/*!
 * Ext JS Library 3.3.0
 * Copyright(c) 2006-2010 Ext JS, Inc.
 * licensing@extjs.com
 * http://www.extjs.com/license
 */
/**
 * @class Ext.CompositeElementLite
 */
Ext.apply(Ext.CompositeElementLite.prototype, {
    addElements : function(els, root){
        if(!els){
            return this;
        }
        if(typeof els == "string"){
            els = Ext.Element.selectorFunction(els, root);
        }
        var yels = this.elements;
        Ext.each(els, function(e) {
            yels.push(Ext.get(e));
        });
        return this;
    },

    
/**
     * Returns the first Element
     * @return {Ext.Element}
     */
    first : function(){
        return this.item(0);
    },

    
/**
     * Returns the last Element
     * @return {Ext.Element}
     */
    last : function(){
        return this.item(this.getCount()-1);
    },

    
/**
     * Returns true if this composite contains the passed element
     * @param el {Mixed} The id of an element, or an Ext.Element, or an HtmlElement to find within the composite collection.
     * @return Boolean
     */
    contains : function(el){
        return this.indexOf(el) != -1;
    },

    
/**
    * Removes the specified element(s).
    * @param {Mixed} el The id of an element, the Element itself, the index of the element in this composite
    * or an array of any of those.
    * @param {Boolean} removeDom (optional) True to also remove the element from the document
    * @return {CompositeElement} this
    */
    removeElement : function(keys, removeDom){
        var me = this,
            els = this.elements,
            el;
        Ext.each(keys, function(val){
            if ((el = (els[val] || els[val = me.indexOf(val)]))) {
                if(removeDom){
                    if(el.dom){
                        el.remove();
                    }else{
                        Ext.removeNode(el);
                    }
                }
                els.splice(val, 1);
            }
        });
        return this;
    }
});