YAHOO.widget.TreeView = function(id) {
    if (id) { this.init(id); }
};

YAHOO.widget.TreeView.prototype = {

    id: null,
    _el: null,

    _nodes: null,

    locked: false,

    _expandAnim: null,
    _collapseAnim: null,

    _animCount: 0,

    maxAnim: 2,

    setExpandAnim: function(type) {
        if (YAHOO.widget.TVAnim.isValid(type)) {
            this._expandAnim = type;
        }
    },

    setCollapseAnim: function(type) {
        if (YAHOO.widget.TVAnim.isValid(type)) {
            this._collapseAnim = type;
        }
    },

    animateExpand: function(el, node) {

        if (this._expandAnim && this._animCount < this.maxAnim) {
            // this.locked = true;
            var tree = this;
            var a = YAHOO.widget.TVAnim.getAnim(this._expandAnim, el, 
                            function() { tree.expandComplete(node); });
            if (a) { 
                ++this._animCount;
                this.fireEvent("animStart", {
                        "node": node, 
                        "type": "expand"
                    });
                a.animate();
            }

            return true;
        }

        return false;
    },

    animateCollapse: function(el, node) {

        if (this._collapseAnim && this._animCount < this.maxAnim) {
            // this.locked = true;
            var tree = this;
            var a = YAHOO.widget.TVAnim.getAnim(this._collapseAnim, el, 
                            function() { tree.collapseComplete(node); });
            if (a) { 
                ++this._animCount;
                this.fireEvent("animStart", {
                        "node": node, 
                        "type": "collapse"
                    });
                a.animate();
            }

            return true;
        }

        return false;
    },

    /**
     * Function executed when the expand animation completes
     * @method expandComplete
     */
    expandComplete: function(node) {
        --this._animCount;
        this.fireEvent("animComplete", {
                "node": node, 
                "type": "expand"
            });
        // this.locked = false;
    },

    /**
     * Function executed when the collapse animation completes
     * @method collapseComplete
     */
    collapseComplete: function(node) {
        --this._animCount;
        this.fireEvent("animComplete", {
                "node": node, 
                "type": "collapse"
            });
        // this.locked = false;
    },

    init: function(id) {

        this.id = id;

        if ("string" !== typeof id) {
            this._el = id;
            this.id = this.generateId(id);
        }

        this.createEvent("animStart", this);

        this.createEvent("animComplete", this);

        this.createEvent("collapse", this);

        this.createEvent("collapseComplete", this);
        this.createEvent("expand", this);

        this.createEvent("expandComplete", this);

        this._nodes = [];

        // store a global reference
        YAHOO.widget.TreeView.trees[this.id] = this;

        // Set up the root node
        this.root = new YAHOO.widget.RootNode(this);

        var LW = YAHOO.widget.LogWriter;
    },
    draw: function() {
        var html = this.root.getHtml();
        this.getEl().innerHTML = html;
        this.firstDraw = false;
    },

    getEl: function() {
        if (! this._el) {
            this._el = document.getElementById(this.id);
        }
        return this._el;
    },

    regNode: function(node) {
        this._nodes[node.index] = node;
    },


    getRoot: function() {
        return this.root;
    },


    setDynamicLoad: function(fnDataLoader, iconMode) { 
        this.root.setDynamicLoad(fnDataLoader, iconMode);
    },


    expandAll: function() { 
        if (!this.locked) {
            this.root.expandAll(); 
        }
    },
    collapseAll: function() { 
        if (!this.locked) {
            this.root.collapseAll(); 
        }
    },

    getNodeByIndex: function(nodeIndex) {
        var n = this._nodes[nodeIndex];
        return (n) ? n : null;
    },

    getNodeByProperty: function(property, value) {
        for (var i in this._nodes) {
            var n = this._nodes[i];
            if (n.data && value == n.data[property]) {
                return n;
            }
        }

        return null;
    },

    getNodesByProperty: function(property, value) {
        var values = [];
        for (var i in this._nodes) {
            var n = this._nodes[i];
            if (n.data && value == n.data[property]) {
                values.push(n);
            }
        }

        return (values.length) ? values : null;
    },


    removeNode: function(node, autoRefresh) { 

        // Don't delete the root node
        if (node.isRoot()) {
            return false;
        }

        // Get the branch that we may need to refresh
        var p = node.parent;
        if (p.parent) {
            p = p.parent;
        }

        // Delete the node and its children
        this._deleteNode(node);

        // Refresh the parent of the parent
        if (autoRefresh && p && p.childrenRendered) {
            p.refresh();
        }

        return true;
    },

    _removeChildren_animComplete: function(o) {
        this.unsubscribe(this._removeChildren_animComplete);
        this.removeChildren(o.node);
    },

    removeChildren: function(node) { 

        if (node.expanded) {
            // wait until the animation is complete before deleting to
            // avoid javascript errors
            if (this._collapseAnim) {
                this.subscribe("animComplete", 
                        this._removeChildren_animComplete, this, true);
                node.collapse();
                return;
            }

            node.collapse();
        }

        while (node.children.length) {
            this._deleteNode(node.children[0]);
        }

        node.childrenRendered = false;
        node.dynamicLoadComplete = false;

        node.updateIcon();
    },

    _deleteNode: function(node) { 
        // Remove all the child nodes first
        this.removeChildren(node);

        // Remove the node from the tree
        this.popNode(node);
    },

    popNode: function(node) { 
        var p = node.parent;

        // Update the parent's collection of children
        var a = [];

        for (var i=0, len=p.children.length;i<len;++i) {
            if (p.children[i] != node) {
                a[a.length] = p.children[i];
            }
        }

        p.children = a;

        // reset the childrenRendered flag for the parent
        p.childrenRendered = false;

         // Update the sibling relationship
        if (node.previousSibling) {
            node.previousSibling.nextSibling = node.nextSibling;
        }

        if (node.nextSibling) {
            node.nextSibling.previousSibling = node.previousSibling;
        }

        node.parent = null;
        node.previousSibling = null;
        node.nextSibling = null;
        node.tree = null;

        // Update the tree's node collection 
        delete this._nodes[node.index];
    },

    toString: function() {
        return "TreeView " + this.id;
    },

    generateId: function(el) {
        var id = el.id;

        if (!id) {
            id = "yui-tv-auto-id-" + YAHOO.widget.TreeView.counter;
            ++YAHOO.widget.TreeView.counter;
        }

        return id;
    },

    onExpand: function(node) { },

    onCollapse: function(node) { }

};

YAHOO.augment(YAHOO.widget.TreeView, YAHOO.util.EventProvider);

YAHOO.widget.TreeView.nodeCount = 0;

YAHOO.widget.TreeView.trees = [];

YAHOO.widget.TreeView.counter = 0;

YAHOO.widget.TreeView.getTree = function(treeId) {
    var t = YAHOO.widget.TreeView.trees[treeId];
    return (t) ? t : null;
};

YAHOO.widget.TreeView.getNode = function(treeId, nodeIndex) {
    var t = YAHOO.widget.TreeView.getTree(treeId);
    return (t) ? t.getNodeByIndex(nodeIndex) : null;
};

YAHOO.widget.TreeView.getNode_mn = function(treeId, typeId) {
    var t = YAHOO.widget.TreeView.getTree(treeId);
    return (t) ? t.getNodeByProperty("id",typeId) : null;
};

YAHOO.widget.TreeView.addHandler = function (el, sType, fn) {
    if (el.addEventListener) {
        el.addEventListener(sType, fn, false);
    } else if (el.attachEvent) {
        el.attachEvent("on" + sType, fn);
    }
};

YAHOO.widget.TreeView.removeHandler = function (el, sType, fn) {
    if (el.removeEventListener) {
        el.removeEventListener(sType, fn, false);
    } else if (el.detachEvent) {
        el.detachEvent("on" + sType, fn);
    }
};

YAHOO.widget.TreeView.preload = function(e, prefix) {
    prefix = prefix || "ygtv";


    var styles = ["tn","tm","tmh","tp","tph","ln","lm","lmh","lp","lph","loading"];
    // var styles = ["tp"];

    var sb = [];
    
    // save the first one for the outer container
    for (var i=1; i < styles.length; i=i+1) { 
        sb[sb.length] = '<span class="' + prefix + styles[i] + '">&#160;</span>';
    }

    var f = document.createElement("div");
    var s = f.style;
    s.className = prefix + styles[0];
    s.position = "absolute";
    s.height = "1px";
    s.width = "1px";
    s.top = "-1000px";
    s.left = "-1000px";
    f.innerHTML = sb.join("");

    document.body.appendChild(f);

    YAHOO.widget.TreeView.removeHandler(window, 
                "load", YAHOO.widget.TreeView.preload);

};

YAHOO.widget.TreeView.addHandler(window, 
                "load", YAHOO.widget.TreeView.preload);

YAHOO.widget.Node = function(oData, oParent, expanded) {
    if (oData) { this.init(oData, oParent, expanded); }
};

YAHOO.widget.Node.prototype = {

    index: 0,

    children: null,

    tree: null,

    data: null,

    parent: null,

    depth: -1,

    href: null,

    target: "_self",

    expanded: false,

    multiExpand: true,

    renderHidden: false,

    childrenRendered: false,

    dynamicLoadComplete: false,

    previousSibling: null,

    nextSibling: null,
    _dynLoad: false,

    dataLoader: null,
    isLoading: false,
    hasIcon: true,
    iconMode: 0,
    nowrap: false,

    _type: "Node",

    init: function(oData, oParent, expanded) {

        this.data       = oData;
        this.children   = [];
        this.index      = YAHOO.widget.TreeView.nodeCount;
        ++YAHOO.widget.TreeView.nodeCount;
        this.expanded   = expanded;

        this.createEvent("parentChange", this);

        // oParent should never be null except when we create the root node.
        if (oParent) {
            oParent.appendChild(this);
        }
    },

    applyParent: function(parentNode) {
        if (!parentNode) {
            return false;
        }

        this.tree   = parentNode.tree;
        this.parent = parentNode;
        this.depth  = parentNode.depth + 1;

        if (!this.href) {
            this.href = "javascript:" + this.getToggleLink();
        }

        this.tree.regNode(this);
        parentNode.childrenRendered = false;

        // cascade update existing children
        for (var i=0, len=this.children.length;i<len;++i) {
            this.children[i].applyParent(this);
        }

        this.fireEvent("parentChange");

        return true;
    },

    appendChild: function(childNode) {
        if (this.hasChildren()) {
            var sib = this.children[this.children.length - 1];
            sib.nextSibling = childNode;
            childNode.previousSibling = sib;
        }
        this.children[this.children.length] = childNode;
        childNode.applyParent(this);
        if (this.childrenRendered && this.expanded) {
            this.getChildrenEl().style.display = "";
        }

        return childNode;
    },

    appendTo: function(parentNode) {
        return parentNode.appendChild(this);
    },

    insertBefore: function(node) {
        var p = node.parent;
        if (p) {

            if (this.tree) {
                this.tree.popNode(this);
            }

            var refIndex = node.isChildOf(p);
            p.children.splice(refIndex, 0, this);
            if (node.previousSibling) {
                node.previousSibling.nextSibling = this;
            }
            this.previousSibling = node.previousSibling;
            this.nextSibling = node;
            node.previousSibling = this;

            this.applyParent(p);
        }

        return this;
    },
 
    insertAfter: function(node) {
        var p = node.parent;
        if (p) {

            if (this.tree) {
                this.tree.popNode(this);
            }

            var refIndex = node.isChildOf(p);

            if (!node.nextSibling) {
                this.nextSibling = null;
                return this.appendTo(p);
            }

            p.children.splice(refIndex + 1, 0, this);

            node.nextSibling.previousSibling = this;
            this.previousSibling = node;
            this.nextSibling = node.nextSibling;
            node.nextSibling = this;

            this.applyParent(p);
        }

        return this;
    },

    isChildOf: function(parentNode) {
        if (parentNode && parentNode.children) {
            for (var i=0, len=parentNode.children.length; i<len ; ++i) {
                if (parentNode.children[i] === this) {
                    return i;
                }
            }
        }

        return -1;
    },

    getSiblings: function() {
        return this.parent.children;
    },

    showChildren: function() {
		if (!this.tree.animateExpand(this.getChildrenEl(), this)) {
            if (this.hasChildren()) {
                this.getChildrenEl().style.display = "";
            }
        }
    },

    hideChildren: function() {

        if (!this.tree.animateCollapse(this.getChildrenEl(), this)) {
            this.getChildrenEl().style.display = "none";
        }
    },

    getElId: function() {
        return "ygtv" + this.index;
    },

    getChildrenElId: function() {
        return "ygtvc" + this.index;
    },

    getToggleElId: function() {
        return "ygtvt" + this.index;
    },
	
	getToggleElbelId: function() {
        return "ygtvlabelel" + this.index;
    },

    getEl: function() {
        return document.getElementById(this.getElId());
    },
    getChildrenEl: function() {
        return document.getElementById(this.getChildrenElId());
    },
    getToggleEl: function() {
        return document.getElementById(this.getToggleElId());
    },

    getToggleLink: function() {
        return "YAHOO.widget.TreeView.getNode(\'" + this.tree.id + "\'," + 
            this.index + ").toggle()";
    },

    collapse: function() {
        // Only collapse if currently expanded
        if (!this.expanded) { return; }

        // fire the collapse event handler
        var ret = this.tree.onCollapse(this);

        if (false === ret) {
            return;
        }

        ret = this.tree.fireEvent("collapse", this);

        if (false === ret) {
            return;
        }


        if (!this.getEl()) {
            this.expanded = false;
        } else {
            // hide the child div
            this.hideChildren();
            this.expanded = false;

            this.updateIcon();
        }

        // this.getSpacer().title = this.getStateText();

        ret = this.tree.fireEvent("collapseComplete", this);

    },

    expand: function(lazySource) {
        // Only expand if currently collapsed.
        if (this.expanded) { return; }
        var ret = true;
        if (!lazySource) {
            // fire the expand event handler
            ret = this.tree.onExpand(this);

            if (false === ret) {
                return;
            }
            
            ret = this.tree.fireEvent("expand", this);
        }

        if (false === ret) {
            return;
        }

        if (!this.getEl()) {
            this.expanded = true;
            return;
        }

        if (! this.childrenRendered) {
            this.getChildrenEl().innerHTML = this.renderChildren();
        } else {
        }

        this.expanded = true;

        this.updateIcon();

        if (this.isLoading) {
            this.expanded = false;
            return;
        }

        if (! this.multiExpand) {
            var sibs = this.getSiblings();
            for (var i=0; i<sibs.length; ++i) {
                if (sibs[i] != this && sibs[i].expanded) { 
                    sibs[i].collapse(); 
                }
            }
        }

        this.showChildren();

        ret = this.tree.fireEvent("expandComplete", this);
    },

    updateIcon: function() {
        if (this.hasIcon) {
            var el = this.getToggleEl();
            if (el) {
                el.className = this.getStyle();
            }
        }
    },

    getStyle: function() {
        if (this.isLoading) {
            return "ygtvloading";
        } else {
            var loc = (this.nextSibling) ? "t" : "l";

            var type = "n";
            if (this.hasChildren(true) || (this.isDynamic() && !this.getIconMode())) {
                type = (this.expanded) ? "m" : "p";
            }

            return "ygtv" + loc + type;
        }
    },

    getHoverStyle: function() { 
        var s = this.getStyle();
        if (this.hasChildren(true) && !this.isLoading) { 
            s += "h"; 
        }
        return s;
    },

    expandAll: function() { 
        for (var i=0;i<this.children.length;++i) {
            var c = this.children[i];
            if (c.isDynamic()) {
                alert("Not supported (lazy load + expand all)");
                break;
            } else if (! c.multiExpand) {
                alert("Not supported (no multi-expand + expand all)");
                break;
            } else {
                c.expand();
                c.expandAll();
            }
        }
    },

    collapseAll: function() { 
        for (var i=0;i<this.children.length;++i) {
            this.children[i].collapse();
            this.children[i].collapseAll();
        }
    },

    setDynamicLoad: function(fnDataLoader, iconMode) { 
        if (fnDataLoader) {
            this.dataLoader = fnDataLoader;
            this._dynLoad = true;
        } else {
            this.dataLoader = null;
            this._dynLoad = false;
        }

        if (iconMode) {
            this.iconMode = iconMode;
        }
    },

    isRoot: function() { 
        return (this == this.tree.root);
    },

    isDynamic: function() { 
        var lazy = (!this.isRoot() && (this._dynLoad || this.tree.root._dynLoad));
        return lazy;
    },

    getIconMode: function() {
        return (this.iconMode || this.tree.root.iconMode);
    },

    hasChildren: function(checkForLazyLoad) { 
//        return ( this.children.length > 0 || (checkForLazyLoad && this.isDynamic() && !this.dynamicLoadComplete) );
		return ( this.children.length > 0 || (checkForLazyLoad && this.isDynamic()) );
    },
    toggle: function() {
        if (!this.tree.locked && ( this.hasChildren(true) || this.isDynamic()) ) {
            if (this.expanded) { this.collapse(); } else { this.expand(); }
        }
    },

    getHtml: function() {

        this.childrenRendered = false;

        var sb = [];
        sb[sb.length] = '<div class="ygtvitem" id="' + this.getElId() + '">';
        sb[sb.length] = this.getNodeHtml();
        sb[sb.length] = this.getChildrenHtml();
        sb[sb.length] = '</div>';
        return sb.join("");
    },

    getChildrenHtml: function() {


        var sb = [];
        sb[sb.length] = '<div class="ygtvchildren"';
        sb[sb.length] = ' id="' + this.getChildrenElId() + '"';

        if (!this.expanded || !this.hasChildren()) {
            sb[sb.length] = ' style="display:none;"';
        }
        sb[sb.length] = '>';

        // Don't render the actual child node HTML unless this node is expanded.
        if ( (this.hasChildren(true) && this.expanded) ||
                (this.renderHidden && !this.isDynamic()) ) {
            sb[sb.length] = this.renderChildren();
        }

        sb[sb.length] = '</div>';

        return sb.join("");
    },

    renderChildren: function() {


        var node = this;

        if (this.isDynamic() && !this.dynamicLoadComplete) {
            this.isLoading = true;
            this.tree.locked = true;

            if (this.dataLoader) {

                setTimeout( 
                    function() {
                        node.dataLoader(node, 
                            function() { 
                                node.loadComplete(); 
                            });
                    }, 10);
                
            } else if (this.tree.root.dataLoader) {

                setTimeout( 
                    function() {
                        node.tree.root.dataLoader(node, 
                            function() { 
                                node.loadComplete(); 
                            });
                    }, 10);

            } else {
                return "Error: data loader not found or not specified.";
            }

            return "";

        } else {
            return this.completeRender();
        }
    },

    completeRender: function() {
        var sb = [];

        for (var i=0; i < this.children.length; ++i) {
            // this.children[i].childrenRendered = false;
            sb[sb.length] = this.children[i].getHtml();
        }
        
        this.childrenRendered = true;

        return sb.join("");
    },

    loadComplete: function() {
        this.getChildrenEl().innerHTML = this.completeRender();
        this.dynamicLoadComplete = true;
        this.isLoading = false;
        this.expand(true);
        this.tree.locked = false;
    },

    getAncestor: function(depth) {
        if (depth >= this.depth || depth < 0)  {
            return null;
        }

        var p = this.parent;
        
        while (p.depth > depth) {
            p = p.parent;
        }

        return p;
    },

    getDepthStyle: function(depth) {
        return (this.getAncestor(depth).nextSibling) ? 
            "ygtvdepthcell" : "ygtvblankdepthcell";
    },

    getNodeHtml: function() { 
        return ""; 
    },

    refresh: function() {
        // this.loadComplete();
        this.getChildrenEl().innerHTML = this.completeRender();

        if (this.hasIcon) {
            var el = this.getToggleEl();
            if (el) {
                el.className = this.getStyle();
            }
        }
    },

    /**
     * Node toString
     * @method toString
     * @return {string} string representation of the node
     */
    toString: function() {
        return "Node (" + this.index + ")";
    }

};

YAHOO.augment(YAHOO.widget.Node, YAHOO.util.EventProvider);

YAHOO.widget.TextNode = function(oData, oParent, expanded) {

    if (oData) { 
        this.init(oData, oParent, expanded);
        this.setUpLabel(oData);
    }

};

YAHOO.extend(YAHOO.widget.TextNode, YAHOO.widget.Node, {
    
    labelStyle: "ygtvlabel",

    labelElId: null,

    label: null,

    textNodeParentChange: function() {
        if (this.tree && !this.tree.hasEvent("labelClick")) {
            this.tree.createEvent("labelClick", this.tree);
        }
       
    },

    setUpLabel: function(oData) { 
        
        // set up the custom event on the tree
        this.textNodeParentChange();
        this.subscribe("parentChange", this.textNodeParentChange);

        if (typeof oData == "string") {
            oData = { label: oData };
        }
        this.label = oData.label;
        this.data.label = oData.label;
        
        // update the link
        if (oData.href) {
            this.href = oData.href;
        }

        // set the target
        if (oData.target) {
            this.target = oData.target;
        }

        if (oData.style) {
            this.labelStyle = oData.style;
        }

        this.labelElId = "ygtvlabelel" + this.index;
    },

    getLabelEl: function() { 
        return document.getElementById(this.labelElId);
    },

    // overrides YAHOO.widget.Node
    getNodeHtml: function() { 
        var sb = [];

        sb[sb.length] = '<table border="0" cellpadding="0" cellspacing="0">';
        sb[sb.length] = '<tr>';
        
        for (var i=0;i<this.depth;++i) {
            //sb[sb.length] = '<td><div class="' + this.getDepthStyle(i) + '">&#160;</div></td>';
            //sb[sb.length] = '<td><div class="' + this.getDepthStyle(i) + '"></div></td>';
            sb[sb.length] = '<td class="' + this.getDepthStyle(i) + '"><div class="ygtvspacer"></div></td>';
        }

        var getNode = 'YAHOO.widget.TreeView.getNode(\'' +
                        this.tree.id + '\',' + this.index + ')';

        sb[sb.length] = '<td';
        // sb[sb.length] = ' onselectstart="return false"';
        sb[sb.length] = ' id="' + this.getToggleElId() + '"';
        sb[sb.length] = ' class="' + this.getStyle() + '"';
        if (this.hasChildren(true)) {
            sb[sb.length] = ' onmouseover="this.className=';
            sb[sb.length] = getNode + '.getHoverStyle()"';
            sb[sb.length] = ' onmouseout="this.className=';
            sb[sb.length] = getNode + '.getStyle()"';
        }
        sb[sb.length] = ' onclick="javascript:' + this.getToggleLink() + '">';

        sb[sb.length] = '<div class="ygtvspacer">';

        /*
        sb[sb.length] = '<img id="' + this.getSpacerId() + '"';
        sb[sb.length] = ' alt=""';
        sb[sb.length] = ' tabindex=0';
        sb[sb.length] = ' src="' + this.spacerPath + '"';
        sb[sb.length] = ' title="' + this.getStateText() + '"';
        sb[sb.length] = ' class="ygtvspacer"';
        // sb[sb.length] = ' onkeypress="return ' + getNode + '".onKeyPress()"';
        sb[sb.length] = ' />';
        */

        //sb[sb.length] = '&#160;';

        sb[sb.length] = '</div>';
        sb[sb.length] = '</td>';
        sb[sb.length] = '<td ';
        sb[sb.length] = (this.nowrap) ? ' nowrap="nowrap" ' : '';
        sb[sb.length] = ' >';
        sb[sb.length] = '<a';
        sb[sb.length] = ' id="' + this.labelElId + '"';
        sb[sb.length] = ' class="' + this.labelStyle + '"';
        sb[sb.length] = ' href="' + this.href + '"';
        sb[sb.length] = ' target="' + this.target + '"';
        sb[sb.length] = ' onclick="return ' + getNode + '.onLabelClick(' + getNode +')"';
        if (this.hasChildren(true)) {
            sb[sb.length] = ' onmouseover="document.getElementById(\'';
            sb[sb.length] = this.getToggleElId() + '\').className=';
            sb[sb.length] = getNode + '.getHoverStyle()"';
            sb[sb.length] = ' onmouseout="document.getElementById(\'';
            sb[sb.length] = this.getToggleElId() + '\').className=';
            sb[sb.length] = getNode + '.getStyle()"';
        }
        sb[sb.length] = ' >';
        sb[sb.length] = this.label;
        sb[sb.length] = '</a>';
        sb[sb.length] = '</td>';
        sb[sb.length] = '</tr>';
        sb[sb.length] = '</table>';

        return sb.join("");
    },

    onLabelClick: function(me) { 
        return me.tree.fireEvent("labelClick", me);
        //return true;
    },

    toString: function() { 
        return "TextNode (" + this.index + ") " + this.label;
    }

});
YAHOO.widget.RootNode = function(oTree) {
	this.init(null, null, true);
	
	this.tree = oTree;
};

YAHOO.extend(YAHOO.widget.RootNode, YAHOO.widget.Node, {
    
    getNodeHtml: function() { 
        return ""; 
    },

    toString: function() { 
        return "RootNode";
    },

    loadComplete: function() { 
        this.tree.draw();
    },

    collapse: function() {},
    expand: function() {}

});
YAHOO.widget.HTMLNode = function(oData, oParent, expanded, hasIcon) {
    if (oData) { 
        this.init(oData, oParent, expanded);
        this.initContent(oData, hasIcon);
    }
};

YAHOO.extend(YAHOO.widget.HTMLNode, YAHOO.widget.Node, {

    contentStyle: "ygtvhtml",

    contentElId: null,

    content: null,

    initContent: function(oData, hasIcon) { 
        this.setHtml(oData);
        this.contentElId = "ygtvcontentel" + this.index;
        this.hasIcon = hasIcon;

    },

    setHtml: function(o) {

        this.data = o;
        this.html = (typeof o === "string") ? o : o.html;

        var el = this.getContentEl();
        if (el) {
            el.innerHTML = this.html;
        }

    },

    getContentEl: function() { 
        return document.getElementById(this.contentElId);
    },

    // overrides YAHOO.widget.Node
    getNodeHtml: function() { 
        var sb = [];

        sb[sb.length] = '<table border="0" cellpadding="0" cellspacing="0">';
        sb[sb.length] = '<tr>';
        
        for (var i=0;i<this.depth;++i) {
            //sb[sb.length] = '<td class="' + this.getDepthStyle(i) + '">&#160;</td>';
            sb[sb.length] = '<td class="' + this.getDepthStyle(i) + '"><div class="ygtvspacer"></div></td>';
        }

        if (this.hasIcon) {
            sb[sb.length] = '<td';
            sb[sb.length] = ' id="' + this.getToggleElId() + '"';
            sb[sb.length] = ' class="' + this.getStyle() + '"';
            sb[sb.length] = ' onclick="javascript:' + this.getToggleLink() + '"';
            if (this.hasChildren(true)) {
                sb[sb.length] = ' onmouseover="this.className=';
                sb[sb.length] = 'YAHOO.widget.TreeView.getNode(\'';
                sb[sb.length] = this.tree.id + '\',' + this.index +  ').getHoverStyle()"';
                sb[sb.length] = ' onmouseout="this.className=';
                sb[sb.length] = 'YAHOO.widget.TreeView.getNode(\'';
                sb[sb.length] = this.tree.id + '\',' + this.index +  ').getStyle()"';
            }
            //sb[sb.length] = '>&#160;</td>';
            sb[sb.length] = '><div class="ygtvspacer"></div></td>';
        }

        sb[sb.length] = '<td';
        sb[sb.length] = ' id="' + this.contentElId + '"';
        sb[sb.length] = ' class="' + this.contentStyle + '"';
        sb[sb.length] = (this.nowrap) ? ' nowrap="nowrap" ' : '';
        sb[sb.length] = ' >';
        sb[sb.length] = this.html;
        sb[sb.length] = '</td>';
        sb[sb.length] = '</tr>';
        sb[sb.length] = '</table>';

        return sb.join("");
    },

    toString: function() { 
        return "HTMLNode (" + this.index + ")";
    }

});
YAHOO.widget.MenuNode = function(oData, oParent, expanded) {
	if (oData) { 
		this.init(oData, oParent, expanded);
		this.setUpLabel(oData);
	}

    /*
     * Menus usually allow only one branch to be open at a time.
     */
	this.multiExpand = false;


};

YAHOO.extend(YAHOO.widget.MenuNode, YAHOO.widget.TextNode, {

    toString: function() { 
        return "MenuNode (" + this.index + ") " + this.label;
    }

});
YAHOO.widget.TVAnim = function() {
    return {
        FADE_IN: "TVFadeIn",

        FADE_OUT: "TVFadeOut",

        getAnim: function(type, el, callback) {
            if (YAHOO.widget[type]) {
                return new YAHOO.widget[type](el, callback);
            } else {
                return null;
            }
        },

        isValid: function(type) {
            return (YAHOO.widget[type]);
        }
    };
} ();

YAHOO.widget.TVFadeIn = function(el, callback) {
    this.el = el;
    this.callback = callback;

};

YAHOO.widget.TVFadeIn.prototype = {
    animate: function() {
        var tvanim = this;

        var s = this.el.style;
        s.opacity = 0.1;
        s.filter = "alpha(opacity=10)";
        s.display = "";

        var dur = 0.4; 
        var a = new YAHOO.util.Anim(this.el, {opacity: {from: 0.1, to: 1, unit:""}}, dur);
        a.onComplete.subscribe( function() { tvanim.onComplete(); } );
        a.animate();
    },

    onComplete: function() {
        this.callback();
    },

    toString: function() {
        return "TVFadeIn";
    }
};

YAHOO.widget.TVFadeOut = function(el, callback) {
    this.el = el;
    this.callback = callback;

};

YAHOO.widget.TVFadeOut.prototype = {
    animate: function() {
        var tvanim = this;
        var dur = 0.4;
        var a = new YAHOO.util.Anim(this.el, {opacity: {from: 1, to: 0.1, unit:""}}, dur);
        a.onComplete.subscribe( function() { tvanim.onComplete(); } );
        a.animate();
    },

    onComplete: function() {
        var s = this.el.style;
        s.display = "none";
        // s.opacity = 1;
        s.filter = "alpha(opacity=100)";
        this.callback();
    },
    toString: function() {
        return "TVFadeOut";
    }
};

YAHOO.register("treeview", YAHOO.widget.TreeView, {version: "2.3.1", build: "541"});