mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-12-25 01:20:30 +00:00
3a3754aebb
Background: https://medium.com/@jitbit/target-blank-the-most-underestimated-vulnerab ility-ever-96e328301f4c#.hduwdbjlb
147 lines
4.3 KiB
JavaScript
147 lines
4.3 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/railroad/wrapper.js
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type: application/javascript
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module-type: widget
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Wrapper for `railroad-diagrams.js` that provides a `<$railroad>` widget.
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Parser = require("$:/plugins/tiddlywiki/railroad/parser.js").parser,
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Widget = require("$:/core/modules/widgets/widget.js").widget;
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var RailroadWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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var RAILROAD_OPTIONS = "$:/config/railroad";
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/*
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Inherit from the base widget class
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*/
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RailroadWidget.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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RailroadWidget.prototype.render = function(parent,nextSibling) {
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// Housekeeping
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this.parentDomNode = parent;
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this.computeAttributes();
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this.execute();
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// Get the source text
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var source = this.getAttribute("text",this.parseTreeNode.text || "");
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// Create a div to contain the SVG or error message
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var div = this.document.createElement("div");
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try {
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// Initialise options from the config tiddler or widget attributes
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var config = $tw.wiki.getTiddlerData(RAILROAD_OPTIONS,{});
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var options = {
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arrow: this.getAttribute("arrow", config.arrow || "yes") === "yes",
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debug: this.getAttribute("debug", config.debug || "no") === "yes",
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start: this.getAttribute("start", config.start || "single"),
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end: this.getAttribute("end", config.end || "single")
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};
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// Parse the source
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var parser = new Parser(this,source,options);
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// Generate content into the div
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if(parser.options.debug) {
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this.renderDebug(parser,div);
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} else {
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this.renderSvg(parser,div);
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}
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} catch(ex) {
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div.className = "tc-error";
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div.textContent = ex;
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}
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// Insert the div into the DOM
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parent.insertBefore(div,nextSibling);
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this.domNodes.push(div);
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};
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RailroadWidget.prototype.renderDebug = function(parser,div) {
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var output = ["<pre>"];
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parser.root.debug(output, "");
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output.push("</pre>");
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div.innerHTML = output.join("");
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};
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RailroadWidget.prototype.renderSvg = function(parser,div) {
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// Generate a model of the diagram
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var fakeSvg = parser.root.toSvg(parser.options);
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// Render the model into a tree of SVG DOM nodes
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var svg = fakeSvg.toSVG();
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// Fill in the remaining attributes of any link nodes
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this.patchLinks(svg);
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// Insert the SVG tree into the div
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div.appendChild(svg);
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};
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RailroadWidget.prototype.patchLinks = function(node) {
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var self = this;
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if(!$tw.node && node.hasChildNodes()) {
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var children = node.childNodes;
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for(var i=0; i<children.length; i++) {
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var child = children[i];
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var attributes = child.attributes;
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if(attributes) {
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// Find each element that has a data-tw-target attribute
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var target = child.attributes["data-tw-target"];
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if(target !== undefined) {
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target = target.value;
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if(child.attributes["data-tw-external"]) {
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// External links are straightforward
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child.setAttribute("target","_blank");
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child.setAttribute("rel","noopener noreferrer");
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} else {
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// Each internal link gets its own onclick handler, capturing its own copy of target
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(function(myTarget) {
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child.onclick = function(event) {
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self.dispatchLink(myTarget,event);
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return false;
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}
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})(target);
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target = "#" + target;
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}
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child.setAttributeNS("http://www.w3.org/1999/xlink","href",target);
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}
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}
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this.patchLinks(child);
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}
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}
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};
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RailroadWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if(changedAttributes.text || changedTiddlers[RAILROAD_OPTIONS]) {
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this.refreshSelf();
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return true;
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}
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return false;
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};
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RailroadWidget.prototype.dispatchLink = function(to,event) {
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// Send the click on its way as a navigate event
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var bounds = this.domNodes[0].getBoundingClientRect();
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this.dispatchEvent({
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type: "tm-navigate",
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navigateTo: to,
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navigateFromTitle: this.getVariable("storyTiddler"),
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navigateFromNode: this,
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navigateFromClientRect: { top: bounds.top, left: bounds.left, width: bounds.width, right: bounds.right, bottom: bounds.bottom, height: bounds.height
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},
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navigateSuppressNavigation: event.metaKey || event.ctrlKey || (event.button === 1)
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});
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event.preventDefault();
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event.stopPropagation();
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return false;
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};
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exports.railroad = RailroadWidget;
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})(); |