Refactored formatting panel code

boards/static/js/panel.js

@@ -1,120 +1,127 b''
 /*
  @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
  * @returns {boolean}
  */
 function addMarkToMsg(start, end) {
     if (end.length == 0) {
         return addTextToEachLineOfSelection(start);
     }
 
-    var textareas = document.getElementsByTagName('textarea');
+    var textareas = $('textarea');
 
     for (var i = 0; i < textareas.length; i++) {
         var textarea = textareas[i];
 
-        if( document.selection ) {
+        if (document.selection) {
             textarea.focus();
+
             var sel = document.selection.createRange();
             sel.text = start + sel.text + end;
-        } else if(textarea.selectionStart || textarea.selectionStart == '0') {
+        } else if (textarea.selectionStart || textarea.selectionStart == '0') {
             textarea.focus();
+
             var startPos = textarea.selectionStart;
             var endPos = textarea.selectionEnd;
-            textarea.value = textarea.value.substring(0, startPos) + start + textarea.value.substring(startPos, endPos) + end + textarea.value.substring( endPos, textarea.value.length );
+
+            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;
 }
 
 /**
  * Add text to the beginning of each selected line. Partially selected lines
  * are included
  * @param textToAdd
  * @returns {*}
  */
 function addTextToEachLineOfSelection(textToAdd) {
     var editor, end, newValue, start, value, _ref, _ref1;
     editor = document.getElementsByTagName('textarea')[0];
     _ref = [editor.selectionStart, editor.selectionEnd], start = _ref[0], end = _ref[1];
     if (start == null) {
         return;
     }
     if (start === end) {
         return;
     }
     console.log("Selection range: start=" + start + " end=" + end);
     value = editor.value;
     _ref1 = getLinesRange(start, end, value), start = _ref1[0], end = _ref1[1];
     newValue = replaceLines(start, end, value, textToAdd);
     return editor.value = newValue;
 }
 
 function replaceLines(start, end, value, textToAdd) {
     var line, replacedText, text;
     text = value.slice(start, end);
     replacedText = ((function() {
         var _i, _len, _ref, _results;
         _ref = text.split("\n");
         _results = [];
         for (_i = 0, _len = _ref.length; _i < _len; _i++) {
             line = _ref[_i];
             _results.push(textToAdd + line);
         }
         return _results;
     })()).join("\n");
     return replaceSubstring(start, end, value, replacedText);
 }
 
 function replaceSubstring(start, end, string, replacingString) {
     return string.slice(0, start) + replacingString + string.slice(end);
 }
 
 function getLinesRange(start, end, value) {
     var i, rangeEnd, rangeStart, _i, _j, _ref, _ref1;
     if (value[start] === "\n") {
         start = start - 1;
     }
     _ref = [start, end], rangeStart = _ref[0], rangeEnd = _ref[1];
     for (i = _i = start; start <= 0 ? _i <= 0 : _i >= 0; i = start <= 0 ? ++_i : --_i) {
         if (value[i] === "\n") {
             break;
         }
         rangeStart = i;
     }
     for (i = _j = end, _ref1 = value.length; end <= _ref1 ? _j < _ref1 : _j > _ref1; i = end <= _ref1 ? ++_j : --_j) {
         if (value[i] === "\n") {
             break;
         }
         rangeEnd = i;
     }
     return [rangeStart, rangeEnd];
-}
  No newline at end of file
+}