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9 <pre class="prettyprint lang-js">/*!
10 * Ext JS Library 3.2.2
11 * Copyright(c) 2006-2010 Ext JS, Inc.
13 * http://www.extjs.com/license
16 * @class Ext.DomHelper
17 * <p>The DomHelper class provides a layer of abstraction from DOM and transparently supports creating
18 * elements via DOM or using HTML fragments. It also has the ability to create HTML fragment templates
19 * from your DOM building code.</p>
21 * <p><b><u>DomHelper element specification object</u></b></p>
22 * <p>A specification object is used when creating elements. Attributes of this object
23 * are assumed to be element attributes, except for 4 special attributes:
24 * <div class="mdetail-params"><ul>
25 * <li><b><tt>tag</tt></b> : <div class="sub-desc">The tag name of the element</div></li>
26 * <li><b><tt>children</tt></b> : or <tt>cn</tt><div class="sub-desc">An array of the
27 * same kind of element definition objects to be created and appended. These can be nested
28 * as deep as you want.</div></li>
29 * <li><b><tt>cls</tt></b> : <div class="sub-desc">The class attribute of the element.
30 * This will end up being either the "class" attribute on a HTML fragment or className
31 * for a DOM node, depending on whether DomHelper is using fragments or DOM.</div></li>
32 * <li><b><tt>html</tt></b> : <div class="sub-desc">The innerHTML for the element</div></li>
35 * <p><b><u>Insertion methods</u></b></p>
36 * <p>Commonly used insertion methods:
37 * <div class="mdetail-params"><ul>
38 * <li><b><tt>{@link #append}</tt></b> : <div class="sub-desc"></div></li>
39 * <li><b><tt>{@link #insertBefore}</tt></b> : <div class="sub-desc"></div></li>
40 * <li><b><tt>{@link #insertAfter}</tt></b> : <div class="sub-desc"></div></li>
41 * <li><b><tt>{@link #overwrite}</tt></b> : <div class="sub-desc"></div></li>
42 * <li><b><tt>{@link #createTemplate}</tt></b> : <div class="sub-desc"></div></li>
43 * <li><b><tt>{@link #insertHtml}</tt></b> : <div class="sub-desc"></div></li>
46 * <p><b><u>Example</u></b></p>
47 * <p>This is an example, where an unordered list with 3 children items is appended to an existing
48 * element with id <tt>'my-div'</tt>:<br>
50 var dh = Ext.DomHelper; // create shorthand alias
51 // specification object
56 // append children after creating
57 children: [ // may also specify 'cn' instead of 'children'
58 {tag: 'li', id: 'item0', html: 'List Item 0'},
59 {tag: 'li', id: 'item1', html: 'List Item 1'},
60 {tag: 'li', id: 'item2', html: 'List Item 2'}
64 'my-div', // the context element 'my-div' can either be the id or the actual node
65 spec // the specification object
68 * <p>Element creation specification parameters in this class may also be passed as an Array of
69 * specification objects. This can be used to insert multiple sibling nodes into an existing
70 * container very efficiently. For example, to add more list items to the example above:<pre><code>
72 {tag: 'li', id: 'item3', html: 'List Item 3'},
73 {tag: 'li', id: 'item4', html: 'List Item 4'}
77 * <p><b><u>Templating</u></b></p>
78 * <p>The real power is in the built-in templating. Instead of creating or appending any elements,
79 * <tt>{@link #createTemplate}</tt> returns a Template object which can be used over and over to
80 * insert new elements. Revisiting the example above, we could utilize templating this time:
83 var list = dh.append('my-div', {tag: 'ul', cls: 'my-list'});
85 var tpl = dh.createTemplate({tag: 'li', id: 'item{0}', html: 'List Item {0}'});
87 for(var i = 0; i < 5, i++){
88 tpl.append(list, [i]); // use template to append to the actual node
91 * <p>An example using a template:<pre><code>
92 var html = '<a id="{0}" href="{1}" class="nav">{2}</a>';
94 var tpl = new Ext.DomHelper.createTemplate(html);
95 tpl.append('blog-roll', ['link1', 'http://www.jackslocum.com/', "Jack's Site"]);
96 tpl.append('blog-roll', ['link2', 'http://www.dustindiaz.com/', "Dustin's Site"]);
99 * <p>The same example using named parameters:<pre><code>
100 var html = '<a id="{id}" href="{url}" class="nav">{text}</a>';
102 var tpl = new Ext.DomHelper.createTemplate(html);
103 tpl.append('blog-roll', {
105 url: 'http://www.jackslocum.com/',
106 text: "Jack's Site"
108 tpl.append('blog-roll', {
110 url: 'http://www.dustindiaz.com/',
111 text: "Dustin's Site"
115 * <p><b><u>Compiling Templates</u></b></p>
116 * <p>Templates are applied using regular expressions. The performance is great, but if
117 * you are adding a bunch of DOM elements using the same template, you can increase
118 * performance even further by {@link Ext.Template#compile "compiling"} the template.
119 * The way "{@link Ext.Template#compile compile()}" works is the template is parsed and
120 * broken up at the different variable points and a dynamic function is created and eval'ed.
121 * The generated function performs string concatenation of these parts and the passed
122 * variables instead of using regular expressions.
124 var html = '<a id="{id}" href="{url}" class="nav">{text}</a>';
126 var tpl = new Ext.DomHelper.createTemplate(html);
129 //... use template like normal
132 * <p><b><u>Performance Boost</u></b></p>
133 * <p>DomHelper will transparently create HTML fragments when it can. Using HTML fragments instead
134 * of DOM can significantly boost performance.</p>
135 * <p>Element creation specification parameters may also be strings. If {@link #useDom} is <tt>false</tt>,
136 * then the string is used as innerHTML. If {@link #useDom} is <tt>true</tt>, a string specification
137 * results in the creation of a text node. Usage:</p>
139 Ext.DomHelper.useDom = true; // force it to use DOM; reduces performance
143 Ext.DomHelper = function(){
144 var tempTableEl = null,
145 emptyTags = /^(?:br|frame|hr|img|input|link|meta|range|spacer|wbr|area|param|col)$/i,
146 tableRe = /^table|tbody|tr|td$/i,
147 confRe = /tag|children|cn|html$/i,
148 tableElRe = /td|tr|tbody/i,
149 cssRe = /([a-z0-9-]+)\s*:\s*([^;\s]+(?:\s*[^;\s]+)*);?/gi,
152 // kill repeat to save bytes
153 afterbegin = 'afterbegin',
154 afterend = 'afterend',
155 beforebegin = 'beforebegin',
156 beforeend = 'beforeend',
165 function doInsert(el, o, returnElement, pos, sibling, append){
166 var newNode = pub.insertHtml(pos, Ext.getDom(el), createHtml(o));
167 return returnElement ? Ext.get(newNode, true) : newNode;
170 // build as innerHTML where available
171 function createHtml(o){
178 if(typeof o == "string"){
180 } else if (Ext.isArray(o)) {
181 for (var i=0; i < o.length; i++) {
183 b += createHtml(o[i]);
187 b += '<' + (o.tag = o.tag || 'div');
190 if(!confRe.test(attr)){
191 if (typeof val == "object") {
192 b += ' ' + attr + '="';
194 b += key + ':' + val[key] + ';';
198 b += ' ' + ({cls : 'class', htmlFor : 'for'}[attr] || attr) + '="' + val + '"';
202 // Now either just close the tag or try to add children and close the tag.
203 if (emptyTags.test(o.tag)) {
207 if ((cn = o.children || o.cn)) {
212 b += '</' + o.tag + '>';
218 function ieTable(depth, s, h, e){
219 tempTableEl.innerHTML = [s, h, e].join('');
226 // If the result is multiple siblings, then encapsulate them into one fragment.
227 if(ns = el.nextSibling){
228 var df = document.createDocumentFragment();
241 * Nasty code for IE's broken table implementation
243 function insertIntoTable(tag, where, el, html) {
247 tempTableEl = tempTableEl || document.createElement('div');
249 if(tag == 'td' && (where == afterbegin || where == beforeend) ||
250 !tableElRe.test(tag) && (where == beforebegin || where == afterend)) {
253 before = where == beforebegin ? el :
254 where == afterend ? el.nextSibling :
255 where == afterbegin ? el.firstChild : null;
257 if (where == beforebegin || where == afterend) {
261 if (tag == 'td' || (tag == 'tr' && (where == beforeend || where == afterbegin))) {
262 node = ieTable(4, trs, html, tre);
263 } else if ((tag == 'tbody' && (where == beforeend || where == afterbegin)) ||
264 (tag == 'tr' && (where == beforebegin || where == afterend))) {
265 node = ieTable(3, tbs, html, tbe);
267 node = ieTable(2, ts, html, te);
269 el.insertBefore(node, before);
275 <div id="method-Ext.DomHelper-markup"></div>/**
276 * Returns the markup for the passed Element(s) config.
277 * @param {Object} o The DOM object spec (and children)
280 markup : function(o){
281 return createHtml(o);
284 <div id="method-Ext.DomHelper-applyStyles"></div>/**
285 * Applies a style specification to an element.
286 * @param {String/HTMLElement} el The element to apply styles to
287 * @param {String/Object/Function} styles A style specification string e.g. 'width:100px', or object in the form {width:'100px'}, or
288 * a function which returns such a specification.
290 applyStyles : function(el, styles){
295 if (typeof styles == "function") {
296 styles = styles.call();
298 if (typeof styles == "string") {
299 while ((matches = cssRe.exec(styles))) {
300 el.setStyle(matches[1], matches[2]);
302 } else if (typeof styles == "object") {
308 <div id="method-Ext.DomHelper-insertHtml"></div>/**
309 * Inserts an HTML fragment into the DOM.
310 * @param {String} where Where to insert the html in relation to el - beforeBegin, afterBegin, beforeEnd, afterEnd.
311 * @param {HTMLElement} el The context element
312 * @param {String} html The HTML fragment
313 * @return {HTMLElement} The new node
315 insertHtml : function(where, el, html){
324 where = where.toLowerCase();
325 // add these here because they are used in both branches of the condition.
326 hash[beforebegin] = ['BeforeBegin', 'previousSibling'];
327 hash[afterend] = ['AfterEnd', 'nextSibling'];
329 if (el.insertAdjacentHTML) {
330 if(tableRe.test(el.tagName) && (rs = insertIntoTable(el.tagName.toLowerCase(), where, el, html))){
333 // add these two to the hash.
334 hash[afterbegin] = ['AfterBegin', 'firstChild'];
335 hash[beforeend] = ['BeforeEnd', 'lastChild'];
336 if ((hashVal = hash[where])) {
337 el.insertAdjacentHTML(hashVal[0], html);
338 return el[hashVal[1]];
341 range = el.ownerDocument.createRange();
342 setStart = 'setStart' + (endRe.test(where) ? 'After' : 'Before');
345 frag = range.createContextualFragment(html);
346 el.parentNode.insertBefore(frag, where == beforebegin ? el : el.nextSibling);
347 return el[(where == beforebegin ? 'previous' : 'next') + 'Sibling'];
349 rangeEl = (where == afterbegin ? 'first' : 'last') + 'Child';
351 range[setStart](el[rangeEl]);
352 frag = range.createContextualFragment(html);
353 if(where == afterbegin){
354 el.insertBefore(frag, el.firstChild);
356 el.appendChild(frag);
364 throw 'Illegal insertion point -> "' + where + '"';
367 <div id="method-Ext.DomHelper-insertBefore"></div>/**
368 * Creates new DOM element(s) and inserts them before el.
369 * @param {Mixed} el The context element
370 * @param {Object/String} o The DOM object spec (and children) or raw HTML blob
371 * @param {Boolean} returnElement (optional) true to return a Ext.Element
372 * @return {HTMLElement/Ext.Element} The new node
374 insertBefore : function(el, o, returnElement){
375 return doInsert(el, o, returnElement, beforebegin);
378 <div id="method-Ext.DomHelper-insertAfter"></div>/**
379 * Creates new DOM element(s) and inserts them after el.
380 * @param {Mixed} el The context element
381 * @param {Object} o The DOM object spec (and children)
382 * @param {Boolean} returnElement (optional) true to return a Ext.Element
383 * @return {HTMLElement/Ext.Element} The new node
385 insertAfter : function(el, o, returnElement){
386 return doInsert(el, o, returnElement, afterend, 'nextSibling');
389 <div id="method-Ext.DomHelper-insertFirst"></div>/**
390 * Creates new DOM element(s) and inserts them as the first child of el.
391 * @param {Mixed} el The context element
392 * @param {Object/String} o The DOM object spec (and children) or raw HTML blob
393 * @param {Boolean} returnElement (optional) true to return a Ext.Element
394 * @return {HTMLElement/Ext.Element} The new node
396 insertFirst : function(el, o, returnElement){
397 return doInsert(el, o, returnElement, afterbegin, 'firstChild');
400 <div id="method-Ext.DomHelper-append"></div>/**
401 * Creates new DOM element(s) and appends them to el.
402 * @param {Mixed} el The context element
403 * @param {Object/String} o The DOM object spec (and children) or raw HTML blob
404 * @param {Boolean} returnElement (optional) true to return a Ext.Element
405 * @return {HTMLElement/Ext.Element} The new node
407 append : function(el, o, returnElement){
408 return doInsert(el, o, returnElement, beforeend, '', true);
411 <div id="method-Ext.DomHelper-overwrite"></div>/**
412 * Creates new DOM element(s) and overwrites the contents of el with them.
413 * @param {Mixed} el The context element
414 * @param {Object/String} o The DOM object spec (and children) or raw HTML blob
415 * @param {Boolean} returnElement (optional) true to return a Ext.Element
416 * @return {HTMLElement/Ext.Element} The new node
418 overwrite : function(el, o, returnElement){
420 el.innerHTML = createHtml(o);
421 return returnElement ? Ext.get(el.firstChild) : el.firstChild;
424 createHtml : createHtml