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TiddlyWiki5/core/modules/widgets/vars.js
Simon Huber 4858b24cfe
Fix #5308 - WidgetSubclassingMechanism not working with widgets that add EventListeners (or logic ?) in constructor (#5382)
* add EventListeners in the render() method instead of the constructor

* scrollable widget: add EventListeners in render() method instead of constructor +

... move logic from constructor to render()

* linkcatcher: add EventListeners in render() instead of constructor

* fieldmangler: add EventListeners in render() instead of constructor

* edit-bitmap: initialise editorOperations in render() instead of constructor

* list-widget: initialise storyviews in render() instead of constructor

* vars widget: execute Widget.call(this) in render() instead of constructor

... not shure what this should do

* Update fieldmangler.js

* Update edit-bitmap.js

* Update linkcatcher.js

* Update navigator.js

* Update scrollable.js

* Update list.js

* Update vars.js
2021-01-09 13:25:48 +00:00

76 lines
1.6 KiB
JavaScript

/*\
title: $:/core/modules/widgets/vars.js
type: application/javascript
module-type: widget
This widget allows multiple variables to be set in one go:
```
\define helloworld() Hello world!
<$vars greeting="Hi" me={{!!title}} sentence=<<helloworld>>>
<<greeting>>! I am <<me>> and I say: <<sentence>>
</$vars>
```
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var Widget = require("$:/core/modules/widgets/widget.js").widget;
var VarsWidget = function(parseTreeNode,options) {
// Initialise
this.initialise(parseTreeNode,options);
};
/*
Inherit from the base widget class
*/
VarsWidget.prototype = Object.create(Widget.prototype);
/*
Render this widget into the DOM
*/
VarsWidget.prototype.render = function(parent,nextSibling) {
// Call the constructor
Widget.call(this);
this.parentDomNode = parent;
this.computeAttributes();
this.execute();
this.renderChildren(parent,nextSibling);
};
/*
Compute the internal state of the widget
*/
VarsWidget.prototype.execute = function() {
// Parse variables
var self = this;
$tw.utils.each(this.attributes,function(val,key) {
if(key.charAt(0) !== "$") {
self.setVariable(key,val);
}
});
// Construct the child widgets
this.makeChildWidgets();
};
/*
Refresh the widget by ensuring our attributes are up to date
*/
VarsWidget.prototype.refresh = function(changedTiddlers) {
var changedAttributes = this.computeAttributes();
if(Object.keys(changedAttributes).length) {
this.refreshSelf();
return true;
}
return this.refreshChildren(changedTiddlers);
};
exports["vars"] = VarsWidget;
})();