/usr/lib/python3/dist-packages/Onboard/AutoShow.py is in onboard 1.0.0-0ubuntu4.
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""" GTK specific keyboard class """
from __future__ import division, print_function, unicode_literals
from Onboard.AtspiStateTracker import AtspiStateTracker
from Onboard.utils import Rect, Timer, unicode_str
### Logging ###
import logging
_logger = logging.getLogger("AutoShow")
###############
### Config Singleton ###
from Onboard.Config import Config
config = Config()
########################
class AutoShow(object):
"""
Auto-show and hide Onboard.
"""
# Delay from the last focus event until the keyboard is shown/hidden.
# Raise it to reduce unnecessary transitions (flickering).
# Lower it for more immediate reactions.
SHOW_REACTION_TIME = 0.0
HIDE_REACTION_TIME = 0.3
_lock_visible = False
_frozen = False
_keyboard_widget = None
_state_tracker = AtspiStateTracker()
def __init__(self, keyboard_widget):
self._keyboard_widget = keyboard_widget
self._auto_show_timer = Timer()
self._thaw_timer = Timer()
self._active_accessible = None
def cleanup(self):
self._auto_show_timer.stop()
self._thaw_timer.stop()
def enable(self, enable):
if enable:
self._state_tracker.connect("text-entry-activated",
self._on_text_entry_activated)
self._state_tracker.connect("text-caret-moved",
self._on_text_caret_moved)
else:
self._state_tracker.disconnect("text-entry-activated",
self._on_text_entry_activated)
self._state_tracker.disconnect("text-caret-moved",
self._on_text_caret_moved)
if enable:
self._lock_visible = False
self._frozen = False
def is_frozen(self):
return self._frozen
def freeze(self, thaw_time = None):
"""
Stop showing and hiding the keyboard window.
thaw_time in seconds, None to freeze forever.
"""
self._frozen = True
self._thaw_timer.stop()
if not thaw_time is None:
self._thaw_timer.start(thaw_time, self._on_thaw)
# Discard pending hide/show actions.
self._auto_show_timer.stop()
def thaw(self, thaw_time = None):
"""
Allow hiding and showing the keyboard window again.
thaw_time in seconds, None to thaw immediately.
"""
self._thaw_timer.stop()
if thaw_time is None:
self._thaw()
else:
self._thaw_timer.start(thaw_time, self._on_thaw)
def _on_thaw(self):
self._thaw_timer.stop()
self._frozen = False
return False
def lock_visible(self, lock, thaw_time = 1.0):
"""
Lock window permanetly visible in response to the user showing it.
Optionally freeze hiding/showing for a limited time.
"""
# Permanently lock visible.
self._lock_visible = lock
# Temporarily stop showing/hiding.
if thaw_time:
self.freeze(thaw_time)
# Leave the window in its current state,
# discard pending hide/show actions.
self._auto_show_timer.stop()
# Stop pending auto-repositioning
if lock:
window = self._keyboard_widget.get_kbd_window()
if window:
window.stop_auto_position()
def _on_text_caret_moved(self, event):
"""
Show the keyboard on click of an already focused text entry
(LP: 1078602). Do this only for single line text entries to
still allow clicking longer documents without having onboard show up.
"""
if config.auto_show.enabled and \
not self._keyboard_widget.is_visible():
accessible = self._active_accessible
if accessible:
if self._state_tracker.is_single_line():
self._on_text_entry_activated(accessible)
def _on_text_entry_activated(self, accessible):
window = self._keyboard_widget.get_kbd_window()
self._active_accessible = accessible
active = bool(accessible)
# show/hide the keyboard window
if not active is None:
# Always allow to show the window even when locked.
# Mitigates right click on unity-2d launcher hiding
# onboard before _lock_visible is set (Precise).
if self._lock_visible:
active = True
if not self.is_frozen():
self.show_keyboard(active)
# The active accessible changed, stop trying to
# track the position of the previous one.
# -> less erratic movement during quick focus changes
if window:
window.stop_auto_position()
# reposition the keyboard window
if active and \
not accessible is None and \
not self._lock_visible and \
not self.is_frozen():
if window:
window.auto_position()
def show_keyboard(self, show):
""" Begin AUTO_SHOW or AUTO_HIDE transition """
# Don't act on each and every focus message. Delay the start
# of the transition slightly so that only the last of a bunch of
# focus messages is acted on.
delay = self.SHOW_REACTION_TIME if show else \
self.HIDE_REACTION_TIME
self._auto_show_timer.start(delay, self._begin_transition, show)
def _begin_transition(self, show):
self._keyboard_widget.transition_visible_to(show)
self._keyboard_widget.commit_transition()
return False
def get_repositioned_window_rect(self, home, limit_rects,
test_clearance, move_clearance,
horizontal = True, vertical = True):
"""
Get the alternative window rect suggested by auto-show or None if
no repositioning is required.
"""
accessible = self._active_accessible
if accessible:
rect = self._state_tracker.get_accessible_extents(accessible)
if not rect.is_empty() and \
not self._lock_visible:
return self._get_window_rect_for_accessible_rect( \
home, rect, limit_rects,
test_clearance, move_clearance,
horizontal, vertical)
return None
def _get_window_rect_for_accessible_rect(self, home, rect, limit_rects,
test_clearance, move_clearance,
horizontal = True, vertical = True):
"""
Find new window position based on the screen rect of the accessible.
"""
mode = "nooverlap"
x = y = None
if mode == "closest":
x, y = rect.left(), rect.bottom()
if mode == "nooverlap":
x, y = self._find_non_occluding_position(home, rect, limit_rects,
test_clearance, move_clearance,
horizontal, vertical)
if not x is None:
return Rect(x, y, home.w, home.h)
else:
return None
def _find_non_occluding_position(self, home, acc_rect, limit_rects,
test_clearance, move_clearance,
horizontal = True, vertical = True):
# The home_rect doesn't include window decoration,
# make sure to add decoration for correct clearance.
rh = home.copy()
window = self._keyboard_widget.get_kbd_window()
if window:
offset = window.get_client_offset()
rh.w += offset[0]
rh.h += offset[1]
# Leave some clearance around the accessible to account for
# window frames and position errors of firefox entries.
ra = acc_rect.apply_border(*test_clearance)
if rh.intersects(ra):
# Leave a different clearance for the new to be found positions.
ra = acc_rect.apply_border(*move_clearance)
x, y = rh.get_position()
# candidate positions
vp = []
if horizontal:
vp.append([ra.left() - rh.w, y])
vp.append([ra.right(), y])
if vertical:
vp.append([x, ra.top() - rh.h])
vp.append([x, ra.bottom()])
# limited, non-intersecting candidate rectangles
vr = []
for p in vp:
pl = self._keyboard_widget.limit_position( p[0], p[1],
self._keyboard_widget.canvas_rect,
limit_rects)
r = Rect(pl[0], pl[1], rh.w, rh.h)
if not r.intersects(ra):
vr.append(r)
# candidate with smallest center-to-center distance wins
chx, chy = rh.get_center()
dmin = None
rmin = None
for r in vr:
cx, cy = r.get_center()
dx, dy = cx - chx, cy - chy
d2 = dx * dx + dy * dy
if dmin is None or dmin > d2:
dmin = d2
rmin = r
if not rmin is None:
return rmin.get_position()
return None, None
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