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TiddlyWiki5/core/modules/widgets/fields.js
Jermolene 08cfa88249 Fix problem with unsafe use of String.prototype.replace()
We were using `String.prototype.replace()` without addressing the
wrinkle that dollar signs in the replacement string have special
handling. This caused problems in situations where the replacement
string is derived from user input and contains dollar signs.

Fixes #2517
2016-08-06 14:45:33 +01:00

104 lines
2.7 KiB
JavaScript
Executable File

/*\
title: $:/core/modules/widgets/fields.js
type: application/javascript
module-type: widget
Fields widget
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var Widget = require("$:/core/modules/widgets/widget.js").widget;
var FieldsWidget = function(parseTreeNode,options) {
this.initialise(parseTreeNode,options);
};
/*
Inherit from the base widget class
*/
FieldsWidget.prototype = new Widget();
/*
Render this widget into the DOM
*/
FieldsWidget.prototype.render = function(parent,nextSibling) {
this.parentDomNode = parent;
this.computeAttributes();
this.execute();
var textNode = this.document.createTextNode(this.text);
parent.insertBefore(textNode,nextSibling);
this.domNodes.push(textNode);
};
/*
Compute the internal state of the widget
*/
FieldsWidget.prototype.execute = function() {
// Get parameters from our attributes
this.tiddlerTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
this.template = this.getAttribute("template");
this.exclude = this.getAttribute("exclude");
this.stripTitlePrefix = this.getAttribute("stripTitlePrefix","no") === "yes";
// Get the value to display
var tiddler = this.wiki.getTiddler(this.tiddlerTitle);
// Get the exclusion list
var exclude;
if(this.exclude) {
exclude = this.exclude.split(" ");
} else {
exclude = ["text"];
}
// Compose the template
var text = [];
if(this.template && tiddler) {
var fields = [];
for(var fieldName in tiddler.fields) {
if(exclude.indexOf(fieldName) === -1) {
fields.push(fieldName);
}
}
fields.sort();
for(var f=0; f<fields.length; f++) {
fieldName = fields[f];
if(exclude.indexOf(fieldName) === -1) {
var row = this.template,
value = tiddler.getFieldString(fieldName);
if(this.stripTitlePrefix && fieldName === "title") {
var reStrip = /^\{[^\}]+\}(.+)/mg,
reMatch = reStrip.exec(value);
if(reMatch) {
value = reMatch[1];
}
}
row = $tw.utils.replaceString(row,"$name$",fieldName);
row = $tw.utils.replaceString(row,"$value$",value);
row = $tw.utils.replaceString(row,"$encoded_value$",$tw.utils.htmlEncode(value));
text.push(row);
}
}
}
this.text = text.join("");
};
/*
Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
*/
FieldsWidget.prototype.refresh = function(changedTiddlers) {
var changedAttributes = this.computeAttributes();
if(changedAttributes.tiddler || changedAttributes.template || changedAttributes.exclude || changedAttributes.stripTitlePrefix || changedTiddlers[this.tiddlerTitle]) {
this.refreshSelf();
return true;
} else {
return false;
}
};
exports.fields = FieldsWidget;
})();