mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-06 10:06:19 +00:00
143 lines
3.6 KiB
JavaScript
143 lines
3.6 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/data.js
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type: application/javascript
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module-type: widget
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Widget to represent a single item of data
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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 DataWidget = function(parseTreeNode,options) {
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this.dataWidgetTag = parseTreeNode.type;
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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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DataWidget.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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DataWidget.prototype.render = function(parent,nextSibling) {
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this.parentDomNode = parent;
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this.computeAttributes();
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this.execute();
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this.renderChildren(parent,nextSibling);
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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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DataWidget.prototype.execute = function() {
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// Construct the child widgets
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this.makeChildWidgets();
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};
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/*
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Read the tiddler value(s) from a data widget – must be called after the .render() method
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*/
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DataWidget.prototype.readDataTiddlerValues = function() {
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var self = this;
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// Start with a blank object
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var item = Object.create(null);
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// Read any attributes not prefixed with $
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$tw.utils.each(this.attributes,function(value,name) {
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if(name.charAt(0) !== "$") {
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item[name] = value;
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}
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});
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item = new $tw.Tiddler(item);
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// Deal with $tiddler, $filter or $compound-tiddler attributes
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var tiddlers = [],title;
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if(this.hasAttribute("$tiddler")) {
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title = this.getAttribute("$tiddler");
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if(title) {
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var tiddler = this.wiki.getTiddler(title);
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if(tiddler) {
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tiddlers.push(tiddler);
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}
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}
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}
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if(this.hasAttribute("$filter")) {
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var filter = this.getAttribute("$filter");
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if(filter) {
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var titles = this.wiki.filterTiddlers(filter);
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$tw.utils.each(titles,function(title) {
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var tiddler = self.wiki.getTiddler(title);
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tiddlers.push(tiddler);
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});
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}
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}
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if(this.hasAttribute("$compound-tiddler")) {
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title = this.getAttribute("$compound-tiddler");
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if(title) {
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tiddlers.push.apply(tiddlers,this.extractCompoundTiddler(title));
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}
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}
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// Convert the literal item to field strings
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item = item.getFieldStrings();
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if(tiddlers.length === 0) {
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if(Object.keys(item).length > 0 && !!item.title) {
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return [item];
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} else {
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return [];
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}
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} else {
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var results = [];
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$tw.utils.each(tiddlers,function(tiddler,index) {
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var fields = tiddler.getFieldStrings();
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results.push($tw.utils.extend({},fields,item));
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});
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return results;
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}
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};
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/*
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Helper to extract tiddlers from text/vnd.tiddlywiki-multiple tiddlers
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*/
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DataWidget.prototype.extractCompoundTiddler = function(title) {
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var tiddler = this.wiki.getTiddler(title);
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if(tiddler && tiddler.fields.type === "text/vnd.tiddlywiki-multiple") {
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var text = tiddler.fields.text || "",
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rawTiddlers = text.split(/\r?\n\+\r?\n/),
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tiddlers = [];
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$tw.utils.each(rawTiddlers,function(rawTiddler) {
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var fields = Object.create(null),
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split = rawTiddler.split(/\r?\n\r?\n/mg);
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if(split.length >= 1) {
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fields = $tw.utils.parseFields(split[0],fields);
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}
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if(split.length >= 2) {
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fields.text = split.slice(1).join("\n\n");
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}
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tiddlers.push(new $tw.Tiddler(fields));
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});
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return tiddlers;
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} else {
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return [];
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}
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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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DataWidget.prototype.refresh = function(changedTiddlers) {
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// Refresh our attributes
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var changedAttributes = this.computeAttributes();
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// Refresh our children, and indicate that we refreshed if any of our attribute values have changed
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return this.refreshChildren(changedTiddlers) || $tw.utils.count(changedAttributes) > 0;
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};
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exports.data = DataWidget;
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})();
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