mirror of
https://github.com/Jermolene/TiddlyWiki5
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60 lines
1.6 KiB
JavaScript
60 lines
1.6 KiB
JavaScript
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/*\
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title: $:/core/modules/widgets/count.js
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type: application/javascript
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module-type: widget
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Implements the count widget that displays the number of tiddlers that match a filter
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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 CountWidget = function(renderer) {
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// Save state
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this.renderer = renderer;
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// Execute the filter to get the initial count
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this.executeFilter();
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// Generate child nodes
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this.generate();
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};
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CountWidget.prototype.executeFilter = function() {
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// Get attributes
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this.filter = this.renderer.getAttribute("filter");
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// Execute the filter
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if(this.filter) {
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this.currentCount = this.renderer.renderTree.wiki.filterTiddlers(this.filter,this.renderer.tiddlerTitle).length;
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} else {
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this.currentCount = undefined;
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}
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};
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CountWidget.prototype.generate = function() {
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// Set the element
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this.tag = "span";
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this.attributes = {};
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this.children = this.renderer.renderTree.createRenderers(this.renderer,[
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{type: "text", text: this.currentCount !== undefined ? this.currentCount.toString() : ""}
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]);
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};
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CountWidget.prototype.refreshInDom = function(changedAttributes,changedTiddlers) {
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// Re-execute the filter to get the count
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var oldCount = this.currentCount;
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this.executeFilter();
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if(this.currentCount !== oldCount) {
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// Regenerate and rerender the widget and replace the existing DOM node
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this.generate();
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var oldDomNode = this.renderer.domNode,
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newDomNode = this.renderer.renderInDom();
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oldDomNode.parentNode.replaceChild(newDomNode,oldDomNode);
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}
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};
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exports.count = CountWidget;
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})();
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