Current File : //usr/lib/python3/dist-packages/orca/mouse_review.py
# Mouse reviewer for Orca
#
# Copyright 2008 Eitan Isaacson
# Copyright 2016 Igalia, S.L.
#
# 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.
"""Mouse review mode."""
__id__ = "$Id$"
__version__ = "$Revision$"
__date__ = "$Date$"
__copyright__ = "Copyright (c) 2008 Eitan Isaacson" \
"Copyright (c) 2016 Igalia, S.L."
__license__ = "LGPL"
import math
import time
from collections import deque
import gi
gi.require_version("Atspi", "2.0")
from gi.repository import Atspi
from gi.repository import GLib
try:
gi.require_version("Wnck", "3.0")
from gi.repository import Wnck
_mouseReviewCapable = True
except Exception:
_mouseReviewCapable = False
from . import cmdnames
from . import debug
from . import focus_manager
from . import keybindings
from . import input_event
from . import messages
from . import script_manager
from . import settings_manager
from .ax_component import AXComponent
from .ax_object import AXObject
from .ax_text import AXText
from .ax_utilities import AXUtilities
class _StringContext:
"""The textual information associated with an _ItemContext."""
def __init__(self, obj, script=None, string="", start=0, end=0):
"""Initialize the _StringContext.
Arguments:
- string: The human-consumable string
- obj: The accessible object associated with this string
- start: The start offset with respect to entire text, if one exists
- end: The end offset with respect to the entire text, if one exists
- script: The script associated with the accessible object
"""
self._obj = obj
self._script = script
self._string = string
self._start = start
self._end = end
self._rect = AXText.get_range_rect(obj, start, end)
def __eq__(self, other):
return other is not None \
and self._obj == other._obj \
and self._string == other._string \
and self._start == other._start \
and self._end == other._end
def isSubstringOf(self, other):
"""Returns True if this is a substring of other."""
if other is None:
return False
if not (self._obj and other._obj):
return False
thisBox = self.getBoundingBox()
if thisBox == (0, 0, 0, 0):
return False
otherBox = other.getBoundingBox()
if otherBox == (0, 0, 0, 0):
return False
# We get various and sundry results for the bounding box if the implementor
# included newline characters as part of the word or line at offset. Try to
# detect this and adjust the bounding boxes before getting the intersection.
if thisBox[3] != otherBox[3] and self._obj == other._obj:
thisNewLineCount = self._string.count("\n")
if thisNewLineCount and thisBox[3] / thisNewLineCount == otherBox[3]:
thisBox = *thisBox[0:3], otherBox[3]
thisRect = Atspi.Rect()
thisRect.x, thisRect.y, thisRect.width, thisRect.height = thisBox
otherRect = Atspi.Rect()
otherRect.x, otherRect.y, otherRect.width, otherRect.height = otherBox
if AXComponent.get_rect_intersection(thisRect, otherRect) != thisRect:
return False
if not (self._string and self._string.strip() in other._string):
return False
tokens = ["MOUSE REVIEW: '", self._string, "' is substring of '", other._string, "'"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return True
def getBoundingBox(self):
"""Returns the bounding box associated with this context's range."""
return self._rect.x, self._rect.y, self._rect.width, self._rect.height
def getString(self):
"""Returns the string associated with this context."""
return self._string
def present(self):
"""Presents this context to the user."""
if not self._script:
msg = "MOUSE REVIEW: Not presenting due to lack of script"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return False
if not self._string:
msg = "MOUSE REVIEW: Not presenting due to lack of string"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return False
voice = self._script.speechGenerator.voice(obj=self._obj, string=self._string)
string = self._script.utilities.adjustForRepeats(self._string)
focus_manager.getManager().emit_region_changed(
self._obj, self._start, self._end, focus_manager.MOUSE_REVIEW)
self._script.speakMessage(string, voice=voice, interrupt=False)
self._script.displayBrailleMessage(self._string, -1)
return True
class _ItemContext:
"""Holds all the information of the item at a specified point."""
def __init__(self, x=0, y=0, obj=None, boundary=None, frame=None, script=None):
"""Initialize the _ItemContext.
Arguments:
- x: The X coordinate
- y: The Y coordinate
- obj: The accessible object of interest at that coordinate
- boundary: The accessible-text boundary type
- frame: The containing accessible object (often a top-level window)
- script: The script associated with the accessible object
"""
self._x = x
self._y = y
self._obj = obj
self._boundary = boundary
self._frame = frame
self._script = script
self._string = self._getStringContext()
self._time = time.time()
self._rect = AXComponent.get_rect(obj)
def __eq__(self, other):
return other is not None \
and self._frame == other._frame \
and self._obj == other._obj \
and self._string == other._string
def _treatAsDuplicate(self, prior):
if self._obj != prior._obj or self._frame != prior._frame:
msg = "MOUSE REVIEW: Not a duplicate: different objects"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return False
if self.getString() and prior.getString() and not self._isSubstringOf(prior):
msg = "MOUSE REVIEW: Not a duplicate: not a substring of"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return False
if self._x == prior._x and self._y == prior._y:
msg = "MOUSE REVIEW: Treating as duplicate: mouse didn't move"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return True
interval = self._time - prior._time
if interval > 0.5:
msg = f"MOUSE REVIEW: Not a duplicate: was {interval:.2f}s ago"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return False
msg = "MOUSE REVIEW: Treating as duplicate"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return True
def _treatAsSingleObject(self):
return AXText.is_whitespace_or_empty(self._obj)
def _getStringContext(self):
"""Returns the _StringContext associated with the specified point."""
if not (self._script and self._obj):
return _StringContext(self._obj)
if self._treatAsSingleObject():
return _StringContext(self._obj, self._script)
try:
string, start, end = self._script.utilities.textAtPoint(
self._obj, self._x, self._y, self._boundary)
except Exception as error:
msg = f"MOUSE REVIEW: Exception getting text at point: {error}"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return _StringContext(self._obj, self._script)
if string:
string = self._script.utilities.expandEOCs(self._obj, start, end)
return _StringContext(self._obj, self._script, string, start, end)
def _getContainer(self):
roles = [Atspi.Role.DIALOG,
Atspi.Role.FRAME,
Atspi.Role.LAYERED_PANE,
Atspi.Role.MENU,
Atspi.Role.PAGE_TAB,
Atspi.Role.TOOL_BAR,
Atspi.Role.WINDOW]
return AXObject.find_ancestor(self._obj, lambda x: AXObject.get_role(x) in roles)
def _isSubstringOf(self, other):
"""Returns True if this is a substring of other."""
return self._string.isSubstringOf(other._string)
def getObject(self):
"""Returns the accessible object associated with this context."""
return self._obj
def getBoundingBox(self):
"""Returns the bounding box associated with this context."""
x, y, width, height = self._string.getBoundingBox()
if not (width or height):
return self._rect.x, self._rect.y, self._rect.width, self._rect.height
return x, y, width, height
def getString(self):
"""Returns the string associated with this context."""
return self._string.getString()
def getTime(self):
"""Returns the time associated with this context."""
return self._time
def _isInlineChild(self, prior):
if not self._obj or not prior._obj:
return False
if AXObject.get_parent(prior._obj) != self._obj:
return False
if self._treatAsSingleObject():
return False
return AXUtilities.is_link(prior._obj)
def present(self, prior):
"""Presents this context to the user."""
if self == prior or self._treatAsDuplicate(prior):
msg = "MOUSE REVIEW: Not presenting due to no change"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return False
interrupt = self._obj and self._obj != prior._obj \
or math.sqrt((self._x - prior._x)**2 + (self._y - prior._y)**2) > 25
if interrupt:
self._script.presentationInterrupt()
if self._frame and self._frame != prior._frame:
self._script.presentObject(self._frame,
alreadyFocused=True,
inMouseReview=True,
interrupt=True)
if not self._script.utilities.hasPresentableText(self._obj):
msg = "MOUSE REVIEW: Not presenting object which lacks presentable text."
debug.printMessage(debug.LEVEL_INFO, msg, True)
return False
if self._obj and self._obj != prior._obj and not self._isInlineChild(prior):
priorObj = prior._obj or self._getContainer()
focus_manager.getManager().emit_region_changed(
self._obj, mode=focus_manager.MOUSE_REVIEW)
self._script.presentObject(self._obj, priorObj=priorObj, inMouseReview=True)
if self._string.getString() == AXObject.get_name(self._obj):
return True
if not self._script.utilities.isEditableTextArea(self._obj):
return True
if AXUtilities.is_table_cell(self._obj) \
and self._string.getString() == self._script.utilities.displayedText(self._obj):
return True
if self._string != prior._string and self._string.present():
return True
return True
class MouseReviewer:
"""Main class for the mouse-review feature."""
def __init__(self):
self._active = settings_manager.getManager().getSetting("enableMouseReview")
self._currentMouseOver = _ItemContext()
self._workspace = None
self._windows = []
self._all_windows = []
self._handlerIds = {}
self._eventListener = Atspi.EventListener.new(self._listener)
self.inMouseEvent = False
self._event_queue = deque()
self._handlers = self.get_handlers(True)
self._bindings = keybindings.KeyBindings()
if not _mouseReviewCapable:
msg = "MOUSE REVIEW ERROR: Wnck is not available"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return
if not self._active:
return
self.activate()
def get_bindings(self, refresh=False, is_desktop=True):
"""Returns the mouse-review keybindings."""
if refresh:
msg = "MOUSE REVIEW: Refreshing bindings."
debug.printMessage(debug.LEVEL_INFO, msg, True)
self._setup_bindings()
elif self._bindings.isEmpty():
self._setup_bindings()
return self._bindings
def get_handlers(self, refresh=False):
"""Returns the mouse-review handlers."""
if refresh:
msg = "MOUSE REVIEW: Refreshing handlers."
debug.printMessage(debug.LEVEL_INFO, msg, True)
self._setup_handlers()
return self._handlers
def _setup_handlers(self):
"""Sets up the mouse-review input event handlers."""
self._handlers = {}
self._handlers["toggleMouseReviewHandler"] = \
input_event.InputEventHandler(
self.toggle,
cmdnames.MOUSE_REVIEW_TOGGLE)
msg = "MOUSE REVIEW: Handlers set up."
debug.printMessage(debug.LEVEL_INFO, msg, True)
def _setup_bindings(self):
"""Sets up the mouse-review key bindings."""
self._bindings = keybindings.KeyBindings()
self._bindings.add(
keybindings.KeyBinding(
"",
keybindings.defaultModifierMask,
keybindings.NO_MODIFIER_MASK,
self._handlers.get("toggleMouseReviewHandler")))
msg = "MOUSE REVIEW: Bindings set up."
debug.printMessage(debug.LEVEL_INFO, msg, True)
def activate(self):
"""Activates mouse review."""
if not _mouseReviewCapable:
msg = "MOUSE REVIEW ERROR: Wnck is not available"
debug.printMessage(debug.LEVEL_INFO, msg, True)
return
# Set up the initial object as the one with the focus to avoid
# presenting irrelevant info the first time.
obj = focus_manager.getManager().get_locus_of_focus()
script = None
frame = None
if obj:
script = script_manager.getManager().getScript(AXObject.get_application(obj), obj)
if script:
frame = script.utilities.topLevelObject(obj)
self._currentMouseOver = _ItemContext(obj=obj, frame=frame, script=script)
self._eventListener.register("mouse:abs")
screen = Wnck.Screen.get_default()
if screen:
# On first startup windows and workspace are likely to be None,
# but the signals we connect to will get emitted when proper values
# become available; but in case we got disabled and re-enabled we
# have to get the initial values manually.
stacked = screen.get_windows_stacked()
if stacked:
stacked.reverse()
self._all_windows = stacked
self._workspace = screen.get_active_workspace()
if self._workspace:
self._update_workspace_windows()
i = screen.connect("window-stacking-changed", self._on_stacking_changed)
self._handlerIds[i] = screen
i = screen.connect("active-workspace-changed", self._on_workspace_changed)
self._handlerIds[i] = screen
self._active = True
def deactivate(self):
"""Deactivates mouse review."""
self._eventListener.deregister("mouse:abs")
for key, value in self._handlerIds.items():
value.disconnect(key)
self._handlerIds = {}
self._workspace = None
self._windows = []
self._all_windows = []
self._event_queue.clear()
self._active = False
def getCurrentItem(self):
"""Returns the accessible object being reviewed."""
if not _mouseReviewCapable:
return None
if not self._active:
return None
obj = self._currentMouseOver.getObject()
if time.time() - self._currentMouseOver.getTime() > 0.1:
tokens = ["MOUSE REVIEW: Treating", obj, "as stale"]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return None
return obj
def toggle(self, script=None, event=None):
"""Toggle mouse reviewing on or off."""
if not _mouseReviewCapable:
return
self._active = not self._active
settings_manager.getManager().setSetting("enableMouseReview", self._active)
if not self._active:
self.deactivate()
msg = messages.MOUSE_REVIEW_DISABLED
else:
self.activate()
msg = messages.MOUSE_REVIEW_ENABLED
script = script_manager.getManager().getActiveScript()
if script is not None:
script.presentMessage(msg)
def _update_workspace_windows(self):
self._windows = [w for w in self._all_windows
if w.is_on_workspace(self._workspace)]
def _on_stacking_changed(self, screen):
"""Callback for Wnck's window-stacking-changed signal."""
stacked = screen.get_windows_stacked()
stacked.reverse()
self._all_windows = stacked
if self._workspace:
self._update_workspace_windows()
def _on_workspace_changed(self, screen, prev_ws=None):
"""Callback for Wnck's active-workspace-changed signal."""
self._workspace = screen.get_active_workspace()
self._update_workspace_windows()
def _accessible_window_at_point(self, pX, pY):
"""Returns the accessible window and window based coordinates for the screen coordinates."""
window = None
for w in self._windows:
if w.is_minimized():
continue
x, y, width, height = w.get_client_window_geometry()
if x <= pX <= x + width and y <= pY <= y + height:
window = w
break
if not window:
return None, -1, -1
windowApp = window.get_application()
if not windowApp:
return None, -1, -1
app = AXUtilities.get_application_with_pid(windowApp.get_pid())
if not app:
return None, -1, -1
# Adjust the pointer screen coordinates to be relative to the window. This is
# needed because we won't be able to get the screen coordinates in Wayland.
relativeX = pX - x
relativeY = pY - y
candidates = [o for o in AXObject.iter_children(
app, lambda x: AXComponent.object_contains_point(x, relativeX, relativeY))]
if len(candidates) == 1:
return candidates[0], relativeX, relativeY
name = window.get_name()
matches = [o for o in candidates if AXObject.get_name(o) == name]
if len(matches) == 1:
return matches[0], relativeX, relativeY
matches = [o for o in matches if AXUtilities.is_active(o)]
if len(matches) == 1:
return matches[0], relativeX, relativeY
return None, -1, -1
def _on_mouse_moved(self, event):
"""Callback for mouse:abs events."""
pX, pY = event.detail1, event.detail2
window, windowX, windowY = self._accessible_window_at_point(pX, pY)
tokens = [f"MOUSE REVIEW: Window at ({pX}, {pY}) is", window]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
if not window:
return
script = script_manager.getManager().getScript(AXObject.get_application(window))
if not script:
return
focus = focus_manager.getManager().get_locus_of_focus()
if AXObject.is_dead(focus):
menu = None
elif AXUtilities.is_menu(focus):
menu = focus
else:
menu = AXObject.find_ancestor(focus, AXUtilities.is_menu)
obj = None
if menu:
obj = AXComponent.get_descendant_at_point(menu, windowX, windowY)
tokens = ["MOUSE REVIEW: Object in", menu, f"at ({windowX}, {windowY}) is", obj]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
if obj is None:
obj = AXComponent.get_descendant_at_point(window, windowX, windowY)
tokens = ["MOUSE REVIEW: Object in", window, f"at ({windowX}, {windowY}) is", obj]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
script = script_manager.getManager().getScript(AXObject.get_application(window), obj)
if menu and obj and not AXObject.find_ancestor(obj, AXUtilities.is_menu):
if AXComponent.objects_overlap(obj, menu):
tokens = ["MOUSE REVIEW:", obj, "believed to be under", menu]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return
objDocument = script.utilities.getTopLevelDocumentForObject(obj)
if objDocument and script.utilities.inDocumentContent():
document = script.utilities.activeDocument()
if document != objDocument:
tokens = ["MOUSE REVIEW:", obj, "is not in active document", document]
debug.printTokens(debug.LEVEL_INFO, tokens, True)
return
boundary = None
x, y, width, height = self._currentMouseOver.getBoundingBox()
if y <= windowY <= y + height and self._currentMouseOver.getString():
boundary = Atspi.TextBoundaryType.WORD_START
elif obj == self._currentMouseOver.getObject():
boundary = Atspi.TextBoundaryType.LINE_START
elif AXUtilities.is_selectable(obj):
boundary = Atspi.TextBoundaryType.LINE_START
elif script.utilities.isMultiParagraphObject(obj):
boundary = Atspi.TextBoundaryType.LINE_START
if len(self._event_queue):
msg = "MOUSE REVIEW: Mouse moved again."
debug.printMessage(debug.LEVEL_INFO, msg, True)
return
new = _ItemContext(windowX, windowY, obj, boundary, window, script)
if new.present(self._currentMouseOver):
self._currentMouseOver = new
def _process_event(self):
if not self._event_queue:
return
event = self._event_queue.popleft()
if len(self._event_queue):
return
startTime = time.time()
tokens = ["\nvvvvv PROCESS OBJECT EVENT", event.type, "vvvvv"]
debug.printTokens(debug.LEVEL_INFO, tokens, False)
self.inMouseEvent = True
self._on_mouse_moved(event)
self.inMouseEvent = False
msg = f"TOTAL PROCESSING TIME: {time.time() - startTime:.4f}\n"
msg += f"^^^^^ PROCESS OBJECT EVENT {event.type} ^^^^^\n"
debug.printMessage(debug.LEVEL_INFO, msg, False)
def _listener(self, event):
"""Generic listener for events of interest."""
if event.type.startswith("mouse:abs"):
self._event_queue.append(event)
GLib.timeout_add(50, self._process_event)
_reviewer = MouseReviewer()
def getReviewer():
return _reviewer
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