// Startup variables
var imageTag = false;
var theSelection = 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_win   = ((clientPC.indexOf("win")!=-1) || (clientPC.indexOf("16bit") != -1));
var is_mac    = (clientPC.indexOf("mac")!=-1);


// Helpline messages
b_help = "Texte gras: [b]texte[/b]";
i_help = "Texte italique: [i]texte[/i]";
u_help = "Texte souligné: [u]texte[/u]";
q_help = "Citation: [quote]texte cité[/quote]";
c_help = "Afficher du code: [code]code[/code]";
l_help = "Liste: [list]texte[/list] (alt+l)";
o_help = "Liste ordonnée: [list=]texte[/list]";
p_help = "Insérer une image: [img]http://image_url/[/img]";
w_help = "Insérer un lien: [url]http://url/[/url] ou [url=http://url/]Nom[/url]";
a_help = "Fermer toutes les balises BBCode ouvertes";
s_help = "Couleur du texte: [color=red]texte[/color]";
f_help = "Taille du texte: [size=x-small]texte en petit[/size]";
y_help = "Video YouTube: [youtube]http://youtube.com/watch?v=exemple_video[/youtube]";

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

// Shows the help messages in the helpline window
function helpline(help) {
	document.getElementById('helpbox').innerHTML = eval(help + "_help");
}


// 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 bbfontstyle(bbopen, bbclose) {
	if ((clientVer >= 4) && is_ie && is_win) {
		theSelection = document.selection.createRange().text;
		if (!theSelection) {
			document.getElementById('texte').value += bbopen + bbclose;
			document.getElementById('texte').focus();
			return;
		}
		document.selection.createRange().text = bbopen + theSelection + bbclose;
		document.getElementById('texte').focus();
		return;
	} else {
		document.getElementById('texte').value += bbopen + bbclose;
		document.getElementById('texte').focus();
		return;
	}
	storeCaret(document.getElementById('texte'));
}


function bbstyle(bbnumber) {
	var txtarea = document.getElementById('texte');
	txtarea.focus();

	donotinsert = false;
	theSelection = false;
	bblast = 0;

	if (bbnumber == -1) { // Close all open tags & default button names
		while (bbcode[0]) {
			butnumber = arraypop(bbcode) - 1;
			document.getElementById('texte').value += bbtags[butnumber + 1];
			buttext = eval('document.getElementById(\'addbbcode' + butnumber + '\').value');
			eval('document.getElementById(\'addbbcode' + butnumber + '\').value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
		}
		imageTag = false; // All tags are closed including image tags :D
		document.getElementById('texte').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];
		document.post.message.focus();
		theSelection = '';
		return;
	}

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

	if (donotinsert) {		// Close all open tags up to the one just clicked & default button names
		while (bbcode[bblast]) {
				butnumber = arraypop(bbcode) - 1;
				document.getElementById('texte').value += bbtags[butnumber + 1];
				buttext = eval('document.getElementById(\'addbbcode' + butnumber + '\').value');
				eval('document.getElementById(\'addbbcode' + butnumber + '\').value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
				imageTag = false;
			}
			document.getElementById('texte').focus();
			return;
	} else { // Open tags

		if (imageTag && (bbnumber != 14)) {		// Close image tag before adding another
			document.getElementById('texte').value += bbtags[15];
			lastValue = arraypop(bbcode) - 1;	// Remove the close image tag from the list
			document.getElementById('addbbcode14').value = "Img";	// Return button back to normal state
			imageTag = false;
		}

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

function storeCaret(textEl) {
	if (textEl.createTextRange) textEl.caretPos = document.selection.createRange().duplicate();
}