source: main/trunk/greenstone3/web/interfaces/default/js/document_scripts.js@ 26212

var _imageZoomEnabled = false;
var _linkCellMap = new Array();
var _onCells = new Array();

/********************
* EXPANSION SCRIPTS *
********************/

function getTextForSection(sectionID, callback)
{
    if(!callback)
    {
        console.log("Cannot get text as the callback function is not defined");
    }

    var template = "";
    template += '<xsl:template match="/">';
    template +=   '<text>';
    template +=     '<xsl:for-each select="/page/pageResponse/document//documentNode[@nodeID = \'' + sectionID + '\']">';
    template +=       '<xsl:call-template name="sectionContent"/>';
    template +=     '</xsl:for-each>';
    template +=   '</text>';
    template += '</xsl:template>';

    var hlCheckBox = document.getElementById("highlightOption");
    
    var hl = "";
    if(hlCheckBox)
    {
        if(hlCheckBox.checked)
        {
            hl = "on";
        }
        else
        {
            hl = "off";
        }
    }
    
    var ajax = gs.functions.ajaxRequest();
    ajax.open("GET", gs.xsltParams.library_name + "/collection/" + gs.cgiParams.c + "/document/" + sectionID + "?hl=" + hl + "&p.s=TextQuery&ilt=" + template.replace(" ", "%20"), true);
    ajax.onreadystatechange = function()
    {
        if(ajax.readyState == 4 && ajax.status == 200)
        {
            var response = ajax.responseText;
            
            if(response)
            {
                var textStart = response.indexOf(">", response.indexOf(">") + 1) + 1;
                var textEnd = response.lastIndexOf("<");
                
                if(textStart == 0 || textEnd == -1 || textEnd <= textStart)
                {
                    callback("");
                }
                
                var text = response.substring(textStart, textEnd);
                callback(text);
            }
            else
            {
                callback(null);
            }
        }
        else if(ajax.readyState == 4)
        {
            callback(null);
        }
    }
    ajax.send();
}

function getSubSectionsForSection(sectionID, callback)
{
    if(!callback)
    {
        console.log("Cannot get sub sections as the callback function is not defined");
    }

    var template = "";
    template += '<xsl:template match="/">';
    template +=   '<sections>';
    template +=     '<xsl:for-each select="/page/pageResponse/document//documentNode[@nodeID = \'' + sectionID + '\']/documentNode">';
    template +=       '<xsl:call-template name="wrapDocumentNodes"/>';
    template +=     '</xsl:for-each>';
    template +=   '</sections>';
    template += '</xsl:template>';

    var ajax = gs.functions.ajaxRequest();
    var url = gs.xsltParams.library_name + "/collection/" + gs.cgiParams.c + "/document/" + sectionID + "?ilt=" + template.replace(" ", "%20");

    if(gs.documentMetadata.docType == "paged")
    {
        url += "&dt=hierarchy";
    }
    ajax.open("GET", url, true);
    ajax.onreadystatechange = function()
    {
        if(ajax.readyState == 4 && ajax.status == 200)
        {
            var response = ajax.responseText;
            
            if(response)
            {
                var sectionsStart = response.indexOf(">", response.indexOf(">") + 1) + 1;
                var sectionsEnd = response.lastIndexOf("<");
                
                if(sectionsStart == 0 || sectionsEnd == -1 || sectionsEnd <= sectionsStart)
                {
                    callback(" ");
                    return;
                }
                
                var sections = response.substring(sectionsStart, sectionsEnd);
                callback(sections);
            }
            else
            {
                callback(null);
            }
        }
        else if(ajax.readyState == 4)
        {
            callback(null);
        }
    }
    ajax.send();
}

function toggleSection(sectionID, callback, tocDisabled)
{
    var docElem = document.getElementById("doc" + sectionID);
    var tocElem = document.getElementById("toc" + sectionID);
    
    var tocToggleElem = document.getElementById("ttoggle" + sectionID);
    var docToggleElem = document.getElementById("dtoggle" + sectionID);
    
    if(docElem.style.display == "none")
    {
        if(tocToggleElem && !tocDisabled)
        {
            tocToggleElem.setAttribute("src", gs.imageURLs.collapse);
        }
        
        if(tocElem && !tocDisabled)
        {
            tocElem.style.display = "block";
        }
        
        if(gs.functions.hasClass(docElem, "noText"))
        {
            getTextForSection(sectionID, function(text)
            {
                if(text)
                {   
                    var nodeID = sectionID.replace(/\./g, "_");
                    if(text.search("wrap" + nodeID) != -1)
                    {
                        document.getElementById("zoomOptions").style.display = null;
                        document.getElementById("pagedImageOptions").style.display = null;
                    }
                    getSubSectionsForSection(sectionID, function(sections)
                    {                   
                        if(sections)
                        {
                            var textElem = document.getElementById("doc" + sectionID);
                            $(textElem).html(text + sections);
                            
                            docElem.setAttribute("class", docElem.getAttribute("class").replace(/\bnoText\b/g, ""));
                            docElem.style.display = "block";
                            docToggleElem.setAttribute("src", gs.imageURLs.collapse);
                            
                            if(callback)
                            {
                                callback(true);
                            }
                            
                            if(document.getElementById("viewSelection"))
                            {
                                changeView();
                            }
                        }
                        else
                        {
                            docToggleElem.setAttribute("src", gs.imageURLs.expand);
                            if(callback)
                            {
                                callback(false);
                            }
                        }
                    });
                }
                else
                {
                    docToggleElem.setAttribute("src", gs.imageURLs.expand);
                    if(callback)
                    {
                        callback(false);
                    }
                }
            });
        
            docToggleElem.setAttribute("src", gs.imageURLs.loading);
        }
        else
        {
            docToggleElem.setAttribute("src", gs.imageURLs.collapse);
            docElem.style.display = "block";
            
            if(callback)
            {
                callback(true);
            }
        }
    }
    else
    {
        docElem.style.display = "none";
        
        //Use the page image if this is a leaf node and the chapter image if it not
        docToggleElem.setAttribute("src", gs.imageURLs.expand);
        
        if(tocToggleElem)
        {
            tocToggleElem.setAttribute("src", gs.imageURLs.expand);
        }
        
        if(tocElem)
        {
            tocElem.style.display = "none";
        }
        
        if(callback)
        {
            callback(true);
        }
    }
}

function scrollToTop()
{
    $('html, body').stop().animate({scrollTop: 0}, 1000);
}

function focusSection(sectionID, level, tocDisabled)
{
    if(!level)
    {
        level = 0;
    }

    var parts = sectionID.split(".");
    if(level >= parts.length)
    {
        var topVal = $(document.getElementById("doc" + sectionID)).offset().top - 50;
        $('html, body').stop().animate({scrollTop: topVal}, 1000);
        return;
    }
    
    var idToExpand = "";
    for(var i = 0; i < level + 1; i++)
    {
        if(i > 0)
        {
            idToExpand += ".";
        }
    
        idToExpand += parts[i];
    }
    
    if(!isExpanded(idToExpand))
    {
        toggleSection(idToExpand, function(success)
        {
            if(success)
            {
                focusSection(sectionID, level + 1, tocDisabled);
            }
        }, tocDisabled);
    }
    else
    {
        focusSection(sectionID, level + 1, tocDisabled);
    }
}

function expandOrCollapseAll(expand)
{
    var divs = document.getElementsByTagName("DIV");
    var startCounter = 0;
    var endCounter = 0;
    
    for(var i = 0; i < divs.length; i++)
    {
        if(divs[i].getAttribute("id") && divs[i].getAttribute("id").search(/^doc/) != -1)
        {
            var id = divs[i].getAttribute("id").replace(/^doc(.*)/, "$1");
            if(isExpanded(id) != expand)
            {
                //Don't collapse the top level
                if(!expand && id.indexOf(".") == -1)
                {
                    continue;
                }
                startCounter++;

                var toggleFunction = function(tid)
                {
                    toggleSection(tid, function(success)
                    {
                        if(success)
                        {
                            endCounter++;
                        }
                        else
                        {
                            setTimeout(function(){toggleFunction(tid)}, 500);
                        }
                    });
                }
                toggleFunction(id);
            }
        }
    }
    
    if(startCounter != 0)
    {
        var checkFunction = function()
        {
            if(startCounter == endCounter)
            {
                expandOrCollapseAll(expand);
            }
            else
            {
                setTimeout(checkFunction, 500);
            }
        }
        checkFunction();
    }
}

function loadTopLevelPage(callbackFunction, customURL)
{
    var ajax = gs.functions.ajaxRequest();

    var url = gs.xsltParams.library_name + "?a=d&c=" + gs.cgiParams.c + "&excerptid=gs-document";
    if(gs.cgiParams.d && gs.cgiParams.d.length > 0)
    {
        url += "&d=" + gs.cgiParams.d.replace(/([^.]*)\..*/, "$1");
    }
    else if(gs.cgiParams.href && gs.cgiParams.href.length > 0)
    {
        url += "&d=&alb=1&rl=1&href=" + gs.cgiParams.href;
    }

    if(customURL != null)
    {
        ajax.open("GET", customURL, true);
    }
    else
    {
        ajax.open("GET", url, true);
    }

    ajax.onreadystatechange = function()
    {
        if(ajax.readyState == 4 && ajax.status == 200)
        {
            var response = ajax.responseText;
            
            if(response)
            {
                var targetElem = document.getElementById("gs-document");
                var docStart = response.indexOf(">") + 1;
                var docEnd = response.lastIndexOf("<");
                var doc = response.substring(docStart, docEnd);

                targetElem.innerHTML = doc;
                
                if(callbackFunction)
                {
                    callbackFunction();
                }
            }
        }
        else if(ajax.readyState == 4)
        {
            setTimeout(function(){loadTopLevelPage(callbackFunction, customURL);}, 1000);
        }
    };
    ajax.send();
}

function retrieveFullTableOfContents()
{
    var ajax = gs.functions.ajaxRequest();
    
    var url = gs.xsltParams.library_name + "/collection/" + gs.cgiParams.c + "?excerptid=tableOfContents&ed=1";
    if(gs.cgiParams.d && gs.cgiParams.d.length > 0)
    {
        url += "&a=d&d=" + gs.cgiParams.d;
    }
    else if(gs.cgiParams.href && gs.cgiParams.href.length > 0)
    {
        url += "&a=d&d=&alb=1&rl=1&href=" + gs.cgiParams.href;
    }
    
    ajax.open("GET", url, true);
    ajax.onreadystatechange = function()
    {
        if(ajax.readyState == 4 && ajax.status == 200)
        {
            var newTOCElem = ajax.responseText;
            var tocStart = newTOCElem.indexOf(">") + 1;
            var tocEnd = newTOCElem.lastIndexOf("<");
            
            var newTOC = newTOCElem.substring(tocStart, tocEnd);
            
            //Add the "Expand document"/"Collapse document" links
            newTOC = "<table style=\"width:100%; text-align:center;\"><tr><td><a href=\"javascript:expandOrCollapseAll(true);\">Expand document</a></td><td><a href=\"javascript:expandOrCollapseAll(false);\">Collapse document</a></td></tr></table>" + newTOC;
            
            //Collapse the TOC
            newTOC = newTOC.replace(/display:block/g, "display:none");
            newTOC = newTOC.replace(/display:none/, "display:block");
            newTOC = newTOC.replace(/images\/collapse/g, "images/expand");
            
            var tocElem = document.getElementById("tableOfContents");
            tocElem.innerHTML = newTOC;
            
            gs.variables.tocLoaded = true;
        }
        else if(ajax.readyState == 4)
        {
            setTimeout(retrieveFullTableOfContents, 1000);
        }
    }
    ajax.send();
}

function isExpanded(sectionID)
{
    var docElem = document.getElementById("doc" + sectionID);
    if(docElem.style.display == "block")
    {
        return true;
    }
    return false;
}

function isParentOf(parent, child)
{
    if(child.indexOf(parent) != -1 && child.length > parent.length && child[parent.length] == '.')
    {
        return true;
    }
    return false;
}

function minimizeSidebar()
{
    var toc = document.getElementById("contentsArea");
    var maxLink = document.getElementById("sidebarMaximizeButton");
    var minLink = document.getElementById("sidebarMinimizeButton");
    
    if(toc)
    {
        toc.style.display = "none";
    }
    
    maxLink.style.display = "block";
    minLink.style.display = "none";
}

function maximizeSidebar()
{
    var coverImage = document.getElementById("coverImage");
    var toc = document.getElementById("contentsArea");
    var maxLink = document.getElementById("sidebarMaximizeButton");
    var minLink = document.getElementById("sidebarMinimizeButton");
    
    if(coverImage)
    {
        coverImage.style.display = "block";
    }
    
    if(toc)
    {
        toc.style.display = "block";
    }
    
    maxLink.style.display = "none";
    minLink.style.display = "block";
}

/**********************
* PAGED-IMAGE SCRIPTS *
**********************/

function changeView()
{
    var viewList = document.getElementById("viewSelection");
    var currentVal = viewList.value;
    
    var view;
    if(currentVal == "Image view")
    {
        setImageVisible(true);
        setTextVisible(false);
        view = "image";
    }
    else if(currentVal == "Text view")
    {
        setImageVisible(false);
        setTextVisible(true);
        view = "text";
    }
    else
    {
        setImageVisible(true);
        setTextVisible(true);
        view = "";
    }
    
    var ajax = gs.functions.ajaxRequest();
    ajax.open("GET", gs.xsltParams.library_name + "?a=d&view=" + view + "&c=" + gs.cgiParams.c);
    ajax.send();
}

function setImageVisible(visible)
{
    var divs = document.getElementsByTagName("DIV");
    var images = new Array();
    for (var i = 0; i < divs.length; i++)
    {
        if(divs[i].id && divs[i].id.search(/^image/) != -1)
        {
            images.push(divs[i]);
        }
    }
    
    for(var i = 0; i < images.length; i++)
    {
        var image = images[i];
        if(visible)
        {
            image.style.display = "block";
        }
        else
        {
            image.style.display = "none";
        }
    }
}

function setTextVisible(visible)
{
    var divs = document.getElementsByTagName("DIV");
    var textDivs = new Array();
    for (var i = 0; i < divs.length; i++)
    {
        if(divs[i].id && divs[i].id.search(/^text/) != -1)
        {
            textDivs.push(divs[i]);
        }
    }

    for(var i = 0; i < textDivs.length; i++)
    {
        var text = textDivs[i];
        if(visible)
        {
            text.style.display = "block";
        }
        else
        {
            text.style.display = "none";
        }
    }
}

function retrieveTableOfContentsAndTitles()
{
    var ilt = "";
    ilt += '<xsl:template match="/">';
    ilt +=   '<xsl:for-each select="/page/pageResponse/document/documentNode">';
    ilt +=     '<xsl:call-template name="documentNodeTOC"/>';
    ilt +=   '</xsl:for-each>';
    ilt += '</xsl:template>';

    var ajax = gs.functions.ajaxRequest();
    ajax.open("GET", gs.xsltParams.library_name + "?a=d&ed=1&c=" + gs.cgiParams.c + "&d=" + gs.cgiParams.d + "&ilt=" + ilt.replace(/ /g, "%20"), true);
    ajax.onreadystatechange = function()
    {
        if(ajax.readyState == 4 && ajax.status == 200)
        {
            document.getElementById("tableOfContents").innerHTML = ajax.responseText;
            replaceLinksWithSlider();
            var loading = document.getElementById("tocLoadingImage");
            loading.parentNode.removeChild(loading);
        }
        else if(ajax.readyState == 4)
        {
            setTimeout(function(){retrieveTableOfContentsAndTitles();}, 1000);
        }
    }
    ajax.send();
}

function replaceLinksWithSlider()
{
    var tableOfContents = document.getElementById("tableOfContents");
    var liElems = tableOfContents.getElementsByTagName("LI");
    
    var leafSections = new Array();
    for (var i = 0; i < liElems.length; i++)
    {
        var section = liElems[i];
        var add = true;
        for(var j = 0; j < leafSections.length; j++)
        {
            if(leafSections[j] == undefined){continue;}
            
            var leaf = leafSections[j];
            if(leaf.getAttribute("id").search(section.getAttribute("id")) != -1)
            {
                add = false;
            }
            
            if(section.getAttribute("id").search(leaf.getAttribute("id")) != -1)
            {
                delete leafSections[j];
            }
        }
        
        if(add)
        {
            leafSections.push(section);
        }
    }
    
    for(var i = 0 ; i < leafSections.length; i++)
    {
        if(leafSections[i] == undefined){continue;}
        leafSections[i].style.display = "none";
        var links = leafSections[i].getElementsByTagName("A");
        var widget = new SliderWidget(links);
        leafSections[i].parentNode.insertBefore(widget.getElem(), leafSections[i]);
    }
    
    //Disable all TOC toggles
    var imgs = document.getElementsByTagName("IMG");
    for(var j = 0; j < imgs.length; j++)
    {
        var currentImage = imgs[j];
        if(currentImage.getAttribute("id") && currentImage.getAttribute("id").search(/^ttoggle/) != -1)
        {
            currentImage.setAttribute("onclick", "");
        }
        else if(currentImage.getAttribute("id") && currentImage.getAttribute("id").search(/^dtoggle/) != -1)
        {
            currentImage.setAttribute("onclick", currentImage.getAttribute("onclick").replace(/\)/, ", null, true)"));
        }
    }
}

function SliderWidget(_links)
{
    //****************
    //MEMBER VARIABLES
    //****************

    //The container for the widget
    var _mainDiv = document.createElement("DIV");
    _mainDiv.setAttribute("class", "ui-widget-content pageSlider");
    
    //The table of images
    var _linkTable = document.createElement("TABLE");
    _mainDiv.appendChild(_linkTable);
    
    //The image row of the table
    var _linkRow = document.createElement("TR");
    _linkTable.appendChild(_linkRow);
    
    //The list of titles we can search through
    var _titles = new Array();

    //****************
    //PUBLIC FUNCTIONS
    //****************
    
    //Function that returns the widget element
    this.getElem = function()
    {
        return _mainDiv;
    }
    
    //*****************
    //PRIVATE FUNCTIONS
    //*****************
    
    var setUpFilterBox = function()
    {
        var filter = $("#filterText");
        filter.keyup(function()
        {
            var currentValue = filter.val();
            var isRange = (currentValue.search(/\d+-\d+/) != -1)
            
            var found = false;
            for(var i = 0; i < _titles.length; i++)
            {
                if(_titles[i][0] == currentValue)
                {
                    found = true;
                }
            }
            
            if(!found && isRange)
            {
                var firstNumber = currentValue.replace(/^(\d+)-\d+$/, "$1");
                var secondNumber = currentValue.replace(/^\d+-(\d+)$/, "$1");
                
                if(firstNumber <= secondNumber)
                {
                    var matchingTitles = new Array();
                    for(var i = firstNumber; i <= secondNumber; i++)
                    {
                        var numString = i + "";
                        for(var j = 0; j < _titles.length; j++)
                        {
                            var currentTitle = _titles[j];
                            if(currentTitle[0].search(numString) != -1)
                            {
                                matchingTitles.push(currentTitle);
                            }
                        }
                    }
                    
                    for(var i = 0; i < _titles.length; i++)
                    {
                        _titles[i][1].cell.style.display = "none";
                    }
                    
                    for(var i = 0; i < matchingTitles.length; i++)
                    {
                        matchingTitles[i][1].cell.style.display = "table-cell";
                    }
                }
            }
            else
            {
                for(var i = 0; i < _titles.length; i++)
                {
                    var currentTitle = _titles[i];
                    if(currentTitle[0].search(currentValue.replace(/\./g, "\\.")) != -1)
                    {
                        currentTitle[1].cell.style.display = "table-cell";
                    }
                    else
                    {
                        currentTitle[1].cell.style.display = "none";
                    }
                }
            }
        });
    }
    
    var getImage = function(page, attemptNumber)
    {
        var ajax = gs.functions.ajaxRequest();

        var href = page.getAttribute("href");
        var startHREF = href.indexOf("'") + 1;
        var endHREF = href.indexOf("'", startHREF);
        var nodeID = href.substring(startHREF, endHREF);
        href = gs.xsltParams.library_name + "/collection/" + gs.cgiParams.c + "/document/" + nodeID;
        
        var template = '';
        template += '<xsl:template match="/">';
        template +=   '<gsf:metadata name=\"Thumb\"/>';
        template +=   '<html>';
        template +=     '<img>';
        template +=       '<xsl:attribute name="src">';
        template +=         "<xsl:value-of disable-output-escaping=\"yes\" select=\"/page/pageResponse/collection/metadataList/metadata[@name = 'httpPath']\"/>";
        template +=         '<xsl:text>/index/assoc/</xsl:text>';
        template +=         "<xsl:value-of disable-output-escaping=\"yes\" select=\"/page/pageResponse/document/metadataList/metadata[@name = 'assocfilepath']\"/>";
        template +=         '<xsl:text>/</xsl:text>';
        template +=         "<xsl:value-of disable-output-escaping=\"yes\" select=\"/page/pageResponse/document//documentNode[@nodeID = '" + nodeID + "']/metadataList/metadata[@name = 'Thumb']\"/>";
        template +=       '</xsl:attribute>';
        template +=     '</img>';
        template +=     '<p>';
        template +=       "<xsl:value-of disable-output-escaping=\"yes\" select=\"/page/pageResponse/document/documentNode/metadataList/metadata[@name = 'Title']\"/>";
        template +=     '</p>';
        template +=   '</html>';
        template += '</xsl:template>';

        ajax.open("GET", href + "?ilt=" + template.replace(" ", "%20"));
        ajax.onreadystatechange = function()
        {
            if(ajax.readyState == 4 && ajax.status == 200)
            {
                var text = ajax.responseText;
                var hrefStart = text.indexOf("src=\"") + 5;
                if(hrefStart == -1)
                {
                    page.isLoading = false;
                    page.noImage = true;
                    page.image.setAttribute("src", gs.imageURLs.blank);
                    return;
                }
                var hrefEnd = text.indexOf("\"", hrefStart);
                var href = text.substring(hrefStart, hrefEnd);

                var image = document.createElement("IMG");
                $(image).load(function()
                {
                    page.link.innerHTML = "";
                    page.link.appendChild(image);
                    page.isLoading = false;
                    page.imageLoaded = true;
                });
                $(image).error(function()
                {
                    if(!attemptNumber || attemptNumber < 3)
                    {
                        setTimeout(function(){getImage(page, ((!attemptNumber) ? 1 : attemptNumber + 1));}, 500);
                    }
                    else
                    {
                        page.isLoading = false;
                        page.noImage = true;
                        image.setAttribute("src", gs.imageURLs.blank);
                    }
                });
                image.setAttribute("src", href);
                
                var titleStart = text.indexOf("<p>") + 3;
                var titleEnd = text.indexOf("</p>");
                var title = text.substring(titleStart, titleEnd);
            }
            else if (ajax.readyState == 4)
            {
                page.failed = true;
                if(!attemptNumber || attemptNumber < 3)
                {
                    setTimeout(function(){getImage(page, ((!attemptNumber) ? 1 : attemptNumber + 1));}, 500);
                }
                else
                {
                    var image = document.createElement("IMG");
                    image.setAttribute("src", gs.imageURLs.blank);
                    page.link.innerHTML = "";
                    page.link.appendChild(image);
                    page.isLoading = false;
                    page.noImage = true;
                }
            }
        }
        ajax.send();
    }
    
    var startCheckFunction = function()
    {
        var checkFunction = function()
        {
            var widgetLeft = _mainDiv.scrollLeft;
            var widgetRight = _mainDiv.clientWidth + _mainDiv.scrollLeft;

            var visiblePages = new Array();
            for(var i = 0; i < _links.length; i++)
            {
                var current = _links[i].cell;
                var currentLeft = current.offsetLeft;
                var currentRight = currentLeft + current.clientWidth;
                if(currentRight > widgetLeft && currentLeft < widgetRight)
                {
                    visiblePages.push(_links[i]);
                }
            }

            for(var i = 0; i < visiblePages.length; i++)
            {
                var page = visiblePages[i];
                if(!page || page.imageLoaded || page.noImage || page.isLoading)
                {
                    continue;
                }
                
                page.isLoading = true;
                getImage(page);
            }
        }
        setInterval(checkFunction, 1000);
    }
    
    //***********
    //CONSTRUCTOR
    //***********
    
    for(var i = 0; i < _links.length; i++)
    {
        var col = document.createElement("TD");
        _linkRow.appendChild(col);
        col.setAttribute("class", "pageSliderCol");
        _links[i].cell = col;
        
        var link = document.createElement("A");
        col.appendChild(link);
        _links[i].link = link;
        var href = _links[i].getAttribute("href");
        link.setAttribute("href", href.replace(/\)/, ", 0, true)"));
        
        if(!_linkCellMap[href])
        {
            _linkCellMap[href] = new Array();
        }
        _linkCellMap[href].push(_links[i]);
        
        var image = document.createElement("IMG");
        link.appendChild(image);
        image.setAttribute("src", gs.imageURLs.loading);
        _links[i].image = image;
        
        var title = _links[i].innerHTML;
        if(title.search(/^[^ ]+ [^ ]+$/) != -1)
        {
            var section = title.replace(/^([^ ]+) [^ ]+$/, "$1");
            var page = title.replace(/^[^ ]+ ([^ ]+)$/, "$1");
            if(page.search(/^[0-9]+$/) != -1)
            {
                title = page;
            }
        }
        _titles.push([title, _links[i]]);
        
        var text = document.createTextNode(title);
        col.appendChild(text);
    }
    
    setUpFilterBox();
    startCheckFunction();
}

/***********************
* HIGHLIGHTING SCRIPTS *
***********************/
function swapHighlight()
{
    var hlCheckbox = document.getElementById("highlightOption");
    
    var from;
    var to;
    if(hlCheckbox.checked)
    {
        from = "noTermHighlight";
        to = "termHighlight";
    }
    else
    {
        from = "termHighlight";
        to = "noTermHighlight";
    }
    
    var spans = document.getElementsByTagName("span");
    for(var i = 0; i < spans.length; i++)
    {
        var currentSpan = spans[i];
        if(currentSpan.getAttribute("class") == from)
        {
            currentSpan.setAttribute("class", to);
        }
    }
}

/**************************
* REALISTIC BOOKS SCRIPTS *
**************************/

function bookInit()
{
    loadBook(); 
    hideText(); 
    showBook(); 
    swapLinkJavascript(false);
}

function hideText()
{
    var textDiv = document.getElementById("gs-document-text");
    textDiv.style.visibility = "hidden";
}

function showText()
{
    var textDiv = document.getElementById("gs-document-text");
    textDiv.style.visibility = "visible";
}

function hideBook()
{
    var bookDiv = document.getElementById("bookdiv");
    bookDiv.style.visibility = "hidden";
    bookDiv.style.height = "0px";
    
    var bookObject = document.getElementById("bookObject");
    bookObject.style.visibility = "hidden";
    bookObject.style.height = "0px";
    
    var bookEmbed = document.getElementById("bookEmbed");
    bookEmbed.style.visibility = "hidden";
    bookEmbed.style.height = "0px";
}

function showBook()
{
    var bookDiv = document.getElementById("bookdiv");
    bookDiv.style.visibility = "visible";
    bookDiv.style.height = "600px";
    
    var bookObject = document.getElementById("bookObject");
    bookObject.style.visibility = "visible";
    bookObject.style.height = "600px";
    
    var bookEmbed = document.getElementById("bookEmbed");
    bookEmbed.style.visibility = "visible";
    bookEmbed.style.height = "600px";
}

function swapLinkJavascript(rbOn)
{
    var option = document.getElementById("rbOption");
    if(rbOn)
    {
        option.setAttribute("onclick", "hideText(); showBook(); swapLinkJavascript(false);");
    }
    else
    {
        option.setAttribute("onclick", "hideBook(); showText(); swapLinkJavascript(true);");
    }
}

//Helper function to create param elements
function createParam(name, value)
{
    var param = document.createElement("PARAM");
    param.setAttribute("name", name);
    param.setAttribute("value", value);
    return param;
}

function loadBook()
{
    var doc_url = document.URL; 
    doc_url = doc_url.replace(/(&|\?)book=[a-z]+/gi,'');
    doc_url += '&book=flashxml';
    
    var img_cover = gs.collectionMetadata.httpPath + '/index/assoc/' + gs.documentMetadata.assocfilepath + '/cover.jpg';

    var flash_plug_html = ""
    flash_plug_html += '<OBJECT align="middle" classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" \n';
    flash_plug_html += '  height="600px" id="bookObject" swLiveConnect="true" \n';
    flash_plug_html += '  codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" \n';
    flash_plug_html += '  width="70%">\n';
    flash_plug_html += '    <PARAM name="allowScriptAccess" value="always" />\n';
    flash_plug_html += '    <PARAM name="movie" value="Book.swf';
    flash_plug_html += '?src_image=' + escape(img_cover);
    flash_plug_html += '&doc_url=' + escape(doc_url);
    flash_plug_html += '" />\n';
    flash_plug_html += '    <PARAM name="quality" value="high" />\n';
    flash_plug_html += '    <PARAM name="bgcolor" value="#FFFFFF" />\n';
    flash_plug_html += '    <EMBED align="middle" \n';
    flash_plug_html += '      allowScriptAccess="always" swLiveConnect="true" \n';
    flash_plug_html += '      bgcolor="#FFFFFF" height="600px" name="Book" \n';
    flash_plug_html += '      pluginspage="http://www.macromedia.com/go/getflashplayer" \n';
    flash_plug_html += '      quality="high" id="bookEmbed"\n';
    flash_plug_html += '      src="Book.swf';
    flash_plug_html += '?src_image=' + escape(img_cover);
    flash_plug_html += '&doc_url=' + escape(doc_url);
    flash_plug_html += '"\n'; 
    flash_plug_html += '      type="application/x-shockwave-flash" width="70%" />\n';
    flash_plug_html += '</OBJECT>\n';
    var flash_div = document.getElementById("bookdiv");
    flash_div.innerHTML = flash_plug_html;
}

function addEditMetadataLink(cell)
{
    var id = cell.getAttribute("id").substring(6);
    var metaTable = document.getElementById("meta" + id);

    var row = cell.parentNode;
    var newCell = document.createElement("TD");
    newCell.setAttribute("style", "font-size:0.7em; padding:0px 10px");
    newCell.setAttribute("class", "editMetadataButton");
    
    var linkSpan = document.createElement("SPAN");
    linkSpan.setAttribute("class", "ui-state-default ui-corner-all");
    linkSpan.setAttribute("style", "padding: 2px; float:left;");
    
    var linkLabel = document.createElement("SPAN");
    linkLabel.innerHTML = "edit metadata";
    newCell.linkLabel = linkLabel;
    var linkIcon = document.createElement("SPAN");
    linkIcon.setAttribute("class", "ui-icon ui-icon-folder-collapsed");
    newCell.linkIcon = linkIcon;
    
    var uList = document.createElement("UL");
    var labelItem = document.createElement("LI");
    var iconItem = document.createElement("LI");
    uList.appendChild(iconItem);
    uList.appendChild(labelItem);
    labelItem.appendChild(linkLabel);
    iconItem.appendChild(linkIcon);
    
    uList.setAttribute("style", "outline: 0 none; margin:0px; padding:0px;");
    labelItem.setAttribute("style", "float:left; list-style:none outside none;");
    iconItem.setAttribute("style", "float:left; list-style:none outside none;");
    
    var newLink = document.createElement("A");
    newLink.setAttribute("href", "javascript:;");
    newLink.onclick = function()
    {
        if(metaTable.style.display == "none")
        {
            linkLabel.innerHTML = "hide metadata";
            linkIcon.setAttribute("class", "ui-icon ui-icon-folder-open");
            metaTable.style.display = "block";
            metaTable.metaNameField.style.display = "inline";
            metaTable.addRowButton.style.display = "inline";
        }
        else
        {
            linkLabel.innerHTML = "edit metadata";
            linkIcon.setAttribute("class", "ui-icon ui-icon-folder-collapsed");
            metaTable.style.display = "none";
            metaTable.metaNameField.style.display = "none";
            metaTable.addRowButton.style.display = "none";
        }
    }
    newLink.appendChild(uList);
    linkSpan.appendChild(newLink);
    newCell.appendChild(linkSpan);
    row.appendChild(newCell);
    
    addFunctionalityToTable(metaTable);
    metaTable.metaNameField.style.display = "none";
    metaTable.addRowButton.style.display = "none";
}

function setEditingFeaturesVisible(visible)
{
    if(visible)
    {
        document.getElementById("editContentButton").innerHTML = "Hide editor";
    }
    else
    {
        document.getElementById("editContentButton").innerHTML = "Edit content";
    }

    var saveButton = document.getElementById("saveButton");
    var metadataListLabel = document.getElementById("metadataListLabel");
    var metadataList = document.getElementById("metadataSetList");
    
    var visibility = (visible ? "" : "none");
    saveButton.style.display = visibility;
    metadataListLabel.style.display = visibility;
    metadataList.style.display = visibility;
    
    var buttons = gs.functions.getElementsByClassName("editMetadataButton");
    
    for(var i = 0; i < buttons.length; i++)
    {
        buttons[i].style.display = visibility;
        buttons[i].linkLabel.innerHTML = "edit metadata";
        buttons[i].linkIcon.setAttribute("class", "ui-icon ui-icon-folder-collapsed");
    }
    
    var tables = document.getElementsByTagName("TABLE");
    for(var i = 0; i < tables.length; i++)
    {
        var currentTable = tables[i];
        if(currentTable.getAttribute("id") && currentTable.getAttribute("id").search(/^meta/) != -1)
        {
            currentTable.style.display = "none";
            currentTable.metaNameField.style.display = "none";
            currentTable.addRowButton.style.display = "none";
        }
    }
}

function readyPageForEditing()
{
    if(document.getElementById("metadataSetList"))
    {
        var setList = document.getElementById("metadataSetList");
        if(!setList.style.display || setList.style.display == "")
        {
            setEditingFeaturesVisible(false);
        }
        else
        {
            setEditingFeaturesVisible(true);
        }
        return;
    }

    document.getElementById("editContentButton").innerHTML = "Hide Editor";
    
    var textDivs = gs.functions.getElementsByClassName("sectionText");
    for(var i = 0; i < textDivs.length; i++)
    {
        de.doc.registerEditSection(textDivs[i]);
    }
    
    var editBar = document.getElementById("editBarLeft");
    var saveButton = document.createElement("BUTTON");
    saveButton.onclick = save;
    saveButton.innerHTML = "Save changes";
    saveButton.setAttribute("id", "saveButton");
    editBar.appendChild(saveButton);
    
    var visibleMetadataList = document.createElement("SELECT");
    var allOption = document.createElement("OPTION");
    allOption.innerHTML = "All";
    visibleMetadataList.appendChild(allOption);
    visibleMetadataList.setAttribute("id", "metadataSetList");
    var metadataListLabel = document.createElement("SPAN");
    metadataListLabel.setAttribute("id", "metadataListLabel");
    metadataListLabel.setAttribute("style", "margin-left:20px;");
    metadataListLabel.innerHTML = "Visible metadata: ";
    editBar.appendChild(metadataListLabel);
    editBar.appendChild(visibleMetadataList);
    visibleMetadataList.onchange = onVisibleMetadataSetChange;
    
    var statusBarDiv = document.createElement("DIV");
    editBar.appendChild(statusBarDiv);
    _statusBar = new StatusBar(statusBarDiv);
    
    var titleDivs = gs.functions.getElementsByClassName("sectionTitle");
    for(var i = 0; i < titleDivs.length; i++)
    {
        addEditMetadataLink(titleDivs[i]);
    }
    
    _baseURL = gs.xsltParams.library_name;
}

function showSlideShow()
{
    var visible = $("#ssOption").attr('checked');
    if(visible)
    {
        $("#gs-document").hide();
        if(!($("#gs-slideshow").length))
        {
            var slideshowDiv = $("<div>", {id:"gs-slideshow"});
            var loadingImage = $("<img>", {src:gs.imageURLs.loading});
            slideshowDiv.append(loadingImage);
            
            $("#gs-document").after(slideshowDiv);
            
            retrieveImagesForSlideShow(function(imageIDArray)
            {
                loadingImage.hide();
                if(imageIDArray && imageIDArray.length > 0)
                {
                    var imageURLs = new Array();
                    for(var i = 0; i < imageIDArray.length; i++)
                    {
                        if(imageIDArray[i].source && imageIDArray[i].source.search(/.*\.(gif|jpg|jpeg|png)$/) != -1)
                        {
                            imageURLs.push(gs.collectionMetadata.httpPath + "/index/assoc/" + gs.documentMetadata.assocfilepath + "/" + imageIDArray[i].source);
                        }
                    }
                    new SlideShowWidget(slideshowDiv, imageURLs, imageIDArray);
                }
            });
        }
        else
        {
            $("#gs-slideshow").show();
        }
    }
    else
    {
        if($("#gs-slideshow").length)
        {
            $("#gs-slideshow").hide();
        }
        $("#gs-document").show();
    }
}

function retrieveImagesForSlideShow(callback)
{
    var template = "";
    template += '<xsl:template match="/">';
    template +=   '<images>[';
    template +=     '<xsl:for-each select="//documentNode">';
    template +=       '<xsl:text disable-output-escaping="yes">{"source":"</xsl:text><gsf:metadata name="Source"/><xsl:text disable-output-escaping="yes">",</xsl:text>';
    template +=       '<xsl:text disable-output-escaping="yes">"id":"</xsl:text><xsl:value-of select="@nodeID"/><xsl:text disable-output-escaping="yes">"}</xsl:text>';
    template +=       '<xsl:if test="position() != count(//documentNode)">,</xsl:if>';
    template +=     '</xsl:for-each>';
    template +=   ']</images>';
    template += '</xsl:template>';

    var url = gs.xsltParams.library_name + "/collection/" + gs.cgiParams.c + "/document/" + gs.cgiParams.d + "?ed=1&ilt=" + template.replace(" ", "%20");

    $.ajax(
    {
        url:url,
        success: function(data)
        {
            var startIndex = data.indexOf(">", data.indexOf(">") + 1) + 1;
            var endIndex = data.lastIndexOf("<");
            var arrayString = data.substring(startIndex, endIndex);
            var imageIDArray = eval(arrayString);

            callback(imageIDArray);
        }
    });
}

function SlideShowWidget(mainDiv, images, idArray)
{
    var _inTransition = false;
    var _images = new Array();
    var _mainDiv = mainDiv;
    var _imageDiv = $("<div>", {id:"ssImageDiv"});
    var _navDiv = $("<div>", {style:"height:2em;"});
    var _nextButton = $("<img>", {src:gs.imageURLs.next, style:"float:right; cursor:pointer;"});
    var _prevButton = $("<img>", {src:gs.imageURLs.prev, style:"float:left; cursor:pointer;"});
    var _clearDiv = $("<div>", {style:"clear:both;"});
    var _currentIndex = 0;
    
    _navDiv.append(_nextButton);
    _navDiv.append(_prevButton);
    _navDiv.append(_clearDiv);
    _mainDiv.append(_navDiv);
    _mainDiv.append(_imageDiv);
    
    for(var i = 0; i < images.length; i++)
    {
        _images.push($("<img>", {src:images[i], "class":"slideshowImage"}));
    }
    
    _imageDiv.append(_images[0]);
    
    this.nextImage = function()
    {
        if(!_inTransition)
        {
            _inTransition = true;
            if((_currentIndex + 1) < _images.length)
            {
                _imageDiv.fadeOut(1000, function()
                {
                    _imageDiv.empty();
                    _imageDiv.append(_images[_currentIndex + 1]);
                    _currentIndex++;
                    _imageDiv.fadeIn(1000, function()
                    {
                        _inTransition = false;
                    });
                });
            }
            else
            {
                _inTransition = false;
            }
        }
    }
    
    this.prevImage = function()
    {
        if(!_inTransition)
        {
            _inTransition = true;
            if((_currentIndex - 1) >= 0)
            {
                _imageDiv.fadeOut(1000, function()
                {
                    _imageDiv.empty();
                    _imageDiv.append(_images[_currentIndex - 1]);
                    _currentIndex--;
                    _imageDiv.fadeIn(1000, function()
                    {
                        _inTransition = false;
                    });
                });
            }
            else
            {
                _inTransition = false;
            }
        }
    }
    
    var getRootFilenameFromURL = function(url)
    {
        var urlSegments = url.split("/");
        var filename = urlSegments[urlSegments.length - 1];
        return filename.replace(/_thumb\..*$/, "");
    }
    
    var setLink = function(currentLink, index)
    {
        $(currentLink).click(function()
        {
            _inTransition = true;
            _currentIndex = index;
            _imageDiv.fadeOut(1000, function()
            {
                _imageDiv.empty();
                _imageDiv.append(_images[_currentIndex]);
                _imageDiv.fadeIn(1000, function()
                {
                    _inTransition = false;
                });
            });
        });
    }

    var sliderLinks = $(".pageSliderCol a");
    for(var i = 0; i < sliderLinks.length; i++)
    {
        var currentLink = sliderLinks[i];
        var id = $(currentLink).attr("href").split("'")[1];

        for(var j = 0; j < idArray.length; j++)
        {
            if(idArray[j].id == id)
            {
                var image = idArray[j].source;
                
                for(var l = 0; l < images.length; l++)
                {
                    var filename = getRootFilenameFromURL(images[l]);
                    if (filename == image)
                    {
                        setLink(currentLink, l);
                        break;
                    }
                }
                
                break;
            }
        }
    }

    _nextButton.click(this.nextImage);
    _prevButton.click(this.prevImage);
}