// Cross-Browser Rich Text Editor
// http://www.kevinroth.com/rte/demo.htm
// Written by Kevin Roth (kevin@NOSPAMkevinroth.com - remove NOSPAM)
// Visit the support forums at http://www.kevinroth.com/forums/index.php?c=2
// This code is public domain. Redistribution and use of this code, with or without modification, is permitted.

//init variables
var isRichText = false;
var rng;
var currentRTE;
var allRTEs = "";

var isIE;
var isGecko;
var isSafari;
var isKonqueror;

var imagesPath;
var includesPath;
var cssFile;
var generateXHTML;

var lang = "en";
//var encoding = "iso-8859-1";
var encoding = "Cp1252";


function initRTE(imgPath, incPath, css, genXHTML)
{
    //set browser vars
    var ua = navigator.userAgent.toLowerCase();
    isIE = ((ua.indexOf("msie") != -1) && (ua.indexOf("opera") == -1) && (ua.indexOf("webtv") == -1)); 
    isGecko = (ua.indexOf("gecko") != -1);
    isSafari = (ua.indexOf("safari") != -1);
    isKonqueror = (ua.indexOf("konqueror") != -1);
    
    generateXHTML = genXHTML;
    
    //check to see if designMode mode is available
    //Safari/Konqueror think they are designMode capable even though they are not
    if (document.getElementById && document.designMode && !isSafari && !isKonqueror)
	{
        isRichText = true;
    }
    
    if (isIE)
	{
        document.onmouseover = raiseButton;
        document.onmouseout  = normalButton;
        document.onmousedown = lowerButton;
        document.onmouseup   = raiseButton;
    }
    
    //set paths vars
    imagesPath = imgPath;
    includesPath = incPath;
    cssFile = css;
    
    if (isRichText) document.writeln('<style type="text/css">@import "' + includesPath + 'rte.css";</style>');
    
    //for testing standard textarea, uncomment the following line
    //isRichText = false;
}

function writeRichText(rte, html, width, height, buttons, readOnly)
{
    if (isRichText) 
	{
        if (allRTEs.length > 0) allRTEs += ";";
        allRTEs += rte;
        
        if (readOnly) buttons = false;
        
        //adjust minimum table widths
        if (isIE) 
		{
//            if (buttons && (width < 540)) width = 540;
            var tablewidth = width;
        }
		else 
		{
//            if (buttons && (width < 540)) width = 540;
            var tablewidth = width + 4;
        }
        
        document.writeln('<div class="rteDiv">');
        if (buttons == true)
		{
            document.writeln('<table class="rteBack" cellpadding="0" cellspacing="0" id="Buttons2_' + rte + '" width="' + tablewidth + '">');
            document.writeln('  <tr>');
            document.writeln('      <td><img id="bold" class="rteImage" src="' + imagesPath + 'bold.gif" width="25" height="24" alt="Bold" title="Bold" onClick="rteCommand(\'' + rte + '\', \'bold\', \'\')"></td>');
            document.writeln('      <td><img class="rteImage" src="' + imagesPath + 'italic.gif" width="25" height="24" alt="Italic" title="Italic" onClick="rteCommand(\'' + rte + '\', \'italic\', \'\')"></td>');
            document.writeln('      <td><img class="rteImage" src="' + imagesPath + 'underline.gif" width="25" height="24" alt="Underline" title="Underline" onClick="rteCommand(\'' + rte + '\', \'underline\', \'\')"></td>');
            document.writeln('      <td><img class="rteImage" src="' + imagesPath + 'hyperlink.gif" width="25" height="24" alt="Insert Link" title="Insert Link" onClick="dlgInsertLink(\'' + rte + '\', \'link\')"></td>');
            document.writeln('      <td width="100%"></td>');
            document.writeln('  </tr>');
            document.writeln('</table>');
        }
        document.writeln('<iframe id="' + rte + '" name="' + rte + '" width="' + width + 'px" height="' + height + 'px" src="' + includesPath + 'blank.htm"></iframe>');
        document.writeln('<iframe width="154" height="104" id="cp' + rte + '" src="' + includesPath + 'palette.htm" marginwidth="0" marginheight="0" scrolling="no" style="visibility:hidden; position: absolute;"></iframe>');
        document.writeln('<input type="hidden" id="hdn' + rte + '" name="' + rte + '" value="">');
        document.writeln('</div>');
        
        document.getElementById('hdn' + rte).value = html;
        enableDesignMode(rte, html, readOnly);
    }
	else 
	{
        if (!readOnly) 
		{
            document.writeln('<textarea name="' + rte + '" id="' + rte + '" style="width: ' + width + 'px; height: ' + height + 'px;">' + html + '</textarea>');
        }
		else 
		{
            document.writeln('<textarea name="' + rte + '" id="' + rte + '" style="width: ' + width + 'px; height: ' + height + 'px;" readonly>' + html + '</textarea>');
        }
    }
}

function enableDesignMode(rte, html, readOnly)
{
    var frameHtml = "<html id=\"" + rte + "\">\n";
    frameHtml += "<head>\n";
    //to reference your stylesheet, set href property below to your stylesheet path and uncomment
    if (cssFile.length > 0)
	{
        frameHtml += "<link media=\"all\" type=\"text/css\" href=\"" + cssFile + "\" rel=\"stylesheet\">\n";
    }
	else
	{
        frameHtml += "<style>\n";
        frameHtml += "body {\n";
        frameHtml += "  background: #FFFFFF;\n";
		frameHtml += "	font-family: Arial, Helvetica, sans-serif;\n";
		frameHtml += "	font-size: 12px;\n";
		frameHtml += "  margin: 0px;\n";
        frameHtml += "  padding: 0px;\n";
        frameHtml += "}\n";
        frameHtml += "</style>\n";
    }
    frameHtml += "</head>\n";
    frameHtml += "<body>\n";
    frameHtml += html + "\n";
    frameHtml += "</body>\n";
    frameHtml += "</html>";
    
    if (document.all)
	{
        var oRTE = frames[rte].document;
        oRTE.open();
        oRTE.write(frameHtml);
        oRTE.close();
        if (!readOnly) 
		{
            oRTE.designMode = "On";
            frames[rte].document.attachEvent("onkeypress", function evt_ie_keypress(event) {ieKeyPress(event, rte);});
        }
    } 
	else 
	{
        try 
		{
            if (!readOnly) document.getElementById(rte).contentDocument.designMode = "on";
            try 
			{
                var oRTE = document.getElementById(rte).contentWindow.document;
                oRTE.open();
                oRTE.write(frameHtml);
                oRTE.close();
                if (isGecko && !readOnly) 
				{
                    //attach a keyboard handler for gecko browsers to make keyboard shortcuts work
                    oRTE.addEventListener("keypress", geckoKeyPress, true);
                }
            }
			catch (e) 
			{
                alert("Error preloading content.");
            }
        }
		catch (e) 
		{
            //gecko may take some time to enable design mode.
            //Keep looping until able to set.
            if (isGecko) 
			{
                setTimeout("enableDesignMode('" + rte + "', '" + html + "', " + readOnly + ");", 10);
            } 
			else 
			{
                return false;
            }
        }
    }
}

function updateRTE(rte)
{
    if (!isRichText) return;
    
    //check for readOnly mode
    var readOnly = false;
    if (document.all) 
	{
        if (frames[rte].document.designMode != "On") readOnly = true;
    }
	else 
	{
        if (document.getElementById(rte).contentDocument.designMode != "on") readOnly = true;
    }
    
    if (isRichText && !readOnly)
	{
        //if viewing source, switch back to design view
//        if (document.getElementById("chkSrc" + rte).checked) document.getElementById("chkSrc" + rte).click();
        setHiddenVal(rte);
    }
}

function setHiddenVal(rte) 
{
    //set hidden form field value for current rte
    var oHdnField = document.getElementById('hdn' + rte);
    
    //convert html output to xhtml (thanks Timothy Bell and Vyacheslav Smolin!)
    if (oHdnField.value == null) oHdnField.value = "";
    if (document.all) 
	{
        if (generateXHTML) 
		{
            oHdnField.value = get_xhtml(frames[rte].document.body, lang, encoding);
        }
		else 
		{
            oHdnField.value = frames[rte].document.body.innerHTML;
        }
    } 
	else 
	{
        if (generateXHTML)
		{
            oHdnField.value = get_xhtml(document.getElementById(rte).contentWindow.document.body, lang, encoding);
        } 
		else 
		{
            oHdnField.value = document.getElementById(rte).contentWindow.document.body.innerHTML;
        }
    }
    
    //if there is no content (other than formatting) set value to nothing
    if (stripHTML(oHdnField.value.replace("&nbsp;", " ")) == "" &&
        oHdnField.value.toLowerCase().search("<hr") == -1 &&
        oHdnField.value.toLowerCase().search("<img") == -1) oHdnField.value = "";
}

function updateRTEs()
{
    var vRTEs = allRTEs.split(";");
    for (var i = 0; i < vRTEs.length; i++)
	{
        updateRTE(vRTEs[i]);
    }
}

function rteCommand(rte, command, option)
{
    //function to perform command
    var oRTE;
    if (document.all)
	{
        oRTE = frames[rte];
    }
	else 
	{
        oRTE = document.getElementById(rte).contentWindow;
    }
    
    try
	{
        oRTE.focus();
        oRTE.document.execCommand(command, false, option);
        oRTE.focus();
    }
	catch (e)
	{
//      alert(e);
//      setTimeout("rteCommand('" + rte + "', '" + command + "', '" + option + "');", 10);
    }
}

function dlgInsertLink(rte, command) 
{
    //function to open/close insert table dialog
    //save current values
    parent.command = command;
    currentRTE = rte;
    InsertLink = popUpWin(includesPath + 'insert_link.htm', 'InsertLink', 360, 180, '');
    
    //get currently highlighted text and set link text value
    setRange(rte);
    var linkText = '';
    if (isIE) 
	{
        linkText = stripHTML(rng.htmlText);
    } 
	else 
	{
        linkText = stripHTML(rng.toString());
    }
    setLinkText(linkText);
}

function setLinkText(linkText)
{
    //set link text value in insert link dialog
    try 
	{
        window.InsertLink.document.linkForm.linkText.value = linkText;
    }
	catch (e) 
	{
        //may take some time to create dialog window.
        //Keep looping until able to set.
        setTimeout("setLinkText('" + linkText + "');", 10);
    }
}

function popUpWin (url, win, width, height, options) 
{
    var leftPos = (screen.availWidth - width) / 2;
    var topPos = (screen.availHeight - height) / 2;
    options += 'width=' + width + ',height=' + height + ',left=' + leftPos + ',top=' + topPos;
    return window.open(url, win, options);
}

// Ernst de Moor: Fix the amount of digging parents up, in case the RTE editor itself is displayed in a div.
// KJR 11/12/2004 Changed to position palette based on parent div, so palette will always appear in proper location regardless of nested divs
function getOffsetTop(elm) {
    var mOffsetTop = elm.offsetTop;
    var mOffsetParent = elm.offsetParent;
    var parents_up = 2; //the positioning div is 2 elements up the tree
    
    while(parents_up > 0) {
        mOffsetTop += mOffsetParent.offsetTop;
        mOffsetParent = mOffsetParent.offsetParent;
        parents_up--;
    }
    
    return mOffsetTop;
}

// Ernst de Moor: Fix the amount of digging parents up, in case the RTE editor itself is displayed in a div.
// KJR 11/12/2004 Changed to position palette based on parent div, so palette will always appear in proper location regardless of nested divs
function getOffsetLeft(elm) {
    var mOffsetLeft = elm.offsetLeft;
    var mOffsetParent = elm.offsetParent;
    var parents_up = 2;
    
    while(parents_up > 0) {
        mOffsetLeft += mOffsetParent.offsetLeft;
        mOffsetParent = mOffsetParent.offsetParent;
        parents_up--;
    }
    
    return mOffsetLeft;
}

function insertHTML(html)
{
    //function to add HTML -- thanks dannyuk1982
    var rte = currentRTE;
    
    var oRTE;
    if (document.all) 
	{
        oRTE = frames[rte];
    }
	else 
	{
        oRTE = document.getElementById(rte).contentWindow;
    }
    
    oRTE.focus();
    if (document.all) 
	{
        var oRng = oRTE.document.selection.createRange();
        oRng.pasteHTML(html);
        oRng.collapse(false);
        oRng.select();
    } 
	else 
	{
        oRTE.document.execCommand('insertHTML', false, html);
    }
}

function showHideElement(element, showHide)
{
    //function to show or hide elements
    //element variable can be string or object
    if (document.getElementById(element)) 
	{
        element = document.getElementById(element);
    }
    
    if (showHide == "show") 
	{
        element.style.visibility = "visible";
    }
	else if (showHide == "hide")
	{
        element.style.visibility = "hidden";
    }
}

function setRange(rte)
{
    //function to store range of current selection
    var oRTE;
    if (document.all)
	{
        oRTE = frames[rte];
        var selection = oRTE.document.selection; 
        if (selection != null) rng = selection.createRange();
    }
	else
	{
        oRTE = document.getElementById(rte).contentWindow;
        var selection = oRTE.getSelection();
        rng = selection.getRangeAt(selection.rangeCount - 1).cloneRange();
    }
    return rng;
}

function stripHTML(oldString)
{
    //function to strip all html
    var newString = oldString.replace(/(<([^>]+)>)/ig,"");
    
    //replace carriage returns and line feeds
   newString = newString.replace(/\r\n/g," ");
   newString = newString.replace(/\n/g," ");
   newString = newString.replace(/\r/g," ");
    
    //trim string
    newString = trim(newString);
    
    return newString;
}

function trim(inputString) 
{
   // Removes leading and trailing spaces from the passed string. Also removes
   // consecutive spaces and replaces it with one space. If something besides
   // a string is passed in (null, custom object, etc.) then return the input.
   if (typeof inputString != "string") return inputString;
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
    
   while (ch == " ")
   { // Check for spaces at the beginning of the string
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length - 1, retValue.length);
    
   while (ch == " ") 
   { // Check for spaces at the end of the string
      retValue = retValue.substring(0, retValue.length - 1);
      ch = retValue.substring(retValue.length - 1, retValue.length);
   }
    
    // Note that there are two spaces in the string - look for multiple spaces within the string
   while (retValue.indexOf("  ") != -1) 
   {
      // Again, there are two spaces in each of the strings
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ") + 1, retValue.length);
   }
   return retValue; // Return the trimmed string back to the user
}

//********************
//Gecko-Only Functions
//********************
function geckoKeyPress(evt)
{
    //function to add bold, italic, and underline shortcut commands to gecko RTEs
    //contributed by Anti Veeranna (thanks Anti!)
    var rte = evt.target.id;
    
    if (evt.ctrlKey)
	{
        var key = String.fromCharCode(evt.charCode).toLowerCase();
        var cmd = '';
        switch (key)
		{
            case 'b': cmd = "bold"; break;
            case 'i': cmd = "italic"; break;
            case 'u': cmd = "underline"; break;
        };

        if (cmd) 
		{
            rteCommand(rte, cmd, null);
            
            // stop the event bubble
            evt.preventDefault();
            evt.stopPropagation();
        }
    }
}

//*****************
//IE-Only Functions
//*****************
function ieKeyPress(evt, rte)
{
    var key = (evt.which || evt.charCode || evt.keyCode);
    var stringKey = String.fromCharCode(key).toLowerCase();
    
//the following breaks list and indentation functionality in IE (don't use)
  switch (key) {
      case 13:
          //insert <br> tag instead of <p>
          //change the key pressed to null
          evt.keyCode = 0;
          
          //insert <br> tag
          currentRTE = rte;
          insertHTML('<br>');
          break;
  };
}

function raiseButton(e)
{
    var el = window.event.srcElement;
    
    className = el.className;
    if (className == 'rteImage' || className == 'rteImageLowered')
	{
        el.className = 'rteImageRaised';
    }
}

function normalButton(e) 
{
    var el = window.event.srcElement;
    
    className = el.className;
    if (className == 'rteImageRaised' || className == 'rteImageLowered')
	{
        el.className = 'rteImage';
    }
}

function lowerButton(e) 
{
    var el = window.event.srcElement;
    
    className = el.className;
    if (className == 'rteImage' || className == 'rteImageRaised')
	{
        el.className = 'rteImageLowered';
    }
}