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<title>The source code</title>
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<pre class="prettyprint lang-js">/**
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* @class Ext.Element
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*/
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Ext.Element.addMethods(function(){
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var PARENTNODE = 'parentNode',
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NEXTSIBLING = 'nextSibling',
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PREVIOUSSIBLING = 'previousSibling',
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DQ = Ext.DomQuery,
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GET = Ext.get;
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return {
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<div id="method-Ext.Element-findParent"></div>/**
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* Looks at this node and then at parent nodes for a match of the passed simple selector (e.g. div.some-class or span:first-child)
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* @param {String} selector The simple selector to test
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* @param {Number/Mixed} maxDepth (optional) The max depth to search as a number or element (defaults to 50 || document.body)
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* @param {Boolean} returnEl (optional) True to return a Ext.Element object instead of DOM node
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* @return {HTMLElement} The matching DOM node (or null if no match was found)
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*/
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findParent : function(simpleSelector, maxDepth, returnEl){
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var p = this.dom,
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b = document.body,
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depth = 0,
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stopEl;
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if(Ext.isGecko && Object.prototype.toString.call(p) == '[object XULElement]') {
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return null;
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}
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maxDepth = maxDepth || 50;
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if (isNaN(maxDepth)) {
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stopEl = Ext.getDom(maxDepth);
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maxDepth = Number.MAX_VALUE;
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}
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while(p && p.nodeType == 1 && depth < maxDepth && p != b && p != stopEl){
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if(DQ.is(p, simpleSelector)){
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return returnEl ? GET(p) : p;
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}
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depth++;
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p = p.parentNode;
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}
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return null;
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},
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<div id="method-Ext.Element-findParentNode"></div>/**
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* Looks at parent nodes for a match of the passed simple selector (e.g. div.some-class or span:first-child)
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* @param {String} selector The simple selector to test
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* @param {Number/Mixed} maxDepth (optional) The max depth to
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search as a number or element (defaults to 10 || document.body)
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* @param {Boolean} returnEl (optional) True to return a Ext.Element object instead of DOM node
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* @return {HTMLElement} The matching DOM node (or null if no match was found)
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*/
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findParentNode : function(simpleSelector, maxDepth, returnEl){
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var p = Ext.fly(this.dom.parentNode, '_internal');
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return p ? p.findParent(simpleSelector, maxDepth, returnEl) : null;
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},
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<div id="method-Ext.Element-up"></div>/**
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* Walks up the dom looking for a parent node that matches the passed simple selector (e.g. div.some-class or span:first-child).
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* This is a shortcut for findParentNode() that always returns an Ext.Element.
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* @param {String} selector The simple selector to test
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* @param {Number/Mixed} maxDepth (optional) The max depth to
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search as a number or element (defaults to 10 || document.body)
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* @return {Ext.Element} The matching DOM node (or null if no match was found)
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*/
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up : function(simpleSelector, maxDepth){
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return this.findParentNode(simpleSelector, maxDepth, true);
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},
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<div id="method-Ext.Element-select"></div>/**
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* Creates a {@link Ext.CompositeElement} for child nodes based on the passed CSS selector (the selector should not contain an id).
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* @param {String} selector The CSS selector
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* @return {CompositeElement/CompositeElementLite} The composite element
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*/
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select : function(selector){
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return Ext.Element.select(selector, this.dom);
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},
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<div id="method-Ext.Element-query"></div>/**
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* Selects child nodes based on the passed CSS selector (the selector should not contain an id).
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* @param {String} selector The CSS selector
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* @return {Array} An array of the matched nodes
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*/
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query : function(selector){
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return DQ.select(selector, this.dom);
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},
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<div id="method-Ext.Element-child"></div>/**
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* Selects a single child at any depth below this element based on the passed CSS selector (the selector should not contain an id).
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* @param {String} selector The CSS selector
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* @param {Boolean} returnDom (optional) True to return the DOM node instead of Ext.Element (defaults to false)
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* @return {HTMLElement/Ext.Element} The child Ext.Element (or DOM node if returnDom = true)
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*/
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child : function(selector, returnDom){
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var n = DQ.selectNode(selector, this.dom);
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return returnDom ? n : GET(n);
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},
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<div id="method-Ext.Element-down"></div>/**
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* Selects a single *direct* child based on the passed CSS selector (the selector should not contain an id).
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* @param {String} selector The CSS selector
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* @param {Boolean} returnDom (optional) True to return the DOM node instead of Ext.Element (defaults to false)
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* @return {HTMLElement/Ext.Element} The child Ext.Element (or DOM node if returnDom = true)
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*/
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down : function(selector, returnDom){
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var n = DQ.selectNode(" > " + selector, this.dom);
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return returnDom ? n : GET(n);
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},
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<div id="method-Ext.Element-parent"></div>/**
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* Gets the parent node for this element, optionally chaining up trying to match a selector
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* @param {String} selector (optional) Find a parent node that matches the passed simple selector
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* @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
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* @return {Ext.Element/HTMLElement} The parent node or null
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*/
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parent : function(selector, returnDom){
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return this.matchNode(PARENTNODE, PARENTNODE, selector, returnDom);
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},
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<div id="method-Ext.Element-next"></div>/**
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* Gets the next sibling, skipping text nodes
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* @param {String} selector (optional) Find the next sibling that matches the passed simple selector
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* @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
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* @return {Ext.Element/HTMLElement} The next sibling or null
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*/
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next : function(selector, returnDom){
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return this.matchNode(NEXTSIBLING, NEXTSIBLING, selector, returnDom);
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},
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<div id="method-Ext.Element-prev"></div>/**
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* Gets the previous sibling, skipping text nodes
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* @param {String} selector (optional) Find the previous sibling that matches the passed simple selector
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* @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
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* @return {Ext.Element/HTMLElement} The previous sibling or null
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*/
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prev : function(selector, returnDom){
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return this.matchNode(PREVIOUSSIBLING, PREVIOUSSIBLING, selector, returnDom);
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},
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<div id="method-Ext.Element-first"></div>/**
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* Gets the first child, skipping text nodes
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* @param {String} selector (optional) Find the next sibling that matches the passed simple selector
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* @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
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* @return {Ext.Element/HTMLElement} The first child or null
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*/
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first : function(selector, returnDom){
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return this.matchNode(NEXTSIBLING, 'firstChild', selector, returnDom);
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},
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<div id="method-Ext.Element-last"></div>/**
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* Gets the last child, skipping text nodes
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* @param {String} selector (optional) Find the previous sibling that matches the passed simple selector
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* @param {Boolean} returnDom (optional) True to return a raw dom node instead of an Ext.Element
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* @return {Ext.Element/HTMLElement} The last child or null
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*/
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last : function(selector, returnDom){
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return this.matchNode(PREVIOUSSIBLING, 'lastChild', selector, returnDom);
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},
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matchNode : function(dir, start, selector, returnDom){
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var n = this.dom[start];
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while(n){
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if(n.nodeType == 1 && (!selector || DQ.is(n, selector))){
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return !returnDom ? GET(n) : n;
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}
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n = n[dir];
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}
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return null;
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}
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}
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}());</pre>
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