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-rw-r--r--js/misc/inputMethod.js285
1 files changed, 285 insertions, 0 deletions
diff --git a/js/misc/inputMethod.js b/js/misc/inputMethod.js
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+++ b/js/misc/inputMethod.js
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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;
+
+Gio._promisify(IBus.Bus.prototype,
+ 'create_input_context_async', 'create_input_context_async_finish');
+
+var HIDE_PANEL_TIME = 50;
+
+var InputMethod = GObject.registerClass(
+class InputMethod extends Clutter.InputMethod {
+ _init() {
+ super._init();
+ this._hints = 0;
+ this._purpose = 0;
+ this._currentFocus = null;
+ this._preeditStr = '';
+ this._preeditPos = 0;
+ this._preeditVisible = false;
+ this._hidePanelId = 0;
+ 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 (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.connect('commit-text', this._onCommitText.bind(this));
+ this._context.connect('delete-surrounding-text', this._onDeleteSurroundingText.bind(this));
+ this._context.connect('update-preedit-text', 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));
+
+ this._updateCapabilities();
+ }
+
+ _clear() {
+ if (this._cancellable) {
+ this._cancellable.cancel();
+ this._cancellable = null;
+ }
+
+ this._context = null;
+ this._hints = 0;
+ this._purpose = 0;
+ this._preeditStr = '';
+ this._preeditPos = 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) {
+ if (text == null)
+ return;
+
+ let preedit = text.get_text();
+
+ if (visible)
+ this.set_preedit_text(preedit, pos);
+ else if (this._preeditVisible)
+ this.set_preedit_text(null, pos);
+
+ this._preeditStr = preedit;
+ this._preeditPos = pos;
+ this._preeditVisible = visible;
+ }
+
+ _onShowPreeditText() {
+ this._preeditVisible = true;
+ this.set_preedit_text(this._preeditStr, this._preeditPos);
+ }
+
+ _onHidePreeditText() {
+ this.set_preedit_text(null, this._preeditPos);
+ 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._context.focus_out();
+
+ if (this._preeditStr) {
+ // Unset any preedit text
+ this.set_preedit_text(null, 0);
+ 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();
+ }
+
+ if (this._preeditStr) {
+ // Unset any preedit text
+ this.set_preedit_text(null, 0);
+ this._preeditStr = null;
+ }
+ }
+
+ vfunc_set_cursor_location(rect) {
+ if (this._context) {
+ this._context.set_cursor_location(rect.get_x(), rect.get_y(),
+ rect.get_width(), rect.get_height());
+ this._emitRequestSurrounding();
+ }
+ }
+
+ vfunc_set_surrounding(text, cursor, anchor) {
+ 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;
+
+ this._purpose = ibusPurpose;
+ if (this._context)
+ this._context.set_content_type(this._purpose, this._hints);
+ }
+
+ 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;
+ }
+});