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import pyatspi
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import Gio
from string import Template
from window import CaribouWindowEntry, Rectangle
from keyboard import CaribouKeyboard
from caribou.common.settings_manager import SettingsManager
from caribou.ui.i18n import _
import caribou.common.const as const
from scan import ScanMaster
debug = False
CSS_TEMPLATE = """
.caribou-keyboard-button {
background-image: none;
background-color: $normal_bg;
}
.caribou-keyboard-button:hover {
background-image: none;
background-color: $mouseover_bg;
}
"""
SCAN_CSS_TEMPLATE = """
.caribou-scan-key {
background-image: none;
background-color: $button_scan;
}
.caribou-scan-row {
background-image: none;
background-color: $row_scan;
}
.caribou-scan-block {
background-image: none;
background-color: $block_scan;
}
.caribou-scan-cancel {
background-image: none;
background-color: $cancel_scan;
}
"""
class Caribou:
def __init__(self,
kb_factory=CaribouKeyboard,
window_factory=CaribouWindowEntry):
if not self._get_a11y_enabled():
raise Exception, "AT-SPI 1 or 2 needs to be enabled."
self.__current_acc = None
self.window_factory = window_factory
self.kb_factory = kb_factory
kb = kb_factory()
self.window = window_factory(kb)
self._register_event_listeners()
SettingsManager.layout.connect("value-changed",
self._on_layout_changed)
# Scanning
self.scan_master = ScanMaster(self.window, kb)
SettingsManager.scan_enabled.connect("value-changed",
self._on_scan_toggled)
if SettingsManager.scan_enabled.value:
self.scan_master.start()
self._custom_css_provider = Gtk.CssProvider()
for name in ["normal_color", "mouse_over_color", "default_colors"]:
getattr(SettingsManager, name).connect("value-changed",
self._colors_changed)
self._colors_changed(None, None)
self._scan_css_provider = Gtk.CssProvider()
Gtk.StyleContext.add_provider_for_screen(
Gdk.Screen.get_default(),
self._scan_css_provider,
Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
for name in ["button_scanning_color",
"row_scanning_color",
"block_scanning_color",
"cancel_scanning_color"]:
getattr(SettingsManager, name).connect("value-changed",
self._scan_colors_changed)
self._scan_colors_changed(None, None)
def _colors_changed(self, setting, value):
if SettingsManager.default_colors.value:
Gtk.StyleContext.remove_provider_for_screen(
Gdk.Screen.get_default(),
self._custom_css_provider)
else:
Gtk.StyleContext.add_provider_for_screen(
Gdk.Screen.get_default(),
self._custom_css_provider,
Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
self._custom_css_provider.load_from_data(
Template(CSS_TEMPLATE).substitute(
normal_bg=SettingsManager.normal_color.value,
mouseover_bg=SettingsManager.mouse_over_color.value), -1)
def _scan_colors_changed(self, setting, value):
self._scan_css_provider.load_from_data(Template(SCAN_CSS_TEMPLATE).substitute(
button_scan=SettingsManager.button_scanning_color.value,
row_scan=SettingsManager.row_scanning_color.value,
block_scan=SettingsManager.block_scanning_color.value,
cancel_scan=SettingsManager.cancel_scanning_color.value), -1)
def _register_event_listeners(self):
pyatspi.Registry.registerEventListener(
self.on_focus, "object:state-changed:focused")
pyatspi.Registry.registerEventListener(self.on_focus, "focus")
pyatspi.Registry.registerEventListener(
self.on_text_caret_moved, "object:text-caret-moved")
def _deregister_event_listeners(self):
pyatspi.Registry.deregisterEventListener(
self.on_focus, "object:state-changed:focused")
pyatspi.Registry.deregisterEventListener(self.on_focus, "focus")
pyatspi.Registry.deregisterEventListener(
self.on_text_caret_moved, "object:text-caret-moved")
def _on_scan_toggled(self, setting, val):
if val:
self.scan_master.start()
else:
self.scan_master.stop()
def _on_layout_changed(self, setting, val):
self._deregister_event_listeners()
self.window.destroy()
self._update_window()
self._register_event_listeners()
def _update_window(self):
kb = self.kb_factory()
self.scan_master.set_keyboard(kb)
self.window = self.window_factory(kb)
def _get_a11y_enabled(self):
try:
try:
settings = Gio.Settings('org.gnome.desktop.interface')
atspi = settings.get_boolean("toolkit-accessibility")
print "->", atspi
return atspi
except:
raise
from gi.repository import GConf
gconfc = GConf.Client.get_default()
atspi1 = gconfc.get_bool(
"/desktop/gnome/interface/accessibility")
atspi2 = gconfc.get_bool(
"/desktop/gnome/interface/accessibility2")
return atspi1 or atspi2
except:
raise
return False
def on_text_caret_moved(self, event):
if self.__current_acc == event.source:
self.__set_location(event.source)
if debug == True:
print "object:text-caret-moved in", event.host_application.name,
print event.detail1, event.source.description
def __set_text_location(self, acc):
text = acc.queryText()
[x, y, width, height] = text.getCharacterExtents(text.caretOffset, pyatspi.DESKTOP_COORDS)
self.window.set_cursor_location(Rectangle(x, y, width, height))
component = acc.queryComponent()
entry_bb = component.getExtents(pyatspi.DESKTOP_COORDS)
self.window.set_entry_location(entry_bb)
self.window.show_all()
def __set_entry_location(self, acc):
text = acc.queryText()
cursor_bb = Rectangle(
*text.getCharacterExtents(text.caretOffset,
pyatspi.DESKTOP_COORDS))
component = acc.queryComponent()
entry_bb = component.getExtents(pyatspi.DESKTOP_COORDS)
if cursor_bb == Rectangle(0, 0, 0, 0):
cursor_bb = entry_bb
self.window.set_cursor_location(cursor_bb)
self.window.set_entry_location(entry_bb)
self.window.show_all()
def on_focus(self, event):
acc = event.source
source_role = acc.getRole()
if acc.getState().contains(pyatspi.STATE_EDITABLE) or \
source_role == pyatspi.ROLE_TERMINAL:
if source_role in (pyatspi.ROLE_TEXT,
pyatspi.ROLE_PARAGRAPH,
pyatspi.ROLE_PASSWORD_TEXT,
pyatspi.ROLE_TERMINAL):
if event.type.startswith("focus") or event.detail1 == 1:
self.__set_text_location(acc)
self.__current_acc = event.source
self.__set_location = self.__set_text_location
if debug == True:
print "enter text widget in", event.host_application.name
elif event.detail1 == 0 and acc == self.__current_acc:
self.window.hide()
self.__current_acc = None
self.__set_location = None
if debug == True:
print "leave text widget in", event.host_application.name
elif source_role == pyatspi.ROLE_ENTRY:
if event.type.startswith("focus") or event.detail1 == 1:
self.__set_entry_location(acc)
self.__current_acc = event.source
self.__set_location = self.__set_entry_location
if debug == True:
print "enter entry widget in", event.host_application.name
elif event.detail1 == 0:
self.window.hide()
self.__current_acc = None
self.__set_location = None
if debug == True:
print "leave entry widget in", event.host_application.name
else:
if debug == True:
print _("WARNING - Caribou: unhandled editable widget:"), event.source
# Firefox does not report leave entry widget events.
# This could be a way to get the entry widget leave events.
#else:
# if event.detail1 == 1:
# self.window.hide()
# print "--> LEAVE EDITABLE TEXT <--"
def clean_exit(self):
self.scan_master.stop()
self._deregister_event_listeners()
|
