source: extensions/rv_menutree/branches/2.0-radu/rvtree.js @ 3574

/* this is not directly used - compress it as rvtree-min.js on http://www.compressjavascript.com/ or somewhere else
Based on Matt Kruse <matt@mattkruse.com> http://www.mattkruse.com/ */
var XElement = {
        hasClassName: function(element, className) {
                if (!element) return false;
                var elementClassName = element.className;
                if (elementClassName.length == 0) return false;
                if (elementClassName == className ||
                                elementClassName.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
                        return true;
                return false;
        },

        addClassName: function(element, className) {
                if (!element) return;
                var classNames = element.className.split(/\s+/);
                for (var i=0; i<classNames.length; i++)
                        if (className==classNames[i]) return;
                classNames.splice(0,0,className);
                element.className = classNames.join(' ');
                return element;
        },

        toggleClassName: function(element, className) {
                if (!element) return;
                var classNames = element.className.split(/\s+/);
                for (var i=0; i<classNames.length; i++)
                        if (classNames[i]==className) break;
                if (i==classNames.length)
                        classNames.splice(0,0,className);
                else
                        classNames.splice(i, 1);
                element.className = classNames.join(' ');
                return element;
        }
};

var RVTree =
{
        options :
        {
                nodeClosedClass: "liClosed",
                nodeOpenClass: "liOpen",
                nodeBulletClass: "liBullet",
                nodeLinkClass: "bullet"
        },

        convertTree: function (root)
        {
                if (!document.createElement) return; // Without createElement, we can't do anything
                if (window.attachEvent && !window.opera)
                {
                        if ( new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})").exec( navigator.userAgent ) != null )
                                RVTree.options.IEVersion = parseFloat( RegExp.$1 );
                }
                RVTree._processList(root, true);
        },

        _processList: function(ul, isRoot)
        {
                if (!ul.childNodes || ul.childNodes.length==0) return;

                for (var i=0; i<ul.childNodes.length; i++)
                { //Iterate LIs
                        var item = ul.childNodes[i];
                        if (item.nodeName != "LI")
                                continue;

                        // Iterate things in this LI
                        var subLists = false;
                        for (var sitemi=0;sitemi<item.childNodes.length;sitemi++)
                        {
                                var sitem = item.childNodes[sitemi];
                                if (sitem.nodeName=="UL")
                                {
                                        subLists = true;
                                        RVTree._processList(sitem, false);
                                }
                        }

                        var s= document.createElement("SPAN");
                        var t= '\u00A0'; // &nbsp;
                        s.className = RVTree.options.nodeLinkClass;
                        if (subLists)
                        {
                                // This LI has UL's in it, so it's a +/- node
                                if ( !XElement.hasClassName(item, RVTree.options.nodeOpenClass) )
                                        XElement.addClassName(item, RVTree.options.nodeClosedClass);

                                // If it's just text, make the text work as the link also
                                if (item.firstChild.nodeName=="#text")
                                {
                                        t = t+item.firstChild.nodeValue;
                                        item.removeChild(item.firstChild);
                                }
                                s.onclick = function ()
                                {
                                        XElement.toggleClassName( this.parentNode, RVTree.options.nodeOpenClass );
                                        XElement.toggleClassName( this.parentNode, RVTree.options.nodeClosedClass );
                                        return false;
                                }
                        }
                        else
                        {// No sublists
                                if ( XElement.hasClassName(item, RVTree.options.nodeClosedClass) )
                                {
                                        s.onclick = function()
                                        {
                                                var nodes = this.parentNode.getElementsByTagName("A");
                                                if (nodes.length)
                                                        document.location = nodes[0].href;
                                        }
                                }
                                else
                                        XElement.addClassName(item, RVTree.options.nodeBulletClass);
                        }

                        item.style.listStyleType='none';
                        if (isRoot && RVTree.options.IEVersion && RVTree.options.IEVersion < 8)
                                item.style.marginLeft="-16px"; // thats IE6,IE7 ; IE8 seems more compliant
                        if (s)
                        {
                                s.appendChild(document.createTextNode(t));
                                item.insertBefore(s,item.firstChild);
                        }
                }
                ul.style.marginLeft = 0;
                ul.style.paddingLeft = isRoot ? 0 : "8px";
        }
}