.LEVEL_ALL, |
735 |
13852 |
"---------> QUEUEING EVENT %s" % e.type) |
736 |
|
|
737 |
14045 |
if event: |
738 |
14045 |
if settings.debugEventQueue: |
739 |
0 |
debug.println(debug.LEVEL_ALL, |
740 |
0 |
" acquiring lock...") |
741 |
14045 |
self._gidleLock.acquire() |
742 |
14045 |
if settings.debugEventQueue: |
743 |
0 |
debug.println(debug.LEVEL_ALL, |
744 |
0 |
" ...acquired") |
745 |
0 |
debug.println(debug.LEVEL_ALL, |
746 |
0 |
" calling queue.put...") |
747 |
0 |
debug.println(debug.LEVEL_ALL, |
748 |
0 |
" (full=%s)" % self._eventQueue.full()) |
749 |
14045 |
self._eventQueue.put(event) |
750 |
14045 |
if settings.debugEventQueue: |
751 |
0 |
debug.println(debug.LEVEL_ALL, |
752 |
0 |
" ...put complete") |
753 |
14045 |
if settings.asyncMode and (not self._gidleId): |
754 |
1818 |
if settings.gilSleepTime: |
755 |
1818 |
time.sleep(settings.gilSleepTime) |
756 |
1818 |
self._gidleId = gobject.idle_add(self._dequeueEvent) |
757 |
|
|
758 |
14045 |
if settings.debugEventQueue: |
759 |
0 |
debug.println(debug.LEVEL_ALL, |
760 |
0 |
" releasing lock...") |
761 |
14045 |
self._gidleLock.release() |
762 |
14045 |
if settings.debugEventQueue: |
763 |
0 |
debug.println(debug.LEVEL_ALL, |
764 |
0 |
" ...released") |
765 |
|
|
766 |
14045 |
if not settings.asyncMode: |
767 |
0 |
self._dequeueEvent() |
768 |
|
|
769 |
14045 |
if settings.debugEventQueue: |
770 |
0 |
self._enqueueEventCount -= 1 |
771 |
|
|
772 |
|
# [[[TODO: HACK - on some hangs, we see the event queue growing, |
773 |
|
# but the thread to take the events off is hung. We might be |
774 |
|
# able to 'recover' by quitting when we see this happen.]]] |
775 |
|
# |
776 |
|
#if self._eventQueue.qsize() > 500: |
777 |
|
# print "Looks like something has hung. Here's the threads:" |
778 |
|
# for someThread in threading.enumerate(): |
779 |
|
# print someThread.getName(), someThread.isAlive() |
780 |
|
# print "Quitting Orca." |
781 |
|
# orca.shutdown() |
782 |
|
|
783 |
1 |
def _dequeueEvent(self): |
784 |
|
"""Handles all events destined for scripts. Called by the GTK |
785 |
|
idle thread. |
786 |
|
""" |
787 |
|
|
788 |
14045 |
rerun = True |
789 |
|
|
790 |
14045 |
if settings.debugEventQueue: |
791 |
0 |
debug.println(debug.LEVEL_ALL, |
792 |
0 |
"Entering focus_tracking_presenter._dequeueEvent" \ |
793 |
0 |
+ " %d" % self._dequeueEventCount) |
794 |
0 |
self._dequeueEventCount += 1 |
795 |
|
|
796 |
14045 |
try: |
797 |
14045 |
event = self._eventQueue.get_nowait() |
798 |
|
|
799 |
14045 |
if isinstance(event, input_event.KeyboardEvent): |
800 |
193 |
if event.type == atspi.Accessibility.KEY_PRESSED_EVENT: |
801 |
97 |
debug.println(debug.LEVEL_ALL, |
802 |
97 |
"DEQUEUED KEYPRESS '%s' (%d) <----------" \ |
803 |
97 |
% (event.event_string, event.hw_code)) |
804 |
97 |
pressRelease = "PRESS" |
805 |
96 |
elif event.type == atspi.Accessibility.KEY_RELEASED_EVENT: |
806 |
96 |
debug.println(debug.LEVEL_ALL, |
807 |
96 |
"DEQUEUED KEYRELEASE '%s' (%d) <----------" \ |
808 |
96 |
% (event.event_string, event.hw_code)) |
809 |
96 |
pressRelease = "RELEASE" |
810 |
193 |
debug.println(debug.eventDebugLevel, |
811 |
193 |
"\nvvvvv PROCESS KEY %s EVENT %s vvvvv"\ |
812 |
193 |
% (pressRelease, event.event_string)) |
813 |
193 |
self._processKeyboardEvent(event) |
814 |
193 |
debug.println(debug.eventDebugLevel, |
815 |
193 |
"\n^^^^^ PROCESS KEY %s EVENT %s ^^^^^"\ |
816 |
193 |
% (pressRelease, event.event_string)) |
817 |
13852 |
elif isinstance(event, input_event.BrailleEvent): |
818 |
0 |
debug.println(debug.LEVEL_ALL, |
819 |
0 |
"DEQUEUED BRAILLE COMMAND %d <----------" \ |
820 |
0 |
% event.event) |
821 |
0 |
debug.println(debug.eventDebugLevel, |
822 |
0 |
"\nvvvvv PROCESS BRAILLE EVENT %d vvvvv"\ |
823 |
0 |
% event.event) |
824 |
0 |
self._processBrailleEvent(event) |
825 |
0 |
debug.println(debug.eventDebugLevel, |
826 |
0 |
"\n^^^^^ PROCESS BRAILLE EVENT %d ^^^^^"\ |
827 |
0 |
% event.event) |
828 |
|
else: |
829 |
13852 |
if (not debug.eventDebugFilter) \ |
830 |
0 |
or (debug.eventDebugFilter \ |
831 |
0 |
and debug.eventDebugFilter.match(event.type)): |
832 |
13852 |
debug.println(debug.LEVEL_ALL, |
833 |
13852 |
"DEQUEUED EVENT %s <----------" \ |
834 |
13852 |
% event.type) |
835 |
13852 |
debug.println(debug.eventDebugLevel, |
836 |
13852 |
"\nvvvvv PROCESS OBJECT EVENT %s vvvvv" \ |
837 |
13852 |
% event.type) |
838 |
13852 |
self._processObjectEvent(event) |
839 |
13852 |
if (not debug.eventDebugFilter) \ |
840 |
0 |
or (debug.eventDebugFilter \ |
841 |
0 |
and debug.eventDebugFilter.match(event.type)): |
842 |
13852 |
debug.println(debug.eventDebugLevel, |
843 |
13852 |
"^^^^^ PROCESS OBJECT EVENT %s ^^^^^\n" \ |
844 |
13852 |
% event.type) |
845 |
|
|
846 |
|
# [[[TODO: HACK - it would seem logical to only do this if we |
847 |
|
# discover the queue is empty, but this inroduces a hang for |
848 |
|
# some reason if done inside an acquire/release block for a |
849 |
|
# lock. So...we do it here.]]] |
850 |
|
# |
851 |
14045 |
noFocus = (not orca_state.activeScript) \ |
852 |
14045 |
or ((not orca_state.locusOfFocus) \ |
853 |
431 |
and (self.noFocusTimestamp \ |
854 |
431 |
!= orca_state.noFocusTimestamp)) |
855 |
|
|
856 |
14045 |
self._gidleLock.acquire() |
857 |
14045 |
if self._eventQueue.empty(): |
858 |
1818 |
if noFocus: |
859 |
0 |
if settings.gilSleepTime: |
860 |
0 |
time.sleep(settings.gilSleepTime) |
861 |
|
# Translators: this is intended to be a short phrase to |
862 |
|
# speak and braille to tell the user that no component |
863 |
|
# has keyboard focus. |
864 |
|
# |
865 |
0 |
message = _("No focus") |
866 |
0 |
if settings.brailleVerbosityLevel == \ |
867 |
0 |
settings.VERBOSITY_LEVEL_VERBOSE: |
868 |
0 |
braille.displayMessage(message) |
869 |
0 |
if settings.speechVerbosityLevel == \ |
870 |
0 |
settings.VERBOSITY_LEVEL_VERBOSE: |
871 |
0 |
speech.speak(message) |
872 |
0 |
self.noFocusTimestamp = orca_state.noFocusTimestamp |
873 |
1818 |
self._gidleId = 0 |
874 |
1818 |
rerun = False # destroy and don't call again |
875 |
14045 |
self._gidleLock.release() |
876 |
0 |
except Queue.Empty: |
877 |
0 |
debug.println(debug.LEVEL_SEVERE, |
878 |
0 |
"focus_tracking_presenter:_dequeueEvent: " \ |
879 |
0 |
+ " the event queue is empty!") |
880 |
0 |
except: |
881 |
0 |
debug.printException(debug.LEVEL_SEVERE) |
882 |
|
|
883 |
14045 |
if settings.debugEventQueue: |
884 |
0 |
self._dequeueEventCount -= 1 |
885 |
0 |
debug.println(debug.LEVEL_ALL, |
886 |
0 |
"Leaving focus_tracking_presenter._dequeueEvent" \ |
887 |
0 |
+ " %d" % self._dequeueEventCount) |
888 |
|
|
889 |
14045 |
return rerun |
890 |
|
|
891 |
1 |
def processKeyboardEvent(self, keyboardEvent): |
892 |
|
"""Processes the given keyboard event based on the keybinding from the |
893 |
|
currently active script. This method is called synchronously from the |
894 |
|
at-spi registry and should be performant. In addition, it must return |
895 |
|
True if it has consumed the event (and False if not). |
896 |
|
|
897 |
|
Arguments: |
898 |
|
- keyboardEvent: an instance of input_event.KeyboardEvent |
899 |
|
|
900 |
|
Returns True if the event should be consumed. |
901 |
|
""" |
902 |
|
|
903 |
3579 |
if orca_state.activeScript \ |
904 |
3579 |
and orca_state.activeScript.consumesKeyboardEvent(keyboardEvent): |
905 |
193 |
self._enqueueEvent(keyboardEvent) |
906 |
193 |
return True |
907 |
|
else: |
908 |
3386 |
return False |
909 |
|
|
910 |
1 |
def processBrailleEvent(self, brailleEvent): |
911 |
|
"""Called whenever a cursor key is pressed on the Braille display. |
912 |
|
|
913 |
|
Arguments: |
914 |
|
- brailleEvent: an instance of input_event.BrailleEvent |
915 |
|
|
916 |
|
Returns True if the command was consumed; otherwise False |
917 |
|
""" |
918 |
|
|
919 |
0 |
if orca_state.activeScript \ |
920 |
0 |
and orca_state.activeScript.consumesBrailleEvent(brailleEvent): |
921 |
0 |
self._enqueueEvent(brailleEvent) |
922 |
0 |
return True |
923 |
|
else: |
924 |
0 |
return False |
925 |
|
|
926 |
1 |
def locusOfFocusChanged(self, event, oldLocusOfFocus, newLocusOfFocus): |
927 |
|
"""Called when the visual object with focus changes. |
928 |
|
|
929 |
|
Arguments: |
930 |
|
- event: if not None, the Event that caused the change |
931 |
|
- oldLocusOfFocus: Accessible that is the old locus of focus |
932 |
|
- newLocusOfFocus: Accessible that is the new locus of focus |
933 |
|
""" |
934 |
|
|
935 |
903 |
if orca_state.activeScript: |
936 |
903 |
orca_state.activeScript.locusOfFocusChanged(event, |
937 |
903 |
oldLocusOfFocus, |
938 |
903 |
newLocusOfFocus) |
939 |
|
|
940 |
1 |
def visualAppearanceChanged(self, event, obj): |
941 |
|
"""Called when the visual appearance of an object changes. |
942 |
|
This method should not be called for objects whose visual |
943 |
|
appearance changes solely because of focus -- locusOfFocusChanged |
944 |
|
is used for that. Instead, it is intended mostly for objects |
945 |
|
whose notional 'value' has changed, such as a checkbox changing |
946 |
|
state, a progress bar advancing, a slider moving, text inserted, |
947 |
|
caret moved, etc. |
948 |
|
|
949 |
|
Arguments: |
950 |
|
- event: if not None, the Event that caused this to happen |
951 |
|
- obj: the Accessible whose visual appearance changed. |
952 |
|
""" |
953 |
|
|
954 |
841 |
if orca_state.activeScript: |
955 |
841 |
orca_state.activeScript.visualAppearanceChanged(event, obj) |
956 |
|
|
957 |
1 |
def _saveAppStates(self): |
958 |
|
"""Saves script and application state information.""" |
959 |
1 |
self._appStateInfo = [] |
960 |
5 |
for script in self._knownScripts.values(): |
961 |
4 |
self._appStateInfo.append([script.app, script.getAppState()]) |
962 |
|
|
963 |
1 |
def _restoreAppStates(self): |
964 |
|
"""Restores script and application state information.""" |
965 |
1 |
try: |
966 |
1 |
for [app, appState] in self._appStateInfo: |
967 |
0 |
script = self._getScript(app) |
968 |
0 |
script.setAppState(appState) |
969 |
1 |
except: |
970 |
1 |
pass |
971 |
|
|
972 |
1 |
self._appStateInfo = None |
973 |
|
|
974 |
1 |
def activate(self): |
975 |
|
"""Called when this presentation manager is activated.""" |
976 |
|
|
977 |
1 |
self._listenerCounts = {} |
978 |
1 |
self._knownScripts = {} |
979 |
1 |
self._knownAppSettings = {} |
980 |
1 |
self._oldAppSettings = None |
981 |
1 |
self._defaultScript = None |
982 |
|
|
983 |
1 |
self._restoreAppStates() |
984 |
|
|
985 |
1 |
self.setActiveScript(self._getScript(None)) |
986 |
|
|
987 |
|
# Tell BrlTTY which commands we care about. |
988 |
|
# |
989 |
1 |
braille.setupKeyRanges(orca_state.activeScript.brailleBindings.keys()) |
990 |
|
|
991 |
1 |
self._registerEventListener("window:activate") |
992 |
1 |
self._registerEventListener("window:deactivate") |
993 |
1 |
self._registerEventListener("object:children-changed:remove") |
994 |
|
|
995 |
1 |
win = orca_state.activeScript.findActiveWindow() |
996 |
1 |
if win: |
997 |
|
# Generate a fake window activation event so the application |
998 |
|
# can tell the user about itself. |
999 |
|
# |
1000 |
1 |
e = atspi.Event() |
1001 |
1 |
e.source = win._acc |
1002 |
1 |
e.type = "window:activate" |
1003 |
1 |
e.detail1 = 0 |
1004 |
1 |
e.detail2 = 0 |
1005 |
1 |
e.any_data = None |
1006 |
1 |
self._enqueueEvent(e) |
1007 |
|
|
1008 |
1 |
def deactivate(self): |
1009 |
|
"""Called when this presentation manager is deactivated.""" |
1010 |
|
|
1011 |
1 |
self._saveAppStates() |
1012 |
|
|
1013 |
28 |
for eventType in self._listenerCounts.keys(): |
1014 |
27 |
self.registry.deregisterEventListener(self._enqueueEvent, |
1015 |
27 |
eventType) |
1016 |
1 |
self._listenerCounts = {} |
1017 |
1 |
self._knownScripts = {} |
1018 |
1 |
self._knownAppSettings = {} |
1019 |
1 |
self._oldAppSettings = None |
1020 |
1 |
self._defaultScript = None |
1021 |
|
|
1022 |
1 |
self.setActiveScript(None) |