// 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 = "Bold text: [b]text[/b] (alt+b)";
i_help = "Italic text: [i]text[/i] (alt+i)";
u_help = "Underscore text: [u]text[/u] (alt+u)";
q_help = "Quote: [quote]text[/quote] (alt+q)";
c_help = "Program code: [code]source code[/code] (alt+c)";
l_help = "List: [list][*]text[/*][/list] (alt+l)";
o_help = "Custom list: [list=<1|a>][*]text[/*][/list] (alt+o)";
p_help = "Image: [img]http://address of the image[/img] (alt+p)";
w_help = "Link URL: [url]http://url[/url] or [url=http://url]Title[/url] (alt+w)";
a_help = "Close all bb_code tags";
s_help = "Color of text: [color=color_name]text[/color] You can use also color=#FF0000";
t_help = "Linetrought text: [s]text[/s] (alt+s)";
f_help = "Font size: [size=x]text[/size]";
le_help = "Left aligned text: [left]text[/left]";
ce_help = "Centered text: [center]text[/center]";
ri_help = "Right aligned text: [right]text[/right]";
fo_help = "Font of the text: [font=Arial]text[/font]";

// Define the bb_code 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]','[s]','[/s]','[left]','[/left]','[center]','[/center]','[right]','[/right]');
imageTag = false;

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

/**
* bbCode control by subBlue design [ www.subBlue.com ]
* Includes unixsafe colour palette selector by SHS`
*/

var baseHeight;
//onload_functions.push('initInsertions()');

/**
* Fix a bug involving the TextRange object. From
* http://www.frostjedi.com/terra/scripts/demo/caretBug.html
*/
function initInsertions()
{
	var doc;

	if (document.forms[form_name])
	{
		doc = document;
	}
	else
	{
		doc = opener.document;
	}

	var textarea = doc.forms[form_name].elements[text_name];

	if (is_ie && typeof(baseHeight) != 'number')
	{
		textarea.focus();
		baseHeight = doc.selection.createRange().duplicate().boundingHeight;

		if (!document.forms[form_name])
		{
			document.body.focus();
		}
	}
}

/**
* bbstyle
*/
function bbstyle(bbnumber)
{
	if (bbnumber != -1)
	{
		bbfontstyle(bbtags[bbnumber], bbtags[bbnumber+1]);
	}
	else
	{
		insert_text('[*]');
		document.forms[form_name].elements[text_name].focus();
	}
}

/**
* Apply bbcodes
*/
function bbfontstyle(bbopen, bbclose)
{
	theSelection = false;

	var textarea = document.forms[form_name].elements[text_name];

	textarea.focus();

	if ((clientVer >= 4) && is_ie && is_win)
	{
		// Get text selection
		theSelection = document.selection.createRange().text;

		if (theSelection)
		{
			// Add tags around selection
			document.selection.createRange().text = bbopen + theSelection + bbclose;
			document.forms[form_name].elements[text_name].focus();
			theSelection = '';
			return;
		}
	}
	else if (document.forms[form_name].elements[text_name].selectionEnd && (document.forms[form_name].elements[text_name].selectionEnd - document.forms[form_name].elements[text_name].selectionStart > 0))
	{
		mozWrap(document.forms[form_name].elements[text_name], bbopen, bbclose);
		document.forms[form_name].elements[text_name].focus();
		theSelection = '';
		return;
	}

	//The new position for the cursor after adding the bbcode
	var caret_pos = getCaretPosition(textarea).start;
	var new_pos = caret_pos + bbopen.length;

	// Open tag
	insert_text(bbopen + bbclose);

	// Center the cursor when we don't have a selection
	// Gecko and proper browsers
	if (!isNaN(textarea.selectionStart))
	{
		textarea.selectionStart = new_pos;
		textarea.selectionEnd = new_pos;
	}
	// IE
	else if (document.selection)
	{
		var range = textarea.createTextRange();
		range.move("character", new_pos);
		range.select();
		storeCaret(textarea);
	}

	textarea.focus();
	return;
}

/**
* Insert text at position
*/
function insert_text(text, spaces, popup)
{
	var textarea;

	if (!popup)
	{
		textarea = document.forms[form_name].elements[text_name];
	}
	else
	{
		textarea = opener.document.forms[form_name].elements[text_name];
	}
	if (spaces)
	{
		text = ' ' + text + ' ';
	}

	if (!isNaN(textarea.selectionStart))
	{
		var sel_start = textarea.selectionStart;
		var sel_end = textarea.selectionEnd;

		mozWrap(textarea, text, '')
		textarea.selectionStart = sel_start + text.length;
		textarea.selectionEnd = sel_end + text.length;
	}
	else if (textarea.createTextRange && textarea.caretPos)
	{
		if (baseHeight != textarea.caretPos.boundingHeight)
		{
			textarea.focus();
			storeCaret(textarea);
		}

		var caret_pos = textarea.caretPos;
		caret_pos.text = caret_pos.text.charAt(caret_pos.text.length - 1) == ' ' ? caret_pos.text + text + ' ' : caret_pos.text + text;
	}
	else
	{
		textarea.value = textarea.value + text;
	}
	if (!popup)
	{
		textarea.focus();
	}
}

/**
* Add inline attachment at position
*/
function attach_inline(index, filename)
{
	insert_text('[attachment=' + index + ']' + filename + '[/attachment]');
	document.forms[form_name].elements[text_name].focus();
}

/**
* Add quote text to message
*/
function addquote(post_id, username)
{
	var message_name = 'message_' + post_id;
	var theSelection = '';
	var divarea = false;

	if (document.all)
	{
		divarea = document.all[message_name];
	}
	else
	{
		divarea = document.getElementById(message_name);
	}

	// Get text selection - not only the post content :(
	if (window.getSelection)
	{
		theSelection = window.getSelection().toString();
	}
	else if (document.getSelection)
	{
		theSelection = document.getSelection();
	}
	else if (document.selection)
	{
		theSelection = document.selection.createRange().text;
	}

	if (theSelection == '' || typeof theSelection == 'undefined' || theSelection == null)
	{
		if (divarea.innerHTML)
		{
			theSelection = divarea.innerHTML.replace(/<br>/ig, '\n');
			theSelection = theSelection.replace(/<br\/>/ig, '\n');
			theSelection = theSelection.replace(/&lt\;/ig, '<');
			theSelection = theSelection.replace(/&gt\;/ig, '>');
			theSelection = theSelection.replace(/&amp\;/ig, '&');
			theSelection = theSelection.replace(/&nbsp\;/ig, ' ');
		}
		else if (document.all)
		{
			theSelection = divarea.innerText;
		}
		else if (divarea.textContent)
		{
			theSelection = divarea.textContent;
		}
		else if (divarea.firstChild.nodeValue)
		{
			theSelection = divarea.firstChild.nodeValue;
		}
	}

	if (theSelection)
	{
		insert_text('[quote="' + username + '"]' + theSelection + '[/quote]');
	}

	return;
}

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

	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;
	txtarea.selectionStart = selEnd + open.length + close.length;
	txtarea.selectionEnd = txtarea.selectionStart;
	txtarea.focus();
	txtarea.scrollTop = scrollTop;

	return;
}

/**
* Insert at Caret 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();
	}
}

/**
* Caret Position object
*/
function caretPosition()
{
	var start = null;
	var end = null;
}

/**
* Get the caret position in an textarea
*/
function getCaretPosition(txtarea)
{
	var caretPos = new caretPosition();

	// simple Gecko/Opera way
	if(txtarea.selectionStart || txtarea.selectionStart == 0)
	{
		caretPos.start = txtarea.selectionStart;
		caretPos.end = txtarea.selectionEnd;
	}
	// dirty and slow IE way
	else if(document.selection)
	{

		// get current selection
		var range = document.selection.createRange();

		// a new selection of the whole textarea
		var range_all = document.body.createTextRange();
		range_all.moveToElementText(txtarea);

		// calculate selection start point by moving beginning of range_all to beginning of range
		var sel_start;
		for (sel_start = 0; range_all.compareEndPoints('StartToStart', range) < 0; sel_start++)
		{
			range_all.moveStart('character', 1);
		}

		txtarea.sel_start = sel_start;

		// we ignore the end value for IE, this is already dirty enough and we don't need it
		caretPos.start = txtarea.sel_start;
		caretPos.end = txtarea.sel_start;
	}

	return caretPos;
}