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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:54:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:54:43 +0000
commite4283f6d48b98e764b988b43bbc86b9d52e6ec94 (patch)
treec8f7f7a6c2f5faa2942d27cefc6fd46cca492656 /js/ui/focusCaretTracker.js
parentInitial commit. (diff)
downloadgnome-shell-e4283f6d48b98e764b988b43bbc86b9d52e6ec94.tar.xz
gnome-shell-e4283f6d48b98e764b988b43bbc86b9d52e6ec94.zip
Adding upstream version 43.9.upstream/43.9upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/ui/focusCaretTracker.js')
-rw-r--r--js/ui/focusCaretTracker.js91
1 files changed, 91 insertions, 0 deletions
diff --git a/js/ui/focusCaretTracker.js b/js/ui/focusCaretTracker.js
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+/** -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+ * Copyright 2012 Inclusive Design Research Centre, OCAD University.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ * Joseph Scheuhammer <clown@alum.mit.edu>
+ * Contributor:
+ * Magdalen Berns <m.berns@sms.ed.ac.uk>
+ */
+/* exported FocusCaretTracker */
+
+const Atspi = imports.gi.Atspi;
+const Signals = imports.misc.signals;
+
+const CARETMOVED = 'object:text-caret-moved';
+const STATECHANGED = 'object:state-changed';
+
+var FocusCaretTracker = class FocusCaretTracker extends Signals.EventEmitter {
+ constructor() {
+ super();
+
+ this._atspiListener = Atspi.EventListener.new(this._onChanged.bind(this));
+
+ this._atspiInited = false;
+ this._focusListenerRegistered = false;
+ this._caretListenerRegistered = false;
+ }
+
+ _onChanged(event) {
+ if (event.type.indexOf(STATECHANGED) == 0)
+ this.emit('focus-changed', event);
+ else if (event.type == CARETMOVED)
+ this.emit('caret-moved', event);
+ }
+
+ _initAtspi() {
+ if (!this._atspiInited && Atspi.init() == 0) {
+ Atspi.set_timeout(250, 250);
+ this._atspiInited = true;
+ }
+
+ return this._atspiInited;
+ }
+
+ registerFocusListener() {
+ if (!this._initAtspi() || this._focusListenerRegistered)
+ return;
+
+ this._atspiListener.register(`${STATECHANGED}:focused`);
+ this._atspiListener.register(`${STATECHANGED}:selected`);
+ this._focusListenerRegistered = true;
+ }
+
+ registerCaretListener() {
+ if (!this._initAtspi() || this._caretListenerRegistered)
+ return;
+
+ this._atspiListener.register(CARETMOVED);
+ this._caretListenerRegistered = true;
+ }
+
+ deregisterFocusListener() {
+ if (!this._focusListenerRegistered)
+ return;
+
+ this._atspiListener.deregister(`${STATECHANGED}:focused`);
+ this._atspiListener.deregister(`${STATECHANGED}:selected`);
+ this._focusListenerRegistered = false;
+ }
+
+ deregisterCaretListener() {
+ if (!this._caretListenerRegistered)
+ return;
+
+ this._atspiListener.deregister(CARETMOVED);
+ this._caretListenerRegistered = false;
+ }
+};