diff options
| -rw-r--r-- | ext/bg/js/page-exit-prevention.js | 60 | ||||
| -rw-r--r-- | ext/bg/js/settings.js | 46 | ||||
| -rw-r--r-- | ext/bg/settings.html | 1 |
3 files changed, 61 insertions, 46 deletions
diff --git a/ext/bg/js/page-exit-prevention.js b/ext/bg/js/page-exit-prevention.js new file mode 100644 index 00000000..aee4e3c2 --- /dev/null +++ b/ext/bg/js/page-exit-prevention.js @@ -0,0 +1,60 @@ +/* + * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net> + * Author: Alex Yatskov <alex@foosoft.net> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + + +class PageExitPrevention { + constructor() { + } + + start() { + PageExitPrevention._addInstance(this); + } + + end() { + PageExitPrevention._removeInstance(this); + } + + static _addInstance(instance) { + const size = PageExitPrevention._instances.size; + PageExitPrevention._instances.set(instance, true); + if (size === 0) { + window.addEventListener('beforeunload', PageExitPrevention._onBeforeUnload); + } + } + + static _removeInstance(instance) { + if ( + PageExitPrevention._instances.delete(instance) && + PageExitPrevention._instances.size === 0 + ) { + window.removeEventListener('beforeunload', PageExitPrevention._onBeforeUnload); + } + } + + static _onBeforeUnload(e) { + if (PageExitPrevention._instances.size === 0) { + return; + } + + e.preventDefault(); + e.returnValue = ''; + return ''; + } +} + +PageExitPrevention._instances = new Map(); diff --git a/ext/bg/js/settings.js b/ext/bg/js/settings.js index abe6f389..9e9604e2 100644 --- a/ext/bg/js/settings.js +++ b/ext/bg/js/settings.js @@ -223,52 +223,6 @@ $(document).ready(() => onReady()); /* - * Page exit prevention - */ - -class PageExitPrevention { - constructor() { - } - - start() { - PageExitPrevention._addInstance(this); - } - - end() { - PageExitPrevention._removeInstance(this); - } - - static _addInstance(instance) { - const size = PageExitPrevention._instances.size; - PageExitPrevention._instances.set(instance, true); - if (size === 0) { - window.addEventListener('beforeunload', PageExitPrevention._onBeforeUnload); - } - } - - static _removeInstance(instance) { - if ( - PageExitPrevention._instances.delete(instance) && - PageExitPrevention._instances.size === 0 - ) { - window.removeEventListener('beforeunload', PageExitPrevention._onBeforeUnload); - } - } - - static _onBeforeUnload(e) { - if (PageExitPrevention._instances.size === 0) { - return; - } - - e.preventDefault(); - e.returnValue = ''; - return ''; - } -} -PageExitPrevention._instances = new Map(); - - -/* * Appearance */ diff --git a/ext/bg/settings.html b/ext/bg/settings.html index 908c618c..9edb48e5 100644 --- a/ext/bg/settings.html +++ b/ext/bg/settings.html @@ -876,6 +876,7 @@ <script src="/bg/js/dictionary.js"></script> <script src="/bg/js/handlebars.js"></script> <script src="/bg/js/options.js"></script> + <script src="/bg/js/page-exit-prevention.js"></script> <script src="/bg/js/profile-conditions.js"></script> <script src="/bg/js/templates.js"></script> <script src="/bg/js/util.js"></script> |