gaupol/dialogs/spell_check.py¶
Source code for module gaupol.dialogs.spell_check from file gaupol/dialogs/spell_check.py.
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# Copyright (C) 2005 Osmo Salomaa
#
# 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/>.
"""Dialog for checking and correcting spelling."""
import aeidon
import gaupol
import os
_ = aeidon.i18n._
from gi.repository import Gtk
from gi.repository import Pango
try:
import enchant.checker
except Exception:
pass
__all__ = ("SpellCheckDialog",)
class SpellCheckDialog(gaupol.BuilderDialog):
"""
Dialog for checking and correcting spelling.
:cvar _max_replacements: Maximum amount of replacements to save to file
:cvar _personal_dir: Directory for user replacement files
:ivar _checker: :class:`enchant.Checker` instance used
:ivar _doc: :attr:`aeidon.documents` item currectly being checked
:ivar _entry_handler: Handler for replacement entry's "changed" signal
:ivar _language: Language code for :attr:`_checker`
:ivar _new_rows: List of rows in the current page with changed texts
:ivar _new_texts: List of changed texts in the current page
:ivar _page: :class:`gaupol.Page` instance currectly being checked
:ivar _pager: Iterator to iterate over all target pages
:ivar _replacements: List of misspelled words and their replacements
:ivar _row: Row currently being checked
"""
_max_replacements = 10000
_personal_dir = os.path.join(aeidon.CONFIG_HOME_DIR, "spell-check")
_widgets = ("add_button",
"edit_button",
"entry",
"ignore_all_button",
"ignore_button",
"join_back_button",
"join_forward_button",
"replace_all_button",
"replace_button",
"grid",
"text_view",
"tree_view")
def __init__(self, parent, application):
"""
Initialize a :class:`SpellCheckDialog` instance.
Raise :exc:`ValueError` if dictionary initialization fails.
"""
gaupol.BuilderDialog.__init__(self, "spell-check-dialog.ui")
self.application = application
self._checker = None
self._doc = None
self._entry_handler = None
self._language = gaupol.conf.spell_check.language
self._language_name = gaupol.conf.spell_check.language
self._new_rows = []
self._new_texts = []
self._page = None
self._pager = None
self._replacements = []
self._row = None
with aeidon.util.silent(LookupError):
name = aeidon.locales.code_to_name(self._language)
self._language_name = name
self._init_spell_check()
self._init_widgets()
self._init_sensitivities()
self.resize(*gaupol.conf.spell_check.size)
self._dialog.set_transient_for(parent)
self._dialog.set_default_response(Gtk.ResponseType.CLOSE)
self._start()
def _advance(self):
"""Advance to the next spelling error."""
while True:
try:
# Advance to the next spelling error in the current text.
return self._advance_current()
except StopIteration:
# Save the current text if changes were made.
text = self._checker.get_text()
subtitle = self._page.project.subtitles[self._row]
if text != subtitle.get_text(self._doc):
self._new_rows.append(self._row)
self._new_texts.append(text)
# Move to the next row in the current page, move to the next page
# in the sequence of target pages or end when all pages checked.
try:
self._advance_row()
except StopIteration:
try:
next(self._pager)
except StopIteration:
break
self._set_done()
def _advance_current(self):
"""
Advance to the next spelling error in the current text.
Raise :exc:`StopIteration` when no more errors in the current text.
"""
next(self._checker)
col = self._page.document_to_text_column(self._doc)
self._page.view.set_focus(self._row, col)
self._page.view.scroll_to_row(self._row)
text = self._checker.get_text()
text_buffer = self._text_view.get_buffer()
text_buffer.set_text(text)
a = self._checker.wordpos
z = a + len(self._checker.word)
start = text_buffer.get_iter_at_offset(a)
end = text_buffer.get_iter_at_offset(z)
text_buffer.apply_tag_by_name("misspelled", start, end)
mark = text_buffer.create_mark(None, end, True)
self._text_view.scroll_to_mark(mark=mark,
within_margin=0,
use_align=False,
xalign=0.5,
yalign=0.5)
leading = self._checker.leading_context(1)
trailing = self._checker.trailing_context(1)
self._join_back_button.set_sensitive(leading.isspace())
self._join_forward_button.set_sensitive(trailing.isspace())
self._set_entry_text("")
self._populate_tree_view(self._checker.suggest())
self._tree_view.grab_focus()
def _advance_row(self):
"""
Advance to the next subtitle and feed its text to the spell-checker.
Raise :exc:`StopIteration` when no more subtitles in the current page.
"""
self._row += 1
if self._row >= len(self._page.project.subtitles):
raise StopIteration
subtitle = self._page.project.subtitles[self._row]
text = subtitle.get_text(self._doc)
self._checker.set_text(text)
def _get_next_page(self):
"""Return the next page to check spelling in."""
field = gaupol.conf.spell_check.field
doc = gaupol.util.text_field_to_document(field)
target = gaupol.conf.spell_check.target
for page in self.application.get_target_pages(target):
self.application.set_current_page(page)
self._page = page
self._doc = doc
self._row = -1
self._advance_row()
yield page
self._register_changes()
def _init_checker(self):
"""
Initialize spell-checker and its dictionary.
Raise :exc:`ValueError` if dictionary initialization fails.
"""
try:
dictionary = enchant.Dict(self._language)
# Sometimes enchant will initialize a dictionary that will not
# actually work when trying to use it, hence check something.
dictionary.check("gaupol")
except enchant.Error as error:
self._show_error_dialog(str(error))
raise ValueError("Dictionary initialization failed for language {}"
.format(repr(self._language)))
self._checker = enchant.checker.SpellChecker(dictionary, "")
def _init_replacements(self):
"""Read misspelled words and their replacements from file."""
basename = "{}.repl".format(gaupol.conf.spell_check.language)
path = os.path.join(self._personal_dir, basename)
if not os.path.isfile(path): return
with aeidon.util.silent(IOError, OSError):
lines = aeidon.util.readlines(path)
for line in aeidon.util.get_unique(lines):
misspelled, correct = line.strip().split("|", 1)
self._replacements.append((misspelled, correct))
def _init_sensitivities(self):
"""Initialize widget sensitivities."""
self._join_back_button.set_sensitive(False)
self._join_forward_button.set_sensitive(False)
self._replace_all_button.set_sensitive(False)
self._replace_button.set_sensitive(False)
def _init_spell_check(self):
"""
Initialize spell-check components and related widgets.
Raise :exc:`ValueError` if dictionary initialization fails.
"""
aeidon.util.makedirs(self._personal_dir)
self._init_checker()
self._init_replacements()
def _init_tree_view(self):
"""Initialize the suggestion tree view."""
selection = self._tree_view.get_selection()
selection.set_mode(Gtk.SelectionMode.SINGLE)
selection.connect("changed", self._on_tree_view_selection_changed)
store = Gtk.ListStore(str)
self._tree_view.set_model(store)
column = Gtk.TreeViewColumn("", Gtk.CellRendererText(), text=0)
self._tree_view.append_column(column)
def _init_widgets(self):
"""Initialize widget properties."""
self._init_tree_view()
font = gaupol.util.get_font()
gaupol.util.set_widget_font(self._entry, font)
gaupol.util.set_widget_font(self._text_view, font)
gaupol.util.set_widget_font(self._tree_view, font)
text_buffer = self._text_view.get_buffer()
text_buffer.create_tag("misspelled", weight=Pango.Weight.BOLD)
gaupol.util.scale_to_size(self._text_view, nchar=50, nlines=4, font=font)
gaupol.util.scale_to_size(self._tree_view, nchar=20, nlines=6, font=font)
self._entry_handler = self._entry.connect("changed",
self._on_entry_changed)
def _on_add_button_clicked(self, *args):
"""Add the current word to the user dictionary."""
self._checker.dict.add(self._checker.word)
self._advance()
def _on_edit_button_clicked(self, *args):
"""Edit the current text in a separate dialog."""
text = self._checker.get_text()
dialog = gaupol.TextEditDialog(self._dialog, text)
response = gaupol.util.run_dialog(dialog)
text = dialog.get_text()
dialog.destroy()
if response != Gtk.ResponseType.OK: return
self._checker.set_text(text)
self._advance()
def _on_entry_changed(self, entry):
"""Populate suggestions based on text in `entry`."""
word = entry.get_text()
suggestions = (self._checker.suggest(word) if word else [])
self._populate_tree_view(suggestions, select=False)
self._replace_button.set_sensitive(bool(word))
self._replace_all_button.set_sensitive(bool(word))
def _on_ignore_all_button_clicked(self, *args):
"""Ignore all instances of the current word."""
self._checker.ignore_always()
self._advance()
def _on_ignore_button_clicked(self, *args):
"""Ignore the current word."""
self._advance()
def _on_join_back_button_clicked(self, *args):
"""Join the current word with the preceding word."""
text = self._checker.get_text()
a = self._checker.wordpos
text = text[:a-1] + text[a:]
self._checker.set_text(text)
self._advance()
def _on_join_forward_button_clicked(self, *args):
"""Join the current word with the following word."""
text = self._checker.get_text()
z = self._checker.wordpos + len(self._checker.word)
text = text[:z] + text [z+1:]
self._checker.set_text(text)
self._advance()
def _on_replace_all_button_clicked(self, *args):
"""Replace all instances of the current word."""
misspelled = self._checker.word
correct = self._entry.get_text()
self._replacements.append((misspelled, correct))
self._checker.replace_always(correct)
self._advance()
def _on_replace_button_clicked(self, *args):
"""Replace the current word."""
misspelled = self._checker.word
correct = self._entry.get_text()
self._replacements.append((misspelled, correct))
self._checker.replace(correct)
self._advance()
def _on_response(self, dialog, response):
"""Apply changes to the current page."""
self._register_changes()
self._save_geometry()
self._set_done()
def _on_tree_view_selection_changed(self, *args):
"""Copy the selected suggestion into the entry."""
selection = self._tree_view.get_selection()
store, itr = selection.get_selected()
if itr is None: return
path = store.get_path(itr)
row = gaupol.util.tree_path_to_row(path)
self._set_entry_text(store[row][0])
def _populate_tree_view(self, suggestions, select=True):
"""Populate the tree view with `suggestions`."""
word = self._checker.word
repl = reversed(self._replacements)
replacements = [x[1] for x in repl if x[0] == word]
suggestions = list(replacements) + list(suggestions)
suggestions = aeidon.util.get_unique(suggestions)
store = self._tree_view.get_model()
self._tree_view.set_model(None)
store.clear()
for suggestion in suggestions:
store.append((suggestion,))
self._tree_view.set_model(store)
if select and len(store) > 0:
self._tree_view.set_cursor(0)
self._tree_view.scroll_to_cell(0)
def _register_changes(self):
"""Register changes to the current page."""
if not self._new_rows: return
self._page.project.replace_texts(self._new_rows,
self._doc,
self._new_texts)
self._page.project.set_action_description(
aeidon.registers.DO, _("Spell-checking"))
self._new_rows = []
self._new_texts = []
def _save_geometry(self):
"""Save dialog size."""
with aeidon.util.silent(AttributeError):
# is_maximized was added in GTK+ 3.12.
if self.is_maximized(): return
gaupol.conf.spell_check.size = list(self.get_size())
def _set_done(self):
"""Set state of widgets for finished spell-check."""
self._text_view.get_buffer().set_text("")
self._set_entry_text("")
self._populate_tree_view(())
self._grid.set_sensitive(False)
self._write_replacements()
def _set_entry_text(self, word):
"""Set `word` to the entry with its "changed" handler blocked."""
self._entry.handler_block(self._entry_handler)
self._entry.set_text(word)
self._entry.handler_unblock(self._entry_handler)
self._replace_button.set_sensitive(bool(word))
self._replace_all_button.set_sensitive(bool(word))
def _show_error_dialog(self, message):
"""Show an error dialog after failing to load dictionary."""
title = _('Failed to load dictionary for language "{}"')
title = title.format(self._language_name)
dialog = gaupol.ErrorDialog(self._dialog, title, message)
dialog.add_button(_("_OK"), Gtk.ResponseType.OK)
dialog.set_default_response(Gtk.ResponseType.OK)
gaupol.util.flash_dialog(dialog)
def _start(self):
"""Start checking the spelling."""
self._pager = self._get_next_page()
next(self._pager)
self._advance()
def _write_replacements(self):
"""Write misspelled words and their replacements to file."""
if not self._replacements: return
self._replacements = aeidon.util.get_unique(self._replacements,
keep_last=True)
basename = "{}.repl".format(self._language)
path = os.path.join(self._personal_dir, basename)
if len(self._replacements) > self._max_replacements:
# Discard the oldest of replacements.
self._replacements[-self._max_replacements:]
text = "\n".join("|".join(x) for x in self._replacements) + "\n"
with aeidon.util.silent(IOError, OSError):
aeidon.util.write(path, text)
|