source: Dev/trunk/src/client/dijit/Declaration.js

define([
        "dojo/_base/array", // array.forEach array.map
        "dojo/aspect",  // aspect.after
        "dojo/_base/declare", // declare
        "dojo/_base/lang", // lang.getObject
        "dojo/parser", // parser._functionFromScript
        "dojo/query", // query
        "./_Widget",
        "./_TemplatedMixin",
        "./_WidgetsInTemplateMixin",
        "dojo/NodeList-dom"
], function(array, aspect, declare, lang, parser, query, _Widget, _TemplatedMixin, _WidgetsInTemplateMixin){

        // module:
        //              dijit/Declaration

        return declare("dijit.Declaration", _Widget, {
                // summary:
                //              The Declaration widget allows a developer to declare new widget
                //              classes directly from a snippet of markup.

                // _noScript: [private] Boolean
                //              Flag to parser to leave alone the script tags contained inside of me
                _noScript: true,

                // stopParser: [private] Boolean
                //              Flag to parser to not try and parse widgets declared inside of me
                stopParser: true,

                // widgetClass: [const] String
                //              Name of class being declared, ex: "acme.myWidget"
                widgetClass: "",

                // propList: [const] Object
                //              Set of attributes for this widget along with default values, ex:
                //              {delay: 100, title: "hello world"}
                defaults: null,

                // mixins: [const] String[]
                //              List containing the prototype for this widget, and also any mixins,
                //              ex: ["dijit._Widget", "dijit._Container"]
                mixins: [],

                buildRendering: function(){
                        var src = this.srcNodeRef.parentNode.removeChild(this.srcNodeRef),
                                methods = query("> script[type='dojo/method']", src).orphan(),
                                connects = query("> script[type='dojo/connect']", src).orphan(), // remove for 2.0
                                aspects = query("> script[type='dojo/aspect']", src).orphan(),
                                srcType = src.nodeName;

                        var propList = this.defaults || {};

                        // For all methods defined like <script type="dojo/method" data-dojo-event="foo">,
                        // add that method to prototype.
                        // If there's no "event" specified then it's code to run on instantiation,
                        // so it becomes a connection to "postscript" (handled below).
                        array.forEach(methods, function(s){
                                var evt = s.getAttribute("event") || s.getAttribute("data-dojo-event"), // remove "event" for 2.0
                                        func = parser._functionFromScript(s, "data-dojo-");
                                if(evt){
                                        propList[evt] = func;
                                }else{
                                        aspects.push(s);
                                }
                        });

                        // map array of strings like [ "dijit.form.Button" ] to array of mixin objects
                        // (note that array.map(this.mixins, lang.getObject) doesn't work because it passes
                        // a bogus third argument to getObject(), confusing it)
                        if(this.mixins.length){
                                this.mixins = array.map(this.mixins, function(name){ return lang.getObject(name); } );
                        }else{
                                this.mixins = [ _Widget, _TemplatedMixin, _WidgetsInTemplateMixin ];
                        }

                        propList._skipNodeCache = true;
                        propList.templateString =
                                "<"+srcType+" class='"+src.className+"'" +
                                " data-dojo-attach-point='"+
                                        (src.getAttribute("data-dojo-attach-point") || src.getAttribute("dojoAttachPoint") || '')+
                                "' data-dojo-attach-event='"+
                                        (src.getAttribute("data-dojo-attach-event") || src.getAttribute("dojoAttachEvent") || '')+
                                "' >"+src.innerHTML.replace(/\%7B/g,"{").replace(/\%7D/g,"}")+"</"+srcType+">";

                        // create the new widget class
                        var wc = declare(
                                this.widgetClass,
                                this.mixins,
                                propList
                        );

                        // Handle <script> blocks of form:
                        //              <script type="dojo/aspect" data-dojo-advice="after" data-dojo-method="foo">
                        // and
                        //              <script type="dojo/method">
                        // (Note that the second one is just shorthand for a dojo/aspect to postscript)
                        // Since this is a connect in the declaration, we are actually connection to the method
                        // in the _prototype_.
                        array.forEach(aspects, function(s){
                                var advice = s.getAttribute("data-dojo-advice") || "after",
                                        method = s.getAttribute("data-dojo-method") || "postscript",
                                        func = parser._functionFromScript(s);
                                aspect.after(wc.prototype, method, func, true);
                        });

                        // Handle legacy <script type="dojo/connect" data-dojo-event="foo">.
                        // Remove for 2.0.
                        array.forEach(connects, function(s){
                                var evt = s.getAttribute("event") || s.getAttribute("data-dojo-event"),
                                        func = parser._functionFromScript(s);
                                aspect.after(wc.prototype, evt, func, true);
                        });
                }
        });
});