@oat-sa/tao-core-sdk/dist/core/history.js

Core libraries of TAO

define(['jquery'], function ($) { 'use strict';

    $ = $ && Object.prototype.hasOwnProperty.call($, 'default') ? $['default'] : $;

    /**
     * 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; under version 2
     * of the License (non-upgradable).
     *
     * 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, write to the Free Software
     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
     *
     * Copyright (c) 2013-2019 (original work) Open Assessment Technologies SA ;
     */
    const ns = 'history';

    /**
     * Browser history management
     * @exports core/history
     */
    const history = {
      /**
       * Some browsers have the backspace button configured to run window.history.back(); we will fix this awefull behavior.
       * The strategy is to prevent backspace everywhere except in text and editable elements.
       */
      fixBrokenBrowsers() {
        //to be completed if needed
        const enabledSelector = ['input', 'textarea', '[contenteditable=true]'].join(',');
        function preventBackSpace(e) {
          return e.keyCode !== 8;
        }
        function preventBackSpacePropag(e) {
          if (e.keyCode === 8 && !e.target.readonly && !e.target.disbaled) {
            e.stopPropagation();
          }
          return true;
        }
        $(document).off(`.${ns}`);
        $(document).off(`.${ns}`, enabledSelector);
        $(document).on(`keydown.${ns}`, preventBackSpace);
        $(document).on(`keypress.${ns}`, preventBackSpace);
        $(document).on(`keydown.${ns}`, enabledSelector, preventBackSpacePropag);
        $(document).on(`keypress.${ns}`, enabledSelector, preventBackSpacePropag);
      }
    };

    return history;

});