97 lines
2.5 KiB
JavaScript
97 lines
2.5 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/parameters.js
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type: application/javascript
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module-type: widget
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Widget for definition of transclusion parameters
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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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TranscludeWidget = require("$:/core/modules/widgets/transclude.js").transclude;
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var ParametersWidget = function(parseTreeNode,options) {
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// Initialise
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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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ParametersWidget.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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ParametersWidget.prototype.render = function(parent,nextSibling) {
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// Call the constructor
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Widget.call(this);
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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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ParametersWidget.prototype.execute = function() {
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var self = this;
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this.parametersDepth = Math.max(parseInt(this.getAttribute("$depth","1"),10) || 1,1);
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// Find the parent transclusions
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var pointer = this.parentWidget,
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depth = this.parametersDepth;
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while(pointer) {
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if(pointer instanceof TranscludeWidget) {
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depth--;
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if(depth <= 0) {
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break;
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}
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}
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pointer = pointer.parentWidget;
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}
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// Process each parameter
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if(pointer instanceof TranscludeWidget) {
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// Get the value for each defined parameter
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$tw.utils.each($tw.utils.getOrderedAttributesFromParseTreeNode(self.parseTreeNode),function(attr,index) {
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var name = attr.name;
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// If the attribute name starts with $$ then reduce to a single dollar
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if(name.substr(0,2) === "$$") {
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name = name.substr(1);
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}
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var value = pointer.getTransclusionParameter(name,index,self.getAttribute(attr.name,""));
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self.setVariable(name,value);
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});
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// Assign any metaparameters
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$tw.utils.each(pointer.getTransclusionMetaParameters(),function(getValue,name) {
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var variableName = self.getAttribute("$" + name);
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if(variableName) {
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self.setVariable(variableName,getValue(name));
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}
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});
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}
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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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Refresh the widget by ensuring our attributes are up to date
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*/
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ParametersWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if(Object.keys(changedAttributes).length) {
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this.refreshSelf();
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return true;
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}
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return this.refreshChildren(changedTiddlers);
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};
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exports.parameters = ParametersWidget;
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})();
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