/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
/**
 * @class Ext.CompositeElementLite
 * <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>
 * <p>Although they are not listed, this class supports all of the methods of {@link Ext.Element} and
 * {@link Ext.Fx}. The methods from these classes will be performed on all the elements in this collection.</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.CompositeElementLite = 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 CompositeElementLite 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.CompositeElementLite, {
    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.CompositeElementLite.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) === false){
                    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,
            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;
    },

    /**
     * Find the index of the passed element within the composite collection.
     * @param el {Mixed} 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));
    },

    /**
    * 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;
    },

    /**
     * Removes all elements.
     */
    clear : function(){
        this.elements = [];
    }
};

Ext.CompositeElementLite.prototype.on = Ext.CompositeElementLite.prototype.addListener;

/**
 * @private
 * Copies all of the functions from Ext.Element's prototype onto CompositeElementLite's prototype.
 * This is called twice - once immediately below, and once again after additional Ext.Element
 * are added in Ext JS
 */
Ext.CompositeElementLite.importElementMethods = function() {
    var fnName,
        ElProto = Ext.Element.prototype,
        CelProto = Ext.CompositeElementLite.prototype;

    for (fnName in ElProto) {
        if (typeof ElProto[fnName] == 'function'){
            (function(fnName) {
                CelProto[fnName] = CelProto[fnName] || function() {
                    return this.invoke(fnName, arguments);
                };
            }).call(CelProto, fnName);

        }
    }
};

Ext.CompositeElementLite.importElementMethods();

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.CompositeElementLite CompositeElementLite} 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 {CompositeElementLite/CompositeElement}
 * @member Ext.Element
 * @method select
 * @static
 */
Ext.Element.select = function(selector, root){
    var els;
    if(typeof selector == "string"){
        els = Ext.Element.selectorFunction(selector, root);
    }else if(selector.length !== undefined){
        els = selector;
    }else{
        throw "Invalid selector";
    }
    return new Ext.CompositeElementLite(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.CompositeElementLite CompositeElementLite} 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 {CompositeElementLite/CompositeElement}
 * @member Ext
 * @method select
 */
Ext.select = Ext.Element.select;
