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import gi
from gi.repository import Gtk as gtk
from gi.repository import Gdk as gdk
from gi.repository import Wnck as wnck
from accerciser.plugin import Plugin
from accerciser.i18n import N_, _
import pyatspi
class QuickSelect(Plugin):
'''
Plugin class for quick select.
'''
plugin_name = N_('Quick Select')
plugin_name_localized = _(plugin_name)
plugin_description = \
N_('Plugin with various methods of selecting accessibles quickly.')
def init(self):
'''
Initialize plugin.
'''
self.global_hotkeys = [(N_('Inspect last focused accessible'),
self._inspectLastFocused,
gdk.KEY_a, gdk.ModifierType.CONTROL_MASK | \
gdk.ModifierType.MOD1_MASK),
(N_('Inspect accessible under mouse'),
self._inspectUnderMouse,
gdk.KEY_question, gdk.ModifierType.CONTROL_MASK | \
gdk.ModifierType.MOD1_MASK)]
pyatspi.Registry.registerEventListener(self._accEventFocusChanged,
'object:state-changed')
pyatspi.Registry.registerEventListener(self._accEventSelectionChanged,
'object:selection-changed')
self.last_focused = None
self.last_selected = None
def _accEventFocusChanged(self, event):
'''
Hold a reference for the last focused accessible. This is used when a certain
global hotkey is pressed to select this accessible.
@param event: The event that is being handled.
@type event: L{pyatspi.event.Event}
'''
if not self.isMyApp(event.source):
self.last_focused = event.source
def _accEventSelectionChanged(self, event):
'''
Hold a reference for the last parent of a selected accessible.
This will be useful if we want to find an accessible at certain coords.
@param event: The event that is being handled.
@type event: L{pyatspi.event.Event}
'''
if not self.isMyApp(event.source):
self.last_selected = event.source
def _inspectLastFocused(self):
'''
Inspect the last focused widget's accessible.
'''
if self.last_focused:
self.node.update(self.last_focused)
def _inspectUnderMouse(self):
'''
Inspect accessible of widget under mouse.
'''
display = gdk.Display.get_default()
screen, x, y, flags = display.get_pointer()
del screen # A workaround http://bugzilla.gnome.org/show_bug.cgi?id=593732
# First check if the currently selected accessible has the pointer over it.
# This is an optimization: Instead of searching for
# STATE_SELECTED and ROLE_MENU and LAYER_POPUP in the entire tree.
item = self._getPopupItem(x, y)
if item:
self.node.update(item)
return
# Inspect accessible under mouse
desktop = pyatspi.Registry.getDesktop(0)
wnck_screen = wnck.Screen.get_default()
window_order = [w.get_name() for w in wnck_screen.get_windows_stacked()]
top_window = (None, -1)
for app in desktop:
if not app or self.isMyApp(app):
continue
for frame in app:
if not frame:
continue
acc = self._getComponentAtCoords(frame, x, y)
if acc:
try:
z_order = window_order.index(frame.name)
except ValueError:
# It's possibly a popup menu, so it would not be in our frame name
# list. And if it is, it is probably the top-most component.
try:
if acc.queryComponent().getLayer() == pyatspi.LAYER_POPUP:
self.node.update(acc)
return
except:
pass
else:
if z_order > top_window[1]:
top_window = (acc, z_order)
if top_window[0]:
self.node.update(top_window[0])
def _getPopupItem(self, x, y):
suspect_children = []
# First check if the currently selected accessible has the pointer over it.
# This is an optimization: Instead of searching for
# STATE_SELECTED and ROLE_MENU and LAYER_POPUP in the entire tree.
if self.last_selected and \
self.last_selected.getRole() == pyatspi.ROLE_MENU and \
self.last_selected.getState().contains(pyatspi.STATE_SELECTED):
try:
si = self.last_selected.querySelection()
except NotImplementedError:
return None
if si.nSelectedChildren > 0:
suspect_children = [si.getSelectedChild(0)]
else:
suspect_children = self.last_selected
for child in suspect_children:
try:
ci = child.queryComponent()
except NotImplementedError:
continue
if ci.contains(x, y, pyatspi.DESKTOP_COORDS) and \
ci.getLayer() == pyatspi.LAYER_POPUP:
return child
return None
def _getComponentAtCoords(self, parent, x, y):
'''
Gets any child accessible that resides under given desktop coordinates.
@param parent: Top-level accessible.
@type parent: L{Accessibility.Accessible}
@param x: X coordinate.
@type x: integer
@param y: Y coordinate.
@type y: integer
@return: Child accessible at given coordinates, or None.
@rtype: L{Accessibility.Accessible}
'''
container = parent
while True:
container_role = container.getRole()
if container_role == pyatspi.ROLE_PAGE_TAB_LIST:
try:
si = container.querySelection()
container = si.getSelectedChild(0)[0]
except NotImplementedError:
pass
try:
ci = container.queryComponent()
except:
break
else:
inner_container = container
container = ci.getAccessibleAtPoint(x, y, pyatspi.DESKTOP_COORDS)
if not container or container.queryComponent() == ci:
# The gecko bridge simply has getAccessibleAtPoint return itself
# if there are no further children
break
if inner_container == parent:
return None
else:
return inner_container
|
