kopia lustrzana https://github.com/miklobit/TiddlyWiki5
73 wiersze
1.6 KiB
JavaScript
73 wiersze
1.6 KiB
JavaScript
/*\
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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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Count widget
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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 CountWidget = 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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CountWidget.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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CountWidget.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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var textNode = this.document.createTextNode(this.currentCount);
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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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CountWidget.prototype.execute = function() {
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// Get parameters from our attributes
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this.filter = this.getAttribute("filter");
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// Execute the filter
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if(this.filter) {
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this.currentCount = this.wiki.filterTiddlers(this.filter,this).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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/*
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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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CountWidget.prototype.refresh = function(changedTiddlers) {
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// Re-execute the filter to get the count
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this.computeAttributes();
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var oldCount = this.currentCount;
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this.execute();
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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.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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exports.count = CountWidget;
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})();
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