/*
 * Ext JS Library 1.1 RC 1
 * Copyright(c) 2006-2007, Ext JS, LLC.
 * licensing@extjs.com
 * 
 * http://www.extjs.com/license
 */

/**
 * The TreeNode UI implementation is separate from the
 * tree implementation. Unless you are customizing the tree UI,
 * you should never have to use this directly.
 */
Ext.tree.TreeNodeUI = function(node){
    this.node = node;
    this.rendered = false;
    this.animating = false;
    this.emptyIcon = Ext.BLANK_IMAGE_URL;
};

Ext.tree.TreeNodeUI.prototype = {
    removeChild : function(node){
        if(this.rendered){
            this.ctNode.removeChild(node.ui.getEl());
        }
    },

    beforeLoad : function(){
         this.addClass("x-tree-node-loading");
    },

    afterLoad : function(){
         this.removeClass("x-tree-node-loading");
    },

    onTextChange : function(node, text, oldText){
        if(this.rendered){
            this.textNode.innerHTML = text;
        }
    },

    onDisableChange : function(node, state){
        this.disabled = state;
        if(state){
            this.addClass("x-tree-node-disabled");
        }else{
            this.removeClass("x-tree-node-disabled");
        }
    },

    onSelectedChange : function(state){
        if(state){
            this.focus();
            this.addClass("x-tree-selected");
        }else{
            //this.blur();
            this.removeClass("x-tree-selected");
        }
    },

    onMove : function(tree, node, oldParent, newParent, index, refNode){
        this.childIndent = null;
        if(this.rendered){
            var targetNode = newParent.ui.getContainer();
            if(!targetNode){//target not rendered
                this.holder = document.createElement("div");
                this.holder.appendChild(this.wrap);
                return;
            }
            var insertBefore = refNode ? refNode.ui.getEl() : null;
            if(insertBefore){
                targetNode.insertBefore(this.wrap, insertBefore);
            }else{
                targetNode.appendChild(this.wrap);
            }
            this.node.renderIndent(true);
        }
    },

    addClass : function(cls){
        if(this.elNode){
            Ext.fly(this.elNode).addClass(cls);
        }
    },

    removeClass : function(cls){
        if(this.elNode){
            Ext.fly(this.elNode).removeClass(cls);
        }
    },

    remove : function(){
        if(this.rendered){
            this.holder = document.createElement("div");
            this.holder.appendChild(this.wrap);
        }
    },

    fireEvent : function(){
        return this.node.fireEvent.apply(this.node, arguments);
    },

    initEvents : function(){
        this.node.on("move", this.onMove, this);
        var E = Ext.EventManager;
        var a = this.anchor;

        var el = Ext.fly(a, '_treeui');

        if(Ext.isOpera){ // opera render bug ignores the CSS
            el.setStyle("text-decoration", "none");
        }

        el.on("click", this.onClick, this);
        el.on("dblclick", this.onDblClick, this);

        if(this.checkbox){
            Ext.EventManager.on(this.checkbox, "change", this.onCheckChange, this);
        }

        el.on("contextmenu", this.onContextMenu, this);

        var icon = Ext.fly(this.iconNode);
        icon.on("click", this.onClick, this);
        icon.on("dblclick", this.onDblClick, this);
        icon.on("contextmenu", this.onContextMenu, this);
        E.on(this.ecNode, "click", this.ecClick, this, true);

        if(this.node.disabled){
            this.addClass("x-tree-node-disabled");
        }
        if(this.node.hidden){
            this.addClass("x-tree-node-disabled");
        }
        var ot = this.node.getOwnerTree();
        var dd = ot.enableDD || ot.enableDrag || ot.enableDrop;
        if(dd && (!this.node.isRoot || ot.rootVisible)){
            Ext.dd.Registry.register(this.elNode, {
                node: this.node,
                handles: [this.iconNode, this.textNode],
                isHandle: false
            });
        }
    },

    hide : function(){
        if(this.rendered){
            this.wrap.style.display = "none";
        }
    },

    show : function(){
        if(this.rendered){
            this.wrap.style.display = "";
        }
    },

    onContextMenu : function(e){
        if (this.node.hasListener("contextmenu") || this.node.getOwnerTree().hasListener("contextmenu")) {
            e.preventDefault();
            this.focus();
            this.fireEvent("contextmenu", this.node, e);
        }
    },

    onClick : function(e){
        if(this.dropping){
            e.stopEvent();
            return;
        }
        if(this.fireEvent("beforeclick", this.node, e) !== false){
            if(!this.disabled && this.node.attributes.href){
                this.fireEvent("click", this.node, e);
                return;
            }
            e.preventDefault();
            if(this.disabled){
                return;
            }

            if(this.node.attributes.singleClickExpand && !this.animating && this.node.hasChildNodes()){
                this.node.toggle();
            }

            this.fireEvent("click", this.node, e);
        }else{
            e.stopEvent();
        }
    },

    onDblClick : function(e){
        e.preventDefault();
        if(this.disabled){
            return;
        }
        if(this.checkbox){
            this.toggleCheck();
        }
        if(!this.animating && this.node.hasChildNodes()){
            this.node.toggle();
        }
        this.fireEvent("dblclick", this.node, e);
    },

    onCheckChange : function(){
        var checked = this.checkbox.checked;
        this.node.attributes.checked = checked;
        this.fireEvent('checkchange', this.node, checked);
    },

    ecClick : function(e){
        if(!this.animating && this.node.hasChildNodes()){
            this.node.toggle();
        }
    },

    startDrop : function(){
        this.dropping = true;
    },

    // delayed drop so the click event doesn't get fired on a drop
    endDrop : function(){
       setTimeout(function(){
           this.dropping = false;
       }.createDelegate(this), 50);
    },

    expand : function(){
        this.updateExpandIcon();
        this.ctNode.style.display = "";
    },

    focus : function(){
        if(!this.node.preventHScroll){
            try{this.anchor.focus();
            }catch(e){}
        }else if(!Ext.isIE){
            try{
                var noscroll = this.node.getOwnerTree().getTreeEl().dom;
                var l = noscroll.scrollLeft;
                this.anchor.focus();
                noscroll.scrollLeft = l;
            }catch(e){}
        }
    },

    toggleCheck : function(value){
        var cb = this.checkbox;
        if(cb){
            cb.checked = (value === undefined ? !cb.checked : value);
        }
    },

    blur : function(){
        try{
            this.anchor.blur();
        }catch(e){}