// bbCode control by
// subBlue design
// www.subBlue.com

// Startup variables
var imageTag = false;
var theSelection = false;
//var openTag = false;

// Check for Browser & Platform for PC & IE specific bits
// More details from: http://www.mozilla.org/docs/web-developer/sniffer/browser_type.html
var clientPC = navigator.userAgent.toLowerCase(); // Get client info
var clientVer = parseInt(navigator.appVersion); // Get browser version

var is_ie = ((clientPC.indexOf("msie") != -1) && (clientPC.indexOf("opera") == -1));
var is_nav = ((clientPC.indexOf('mozilla')!=-1) && (clientPC.indexOf('spoofer')==-1)
                && (clientPC.indexOf('compatible') == -1) && (clientPC.indexOf('opera')==-1)
                && (clientPC.indexOf('webtv')==-1) && (clientPC.indexOf('hotjava')==-1));
var is_moz = 0;

var is_win = ((clientPC.indexOf("win")!=-1) || (clientPC.indexOf("16bit") != -1));
var is_mac = (clientPC.indexOf("mac")!=-1);

// Define the bbCode tags
//bbcode = new Array();
bbtags = new Array('[b]','[/b]','[i]','[/i]','[u]','[/u]','[url]','[/url]');
imageTag = false;


// Replacement for arrayname.length property
function getarraysize(thearray) {
	for (i = 0; i < thearray.length; i++) {
		if ((thearray[i] == "undefined") || (thearray[i] == "") || (thearray[i] == null))
			return i;
		}
	return thearray.length;
}

// Replacement for arrayname.push(value) not implemented in IE until version 5.5
// Appends element to the array
function arraypush(thearray,value) {
	thearray[ getarraysize(thearray) ] = value;
}

// Replacement for arrayname.pop() not implemented in IE until version 5.5
// Removes and returns the last element of an array
function arraypop(thearray) {
	thearraysize = getarraysize(thearray);
	retval = thearray[thearraysize - 1];
	delete thearray[thearraysize - 1];
	return retval;
}


function checkForm() {

	formErrors = false;

	if (document.post.message.value.length < 2) {
		formErrors = "Jūs turite ką nors parašyti";
	}

	if (formErrors) {
		alert(formErrors);
		return false;
	} else {
		bbstyle(-1);
		//formObj.preview.disabled = true;
		//formObj.submit.disabled = true;
		return true;
	}
}


function bbstyle(bbnumber, frm) {
	var txtarea = document.getElementById(frm);
	
	txtarea.focus();
	donotinsert = false;
	theSelection = false;
	bblast = 0;
	if (bbnumber == -1) { // Close all open tags & default button names
		while (eval(frm+'_array[0]')) {
			butnumber = arraypop(eval(frm+'_array')) - 1;
			txtarea.value += bbtags[butnumber + 1];
			buttext = eval('document.getElementById("'+frm+'_bbcode' + butnumber + '").value');
			eval('document.getElementById("'+frm+'_bbcode' + butnumber + '").value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
		}
		imageTag = false; // All tags are closed including image tags :D
		txtarea.focus();
		return;
	}

	if ((clientVer >= 4) && is_ie && is_win)
	{
		theSelection = document.selection.createRange().text; // Get text selection
		if (theSelection) {
			// Add tags around selection
			document.selection.createRange().text = bbtags[bbnumber] + theSelection + bbtags[bbnumber+1];
			txtarea.focus();
			theSelection = '';
			return;
		}
	}
	else if (txtarea.selectionEnd && (txtarea.selectionEnd - txtarea.selectionStart > 0))
	{
		mozWrap(txtarea, bbtags[bbnumber], bbtags[bbnumber+1]);
		return;
	}

	// Find last occurance of an open tag the same as the one just clicked
	for (i = 0; i < eval(frm+'_array.length'); i++) {
		if (eval(frm+'_array['+i+']') == bbnumber+1) {
			bblast = i;
			donotinsert = true;
		}
	}

	if (donotinsert) {		// Close all open tags up to the one just clicked & default button names
		while (eval(frm+'_array['+bblast+']')) {
				butnumber = arraypop(eval(frm+'_array')) - 1;
				txtarea.value += bbtags[butnumber + 1]+" ";
				buttext = eval('document.getElementById("'+frm+'_bbcode' + butnumber + '").value');
				eval('document.getElementById("'+frm+'_bbcode' + butnumber + '").value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
				eval(frm+'_openTag = false');
			}
			txtarea.focus();
			return;
	} else { // Open tags
		
		if (eval(frm+'_openTag') !== false) {
			txtarea.value += bbtags[eval(frm+'_openTag')+1]+" ";
			lastValue = arraypop(eval(frm+'_array')) - 1;	// Remove the close image tag from the list
			buttext = eval('document.getElementById("'+frm+'_bbcode' + eval(frm+'_openTag') + '").value');

			eval('document.getElementById("'+frm+'_bbcode' + eval(frm+'_openTag') + '").value ="' + buttext.substr(0,(buttext.length - 1)) + '"');	// Return button back to normal state
			eval(frm+'_openTag = false');
		}
		
		if (bbnumber === 0 || bbnumber == 2 || bbnumber == 4 || bbnumber == 6) {		// Close image tag before adding another
			eval(frm+'_openTag = ' + bbnumber);
		}

		// Open tag
		txtarea.value += bbtags[bbnumber];
		//if ((bbnumber == 14) && (imageTag == false)) imageTag = 1; // Check to stop additional tags after an unclosed image tag
		arraypush(eval(frm+'_array'),bbnumber+1);
		eval('document.getElementById("'+frm+'_bbcode'+bbnumber+'").value += "*"');
		txtarea.focus();
		return;
	}
	storeCaret(txtarea);
}

// From http://www.massless.org/mozedit/
function mozWrap(txtarea, open, close)
{
	var selLength = txtarea.textLength;
	var selStart = txtarea.selectionStart;
	var selEnd = txtarea.selectionEnd;
	if (selEnd == 1 || selEnd == 2)
		selEnd = selLength;

	var s1 = (txtarea.value).substring(0,selStart);
	var s2 = (txtarea.value).substring(selStart, selEnd)
	var s3 = (txtarea.value).substring(selEnd, selLength);
	txtarea.value = s1 + open + s2 + close + s3;
	return;
}

// Insert at Claret position. Code from
// http://www.faqts.com/knowledge_base/view.phtml/aid/1052/fid/130
function storeCaret(textEl) {
	if (textEl.createTextRange) textEl.caretPos = document.selection.createRange().duplicate();
}