source: main/trunk/greenstone3/web/interfaces/default/js/classifier_scripts.js@ 33128

var inProgress = new Array();
var openClassifiers = new Array();
var busy = false;

function isExpanded(sectionID)
{
    var divElem = gs.jqGet("div" + sectionID);
    if(!divElem.css("display") || divElem.css("display") != "none")
    {
        return true;
    }
    return false;
}

// TODO: Is there a better solution
function _basicToggleSection(sectionID) {
    // Leave this function here, even though it's empty.
    // This function is here because:
    // - it mirrors the identically named version in document_scripts
    // - and this allows map_scripts to override it without knowing whether it's
    //   overriding classifier_scripts::toggleSection() or document_scripts::toggleSection().
    
    // This method is not meant to call toggleSection. If anything it would be the other way around
    // (as occurs in doc_scripts.js). But this method has to remain empty for classifier_scripts.js
    // since map_scripts largely repeats classifier_scripts.js::toggleSection() code.
}

function toggleSection(sectionID)
{
    var section = gs.jqGet("div" + sectionID);
    var sectionToggle = gs.jqGet("toggle" + sectionID);
    
    if(sectionToggle == undefined)
    {
        return;
    }
    
    //If the div exists
    if(section.length)
    {
        if(isExpanded(sectionID))
        {
            section.css("display", "none");
            sectionToggle.attr("src", gs.imageURLs.expand);

            if(openClassifiers[sectionID] != undefined)
            {
                delete openClassifiers[sectionID];
            }
        }
        else
        {
            section.css("display", "block");
            sectionToggle.attr("src", gs.imageURLs.collapse);
            openClassifiers[sectionID] = true;  
        }
        updateOpenClassifiers();
    }
    else
    {
        httpRequest(sectionID);
    }
}

function updateOpenClassifiers()
{
    var oc = "";
    var first = true;
    for(var key in openClassifiers)
    {
        if(first)
        {
            first = false;
        }
        else
        {
            oc += ",";
        }
        
        oc += key;
    }
    
    if(oc != undefined)
    {
        window.location.hash = oc;
    }
}

function openStoredClassifiers()
{
    if(window.location.hash != undefined && window.location.hash.length > 1)
    {
        var toOpen = window.location.hash.substring(1,window.location.hash.length).split(",");
        var loopFunction = function(sectionArray, index)
        {
            if(!busy && index < sectionArray.length)
            {
                busy = true;
                toggleSection(sectionArray[index]);
                setTimeout(function()
                {
                    loopFunction(sectionArray, index + 1);
                }, 25);
                
                return true;
            }
            
            setTimeout(function()
            {
                loopFunction(sectionArray, index);
            }, 25);
            return false;
        }
        
        if(toOpen.length > 0)
        {
            loopFunction(toOpen, 0);
        }
    }
}

function httpRequest(sectionID)
{
    if(!inProgress[sectionID])
    {
        inProgress[sectionID] = true;
        
        var sectionToggle = gs.jqGet("toggle" + sectionID);
        sectionToggle.attr("src", gs.imageURLs.loading);
        
        var url = gs.xsltParams.library_name + "/collection/" + gs.cgiParams.c + "/browse/" + sectionID.replace(/\./g, "/") + "?excerptid=div" + sectionID;

        if(gs.cgiParams.berrybasket == "on")
        {
            url = url + "&berrybasket=on";
        } 

        if(url.indexOf("#") != -1)
        {
            url = url.substring(0, url.indexOf("#"));
        }
        
        $.ajax(url)
        .success(function(data)
        {
            var newDiv = $("<div>");                                        
            var sibling = gs.jqGet("title" + sectionID);
            sibling.after(newDiv);
            
            newDiv.html(data);
            sectionToggle.attr("src", gs.imageURLs.collapse);
            openClassifiers[sectionID] = true;  
            
            if(gs.cgiParams.berrybasket == "on")
            {
                checkout();
            }
            else if(gs.cgiParams.documentbasket == "on")
            {
                dmcheckout();
            }
            updateOpenClassifiers();
        })
        .error(function()
        {
            sectionToggle.attr("src", gs.imageURLs.expand);
        })
        .complete(function()
        {
            inProgress[sectionID] = false;
            busy = false;
        });
    }
}