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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 15:07:22 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 15:07:22 +0000 |
commit | f9d480cfe50ca1d7a0f0b5a2b8bb9932962bfbe7 (patch) | |
tree | ce9e8db2d4e8799780fa72ae8f1953039373e2ee /js/ui/focusCaretTracker.js | |
parent | Initial commit. (diff) | |
download | gnome-shell-upstream.tar.xz gnome-shell-upstream.zip |
Adding upstream version 3.38.6.upstream/3.38.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/ui/focusCaretTracker.js | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/js/ui/focusCaretTracker.js b/js/ui/focusCaretTracker.js new file mode 100644 index 0000000..cc70ae5 --- /dev/null +++ b/js/ui/focusCaretTracker.js @@ -0,0 +1,89 @@ +/** -*- 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> + */ + +const Atspi = imports.gi.Atspi; +const Signals = imports.signals; + +const CARETMOVED = 'object:text-caret-moved'; +const STATECHANGED = 'object:state-changed'; + +var FocusCaretTracker = class FocusCaretTracker { + constructor() { + 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; + } +}; +Signals.addSignalMethods(FocusCaretTracker.prototype); |