Restore encrypted TiddlyWiki support

core/modules/widgets/encrypt.js

@@ -0,0 +1,51 @@
+/*\
+title: $:/core/modules/widget/encrypt.js
+type: application/javascript
+module-type: widget
+
+Implements the encrypt widget.
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+var EncryptWidget = function(renderer) {
+	// Save state
+	this.renderer = renderer;
+	// Generate child nodes
+	this.generate();
+};
+
+EncryptWidget.prototype.generate = function() {
+	// Get the parameters from the attributes
+	this.filter = this.renderer.getAttribute("filter");
+	// Check whether we've got an encryption password
+	var isEncrypted = $tw.crypto.hasPassword();
+	// Encrypt the filtered tiddlers
+	var tiddlers = this.renderer.renderTree.wiki.filterTiddlers(this.filter),
+		json = {},
+		self = this;
+	$tw.utils.each(tiddlers,function(title) {
+		var tiddler = self.renderer.renderTree.wiki.getTiddler(title),
+			jsonTiddler = {};
+		for(var f in tiddler.fields) {
+			jsonTiddler[f] = tiddler.getFieldString(f);
+		}
+		json[title] = jsonTiddler;
+	});
+	var encryptedText = $tw.utils.htmlEncode($tw.crypto.encrypt(JSON.stringify(json)));
+	// Set the return element
+	this.tag = "pre";
+	this.attributes ={"class": "tw-encrypt"};
+	this.children = this.renderer.renderTree.createRenderers(this.renderer.renderContext,[{
+		type: "text",
+		text: encryptedText
+	}]);
+};
+
+exports.encrypt = EncryptWidget;
+
+})();