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gnome-shell/js/misc/inputMethod.js
Carlos Garnacho ecc3cf8ab1 inputMethod: Manually reset input context state before unfocus 
The IBusInputContext currently seems to be a bit sloppy wrt propagating
the current state to engines after those are changed, this results in
engines possibly ending with purpose/hint/etc that do not actually
correspond to the current state.

Ensure this state is cleared on unfocus of our IBusInputContext, so
that the next time the input method receives an input focus, the new
state makes it all the way to the currently active engine.

Fixes situations in the GDM/lock screen password entry that IBus
would miss the PASSWORD hint set on the StEntry, and let passwords
be fed to engines.

Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/5966
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2512>
2022-10-26 10:00:37 +00:00

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
/* exported InputMethod */
const { Clutter, GLib, Gio, GObject, IBus } = imports.gi;
const Keyboard = imports.ui.status.keyboard;
const Main = imports.ui.main;
Gio._promisify(IBus.Bus.prototype,
'create_input_context_async', 'create_input_context_async_finish');
Gio._promisify(IBus.InputContext.prototype,
'process_key_event_async', 'process_key_event_async_finish');
var HIDE_PANEL_TIME = 50;
var InputMethod = GObject.registerClass({
Signals: {
'surrounding-text-set': {},
'terminal-mode-changed': {},
},
}, class InputMethod extends Clutter.InputMethod {
_init() {
super._init();
this._hints = 0;
this._purpose = 0;
this._currentFocus = null;
this._preeditStr = '';
this._preeditPos = 0;
this._preeditAnchor = 0;
this._preeditVisible = false;
this._hidePanelId = 0;
this.terminalMode = false;
this._ibus = IBus.Bus.new_async();
this._ibus.connect('connected', this._onConnected.bind(this));
this._ibus.connect('disconnected', this._clear.bind(this));
this.connect('notify::can-show-preedit', this._updateCapabilities.bind(this));
this._inputSourceManager = Keyboard.getInputSourceManager();
this._sourceChangedId = this._inputSourceManager.connect('current-source-changed',
this._onSourceChanged.bind(this));
this._currentSource = this._inputSourceManager.currentSource;
if (this._ibus.is_connected())
this._onConnected();
}
get currentFocus() {
return this._currentFocus;
}
_updateCapabilities() {
let caps = IBus.Capabilite.PREEDIT_TEXT | IBus.Capabilite.FOCUS | IBus.Capabilite.SURROUNDING_TEXT;
if (Main.keyboard.visible)
caps |= IBus.Capabilite.OSK;
if (this._context)
this._context.set_capabilities(caps);
}
_onSourceChanged() {
this._currentSource = this._inputSourceManager.currentSource;
}
async _onConnected() {
this._cancellable = new Gio.Cancellable();
try {
this._context = await this._ibus.create_input_context_async(
'gnome-shell', -1, this._cancellable);
} catch (e) {
if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED)) {
logError(e);
this._clear();
}
return;
}
this._context.set_client_commit_preedit(true);
this._context.connect('commit-text', this._onCommitText.bind(this));
this._context.connect('delete-surrounding-text', this._onDeleteSurroundingText.bind(this));
this._context.connect('update-preedit-text-with-mode', this._onUpdatePreeditText.bind(this));
this._context.connect('show-preedit-text', this._onShowPreeditText.bind(this));
this._context.connect('hide-preedit-text', this._onHidePreeditText.bind(this));
this._context.connect('forward-key-event', this._onForwardKeyEvent.bind(this));
this._context.connect('destroy', this._clear.bind(this));
Main.keyboard.connectObject('visibility-changed', () => this._updateCapabilities());
this._updateCapabilities();
}
_clear() {
Main.keyboard.disconnectObject(this);
if (this._cancellable) {
this._cancellable.cancel();
this._cancellable = null;
}
this._context = null;
this._hints = 0;
this._purpose = 0;
this._preeditStr = '';
this._preeditPos = 0;
this._preeditAnchor = 0;
this._preeditVisible = false;
}
_emitRequestSurrounding() {
if (this._context.needs_surrounding_text())
this.emit('request-surrounding');
}
_onCommitText(_context, text) {
this.commit(text.get_text());
}
_onDeleteSurroundingText(_context, offset, nchars) {
try {
this.delete_surrounding(offset, nchars);
} catch (e) {
// We may get out of bounds for negative offset on older mutter
this.delete_surrounding(0, nchars + offset);
}
}
_onUpdatePreeditText(_context, text, pos, visible, mode) {
if (text == null)
return;
let preedit = text.get_text();
if (preedit === '')
preedit = null;
const anchor = pos;
if (visible)
this.set_preedit_text(preedit, pos, anchor, mode);
else if (this._preeditVisible)
this.set_preedit_text(null, pos, anchor, mode);
this._preeditStr = preedit;
this._preeditPos = pos;
this._preeditAnchor = anchor;
this._preeditVisible = visible;
this._preeditCommitMode = mode;
}
_onShowPreeditText() {
this._preeditVisible = true;
this.set_preedit_text(
this._preeditStr, this._preeditPos, this._preeditAnchor,
this._preeditCommitMode);
}
_onHidePreeditText() {
this.set_preedit_text(
null, this._preeditPos, this._preeditAnchor,
this._preeditCommitMode);
this._preeditVisible = false;
}
_onForwardKeyEvent(_context, keyval, keycode, state) {
let press = (state & IBus.ModifierType.RELEASE_MASK) == 0;
state &= ~IBus.ModifierType.RELEASE_MASK;
let curEvent = Clutter.get_current_event();
let time;
if (curEvent)
time = curEvent.get_time();
else
time = global.display.get_current_time_roundtrip();
this.forward_key(keyval, keycode + 8, state & Clutter.ModifierType.MODIFIER_MASK, time, press);
}
vfunc_focus_in(focus) {
this._currentFocus = focus;
if (this._context) {
this._context.focus_in();
this._emitRequestSurrounding();
}
if (this._hidePanelId) {
GLib.source_remove(this._hidePanelId);
this._hidePanelId = 0;
}
}
vfunc_focus_out() {
this._currentFocus = null;
if (this._context) {
this._fullReset();
this._context.focus_out();
}
if (this._preeditStr && this._preeditVisible) {
// Unset any preedit text
this.set_preedit_text(null, 0, 0, this._preeditCommitMode);
this._preeditStr = null;
}
this._hidePanelId = GLib.timeout_add(GLib.PRIORITY_DEFAULT, HIDE_PANEL_TIME, () => {
this.set_input_panel_state(Clutter.InputPanelState.OFF);
this._hidePanelId = 0;
return GLib.SOURCE_REMOVE;
});
}
vfunc_reset() {
if (this._context) {
this._context.reset();
this._emitRequestSurrounding();
}
this._surroundingText = null;
this._surroundingTextCursor = null;
this._preeditStr = null;
this._setTerminalMode(false);
}
vfunc_set_cursor_location(rect) {
if (this._context) {
this._cursorRect = {
x: rect.get_x(), y: rect.get_y(),
width: rect.get_width(), height: rect.get_height(),
};
this._context.set_cursor_location(
this._cursorRect.x, this._cursorRect.y,
this._cursorRect.width, this._cursorRect.height);
this._emitRequestSurrounding();
}
}
vfunc_set_surrounding(text, cursor, anchor) {
this._surroundingText = text;
this._surroundingTextCursor = cursor;
this.emit('surrounding-text-set');
if (!this._context || !text)
return;
let ibusText = IBus.Text.new_from_string(text);
this._context.set_surrounding_text(ibusText, cursor, anchor);
}
vfunc_update_content_hints(hints) {
let ibusHints = 0;
if (hints & Clutter.InputContentHintFlags.COMPLETION)
ibusHints |= IBus.InputHints.WORD_COMPLETION;
if (hints & Clutter.InputContentHintFlags.SPELLCHECK)
ibusHints |= IBus.InputHints.SPELLCHECK;
if (hints & Clutter.InputContentHintFlags.AUTO_CAPITALIZATION)
ibusHints |= IBus.InputHints.UPPERCASE_SENTENCES;
if (hints & Clutter.InputContentHintFlags.LOWERCASE)
ibusHints |= IBus.InputHints.LOWERCASE;
if (hints & Clutter.InputContentHintFlags.UPPERCASE)
ibusHints |= IBus.InputHints.UPPERCASE_CHARS;
if (hints & Clutter.InputContentHintFlags.TITLECASE)
ibusHints |= IBus.InputHints.UPPERCASE_WORDS;
this._hints = ibusHints;
if (this._context)
this._context.set_content_type(this._purpose, this._hints);
}
vfunc_update_content_purpose(purpose) {
let ibusPurpose = 0;
if (purpose == Clutter.InputContentPurpose.NORMAL)
ibusPurpose = IBus.InputPurpose.FREE_FORM;
else if (purpose == Clutter.InputContentPurpose.ALPHA)
ibusPurpose = IBus.InputPurpose.ALPHA;
else if (purpose == Clutter.InputContentPurpose.DIGITS)
ibusPurpose = IBus.InputPurpose.DIGITS;
else if (purpose == Clutter.InputContentPurpose.NUMBER)
ibusPurpose = IBus.InputPurpose.NUMBER;
else if (purpose == Clutter.InputContentPurpose.PHONE)
ibusPurpose = IBus.InputPurpose.PHONE;
else if (purpose == Clutter.InputContentPurpose.URL)
ibusPurpose = IBus.InputPurpose.URL;
else if (purpose == Clutter.InputContentPurpose.EMAIL)
ibusPurpose = IBus.InputPurpose.EMAIL;
else if (purpose == Clutter.InputContentPurpose.NAME)
ibusPurpose = IBus.InputPurpose.NAME;
else if (purpose == Clutter.InputContentPurpose.PASSWORD)
ibusPurpose = IBus.InputPurpose.PASSWORD;
else if (purpose === Clutter.InputContentPurpose.TERMINAL &&
IBus.InputPurpose.TERMINAL)
ibusPurpose = IBus.InputPurpose.TERMINAL;
this._setTerminalMode(
purpose === Clutter.InputContentPurpose.TERMINAL);
this._purpose = ibusPurpose;
if (this._context)
this._context.set_content_type(this._purpose, this._hints);
}
_setTerminalMode(terminalMode) {
if (this.terminalMode !== terminalMode) {
this.terminalMode = terminalMode;
this.emit('terminal-mode-changed');
}
}
vfunc_filter_key_event(event) {
if (!this._context)
return false;
if (!this._currentSource)
return false;
let state = event.get_state();
if (state & IBus.ModifierType.IGNORED_MASK)
return false;
if (event.type() == Clutter.EventType.KEY_RELEASE)
state |= IBus.ModifierType.RELEASE_MASK;
this._context.process_key_event_async(
event.get_key_symbol(),
event.get_key_code() - 8, // Convert XKB keycodes to evcodes
state, -1, this._cancellable,
(context, res) => {
if (context != this._context)
return;
try {
let retval = context.process_key_event_async_finish(res);
this.notify_key_event(event, retval);
} catch (e) {
if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED))
log(`Error processing key on IM: ${e.message}`);
}
});
return true;
}
getSurroundingText() {
return [this._surroundingText, this._surroundingTextCursor];
}
hasPreedit() {
return this._preeditVisible && this._preeditStr !== '' && this._preeditStr !== null;
}
async handleVirtualKey(keyval) {
try {
if (!await this._context.process_key_event_async(
keyval, 0, 0, -1, null))
return false;
await this._context.process_key_event_async(
keyval, 0, IBus.ModifierType.RELEASE_MASK, -1, null);
return true;
} catch (e) {
return false;
}
}
_fullReset() {
this._context.set_content_type(0, 0);
this._context.set_cursor_location(0, 0, 0, 0);
this._context.set_capabilities(0);
this._context.reset();
}
update() {
if (!this._context)
return;
this._updateCapabilities();
this._context.set_content_type(this._purpose, this._hints);
this._context.set_cursor_location(
this._cursorRect.x, this._cursorRect.y,
this._cursorRect.width, this._cursorRect.height);
this._emitRequestSurrounding();
}
});
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