/*
 * (c) Copyright Ascensio System SIA 2010-2024
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation. In accordance with
 * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
 * that Ascensio System SIA expressly excludes the warranty of non-infringement
 * of any third-party rights.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For
 * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
 * street, Riga, Latvia, EU, LV-1050.
 *
 * The  interactive user interfaces in modified source and object code versions
 * of the Program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU AGPL version 3.
 *
 * Pursuant to Section 7(b) of the License you must retain the original Product
 * logo when distributing the program. Pursuant to Section 7(e) we decline to
 * grant you any rights under trademark law for use of our trademarks.
 *
 * All the Product's GUI elements, including illustrations and icon sets, as
 * well as technical writing content are licensed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International. See the License
 * terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
 */


const helper = function() {
    let $elem;

    const set_enabled = function(enabled) {
        if ( enabled ) {
            if ( !$elem ) {
                if ( ($elem = $('div[aria-live]')).length == 0 ) {
                    const tmpl = '<div aria-live="assertive" class="sr-only" style=""></div>'
                    $elem = $(tmpl).appendTo($('body'));
                }
            }
        } else {
            if ( $elem ) {
                $elem.remove($elem);
                $elem = undefined;
            }
        }
    }

    const set_text_to_speech = function(text) {
        if ( !$elem ){
            set_enabled(true);
        }

        $elem.text('');
        setTimeout(function(e) {
            $elem.text(text);
        }, 0);
    }

    return {
        setEnabled: set_enabled,
        disable: function() { set_enabled(false); },
        speech: set_text_to_speech,
    }
}

!window.Common && (window.Common = {});
!Common.Utils && (Common.Utils = {});

Common.Utils.ScreeenReaderHelper = new helper();