mirror of
https://github.com/Jermolene/TiddlyWiki5
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114 lines
3.2 KiB
JavaScript
Executable File
114 lines
3.2 KiB
JavaScript
Executable File
/*\
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title: $:/core/modules/widgets/transclude.js
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type: application/javascript
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module-type: widget
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Transclude 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 TranscludeWidget = 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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TranscludeWidget.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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TranscludeWidget.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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TranscludeWidget.prototype.execute = function() {
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// Get our parameters
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this.transcludeTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
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this.transcludeSubTiddler = this.getAttribute("subtiddler");
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this.transcludeField = this.getAttribute("field");
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this.transcludeIndex = this.getAttribute("index");
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this.transcludeMode = this.getAttribute("mode");
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// Parse the text reference
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var parseAsInline = !this.parseTreeNode.isBlock;
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if(this.transcludeMode === "inline") {
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parseAsInline = true;
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} else if(this.transcludeMode === "block") {
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parseAsInline = false;
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}
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var parser = this.wiki.parseTextReference(
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this.transcludeTitle,
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this.transcludeField,
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this.transcludeIndex,
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{
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parseAsInline: parseAsInline,
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subTiddler: this.transcludeSubTiddler
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}),
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parseTreeNodes = parser ? parser.tree : this.parseTreeNode.children;
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// Set context variables for recursion detection
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var recursionMarker = this.makeRecursionMarker();
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this.setVariable("transclusion",recursionMarker);
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// Check for recursion
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if(parser) {
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if(this.parentWidget && this.parentWidget.hasVariable("transclusion",recursionMarker)) {
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parseTreeNodes = [{type: "element", tag: "span", attributes: {
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"class": {type: "string", value: "tc-error"}
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}, children: [
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{type: "text", text: $tw.language.getString("Error/RecursiveTransclusion")}
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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(parseTreeNodes);
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};
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/*
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Compose a string comprising the title, field and/or index to identify this transclusion for recursion detection
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*/
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TranscludeWidget.prototype.makeRecursionMarker = function() {
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var output = [];
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output.push("{");
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output.push(this.getVariable("currentTiddler",{defaultValue: ""}));
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output.push("|");
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output.push(this.transcludeTitle || "");
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output.push("|");
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output.push(this.transcludeField || "");
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output.push("|");
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output.push(this.transcludeIndex || "");
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output.push("|");
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output.push(this.transcludeSubTiddler || "");
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output.push("}");
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return output.join("");
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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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TranscludeWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if(changedAttributes.tiddler || changedAttributes.field || changedAttributes.index || changedTiddlers[this.transcludeTitle]) {
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this.refreshSelf();
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return true;
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} else {
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return this.refreshChildren(changedTiddlers);
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}
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};
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exports.transclude = TranscludeWidget;
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})();
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