/*
**    File: widgEdit.js
**    Created by: Cameron Adams (http://www.themaninblue.com/)
**    Created on: 2005-01-16
**    Last modified: 2005-03-09
**
**
**
**
**    License Information:
**    -------------------------------------------------------------------------
**    Copyright (C) 2005 Cameron Adams
**
**    This program is free software; you can redistribute it and/or modify it
**    under the terms of the GNU General Public License as published by the
**    Free Software Foundation; either version 2 of the License, or (at your
**    option) any later version.
**
**    This program is distributed in the hope that it will be useful, but
**    WITHOUT ANY WARRANTY; without even the implied warranty of
**    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**    General Public License for more details.
**
**    You should have received a copy of the GNU General Public License along
**    with this program; if not, write to the Free Software Foundation, Inc.,
**    59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**
**
**
**
**    Purpose:
**    -------------------------------------------------------------------------
**
**    Replaces all textareas (class="widgEditor") in a HTML document with
**    enhanced editing windows to allow basic HTML formatting in a WYSIWYG
**    manner.
**
**
**
**
**    Function list:
**    -------------------------------------------------------------------------
**
**    run()
**
**    widgInit()
**
**    widgEditor(replacedTextareaID)
**    widtEditor.cleanPaste()
**    widgEditor.cleanSource()
**    widgEditor.convertSPANs(theSwitch)
**    widgEditor.detectPaste(e)
**    widgEditor.initEdit()
**    widgEditor.insertNewParagraph()
**    widgEditor.modifyFormSubmit()
**    widgEditor.paragraphise()
**    widgEditor.refreshDisplay()
**    widgEditor.switchMode()
**    widgEditor.updateWidgInput()
**    widgEditor.writeDocument()
**
**    widgToolbar()
**    widgToolbar.addButton(theID, theClass, theLabel, theAction)
**    widgToolbar.addSelect(theID, theClass, theContentArray, theAction)
**    widgToolbar.disable()
**    widgToolbar.enable()
**    widgToolbar.setState(theState, theStatus)
**
**    widgToolbarAction()
**
**    widgToolbarCheckState(theWidgEditor, resubmit)
**
**    widgToolbarMouseover()
**updateWidgInput
**    acceptableChildren(theNode)
**
**    changeNodeType(theNode, nodeType)
**
**    replaceNodeWithChildren()
**
**    String.addClass(theClass)
**    String.classExists(theClass)
**    String.isAcceptedElementName()
**    String.isInlineName()
**    String.removeClass(theClass)
**    String.reverse()
**    String.validTags()
*/




/******************************************************************************
**    CONFIGURATION VARIABLES
******************************************************************************/

/* Location of stylesheet file for editor content */
var widgStylesheet = "/stylesheets/widgContent.css";

/* Items to appear in toolbar. */
var widgToolbarItems = new Array();

widgToolbarItems.push("bold");
widgToolbarItems.push("italic");

widgToolbarItems.push("unorderedlist");
widgToolbarItems.push("orderedlist");

/* If widgInsertParagraphs = true, when content is submitted paragraphs will be
** inserted around text without a parent element. Mozilla does not
** automatically do this, so if this is set to false you will end up with some
** plain text blocks. Uses a double <br /> as a pargraph marker.
*/

var widgInsertParagraphs = true;

/* If widgAutoClean = true, when content is pasted into the WYSIWYG view, it
** will automatically be cleaned. If widgAutoClean = false, the user will be
** prompted as to whether they wish to clean the content.
*/

var widgAutoClean = true;

/******************************************************************************
**    END CONFIGURATION
******************************************************************************/

var widgEditor_instances = new Array();


function widg_init_single(id) {
    setTimeout("widgEditor_instances['" + id + "'] = new widgEditor('" + id + "')", 50 );
}


function widgInit()
{
    /* Detects if designMode is available, and also if browser is IE or Mozilla (excludes Safari) */
    if (typeof(document.designMode) == "string" && (document.all || document.designMode == "off"))
    {
        var theTextareas = document.getElementsByTagName("textarea");

        for (var i = 0; i < theTextareas.length; i++)
        {
            var theTextarea = theTextareas[i];

            if (theTextarea.className.classExists("widgEditor"))
            {
                if (theTextarea.id == "")
                {
                    theTextarea.id = theTextarea.name;
                }


                setTimeout("new widgEditor('" + theTextarea.id + "')", 500 * (i));
            }
        }
    }
    else
    {
        return false;
    }

    return true;
}




function widgEditor(replacedTextareaID)
{
    var self = this;

    this.theTextarea = document.getElementById(replacedTextareaID);
    this.theContainer = document.createElement("div");
    this.theIframe = document.createElement("iframe");
    this.theInput = document.createElement("input");
    this.theExtraInput = document.createElement("input");
    this.IE = false;
    this.locked = true;
    this.pasteCache = "";
    this.wysiwyg = true;

    if (document.all)
    {
        this.IE = true;
    }

    if (this.theTextarea.id == null)
    {
        this.theTextarea.id = this.theTextarea.name;
    }

    this.theTextarea.style.visibility = "hidden";

    /* Modify DOM objects for editor */
    this.theContainer.id = this.theTextarea.id + "WidgContainer";
    this.theContainer.className = "widgContainer";

    this.theIframe.id = this.theTextarea.id + "WidgIframe";
    this.theIframe.className = "widgIframe text_input";
    this.theIframe.frameBorder = 0;

    this.theInput.type = "hidden";
    this.theInput.id = this.theTextarea.id;
    this.theInput.name = this.theTextarea.name;
    this.theInput.value = this.theTextarea.value;

    this.theToolbar = new widgToolbar(this);

    /* An extra input to determine if the submitted data is from the normal textarea or from the widgEditor */
    this.theExtraInput.type = "hidden";
    this.theExtraInput.id = this.theTextarea.id + "WidgEditor";
    this.theExtraInput.name = this.theTextarea.name + "WidgEditor";
    this.theExtraInput.value = "true";

    this.theTextarea.id += "WidgTextarea";
    this.theTextarea.name += "WidgTextarea";

    this.theContainer.appendChild(this.theToolbar.theList);
    this.theContainer.appendChild(this.theIframe);
    this.theContainer.appendChild(this.theInput);
    this.theContainer.appendChild(this.theExtraInput);
    this.theContainer.style.visibility = "hidden";

    this.theInput.widgEditorObject = this;

    this.theTextarea.parentNode.replaceChild(this.theContainer, this.theTextarea);

    /* Fill editor with old textarea content */
    this.writeDocument(this.theInput.value);


    /* Make editor editable */
    this.initEdit();

    /* Attach onsubmit to parent form */
    //this.modifyFormSubmit();

    return true;
}




/* Clean pasted content */
widgEditor.prototype.cleanPaste = function()
{
    if (widgAutoClean || confirm("Do you wish to clean the HTML source of the content you just pasted?"))
    {
        var matchedHead = "";
        var matchedTail = "";
        var newContent = this.theIframe.contentWindow.document.getElementsByTagName("body")[0].innerHTML;
        var newContentStart = 0;
        var newContentFinish = 0;
        var newSnippet = "";
        var tempNode = document.createElement("div");

        /* Find start of both strings that matches */
        for (newContentStart = 0; newContent.charAt(newContentStart) == this.pasteCache.charAt(newContentStart); newContentStart++)
        {
            matchedHead += this.pasteCache.charAt(newContentStart);
        }

        /* If newContentStart is inside a HTML tag, move to opening brace of tag */
        for (var i = newContentStart; i >= 0; i--)
        {
            if (this.pasteCache.charAt(i) == "<")
            {
                newContentStart = i;
                matchedHead = this.pasteCache.substring(0, newContentStart);

                break;
            }
            else if(this.pasteCache.charAt(i) == ">")
            {
                break;
            }
        }

        newContent = newContent.reverse();
        this.pasteCache = this.pasteCache.reverse();

        /* Find end of both strings that matches */
        for (newContentFinish = 0; newContent.charAt(newContentFinish) == this.pasteCache.charAt(newContentFinish); newContentFinish++)
        {
            matchedTail += this.pasteCache.charAt(newContentFinish);
        }

        /* If newContentFinish is inside a HTML tag, move to closing brace of tag */
        for (var i = newContentFinish; i >= 0; i--)
        {
            if (this.pasteCache.charAt(i) == ">")
            {
                newContentFinish = i;
                matchedTail = this.pasteCache.substring(0, newContentFinish);

                break;
            }
            else if(this.pasteCache.charAt(i) == "<")
            {
                break;
            }
        }

        matchedTail = matchedTail.reverse();

        /* If there's no difference in pasted content */
        if (newContentStart == newContent.length - newContentFinish)
        {
            return false;
        }

        newContent = newContent.reverse();
        newSnippet = newContent.substring(newContentStart, newContent.length - newContentFinish);
        newSnippet = newSnippet.validTags();

        /* Replace opening bold tags with strong */
        newSnippet = newSnippet.replace(/<b(\s+|>)/g, "<strong$1");
        /* Replace closing bold tags with closing strong */
        newSnippet = newSnippet.replace(/<\/b(\s+|>)/g, "</strong$1");

        /* Replace italic tags with em */
        newSnippet = newSnippet.replace(/<i(\s+|>)/g, "<em$1");
        /* Replace closing italic tags with closing em */
        newSnippet = newSnippet.replace(/<\/i(\s+|>)/g, "</em$1");

        /* Strip out unaccepted attributes */
        newSnippet = newSnippet.replace(/<[^>]*>/g, function(match)
            {
                match = match.replace(/ ([^=]+)="[^"]*"/g, function(match2, attributeName)
                    {
                        if (attributeName == "alt" || attributeName == "href" || attributeName == "src" || attributeName == "title")
                        {
                            return match2;
                        }

                        return "";
                    });

                return match;
            }
            );

        tempNode.innerHTML = newSnippet;

        acceptableChildren(tempNode);

        this.theInput.value = matchedHead + tempNode.innerHTML + matchedTail;

        /* Final cleanout for MS Word cruft */
        this.theInput.value = this.theInput.value.replace(/<\?xml[^>]*>/g, "");
        this.theInput.value = this.theInput.value.replace(/<[^ >]+:[^>]*>/g, "");
        this.theInput.value = this.theInput.value.replace(/<\/[^ >]+:[^>]*>/g, "");

        this.refreshDisplay();

        /* Convert semantics to spans in Mozilla */
        if (!this.IE)
        {
            this.convertSPANs();
        }
    }

    return true;
}




/* Clean the HTML code of the content area */
widgEditor.prototype.cleanSource = function()
{
    var theHTML = "";

    if (this.wysiwyg)
    {
        theHTML = this.theIframe.contentWindow.document.getElementsByTagName("body")[0].innerHTML;
    }
    else
    {
        theHTML = this.theTextarea.value;
    }

    theHTML = theHTML.validTags();

    /* Remove leading and trailing whitespace */
    theHTML = theHTML.replace(/^\s+/, "");
    theHTML = theHTML.replace(/\s+$/, "");

    /* Remove style attribute inside any tag */
    theHTML = theHTML.replace(/ style="[^"]*"/g, "");

    /* Replace improper BRs */
    theHTML = theHTML.replace(/<br>/g, "<br />");

    /* Remove BRs right before the end of blocks */
    theHTML = theHTML.replace(/<br \/>\s*<\/(h1|h2|h3|h4|h5|h6|li|p)/g, "</$1");

    /* Replace improper IMGs */
    theHTML = theHTML.replace(/(<img [^>]+[^\/])>/g, "$1 />");

    /* Remove empty tags */
    theHTML = theHTML.replace(/(<[^\/]>|<[^\/][^>]*[^\/]>)\s*<\/[^>]*>/g, "");

    if (this.wysiwyg)
    {
        this.theIframe.contentWindow.document.getElementsByTagName("body")[0].innerHTML = theHTML;
    }
    else
    {
        this.theTextarea.value = theHTML;
    }

    this.theInput.value = theHTML;

    return true;
}




widgEditor.prototype.convertSPANs = function(theSwitch)
{
    if (theSwitch)
    {
        /* Replace styled spans with their semantic equivalent */
        var theSPANs = this.theIframe.contentWindow.document.getElementsByTagName("span");

        while(theSPANs.length > 0)
        {
            var theChildren = new Array();
            var theReplacementElement = null;
            var theParentElement = null;

            for (var j = 0; j < theSPANs[0].childNodes.length; j++)
            {
                theChildren.push(theSPANs[0].childNodes[j].cloneNode(true));
            }

            /* Detect type of span style */

            switch (theSPANs[0].getAttribute("style"))
            {
                case "font-weight: bold;":
                    theReplacementElement = this.theIframe.contentWindow.document.createElement("strong");
                    theParentElement = theReplacementElement;

                    break;

                case "font-style: italic;":
                    theReplacementElement = this.theIframe.contentWindow.document.createElement("em");
                    theParentElement = theReplacementElement;

                    break;

                case "font-weight: bold; font-style: italic;":
                    theParentElement = this.theIframe.contentWindow.document.createElement("em");
                    theReplacementElement = this.theIframe.contentWindow.document.createElement("strong");
                    theReplacementElement.appendChild(theParentElement);

                    break;

                case "font-style: italic; font-weight: bold;":
                    theParentElement = this.theIframe.contentWindow.document.createElement("strong");
                    theReplacementElement = this.theIframe.contentWindow.document.createElement("em");
                    theReplacementElement.appendChild(theParentElement);

                    break;

                default:
                    replaceNodeWithChildren(theSPANs[0]);

                    break;
            }

            if (theReplacementElement != null)
            {
                for (var j = 0; j < theChildren.length; j++)
                {
                    theParentElement.appendChild(theChildren[j]);
                }

                theSPANs[0].parentNode.replaceChild(theReplacementElement, theSPANs[0]);
            }

            theSPANs = this.theIframe.contentWindow.document.getElementsByTagName("span");
        }
    }
    else
    {
        /* Replace em and strong tags with styled spans */
        var theEMs = this.theIframe.contentWindow.document.getElementsByTagName("em");

        while(theEMs.length > 0)
        {
            var theChildren = new Array();
            var theSpan = this.theIframe.contentWindow.document.createElement("span");

            theSpan.setAttribute("style", "font-style: italic;");

            for (var j = 0; j < theEMs[0].childNodes.length; j++)
            {
                theChildren.push(theEMs[0].childNodes[j].cloneNode(true));
            }

            for (var j = 0; j < theChildren.length; j++)
            {
                theSpan.appendChild(theChildren[j]);
            }

            theEMs[0].parentNode.replaceChild(theSpan, theEMs[0]);
            theEMs = this.theIframe.contentWindow.document.getElementsByTagName("em");
        }

        var theSTRONGs = this.theIframe.contentWindow.document.getElementsByTagName("strong");

        while(theSTRONGs.length > 0)
        {
            var theChildren = new Array();
            var theSpan = this.theIframe.contentWindow.document.createElement("span");

            theSpan.setAttribute("style", "font-weight: bold;");

            for (var j = 0; j < theSTRONGs[0].childNodes.length; j++)
            {
                theChildren.push(theSTRONGs[0].childNodes[j].cloneNode(true));
            }

            for (var j = 0; j < theChildren.length; j++)
            {
                theSpan.appendChild(theChildren[j]);
            }

            theSTRONGs[0].parentNode.replaceChild(theSpan, theSTRONGs[0]);
            theSTRONGs = this.theIframe.contentWindow.document.getElementsByTagName("strong");
        }
    }

    return true;
}




/* Check for pasted content */
widgEditor.prototype.detectPaste = function(e)
{
    var keyPressed = null;
    var theEvent = null;

    if (e)
    {
        theEvent = e;
    }
    else
    {
        theEvent = event;
    }

    if (theEvent.ctrlKey && theEvent.keyCode == 86 && this.wysiwyg)
    {
        var self = this;

        this.pasteCache = this.theIframe.contentWindow.document.getElementsByTagName("body")[0].innerHTML;

        /* Because Mozilla can't access the clipboard directly, must rely on timeout to check pasted differences in main content */
        setTimeout(function(){self.cleanPaste(); return true;}, 100);
    }

    return true;
}




/* Turn on document editing */
widgEditor.prototype.initEdit = function()
{
    var self = this;
    if (!this.IE) {
    try
    {
        this.theIframe.contentWindow.document.designMode = "on";
    }
    catch (e)
    {
        /* setTimeout needed to counteract Mozilla bug whereby you can't immediately change designMode on newly created iframes */
        setTimeout(function(){self.initEdit()}, 250);

        return false;
    }
    } else {
        this.theIframe.contentWindow.document.designMode = "on";
    }
    if (!this.IE)
    {
        this.convertSPANs(false);
    }

    this.theContainer.style.visibility = "visible";
    this.theTextarea.style.visibility = "visible";


    /* Mozilla event capturing */
    if (typeof document.addEventListener == "function")
    {
        this.theIframe.contentWindow.document.addEventListener("mouseup", function(){widgToolbarCheckState(self); return true;}, false);
        this.theIframe.contentWindow.document.addEventListener("keyup", function(){widgToolbarCheckState(self); return true;}, false);
        this.theIframe.contentWindow.document.addEventListener("keydown", function(e){self.detectPaste(e); return true;}, false);
    }
    /* IE event capturing */
    else
    {
        this.theIframe.contentWindow.document.attachEvent("onmouseup", function(){widgToolbarCheckState(self); return true;});
        this.theIframe.contentWindow.document.attachEvent("onkeyup", function(){widgToolbarCheckState(self); return true;});
        this.theIframe.contentWindow.document.attachEvent("onkeydown", function(e){self.detectPaste(e); return true;}, false);
    }

    this.locked = false;

    return true;
}




/* Add elements to a paragraph and inserts the paragraph before a given element in the body */
widgEditor.prototype.insertNewParagraph = function(elementArray, succeedingElement)
{
    var theBody = this.theIframe.contentWindow.document.getElementsByTagName("body")[0];
    var theParagraph = this.theIframe.contentWindow.document.createElement("p");

    for (var i = 0; i < elementArray.length; i++)
    {
        theParagraph.appendChild(elementArray[i]);
    }

    if (typeof(succeedingElement) != "undefined")
    {
        theBody.insertBefore(theParagraph, succeedingElement);
    }
    else
    {
        theBody.appendChild(theParagraph);
    }

    return true;
}




/* Add submit listener to parent form */
widgEditor.prototype.modifyFormSubmit = function()
{
    var self = this;
    var theForm = this.theContainer.parentNode;
    var oldOnsubmit = null;

    /* Find the parent form element */
    while (theForm.nodeName.toLowerCase() != "form")
    {
        theForm = theForm.parentNode;
    }

    /* Add onsubmit without overwriting existing function calls */
    oldOnsubmit = theForm.onsubmit;
    if (typeof theForm.onsubmit != "function")
    {
        theForm.onsubmit = function()
            {
                return self.updateWidgInput();
            }
    }
    else
    {
        theForm.onsubmit = function()
        {
            self.updateWidgInput();
            return oldOnsubmit();
        }
    }
    return true;
}




/* Format the HTML with paragraphs. Any parentless text is enclosed in a paragraph, double breaks are paragraph markers */
widgEditor.prototype.paragraphise = function()
{
    if (widgInsertParagraphs && this.wysiwyg)
    {
        var theBody = this.theIframe.contentWindow.document.getElementsByTagName("body")[0];

        /* Remove all text nodes containing just whitespace */
        for (var i = 0; i < theBody.childNodes.length; i++)
        {
            if (theBody.childNodes[i].nodeName.toLowerCase() == "#text" &&
                theBody.childNodes[i].data.search(/^\s*$/) != -1)
            {
                theBody.removeChild(theBody.childNodes[i]);

                i--;
            }
        }

        var removedElements = new Array();

        for (var i = 0; i < theBody.childNodes.length; i++)
        {
            if (theBody.childNodes[i].nodeName.isInlineName())
            {
                removedElements.push(theBody.childNodes[i].cloneNode(true));

                theBody.removeChild(theBody.childNodes[i]);

                i--;
            }
            else if (theBody.childNodes[i].nodeName.toLowerCase() == "br")
            {
                if (i + 1 < theBody.childNodes.length)
                {
                    /* If the current break tag is followed by another break tag */
                    if (theBody.childNodes[i + 1].nodeName.toLowerCase() == "br")
                    {
                        /* Remove consecutive break tags */
                        while (i < theBody.childNodes.length && theBody.childNodes[i].nodeName.toLowerCase() == "br")
                        {
                            theBody.removeChild(theBody.childNodes[i]);
                        }

                        if (removedElements.length > 0)
                        {
                            this.insertNewParagraph(removedElements, theBody.childNodes[i]);

                            removedElements = new Array();
                        }
                    }
                    /* If the break tag appears before a block element */
                    else if (!theBody.childNodes[i + 1].nodeName.isInlineName())
                    {
                        theBody.removeChild(theBody.childNodes[i]);
                    }
                    else if (removedElements.length > 0)
                    {
                        removedElements.push(theBody.childNodes[i].cloneNode(true));

                        theBody.removeChild(theBody.childNodes[i]);
                    }
                    else
                    {
                        theBody.removeChild(theBody.childNodes[i]);
                    }

                    i--;
                }
                else
                {
                    theBody.removeChild(theBody.childNodes[i]);
                }
            }
            else if (removedElements.length > 0)
            {
                this.insertNewParagraph(removedElements, theBody.childNodes[i]);

                removedElements = new Array();
            }
        }

        if (removedElements.length > 0)
        {
            this.insertNewParagraph(removedElements);
        }
    }

    return true;
}




/* Update hidden input to reflect editor contents, for submission */
widgEditor.prototype.refreshDisplay = function()
{
    if (this.wysiwyg)
    {
        this.theIframe.contentWindow.document.getElementsByTagName("body")[0].innerHTML = this.theInput.value;
    }
    else
    {
        this.theTextarea.value = this.theInput.value;
    }

    return true;
}




/* Switch between WYSIWYG and HTML source */
widgEditor.prototype.switchMode = function()
{
    if (!this.locked)
    {
        this.locked = true;

        /* Switch to HTML source */
        if (this.wysiwyg)
        {
            this.updateWidgInput();
            this.theTextarea.value = this.theInput.value;
            this.theContainer.replaceChild(this.theTextarea, this.theIframe);
            this.theToolbar.disable();
            this.wysiwyg = false;
            this.locked = false;
        }
        /* Switch to WYSIWYG */
        else
        {
            this.updateWidgInput();
            this.theContainer.replaceChild(this.theIframe, this.theTextarea);
            this.writeDocument(this.theInput.value);
            this.theToolbar.enable();
            this.initEdit();
            this.wysiwyg = true;
        }
    }

    return true;
}




/* Update hidden input to reflect editor contents, for submission */
widgEditor.prototype.updateWidgInput = function()
{
    if (this.wysiwyg)
    {
        /* Convert spans to semantics in Mozilla */
        if (!this.IE)
        {
            this.convertSPANs(true);
        }

        this.paragraphise();
        this.cleanSource();
    //    this.theInput.value = this.theIframe.contentWindow.document.getElementsByTagName("body")[0].innerHTML;

    }
    else
    {
        this.theInput.value = this.theTextarea.value;
    }

    return true;
}




/* Write initial content to editor */
widgEditor.prototype.writeDocument = function(documentContent)
{
    /* HTML template into which the HTML Editor content is inserted */
    var documentTemplate = "\
        <html>\
            <head>\
                <style type=\"text/css\">@import url(\"INSERT:STYLESHEET:END\");</style>\
            </head>\
            <body id=\"iframeBody\">\
                INSERT:CONTENT:END\
            </body>\
        </html>\
    ";

    /* Insert dynamic variables/content into document */
    documentTemplate = documentTemplate.replace(/INSERT:STYLESHEET:END/, widgStylesheet);
    documentTemplate = documentTemplate.replace(/INSERT:CONTENT:END/, documentContent);

    this.theIframe.contentWindow.document.open();
    this.theIframe.contentWindow.document.write(documentTemplate);
    this.theIframe.contentWindow.document.close();

    return true;
}




/* Toolbar items */
function widgToolbar(theEditor)
{
    var self = this;

    this.widgEditorObject = theEditor;

    /* Create toolbar ul element */
    this.theList = document.createElement("ul");
    this.theList.id = this.widgEditorObject.theInput.id + "WidgToolbar";
    this.theList.className = "widgToolbar";
    this.theList.widgToolbarObject = this;

    /* Create toolbar items */
    for (var i = 0; i < widgToolbarItems.length; i++)
    {
        switch (widgToolbarItems[i])
        {
            case "bold":
                this.addButton(this.theList.id + "ButtonBold", "widgButtonBold", "Bold", "bold");

                break;

            case "italic":
                this.addButton(this.theList.id + "ButtonItalic", "widgButtonItalic", "Italic", "italic");

                break;

            case "underline":
                this.addButton(this.theList.id + "ButtonUnderline", "widgButtonUnderline", "Underline", "underline");

                break;

            case "hyperlink":
                this.addButton(this.theList.id + "ButtonLink", "widgButtonLink", "Hyperlink", "link");

                break;

            case "unorderedlist":
                this.addButton(this.theList.id + "ButtonUnordered", "widgButtonUnordered", "Unordered List", "insertunorderedlist");

                break;

            case "orderedlist":
                this.addButton(this.theList.id + "ButtonOrdered", "widgButtonOrdered", "Ordered List", "insertorderedlist");

                break;

            case "image":
                this.addButton(this.theList.id + "ButtonImage", "widgButtonImage", "Insert Image", "image");

                break;

            case "htmlsource":
                this.addButton(this.theList.id + "ButtonHTML", "widgButtonHTML", "HTML Source", "html");

                break;

            case "blockformat":
                this.addSelect(this.theList.id + "SelectBlock", "widgSelectBlock", widgSelectBlockOptions, "formatblock");

                break;
        }
    }

    return true;
}





/* Add button to toolbar */
widgToolbar.prototype.addButton = function(theID, theClass, theLabel, theAction)
{
    var menuItem = document.createElement("li");
    var theLink = document.createElement("a");
    var theText = document.createTextNode(theLabel);

    menuItem.id = theID;
    menuItem.className = "widgEditButton";

    theLink.href = "#";
    theLink.title = theLabel;
    theLink.className = theClass;
    theLink.action = theAction;
    theLink.onclick = widgToolbarAction;
    theLink.onmouseover = widgToolbarMouseover;

    theLink.appendChild(theText);
    menuItem.appendChild(theLink);
    this.theList.appendChild(menuItem);

    return true;
}




/* Add select box to toolbar. theContentArray is an array of string pairs (option value, option label) */
widgToolbar.prototype.addSelect = function(theID, theClass, theContentArray, theAction)
{
    var menuItem = document.createElement("li");
    var theSelect = document.createElement("select");

    menuItem.className = "widgEditSelect";

    theSelect.id = theID;
    theSelect.name = theID;
    theSelect.className = theClass;
    theSelect.action = theAction;
    theSelect.onchange = widgToolbarAction;

    for (var i = 0; i < theContentArray.length; i += 2)
    {
        var theOption = document.createElement("option");
        var theText = document.createTextNode(theContentArray[i + 1]);

        theOption.value = theContentArray[i];

        theOption.appendChild(theText);
        theSelect.appendChild(theOption);
    }

    menuItem.appendChild(theSelect);
    this.theList.appendChild(menuItem);

    return true;
}




/* Turn off toolbar items */
widgToolbar.prototype.disable = function()
{
    /* Change class to disable buttons using CSS */
    this.theList.className += " widgSource";

    /* Loop through lis */
    for (var i = 0; i < this.theList.childNodes.length; i++)
    {
        var theChild = this.theList.childNodes[i];

        if (theChild.nodeName.toLowerCase() == "li" && theChild.className == "widgEditSelect")
        {
            /* Loop through li children to find select */
            for (j = 0; j < theChild.childNodes.length; j++)
            {
                if (theChild.childNodes[j].nodeName.toLowerCase() == "select")
                {
                    theChild.childNodes[j].disabled = "disabled";

                    break;
                }
            }
        }
    }

    return true;
}




/* Turn on toolbar items */
widgToolbar.prototype.enable = function()
{
    /* Change class to enable buttons using CSS */
    this.theList.className = this.theList.className.replace(/ widgSource/, "");

    /* Loop through lis */
    for (var i = 0; i < this.theList.childNodes.length; i++)
    {
        var theChild = this.theList.childNodes[i];

        if (theChild.nodeName.toLowerCase() == "li" && theChild.className == "widgEditSelect")
        {
            /* Loop through li children to find select */
            for (j = 0; j < theChild.childNodes.length; j++)
            {
                if (theChild.childNodes[j].nodeName.toLowerCase() == "select")
                {
                    theChild.childNodes[j].disabled = "";

                    break;
                }
            }
        }
    }

    return true;
}




/* Change the status of the selected toolbar item */
widgToolbar.prototype.setState = function(theState, theStatus)
{
    if (theState != "SelectBlock")
    {
        var theButton = document.getElementById(this.theList.id + "Button" + theState);

        if (theButton != null)
        {
            if (theStatus == "on")
            {
                theButton.className = theButton.className.addClass("on");
            }
            else
            {
                theButton.className = theButton.className.removeClass("on");
            }
        }
    }
    else
    {
        var theSelect = document.getElementById(this.theList.id + "SelectBlock");

        if (theSelect != null)
        {
            theSelect.value = "";
            theSelect.value = theStatus;
        }
    }

    return true;
}





/* Action taken when toolbar item activated */
function widgToolbarAction()
{
    var theToolbar = this.parentNode.parentNode.widgToolbarObject;
    var theWidgEditor = theToolbar.widgEditorObject;
    var theIframe = theWidgEditor.theIframe;
    var theSelection = "";

    /* If somehow a button other than "HTML source" is clicked while viewing HTML source, ignore click */
    if (!theWidgEditor.wysiwyg && this.action != "html")
    {
        return false;
    }

    switch (this.action)
    {
        case "formatblock":
            theIframe.contentWindow.document.execCommand(this.action, false, this.value);

            theWidgEditor.theToolbar.setState("SelectBlock", this.value);

            break;

        case "html":
            theWidgEditor.switchMode();

            break;

        case "link":
            if (this.parentNode.className.classExists("on"))
            {
                theIframe.contentWindow.document.execCommand("Unlink", false, null);
                theWidgEditor.theToolbar.setState("Link", "off");
            }
            else
            {
                if (theIframe.contentWindow.document.selection)
                {
                    theSelection = theIframe.contentWindow.document.selection.createRange().text;

                    if (theSelection == "")
                    {
                        alert("Please select the text you wish to hyperlink.");

                        break;
                    }
                }
                else
                {
                    theSelection = theIframe.contentWindow.getSelection();

                    if (theSelection == "")
                    {
                        alert("Please select the text you wish to hyperlink.");

                        break;
                    }
                }

                var theURL = prompt("Enter the URL for this link:", "http://");

                if (theURL != null)
                {
                    theIframe.contentWindow.document.execCommand("CreateLink", false, theURL);
                    theWidgEditor.theToolbar.setState("Link", "on");
                }
            }

            break;

        case "image":
            var theImage = prompt("Enter the location for this image:", "");

            if (theImage != null && theImage != "")
            {
                var theAlt = prompt("Enter the alternate text for this image:", "");
                var theSelection = null;
                var theRange = null;

                /* IE selections */
                if (theIframe.contentWindow.document.selection)
                {
                    /* Escape quotes in alt text */
                    theAlt = theAlt.replace(/"/g, "'");

                    theSelection = theIframe.contentWindow.document.selection;
                    theRange = theSelection.createRange();
                    theRange.collapse(false);
                    theRange.pasteHTML("<img alt=\"" + theAlt + "\" src=\"" + theImage + "\" />");

                    break;
                }
                /* Mozilla selections */
                else
                {
                    try
                    {
                        theSelection = theIframe.contentWindow.getSelection();
                    }
                    catch (e)
                    {
                        return false;
                    }

                    theRange = theSelection.getRangeAt(0);
                    theRange.collapse(false);

                    var theImageNode = theIframe.contentWindow.document.createElement("img");

                    theImageNode.src = theImage;
                    theImageNode.alt = theAlt;

                    theRange.insertNode(theImageNode);

                    break;
                }
            }
            else
            {
                return false;
            }

        default:
            theIframe.contentWindow.document.execCommand(this.action, false, null);

            var theAction = this.action.replace(/^./, function(match){return match.toUpperCase();});

            /* Turn off unordered toolbar item if ordered toolbar item was activated */
            if (this.action == "insertorderedlist")
            {
                theAction = "Ordered";
                theWidgEditor.theToolbar.setState("Unordered", "off");
            }

            /* Turn off ordered toolbar item if unordered toolbar item was activated */
            if (this.action == "insertunorderedlist")
            {
                theAction = "Unordered";
                theWidgEditor.theToolbar.setState("Ordered", "off");
            }

            /* If toolbar item was turned on */
            if (theIframe.contentWindow.document.queryCommandState(this.action, false, null))
            {
                theWidgEditor.theToolbar.setState(theAction, "on");
            }
            else
            {
                theWidgEditor.theToolbar.setState(theAction, "off");
            }
    }

    if (theWidgEditor.wysiwyg == true)
    {
        theIframe.contentWindow.focus();
    }
    else
    {
        theWidgEditor.theTextarea.focus();
    }

    return false;
}




/* Check the nesting of the current cursor position/selection */
function widgToolbarCheckState(theWidgEditor, resubmit)
{
    if (!resubmit)
    {
        /* Allow browser to update selection before using the selection */
        setTimeout(function(){widgToolbarCheckState(theWidgEditor, true); return true;}, 500);
    }

    var theSelection = null;
    var theRange = null;
    var theParentNode = null;
    var theLevel = 0;

    /* Turn off all the buttons */
    var menuListItems = theWidgEditor.theToolbar.theList.childNodes;
    for (var i = 0; i < menuListItems.length; i++)
    {
        menuListItems[i].className = menuListItems[i].className.removeClass("on");
    }

    /* IE selections */
    if (theWidgEditor.theIframe.contentWindow.document.selection)
    {
        theSelection = theWidgEditor.theIframe.contentWindow.document.selection;
        theRange = theSelection.createRange();
        try
        {
            theParentNode = theRange.parentElement();
        }
        catch (e)
        {
            return false;
        }
    }
    /* Mozilla selections */
    else
    {
        try
        {
            theSelection = theWidgEditor.theIframe.contentWindow.getSelection();
        }
        catch (e)
        {
            return false;
        }

        if (theSelection.rangeCount > 0)
        {
            theRange = theSelection.getRangeAt(0);
            theParentNode = theRange.commonAncestorContainer;
        }
        else
        {
            theRange = theWidgEditor.theIframe.contentWindow.document.createRange();
            theRange.setStart(theWidgEditor.theIframe.contentWindow.document.body, 1);
            theSelection.addRange(theRange);
            theParentNode = theWidgEditor.theIframe.contentWindow.document.body;
        }
    }

    while (theParentNode.nodeType == 3)
    {
        theParentNode = theParentNode.parentNode;
    }

    while (theParentNode.nodeName.toLowerCase() != "body")
    {
        switch (theParentNode.nodeName.toLowerCase())
        {
            case "a":
                theWidgEditor.theToolbar.setState("Link", "on");

                break;

            case "em":
                theWidgEditor.theToolbar.setState("Italic", "on");

                break;

            case "li":

                break;

            case "ol":
                theWidgEditor.theToolbar.setState("Ordered", "on");
                theWidgEditor.theToolbar.setState("Unordered", "off");

                break;

            case "span":
                if (theParentNode.getAttribute("style") == "font-weight: bold;")
                {
                    theWidgEditor.theToolbar.setState("Bold", "on");
                }
                else if (theParentNode.getAttribute("style") == "font-style: italic;")
                {
                    theWidgEditor.theToolbar.setState("Italic", "on");
                }
                else if (theParentNode.getAttribute("style") == "font-weight: bold; font-style: italic;")
                {
                    theWidgEditor.theToolbar.setState("Bold", "on");
                    theWidgEditor.theToolbar.setState("Italic", "on");
                }
                else if (theParentNode.getAttribute("style") == "font-style: italic; font-weight: bold;")
                {
                    theWidgEditor.theToolbar.setState("Bold", "on");
                    theWidgEditor.theToolbar.setState("Italic", "on");
                }

                break;

            case "strong":
                theWidgEditor.theToolbar.setState("Bold", "on");

                break;

            case "ul":
                theWidgEditor.theToolbar.setState("Unordered", "on");
                theWidgEditor.theToolbar.setState("Ordered", "off");

                break;

            default:
                theWidgEditor.theToolbar.setState("SelectBlock", "<" + theParentNode.nodeName.toLowerCase() + ">");

                break;
        }

        theParentNode = theParentNode.parentNode;
        theLevel++;
    }

    return true;
}




/* Turn off browser status display for toolbar items */
function widgToolbarMouseover()
{
    window.status = "";

    return true;
}




function acceptableChildren(theNode)
{
    var theChildren = theNode.childNodes;

    for (var i = 0; i < theChildren.length; i++)
    {
        if (!theChildren[i].nodeName.isAcceptedElementName())
        {
            if (!theChildren[i].nodeName.isInlineName())
            {
                if (theNode.nodeName.toLowerCase() == "p")
                {
                    acceptableChildren(replaceNodeWithChildren(theNode));

                    return true;
                }

                changeNodeType(theChildren[i], "p");
            }
            else
            {
                replaceNodeWithChildren(theChildren[i]);
            }

            i = -1;
        }
    }

    for (var i = 0; i < theChildren.length; i++)
    {
        acceptableChildren(theChildren[i]);
    }

    return true;
}




/* Change the type of a node, e.g. h3 to p */
function changeNodeType(theNode, nodeType)
{
    var theChildren = new Array();
    var theNewNode = document.createElement(nodeType);
    var theParent = theNode.parentNode;

    if (theParent != null)
    {
        for (var i = 0; i < theNode.childNodes.length; i++)
        {
            theChildren.push(theNode.childNodes[i].cloneNode(true));
        }

        for (var i = 0; i < theChildren.length; i++)
        {
            theNewNode.appendChild(theChildren[i]);
        }

        theParent.replaceChild(theNewNode, theNode);
    }

    return true;
}




/* Replace a node with its children -- delete the item and move its children up one level in the hierarchy */
function replaceNodeWithChildren(theNode)
{
    var theChildren = new Array();
    var theParent = theNode.parentNode;

    if (theParent != null)
    {
        for (var i = 0; i < theNode.childNodes.length; i++)
        {
            theChildren.push(theNode.childNodes[i].cloneNode(true));
        }

        for (var i = 0; i < theChildren.length; i++)
        {
            theParent.insertBefore(theChildren[i], theNode);
        }

        theParent.removeChild(theNode);

        return theParent;
    }

    return true;
}




/* Add a class to a string */
String.prototype.addClass = function(theClass)
{
    if (this != "")
    {
        if (!this.classExists(theClass))
        {
            return this + " " + theClass;
        }
    }
    else
    {
        return theClass;
    }

    return this;
}




/* Check if a class exists in a string */
String.prototype.classExists = function(theClass)
{
    var regString = "(^| )" + theClass + "\W*";
    var regExpression = new RegExp(regString);

    if (regExpression.test(this))
    {
        return true;
    }

    return false;
}




/* Check if a string is the nodeName of an accepted element */
String.prototype.isAcceptedElementName = function()
{
    var elementList = new Array("#text", "a", "em", "h1", "h2", "h3", "h4", "h5", "h6", "img", "li", "ol", "p", "strong", "ul");
    var theName = this.toLowerCase();

    for (var i = 0; i < elementList.length; i++)
    {
        if (theName == elementList[i])
        {
            return true;
        }
    }

    return false;
}




/* Check if a string is the nodeName of an inline element */
String.prototype.isInlineName = function()
{
    var inlineList = new Array("#text", "a", "em", "font", "strong", "span", "u");
    var theName = this.toLowerCase();

    for (var i = 0; i < inlineList.length; i++)
    {
        if (theName == inlineList[i])
        {
            return true;
        }
    }

    return false;
}




/* Remove a class from a string */
String.prototype.removeClass = function(theClass)
{
    var regString = "(^| )" + theClass + "\W*";
    var regExpression = new RegExp(regString);

    return this.replace(regExpression, "");
}




/* Reverse a string */
String.prototype.reverse = function()
{
    var theString = "";

    for (var i = this.length - 1; i >= 0; i--)
    {
        theString += this.charAt(i);
    }

    return theString;
}




/* Make tags valid by converting uppercase element and attribute names to lowercase and quoting attributes */
String.prototype.validTags = function()
{
    var theString = this;

    /* Replace uppercase element names with lowercase */
    theString = theString.replace(/<[^> ]*/g, function(match){return match.toLowerCase();});

    /* Replace uppercase attribute names with lowercase */
    theString = theString.replace(/<[^>]*>/g, function(match)
        {
            match = match.replace(/ [^=]+=/g, function(match2){return match2.toLowerCase();});

            return match;
        });

    /* Put quotes around unquoted attributes */
    theString = theString.replace(/<[^>]*>/g, function(match)
        {
            match = match.replace(/( [^=]+=)([^"][^ >]*)/g, "$1\"$2\"");

            return match;
        });

    return theString;
}