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_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>', '<br>', '<br>',
'<img src=figuras/sorrindo.gif>','<img src=figuras/sorrindo.gif>',
'<img src=figuras/gargalhada.gif>','<img src=figuras/gargalhada.gif>',
'<img src=figuras/triste.gif>','<img src=figuras/triste.gif>',
'<img src=figuras/surpreso.gif>', '<img src=figuras/surpreso.gif>',
'<img src=figuras/surpreso1.gif>', '<img src=figuras/surpreso1.gif>',
'<img src=figuras/confuso.gif>','<img src=figuras/confuso.gif>',
'<img src=figuras/legal1.gif>','<img src=figuras/legal1.gif>',
'<img src=figuras/legal.gif>','<img src=figuras/legal.gif>',
'<img src=figuras/bravo.gif>', '<img src=figuras/bravo.gif>',
'<img src=figuras/rindo.gif>', '<img src=figuras/rindo.gif>',
'<img src=figuras/envergonhado.gif>','<img src=figuras/envergonhado.gif>',
'<img src=figuras/chorando.gif>','<img src=figuras/chorando.gif>',
'<img src=figuras/virando_olhos.gif>','<img src=figuras/virando_olhos.gif>',
'<img src=figuras/piscando.gif>', '<img src=figuras/piscando.gif>',
'<img src=figuras/neutro.gif>', '<img src=figuras/neutro.gif>',
'<img src=figuras/sadico.gif>', '<img src=figuras/sadico.gif>',
'<font size=3>', '</font>',
'<font color=red>', '</font>',
'<font color=green>', '</font>',
'<font color=blue>', '</font>',
'<font color=gold>', '</font>');
imageTag = false;

// Shows the help messages in the helpline window
function helpline(help) {
    document.post.helpbox.value = 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 bbstyle(bbnumber) {
    var txtarea = document.meditacao.texto;

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

    if (bbnumber == -1) { // Close all open tags & default button names
        while (bbcode[0]) {
            butnumber = arraypop(bbcode) - 1;
            txtarea.value += bbtags[butnumber + 1];
            buttext = eval('document.post.addbbcode' + butnumber + '.value');
            eval('document.post.addbbcode' + 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 < 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;
                txtarea.value += bbtags[butnumber + 1];
                buttext = eval('document.post.addbbcode' + butnumber + '.value');
                eval('document.post.addbbcode' + butnumber + '.value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
                imageTag = false;
            }
            txtarea.focus();
            return;
    } else { // Open tags

        if (imageTag && (bbnumber != 114)) {     // Close image tag before adding another
            txtarea.value += bbtags[115];
            lastValue = arraypop(bbcode) - 1;   // Remove the close image tag from the list
            document.post.addbbcode14.value = "Img";    // Return button back to normal state
            imageTag = false;
        }

        // Open tag
        txtarea.value += bbtags[bbnumber];
        if ((bbnumber == 114) && (imageTag == false)) imageTag = 1; // Check to stop additional tags after an unclosed image tag
        arraypush(bbcode,bbnumber+1);
        eval('document.post.addbbcode'+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();
}