mirror of
https://github.com/Jermolene/TiddlyWiki5
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86 lines
2.1 KiB
JavaScript
Executable File
86 lines
2.1 KiB
JavaScript
Executable File
/*\
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title: $:/core/modules/new_widgets/element.js
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type: application/javascript
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module-type: new_widget
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Element 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/new_widgets/widget.js").widget;
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var ElementWidget = 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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ElementWidget.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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ElementWidget.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 domNode = this.document.createElementNS(this.namespace,this.parseTreeNode.tag);
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this.assignAttributes(domNode);
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parent.insertBefore(domNode,nextSibling);
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this.renderChildren(domNode,null);
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this.domNodes.push(domNode);
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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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ElementWidget.prototype.execute = function() {
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// Select the namespace for the tag
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var tagNamespaces = {
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svg: "http://www.w3.org/2000/svg",
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math: "http://www.w3.org/1998/Math/MathML"
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};
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this.namespace = tagNamespaces[this.parseTreeNode.tag];
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if(this.namespace) {
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this.setVariable("namespace",this.namespace);
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} else {
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this.namespace = this.getVariable("namespace",null,"http://www.w3.org/1999/xhtml");
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}
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// Make the child widgets
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this.makeChildWidgets();
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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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ElementWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes(),
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hasChangedAttributes = $tw.utils.count(changedAttributes) > 0;
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if(hasChangedAttributes) {
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// Update our attributes
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this.assignAttributes(this.domNodes[0]);
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}
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var hasRefreshed = this.refreshChildren(changedTiddlers);
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return hasRefreshed || hasChangedAttributes;
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};
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/*
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Remove any DOM nodes created by this widget or its children
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*/
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ElementWidget.prototype.removeChildDomNodes = function() {
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$tw.utils.each(this.domNodes,function(domNode) {
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domNode.parentNode.removeChild(domNode);
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});
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this.domNodes = [];
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};
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exports.element = ElementWidget;
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})();
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