3a92aa751f
In addition to checking the current settings, check also if the zoom region is active before registering the event listener. This way, we avoid DBus traffic for events we're not interested in. Also, make FocusCaretTracker resilient to multiple register/deregister calls (which can now happen). https://bugzilla.gnome.org/show_bug.cgi?id=724305
88 lines
2.8 KiB
JavaScript
88 lines
2.8 KiB
JavaScript
/** -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
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/*
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* Copyright 2012 Inclusive Design Research Centre, OCAD University.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author:
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* Joseph Scheuhammer <clown@alum.mit.edu>
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* Contributor:
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* Magdalen Berns <m.berns@sms.ed.ac.uk>
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*/
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const Atspi = imports.gi.Atspi;
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const Lang = imports.lang;
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const Signals = imports.signals;
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const CARETMOVED = 'object:text-caret-moved';
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const STATECHANGED = 'object:state-changed';
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const FocusCaretTracker = new Lang.Class({
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Name: 'FocusCaretTracker',
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_init: function() {
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Atspi.init();
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Atspi.set_timeout(250, 250);
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this._atspiListener = Atspi.EventListener.new(Lang.bind(this, this._onChanged));
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this._focusListenerRegistered = false;
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this._caretListenerRegistered = false;
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},
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_onChanged: function(event) {
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if (event.type.indexOf(STATECHANGED) == 0)
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this.emit('focus-changed', event);
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else if (event.type == CARETMOVED)
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this.emit('caret-moved', event);
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},
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registerFocusListener: function() {
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if (this._focusListenerRegistered)
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return;
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// Ignore the return value, we get an exception if they fail
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// And they should never fail
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this._atspiListener.register(STATECHANGED + ':focused');
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this._atspiListener.register(STATECHANGED + ':selected');
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this._focusListenerRegistered = true;
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},
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registerCaretListener: function() {
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if (this._caretListenerRegistered)
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return;
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this._atspiListener.register(CARETMOVED);
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this._caretListenerRegistered = true;
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},
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deregisterFocusListener: function() {
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if (!this._focusListenerRegistered)
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return;
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this._atspiListener.deregister(STATECHANGED + ':focused');
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this._atspiListener.deregister(STATECHANGED + ':selected');
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this._focusListenerRegistered = false;
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},
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deregisterCaretListener: function() {
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if (!this._caretListenerRegistered)
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return;
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this._atspiListener.deregister(CARETMOVED);
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this._caretListenerRegistered = false;
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}
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});
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Signals.addSignalMethods(FocusCaretTracker.prototype);
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