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import gobject
import pyatspi
from gi.repository import Gdk
from gi.repository import Gtk
import caribou.common.const as const
from caribou.common.settings_manager import SettingsManager
# Scan constans
BUTTON = 'button'
ROW = 'row'
BLOCK = 'block'
CANCEL = 'cancel'
REVERSE = 'reverse'
MOUSE_SWITCH_TYPE = 'mouse'
KEYBOARD_SWITCH_TYPE = 'keyboard'
KEYBOARD_KEY_LIST = {"Shift R" : "Shift_R",
"Shift L" : "Shift_L",
"Alt Gr" : "ISO_Level3_Shift",
"Num Lock": "Num_Lock"}
DEFAULT_KEYBOARD_KEY = 'Shift R'
DEFAULT_MOUSE_BUTTON = '1'
MIN_STEP_TIME = 50
MAX_STEP_TIME = 5000
TIME_SINGLE_INCREMENT = 1
TIME_MULTI_INCREMENT = 10
DEFAULT_STEP_TIME = 1000
DEFAULT_SCANNING_TYPE = ROW
DEFAULT_SWITCH_TYPE = KEYBOARD_SWITCH_TYPE
class ScanService():
def __init__(self, keyboard, root_window):
self.keyboard = keyboard
self.root_window = root_window
self.selected_row = None
self.selected_button = None
self.button_index = 0
self.row_index = 0
self.index_i = 0
self.index_j = 0
self.is_stop = True
self.timerid = None
self.reverse = False
self.selected_block = []
# Settings we are interested in.
for name in ["step_time", "reverse_scanning", "scanning_type"]:
getattr(SettingsManager, name).connect("value-changed",
self._on_switch_changed)
for name in ["switch_type", "mouse_button", "keyboard_key"]:
getattr(SettingsManager, name).connect("value-changed",
self._on_switch_changed)
for name in ["default_colors", "normal_color", "mouse_over_color",
"row_scanning_color", "button_scanning_color",
"cancel_scanning_color", "block_scanning_color"]:
getattr(SettingsManager, name).connect("value-changed",
self._on_color_changed)
SettingsManager.scan_enabled.connect("value-changed",
self._on_scan_toggled)
self._configure_scanning()
self._set_colors()
self._configure_switch()
def destroy(self):
self.stop()
self.clean()
self._deregister_events()
def _configure_switch(self):
self.switch_type = SettingsManager.switch_type.value
if self.switch_type == MOUSE_SWITCH_TYPE:
self.switch_key = SettingsManager.mouse_button.value
elif self.switch_type == KEYBOARD_SWITCH_TYPE:
self.switch_key = SettingsManager.keyboard_key
try:
pyatspi.Registry.registerKeystrokeListener(self._on_key_pressed,
mask=None, kind=(pyatspi.KEY_PRESSED_EVENT,))
pyatspi.Registry.registerKeystrokeListener(self._on_key_released,
mask=None, kind=(pyatspi.KEY_RELEASED_EVENT,))
except:
print "Error while registering keyboard events in scan.py"
def _deregister_events(self):
try:
pyatspi.Registry.deregisterKeystrokeListener(self._on_key_pressed,
mask=None, kind=pyatspi.KEY_PRESSED_EVENT)
pyatspi.Registry.deregisterKeystrokeListener(
self._on_key_released,
mask=None, kind=pyatspi.KEY_RELEASED_EVENT)
except:
print "Error while deregistering keyboard events in scan.py"
def _on_switch_changed(self, settings, val):
self._deregister_events()
self._configure_switch()
def _on_scan_toggled(self, settings, val):
if val:
self.start()
else:
self.stop()
def _on_color_changed(self, settings, val):
self._set_colors()
def _on_scanning_type_changed(self, settings, val):
self._configure_scanning()
def _configure_scanning(self):
if not self.is_stop:
self._stop()
self.scanning_type = SettingsManager.scanning_type.value
self.reverse = SettingsManager.reverse_scanning.value
self.step_time = SettingsManager.step_time.value
if self.scanning_type == BLOCK:
self.selected_block = []
else:
self.selected_block = self.keyboard
self.scanning = self.scanning_type
def _set_colors(self):
self.default_colors = SettingsManager.default_colors.value
self.normal_color = SettingsManager.normal_color.value
self.mouse_over_color = SettingsManager.mouse_over_color.value
self.row_scanning_color = SettingsManager.row_scanning_color.value
self.button_scanning_color = \
SettingsManager.button_scanning_color.value
self.cancel_scanning_color = \
SettingsManager.cancel_scanning_color.value
self.block_scanning_color = SettingsManager.block_scanning_color.value
# public start
def start(self, scanning=None):
self.scanning = scanning or self.scanning_type
self.clean()
if self.root_window and \
self.switch_type == MOUSE_SWITCH_TYPE:
self._grab_mouse_events()
if not self.reverse:
self.reset(self.scanning)
# public stop
def stop(self):
if self.switch_type == MOUSE_SWITCH_TYPE:
self._ungrab_mouse_events()
self.clean()
self._stop()
#private start
def _start(self, scanning=ROW):
if self.is_stop == True and self.timerid == None:
self.is_stop = False
self.button_index = -1
self.row_index = -1
if scanning == ROW:
self.selected_row = []
self.timerid = gobject.timeout_add(
int(1000*self.step_time), self._scan_row)
elif scanning == BUTTON:
self.selected_button = None
self.timerid = gobject.timeout_add(
int(1000*self.step_time), self._scan_button)
elif scanning == BLOCK:
self.selected_block = []
self.selected_row = []
self.clean()
self.index_i = 2
self.index_j = 1
self.timerid = gobject.timeout_add(
int(1000*self.step_time), self._scan_block)
# private stop
def _stop(self):
self.is_stop = True
if self.timerid:
gobject.source_remove(self.timerid)
self.timerid = None
def reset(self, scanning=ROW):
self._stop()
self._start(scanning)
def clean(self):
for row in self.keyboard:
for button in row:
self.select_button(button, False)
def change_keyboard(self, keyboard):
if not self.is_stop:
self._stop()
self.keyboard = keyboard
self.scanning = self.scanning_type
self.start(self.scanning_type)
if self.scanning == ROW:
self.selected_block = keyboard
def _grab_mouse_events(self):
Gdk.event_handler_set(self._mouse_handler)
def _ungrab_mouse_events(self):
Gdk.event_handler_set(Gtk.main_do_event)
def _mouse_handler(self, event):
if self.root_window.window.is_visible():
if event.type == Gdk.EventType.BUTTON_PRESS and \
str(event.button) == self.switch_key.value:
self._handle_press()
elif event.type == Gdk.BUTTON_RELEASE and \
str(event.button) == self.switch_key.value:
self._handle_release()
elif not event.type == Gdk.ENTER_NOTIFY:
Gtk.main_do_event(event)
else:
Gtk.main_do_event(event)
def _scan_block(self):
if self.is_stop:
return False
# Clean the previous block
self.select_block(self.selected_block, False)
# Update indexes, three horizontal blocks, and two vertical
if self.index_j < 2:
self.index_j += 1
elif self.index_i < 1:
self.index_i += 1
self.index_j = 0
else:
self.index_j = 0
self.index_i = 0
self.selected_block = []
#width = self.root_window.size_request()[0]
#height = self.root_window.size_request()[1]
root_x = self.root_window.get_position()[0]
root_y = self.root_window.get_position()[1]
offset_w = self.index_j*(width/3)
offset_h = self.index_i*(height/2)
block_window = (root_x + offset_w,
root_y + offset_h,
width/3,
height/2)
empty_r = ()
try:
for row in self.keyboard:
line = []
for button in row:
abs_b_x = button.get_allocation()[0] + \
button.window.get_position()[0]
abs_b_y = button.get_allocation()[1] + \
button.window.get_position()[1]
abs_b_r = (abs_b_x,
abs_b_y,
button.size_request()[0],
button.size_request()[1])
# If button rectangle is inside the block:
intersect = block_window.intersect(abs_b_r)
# If the intersected rectangle != empty
if intersect != empty_r:
# If the witdth of intersection is bigger than half
# of button width and height, we append button to line
if (intersect.width > (abs_b_r.width / 2)) and \
(intersect.height > (abs_b_r.height / 2)):
line.append(button)
if len(line) > 0:
self.selected_block.append(line)
except Exception as e:
self.is_stop = True
return False
self.select_block(self.selected_block, True,
self.block_scanning_color)
return True
def _scan_row(self):
if self.is_stop:
return False
else:
self.select_row(self.selected_row,
self.scanning_type == BLOCK,
self.block_scanning_color)
self.row_index += 1
if self.row_index >= len(self.selected_block):
self.row_index = 0
self.selected_row = self.selected_block[self.row_index]
self.select_row(self.selected_row, True, self.row_scanning_color)
return True
def _scan_button(self):
if self.scanning == CANCEL:
self.scanning = BUTTON
self.selected_button = None
self.select_row(self.selected_row, True, self.row_scanning_color)
return True
else:
if self.selected_button and self.selected_button in self.selected_row:
self.select_button(self.selected_button, True, self.row_scanning_color)
if self.is_stop:
return False
self.button_index += 1
if self.button_index >= len(self.selected_row):
self.select_row(self.selected_row, True, self.cancel_scanning_color)
self.button_index = -1
self.scanning = CANCEL
return True
self.selected_button = self.selected_row[self.button_index]
while self.selected_button.key_type == const.DUMMY_KEY_TYPE:
self.button_index += 1
if self.button_index >= len(self.selected_row):
self.select_row(self.selected_row, True, self.cancel_scanning_color)
self.button_index = -1
self.scanning = CANCEL
return True
self.selected_button = self.selected_row[self.button_index]
self.select_button(self.selected_button, True, self.button_scanning_color)
return True
def select_block(self, block, state, color=None):
for row in block:
self.select_row(row, state, color)
def select_row(self, row, state, color=None):
for button in row:
self.select_button(button, state, color)
def select_button(self, button, state, color=None):
if state:
button.set_color(color, self.mouse_over_color)
elif self.default_colors:
button.reset_color()
else:
button.set_color(self.normal_color,
self.mouse_over_color)
def _on_key_pressed(self, event):
if event.event_string == "Escape":
SettingsManager.scan_enabled.value = False
elif self.switch_type == KEYBOARD_SWITCH_TYPE and \
self.switch_key.value == event.event_string:
self._handle_press()
def _on_key_released(self, event):
if self.switch_type == KEYBOARD_SWITCH_TYPE and \
self.switch_key.value == event.event_string:
self._handle_release()
elif event.event_string != "Escape":
self._stop()
self.start()
def _handle_press(self):
if self.reverse:
self._start(self.scanning)
def _handle_release(self):
if self.reverse:
if not self.is_stop:
if self.scanning == ROW and \
len(self.selected_row) > 0:
self.scanning = BUTTON
elif self.scanning == BLOCK and \
len(self.selected_block) > 0:
self.scanning = ROW
elif self.scanning == BUTTON and \
self.selected_button:
self.clean()
if self.selected_button.key_type == const.PREFERENCES_KEY_TYPE:
self.stop()
self.selected_button.clicked()
self.selected_button = None
self.scanning = self.scanning_type
self.reset()
elif self.scanning == CANCEL:
self.clean()
self.scanning = self.scanning_type
self._stop()
else:
if not self.is_stop:
if self.scanning == ROW and \
len(self.selected_row) > 0:
self.scanning = BUTTON
self.reset(BUTTON)
elif self.scanning == BLOCK and \
len(self.selected_block) > 0:
self.scanning = ROW
self.reset(ROW)
elif self.scanning == BUTTON and \
self.selected_button:
self.selected_button.clicked()
self.scanning = ROW
if self.selected_button.key_type \
== const.PREFERENCES_KEY_TYPE:
self.selected_button = None
self.stop()
else:
self.selected_button = None
self.scanning = self.scanning_type
elif self.scanning == CANCEL:
self.scanning = self.scanning_type
self.clean()
self.reset(self.scanning_type)
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