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# vim:set et sts=4 sw=4:
#
# ibus-sulekha - The Sulekha engine for IBus
#
# Copyright(c) 2009 Santhosh Thottingal <santhosh.thottingal@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
import gobject
import pango
import ibus
import keymap
import autocomplete
from ibus import keysyms
from ibus import modifier
class SulekhaEngine(ibus.EngineBase):
def __init__(self, bus, object_path):
super(SulekhaEngine, self).__init__(bus, object_path)
self.__keymap = keymap.Keymap("swanalekha_ml_IN")
self.__input_method="en_US"
self.__autocomplete=autocomplete.Autocomplete()
self.__is_invalidate = False
self.__preedit_string = u""
self.__current_word = u""
self.__lookup_table = ibus.LookupTable()
self.__prop_list = ibus.PropList()
self.__prop_list.append(ibus.Property(u"test", icon = u"ibus-locale"))
def process_key_event(self, keyval, state):
# ignore key release events
is_press = ((state & modifier.RELEASE_MASK) == 0)
if not is_press:
return False
if self.__preedit_string:
if keyval == keysyms.Return:
if self.__lookup_table.get_number_of_candidates() > 0:
self.__commit_string(self.__lookup_table.get_current_candidate().text)
else:
self.__commit_string(self.__preedit_string)
return True
elif keyval == keysyms.Escape:
self.__preedit_string = u""
self.__update()
return True
elif keyval == keysyms.BackSpace:
self.__preedit_string = self.__preedit_string[:-1]
self.__current_word = self.__current_word[:-1]
self.__invalidate()
return True
elif keyval == keysyms.space:
self.__commit_string(self.__preedit_string)
previous_word=self.__current_word
self.__current_word = u""
self.__update_prediction(previous_word)
return False
elif keyval >= keysyms._1 and keyval <= keysyms._9:
index = keyval - keysyms._1
candidates = self.__lookup_table.get_candidates_in_current_page()
if index >= len(candidates):
return False
candidate = candidates[index].text
self.__commit_string(candidate)
return True
elif keyval == keysyms.Page_Up or keyval == keysyms.KP_Page_Up:
self.page_up()
return True
elif keyval == keysyms.Page_Down or keyval == keysyms.KP_Page_Down:
self.page_down()
return True
elif keyval == keysyms.Up:
self.cursor_up()
return True
elif keyval == keysyms.Down:
self.cursor_down()
return True
elif keyval == keysyms.Left or keyval == keysyms.Right:
return True
if keyval in xrange(keysyms.a, keysyms.z + 1) or \
keyval in xrange(keysyms.A, keysyms.Z + 1):
if state & (modifier.CONTROL_MASK | modifier.ALT_MASK) == 0:
current_string = self.__preedit_string
if self.__input_method == "en_US":
self.__preedit_string += unichr(keyval)
else:
if self.__keymap.get_candidates(current_string+unichr(keyval))== None:
current_list = self.__keymap.get_candidates(current_string)
self.__commit_string(current_list[0])
self.__preedit_string = unichr(keyval)
self.__update()
else:
self.__preedit_string += unichr(keyval)
self.__invalidate()
return True
else:
if keyval < 128 and self.__preedit_string:
self.__commit_string(self.__preedit_string)
return False
def __invalidate(self):
if self.__is_invalidate:
return
self.__is_invalidate = True
gobject.idle_add(self.__update, priority = gobject.PRIORITY_LOW)
def page_up(self):
if self.__lookup_table.page_up():
self.page_up_lookup_table()
return True
return False
def page_down(self):
if self.__lookup_table.page_down():
self.page_down_lookup_table()
return True
return False
def cursor_up(self):
if len(self.__lookup_table.get_candidates_in_current_page()) == 0:
return False
if self.__lookup_table.cursor_up():
self.update_lookup_table(self.__lookup_table, True, True)
curr_text=self.__lookup_table.get_current_candidate().text
self.update_preedit(curr_text, None, len(curr_text), True)
return True
def cursor_down(self):
if len(self.__lookup_table.get_candidates_in_current_page()) == 0:
return False
if self.__lookup_table.cursor_down():
self.update_lookup_table(self.__lookup_table, True, True)
curr_text=self.__lookup_table.get_current_candidate().text
self.update_preedit(curr_text, None, len(curr_text), True)
return True
def __commit_string(self, text):
self.commit_text(ibus.Text(text))
self.__current_word = self.__current_word + text
self.__preedit_string = u""
self.__update()
def __update(self):
preedit_len = len(self.__preedit_string)
attrs = ibus.AttrList()
self.__lookup_table.clean()
if self.__input_method == "en_US":
if preedit_len > 0 :
autocompletion_list = self.__get_autocompletion()
for text in autocompletion_list:
self.__lookup_table.append_candidate(ibus.Text(text))
else:
if preedit_len > 0:
attrs.append(ibus.AttributeForeground(0xff0000, 0, preedit_len))
candidate_list = self.__keymap.get_candidates(self.__preedit_string)
for text in candidate_list:
self.__lookup_table.append_candidate(ibus.Text(text))
self.update_auxiliary_text(ibus.Text(self.__preedit_string, attrs), preedit_len > 0)
attrs.append(ibus.AttributeUnderline(pango.UNDERLINE_SINGLE, 0, preedit_len))
self.update_preedit_text(ibus.Text(self.__preedit_string, attrs), preedit_len, preedit_len > 0)
self.__update_lookup_table()
self.__is_invalidate = False
def __update_prediction(self, previous_word):
#self.__lookup_table.clean()
#if previous_word:
# self.__lookup_table.append_candidate(ibus.Text(previous_word+"Prediction1"))
# self.__lookup_table.append_candidate(ibus.Text(previous_word+"Prediction2"))
#self.update_preedit_text(ibus.Text(self.__preedit_string, None), 0, False)
#self.__update_lookup_table()
#self.__is_invalidate = False
def __get_autocompletion(self):
if self.__input_method == "en_US":
if(len(self.__preedit_string)<3):
return [self.__current_word]
autocompletion_candidates=self.__autocomplete.get_autocompletion_suggestions(self.__preedit_string)
else:
if(len(self.__current_word)<3):
return [self.__current_word]
autocompletion_candidates=self.__autocomplete.get_autocompletion_suggestions(self.__current_word)
return autocompletion_candidates
def __update_lookup_table(self):
visible = self.__lookup_table.get_number_of_candidates() > 0
self.update_lookup_table(self.__lookup_table, visible)
def update_preedit(self, preedit_string, preedit_attrs, cursor_pos, visible):
if preedit_attrs == None:
preedit_attrs = ibus.AttrList()
attr = ibus.AttributeUnderline(ibus.ATTR_UNDERLINE_SINGLE, 0, len(preedit_string))
preedit_attrs.append(attr)
super(SulekhaEngine, self).update_preedit_text(ibus.Text(preedit_string, preedit_attrs), cursor_pos, visible)
def focus_in(self):
self.register_properties(self.__prop_list)
def focus_out(self):
pass
def reset(self):
pass
def property_activate(self, prop_name):
print "PropertyActivate(%s)" % prop_name
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