Current File : //usr/lib/python3/dist-packages/orca/ax_hypertext.py
# Orca
#
# Copyright 2024 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 accessible hypertext and hyperlinks
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) 2024 Igalia, S.L."
__license__ = "LGPL"
import os
import re
from urllib.parse import urlparse
import gi
gi.require_version("Atspi", "2.0")
from gi.repository import Atspi
from . import debug
from .ax_object import AXObject
class AXHypertext:
"""Utilities for obtaining information about accessible hypertext and hyperlinks."""
@staticmethod
def _get_link_count(obj):
"""Returns the number of hyperlinks in obj."""
if not AXObject.supports_hypertext(obj):
return 0
try:
count = Atspi.Hypertext.get_n_links(obj)
except Exception as error:
msg = f"AXHypertext: Exception in _get_link_count: {error}"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return 0
tokens = ["AXHypertext:", obj, f"reports {count} hyperlinks"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return count
@staticmethod
def _get_link_at_index(obj, index):
"""Returns the hyperlink object at the specified index."""
if not AXObject.supports_hypertext(obj):
return None
try:
link = Atspi.Hypertext.get_link(obj, index)
except Exception as error:
msg = f"AXHypertext: Exception in _get_link_at_index: {error}"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return None
return link
@staticmethod
def get_all_links_in_range(obj, start_offset, end_offset):
"""Returns all the hyperlinks in obj who started within the specified range."""
links = []
for i in range(AXHypertext._get_link_count(obj)):
link = AXHypertext._get_link_at_index(obj, i)
if start_offset <= AXHypertext.get_link_start_offset(link) < end_offset \
or start_offset < AXHypertext.get_link_end_offset(link) <= end_offset:
links.append(link)
tokens = [f"AXHypertext: {len(links)} hyperlinks found in", obj,
f"between start: {start_offset} and end: {end_offset}"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return links
@staticmethod
def get_all_links(obj):
"""Returns a list of all the hyperlinks in obj."""
links = []
for i in range(AXHypertext._get_link_count(obj)):
link = AXHypertext._get_link_at_index(obj, i)
if link is not None:
links.append(link)
tokens = [f"AXHypertext: {len(links)} hyperlinks found in", obj]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return links
@staticmethod
def get_link_uri(obj, index=0):
"""Returns the URI associated with obj at the specified index."""
try:
link = Atspi.Accessible.get_hyperlink(obj)
uri = Atspi.Hyperlink.get_uri(link, index)
except Exception as error:
msg = f"AXHypertext: Exception in get_link_uri: {error}"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return ""
tokens = ["AXHypertext: URI of", obj, f"at index {index} is {uri}"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return uri
@staticmethod
def get_link_start_offset(obj):
"""Returns the start offset of obj in the associated text."""
if isinstance(obj, Atspi.Hyperlink):
link = obj
else:
link = Atspi.Accessible.get_hyperlink(obj)
if link is None:
tokens = ["AXHypertext: Couldn't get hyperlink for", obj]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return -1
try:
offset = Atspi.Hyperlink.get_start_index(link)
except Exception as error:
msg = f"AXHypertext: Exception in get_link_start_offset: {error}"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return -1
tokens = ["AXHypertext: Start offset of", obj, f"is {offset}"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return offset
@staticmethod
def get_link_end_offset(obj):
"""Returns the end offset of obj in the associated text."""
if isinstance(obj, Atspi.Hyperlink):
link = obj
else:
link = Atspi.Accessible.get_hyperlink(obj)
if link is None:
tokens = ["AXHypertext: Couldn't get hyperlink for", obj]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return -1
try:
offset = Atspi.Hyperlink.get_end_index(link)
except Exception as error:
msg = f"AXHypertext: Exception in get_link_end_offset: {error}"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return -1
tokens = ["AXHypertext: End offset of", obj, f"is {offset}"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return offset
@staticmethod
def get_link_basename(obj, index=0, remove_extension=False):
"""Strip directory and suffix off of the URL associated with obj."""
uri = AXHypertext.get_link_uri(obj, index)
if not uri:
return ""
parsed_uri = urlparse(uri)
basename = os.path.basename(parsed_uri.path)
if remove_extension:
basename = os.path.splitext(basename)[0]
basename = re.sub(r"[-_]", " ", basename)
tokens = ["AXHypertext: Basename for link", obj, f"is '{basename}'"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return basename
@staticmethod
def get_child_at_offset(obj, offset):
"""Returns the embedded-object child of obj at the specified offset."""
if not AXObject.supports_hypertext(obj):
return None
try:
index = Atspi.Hypertext.get_link_index(obj, offset)
except Exception as error:
msg = f"AXHypertext: Exception in get_child_at_offset: {error}"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return None
if index < 0:
return None
link = AXHypertext._get_link_at_index(obj, index)
if link is None:
return None
try:
child = Atspi.Hyperlink.get_object(link, 0)
except Exception as error:
msg = f"AXHypertext: Exception in get_child_at_offset: {error}"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return None
tokens = [f"AXHypertext: Child at offset {offset} in", obj, "is", child]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return child
@staticmethod
def get_character_offset_in_parent(obj):
"""Returns the offset of the embedded-object obj in the text of its parent."""
if not AXObject.supports_text(AXObject.get_parent(obj)):
return -1
return AXHypertext.get_link_start_offset(obj)
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