gaupol/dialogs/search.py¶
Source code for module gaupol.dialogs.search from file gaupol/dialogs/search.py.
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# Copyright (C) 2006 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 searching for and replacing text."""
import aeidon
import functools
import gaupol
import os
import re
_ = aeidon.i18n._
from gi.repository import Gdk
from gi.repository import Gtk
__all__ = ("SearchDialog",)
def page_changing(function):
"""Decorator for :class:`SearchDialog` methods that edit data."""
@functools.wraps(function)
def wrapper(*args, **kwargs):
args[0]._handle_page_changes = False
value = function(*args, **kwargs)
args[0]._handle_page_changes = True
return value
return wrapper
class SearchDialog(gaupol.BuilderDialog):
"""
Dialog for searching for and replacing text.
:ivar _handle_page_changes: ``True`` to invalidate search on page changes
:ivar _match_doc: :attr:`gaupol.documents` item of the last match
:ivar _match_page: :class:`gaupol.Page` instance of the last match
:ivar _match_row: Row in :attr:`_match_page` of the last match
:ivar _match_span: Start, end position of the last match
:ivar patterns: List of patterns previously searched for
:ivar replacements: List of replacements previously used
:ivar _statuslabel: Instance of :class:`gaupol.FloatingLabel` used
:ivar _was_next: ``True`` if the last search was "next", else ``False``
"""
_widgets = ("all_radio",
"current_radio",
"ignore_case_check",
"main_check",
"next_button",
"overlay",
"pattern_combo",
"previous_button",
"regex_check",
"replace_all_button",
"replace_button",
"replacement_combo",
"search_vbox",
"text_view",
"tran_check")
def __init__(self, parent, application):
"""Initialize a :class:`SearchDialog` instance."""
gaupol.BuilderDialog.__init__(self, "search-dialog.ui")
self.application = application
self._handle_page_changes = True
self._match_doc = None
self._match_page = None
self._match_row = None
self._match_span = None
self.max_history = 10
self._pattern_entry = self._pattern_combo.get_child()
self.patterns = []
self._replacement_entry = self._replacement_combo.get_child()
self.replacements = []
self._statuslabel = gaupol.FloatingLabel()
self._was_next = None
self._read_history("patterns")
self._read_history("replacements")
self._init_text_view()
self._init_pattern_combo()
self._init_replacement_combo()
self._init_keys()
self._init_values()
self._init_signal_handlers()
self._init_sensitivities()
self._overlay.add_overlay(self._statuslabel)
self._overlay.show_all()
self._statuslabel.set_text(None)
self._dialog.set_transient_for(parent)
self._dialog.set_type_hint(Gdk.WindowTypeHint.NORMAL)
self._dialog.set_default_response(Gtk.ResponseType.CLOSE)
def _add_pattern_to_history(self):
"""Add current pattern to the pattern combo box."""
pattern = self._pattern_entry.get_text()
store = self._pattern_combo.get_model()
if pattern == self.application.pattern: return
self.application.pattern = pattern
self.patterns.insert(0, pattern)
self.patterns = aeidon.util.get_unique(self.patterns)
del self.patterns[self.max_history:]
store.clear()
for pattern in self.patterns:
store.append((pattern,))
self._write_history("patterns")
self.application.update_gui()
def _add_replacement_to_history(self):
"""Add current replacement to the replacement combo box."""
replacement = self._replacement_entry.get_text()
store = self._replacement_combo.get_model()
if replacement == self.application.replacement: return
self.application.replacement = replacement
self.replacements.insert(0, replacement)
self.replacements = aeidon.util.get_unique(self.replacements)
del self.replacements[self.max_history:]
store.clear()
for replacement in self.replacements:
store.append((replacement,))
self._write_history("replacements")
self.application.update_gui()
def _get_cursor_offset(self, page, row, doc, next):
"""Return current cursor offset of the search or ``None``."""
if page is not self._match_page: return None
if row != self._match_row: return None
if doc != self._match_doc: return None
return self._match_span[next]
def _get_fields(self):
"""Return a sequence of fields to search in."""
fields = []
if self._main_check.get_active():
fields.append(gaupol.fields.MAIN_TEXT)
if self._tran_check.get_active():
fields.append(gaupol.fields.TRAN_TEXT)
return tuple(fields)
def _get_position(self, next):
"""
Return current position of the search.
Raise :exc:`gaupol.Default` if no pages open.
Return row, document, cursor offset.
"""
page = self.application.get_current_page()
gaupol.util.raise_default(page is None)
rows = page.view.get_selected_rows()
row = (rows[0] if rows else None)
if row is None:
row = (0 if next else len(page.project.subtitles) - 1)
col = page.view.get_focus()[1]
doc = None
if page.view.is_text_column(col):
doc = page.text_column_to_document(col)
docs = list(map(gaupol.util.text_field_to_document,
gaupol.conf.search.fields))
if doc is None or not doc in docs:
doc = (docs[0] if next else docs[-1])
pos = self._get_cursor_offset(page, row, doc, next)
return row, doc, pos
def _get_target(self):
"""Return :attr:`gaupol.targets` item to search in."""
if self._current_radio.get_active():
return gaupol.targets.CURRENT
if self._all_radio.get_active():
return gaupol.targets.ALL
raise ValueError("Invalid target radio state")
def _init_keys(self):
"""Initialize keyboard shortcuts."""
accel_group = Gtk.AccelGroup()
accel_group.connect(Gdk.KEY_f,
Gdk.ModifierType.CONTROL_MASK,
Gtk.AccelFlags.MASK,
self._on_find_key_pressed)
self.add_accel_group(accel_group)
def _init_pattern_combo(self):
"""Initialize the pattern combo box."""
store = Gtk.ListStore(str)
self._pattern_combo.set_model(store)
for pattern in self.patterns:
store.append((pattern,))
self._pattern_combo.set_entry_text_column(0)
def _init_replacement_combo(self):
"""Initialize the replacement combo box."""
store = Gtk.ListStore(str)
self._replacement_combo.set_model(store)
for replacement in self.replacements:
store.append((replacement,))
self._replacement_combo.set_entry_text_column(0)
def _init_sensitivities(self):
"""Initialize widget sensitivities."""
self._next_button.set_sensitive(False)
self._pattern_entry.emit("changed")
self._previous_button.set_sensitive(False)
self._regex_check.emit("toggled")
self._replace_all_button.set_sensitive(False)
self._replace_button.set_sensitive(False)
self._replacement_entry.emit("changed")
self._text_view.set_sensitive(False)
def _init_signal_handlers(self):
"""Initialize signal handlers."""
aeidon.util.connect(self, "_pattern_entry", "changed")
aeidon.util.connect(self, "application", "page-changed")
callback = lambda *args: args[-1]._update_search_targets()
self.application.connect("page-added", callback, self)
gaupol.conf.search.connect("notify::fields", callback, self)
gaupol.conf.search.connect("notify::target", callback, self)
def _init_text_view(self):
"""Initialize the text view."""
gaupol.util.prepare_text_view(self._text_view)
gaupol.util.scale_to_size(self._text_view, nchar=60, nlines=4)
text_buffer = self._text_view.get_buffer()
text_buffer.connect("changed", self._on_text_buffer_changed)
def _init_values(self):
"""Initialize default values for widgets."""
self._pattern_entry.set_text(self.application.pattern)
self._replacement_entry.set_text(self.application.replacement)
self._regex_check.set_active(gaupol.conf.search.regex)
self._ignore_case_check.set_active(gaupol.conf.search.ignore_case)
fields = gaupol.conf.search.fields
target = gaupol.conf.search.target
self._main_check.set_active(gaupol.fields.MAIN_TEXT in fields)
self._tran_check.set_active(gaupol.fields.TRAN_TEXT in fields)
self._all_radio.set_active(target == gaupol.targets.ALL)
self._current_radio.set_active(target == gaupol.targets.CURRENT)
self._update_search_targets()
@aeidon.deco.silent(gaupol.Default)
def next(self):
"""Find the next match of pattern."""
page = self.application.get_current_page()
row, doc, pos = self._get_position(next=True)
pages = self.application.pages[:]
i = pages.index(page)
# Loop twice over the current page,
# since starting in the middle.
for page in (pages[i:] + pages[:i+1]):
self._set_pattern(page)
try:
# Return match in page after position.
row, doc, span = page.project.find_next(row, doc, pos)
return self._set_success_state(page, row, doc, span, next=True)
except StopIteration:
target = gaupol.conf.search.target
if target == gaupol.targets.CURRENT:
# Fail wrapped single-page search.
return self._set_failure_state()
# Proceed to the next page.
row = doc = pos = None
# Fail wrapped search of all pages.
self._set_failure_state()
def _on_all_radio_toggled(self, radio_button):
"""Save search target."""
gaupol.conf.search.target = self._get_target()
def _on_application_page_changed(self, application, page):
"""Invalidate the current search if underlying data has changed."""
# If data in page was changed from outside the search dialog,
# the current search must be invalidated to avoid making edits
# (especially via the text view's focus-out handler) based on data
# that no longer exists. All search dialog's data changing methods
# need to be wrapped to disable this handling of application's
# page-changed signals.
if self._handle_page_changes and self._match_page is not None:
self._reset_properties()
def _on_current_radio_toggled(self, radio_button):
"""Save search target."""
gaupol.conf.search.target = self._get_target()
def _on_find_key_pressed(self, *args):
"""Move focus to the pattern entry."""
self._pattern_entry.grab_focus()
def _on_ignore_case_check_toggled(self, check_button):
"""Save ignore case setting."""
gaupol.conf.search.ignore_case = check_button.get_active()
def _on_main_check_toggled(self, check_button):
"""Save search target."""
gaupol.conf.search.fields = list(self._get_fields())
self._search_vbox.set_sensitive(bool(self._get_fields()))
def _on_next_button_clicked(self, *args):
"""Find the next match of pattern."""
# Make sure the text view experiences a focus-out-event.
self._next_button.grab_focus()
self.next()
def _on_pattern_entry_changed(self, entry):
"""Update action sensitivities."""
have_pattern = bool(entry.get_text())
self._next_button.set_sensitive(have_pattern)
self._previous_button.set_sensitive(have_pattern)
self._replace_all_button.set_sensitive(have_pattern)
def _on_previous_button_clicked(self, *args):
"""Find the previous match of pattern."""
# Make sure the text view experiences a focus-out-event.
self._previous_button.grab_focus()
self.previous()
def _on_regex_check_toggled(self, check_button):
"""Save regular expression setting."""
use_regex = check_button.get_active()
gaupol.conf.search.regex = use_regex
self.set_response_sensitive(Gtk.ResponseType.HELP, use_regex)
def _on_replace_all_button_clicked(self, *args):
"""Replace all matches of pattern."""
# Make sure the text view experiences a focus-out-event.
self._replace_all_button.grab_focus()
gaupol.util.set_cursor_busy(self._dialog)
self.replace_all()
gaupol.util.set_cursor_normal(self._dialog)
def _on_replace_button_clicked(self, *args):
"""Replace the current match of pattern."""
# Make sure the text view experiences a focus-out-event.
self._replace_button.grab_focus()
self._replace_button.set_sensitive(False)
self.replace()
def _on_response(self, dialog, response):
"""Do not send response if browsing help."""
if response == Gtk.ResponseType.HELP:
gaupol.util.show_uri(gaupol.REGEX_HELP_URL)
self.stop_emission("response")
def _on_show(self, *args):
"""Move focus to the pattern entry and select the pattern."""
self._pattern_entry.select_region(0, -1)
self._pattern_entry.grab_focus()
def _on_text_buffer_changed(self, *args):
"""Disable replace action."""
self._replace_button.set_sensitive(False)
@page_changing
def _on_text_view_focus_out_event(self, text_view, event):
"""Save changes made in `text_view`."""
if self._match_page is None: return
if self._match_row is None: return
if self._match_doc is None: return
if not self._text_view.get_sensitive(): return
page = self.application.get_current_page()
if page is not self._match_page: return
text_buffer = text_view.get_buffer()
start, end = text_buffer.get_bounds()
text = text_buffer.get_text(start, end, False)
page.project.set_text(self._match_row, self._match_doc, text)
def _on_tran_check_toggled(self, check_button):
"""Save search target."""
gaupol.conf.search.fields = list(self._get_fields())
self._search_vbox.set_sensitive(bool(self._get_fields()))
@aeidon.deco.silent(gaupol.Default)
def previous(self):
"""Find the previous match of pattern."""
page = self.application.get_current_page()
row, doc, pos = self._get_position(next=False)
pages = self.application.pages[::-1]
i = pages.index(page)
# Loop twice over the current page,
# since starting in the middle.
for page in (pages[i:] + pages[:i+1]):
self._set_pattern(page)
try:
# Return match in page before position.
row, doc, span = page.project.find_previous(row, doc, pos)
return self._set_success_state(page, row, doc, span, next=False)
except StopIteration:
target = gaupol.conf.search.target
if target == gaupol.targets.CURRENT:
# Fail wrapped single-page search.
return self._set_failure_state()
# Proceed to the previous page.
row = doc = pos = None
# Fail wrapped search of all pages.
self._set_failure_state()
def _read_history(self, name):
"""Read history from file of type `name`."""
directory = os.path.join(aeidon.CONFIG_HOME_DIR, "search")
path = os.path.join(directory, "{}.history".format(name))
if not os.path.isfile(path): return
history = aeidon.util.readlines(path)
setattr(self, name, history)
@page_changing
@aeidon.deco.silent(gaupol.Default)
def replace(self):
"""Replace the current match of pattern."""
page = self.application.get_current_page()
if page is not self._match_page: return
self._set_replacement(page)
subtitle = page.project.subtitles[self._match_row]
length = len(subtitle.get_text(self._match_doc))
try:
page.project.replace()
except re.error as error:
return self._show_regex_error_dialog_replacement(str(error))
shift = (len(subtitle.get_text(self._match_doc)) - length)
self._match_span[1] += shift
if self._was_next:
return self.next()
return self.previous()
@page_changing
@aeidon.deco.silent(gaupol.Default)
def replace_all(self):
"""Replace all matches of pattern."""
count = 0
target = gaupol.conf.search.target
for page in self.application.get_target_pages(target):
self._set_pattern(page)
self._set_replacement(page)
try:
count += page.project.replace_all()
except re.error as error:
self._show_regex_error_dialog_replacement(str(error))
break
self._reset_properties()
self._statuslabel.flash_text(aeidon.i18n.ngettext(
"Found and replaced {:d} occurence",
"Found and replaced {:d} occurences",
count).format(count))
def _reset_properties(self):
"""Reset search properties to defaults."""
self._match_page = None
self._match_doc = None
self._match_row = None
self._match_span = None
self._text_view.get_buffer().set_text("")
self._text_view.set_sensitive(False)
def _set_failure_state(self):
"""Set search properties for failure to find a match."""
self._reset_properties()
pattern = self._pattern_entry.get_text()
message = _('"{}" not found').format(pattern)
self._statuslabel.flash_text(message)
def _set_pattern(self, page):
"""
Set search pattern for `page`.
Raise :exc:`gaupol.Default` if pattern empty or bad.
"""
pattern = self._pattern_entry.get_text()
gaupol.util.raise_default(not pattern)
ignore_case = gaupol.conf.search.ignore_case
if not gaupol.conf.search.regex:
self._add_pattern_to_history()
return page.project.set_search_string(pattern, ignore_case)
flags = re.DOTALL | re.MULTILINE
if gaupol.conf.search.ignore_case:
flags = flags | re.IGNORECASE
try:
page.project.set_search_regex(pattern, flags)
except re.error as error:
self._show_regex_error_dialog_pattern(str(error))
raise gaupol.Default
self._add_pattern_to_history()
def _set_replacement(self, page):
"""Set search replacement for `page`."""
replacement = self._replacement_entry.get_text()
page.project.set_search_replacement(replacement)
self._add_replacement_to_history()
def _set_success_state(self, page, row, doc, match_span, next):
"""Set search properties for found match."""
self._match_page = page
self._match_row = row
self._match_doc = doc
self._match_span = list(match_span)
self._was_next = next
self.application.set_current_page(page)
self._set_text(page, row, doc, match_span)
col = page.document_to_text_column(doc)
page.view.set_focus(row, col)
page.view.scroll_to_row(row)
self._replace_button.set_sensitive(True)
def _set_text(self, page, row, doc, match_span):
"""Set subtitle text to text view."""
text_buffer = self._text_view.get_buffer()
subtitle = page.project.subtitles[row]
text = subtitle.get_text(doc)
text_buffer.set_text(text)
ins = text_buffer.get_iter_at_offset(match_span[0])
bound = text_buffer.get_iter_at_offset(match_span[1])
text_buffer.select_range(ins, bound)
mark = text_buffer.create_mark(None, bound, True)
self._text_view.scroll_to_mark(mark=mark,
within_margin=0,
use_align=False,
xalign=0.5,
yalign=0.5)
self._text_view.set_sensitive(True)
self._text_view.grab_focus()
def _show_regex_error_dialog_pattern(self, message):
"""Show an error dialog if regex pattern failed to compile."""
title = _("Error in regular expression pattern")
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 _show_regex_error_dialog_replacement(self, message):
"""Show an error dialog if regex replacement is invalid."""
title = _("Error in regular expression replacement")
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 _update_search_targets(self):
"""Update search targets in all pages."""
docs = list(map(gaupol.util.text_field_to_document,
gaupol.conf.search.fields))
wrap = (gaupol.conf.search.target != gaupol.targets.ALL)
for page in self.application.pages:
page.project.set_search_target(None, docs, wrap)
def _write_history(self, name):
"""Write history to file of type `name`."""
directory = os.path.join(aeidon.CONFIG_HOME_DIR, "search")
with aeidon.util.silent(OSError):
path = os.path.join(directory, "{}.history".format(name))
history = getattr(self, name)
text = "\n".join(history) + "\n"
aeidon.util.write(path, text)
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