text: /**
   * @class Ext.CompositeElement
   * <p>This class encapsulates a <i>collection</i> of DOM elements, providing methods to filter
   * members, or to perform collective actions upon the whole set.</p>
   *
   * Example:<pre><code>
  var els = Ext.select("#some-el div.some-class");
  // or select directly from an existing element
  var el = Ext.get('some-el');
  el.select('div.some-class');
  
  els.setWidth(100); // all elements become 100 width
  els.hide(true); // all elements fade out and hide
  // or
  els.setWidth(100).hide(true);
  </code>
   */
  Ext.CompositeElement = function(els, root) {
      /**
       * <p>The Array of DOM elements which this CompositeElement encapsulates. Read-only.</p>
       * <p>This will not <i>usually</i> be accessed in developers' code, but developers wishing
       * to augment the capabilities of the CompositeElement class may use it when adding
       * methods to the class.</p>
       * <p>For example to add the <code>nextAll</code> method to the class to <b>add</b> all
       * following siblings of selected elements, the code would be</p><code><pre>
  Ext.override(Ext.CompositeElement, {
      nextAll: function() {
          var els = this.elements, i, l = els.length, n, r = [], ri = -1;
  
  //      Loop through all elements in this Composite, accumulating
  //      an Array of all siblings.
          for (i = 0; i < l; i++) {
              for (n = els[i].nextSibling; n; n = n.nextSibling) {
                  r[++ri] = n;
              }
          }
  
  //      Add all found siblings to this Composite
          return this.add(r);
      }
  });</pre></code>
       * @type Array
       * @property elements
       */
      this.elements = [];
      this.add(els, root);
      this.el = new Ext.Element.Flyweight();
  };
  
  Ext.CompositeElement.prototype = {
      isComposite: true,
  
      // private
      getElement : function(el) {
          // Set the shared flyweight dom property to the current element
          var e = this.el;
          e.dom = el;
          e.id = el.id;
          return e;
      },
  
      // private
      transformElement : function(el) {
          return Ext.getDom(el);
      },
  
      /**
       * Returns the number of elements in this Composite.
       * @return Number
       */
      getCount : function() {
          return this.elements.length;
      },
  
      /**
       * Adds elements to this Composite object.
       * @param {Mixed} els Either an Array of DOM elements to add, or another Composite object who's elements should be added.
       * @return {CompositeElement} This Composite object.
       */
      add : function(els, root) {
          var me = this,
              elements = me.elements;
          if (!els) {
              return this;
          }
          if (typeof els == 'string') {
              els = Ext.Element.selectorFunction(els, root);
          }
          else if (els.isComposite) {
              els = els.elements;
          }
          else if (!Ext.isIterable(els)) {
              els = [els];
          }
  
          for (var i = 0, len = els.length; i < len; ++i) {
              elements.push(me.transformElement(els[i]));
          }
  
          return me;
      },
  
      invoke : function(fn, args) {
          var me = this,
              els = me.elements,
              len = els.length,
              e,
              i;
  
          for (i = 0; i < len; i++) {
              e = els[i];
              if (e) {
                  Ext.Element.prototype[fn].apply(me.getElement(e), args);
              }
          }
          return me;
      },
      /**
       * Returns a flyweight Element of the dom element object at the specified index
       * @param {Number} index
       * @return {Ext.Element}
       */
      item : function(index) {
          var me = this,
              el = me.elements[index],
              out = null;
  
          if (el){
              out = me.getElement(el);
          }
          return out;
      },
  
      // fixes scope with flyweight
      addListener : function(eventName, handler, scope, opt) {
          var els = this.elements,
              len = els.length,
              i, e;
  
          for (i = 0; i<len; i++) {
              e = els[i];
              if (e) {
                  Ext.EventManager.on(e, eventName, handler, scope || e, opt);
              }
          }
          return this;
      },
  
      /**
       * <p>Calls the passed function for each element in this composite.</p>
       * @param {Function} fn The function to call. The function is passed the following parameters:<ul>
       * <li><b>el</b> : Element<div class="sub-desc">The current Element in the iteration.
       * <b>This is the flyweight (shared) Ext.Element instance, so if you require a
       * a reference to the dom node, use el.dom.</b></div></li>
       * <li><b>c</b> : Composite<div class="sub-desc">This Composite object.</div></li>
       * <li><b>idx</b> : Number<div class="sub-desc">The zero-based index in the iteration.</div></li>
       * </ul>
       * @param {Object} scope (optional) The scope (<i>this</i> reference) in which the function is executed. (defaults to the Element)
       * @return {CompositeElement} this
       */
      each : function(fn, scope) {
          var me = this,
              els = me.elements,
              len = els.length,
              i, e;
  
          for (i = 0; i<len; i++) {
              e = els[i];
              if (e) {
                  e = this.getElement(e);
                  if(fn.call(scope || e, e, me, i)){
                      break;
                  }
              }
          }
          return me;
      },
  
      /**
      * Clears this Composite and adds the elements passed.
      * @param {Mixed} els Either an array of DOM elements, or another Composite from which to fill this Composite.
      * @return {CompositeElement} this
      */
      fill : function(els) {
          var me = this;
          me.elements = [];
          me.add(els);
          return me;
      },
  
      /**
       * Filters this composite to only elements that match the passed selector.
       * @param {String/Function} selector A string CSS selector or a comparison function.
       * The comparison function will be called with the following arguments:<ul>
       * <li><code>el</code> : Ext.Element<div class="sub-desc">The current DOM element.</div></li>
       * <li><code>index</code> : Number<div class="sub-desc">The current index within the collection.</div></li>
       * </ul>
       * @return {CompositeElement} this
       */
      filter : function(selector) {
          var els = [],
              me = this,
              elements = me.elements,
              fn = Ext.isFunction(selector) ? selector
                  : function(el){
                      return el.is(selector);
                  };
  
          me.each(function(el, self, i){
              if(fn(el, i) !== false){
                  els[els.length] = me.transformElement(el);
              }
          });
          me.elements = els;
          return me;
      },
  
      /**
       * 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 {Mixed} el 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;
      },
  
      /**
       * Find the index of the passed element within the composite collection.
       * @param {Mixed} el The id of an element, or an Ext.Element, or an HtmlElement to find within the composite collection.
       * @return Number The index of the passed Ext.Element in the composite collection, or -1 if not found.
       */
      indexOf : function(el) {
          return this.elements.indexOf(this.transformElement(el));
      },
  
      /**
       * Removes all elements.
       */
      clear : function() {
          this.elements = [];
      }
  };
  
  Ext.CompositeElement.prototype.on = Ext.CompositeElement.prototype.addListener;
  
  (function(){
  var fnName,
      ElProto = Ext.Element.prototype,
      CelProto = Ext.CompositeElement.prototype;
  
  for (fnName in ElProto) {
      if (Ext.isFunction(ElProto[fnName])) {
          (function(fnName) {
              CelProto[fnName] = CelProto[fnName] || function(){
                  return this.invoke(fnName, arguments);
              };
          }).call(CelProto, fnName);
  
      }
  }
  })();
  
  if(Ext.DomQuery) {
      Ext.Element.selectorFunction = Ext.DomQuery.select;
  }
  
  /**
   * Selects elements based on the passed CSS selector to enable {@link Ext.Element Element} methods
   * to be applied to many related elements in one statement through the returned {@link Ext.CompositeElement CompositeElement} or
   * {@link Ext.CompositeElement CompositeElement} object.
   * @param {String/Array} selector The CSS selector or an array of elements
   * @param {HTMLElement/String} root (optional) The root element of the query or id of the root
   * @return {CompositeElement}
   * @member Ext.Element
   * @method select
   */
  Ext.Element.select = function(selector, root, composite) {
      var els;
      composite = (composite === false) ? false : true;
      if (typeof selector == "string") {
          els = Ext.Element.selectorFunction(selector, root);
      } else if (selector.length !== undefined) {
          els = selector;
      } else {
          throw new Error("Invalid selector");
      }
      return composite ? new Ext.CompositeElement(els) : els;
  };
  /**
   * Selects elements based on the passed CSS selector to enable {@link Ext.Element Element} methods
   * to be applied to many related elements in one statement through the returned {@link Ext.CompositeElement CompositeElement} or
   * {@link Ext.CompositeElement CompositeElement} object.
   * @param {String/Array} selector The CSS selector or an array of elements
   * @param {HTMLElement/String} root (optional) The root element of the query or id of the root
   * @return {CompositeElement}
   * @member Ext
   * @method select
   */
  Ext.select = Ext.Element.select;
  
  // Backwards compatibility with desktop
  Ext.CompositeElementLite = Ext.CompositeElement;
  
  /**
   * @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;
      },
  
      /**
      * 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;
      },
  
      /**
      * Replaces the specified element with the passed element.
      * @param {Mixed} el The id of an element, the Element itself, the index of the element in this composite
      * to replace.
      * @param {Mixed} replacement The id of an element or the Element itself.
      * @param {Boolean} domReplace (Optional) True to remove and replace the element in the document too.
      * @return {CompositeElement} this
      */
      replaceElement : function(el, replacement, domReplace){
          var index = !isNaN(el) ? el : this.indexOf(el),
              d;
          if(index > -1){
              replacement = Ext.getDom(replacement);
              if(domReplace){
                  d = this.elements[index];
                  d.parentNode.insertBefore(replacement, d);
                  Ext.removeNode(d);
              }
              this.elements.splice(index, 1, replacement);
          }
          return this;
      }
  });
  