/*
 @licstart  The following is the entire license notice for the
 JavaScript code in this page.


 Copyright (C) 2013  neko259

 The JavaScript code in this page is free software: you can
 redistribute it and/or modify it under the terms of the GNU
 General Public License (GNU GPL) as published by the Free Software
 Foundation, either version 3 of the License, or (at your option)
 any later version.  The code is distributed WITHOUT ANY WARRANTY;
 without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the GNU GPL for more details.

 As additional permission under GNU GPL version 3 section 7, you
 may distribute non-source (e.g., minimized or compacted) forms of
 that code without the copy of the GNU GPL normally required by
 section 4, provided you include this license notice and a URL
 through which recipients can access the Corresponding Source.

 @licend  The above is the entire license notice
 for the JavaScript code in this page.
 */

/**
 * Add the desired characters to the start and end of selection.
 *
 * @param start Start (left) text
 * @param end End (right) text
 */
function addMarkToMsg(start, end) {
    var textareas = $('textarea');

    for (var i = 0; i < textareas.length; i++) {
        var textarea = textareas[i];

        if (document.selection) {
            textarea.focus();

            var sel = document.selection.createRange();
            sel.text = start + sel.text + end;
        } else if (textarea.selectionStart || textarea.selectionStart == '0') {
            textarea.focus();

            var startPos = textarea.selectionStart;
            var endPos = textarea.selectionEnd;

            var oldValue = textarea.value;
            textarea.value = oldValue.substring(0, startPos) + start +
                    oldValue.substring(startPos, endPos) + end +
                    oldValue.substring(endPos, oldValue.length);
        } else {
            textarea.value += start + end;
        }
    }

    return false;
}