Current File : //usr/lib/python3/dist-packages/orca/ax_selection.py
# Utilities for obtaining information about containers supporting selection
#
# Copyright 2023 Igalia, S.L.
# Author: Joanmarie Diggs <jdiggs@igalia.com>
#
# 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 2.1 of the License, or (at your option) any later version.
#
# This library 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.
#
# 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., Franklin Street, Fifth Floor,
# Boston MA 02110-1301 USA.
"""
Utilities for obtaining information about containers supporting selection.
These utilities are app-type- and toolkit-agnostic. Utilities that might have
different implementations or results depending on the type of app (e.g. terminal,
chat, web) or toolkit (e.g. Qt, Gtk) should be in script_utilities.py file(s).
N.B. There are currently utilities that should never have custom implementations
that live in script_utilities.py files. These will be moved over time.
"""
__id__ = "$Id$"
__version__ = "$Revision$"
__date__ = "$Date$"
__copyright__ = "Copyright (c) 2023 Igalia, S.L."
__license__ = "LGPL"
import gi
gi.require_version("Atspi", "2.0")
from gi.repository import Atspi
from . import debug
from .ax_object import AXObject
class AXSelection:
"""Utilities for obtaining information about containers supporting selection."""
@staticmethod
def get_selected_child_count(obj):
"""Returns the selected child count of obj"""
if not AXObject.supports_selection(obj):
return 0
try:
count = Atspi.Selection.get_n_selected_children(obj)
except Exception as error:
tokens = ["AXSelection: Exception in get_selected_child_count:", error]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return 0
tokens = ["AXSelection:", obj, "reports", count, "selected children"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return count
@staticmethod
def get_selected_child(obj, index):
"""Returns the nth selected child of obj."""
n_children = AXSelection.get_selected_child_count(obj)
if n_children <= 0:
return None
if index == -1:
index = n_children - 1
if not 0 <= index < n_children:
return None
try:
child = Atspi.Selection.get_selected_child(obj, index)
except Exception as error:
tokens = ["AXSelection: Exception in get_selected_child:", error]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return None
if child == obj:
tokens = ["AXSelection:", obj, "claims to be its own selected child"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return None
tokens = ["AXSelection:", child, "is selected child #", index, "of", obj]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return child
@staticmethod
def get_selected_children(obj):
"""Returns a list of all the selected children of obj."""
count = AXSelection.get_selected_child_count(obj)
children = set()
for i in range(count):
try:
child = Atspi.Selection.get_selected_child(obj, i)
except Exception as error:
tokens = ["AXSelection: Exception in get_selected_children:", error]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return []
if child is not None:
children.add(child)
if obj in children:
tokens = ["AXSelection:", obj, "claims to be its own selected child"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
children.remove(obj)
result = list(children)
if len(result) != count:
tokens = ["AXSelection: Selected child count of", obj, f"is {count}"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return result
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