/usr/lib/python3/dist-packages/gtkspellcheck/spellcheck.py is in python3-gtkspellcheck 3.0-1.1.
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#
# Copyright (C) 2012, Maximilian Köhl <linuxmaxi@googlemail.com>
# Copyright (C) 2012, Carlos Jenkins <carlos@jenkins.co.cr>
#
# 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
"""
A spellchecking library written in pure Python for Gtk based on Enchant. It
supports both Gtk's Python bindings, PyGObject and PyGtk, and for both Python 2
and 3 with automatic switching and binding autodetection. For automatic
translation of the user interface it can use GEdit's translation files.
"""
import enchant
import gettext
import logging
import re
import sys
from pylocales import code_to_name
# Public Objects
__all__ = ['SpellChecker']
# Logger
logger = logging.getLogger(__name__)
# Find which Gtk binding to use based on client's binding
if 'gi.repository.Gtk' in sys.modules:
gtk = sys.modules['gi.repository.Gtk']
_pygobject = True
elif 'gtk' in sys.modules:
gtk = sys.modules['gtk']
_pygobject = False
else:
logger.error('No Gtk module found. Spellcheck will be unusable.')
# Select base list class for Python3/2
try:
from collections import UserList
_list = UserList
except ImportError:
_list = list
# Select basestring for Python2/3
if sys.version_info.major == 3:
basestring = str
# Map between Gedit's translation and PyGtkSpellcheck's own
_GEDIT_MAP = {'Languages' : 'Languages',
'Ignore All' : 'Ignore _All',
'Suggestions' : 'Suggestions',
'(no suggestions)' : '(no suggested words)',
'Add "{word}" to Dictionary' : 'Add w_ord'}
# Translation
if gettext.find('gedit'):
_gedit = gettext.translation('gedit', fallback=True).gettext
_ = lambda message: _gedit(_GEDIT_MAP[message]).replace('_', '')
else:
_ = gettext.translation('pygtkspellcheck' + str(sys.version_info.major), fallback=True).gettext
class SpellChecker(object):
"""
Main spellchecking class, everything important happens here.
:param view: GtkTextView the SpellChecker should be attached to.
:param language: the language which should be used for spellchecking.
Use a combination of two letter lower-case ISO 639 language code with a
two letter upper-case ISO 3166 country code, for example en_US or de_DE.
:param prefix: a prefix for some internal GtkTextMarks.
:param collapse: enclose suggestions in its own menu.
:param params: dictionary with Enchant broker parameters that should be set
e.g. `enchant.myspell.dictionary.path`.
.. attribute:: languages
A list of supported languages.
.. function:: exists(language)
checks if a language exists
:param language: language to check
"""
FILTER_WORD = 'word'
FILTER_LINE = 'line'
FILTER_TEXT = 'text'
DEFAULT_FILTERS = {FILTER_WORD : [r'[0-9.,]+'],
FILTER_LINE : [r'(https?|ftp|file):((//)|(\\\\))+[\w\d:#@%/;$()~_?+-=\\.&]+',
r'[\w\d]+@[\w\d.]+'],
FILTER_TEXT : []}
class _LanguageList(_list):
def __init__(self, *args, **kwargs):
if sys.version_info.major == 3:
super().__init__(*args, **kwargs)
else:
_list.__init__(self, *args, **kwargs)
self.mapping = dict(self)
@classmethod
def from_broker(cls, broker):
return cls(sorted([(language, code_to_name(language))
for language in broker.list_languages()],
key=lambda language: language[1]))
def exists(self, language):
return language in self.mapping
class _Mark():
def __init__(self, buffer, name, start):
self._buffer = buffer
self._name = name
self._mark = self._buffer.create_mark(self._name, start, True)
@property
def iter(self):
return self._buffer.get_iter_at_mark(self._mark)
@property
def inside_word(self):
return self.iter.inside_word()
@property
def word(self):
start = self.iter
if not start.starts_word():
start.backward_word_start()
end = self.iter
if end.inside_word():
end.forward_word_end()
return start, end
def move(self, location):
self._buffer.move_mark(self._mark, location)
def __init__(self, view, language='en', prefix='gtkspellchecker', collapse=True, params={}):
self._view = view
self.collapse = collapse
self._view.connect('populate-popup', lambda entry, menu: self._extend_menu(menu))
self._view.connect('popup-menu', self._click_move_popup)
self._view.connect('button-press-event', self._click_move_button)
self._prefix = prefix
if _pygobject:
self._misspelled = gtk.TextTag.new('{prefix}-misspelled'.format(prefix=self._prefix))
else:
self._misspelled = gtk.TextTag('{prefix}-misspelled'.format(prefix=self._prefix))
self._misspelled.set_property('underline', 4)
self._broker = enchant.Broker()
for param, value in params: self._broker.set_param(param, value)
self.languages = SpellChecker._LanguageList.from_broker(self._broker)
self._language = language if self.languages.exists(language) else 'en'
self._dictionary = self._broker.request_dict(language)
self._deferred_check = False
self._filters = dict(SpellChecker.DEFAULT_FILTERS)
self._regexes = {SpellChecker.FILTER_WORD : re.compile('|'.join(self._filters[SpellChecker.FILTER_WORD])),
SpellChecker.FILTER_LINE : re.compile('|'.join(self._filters[SpellChecker.FILTER_LINE])),
SpellChecker.FILTER_TEXT : re.compile('|'.join(self._filters[SpellChecker.FILTER_TEXT]), re.MULTILINE)}
self._enabled = True
self.buffer_initialize()
@property
def language(self):
"""
The language used for spellchecking
"""
return self._language
@language.setter
def language(self, language):
if language != self._language and self.languages.exists(language):
self._language = language
self._dictionary = self._broker.request_dict(language)
self.recheck()
@property
def enabled(self):
"""
Enable or disable spellchecking
"""
return self._enabled
@enabled.setter
def enabled(self, enabled):
if enabled and not self._enabled:
self.enable()
elif not enabled and self._enabled:
self.disable()
def buffer_initialize(self):
"""
Initialize the GtkTextBuffer associated with the GtkTextView.
If you associate a new GtkTextBuffer with the GtkTextView call this method.
"""
self._buffer = self._view.get_buffer()
self._buffer.connect('insert-text', self._before_text_insert)
self._buffer.connect_after('insert-text', self._after_text_insert)
self._buffer.connect_after('delete-range', self._range_delete)
self._buffer.connect_after('mark-set', self._mark_set)
start = self._buffer.get_bounds()[0]
self._marks = {'insert-start' : SpellChecker._Mark(self._buffer, '{prefix}-insert-start'.format(prefix=self._prefix), start),
'insert-end' : SpellChecker._Mark(self._buffer, '{prefix}-insert-end'.format(prefix=self._prefix), start),
'click' : SpellChecker._Mark(self._buffer, '{prefix}-click'.format(prefix=self._prefix), start)}
self._table = self._buffer.get_tag_table()
self._table.add(self._misspelled)
self.ignored_tags = []
def tag_added(tag, *args):
if hasattr(tag, 'spell_check') and not getattr(tag, 'spell_check'):
self.ignored_tags.append(tag)
def tag_removed(tag, *args):
if tag in self.ignored_tags:
self.ignored_tags.remove(tag)
self._table.connect('tag-added', tag_added)
self._table.connect('tag-removed', tag_removed)
self._table.foreach(tag_added, None)
self.no_spell_check = self._table.lookup('no-spell-check')
if not self.no_spell_check:
if _pygobject:
self.no_spell_check = gtk.TextTag.new('no-spell-check')
else:
self.no_spell_check = gtk.TextTag('no-spell-check')
self._table.add(self.no_spell_check)
self.recheck()
def recheck(self):
"""
Rechecks the spelling of the whole text.
"""
start, end = self._buffer.get_bounds()
self.check_range(start, end, True)
def disable(self):
"""
Disable spellchecking.
"""
self._enabled = False
start, end = self._buffer.get_bounds()
self._buffer.remove_tag(self._misspelled, start, end)
def enable(self):
"""
Enable spellchecking.
"""
self._enabled = True
self.recheck()
def append_filter(self, regex, filter_type):
"""
Append a new filter to the filter list.
Filters are useful to ignore some misspelled words based on regular expressions.
:param regex: the regex used for filtering
:param filter_type: the type of the filter
Filter Types:
:const:`SpellChecker.FILTER_WORD`: The regex must match the whole word you want to filter.
The word separation is done by Pango's word separation algorythm so, for example, urls won't work here because they are split in many words.
:const:`SpellChecker.FILTER_LINE`: If the expression you want to match is a single line expression use this type.
It should not be an open end expression because then the rest of the line with the text you want to filter will become correct.
:const:`SpellChecker.FILTER_TEXT`: Use this if you want to filter multiline expressions.
The regex will be compiled with the `MULTILINE` flag.
Same with open end expressions apply here.
"""
self._filters[filter_type].append(regex)
if filter_type == SpellChecker.FILTER_TEXT:
self._regexes[filter_type] = re.compile('|'.join(self._filters[filter_type]), re.MULTILINE)
else:
self._regexes[filter_type] = re.compile('|'.join(self._filters[filter_type]))
def remove_filter(self, regex, filter_type):
"""
Remove a filter from the filter list.
:param regex: the regex which used for filtering
:param filter_type: the type of the filter
"""
self._filters[filter_type].remove(regex)
if filter_type == SpellChecker.FILTER_TEXT:
self._regexes[filter_type] = re.compile('|'.join(self._filters[filter_type]), re.MULTILINE)
else:
self._regexes[filter_type] = re.compile('|'.join(self._filters[filter_type]))
def append_ignore_tag(self, tag):
"""
Appends a tag to the list of ignored tags.
A string will be automatic resolved into a tag object.
:param tag: tag object or tag name
"""
if isinstance(tag, basestring):
tag = self._table.lookup(tag)
self.ignored_tags.append(tag)
def remove_ignore_tag(self, tag):
"""
Removes a tag from the list of ignored tags.
A string will be automatic resolved into a tag object.
:param tag: tag object or tag name
"""
if isinstance(tag, basestring):
tag = self._table.lookup(tag)
self.ignored_tags.remove(tag)
def add_to_dictionary(self, word):
"""
Adds a word to user's dictionary.
:param word: the word to add
"""
self._dictionary.add_to_pwl(word)
self.recheck()
def ignore_all(self, word):
"""
Ignores a word for the current session.
:param word: the word to ignore
"""
self._dictionary.add_to_session(word)
self.recheck()
def check_range(self, start, end, force_all=False):
"""
Checks a specified range between two GtkTextIters.
:param start: start iter - checking starts here
:param end: end iter - checking ends here
"""
if not self._enabled:
return
if end.inside_word(): end.forward_word_end()
if not start.starts_word() and (start.inside_word() or start.ends_word()): start.backward_word_start()
self._buffer.remove_tag(self._misspelled, start, end)
cursor = self._buffer.get_iter_at_mark(self._buffer.get_insert())
precursor = cursor.copy()
precursor.backward_char()
highlight = cursor.has_tag(self._misspelled) or precursor.has_tag(self._misspelled)
if not start.get_offset():
start.forward_word_end()
start.backward_word_start()
word_start = start.copy()
while word_start.compare(end) < 0:
word_end = word_start.copy()
word_end.forward_word_end()
in_word = (word_start.compare(cursor) < 0) and (cursor.compare(word_end) <= 0)
if in_word and not force_all:
if highlight:
self._check_word(word_start, word_end)
else:
self._deferred_check = True
else:
self._check_word(word_start, word_end)
self._deferred_check = False
word_end.forward_word_end()
word_end.backward_word_start()
if word_start.equal(word_end):
break
word_start = word_end.copy()
def _languages_menu(self):
def _set_language(item, code):
self.language = code
if _pygobject:
menu = gtk.Menu.new()
group = []
else:
menu = gtk.Menu()
group = gtk.RadioMenuItem()
connect = []
for code, name in self.languages:
if _pygobject:
item = gtk.RadioMenuItem.new_with_label(group, name)
group.append(item)
else:
item = gtk.RadioMenuItem(group, name)
if code == self.language:
item.set_active(True)
connect.append((item, code))
menu.append(item)
for item, code in connect:
item.connect('activate', _set_language, code)
return menu
def _suggestion_menu(self, word):
menu = []
suggestions = self._dictionary.suggest(word)
if not suggestions:
if _pygobject:
item = gtk.MenuItem.new()
label = gtk.Label.new('')
else:
item = gtk.MenuItem()
label = gtk.Label()
try:
label.set_halign(gtk.Align.LEFT)
except AttributeError:
label.set_alignment(0.0, 0.5)
label.set_markup('<i>{text}</i>'.format(text=_('(no suggestions)')))
item.add(label)
menu.append(item)
else:
for suggestion in suggestions:
if _pygobject:
item = gtk.MenuItem.new()
label = gtk.Label.new('')
else:
item = gtk.MenuItem()
label = gtk.Label()
label.set_markup('<b>{text}</b>'.format(text=suggestion))
try:
label.set_halign(gtk.Align.LEFT)
except AttributeError:
label.set_alignment(0.0, 0.5)
item.add(label)
item.connect('activate', self._replace_word, word, suggestion)
menu.append(item)
if _pygobject:
menu.append(gtk.SeparatorMenuItem.new())
item = gtk.MenuItem.new_with_label(_('Add "{word}" to Dictionary').format(word=word))
else:
menu.append(gtk.SeparatorMenuItem())
item = gtk.MenuItem(_('Add "{word}" to Dictionary').format(word=word))
item.connect('activate', lambda *args: self.add_to_dictionary(word))
menu.append(item)
if _pygobject:
item = gtk.MenuItem.new_with_label(_('Ignore All'))
else:
item = gtk.MenuItem(_('Ignore All'))
item.connect('activate', lambda *args: self.ignore_all(word))
menu.append(item)
return menu
def _extend_menu(self, menu):
if not self._enabled:
return
if _pygobject:
separator = gtk.SeparatorMenuItem.new()
else:
separator = gtk.SeparatorMenuItem()
separator.show()
menu.prepend(separator)
if _pygobject:
languages = gtk.MenuItem.new_with_label(_('Languages'))
else:
languages = gtk.MenuItem(_('Languages'))
languages.set_submenu(self._languages_menu())
languages.show_all()
menu.prepend(languages)
if self._marks['click'].inside_word:
start, end = self._marks['click'].word
if start.has_tag(self._misspelled):
word = self._buffer.get_text(start, end, False)
submenu_items = self._suggestion_menu(word)
if self.collapse:
if _pygobject:
suggestions = gtk.MenuItem.new_with_label(_('Suggestions'))
submenu = gtk.Menu.new()
else:
suggestions = gtk.MenuItem(_('Suggestions'))
submenu = gtk.Menu()
for i in submenu_items:
submenu.append(i)
suggestions.set_submenu(submenu)
suggestions.show_all()
menu.prepend(suggestions)
else:
submenu_items.reverse()
for i in submenu_items:
menu.prepend(i)
menu.show_all()
def _click_move_popup(self, *args):
self._marks['click'].move(self._buffer.get_iter_at_mark(self._buffer.get_insert()))
return False
def _click_move_button(self, widget, event):
if event.button == 3:
if self._deferred_check: self._check_deferred_range(True)
x, y = self._view.window_to_buffer_coords(2, int(event.x), int(event.y))
self._marks['click'].move(self._view.get_iter_at_location(x, y))
return False
def _before_text_insert(self, textbuffer, location, text, length):
self._marks['insert-start'].move(location)
def _after_text_insert(self, textbuffer, location, text, length):
start = self._marks['insert-start'].iter
self.check_range(start, location)
self._marks['insert-end'].move(location)
def _range_delete(self, textbuffer, start, end):
self.check_range(start, end)
def _mark_set(self, textbuffer, location, mark):
if mark == self._buffer.get_insert() and self._deferred_check:
self._check_deferred_range(False)
def _replace_word(self, item, old_word, new_word):
start, end = self._marks['click'].word
offset = start.get_offset()
self._buffer.begin_user_action()
self._buffer.delete(start, end)
self._buffer.insert(self._buffer.get_iter_at_offset(offset), new_word)
self._buffer.end_user_action()
self._dictionary.store_replacement(old_word, new_word)
def _check_deferred_range(self, force_all):
start = self._marks['insert-start'].iter
end = self._marks['insert-end'].iter
self.check_range(start, end, force_all)
def _check_word(self, start, end):
if start.has_tag(self.no_spell_check):
return
for tag in self.ignored_tags:
if start.has_tag(tag):
return
word = self._buffer.get_text(start, end, False).strip()
if len(self._filters[SpellChecker.FILTER_WORD]):
if self._regexes[SpellChecker.FILTER_WORD].match(word):
return
if len(self._filters[SpellChecker.FILTER_LINE]):
line_start = self._buffer.get_iter_at_line(start.get_line())
line_end = end.copy()
line_end.forward_to_line_end()
line = self._buffer.get_text(line_start, line_end, False)
for match in self._regexes[SpellChecker.FILTER_LINE].finditer(line):
if match.start() <= start.get_line_offset() <= match.end():
start = self._buffer.get_iter_at_line_offset(start.get_line(), match.start())
end = self._buffer.get_iter_at_line_offset(start.get_line(), match.end())
self._buffer.remove_tag(self._misspelled, start, end)
return
if len(self._filters[SpellChecker.FILTER_TEXT]):
text_start, text_end = self._buffer.get_bounds()
text = self._buffer.get_text(text_start, text_end, False)
for match in self._regexes[SpellChecker.FILTER_TEXT].finditer(text):
if match.start() <= start.get_offset() <= match.end():
start = self._buffer.get_iter_at_offset(match.start())
end = self._buffer.get_iter_at_offset(match.end())
self._buffer.remove_tag(self._misspelled, start, end)
return
if not self._dictionary.check(word):
self._buffer.apply_tag(self._misspelled, start, end)
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