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_WidgetsInTemplateMixin.js
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_WidgetsInTemplateMixin.js
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define([
"dojo/_base/array", // forEach()
"dojo/aspect", // after()
"dojo/_base/declare", // declare()
"dojo/_base/lang", // hitch()
"dojo/parser" // parse()
], function(array, aspect, declare, lang, parser){
// module:
// dijit/_WidgetsInTemplateMixin
return declare("dijit._WidgetsInTemplateMixin", null, {
// summary:
// Mixin to supplement _TemplatedMixin when template contains widgets
// _earlyTemplatedStartup: Boolean
// A fallback to preserve the 1.0 - 1.3 behavior of children in
// templates having their startup called before the parent widget
// fires postCreate. Defaults to 'false', causing child widgets to
// have their .startup() called immediately before a parent widget
// .startup(), but always after the parent .postCreate(). Set to
// 'true' to re-enable to previous, arguably broken, behavior.
_earlyTemplatedStartup: false,
// widgetsInTemplate: [protected] Boolean
// Should we parse the template to find widgets that might be
// declared in markup inside it? (Remove for 2.0 and assume true)
widgetsInTemplate: true,
// contextRequire: Function
// Used to provide a context require to the dojo/parser in order to be
// able to use relative MIDs (e.g. `./Widget`) in the widget's template.
contextRequire: null,
_beforeFillContent: function(){
if(this.widgetsInTemplate){
// Before copying over content, instantiate widgets in template
var node = this.domNode;
if(this.containerNode && !this.searchContainerNode){
// Tell parse call below not to look for widgets inside of this.containerNode
this.containerNode.stopParser = true;
}
parser.parse(node, {
noStart: !this._earlyTemplatedStartup,
template: true,
inherited: {dir: this.dir, lang: this.lang, textDir: this.textDir},
propsThis: this, // so data-dojo-props of widgets in the template can reference "this" to refer to me
contextRequire: this.contextRequire,
scope: "dojo" // even in multi-version mode templates use dojoType/data-dojo-type
}).then(lang.hitch(this, function(widgets){
this._startupWidgets = widgets;
// _WidgetBase::destroy() will destroy any supporting widgets under this.domNode.
// If we wanted to, we could call this.own() on anything in this._startupWidgets that was moved outside
// of this.domNode (like Dialog, which is moved to <body>).
// Hook up attach points and events for nodes that were converted to widgets
for(var i = 0; i < widgets.length; i++){
this._processTemplateNode(widgets[i], function(n,p){
// callback to get a property of a widget
return n[p];
}, function(widget, type, callback){
// callback to do data-dojo-attach-event to a widget
if(type in widget){
// back-compat, remove for 2.0
return widget.connect(widget, type, callback);
}else{
// 1.x may never hit this branch, but it's the default for 2.0
return widget.on(type, callback, true);
}
});
}
// Cleanup flag set above, just in case
if(this.containerNode && this.containerNode.stopParser){
delete this.containerNode.stopParser;
}
}));
if(!this._startupWidgets){
throw new Error(this.declaredClass + ": parser returned unfilled promise (probably waiting for module auto-load), " +
"unsupported by _WidgetsInTemplateMixin. Must pre-load all supporting widgets before instantiation.");
}
}
},
_processTemplateNode: function(/*DOMNode|Widget*/ baseNode, getAttrFunc, attachFunc){
// Override _AttachMixin._processNode to skip DOMNodes with data-dojo-type set. They are handled separately
// in the _beforeFillContent() code above.
if(getAttrFunc(baseNode, "dojoType") || getAttrFunc(baseNode, "data-dojo-type")){
return true;
}
return this.inherited(arguments);
},
startup: function(){
array.forEach(this._startupWidgets, function(w){
if(w && !w._started && w.startup){
w.startup();
}
});
this._startupWidgets = null;
this.inherited(arguments);
}
});
});