www.gusucode.com > 一个基于extjs的强大聊天插件源码程序 > 一个基于extjs的强大聊天插件/extjame/ext-jame/js/ext2/source/core/Template.js
/*
* Ext JS Library 2.0.2
* Copyright(c) 2006-2008, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
/**
* @class Ext.Template
* Represents an HTML fragment template. Templates can be precompiled for greater performance.
* For a list of available format functions, see {@link Ext.util.Format}.<br />
* Usage:
<pre><code>
var t = new Ext.Template(
'<div name="{id}">',
'<span class="{cls}">{name:trim} {value:ellipsis(10)}</span>',
'</div>'
);
t.append('some-element', {id: 'myid', cls: 'myclass', name: 'foo', value: 'bar'});
</code></pre>
* For more information see this blog post with examples: <a href="http://www.jackslocum.com/blog/2006/10/06/domhelper-create-elements-using-dom-html-fragments-or-templates/">DomHelper - Create Elements using DOM, HTML fragments and Templates</a>.
* @constructor
* @param {String/Array} html The HTML fragment or an array of fragments to join("") or multiple arguments to join("")
*/
Ext.Template = function(html){
var a = arguments;
if(Ext.isArray(html)){
html = html.join("");
}else if(a.length > 1){
var buf = [];
for(var i = 0, len = a.length; i < len; i++){
if(typeof a[i] == 'object'){
Ext.apply(this, a[i]);
}else{
buf[buf.length] = a[i];
}
}
html = buf.join('');
}
/**@private*/
this.html = html;
if(this.compiled){
this.compile();
}
};
Ext.Template.prototype = {
/**
* Returns an HTML fragment of this template with the specified values applied.
* @param {Object/Array} values The template values. Can be an array if your params are numeric (i.e. {0}) or an object (i.e. {foo: 'bar'})
* @return {String} The HTML fragment
*/
applyTemplate : function(values){
if(this.compiled){
return this.compiled(values);
}
var useF = this.disableFormats !== true;
var fm = Ext.util.Format, tpl = this;
var fn = function(m, name, format, args){
if(format && useF){
if(format.substr(0, 5) == "this."){
return tpl.call(format.substr(5), values[name], values);
}else{
if(args){
// quoted values are required for strings in compiled templates,
// but for non compiled we need to strip them
// quoted reversed for jsmin
var re = /^\s*['"](.*)["']\s*$/;
args = args.split(',');
for(var i = 0, len = args.length; i < len; i++){
args[i] = args[i].replace(re, "$1");
}
args = [values[name]].concat(args);
}else{
args = [values[name]];
}
return fm[format].apply(fm, args);
}
}else{
return values[name] !== undefined ? values[name] : "";
}
};
return this.html.replace(this.re, fn);
},
/**
* Sets the HTML used as the template and optionally compiles it.
* @param {String} html
* @param {Boolean} compile (optional) True to compile the template (defaults to undefined)
* @return {Ext.Template} this
*/
set : function(html, compile){
this.html = html;
this.compiled = null;
if(compile){
this.compile();
}
return this;
},
/**
* True to disable format functions (defaults to false)
* @type Boolean
*/
disableFormats : false,
/**
* The regular expression used to match template variables
* @type RegExp
* @property
*/
re : /\{([\w-]+)(?:\:([\w\.]*)(?:\((.*?)?\))?)?\}/g,
/**
* Compiles the template into an internal function, eliminating the RegEx overhead.
* @return {Ext.Template} this
*/
compile : function(){
var fm = Ext.util.Format;
var useF = this.disableFormats !== true;
var sep = Ext.isGecko ? "+" : ",";
var fn = function(m, name, format, args){
if(format && useF){
args = args ? ',' + args : "";
if(format.substr(0, 5) != "this."){
format = "fm." + format + '(';
}else{
format = 'this.call("'+ format.substr(5) + '", ';
args = ", values";
}
}else{
args= ''; format = "(values['" + name + "'] == undefined ? '' : ";
}
return "'"+ sep + format + "values['" + name + "']" + args + ")"+sep+"'";
};
var body;
// branched to use + in gecko and [].join() in others
if(Ext.isGecko){
body = "this.compiled = function(values){ return '" +
this.html.replace(/\\/g, '\\\\').replace(/(\r\n|\n)/g, '\\n').replace(/'/g, "\\'").replace(this.re, fn) +
"';};";
}else{
body = ["this.compiled = function(values){ return ['"];
body.push(this.html.replace(/\\/g, '\\\\').replace(/(\r\n|\n)/g, '\\n').replace(/'/g, "\\'").replace(this.re, fn));
body.push("'].join('');};");
body = body.join('');
}
eval(body);
return this;
},
// private function used to call members
call : function(fnName, value, allValues){
return this[fnName](value, allValues);
},
/**
* Applies the supplied values to the template and inserts the new node(s) as the first child of el.
* @param {Mixed} el The context element
* @param {Object/Array} values The template values. Can be an array if your params are numeric (i.e. {0}) or an object (i.e. {foo: 'bar'})
* @param {Boolean} returnElement (optional) true to return a Ext.Element (defaults to undefined)
* @return {HTMLElement/Ext.Element} The new node or Element
*/
insertFirst: function(el, values, returnElement){
return this.doInsert('afterBegin', el, values, returnElement);
},
/**
* Applies the supplied values to the template and inserts the new node(s) before el.
* @param {Mixed} el The context element
* @param {Object/Array} values The template values. Can be an array if your params are numeric (i.e. {0}) or an object (i.e. {foo: 'bar'})
* @param {Boolean} returnElement (optional) true to return a Ext.Element (defaults to undefined)
* @return {HTMLElement/Ext.Element} The new node or Element
*/
insertBefore: function(el, values, returnElement){
return this.doInsert('beforeBegin', el, values, returnElement);
},
/**
* Applies the supplied values to the template and inserts the new node(s) after el.
* @param {Mixed} el The context element
* @param {Object/Array} values The template values. Can be an array if your params are numeric (i.e. {0}) or an object (i.e. {foo: 'bar'})
* @param {Boolean} returnElement (optional) true to return a Ext.Element (defaults to undefined)
* @return {HTMLElement/Ext.Element} The new node or Element
*/
insertAfter : function(el, values, returnElement){
return this.doInsert('afterEnd', el, values, returnElement);
},
/**
* Applies the supplied values to the template and appends the new node(s) to el.
* @param {Mixed} el The context element
* @param {Object/Array} values The template values. Can be an array if your params are numeric (i.e. {0}) or an object (i.e. {foo: 'bar'})
* @param {Boolean} returnElement (optional) true to return a Ext.Element (defaults to undefined)
* @return {HTMLElement/Ext.Element} The new node or Element
*/
append : function(el, values, returnElement){
return this.doInsert('beforeEnd', el, values, returnElement);
},
doInsert : function(where, el, values, returnEl){
el = Ext.getDom(el);
var newNode = Ext.DomHelper.insertHtml(where, el, this.applyTemplate(values));
return returnEl ? Ext.get(newNode, true) : newNode;
},
/**
* Applies the supplied values to the template and overwrites the content of el with the new node(s).
* @param {Mixed} el The context element
* @param {Object/Array} values The template values. Can be an array if your params are numeric (i.e. {0}) or an object (i.e. {foo: 'bar'})
* @param {Boolean} returnElement (optional) true to return a Ext.Element (defaults to undefined)
* @return {HTMLElement/Ext.Element} The new node or Element
*/
overwrite : function(el, values, returnElement){
el = Ext.getDom(el);
el.innerHTML = this.applyTemplate(values);
return returnElement ? Ext.get(el.firstChild, true) : el.firstChild;
}
};
/**
* Alias for {@link #applyTemplate}
* @method
*/
Ext.Template.prototype.apply = Ext.Template.prototype.applyTemplate;
// backwards compat
Ext.DomHelper.Template = Ext.Template;
/**
* Creates a template from the passed element's value (<i>display:none</i> textarea, preferred) or innerHTML.
* @param {String/HTMLElement} el A DOM element or its id
* @param {Object} config A configuration object
* @return {Ext.Template} The created template
* @static
*/
Ext.Template.from = function(el, config){
el = Ext.getDom(el);
return new Ext.Template(el.value || el.innerHTML, config || '');
};