mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-05 01:26:18 +00:00
89 lines
2.3 KiB
JavaScript
89 lines
2.3 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/jsontiddler.js
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type: application/javascript
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module-type: widget
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Render a tiddler as JSON text
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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 JSONTiddlerWidget = 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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JSONTiddlerWidget.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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JSONTiddlerWidget.prototype.render = function(parent,nextSibling) {
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var self = this;
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this.parentDomNode = parent;
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this.computeAttributes();
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this.execute();
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// Collect the fields from the optional base tiddler
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var fields = this.getTiddlerFields();
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// Add custom fields specified in attributes starting with $
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$tw.utils.each(this.attributes,function(attribute,name) {
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if(name.charAt(0) === "$") {
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fields[name.slice(1)] = attribute;
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}
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});
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// JSONify
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var json = JSON.stringify(fields);
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// Escape unsafe script characters
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if(this.attEscapeUnsafeScriptChars) {
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json = json.replace(/</g,"\\u003C");
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}
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// Update the DOM
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var textNode = this.document.createTextNode(json);
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parent.insertBefore(textNode,nextSibling);
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this.domNodes.push(textNode);
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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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JSONTiddlerWidget.prototype.execute = function() {
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this.attTiddler = this.getAttribute("tiddler");
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this.attExclude = this.getAttribute("exclude","");
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this.attEscapeUnsafeScriptChars = this.getAttribute("escapeUnsafeScriptChars","no") === "yes";
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};
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/*
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Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
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*/
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JSONTiddlerWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if($tw.utils.count(changedAttributes) > 0 || (this.attTiddler && changedTiddlers[this.attTiddler])) {
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this.refreshSelf();
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return true;
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} else {
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return false;
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}
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};
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JSONTiddlerWidget.prototype.getTiddlerFields = function() {
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var fields = {};
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if(this.attTiddler) {
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var tiddler = this.wiki.getTiddler(this.attTiddler);
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if(tiddler) {
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fields = tiddler.getFieldStrings({exclude: this.attExclude.split(" ")});
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}
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}
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return fields;
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};
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exports.jsontiddler = JSONTiddlerWidget;
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})(); |