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Community building forum software

Code is this:// Code by author: Aziz
// License: zlib/libpng
/* Functions for the "Split Quotes" feature: */

function COEM_enableSplitting(checkbox)
{
if (!window.$) return;
var textarea = $('#postmodify textarea.editor');
var handleEvent = COEM_enableSplitting.handler;
var un_bind = checkbox.checked?'bind':'unbind';
textarea[un_bind]('keyup', handleEvent)
[un_bind]('click', handleEvent);
}

COEM_enableSplitting.handler = function handleEvent(e) {
e = e || window.event;
if (e.keyCode == 13 && e.shiftKey || e.ctrlKey && e.button == 0)
COEM_splitTags();
}

function COEM_parseTags(text, endPos)
{ // [ name attrs | /name ]
var rx = /\[(?:([a-z]+)([^\]]*)|(\/[a-z]+))\]/gi;
var tagStack = [];
text = text.slice(0, endPos); // "m.index < endPos" doesn't seem to work.
while ((m = rx.exec(text)) /*&& m.index < endPos*/)
if (m[3]) // [/tagName]
tagStack.pop()
else
tagStack.push({"name":m[1], "attributes":m[2]}); // [tagName]
return tagStack;
}

function COEM_splitTags()
{ // Splits tags at the current cursor position.
var form = document.getElementById("postmodify");
var textarea = form.elements.namedItem("message");

var string = textarea.value;
var endPos = Math.min(textarea.selectionStart, string.length)
var tagStack = COEM_parseTags(string, endPos);

if (tagStack.length == 0)
return;

var tagText = "";

// Traverse in reverse and append closing tags.
for (var i = tagStack.length-1; i >= 0; i--)
tagText += '[/' + tagStack[i].name + "]\n";

var newCaretPos = tagText.length + tagStack.length;

for (var i = 0; i < tagStack.length; i++)
if (tag = tagStack[i])
tagText += '\n[' + tag.name + tag.attributes + "]";

COEM_replaceText(tagText, newCaretPos, textarea);
return false;
}

function COEM_replaceText(text, textCaretPos, textarea)
{
function setCaretToPos(input, pos) {
input.setSelectionRange(pos, pos);
}

function getSelectionStart(o) {
if (o.createTextRange) {
var r = document.selection.createRange().duplicate()
r.moveEnd('character', o.value.length)
return (r.text == '') ? o.value.length : o.value.lastIndexOf(r.text);
}
return o.selectionStart
}

// Attempt to create a text range (IE).
if (typeof(textarea.caretPos) != "undefined" && textarea.createTextRange)
{
var caretPos = textarea.caretPos;
var selStart = getSelectionStart(textarea); //textarea.selectionStart;
caretPos.text = caretPos.text.slice(-1) == ' ' ? text + ' ' : text;
setCaretToPos(textarea, selStart + textCaretPos);
}
// Mozilla text range replace.
else if (typeof(textarea.selectionStart) != "undefined")
{
var selStart = textarea.selectionStart;
var begin = textarea.value.substr(0, selStart);
var end = textarea.value.substr(textarea.selectionEnd);
var scrollPos = textarea.scrollTop;

textarea.value = begin + text + end;

if (textarea.setSelectionRange)
{
textarea.focus();
var newCaretPos = begin.length + textCaretPos - 1;
textarea.setSelectionRange(newCaretPos, newCaretPos);
}
textarea.scrollTop = scrollPos;
}
// Just put it on the end.
else
{
textarea.value += text;
textarea.focus(textarea.value.length - 1);
}
}
/* End of functions for the "Split Quotes" feature: */