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Add fieldmangler widget that allows fields to be added and removed to tiddlers

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Jeremy Ruston 2013-06-04 12:02:37 +01:00
parent ab75dde048
commit 348a6976b7
1 changed files with 60 additions and 0 deletions
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core/modules/widgets/fieldmangler.js Normal file
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/*\
title: $:/core/modules/widgets/fieldmangler.js
type: application/javascript
module-type: widget
The fieldmangler widget modifies the fields of the current tiddler in response to messages.
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var FieldManglerWidget = function(renderer) {
// Save state
this.renderer = renderer;
// Generate child nodes
this.generate();
};
FieldManglerWidget.prototype.generate = function() {
var self = this;
// Get parameters from our attributes
this.tiddlerTitle = this.renderer.getAttribute("tiddler",this.renderer.tiddlerTitle);
// Set the element
this.tag = "div";
this.attributes = {
"class": "tw-fieldmangler"
};
// Set event handlers
this.events = [
{name: "tw-remove-field", handlerObject: this, handlerMethod: "handleRemoveFieldEvent"},
{name: "tw-add-field", handlerObject: this, handlerMethod: "handleAddFieldEvent"}
];
// Render the children
this.children = this.renderer.renderTree.createRenderers(this.renderer,this.renderer.parseTreeNode.children);
};
FieldManglerWidget.prototype.handleRemoveFieldEvent = function(event) {
var tiddler = this.renderer.renderTree.wiki.getTiddler(this.tiddlerTitle),
deletion = {};
deletion[event.currentField] = undefined;
this.renderer.renderTree.wiki.addTiddler(new $tw.Tiddler(tiddler,deletion));
return true;
};
FieldManglerWidget.prototype.handleAddFieldEvent = function(event) {
var tiddler = this.renderer.renderTree.wiki.getTiddler(this.tiddlerTitle);
if(typeof event.param === "string" && event.param !== "" && !$tw.utils.hop(tiddler.fields,event.param)) {
var addition = {};
addition[event.param] = "";
this.renderer.renderTree.wiki.addTiddler(new $tw.Tiddler(tiddler,addition));
}
return true;
};
exports.fieldmangler = FieldManglerWidget;
})();