90 lines
2.3 KiB
JavaScript
90 lines
2.3 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/action-deletefield.js
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type: application/javascript
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module-type: widget
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Action widget to delete fields of a tiddler.
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Widget = require("$:/core/modules/widgets/widget.js").widget;
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var DeleteFieldWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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/*
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Inherit from the base widget class
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*/
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DeleteFieldWidget.prototype = new Widget();
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/*
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Render this widget into the DOM
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*/
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DeleteFieldWidget.prototype.render = function(parent,nextSibling) {
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this.computeAttributes();
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this.execute();
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};
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/*
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Compute the internal state of the widget
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*/
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DeleteFieldWidget.prototype.execute = function() {
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this.actionTiddler = this.getAttribute("$tiddler",this.getVariable("currentTiddler"));
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this.actionField = this.getAttribute("$field",null);
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this.actionTimestamp = this.getAttribute("$timestamp","yes") === "yes";
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};
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/*
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Refresh the widget by ensuring our attributes are up to date
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*/
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DeleteFieldWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if(changedAttributes["$tiddler"]) {
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this.refreshSelf();
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return true;
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}
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return this.refreshChildren(changedTiddlers);
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};
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/*
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Invoke the action associated with this widget
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*/
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DeleteFieldWidget.prototype.invokeAction = function(triggeringWidget,event) {
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var self = this,
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tiddler = this.wiki.getTiddler(self.actionTiddler),
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removeFields = {},
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hasChanged = false;
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if((this.actionField !== null) && tiddler) {
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removeFields[this.actionField] = undefined;
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if(this.actionField in tiddler.fields) {
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hasChanged = true;
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}
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}
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if(tiddler) {
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$tw.utils.each(this.attributes,function(attribute,name) {
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if(name.charAt(0) !== "$" && name !== "title") {
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removeFields[name] = undefined;
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if(name in tiddler.fields) {
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hasChanged = true;
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}
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}
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});
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if(hasChanged) {
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var creationFields = this.actionTimestamp ? this.wiki.getCreationFields() : {};
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var modificationFields = this.actionTimestamp ? this.wiki.getModificationFields() : {};
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this.wiki.addTiddler(new $tw.Tiddler(creationFields,tiddler,removeFields,modificationFields));
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}
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}
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return true; // Action was invoked
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};
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exports["action-deletefield"] = DeleteFieldWidget;
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})();
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