I managed to modify the set widget to fix the problem described here.
While I don't understand the system enough to guarantee this code is bug
free, it doesn't break the wiki and seems to work with all my test-cases.
(I don't really know how to go about submitting this to the project...)
To use this modification, replace the content of
*$:/core/modules/widgets/set.js* with the code below:
/*\
title: $:/core/modules/widgets/set.js
type: application/javascript
module-type: widget
Set variable widget
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var Widget = require("$:/core/modules/widgets/widget.js").widget;
var SetWidget = function(parseTreeNode,options) {
this.initialise(parseTreeNode,options);
};
/*
Inherit from the base widget class
*/
SetWidget.prototype = new Widget();
/*
Render this widget into the DOM
*/
SetWidget.prototype.render = function(parent,nextSibling) {
this.parentDomNode = parent;
this.computeAttributes();
this.execute();
this.renderChildren(parent,nextSibling);
};
/*
Compute the internal state of the widget
*/
SetWidget.prototype.execute = function() {
// Get our parameters
this.setName = this.getAttribute("name","currentTiddler");
this.setFilter = this.getAttribute("filter");
this.setValue = this.getAttribute("value");
this.setEmptyValue = this.getAttribute("emptyValue");
// Set context variable
this.setVariable(this.setName,this.getValue(),this.parseTreeNode.params);
// Construct the child widgets
this.makeChildWidgets();
};
/*
Get the value to be assigned
*/
SetWidget.prototype.getValue = function() {
var value = this.setValue;
if(this.setFilter) {
var results = this.wiki.filterTiddlers(this.setFilter,this);
if(!this.setValue) {
value = $tw.utils.stringifyList(results);
}
if(results.length === 0 && this.setEmptyValue !== undefined) {
value = this.setEmptyValue;
}
}
return value;
};
/*
Selectively refreshes the widget if needed. Returns true if the widget or any
of its children needed re-rendering
*/
SetWidget.prototype.refresh = function(changedTiddlers) {
var changedAttributes = this.computeAttributes();
if(changedAttributes.name || changedAttributes.filter ||
changedAttributes.value || changedAttributes.emptyValue
|| (this.setFilter && this.getValue() !=
this.variables[this.setName].value)) {
this.refreshSelf();
return true;
} else {
return this.refreshChildren(changedTiddlers);
}
};
exports.setvariable = SetWidget;
exports.set = SetWidget;
})();
On Friday, 18 September 2015 13:15:41 UTC-5, Evan Balster wrote:
>
> Note that the issue with <$set> not refreshing occurs regardless of
> whether a value/emptyValue condition is used.
>
> On Friday, 18 September 2015 10:00:44 UTC-5, Tobias Beer wrote:
>>
>> Despite the limitations, I have added the example here...
>>
>> Conditional Variable Assignment @ tb5
>> <http://tobibeer.github.io/tb5/#Conditional%20Variable%20Assignment>
>>
>> Best wishes,
>>
>> — tb
>>
>
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