Version number update for 5.2.1

Fix text colour in DarkPhotos and Muted palettes

Thanks @kookma

See https://github.com/Jermolene/TiddlyWiki5/discussions/6167#discussioncomment-1768298

core/language/en-GB/ControlPanel.multids

@@ -27,10 +27,15 @@ Basics/Tiddlers/Prompt: Number of tiddlers
 Basics/Title/Prompt: Title of this ~TiddlyWiki
 Basics/Username/Prompt: Username for signing edits
 Basics/Version/Prompt: ~TiddlyWiki version
+Cascades/Caption: Cascades
+Cascades/Hint: These global rules are used to dynamically choose certain templates. The result of the cascade is the result of the first filter in the sequence that returns a result
+Cascades/TagPrompt: Filters tagged <$macrocall $name="tag" tag=<<currentTiddler>>/>
 EditorTypes/Caption: Editor Types
 EditorTypes/Editor/Caption: Editor
 EditorTypes/Hint: These tiddlers determine which editor is used to edit specific tiddler types.
 EditorTypes/Type/Caption: Type
+EditTemplateBody/Caption: Edit Template Body
+EditTemplateBody/Hint: This rule cascade is used by the default edit template to dynamically choose the template for editing the body of a tiddler.
 Info/Caption: Info
 Info/Hint: Information about this TiddlyWiki
 KeyboardShortcuts/Add/Prompt: Type shortcut here
@@ -191,6 +196,8 @@ Settings/TitleLinks/Yes/Description: Display tiddler titles as links
 Settings/MissingLinks/Caption: Wiki Links
 Settings/MissingLinks/Hint: Choose whether to link to tiddlers that do not exist yet
 Settings/MissingLinks/Description: Enable links to missing tiddlers
+StoryTiddler/Caption: Story Tiddler
+StoryTiddler/Hint: This rule cascade is used to dynamically choose the template for displaying a tiddler in the story river.
 StoryView/Caption: Story View
 StoryView/Prompt: Current view:
 Stylesheets/Caption: Stylesheets
@@ -201,6 +208,10 @@ Theme/Caption: Theme
 Theme/Prompt: Current theme:
 TiddlerFields/Caption: Tiddler Fields
 TiddlerFields/Hint: This is the full set of TiddlerFields in use in this wiki (including system tiddlers but excluding shadow tiddlers).
+TiddlerColour/Caption: Tiddler Colour
+TiddlerColour/Hint: This rules cascade is used to dynamically choose the colour for a tiddler (used for the icon and the associated tag pill).
+TiddlerIcon/Caption: Tiddler Icon
+TiddlerIcon/Hint: This rules cascade is used to dynamically choose the icon for a tiddler.
 Toolbars/Caption: Toolbars
 Toolbars/EditToolbar/Caption: Edit Toolbar
 Toolbars/EditToolbar/Hint: Choose which buttons are displayed for tiddlers in edit mode. Drag and drop to change the ordering
@@ -212,3 +223,7 @@ Toolbars/EditorToolbar/Hint: Choose which buttons are displayed in the editor to
 Toolbars/ViewToolbar/Caption: View Toolbar
 Toolbars/ViewToolbar/Hint: Choose which buttons are displayed for tiddlers in view mode. Drag and drop to change the ordering
 Tools/Download/Full/Caption: Download full wiki
+ViewTemplateBody/Caption: View Template Body
+ViewTemplateBody/Hint: This rule cascade is used by the default view template to dynamically choose the template for displaying the body of a tiddler.
+ViewTemplateTitle/Caption: View Template Title
+ViewTemplateTitle/Hint: This rule cascade is used by the default view template to dynamically choose the template for displaying the title of a tiddler.

core/language/en-GB/Help/pipe.tid

@@ -1,13 +0,0 @@
-title: $:/language/Help/pipe
-description: Pipe data to/from external processes
-
-Pipe data to/from external processes.
-
-```
---pipe <pipename> <filter> <incomingTitle> <arguments>...
-```
-
-* ''pipename'': identifies the pipe, matching the name defined in the `tiddlywiki.info` file
-* ''filter'': identifies the tiddlers to be passed to the pipe
-* ''incomingTitle'': provides a title to be applied to incoming tiddlers for the `raw-text` output format
-* ''arguments'': passed through to external task pipes, and ignored for other types of pipe

core/modules/commands/pipe.js

@@ -1,278 +0,0 @@
-/*\
-title: $:/core/modules/commands/pipe.js
-type: application/javascript
-module-type: command
-
-Command to execute an external task
-
-\*/
-(function(){
-
-/*jslint node: true, browser: true */
-/*global $tw: false */
-"use strict";
-
-exports.info = {
-	name: "pipe",
-	synchronous: false
-};
-
-var Command = function(params,commander,callback) {
-	this.params = params;
-	this.commander = commander;
-	this.callback = callback;
-};
-
-Command.prototype.execute = function() {
-	var self = this;
-	if(this.params.length < 2) {
-		return "Missing parameters";
-	}
-	var name = self.params[0], // External pipe name
-		outgoingFilter = self.params[1], // Filter of tiddlers to write to the pipe
-		incomingTitle = self.params[2],
-		args = self.params.slice(3); // Remaining arguments are passed on as tasks arguments
-	// Find the pipe information
-	var pipeInfo = ($tw.boot.wikiInfo["external-pipes"] || {})[name];
-	if(!pipeInfo) {
-		return this.callback("External pipe \"" + name + "\" not found");
-	}
-	// Create the pipe instance and process a message
-	var pipe = new Pipe({
-		name: name,
-		pipeInfo: pipeInfo,
-		outgoingFilter: outgoingFilter,
-		incomingTitle: incomingTitle,
-		args: args,
-		command: this
-	});
-	pipe.processMessage(this.callback);
-};
-
-function Pipe(options) {
-	this.name = options.name;
-	this.pipeInfo = options.pipeInfo;
-	this.outgoingFilter = options.outgoingFilter;
-	this.incomingTitle = options.incomingTitle;
-	this.args = options.args;
-	this.command = options.command;
-}
-
-Pipe.prototype.processMessage = function(callback) {
-	// Get the outgoing data
-	var data = this.composeOutgoingData(this.outgoingFilter);
-	// Connect to the pipe
-	switch(this.pipeInfo.type) {
-		case "task":
-			this.pipeExternalTask(data,callback);
-			break;
-		case "socket":
-			this.pipeSocket(data,callback);
-			break;
-		case "socket-erlang":
-			this.pipeSocketErlang(data,callback);
-			break;
-		default:
-			callback("Invalid pipe specifier '" + this.name + "': " + this.pipeInfo.type);
-			break;
-	}
-};
-
-Pipe.prototype.log = function(args) {
-	this.command.commander.log("Pipe: " + Array.prototype.slice.call(arguments,0).join(" "));
-};
-
-Pipe.prototype.pipeExternalTask = function(data,callback) {
-	var self = this,
-		spawn = require("child_process").spawn,
-		path = require("path"),
-		childProcess = spawn(path.resolve($tw.boot.wikiPath,this.pipeInfo.path),this.args,{
-			stdio: ["pipe","pipe",process.stderr],
-			shell: true,
-			env: $tw.utils.extend({},process.env,this.pipeInfo.environment)
-		});
-	// Pass the tiddlers over the outgoing stream
-	childProcess.stdin.on("error",function(err) {
-		self.log("Task stdin error",err)
-	});
-	childProcess.stdin.write(data);
-	childProcess.stdin.end();
-	// Catch the output
-	var chunks = [];
-	childProcess.stdout.on("data",function(chunk) {
-		chunks.push(chunk.toString());
-	});
-	childProcess.stdout.on("close",function() {
-		self.log("Task stdout close");
-		self.processIncomingData(chunks.join(""));
-	});
-	childProcess.stdout.on("error",function(err) {
-		self.log("Task stdout error",err)
-	});
-	// Pick up the output when the process ends
-	childProcess.on("error",function(err) {
-		self.log("Task error",err)
-	});
-	childProcess.on("exit",function(code,signal) {
-		self.log("Task exit",code,signal)
-		if(code !== 0) {
-			return callback("Error executing external task: " + code);
-		}
-		// Exit successfully
-		callback(null);
-	});
-};
-
-Pipe.prototype.pipeSocket = function(data,callback) {
-	var self = this,
-		net = require("net"),
-		socket = new net.Socket({
-			allowHalfOpen: true
-		}),
-		chunks = [];
-	socket.connect(this.pipeInfo.port,this.pipeInfo.host || 8081,function() {
-		self.log("Socket connection",this.pipeInfo.port,this.pipeInfo.host);
-		socket.write(data);
-		socket.end();
-	});
-	socket.on("error",function(e) {
-		self.log("Socket error",e)
-	});
-	socket.on("data",function(data) {
-		chunks.push(data.toString());
-	});
-	socket.on("end",function() {
-		self.processIncomingData(chunks.join(""));
-		self.log("Socket end");
-		socket.destroy();
-	});
-	// Add a "close" event handler for the client socket
-	socket.on("close",function() {
-		self.log("Socket closed");
-		return callback(null);
-	});
-	return null;
-};
-
-Pipe.prototype.pipeSocketErlang = function(data,callback) {
-	var self = this,
-		encoding = this.pipeInfo.encoding || "utf8",
-		net = require("net"),
-		socket = new net.Socket(),
-		accumulator = Buffer.alloc(0);
-	socket.connect(this.pipeInfo.port,this.pipeInfo.host || 8081,function() {
-		self.log("Socket connection",self.pipeInfo.port,self.pipeInfo.host);
-		var dataBytes = Buffer.from(data,encoding);
-		// Write 32-bit big endian message length
-		var lengthBytes = Buffer.alloc(4);
-		lengthBytes.writeUInt32BE(dataBytes.length + 1,0)
-console.log("Writing bytes",dataBytes.length + 1);
-		socket.write(lengthBytes);
-		// Write 8-bit type
-		var typeByte = Buffer.alloc(1);
-		typeByte.writeUInt8(1,0);
-		socket.write(typeByte);
-		// Write data
-		socket.write(dataBytes);
-	});
-	socket.on("error",function(e) {
-		self.log("Socket error",e)
-	});
-	socket.on("data",function(data) {
-console.log("Received data",data.length)
-		accumulator = Buffer.concat([accumulator,data]);
-		while(accumulator.length > 4) {
-			var length = accumulator.readInt32BE(0);
-			if(accumulator.length >= (length + 4)) {
-				if(length < 1) {
-					throw "ERROR: Incoming message length field is less than 1";
-				}
-				var type = accumulator.readUInt8(4),
-					dataLength = length - 1,
-					data = accumulator.toString(encoding,5,dataLength + 5);
-console.log("Got message",length,type)
-				self.processIncomingData(data);
-				accumulator = accumulator.slice(length + 4);
-socket.end();
-return callback(null);
-			} else {
-				break;
-			}
-		}
-	});
-	socket.on("end",function() {
-		self.log("Socket end");
-		socket.destroy();
-	});
-	// Add a "close" event handler for the client socket
-	socket.on("close",function() {
-		self.log("Socket closed");
-		return callback(null);
-	});
-	return null;
-};
-
-Pipe.prototype.composeOutgoingData = function(outgoingFilter) {
-	var self = this,
-		pipeInfoInput = this.pipeInfo.input || {},
-		data;
-	switch(pipeInfoInput.format || "json-raw-tiddlers") {
-		case "rendered-text":
-			var titles = self.command.commander.wiki.filterTiddlers(outgoingFilter),
-				output = [];
-			$tw.utils.each(titles,function(title) {
-				output.push(self.command.commander.wiki.renderTiddler("text/plain",title));
-			});
-			data = output.join("");
-			break;
-		case "json-rendered-text-tiddlers":
-			var titles = self.command.commander.wiki.filterTiddlers(outgoingFilter),
-				tiddlers = [];
-			$tw.utils.each(titles,function(title) {
-				tiddlers.push({
-					title: title,
-					text: self.command.commander.wiki.renderTiddler("text/plain",title)
-				})
-			});
-			data = JSON.stringify(tiddlers); 
-			break;
-		case "json-raw-tiddlers":
-			// Intentional fall-through
-		default:
-			data = this.command.commander.wiki.getTiddlersAsJson(outgoingFilter);
-			break;
-	}
-	return data;
-};
-
-Pipe.prototype.processIncomingData = function(data) {
-	var pipeInfoOutput = this.pipeInfo.output || {},
-		jsonData;
-	switch(pipeInfoOutput.format || "text") {
-		case "json-raw-tiddlers":
-			try {
-				jsonData = JSON.parse(data);
-			} catch(e) {
-				this.log("Error parsing returned JSON: " + e + "\n\n\n->\n" + data);
-			}
-			// Add the tiddlers
-			if(jsonData) {
-				this.command.commander.wiki.addTiddlers(jsonData);				
-			}
-			break;
-		case "text":
-			// Intentional fall-through
-		default:
-console.log("Writing tiddler",pipeInfoOutput.tiddler,{
-				text: data, title: this.incomingTitle
-			})
-			this.command.commander.wiki.addTiddler(new $tw.Tiddler(pipeInfoOutput.tiddler,{
-				text: data, title: this.incomingTitle || pipeInfoOutput.tiddler.title
-			}));
-			break;
-	}
-};
-
-exports.Command = Command;
-
-})();

core/modules/editor/engines/framed.js

@@ -205,7 +205,7 @@ FramedEngine.prototype.handleInputEvent = function(event) {
 	this.widget.saveChanges(this.getText());
 	this.fixHeight();
 	if(this.widget.editInputActions) {
-		this.widget.invokeActionString(this.widget.editInputActions);
+		this.widget.invokeActionString(this.widget.editInputActions,this,event,{actionValue: this.getText()});
 	}
 	return true;
 };

core/modules/editor/engines/simple.js

@@ -133,7 +133,7 @@ SimpleEngine.prototype.handleInputEvent = function(event) {
 	this.widget.saveChanges(this.getText());
 	this.fixHeight();
 	if(this.widget.editInputActions) {
-		this.widget.invokeActionString(this.widget.editInputActions);
+		this.widget.invokeActionString(this.widget.editInputActions,this,event,{actionValue: this.getText()});
 	}
 	return true;
 };

core/modules/editor/factory.js

@@ -324,7 +324,7 @@ function editTextWidgetFactory(toolbarEngine,nonToolbarEngine) {
 	If there are no Files, let the browser handle it.
 	*/
 	EditTextWidget.prototype.handleDropEvent = function(event) {
-		if(event.dataTransfer.files.length) {
+		if($tw.utils.dragEventContainsFiles(event)) {
 			event.preventDefault();
 			event.stopPropagation();
 			this.dispatchDOMEvent(this.cloneEvent(event,["dataTransfer"]));

core/modules/filterrunprefixes/cascade.js

@@ -0,0 +1,53 @@
+/*\
+title: $:/core/modules/filterrunprefixes/cascade.js
+type: application/javascript
+module-type: filterrunprefix
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Export our filter prefix function
+*/
+exports.cascade = function(operationSubFunction,options) {
+	return function(results,source,widget) {
+		if(results.length !== 0) {
+			var filterList = operationSubFunction(source,widget),
+				filterFnList = [];
+			var inputResults = results.toArray();
+			results.clear();
+			$tw.utils.each(inputResults,function(title) {
+				var result = ""; // If no filter matches, we return an empty string
+				$tw.utils.each(filterList,function(filter,index) {
+					if(!filterFnList[index]) {
+						filterFnList[index] = options.wiki.compileFilter(filter);
+					}
+					var output = filterFnList[index](options.wiki.makeTiddlerIterator([title]),{
+						getVariable: function(name,opts) {
+							opts = opts || {};
+							opts.variables = {
+								"currentTiddler": "" + title,
+								"..currentTiddler": widget.getVariable("currentTiddler")
+							};
+							if(name in opts.variables) {
+								return opts.variables[name];
+							} else {
+								return widget.getVariable(name,opts);
+							}
+						}
+					});
+					if(output.length !== 0) {
+						result = output[0];
+						return false;
+					}
+				});
+				results.push(result);
+			});
+		}
+	}
+};
+
+})();

core/modules/filterrunprefixes/filter.js

@@ -16,23 +16,30 @@ Export our filter function
 exports.filter = function(operationSubFunction,options) {
 	return function(results,source,widget) {
 		if(results.length > 0) {
-			var resultsToRemove = [];
+			var resultsToRemove = [],
+				index = 0;
 			results.each(function(title) {
 				var filtered = operationSubFunction(options.wiki.makeTiddlerIterator([title]),{
-					getVariable: function(name) {
-						switch(name) {
-							case "currentTiddler":
-								return "" + title;
-							case "..currentTiddler":
-								return widget.getVariable("currentTiddler");
-							default:
-								return widget.getVariable(name);
+					getVariable: function(name,opts) {
+						opts = opts || {};
+						opts.variables = {
+							"currentTiddler": "" + title,
+							"..currentTiddler": widget.getVariable("currentTiddler"),
+							"index": "" + index,
+							"revIndex": "" +  (results.length - 1 - index),
+							"length": "" + results.length
+						};
+						if(name in opts.variables) {
+							return opts.variables[name];
+						} else {
+							return widget.getVariable(name,opts);
 						}
 					}
 				});
 				if(filtered.length === 0) {
 					resultsToRemove.push(title);
 				}
+				++index;
 			});
 			results.remove(resultsToRemove);
 		}

core/modules/filterrunprefixes/map.js

@@ -15,22 +15,29 @@ Export our filter prefix function
 exports.map = function(operationSubFunction,options) {
 	return function(results,source,widget) {
 		if(results.length > 0) {
-			var inputTitles = results.toArray();
+			var inputTitles = results.toArray(),
+				index = 0;
 			results.clear();
 			$tw.utils.each(inputTitles,function(title) {
 				var filtered = operationSubFunction(options.wiki.makeTiddlerIterator([title]),{
-					getVariable: function(name) {
-						switch(name) {
-							case "currentTiddler":
-								return "" + title;
-							case "..currentTiddler":
-								return widget.getVariable("currentTiddler");
-							default:
-								return widget.getVariable(name);
+					getVariable: function(name,opts) {
+						opts = opts || {};
+						opts.variables = {
+							"currentTiddler": "" + title,
+							"..currentTiddler": widget.getVariable("currentTiddler"),
+							"index": "" + index,
+							"revIndex": "" +  (inputTitles.length - 1 - index),
+							"length": "" + inputTitles.length
+						};
+						if(name in opts.variables) {
+							return opts.variables[name];
+						} else {
+							return widget.getVariable(name,opts);
 						}
 					}
 				});
 				results.push(filtered[0] || "");
+				++index;
 			});
 		}
 	}

core/modules/filterrunprefixes/reduce.js

@@ -15,26 +15,24 @@ Export our filter prefix function
 exports.reduce = function(operationSubFunction,options) {
 	return function(results,source,widget) {
 		if(results.length > 0) {
-			var accumulator = "";
-			var index = 0;
+			var accumulator = "",
+				index = 0;
 			results.each(function(title) {
 				var list = operationSubFunction(options.wiki.makeTiddlerIterator([title]),{
-					getVariable: function(name) {
-						switch(name) {
-							case "currentTiddler":
-								return "" + title;
-							case "..currentTiddler":
-								return widget.getVariable("currentTiddler");
-							case "accumulator":
-								return "" + accumulator;
-							case "index":
-								return "" + index;
-							case "revIndex":
-								return "" +  (results.length - 1 - index);
-							case "length":
-								return "" + results.length;
-							default:
-								return widget.getVariable(name);
+					getVariable: function(name,opts) {
+						opts = opts || {};
+						opts.variables = {
+							"currentTiddler": "" + title,
+							"..currentTiddler": widget.getVariable("currentTiddler"),
+							"index": "" + index,
+							"revIndex": "" +  (results.length - 1 - index),
+							"length": "" + results.length,
+							"accumulator": "" + accumulator
+						};
+						if(name in opts.variables) {
+							return opts.variables[name];
+						} else {
+							return widget.getVariable(name,opts);
 						}
 					}
 				});

core/modules/filterrunprefixes/sort.js

@@ -26,14 +26,16 @@ exports.sort = function(operationSubFunction,options) {
 				compareFn;
 			results.each(function(title) {
 				var key = operationSubFunction(options.wiki.makeTiddlerIterator([title]),{
-					getVariable: function(name) {
-						switch(name) {
-							case "currentTiddler":
-								return "" + title;
-							case "..currentTiddler":
-								return widget.getVariable("currentTiddler");
-							default:
-								return widget.getVariable(name);
+					getVariable: function(name,opts) {
+						opts = opts || {};
+						opts.variables = {
+							"currentTiddler": "" + title,
+							"..currentTiddler": widget.getVariable("currentTiddler")
+						};
+						if(name in opts.variables) {
+							return opts.variables[name];
+						} else {
+							return widget.getVariable(name,opts);
 						}
 					}
 				});

core/modules/filters/listops.js

@@ -103,4 +103,16 @@ exports.nth = function(source,operator,options) {
 	return results.slice(count - 1,count);
 };
 
+/*
+The zero based nth member of the list
+*/
+exports.zth = function(source,operator,options) {
+	var count = $tw.utils.getInt(operator.operand,0),
+		results = [];
+	source(function(tiddler,title) {
+		results.push(title);
+	});
+	return results.slice(count,count + 1);
+};
+
 })();

core/modules/filters/strings.js

@@ -121,21 +121,23 @@ exports["search-replace"] = function(source,operator,options) {
 		flagSuffix = (suffixes[0] ? (suffixes[0][0] || "") : ""),
 		flags = (flagSuffix.indexOf("g") !== -1 ? "g" : "") + (flagSuffix.indexOf("i") !== -1 ? "i" : "") + (flagSuffix.indexOf("m") !== -1 ? "m" : ""),
 		isRegExp = (suffixes[1] && suffixes[1][0] === "regexp") ? true : false,
-		searchTerm,
+		//Escape regexp characters if the operand is not a regular expression
+		searchTerm = isRegExp ? operator.operand : $tw.utils.escapeRegExp(operator.operand),
+		//Escape $ character in replacement string if not in regular expression mode
+		replacement = isRegExp ? operator.operands[1] : (operator.operands[1]||"").replace(/\$/g,"$$$$"),
 		regExp;
+	try {
+		regExp = new RegExp(searchTerm,flags);
+	} catch(ex) {
+		return ["RegExp error: " + ex];
+	}
 
 	source(function(tiddler,title) {
 		if(title && (operator.operands.length > 1)) {
-			//Escape regexp characters if the operand is not a regular expression
-			searchTerm = isRegExp ? operator.operand : $tw.utils.escapeRegExp(operator.operand);
-			try {
-				regExp = new RegExp(searchTerm,flags);
-			} catch(ex) {
-				return ["RegExp error: " + ex];
-			}
 			results.push(
-				title.replace(regExp,operator.operands[1])
+				title.replace(regExp,replacement)
 			);
+			regExp.lastIndex = 0;
 		} else {
 			results.push(title);
 		}

core/modules/server/routes/post-commands.js

@@ -1,55 +0,0 @@
-/*\
-title: $:/core/modules/server/routes/post-commands.js
-type: application/javascript
-module-type: route
-
-POST /commands/
-
-\*/
-(function() {
-
-/*jslint node: true, browser: true */
-/*global $tw: false */
-"use strict";
-
-exports.method = "POST";
-
-exports.path = /^\/commands\/$/;
-
-exports.handler = function(request,response,state) {	
-	// Check we're enabled
-	if(!($tw.boot.wikiInfo.config || {})["allow-remote-commands"]) {
-		response.writeHead(404);
-		response.end();
-		return;
-	}
-	// Get the job descriptor
-	var jobDescriptor = JSON.parse(state.data);
-	console.log("JOB START:",jobDescriptor)
-	// Respond OK
-	response.writeHead(204, "OK",{
-		"Content-Type": "application/json"
-	});
-	// Maintain status
-	var setStatus = function(status,message) {
-		if(jobDescriptor.statusTitle) {
-			state.wiki.addTiddler(new $tw.Tiddler({title: jobDescriptor.statusTitle,text: status,message: message}));
-		}
-	}
-	setStatus("started");
-	// Initiate the commands
-	var commander = new $tw.Commander(
-		jobDescriptor.commands || [],
-		function(err) {
-			setStatus(err ? "error" : "ok",err ? err : undefined);
-			console.log("JOB END:",err)
-		},
-		state.wiki,
-		{output: process.stdout, error: process.stderr}
-	);
-	commander.execute();
-	// Return results
-	response.end(JSON.stringify({}),"utf8"); // Nothing useful for us to return 
-};
-
-}());

core/modules/syncer.js

@@ -130,11 +130,6 @@ function Syncer(options) {
 		$tw.rootWidget.addEventListener("tm-server-refresh",function() {
 			self.handleRefreshEvent();
 		});
-		$tw.rootWidget.addEventListener("tm-execute-job",function(event) {
-			if(self.syncadaptor && self.syncadaptor.executeJob) {
-				self.syncadaptor.executeJob(event);
-			}
-		});
 		$tw.rootWidget.addEventListener("tm-copy-syncer-logs-to-clipboard",function() {
 			$tw.utils.copyToClipboard($tw.utils.getSystemInfo() + "\n\nLog:\n" + self.logger.getBuffer());
 		});

core/modules/utils/dom/dragndrop.js

@@ -208,10 +208,10 @@ function parseJSONTiddlers(json,fallbackTitle) {
 	return data;
 };
 
-exports.dragEventContainsFiles = function(event) {
+function dragEventContainsType(event,targetType) {
 	if(event.dataTransfer.types) {
 		for(var i=0; i<event.dataTransfer.types.length; i++) {
-			if(event.dataTransfer.types[i] === "Files") {
+			if(event.dataTransfer.types[i] === targetType) {
 				return true;
 				break;
 			}
@@ -220,4 +220,10 @@ exports.dragEventContainsFiles = function(event) {
 	return false;
 };
 
+exports.dragEventContainsFiles = function(event) {
+	return (dragEventContainsType(event,"Files") && !dragEventContainsType(event,"text/plain"));
+};
+
+exports.dragEventContainsType = dragEventContainsType;
+
 })();

core/modules/widgets/action-sendmessage.js

@@ -87,7 +87,7 @@ SendMessageWidget.prototype.invokeAction = function(triggeringWidget,event) {
 		param: param,
 		paramObject: paramObject,
 		event: event,
-		currentTiddler: this.getVariable("currentTiddler"),
+		tiddlerTitle: this.getVariable("currentTiddler"),
 		navigateFromTitle: this.getVariable("storyTiddler")
 	};
 	this.dispatchEvent(params);

core/modules/widgets/codeblock.js

@@ -52,7 +52,13 @@ CodeBlockWidget.prototype.execute = function() {
 Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
 */
 CodeBlockWidget.prototype.refresh = function(changedTiddlers) {
-	return false;
+	var changedAttributes = this.computeAttributes();
+	if(changedAttributes.code || changedAttributes.language) {
+		this.refreshSelf();
+		return true;
+	} else {
+		return false;
+	}
 };
 
 exports.codeblock = CodeBlockWidget;

core/modules/widgets/dropzone.js

@@ -198,7 +198,8 @@ DropZoneWidget.prototype.handleDropEvent  = function(event) {
 	this.resetState();
 	// Import any files in the drop
 	var numFiles = 0;
-	if(dataTransfer.files) {
+	// If we have type text/vnd.tiddlywiki then skip trying to import files
+	if(dataTransfer.files && !$tw.utils.dragEventContainsType(event,"text/vnd.tiddler")) {
 		numFiles = this.wiki.readFiles(dataTransfer.files,{
 			callback: readFileCallback,
 			deserializer: this.dropzoneDeserializer

core/modules/widgets/let.js

@@ -0,0 +1,96 @@
+/*\
+title: $:/core/modules/widgets/let.js
+type: application/javascript
+module-type: widget
+
+This widget allows defining multiple variables at once, while allowing
+the later variables to depend upon the earlier ones.
+
+```
+\define helloworld() Hello world!
+<$let currentTiddler="target" value={{!!value}} currentTiddler="different">
+  {{!!value}} will be different from <<value>>
+</$let>
+```
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+var Widget = require("$:/core/modules/widgets/widget.js").widget;
+
+var LetWidget = function(parseTreeNode,options) {
+	// Initialise
+	this.initialise(parseTreeNode,options);
+};
+
+/*
+Inherit from the base widget class
+*/
+LetWidget.prototype = new Widget();
+
+/*
+Render this widget into the DOM
+*/
+LetWidget.prototype.render = function(parent,nextSibling) {
+	this.parentDomNode = parent;
+	this.computeAttributes();
+	this.execute();
+	this.renderChildren(parent,nextSibling);
+};
+
+LetWidget.prototype.computeAttributes = function() {
+	// Before computing attributes, we must make clear that none of the
+	// existing attributes are staged for lookup, even on a refresh
+	var changedAttributes = {},
+		self = this;
+	this.currentValueFor = Object.create(null);
+	$tw.utils.each(this.parseTreeNode.orderedAttributes,function(attribute,index) {
+		var value = self.computeAttribute(attribute),
+			name = attribute.name;
+		if(name.charAt(0) !== "$") {
+			// Now that it's prepped, we're allowed to look this variable up
+			// when defining later variables
+			self.currentValueFor[name] = value;
+		}
+	});
+	// Run through again, setting variables and looking for differences
+	$tw.utils.each(this.currentValueFor,function(value,name) {
+		if (self.attributes[name] !== value) {
+			self.attributes[name] = value;
+			self.setVariable(name,value);
+			changedAttributes[name] = true;
+		}
+	});
+	return changedAttributes;
+};
+
+LetWidget.prototype.getVariableInfo = function(name,options) {
+	// Special handling: If this variable exists in this very $let, we can
+	// use it, but only if it's been staged.
+	if ($tw.utils.hop(this.currentValueFor,name)) {
+		return {
+			text: this.currentValueFor[name]
+		};
+	}
+	return Widget.prototype.getVariableInfo.call(this,name,options);
+};
+
+/*
+Refresh the widget by ensuring our attributes are up to date
+*/
+LetWidget.prototype.refresh = function(changedTiddlers) {
+	var changedAttributes = this.computeAttributes();
+	if($tw.utils.count(changedAttributes) > 0) {
+		this.refreshSelf();
+		return true;
+	}
+	return this.refreshChildren(changedTiddlers);
+};
+
+exports["let"] = LetWidget;
+
+})();

core/modules/widgets/vars.js

@@ -29,14 +29,12 @@ var VarsWidget = function(parseTreeNode,options) {
 /*
 Inherit from the base widget class
 */
-VarsWidget.prototype = Object.create(Widget.prototype);
+VarsWidget.prototype = new Widget();
 
 /*
 Render this widget into the DOM
 */
 VarsWidget.prototype.render = function(parent,nextSibling) {
-	// Call the constructor
-	Widget.call(this);
 	this.parentDomNode = parent;
 	this.computeAttributes();
 	this.execute();
@@ -63,7 +61,7 @@ Refresh the widget by ensuring our attributes are up to date
 */
 VarsWidget.prototype.refresh = function(changedTiddlers) {
 	var changedAttributes = this.computeAttributes();
-	if(Object.keys(changedAttributes).length) {
+	if($tw.utils.count(changedAttributes) > 0) {
 		this.refreshSelf();
 		return true;
 	}

core/modules/widgets/widget.js

@@ -122,7 +122,7 @@ Widget.prototype.getVariableInfo = function(name,options) {
 		});
 		// Only substitute variable references if this variable was defined with the \define pragma
 		if(variable.isMacroDefinition) {
-			value = this.substituteVariableReferences(value);
+			value = this.substituteVariableReferences(value,options);
 		}
 		return {
 			text: value,
@@ -175,10 +175,10 @@ Widget.prototype.resolveVariableParameters = function(formalParams,actualParams)
 	return results;
 };
 
-Widget.prototype.substituteVariableReferences = function(text) {
+Widget.prototype.substituteVariableReferences = function(text,options) {
 	var self = this;
 	return (text || "").replace(/\$\(([^\)\$]+)\)\$/g,function(match,p1,offset,string) {
-		return self.getVariable(p1,{defaultValue: ""});
+		return options.variables && options.variables[p1] || (self.getVariable(p1,{defaultValue: ""}));
 	});
 };
 
@@ -263,19 +263,9 @@ Compute the current values of the attributes of the widget. Returns a hashmap of
 */
 Widget.prototype.computeAttributes = function() {
 	var changedAttributes = {},
-		self = this,
-		value;
+		self = this;
 	$tw.utils.each(this.parseTreeNode.attributes,function(attribute,name) {
-		if(attribute.type === "filtered") {
-			value = self.wiki.filterTiddlers(attribute.filter,self)[0] || "";
-		} else if(attribute.type === "indirect") {
-			value = self.wiki.getTextReference(attribute.textReference,"",self.getVariable("currentTiddler"));
-		} else if(attribute.type === "macro") {
-			value = self.getVariable(attribute.value.name,{params: attribute.value.params});
-		} else { // String attribute
-			value = attribute.value;
-		}
-		// Check whether the attribute has changed
+		var value = self.computeAttribute(attribute);
 		if(self.attributes[name] !== value) {
 			self.attributes[name] = value;
 			changedAttributes[name] = true;
@@ -284,6 +274,20 @@ Widget.prototype.computeAttributes = function() {
 	return changedAttributes;
 };
 
+Widget.prototype.computeAttribute = function(attribute) {
+	var value;
+	if(attribute.type === "filtered") {
+		value = this.wiki.filterTiddlers(attribute.filter,this)[0] || "";
+	} else if(attribute.type === "indirect") {
+		value = this.wiki.getTextReference(attribute.textReference,"",this.getVariable("currentTiddler"));
+	} else if(attribute.type === "macro") {
+		value = this.getVariable(attribute.value.name,{params: attribute.value.params});
+	} else { // String attribute
+		value = attribute.value;
+	}
+	return value;
+};
+
 /*
 Check for the presence of an attribute
 */

core/ui/Components/tag-link.tid

@@ -1,7 +1,7 @@
 title: $:/core/ui/Components/tag-link
 
 <$link>
-<$set name="backgroundColor" value={{!!color}}>
+<$set name="backgroundColor" value={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerColourFilter]!is[draft]get[text]] }}}>
 <span style=<<tag-styles>> class="tc-tag-label">
 <$view field="title" format="text"/>
 </span>

core/ui/ControlPanel/Cascades.tid

@@ -0,0 +1,9 @@
+title: $:/core/ui/ControlPanel/Cascades
+tags: $:/tags/ControlPanel/Advanced
+caption: {{$:/language/ControlPanel/Cascades/Caption}}
+
+{{$:/language/ControlPanel/Cascades/Hint}}
+
+<div class="tc-control-panel">
+<$macrocall $name="tabs" tabsList="[all[shadows+tiddlers]tag[$:/tags/ControlPanel/Cascades]!has[draft.of]]" default="$:/core/ui/ControlPanel/StoryTiddler"/>
+</div>

core/ui/ControlPanel/Cascades/EditTemplateBody.tid

@@ -0,0 +1,9 @@
+title: $:/core/ui/ControlPanel/EditTemplateBody
+tags: $:/tags/ControlPanel/Cascades
+caption: {{$:/language/ControlPanel/EditTemplateBody/Caption}}
+
+\define lingo-base() $:/language/ControlPanel/EditTemplateBody/
+
+<<lingo Hint>>
+
+{{$:/tags/EditTemplateBodyFilter||$:/snippets/ListTaggedCascade}}

core/ui/ControlPanel/Cascades/StoryTiddler.tid

@@ -0,0 +1,9 @@
+title: $:/core/ui/ControlPanel/StoryTiddler
+tags: $:/tags/ControlPanel/Cascades
+caption: {{$:/language/ControlPanel/StoryTiddler/Caption}}
+
+\define lingo-base() $:/language/ControlPanel/StoryTiddler/
+
+<<lingo Hint>>
+
+{{$:/tags/StoryTiddlerTemplateFilter||$:/snippets/ListTaggedCascade}}

core/ui/ControlPanel/Cascades/TiddlerColour.tid

@@ -0,0 +1,9 @@
+title: $:/core/ui/ControlPanel/TiddlerColour
+tags: $:/tags/ControlPanel/Cascades
+caption: {{$:/language/ControlPanel/TiddlerColour/Caption}}
+
+\define lingo-base() $:/language/ControlPanel/TiddlerColour/
+
+<<lingo Hint>>
+
+{{$:/tags/TiddlerColourFilter||$:/snippets/ListTaggedCascade}}

core/ui/ControlPanel/Cascades/TiddlerIcon.tid

@@ -0,0 +1,9 @@
+title: $:/core/ui/ControlPanel/TiddlerIcon
+tags: $:/tags/ControlPanel/Cascades
+caption: {{$:/language/ControlPanel/TiddlerIcon/Caption}}
+
+\define lingo-base() $:/language/ControlPanel/TiddlerIcon/
+
+<<lingo Hint>>
+
+{{$:/tags/TiddlerIconFilter||$:/snippets/ListTaggedCascade}}

core/ui/ControlPanel/Cascades/ViewTemplateBody.tid

@@ -0,0 +1,9 @@
+title: $:/core/ui/ControlPanel/ViewTemplateBody
+tags: $:/tags/ControlPanel/Cascades
+caption: {{$:/language/ControlPanel/ViewTemplateBody/Caption}}
+
+\define lingo-base() $:/language/ControlPanel/ViewTemplateBody/
+
+<<lingo Hint>>
+
+{{$:/tags/ViewTemplateBodyFilter||$:/snippets/ListTaggedCascade}}

core/ui/ControlPanel/Cascades/ViewTemplateTitle.tid

@@ -0,0 +1,9 @@
+title: $:/core/ui/ControlPanel/ViewTemplateTitle
+tags: $:/tags/ControlPanel/Cascades
+caption: {{$:/language/ControlPanel/ViewTemplateTitle/Caption}}
+
+\define lingo-base() $:/language/ControlPanel/ViewTemplateTitle/
+
+<<lingo Hint>>
+
+{{$:/tags/ViewTemplateTitleFilter||$:/snippets/ListTaggedCascade}}

core/ui/EditTemplate/body.tid

@@ -1,54 +1,4 @@
 title: $:/core/ui/EditTemplate/body
 tags: $:/tags/EditTemplate
 
-\define lingo-base() $:/language/EditTemplate/Body/
-\define config-visibility-title()
-$:/config/EditorToolbarButtons/Visibility/$(currentTiddler)$
-\end
-
-\define importFileActions()
-<$action-popup $state=<<importState>> $coords="(0,0,0,0)" $floating="yes"/>
-\end
-
-<$list filter="[all[current]has[_canonical_uri]]">
-
-<div class="tc-message-box">
-
-<<lingo External/Hint>>
-
-<a href={{!!_canonical_uri}}><$text text={{!!_canonical_uri}}/></a>
-
-<$edit-text field="_canonical_uri" class="tc-edit-fields" tabindex={{$:/config/EditTabIndex}} cancelPopups="yes"></$edit-text>
-
-</div>
-
-</$list>
-
-<$list filter="[all[current]!has[_canonical_uri]]">
-<$vars importTitle=<<qualify $:/ImportImage>> importState=<<qualify $:/state/ImportImage>> >
-<$dropzone importTitle=<<importTitle>> autoOpenOnImport="no" contentTypesFilter={{$:/config/Editor/ImportContentTypesFilter}} class="tc-dropzone-editor" enable={{{ [{$:/config/DragAndDrop/Enable}match[no]] :else[subfilter{$:/config/Editor/EnableImportFilter}then[yes]else[no]] }}} filesOnly="yes" actions=<<importFileActions>> ><$reveal state="$:/state/showeditpreview" type="match" text="yes">
-<div class="tc-tiddler-preview">
-
-<$transclude tiddler="$:/core/ui/EditTemplate/body/editor" mode="inline"/>
-
-<div class="tc-tiddler-preview-preview">
-
-<$transclude tiddler={{$:/state/editpreviewtype}} mode="inline">
-
-<$transclude tiddler="$:/core/ui/EditTemplate/body/preview/output" mode="inline"/>
-
-</$transclude>
-
-</div>
-
-</div>
-</$reveal>
-
-<$reveal state="$:/state/showeditpreview" type="nomatch" text="yes">
-
-<$transclude tiddler="$:/core/ui/EditTemplate/body/editor" mode="inline"/>
-
-</$reveal>
-</$dropzone>
-</$vars>
-</$list>
+<$transclude tiddler={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/EditTemplateBodyFilter]!is[draft]get[text]] :and[!is[blank]else[$:/core/ui/EditTemplate/body/default]] }}} />

core/ui/EditTemplate/body/canonical-uri.tid

@@ -0,0 +1,13 @@
+title: $:/core/ui/EditTemplate/body/canonical-uri
+
+\define lingo-base() $:/language/EditTemplate/Body/
+
+<div class="tc-message-box">
+
+<<lingo External/Hint>>
+
+<a href={{!!_canonical_uri}}><$text text={{!!_canonical_uri}}/></a>
+
+<$edit-text field="_canonical_uri" class="tc-edit-fields" tabindex={{$:/config/EditTabIndex}} cancelPopups="yes"></$edit-text>
+
+</div>

core/ui/EditTemplate/body/default.tid

@@ -0,0 +1,38 @@
+title: $:/core/ui/EditTemplate/body/default
+
+\define config-visibility-title()
+$:/config/EditorToolbarButtons/Visibility/$(currentTiddler)$
+\end
+
+\define importFileActions()
+<$action-popup $state=<<importState>> $coords="(0,0,0,0)" $floating="yes"/>
+\end
+
+<$set name="edit-preview-state" value={{{ [{$:/config/ShowEditPreview/PerTiddler}!match[yes]then[$:/state/showeditpreview]] :else[<qualify "$:/state/showeditpreview">] }}}>
+<$vars importTitle=<<qualify $:/ImportImage>> importState=<<qualify $:/state/ImportImage>> >
+<$dropzone importTitle=<<importTitle>> autoOpenOnImport="no" contentTypesFilter={{$:/config/Editor/ImportContentTypesFilter}} class="tc-dropzone-editor" enable={{{ [{$:/config/DragAndDrop/Enable}match[no]] :else[subfilter{$:/config/Editor/EnableImportFilter}then[yes]else[no]] }}} filesOnly="yes" actions=<<importFileActions>> ><$reveal stateTitle=<<edit-preview-state>> type="match" text="yes">
+<div class="tc-tiddler-preview">
+
+<$transclude tiddler="$:/core/ui/EditTemplate/body/editor" mode="inline"/>
+
+<div class="tc-tiddler-preview-preview">
+
+<$transclude tiddler={{$:/state/editpreviewtype}} mode="inline">
+
+<$transclude tiddler="$:/core/ui/EditTemplate/body/preview/output" mode="inline"/>
+
+</$transclude>
+
+</div>
+
+</div>
+</$reveal>
+
+<$reveal stateTitle=<<edit-preview-state>> type="nomatch" text="yes">
+
+<$transclude tiddler="$:/core/ui/EditTemplate/body/editor" mode="inline"/>
+
+</$reveal>
+</$dropzone>
+</$vars>
+</$set>

core/ui/EditTemplate/tags.tid

@@ -29,7 +29,7 @@ color:$(foregroundColor)$;
 \whitespace trim
 <div class="tc-edit-tags">
 <$list filter="[list[!!$tagField$]sort[title]]" storyview="pop">
-<$macrocall $name="tag-body" colour={{!!color}} palette={{$:/palette}} icon={{!!icon}} tagField=<<__tagField__>>/>
+<$macrocall $name="tag-body" colour={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerColourFilter]!is[draft]get[text]] }}} palette={{$:/palette}} icon={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerIconFilter]!is[draft]get[text]] }}} tagField=<<__tagField__>>/>
 </$list>
 <$vars tabIndex={{$:/config/EditTabIndex}} cancelPopups="yes">
 <$macrocall $name="tag-picker" tagField=<<__tagField__>>/>

core/ui/EditorToolbar/preview.tid

@@ -8,11 +8,11 @@ condition: [<targetTiddler>]
 button-classes: tc-text-editor-toolbar-item-start-group
 shortcuts: ((preview))
 
-<$reveal state="$:/state/showeditpreview" type="match" text="yes" tag="span">
+<$reveal state=<<edit-preview-state>> type="match" text="yes" tag="span">
 {{$:/core/images/preview-open}}
-<$action-setfield $tiddler="$:/state/showeditpreview" $value="no"/>
+<$action-setfield $tiddler=<<edit-preview-state>> $value="no"/>
 </$reveal>
-<$reveal state="$:/state/showeditpreview" type="nomatch" text="yes" tag="span">
+<$reveal state=<<edit-preview-state>> type="nomatch" text="yes" tag="span">
 {{$:/core/images/preview-closed}}
-<$action-setfield $tiddler="$:/state/showeditpreview" $value="yes"/>
+<$action-setfield $tiddler=<<edit-preview-state>> $value="yes"/>
 </$reveal>

core/ui/ListTaggedCascade.tid

@@ -0,0 +1,14 @@
+title: $:/snippets/ListTaggedCascade
+
+{{||$:/language/ControlPanel/Cascades/TagPrompt}}
+
+<ol>
+<$list filter="[all[shadows+tiddlers]tag<currentTiddler>]">
+<li>
+<div>
+<$link><$text text=<<currentTiddler>>/></$link>
+</div>
+<$codeblock code={{!!text}}/>
+</li>
+</$list>
+</ol>

core/ui/PageTemplate/story.tid

@@ -14,7 +14,7 @@ tags: $:/tags/PageTemplate
 
 </section>
 
-<$list filter="[list[$:/StoryList]]" history="$:/HistoryList" template={{$:/config/ui/ViewTemplate}} editTemplate={{$:/config/ui/EditTemplate}} storyview={{$:/view}} emptyMessage={{$:/config/EmptyStoryMessage}}/>
+<$list filter="[list[$:/StoryList]]" history="$:/HistoryList" template="$:/core/ui/StoryTiddlerTemplate" storyview={{$:/view}} emptyMessage={{$:/config/EmptyStoryMessage}}/>
 
 <section class="story-frontdrop">
 

core/ui/PluginListItemTemplate.tid

@@ -1,5 +1,15 @@
 title: $:/core/ui/PluginListItemTemplate
 
-<div class="tc-menu-list-item">
-<$link to={{!!title}}><$view field="description"><$view field="title"/></$view></$link>
-</div>
+\whitespace trim
+<$link to={{!!title}} class="tc-plugin-info">
+	<div class="tc-plugin-info-chunk tc-plugin-info-icon">
+		<$transclude tiddler=<<currentTiddler>> subtiddler={{{ [<currentTiddler>addsuffix[/icon]] }}}>
+			<$transclude tiddler={{{ [<currentTiddler>get[plugin-type]addprefix[$:/core/images/plugin-generic-]] }}}/>
+		</$transclude>
+	</div>
+	<div class="tc-plugin-info-chunk tc-plugin-info-description">
+		<h1>
+			''<$text text={{{ [<currentTiddler>get[name]] ~[<currentTiddler>split[/]last[1]] }}}/>'':&nbsp;<$view field="description"><$view field="title"/></$view>
+		</h1>
+	</div>
+</$link>

core/ui/StoryTiddlerTemplate.tid

@@ -0,0 +1,3 @@
+title: $:/core/ui/StoryTiddlerTemplate
+
+<$transclude tiddler={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/StoryTiddlerTemplateFilter]!is[draft]get[text]] :and[!is[blank]else{$:/config/ui/ViewTemplate}] }}} />

core/ui/TagPickerTagTemplate.tid

@@ -13,10 +13,10 @@ title: $:/core/ui/TagPickerTagTemplate
 <$action-setfield $tiddler=<<refreshTitle>> text="yes"/>
 </$list>
 <<actions>>
-<$set name="backgroundColor" value={{!!color}}>
-<$wikify name="foregroundColor" text="""<$macrocall $name="contrastcolour" target={{!!color}} fallbackTarget=<<fallbackTarget>> colourA=<<colourA>> colourB=<<colourB>>/>""">
+<$set name="backgroundColor" value={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerColourFilter]!is[draft]get[text]] }}}>
+<$wikify name="foregroundColor" text="""<$macrocall $name="contrastcolour" target=<<backgroundColor>> fallbackTarget=<<fallbackTarget>> colourA=<<colourA>> colourB=<<colourB>>/>""">
 <span class="tc-tag-label tc-btn-invisible" style=<<tag-pill-styles>>>
-<$transclude tiddler={{!!icon}}/><$view field="title" format="text"/>
+{{||$:/core/ui/TiddlerIcon}}<$view field="title" format="text"/>
 </span>
 </$wikify>
 </$set>

core/ui/TagTemplate.tid

@@ -3,7 +3,7 @@ title: $:/core/ui/TagTemplate
 \whitespace trim
 <span class="tc-tag-list-item" data-tag-title=<<currentTiddler>>>
 <$set name="transclusion" value=<<currentTiddler>>>
-<$macrocall $name="tag-pill-body" tag=<<currentTiddler>> icon={{!!icon}} colour={{!!color}} palette={{$:/palette}} element-tag="""$button""" element-attributes="""popup=<<qualify "$:/state/popup/tag">> dragFilter='[all[current]tagging[]]' tag='span'"""/>
+<$macrocall $name="tag-pill-body" tag=<<currentTiddler>> icon={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerIconFilter]!is[draft]get[text]] }}} colour={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerColourFilter]!is[draft]get[text]] }}} palette={{$:/palette}} element-tag="""$button""" element-attributes="""popup=<<qualify "$:/state/popup/tag">> dragFilter='[all[current]tagging[]]' tag='span'"""/>
 <$reveal state=<<qualify "$:/state/popup/tag">> type="popup" position="below" animate="yes" class="tc-drop-down">
 <$set name="tv-show-missing-links" value="yes">
 <$transclude tiddler="$:/core/ui/ListItemTemplate"/>

core/ui/TiddlerIcon.tid

@@ -0,0 +1,8 @@
+title: $:/core/ui/TiddlerIcon
+
+\whitespace trim
+<$let tiddlerIcon={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerIconFilter]!is[draft]get[text]] }}}>
+<$list filter="[<tiddlerIcon>!is[blank]]" variable="ignore">
+<$transclude tiddler=<<tiddlerIcon>>/>
+</$list>
+</$let>

core/ui/ViewTemplate/body.tid

@@ -3,14 +3,6 @@ tags: $:/tags/ViewTemplate
 
 <$reveal tag="div" class="tc-tiddler-body" type="nomatch" stateTitle=<<folded-state>> text="hide" retain="yes" animate="yes">
 
-<$list filter="[all[current]!has[plugin-type]!field:hide-body[yes]]">
-
-<$transclude>
-
-<$transclude tiddler="$:/language/MissingTiddler/Hint"/>
-
-</$transclude>
-
-</$list>
+<$transclude tiddler={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/ViewTemplateBodyFilter]!is[draft]get[text]] :and[!is[blank]else[$:/core/ui/ViewTemplate/body/default]] }}} />
 
 </$reveal>

core/ui/ViewTemplate/body/blank.tid

@@ -0,0 +1,3 @@
+title: $:/core/ui/ViewTemplate/body/blank
+
+<!-- Intentionally blank -->

core/ui/ViewTemplate/body/code.tid

@@ -0,0 +1,3 @@
+title: $:/core/ui/ViewTemplate/body/code
+
+<$codeblock code={{{ [<currentTiddler>get[text]] }}} language={{{ [<currentTiddler>get[type]else[text/vnd.tiddlywiki]] }}}/>

core/ui/ViewTemplate/body/default.tid

@@ -0,0 +1,7 @@
+title: $:/core/ui/ViewTemplate/body/default
+
+<$transclude>
+
+<$transclude tiddler="$:/language/MissingTiddler/Hint"/>
+
+</$transclude>

core/ui/ViewTemplate/body/import.tid

@@ -1,5 +1,4 @@
-title: $:/core/ui/ViewTemplate/import
-tags: $:/tags/ViewTemplate
+title: $:/core/ui/ViewTemplate/body/import
 
 \define lingo-base() $:/language/Import/
 

core/ui/ViewTemplate/body/plugin.tid

@@ -0,0 +1,10 @@
+title: $:/core/ui/ViewTemplate/body/plugin
+
+<div class="tc-tiddler-plugin-info">
+<$let plugin-type={{!!plugin-type}}
+	default-popup-state="yes"
+	qualified-state=<<qualify "$:/state/plugin-info">>
+>
+{{||$:/core/ui/Components/plugin-info}}
+</$let>
+</div>

core/ui/ViewTemplate/plugin.tid

@@ -1,15 +0,0 @@
-title: $:/core/ui/ViewTemplate/plugin
-tags: $:/tags/ViewTemplate
-
-<$reveal tag="div" class="tc-tiddler-plugin-info" type="nomatch" stateTitle=<<folded-state>> text="hide" retain="yes" animate="yes">
-
-<$list filter="[all[current]has[plugin-type]] -[all[current]field:plugin-type[import]]">
-<$set name="plugin-type" value={{!!plugin-type}}>
-<$set name="default-popup-state" value="yes">
-<$set name="qualified-state" value=<<qualify "$:/state/plugin-info">>>
-{{||$:/core/ui/Components/plugin-info}}
-</$set>
-</$set>
-</$set>
-</$list>
-</$reveal>

core/ui/ViewTemplate/title.tid

@@ -12,25 +12,12 @@ fill:$(foregroundColor)$;
 </span>
 <$set name="tv-wikilinks" value={{$:/config/Tiddlers/TitleLinks}}>
 <$link>
-<$set name="foregroundColor" value={{!!color}}>
-<$list filter="[all[current]has[icon]]~[[$:/config/DefaultTiddlerIcon]has[text]]">
+<$let foregroundColor={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerColourFilter]!is[draft]get[text]] }}}>
 <span class="tc-tiddler-title-icon" style=<<title-styles>>>
-<$transclude tiddler={{!!icon}}>
-<$transclude tiddler={{$:/config/DefaultTiddlerIcon}}/>
-</$transclude>
+{{||$:/core/ui/TiddlerIcon}}
 </span>
-</$list>
-</$set>
-<$list filter="[all[current]removeprefix[$:/]]">
-<h2 class="tc-title" title={{$:/language/SystemTiddler/Tooltip}}>
-<span class="tc-system-title-prefix">$:/</span><$text text=<<currentTiddler>>/>
-</h2>
-</$list>
-<$list filter="[all[current]!prefix[$:/]]">
-<h2 class="tc-title">
-<$view field="title"/>
-</h2>
-</$list>
+</$let>
+<$transclude tiddler={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/ViewTemplateTitleFilter]!is[draft]get[text]] :and[!is[blank]else[$:/core/ui/ViewTemplate/title/default]] }}} />
 </$link>
 </$set>
 </div>

core/ui/ViewTemplate/title/default.tid

@@ -0,0 +1,6 @@
+title: $:/core/ui/ViewTemplate/title/default
+
+\whitespace trim
+<h2 class="tc-title">
+<$view field="title"/>
+</h2>

core/ui/ViewTemplate/title/system.tid

@@ -0,0 +1,6 @@
+title: $:/core/ui/ViewTemplate/title/system
+
+\whitespace trim
+<h2 class="tc-title" title={{$:/language/SystemTiddler/Tooltip}}>
+<span class="tc-system-title-prefix">$:/</span><$text text={{{ [<currentTiddler>removeprefix[$:/]] }}}/>
+</h2>

core/wiki/config/EditTemplateBodyFilters.multids

@@ -0,0 +1,5 @@
+title: $:/config/EditTemplateBodyFilters/
+tags: $:/tags/EditTemplateBodyFilter
+
+canonical-uri: [has[_canonical_uri]then[$:/core/ui/EditTemplate/body/canonical-uri]]
+default: [[$:/core/ui/EditTemplate/body/default]]

core/wiki/config/OfficialPluginLibrary.tid

@@ -1,6 +1,6 @@
 title: $:/config/OfficialPluginLibrary
 tags: $:/tags/PluginLibrary
-url: https://tiddlywiki.com/library/v5.2.0/index.html
+url: https://tiddlywiki.com/library/v5.2.1/index.html
 caption: {{$:/language/OfficialPluginLibrary}}
 
 {{$:/language/OfficialPluginLibrary/Hint}}

core/wiki/config/StoryTiddlerTemplateFilters.multids

@@ -0,0 +1,5 @@
+title: $:/config/StoryTiddlerTemplateFilters/
+tags: $:/tags/StoryTiddlerTemplateFilter
+
+draft: [is[draft]then{$:/config/ui/EditTemplate}]
+default: [{$:/config/ui/ViewTemplate}]

core/wiki/config/TiddlerColourFilters.multids

@@ -0,0 +1,5 @@
+title: $:/config/TiddlerColourFilters/
+tags: $:/tags/TiddlerColourFilter
+
+color-field: [has[color]then{!!color}]
+default: [[$:/config/DefaultTiddlerColour]has[text]get[text]trim[]]

core/wiki/config/TiddlerIconFilters.multids

@@ -0,0 +1,5 @@
+title: $:/config/TiddlerIconFilters/
+tags: $:/tags/TiddlerIconFilter
+
+icon-field: [has[icon]then{!!icon}]
+default: [{$:/config/DefaultTiddlerIcon}has[text]]

core/wiki/config/ViewTemplateBodyFilters.multids

@@ -0,0 +1,8 @@
+title: $:/config/ViewTemplateBodyFilters/
+tags: $:/tags/ViewTemplateBodyFilter
+
+system: [prefix[$:/boot/]] [prefix[$:/config/]] [prefix[$:/core/]!field:title[$:/core/readme]!field:title[$:/core/icon]] [prefix[$:/info/]] [prefix[$:/language/]] [prefix[$:/languages/]] [prefix[$:/snippets/]] [prefix[$:/state/]] [prefix[$:/status/]] [prefix[$:/info/]] [prefix[$:/temp/]] +[limit[1]then[$:/core/ui/ViewTemplate/body/code]]
+import: [field:plugin-type[import]then[$:/core/ui/ViewTemplate/body/import]]
+plugin: [has[plugin-type]then[$:/core/ui/ViewTemplate/body/plugin]]
+hide-body: [field:hide-body[yes]then[$:/core/ui/ViewTemplate/body/blank]]
+default: [[$:/core/ui/ViewTemplate/body/default]]

core/wiki/config/ViewTemplateTitleFilters.multids

@@ -0,0 +1,5 @@
+title: $:/config/ViewTemplateTitleFilters/
+tags: $:/tags/ViewTemplateTitleFilter
+
+system: [prefix[$:/]then[$:/core/ui/ViewTemplate/title/system]]
+default: [[$:/core/ui/ViewTemplate/title/default]]

core/wiki/debugstylesheets.tid

@@ -0,0 +1,9 @@
+title: $:/snippets/DebugStylesheets
+
+<style>[test]{list-style:'❌'}</style>
+<ul>
+<$list filter="[all[shadows+tiddlers]tag[$:/tags/Stylesheet]has[modified]]" counter="n">
+<style>{{!!text}}[test="<<n>>"]{list-style:disc;}</style>
+<li test=<<n>>><$link/></li>
+</$list>
+</ul>

core/wiki/macros/tag.tid

@@ -21,7 +21,9 @@ $actions$<$transclude tiddler="""$icon$"""/><$view tiddler=<<__tag__>> field="ti
 
 \define tag-pill(tag,element-tag:"span",element-attributes:"",actions:"")
 <span class="tc-tag-list-item" data-tag-title=<<__tag__>>>
-<$macrocall $name="tag-pill-body" tag=<<__tag__>> icon={{{ [<__tag__>get[icon]] }}} colour={{{ [<__tag__>get[color]] }}} palette={{$:/palette}} element-tag="""$element-tag$""" element-attributes="""$element-attributes$""" actions="""$actions$"""/>
+<$let currentTiddler=<<__tag__>>>
+<$macrocall $name="tag-pill-body" tag=<<__tag__>> icon={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerIconFilter]!is[draft]get[text]] }}} colour={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerColourFilter]!is[draft]get[text]] }}} palette={{$:/palette}} element-tag="""$element-tag$""" element-attributes="""$element-attributes$""" actions="""$actions$"""/>
+</$let>
 </span>
 \end
 

core/wiki/peek-stylesheets.tid

@@ -1,6 +1,7 @@
 title: $:/snippets/peek-stylesheets
 
 \define expandable-stylesheets-list()
+\whitespace trim
 <ol>
 <$list filter="[all[shadows+tiddlers]tag[$:/tags/Stylesheet]!has[draft.of]]">
 <$vars state=<<qualify "$:/state/peek-stylesheets/open/">>>
@@ -38,6 +39,7 @@ title: $:/snippets/peek-stylesheets
 \end
 
 \define stylesheets-list()
+\whitespace trim
 <ol>
 <$list filter="[all[shadows+tiddlers]tag[$:/tags/Stylesheet]!has[draft.of]]">
 <li>
@@ -57,6 +59,7 @@ title: $:/snippets/peek-stylesheets
 </$list>
 </ol>
 \end
+\whitespace trim
 
 <$vars modeState=<<qualify "$:/state/peek-stylesheets/mode/">>>
 

core/wiki/tags/EditTemplateBodyFilter.tid

@@ -0,0 +1,2 @@
+title: $:/tags/EditTemplateBodyFilter
+list: $:/config/EditTemplateBodyFilters/canonical-uri $:/config/EditTemplateBodyFilters/default

core/wiki/tags/StoryTiddlerTemplateFilter.tid

@@ -0,0 +1,2 @@
+title: $:/tags/StoryTiddlerTemplateFilter
+list: $:/config/StoryTiddlerTemplateFilters/draft $:/config/StoryTiddlerTemplateFilters/default

core/wiki/tags/TiddlerColourFilter.tid

@@ -0,0 +1,3 @@
+title: $:/tags/TiddlerColourFilter
+list: $:/config/TiddlerColourFilters/color-field $:/config/TiddlerColourFilters/default
+

core/wiki/tags/TiddlerIconFilter.tid

@@ -0,0 +1,3 @@
+title: $:/tags/TiddlerIconFilter
+list: $:/config/TiddlerIconFilters/icon-field $:/config/TiddlerIconFilters/default
+

core/wiki/tags/ViewTemplateBodyFilter.tid

@@ -0,0 +1,3 @@
+title: $:/tags/ViewTemplateBodyFilter
+list: $:/config/ViewTemplateBodyFilters/system $:/config/ViewTemplateBodyFilters/import $:/config/ViewTemplateBodyFilters/plugin $:/config/ViewTemplateBodyFilters/hide-body $:/config/ViewTemplateBodyFilters/default
+

core/wiki/tags/ViewTemplateTitleFilter.tid

@@ -0,0 +1,3 @@
+title: $:/tags/ViewTemplateTitleFilter
+list: $:/config/ViewTemplateTitleFilters/system $:/config/ViewTemplateTitleFilters/default
+

editions/dev/tiddlers/new/pipes/External Pipes.tid

@@ -1,123 +0,0 @@
-created: 20181001171604072
-modified: 20181001184306738
-title: External Pipes
-type: text/vnd.tiddlywiki
-
-!! Introduction
-
-The external pipes mechanism is intended to address the fact that it can be difficult for experienced developers to quickly get started working with TiddlyWiki's code because it requires a good understanding of JavaScript, and some relatively unusual concepts and techniques that are likely to be unfamiliar to most.
-
-Many software developers are comfortable using and building text-based command line tools that follow the Unix philosophy of using stdin/stdout or TCP sockets for input and output, allowing tools to be chained together in powerful ways.
-
-External pipes support data transfer with external programs via two techniques:
-
-* By directly executing the program and communicating with it via stdin and stdout ([[mimic.js|External Pipes mimic.js]] and [[stats.js|External Pipes stats.js]])
-* By connecting to an existing TCP socket via a host address and port ([[reverser.js|External Pipes reverser.js]])
-
-Pipes are registered and executed under Node.js. Execution can be triggered via a server command or via a message propagated from the browser.
-
-Pipes currently support a simple question/response model:
-
-* TiddlyWiki opens a connection to the host/port, or starts the external task
-* TiddlyWiki sends the outgoing data through the pipe
-* TiddlyWiki receives the incoming data through the pipe
-* The connection is close, or the external task exits
-
-!! `externalpipesdemo` Edition
-
-The edition at `editions/externalpipesdemo` in the TiddlyWiki 5 repo contains the example tasks referenced in this documentation.
-
-!! Configuration
-
-Pipes must be registered in the `tiddlywiki.info` file of a wiki folder. For example:
-
-{{External Pipes tiddlywiki.info}}
-
-!!! Task Configuration Properties
-
-TBD
-
-!!! Input Formats
-
-The available input formats are:
-
-* `raw-text` - concatenated raw text of the tiddlers
-* `rendered-text` - concatenated rendered text of the tiddlers
-* `rendered-html` - concatenated rendered html of the tiddlers
-* `json-raw-tiddlers` - raw tiddlers in JSON
-* `json-rendered-text-tiddlers` - rendered tiddlers in JSON
-
-!!! Output Formats
-
-The available output formats include:
-
-* `raw-text` - raw text
-* `json-raw-tiddlers` - raw tiddlers in JSON
-
-!! Usage
-
-Pipes can be invoked via the `--pipe` command, or via a widget message propagated from the browser to the server.
-
-!!! `--pipe` Command
-
-The `--pipe` command triggers the invocation of a pipe task. The parameters are:
-
-```
-tiddlywiki <wikifolder> --pipe <pipename> <filter> <incomingTitle> <arguments>...
-```
-
-The ''pipename'' identifies the pipe, and must match the name defined in the `tiddlywiki.info` file.
-
-The ''filter'' identifies the tiddlers to be passed to the pipe
-
-The ''incomingTitle'' provides a title to be applied to incoming tiddlers for the `raw-text` output format
-
-The remaining ''arguments'' are passed through to external task pipes, and ignored for other types of pipe.
-
-!!! `tm-exec-task` Message
-
-TBD
-
-!! Examples
-
-The edition `editions/externalpipesdemo` in the TiddlyWiki5 repo contains a demo wiki that invokes sample tasks.
-
-!!! Mimic
-
-The `mimic.js` example is a simple command line tool that accepts source text via stdin and outputs a sort of statistical parody of the input text. It is written without any knowledge of TiddlyWiki, and so serves as an example of using an existing text-based tool with TiddlyWiki.
-
-```
-tiddlywiki editions/externalpipesdemo/ --verbose --pipe mimic '[[Alice in Wonderland]]' HelloThere 5 4000 --build index
-```
-
-View the resulting wiki at `editions/externaltaskdemo/output/index.html`: the tiddler "HelloThere" will contain a garbled version of the "Alice in Wonderland" text.
-
-!!! Stats
-
-The `stats.js` example is a simple command line tool that accepts source text via stdin and outputs a sort of statistical parody of the input text. It is written without any knowledge of TiddlyWiki, and so serves as an example of using an existing text-based tool with TiddlyWiki.
-
-```
-tiddlywiki editions/externalpipesdemo/ --verbose --pipe stats '[[Alice in Wonderland]]' HelloThere --build index
-```
-
-View the resulting wiki at `editions/externaltaskdemo/output/index.html`: the tiddler "HelloThere" will contain statistics about the "Alice in Wonderland" text.
-
-!!! Reverser
-
-The `reverser.js` example is an simple command line tool that listens for connections on a host address and port, accepts source text and then returns the same text with the characters reversed.
-
-Two separate commands are needed to run the sample: one to get the server running, and the second to run TiddlyWiki and invoke the server.
-
-To run the server, open a command prompt in the `demo-tasks` directory and run:
-
-```
-../reverser.js 8081
-```
-
-And then in another command prompt in the root of the repo run:
-
-```
-tiddlywiki editions/externalpipesdemo/ --verbose --pipe reverser '[[Alice in Wonderland]]' HelloThere --build index
-```
-
-View the resulting wiki at `editions/externaltaskdemo/output/index.html`: the tiddler "HelloThere" will contain the reversed text of "Alice in Wonderland".

editions/dev/tiddlers/new/pipes/external-references/tiddlywiki.files

@@ -1,32 +0,0 @@
-{
-	"tiddlers": [
-		{
-			"file": "../../../../../externalpipesdemo/tiddlywiki.info",
-			"fields": {
-				"type": "text/plain",
-				"title": "External Pipes tiddlywiki.info"
-			}
-		},
-		{
-			"file": "../../../../../externalpipesdemo/demo-tasks/mimic.js",
-			"fields": {
-				"type": "application/javascript",
-				"title": "External Pipes mimic.js"
-			}
-		},
-		{
-			"file": "../../../../../externalpipesdemo/demo-tasks/reverser.js",
-			"fields": {
-				"type": "application/javascript",
-				"title": "External Pipes reverser.js"
-			}
-		},
-		{
-			"file": "../../../../../externalpipesdemo/demo-tasks/stats.js",
-			"fields": {
-				"type": "application/javascript",
-				"title": "External Pipes stats.js"
-			}
-		}
-	]
-}

editions/externalpipesdemo/demo-tasks/badtagger.js

@@ -1,80 +0,0 @@
-#!/usr/bin/env node
-
-/*
-A socket server that listens on a host/port for connections and suggests tags for the incoming text
-
-	badtagger.js <port> <host>
-
-This utility is provided as an example of using an external task that doesn't have any prior knowledge of
-TiddlyWiki. Like many Unix utilities, it just reads and writes to a socket.
-
-*/
-
-var net = require("net"),
-	port = parseInt(process.argv[2] || "",10) || 8081, // Port
-	host = process.argv[3] || "127.0.0.1"; // Host
-
-var server = net.createServer();
-
-server.listen(port,host);
-
-server.on("connection", function(sock) {
-	console.log("CONNECTED: " + sock.remoteAddress +":"+ sock.remotePort);
-	// Trap errors
-	sock.on("error",function(e) {
-		console.log("ERROR: " + e);
-	});
-	// Read data until the end
-	var accumulator = Buffer.alloc(0);
-	sock.on("data",function(data) {
-		console.log("DATA " + sock.remoteAddress + ": " + data.length);
-		accumulator = Buffer.concat([accumulator,Buffer.from(data)]);
-		while(accumulator.length > 4) {
-			var length = accumulator.readInt32BE(0);
-			if(accumulator.length >= (length + 4)) {
-				if(length < 1) {
-					throw "ERROR: Incoming message length field is less than 1";
-				}
-				var type = accumulator.readUInt8(4),
-					dataLength = length - 1,
-					data = accumulator.toString("latin1",5,dataLength + 5);
-				accumulator = accumulator.slice(length + 4);
-				// Recase it
-console.log("MESSAGE",length,type);
-				var suggestedTags = Buffer.from(suggestTags(data),"latin1");
-				// Send it back
-				var lengthBytes = Buffer.alloc(4);
-				lengthBytes.writeUInt32BE(suggestedTags.length + 1,0)
-console.log("RESPONSE",1,suggestedTags.length)
-				sock.write(lengthBytes);
-				var typeByte = Buffer.alloc(1);
-				typeByte.writeUInt8(1,0);
-				sock.write(typeByte);
-				sock.write(suggestedTags);
-			} else {
-				break;
-			}
-		}
-	});
-	sock.on("end",function() {
-		console.log("END")
-		sock.end();		
-	});
-	sock.on("close", function(data) {
-		console.log("CLOSED: " + sock.remoteAddress +" "+ sock.remotePort);
-	});
-});
-
-function suggestTags(str) {
-	var tags = [];
-	if(/e/mi.test(str)) {
-		tags.push("elephant");		
-	}
-	if(/s/mi.test(str)) {
-		tags.push("snake");		
-	}
-	if(/c/mi.test(str)) {
-		tags.push("cow");
-	}
-	return tags.join("\n");
-}

editions/externalpipesdemo/demo-tasks/mimic.js

@@ -1,109 +0,0 @@
-#!/usr/bin/env node
-
-/*
-Reads source text from stdin and mimics it to stdout to stdout using a simple statistical analysis of ngram frequency
-
-	mimic.js <ngram-length> <output-length>
-
-This utility is provided as an example of using an external task that doesn't have any prior knowledge of
-TiddlyWiki. Like many Unix utilities, it just reads input from stdin and writes its output to stdout.
-
-*/
-
-var paramNgramLength = parseInt(process.argv[2] || "",10) || 3, // Size of ngrams for mimicing
-	paramOutputLength = parseInt(process.argv[3] || "",10) || 1000;
-
-process.stdin.resume();
-process.stdin.setEncoding("utf8");
-var inputChunks = [];
-process.stdin.on("data",function(chunk) {
-	inputChunks.push(chunk);
-});
-process.stdin.on("end",function() {
-	// Do the mimicry
-	var output = mimic(inputChunks.join(""),paramNgramLength);
-	// Output the result
-	process.stdout.write(output);
-});
-
-function mimic(sourceText,paramNgramLength) {
-	if(!sourceText) {
-		return "";
-	}
-	var tree = {};
-	scanText(tree,sourceText,paramNgramLength);
-	return generateText(tree,sourceText,paramNgramLength,paramOutputLength);
-}
-
-/*
-The source text is scanned to build a tree of the ngram prefixes as follows:
-
-{
-	"abc": { // The ngram prefix described by this record
-		count: 42, // The number of times the prefix is found in the source text
-		next: [ // An array of information about each subsequent character encountered after the prefix
-			{char: "d", count: 41},
-			{char: " ", count: 1}
-		]
-	},
-	"def": ... etc
-}
-
-*/
-
-// Process the source text into the specified tree with the chosen ngram size
-function scanText(tree,sourceText,size) {
-	var currgram = [],ptr,c,ngram,branch,n;
-	if(sourceText.length <= size*2)
-		return tree;
-	sourceText += sourceText.substring(0,size*2-1); // Wrap the text around
-	for(ptr=0; ptr<size; ptr++) {
-		currgram.push(sourceText.substr(ptr,1));
-	}
-	while(ptr < sourceText.length) {
-		ngram = currgram.join("");
-		c = sourceText.substr(ptr++,1);
-		branch = tree[ngram];
-		if(branch === undefined) {
-			branch = tree[ngram] = {count: 0,next: []};
-		}
-		for(n = 0; n<branch.next.length; n++) {
-			if(branch.next[n].char === c)
-				break;
-		}
-		if(branch.next[n] === undefined) {
-			branch.next[n] = {char: c, count: 1};
-		} else {
-			branch.next[n].count++;
-		}
-		branch.count++;
-		currgram.push(c)
-		currgram.shift();
-	}
-	return tree;
-}
-
-// Use the tree to generate mimicry
-function generateText(tree,sourceText,size,length) {
-	var currgram = [];
-	for(var t=0; t<size; t++) {
-		currgram.push(sourceText.substr(t,1));
-	}
-	var result = [];
-	var c,ngram,branch,r,n;
-	for(t=0; t<length; t++) {
-		ngram = currgram.join("");
-		branch = tree[ngram];
-		n = 0;
-		r = Math.floor(Math.random() * branch.count);
-		while(r >= branch.next[n].count) {
-			r = r - branch.next[n].count;
-			n++;
-		}
-		c = branch.next[n].char;
-		result.push(c);
-		currgram.push(c)
-		currgram.shift();
-	}
-	return result.join("");
-}

editions/externalpipesdemo/demo-tasks/readme.md

@@ -1,3 +0,0 @@
-# Sample Processes for TiddlyWiki External Pipes
-
-"External Pipes" are connections enabling a wiki to communicate with an external process to perform arbitrary processing on a group of tiddlers.

editions/externalpipesdemo/demo-tasks/recase_erl.sh

@@ -1,39 +0,0 @@
-#!/usr/bin/env escript
-
-%% run with sh ./recase_erl.sh
-
--mode(compile).
-
-main(_) ->
-    {ok, Listen} = gen_tcp:listen(8081, [binary,{packet,4},
-					 {active,true}]),
-    spawn(fun() -> par_connect(Listen) end),
-    receive after infinity -> void end.
-		    
-par_connect(Listen) ->
-    {ok, Socket} = gen_tcp:accept(Listen),
-    io:format("connected ~n"),
-    spawn(fun() -> par_connect(Listen) end),
-    loop(Socket).
-
-loop(Socket) -> 
-    receive
-	{tcp,Socket,Bin} ->
-	    io:format("received ~p bytes ~s ~n",[size(Bin), Bin]),
-	    Return = recase_binary(Bin),
-	    io:format("sending: ~p bytes~n",[size(Return)]),
-	    gen_tcp:send(Socket, Return),
-	    loop(Socket);
-	Other ->
-	    io:format("received ~p~n",[Other])
-    end.
-
-recase_binary(<<1,B/binary>>) ->
-    L = binary_to_list(B),
-    L1 = [recase(I) || I <- L],
-    B1 = list_to_binary(L1),
-    <<1,B1/binary>>.
-
-recase(I) when I >= $a, I =< $z -> I - $a + $A;
-recase(I) when I >= $A, I =< $Z -> I - $A + $a;
-recase(I)                       -> I.

editions/externalpipesdemo/demo-tasks/recaser.js

@@ -1,77 +0,0 @@
-#!/usr/bin/env node
-
-/*
-A socket server that listens on a host/port for connections and reverses the case of incoming text
-
-	recaser.js <port> <host>
-
-This utility is provided as an example of using an external task that doesn't have any prior knowledge of
-TiddlyWiki. Like many Unix utilities, it just reads and writes to a socket.
-
-*/
-
-var net = require("net"),
-	port = parseInt(process.argv[2] || "",10) || 8081, // Port
-	host = process.argv[3] || "127.0.0.1"; // Host
-
-var server = net.createServer();
-
-server.listen(port,host);
-
-server.on("connection", function(sock) {
-	console.log("CONNECTED: " + sock.remoteAddress +":"+ sock.remotePort);
-	// Trap errors
-	sock.on("error",function(e) {
-		console.log("ERROR: " + e);
-	});
-	// Read data until the end
-	var accumulator = Buffer.alloc(0);
-	sock.on("data",function(data) {
-		console.log("DATA " + sock.remoteAddress + ": " + data.length);
-		accumulator = Buffer.concat([accumulator,Buffer.from(data)]);
-		while(accumulator.length > 4) {
-			var length = accumulator.readInt32BE(0);
-			if(accumulator.length >= (length + 4)) {
-				if(length < 1) {
-					throw "ERROR: Incoming message length field is less than 1";
-				}
-				var type = accumulator.readUInt8(4),
-					dataLength = length - 1,
-					data = accumulator.toString("latin1",5,dataLength + 5);
-				accumulator = accumulator.slice(length + 4);
-				// Recase it
-console.log("MESSAGE",length,type);
-				var recasedData = Buffer.from(recase(data),"latin1");
-				// Send it back
-				var lengthBytes = Buffer.alloc(4);
-				lengthBytes.writeUInt32BE(recasedData.length + 1,0)
-console.log("RESPONSE",1,recasedData.length)
-				sock.write(lengthBytes);
-				var typeByte = Buffer.alloc(1);
-				typeByte.writeUInt8(1,0);
-				sock.write(typeByte);
-				sock.write(recasedData);
-			} else {
-				break;
-			}
-		}
-	});
-	sock.on("end",function() {
-		console.log("END")
-		sock.end();		
-	});
-	sock.on("close", function(data) {
-		console.log("CLOSED: " + sock.remoteAddress +" "+ sock.remotePort);
-	});
-});
-
-function recase(str) {
-	return str.split("").map(function(char) {
-		if(char >= "A" && char <= "Z") {
-			return char.toLowerCase();
-		} else {
-			return char.toUpperCase();
-		}
-	}).join("");
-}
-

editions/externalpipesdemo/demo-tasks/reverser.js

@@ -1,49 +0,0 @@
-#!/usr/bin/env node
-
-/*
-A socket server that listens on a host/port for connections and reverses the order of incoming text
-
-	reverser.js <port> <host>
-
-This utility is provided as an example of using an external task that doesn't have any prior knowledge of
-TiddlyWiki. Like many Unix utilities, it just reads and writes to a socket.
-
-*/
-
-var net = require("net"),
-	port = parseInt(process.argv[2] || "",10) || 8081, // Port
-	host = process.argv[3] || "127.0.0.1"; // Host
-
-var server = net.createServer({
-	allowHalfOpen: true
-});
-
-server.listen(port,host);
-
-server.on("connection", function(sock) {
-	console.log("CONNECTED: " + sock.remoteAddress +":"+ sock.remotePort);
-	// Trap errors
-	sock.on("error",function(e) {
-		console.log("ERROR: " + e);
-	});
-	// Read data until the end
-	var chunks = [];
-	sock.on("data",function(data) {
-		console.log("DATA " + sock.remoteAddress + ": " + data);
-		chunks.push(data.toString());
-	});
-	sock.on("end",function() {
-		console.log("END")
-		// Write the data back to the socket
-		sock.write(reverse(chunks.join("")));
-		sock.end();		
-	});
-	sock.on("close", function(data) {
-		console.log("CLOSED: " + sock.remoteAddress +" "+ sock.remotePort);
-	});
-});
-
-function reverse(str) {
-	return str.split("").reverse().join("");
-}
-

editions/externalpipesdemo/demo-tasks/stats.js

@@ -1,82 +0,0 @@
-#!/usr/bin/env node
-
-/*
-Reads JSON tiddlers from stdin and outputs stats to stdout
-
-	stats.js
-
-This utility is provided as an example of an external task that understands tiddler objects encoded in JSON.
-
-It expects to read an array of tiddler objects from stdin in this format:
-
-	[
-		{
-			"title": "Tiddler Title",
-			"text": "Text of tiddler",
-			"tags": "MyTag [[My Other Tag]]"
-		},
-		...
-	]
-
-The output is in the same format.
-
-*/
-
-process.stdin.resume();
-process.stdin.setEncoding("utf8");
-var inputChunks = [];
-process.stdin.on("data",function(chunk) {
-	inputChunks.push(chunk);
-});
-process.stdin.on("end",function() {
-	// Read the JSON input
-	var json = inputChunks.join(""),
-		data;
-	try {
-		data = JSON.parse(json);
-	} catch(e) {
-		throw "Malformed JSON: " + e + "\n\n" + json;
-	}
-	// Compute some stats
-	var output = computeStats(data);
-	// Output the result
-	process.stdout.write(JSON.stringify(output));
-});
-
-function computeStats(tiddlers) {
-	var numTiddlers = tiddlers.length,
-		wordCount = 0,
-		wordFrequency = {};
-	tiddlers.forEach(function(tiddler) {
-	    var matches = (tiddler.text || "").match(/[A-Za-z0-9\u00c0-\u00d6\u00d8-\u00de\u00df-\u00f6\u00f8-\u00ff\u0150\u0170\u0151\u0171]+/g);
-	    if(matches) {
-	    	wordCount += matches.length;
-	    	matches.forEach(function(word) {
-	    		word = word.toLowerCase();
-	    		wordFrequency[word] = wordFrequency[word] || 0;
-	    		wordFrequency[word] += 1;
-	    	});
-	    }
-	});
-	var sortedWords = Object.keys(wordFrequency).sort(function(a,b) {
-		if(wordFrequency[a] > wordFrequency[b]) {
-			return -1;
-		} else if(wordFrequency[a] < wordFrequency[b]) {
-			return +1;
-		} else {
-			return 0;
-		}
-	});
-	// Output
-	return [
-		{
-			title: "PipeOutput",
-			text: numTiddlers + " tiddlers in sample.\n" + wordCount + " words in sample.\n" + sortedWords.filter(function(word) {
-				return word.length > 1 && wordFrequency[word] > 1;
-			}).map(function(word) {
-				return word + " " + wordFrequency[word] + "\n";
-			}).join(""),
-			type: "text/plain"
-		}
-	];
-};

editions/externalpipesdemo/tiddlers/Alice in Wonderland License.tid

@@ -1,360 +0,0 @@
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editions/externalpipesdemo/tiddlers/EditorToolbar/SuggestTags.tid

@@ -1,15 +0,0 @@
-title: $:/plugins/tiddlywiki/externaltasksdemo/EditorToolbar/SuggestTags
-tags: $:/tags/EditorToolbar
-icon: $:/core/images/tag-button
-caption: Suggest Tags
-description: Invoke external programme to suggest tags for this tiddler
-condition: [<targetTiddler>!has[type]] [<targetTiddler>type[text/vnd.tiddlywiki]]
-button-classes: tc-text-editor-toolbar-item-start-group
-shortcuts: ((suggest-tags))
-dropdown: $:/plugins/tiddlywiki/externaltasksdemo/EditorToolbar/SuggestTagsDropdown
-
-<$set name="inputFilter" filter="[<targetTiddler>]">
-<$action-sendmessage $message="tm-execute-job" 1="--pipe" 2="badtagger" 3=<<inputFilter>> 4="PipeOutput" statusTitle="JobStatus"/>
-</$set>
-Suggest Tags - <$text text=<<targetTiddler>>/>
-

editions/externalpipesdemo/tiddlers/EditorToolbar/SuggestTagsDropdown.tid

@@ -1,7 +0,0 @@
-title: $:/plugins/tiddlywiki/externaltasksdemo/EditorToolbar/SuggestTagsDropdown
-
-<$button message="tm-server-refresh">Refresh</$button>
-
-Status: {{JobStatus}} {{JobStatus!!message}}
-
-Results: {{PipeOutput}}

editions/externalpipesdemo/tiddlers/Sample Text.tid

@@ -1,6 +0,0 @@
-title: Sample Text
-
-Aliquo déditum habet huius, non tempora. Affectus captet declarant retinere támque. Desiderabile dolor posuit státim uterque. 
-
-Arbitraretur civium epicureum extremo, gerendarum málá pacuvii. Accumsan alteram amaret conclusionémqué definitiones événiunt firmám homo noctesque quibus refert triá utens. Chóró egestas fugiamus fuissent, impénsa littéras magna ménté quia scientiam sensibus tibi. Bonas eas fieri i, lacinia legantur oratione urbes. 
-

editions/externalpipesdemo/tiddlers/system/DefaultTiddlers.tid

@@ -1,3 +0,0 @@
-title: $:/DefaultTiddlers
-
-HelloThere

editions/externalpipesdemo/tiddlers/system/HelloThere.tid

@@ -1,54 +0,0 @@
-title: HelloThere
-
-! External Pipe Demos
-
-Note that the browser polls the server every {{$:/config/SyncPollingInterval}}ms. You can trigger an instaneous poll:  <$button message="tm-server-refresh">Refresh</$button>
-
-Status: {{JobStatus}} {{JobStatus!!message}}
-
-!! Reverser
-
-This demo requires the example task `reverser.js 8081` to be running in a separate command window. You can edit the [[Sample Text]].
-
-<$button>
-<$action-sendmessage $message="tm-execute-job" 1="--pipe" 2="reverser" 3="[[Sample Text]]" 4="PipeOutput" statusTitle="JobStatus"/>
-Reverser
-</$button>
-
-!! Recaser
-
-This demo requires the example task `./recaser.js 8081` or `./recase_erl.sh` to be running in a separate command window. You can edit the [[Sample Text]].
-
-<$button>
-<$action-sendmessage $message="tm-execute-job" 1="--pipe" 2="recaser" 3="[[Sample Text]]" 4="PipeOutput" statusTitle="JobStatus"/>
-Recaser
-</$button>
-
-!! Tagger
-
-This demo requires the example task `./badtagger.js 8081` to be running in a separate command window. You can edit the [[Sample Text]].
-
-<$button>
-<$action-sendmessage $message="tm-execute-job" 1="--pipe" 2="badtagger" 3="[[Sample Text]]" 4="PipeOutput" statusTitle="JobStatus"/>
-Tagger
-</$button>
-
-!! Mimic
-
-<$button>
-<$action-sendmessage $message="tm-execute-job" 1="--pipe" 2="mimic" 3="[[Alice in Wonderland]]" 4="PipeOutput" 5="5" 6="5000" statusTitle="JobStatus"/>
-Mimic
-</$button>
-
-!! Stats
-
-<$button>
-<$action-sendmessage $message="tm-execute-job" 1="--pipe" 2="stats" 3="[[Alice in Wonderland]]" 4="PipeOutput" statusTitle="JobStatus"/>
-Stats
-</$button>
-
-!! Demo Output
-
-The output generated by the demos appears here:
-
-{{PipeOutput}}

editions/externalpipesdemo/tiddlers/system/SyncPollingInterval.tid

@@ -1,2 +0,0 @@
-title: $:/config/SyncPollingInterval
-text: 5000

editions/externalpipesdemo/tiddlywiki.info

@@ -1,119 +0,0 @@
-{
-	"description": "Edition demonstrating external pipes",
-	"plugins": [
-		"tiddlywiki/tiddlyweb"
-	],
-	"themes": [
-		"tiddlywiki/vanilla",
-		"tiddlywiki/snowwhite"
-	],
-	"build": {
-		"index": [
-			"--rendertiddler","$:/core/save/all","index.html","text/plain"]
-	},
-	"config": {
-		"allow-remote-commands": true
-	},
-	"external-pipes": {
-		"reverser": {
-			"type": "socket",
-			"host": "127.0.0.1",
-			"port": 8081,
-			"input": {
-				"format": "rendered-text"
-			},
-			"output": {
-				"format": "text",
-				"tiddler": {
-					"title": "PipeOutput",
-					"type": "text/plain"
-				}
-			},
-			"environment": {
-				"MY_VARIABLE": "value"
-			},
-			"timeout": 100
-		},
-		"stats": {
-			"type": "task",
-			"path": "./demo-tasks/stats.js",
-			"input": {
-				"format": "json-raw-tiddlers"
-			},
-			"output": {
-				"format": "json-raw-tiddlers"
-			},
-			"error": {
-				"format": "text",
-				"tiddler": {
-					"title": "PipeOutput",
-					"type": "text/plain",
-					"result": "error"
-				}
-			},
-			"environment": {
-				"MY_VARIABLE": "value"
-			},
-			"timeout": 100
-		},
-		"mimic": {
-			"type": "task",
-			"path": "./demo-tasks/mimic.js",
-			"arguments": ["ngram-length"],
-			"input": {
-				"format": "rendered-text"
-			},
-			"output": {
-				"format": "text",
-				"tiddler": {
-					"title": "PipeOutput",
-					"type": "text/plain"
-				}
-			},
-			"environment": {
-				"MY_VARIABLE": "value"
-			},
-			"timeout": 100
-		},
-		"recaser": {
-			"type": "socket-erlang",
-			"host": "127.0.0.1",
-			"port": 8081,
-			"encoding": "latin1",
-			"input": {
-				"format": "rendered-text"
-			},
-			"output": {
-				"format": "text",
-				"tiddler": {
-					"title": "PipeOutput",
-					"type": "text/plain"
-				}
-			},
-			"environment": {
-				"MY_VARIABLE": "value"
-			},
-			"timeout": 100
-		},
-		"badtagger": {
-			"type": "socket-erlang",
-			"host": "127.0.0.1",
-			"port": 8081,
-			"encoding": "latin1",
-			"input": {
-				"format": "rendered-text"
-			},
-			"output": {
-				"format": "text",
-				"tiddler": {
-					"title": "PipeOutput",
-					"type": "text/plain"
-				}
-			},
-			"environment": {
-				"MY_VARIABLE": "value"
-			},
-			"timeout": 100
-		}
-	}
-}

editions/fr-FR/tiddlers/HelloThumbnail - Latest Version.tid

@@ -2,7 +2,7 @@ caption: Quoi de neuf dans <<version>>
 color: #fff
 created: 20160603124050989
 fr-title: BonjourLaVignette - Dernière Version
-image: New Release Banner.png
+image: New Release Banner
 link: Releases
 modified: 20160603124131122
 tags: HelloThumbnail

editions/prerelease/tiddlers/Release 5.2.2.tid

@@ -1,22 +1,24 @@
-caption: 5.2.1
-created: 20211003152250369
-modified: 20211003152250369
+caption: 5.2.2
+created: 20211208115905247
+modified: 20211208115905247
 tags: ReleaseNotes
-title: Release 5.2.1
+title: Release 5.2.2
 type: text/vnd.tiddlywiki
 
 \define contributor(username)
 <a href="https://github.com/$username$" style="text-decoration:none;font-size:24px;" class="tc-tiddlylink-external" target="_blank" rel="noopener noreferrer"><img src="https://github.com/$username$.png?size=32" width="32" height="32"/> @<$text text=<<__username__>>/></a>
 \end
 
-//[[See GitHub for detailed change history of this release|https://github.com/Jermolene/TiddlyWiki5/compare/v5.2.0...master]]//
+//[[See GitHub for detailed change history of this release|https://github.com/Jermolene/TiddlyWiki5/compare/v5.2.1...master]]//
 
 ! Highlights
 
-! Performance Improvements
-
 * 
 
+! Bug Fixes
+
+*
+
 ! Usability Improvements
 
 * 
@@ -33,7 +35,7 @@ type: text/vnd.tiddlywiki
 
 * 
 
-! Client-server Improvements
+! Developer Improvements
 
 * 
 
@@ -41,20 +43,10 @@ type: text/vnd.tiddlywiki
 
 * 
 
-! Plugin Improvements
-
-! Developer Experience Improvements
-
-* 
-
 ! Translation improvements
 
 * 
 
-! Other Bug Fixes
-
-* 
-
 ! Acknowledgements
 
 [[@Jermolene|https://github.com/Jermolene]] would like to thank the contributors to this release who have generously given their time to help improve TiddlyWiki:

editions/test/tiddlers/tests/test-filters.js

@@ -815,6 +815,10 @@ Tests the filtering mechanism.
 			expect(wiki.filterTiddlers("[[Unlike conventional online services, TiddlyWiki lets you choose where to keep your data\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data]search-replace:g:regexp<myregexp2>,[]]",anchorWidget).join(",")).toBe("conventional online services, TiddlyWiki lets you choose where to keep your data\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data");
 			expect(wiki.filterTiddlers("[[Unlike conventional online services, TiddlyWiki lets you choose where to keep your data\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data]search-replace:gm:regexp<myregexp2>,[]]",anchorWidget).join(",")).toBe("conventional online services, TiddlyWiki lets you choose where to keep your data\nconventional online services, TiddlyWiki lets you choose where to keep your data\nconventional online services, TiddlyWiki lets you choose where to keep your data\nconventional online services, TiddlyWiki lets you choose where to keep your data");
 			expect(wiki.filterTiddlers("[[Hello There\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data\nguaranteeing that in the decades to come you will still be able to use the notes you take today.]search-replace:gm:regexp<myregexp3>,[]]",anchorWidget).join(",")).toBe("\nUnlike conventional online services, TiddlyWiki lets you choose where to keep your data\n");
+			expect(wiki.filterTiddlers("[[This is equation $$x$$ end.]search-replace[equation $$x$$ end.],[relation $$x$$ finish.]]").join(",")).toBe("This is relation $$x$$ finish.");
+			expect(wiki.filterTiddlers("[[This is an amazing TiddlyWiki]] [[How old is TiddlyWiki?. TiddlyWiki is great]] [[My TiddlyWiki is so fast.]] +[search-replace:g:regexp[TiddlyWiki],[TW]]").join(",")).toBe("This is an amazing TW,How old is TW?. TW is great,My TW is so fast.");
+			expect(wiki.filterTiddlers("[[This is an amazing TiddlyWiki]] [[How old is TiddlyWiki?. TiddlyWiki is great]] [[My TiddlyWiki is so fast.]] +[search-replace::regexp[TiddlyWiki],[TW]]").join(",")).toBe("This is an amazing TW,How old is TW?. TiddlyWiki is great,My TW is so fast.");
+			expect(wiki.filterTiddlers("[[This is an amazing TiddlyWiki]] [[How old is TiddlyWiki?. TiddlyWiki is great]] [[My TiddlyWiki is so fast.]] +[search-replace:g[TiddlyWiki],[TW]]").join(",")).toBe("This is an amazing TW,How old is TW?. TW is great,My TW is so fast.");
 		});
 		
 		it("should handle the pad operator", function() {

editions/test/tiddlers/tests/test-prefixes-filter.js

@@ -288,6 +288,38 @@ describe("'reduce' and 'intersection' filter prefix tests", function() {
 		tags: ["cakes","with tea"],
 		text: "Does anyone eat pound cake?"
 	});
+	wiki.addTiddler({
+		title: "$:/filter1",
+		text: "[tag[cakes]then[It is customary]]",
+		tags: "$:/tags/Filter $:/tags/SecondFilter"
+	});
+	wiki.addTiddler({
+		title: "$:/filter2",
+		text: "[<currentTiddler>tag[shopping]then[It is not customary]]",
+		tags: "$:/tags/Filter $:/tags/SecondFilter"
+	});
+	wiki.addTiddler({
+		title: "$:/filter3",
+		text: "[[Just a default]]",
+		tags: "$:/tags/Filter"
+	});
+	wiki.addTiddler({
+		title: "$:/tags/Filter",
+		list: "$:/filter1 $:/filter2 $:/filter3"
+	});
+	wiki.addTiddler({
+		title: "$:/tags/SecondFilter",
+		list: "$:/filter1 $:/filter2"
+	});
+	
+	it("should handle the :cascade filter prefix", function() {
+		expect(wiki.filterTiddlers("[[Rice Pudding]] :cascade[all[shadows+tiddlers]tag[$:/tags/Filter]get[text]]").join(",")).toBe("It is not customary");
+		expect(wiki.filterTiddlers("[[chocolate cake]] :cascade[all[shadows+tiddlers]tag[$:/tags/Filter]get[text]]").join(",")).toBe("It is customary");
+		expect(wiki.filterTiddlers("[[Sparkling water]] :cascade[all[shadows+tiddlers]tag[$:/tags/Filter]get[text]]").join(",")).toBe("Just a default");
+		expect(wiki.filterTiddlers("[[Rice Pudding]] :cascade[all[shadows+tiddlers]tag[$:/tags/SecondFilter]get[text]]").join(",")).toBe("It is not customary");
+		expect(wiki.filterTiddlers("[[chocolate cake]] :cascade[all[shadows+tiddlers]tag[$:/tags/SecondFilter]get[text]]").join(",")).toBe("It is customary");
+		expect(wiki.filterTiddlers("[[Sparkling water]] :cascade[all[shadows+tiddlers]tag[$:/tags/SecondFilter]get[text]]").join(",")).toBe("");
+	});
 
 	it("should handle the :reduce filter prefix", function() {
 		expect(wiki.filterTiddlers("[tag[shopping]] :reduce[get[quantity]add<accumulator>]").join(",")).toBe("22");
@@ -384,6 +416,24 @@ describe("'reduce' and 'intersection' filter prefix tests", function() {
 		expect(wiki.filterTiddlers("[tag[shopping]] :map[get[description]else{!!title}]").join(",")).toBe("A square of rich chocolate cake,a round yellow seed,Milk,Rice Pudding");
 		// Return the first title from :map if the filter returns more than one result
 		expect(wiki.filterTiddlers("[tag[shopping]] :map[tags[]]").join(",")).toBe("shopping,shopping,shopping,shopping");
+		// Prepend the position in the list using the index and length variables
+		expect(wiki.filterTiddlers("[tag[shopping]] :map[get[title]addprefix[-]addprefix<length>addprefix[of]addprefix<index>]").join(",")).toBe("0of4-Brownies,1of4-Chick Peas,2of4-Milk,3of4-Rice Pudding");
+	});
+
+	it("should handle macro parameters for filter run prefixes",function() {
+		var widget = require("$:/core/modules/widgets/widget.js");
+		var rootWidget = new widget.widget({ type:"widget", children:[ {type:"widget", children:[]} ] },
+										   { wiki:wiki, document:$tw.document});
+		rootWidget.makeChildWidgets();
+		var anchorWidget = rootWidget.children[0];
+		rootWidget.setVariable("greet","Hello $name$",[{name:"name"}],true);
+		rootWidget.setVariable("echo","$text$",[{name:"text"}],true);
+		// :map prefix
+		expect(wiki.filterTiddlers("1 :map[subfilter<greet Tom>join[ ]]",anchorWidget).join(",")).toBe("Hello Tom");
+		expect(wiki.filterTiddlers('[tag[shopping]] :map[<echo "$(index)$ $(currentTiddler)$">]',anchorWidget).join(",")).toBe("0 Brownies,1 Chick Peas,2 Milk,3 Rice Pudding");
+		// :reduce prefix
+		expect(wiki.filterTiddlers("1 :reduce[subfilter<greet Tom>join[ ]]",anchorWidget).join(",")).toBe("Hello Tom");
+		expect(wiki.filterTiddlers('[tag[shopping]] :reduce[<echo "$(accumulator)$ $(index)$ $(currentTiddler)$,">]',anchorWidget).join(",")).toBe(" 0 Brownies, 1 Chick Peas, 2 Milk, 3 Rice Pudding,");
 	});
 });
 

editions/test/tiddlers/tests/test-widget.js

@@ -247,6 +247,40 @@ describe("Widget module", function() {
 		expect(wrapper.children[0].children[2].sequenceNumber).toBe(4);
 	});
 
+	it("should deal with the let widget", function() {
+		var wiki = new $tw.Wiki();
+		wiki.addTiddlers([
+			{title: "TiddlerOne", text: "lookup"},
+			{title: "TiddlerTwo", lookup: "value", newlookup: "value", wrong: "wrong"},
+			{title: "TiddlerThree", text: "wrong", value: "Happy Result", wrong: "ALL WRONG!!"}
+		]);
+		var text="\\define macro() TiddlerThree\n"+
+			"\\define currentTiddler() TiddlerOne\n"+
+			"<$let "+
+				"field={{!!text}} "+
+				"currentTiddler='TiddlerTwo' "+
+				"field={{{ [all[current]get<field>] }}} "+
+				"currentTiddler=<<macro>>>"+
+					"<$transclude field=<<field>>/></$let>";
+		var widgetNode = createWidgetNode(parseText(text,wiki),wiki);
+		var wrapper = renderWidgetNode(widgetNode);
+		expect(wrapper.innerHTML).toBe("<p>Happy Result</p>");
+
+		// This is important. $Let needs to be aware enough not to let its
+		// own variables interfere with its ability to recognize no change.
+		// Doesn't matter that nothing has changed, we just need to make sure
+		// it recognizes that that its outward facing variables are unchanged
+		// EVEN IF some intermediate variables did change, there's no need to
+		// refresh.
+		wiki.addTiddler({title: "TiddlerOne", text: "newlookup"});
+		expect(widgetNode.refresh({})).toBe(false);
+
+		// But if we make a change that might result in different outfacing
+		// variables, then it should refresh
+		wiki.addTiddler({title: "TiddlerOne", text: "badlookup"});
+		expect(widgetNode.refresh({})).toBe(true);
+	});
+
 	it("should deal with attributes specified as macro invocations", function() {
 		var wiki = new $tw.Wiki();
 		// Construct the widget node

editions/tw5.com/tiddlers/$__StoryList.tid

@@ -1,5 +1,5 @@
-created: 20210322152203906
-list: [[Documentation Macros]] HelloThere GettingStarted Community
-modified: 20210322152237613
+created: 20211126104006194
+list: [[Page and tiddler layout customisation]] [[Creating new buttons for the ViewToolbar and page controls]] [[Structuring TiddlyWiki]] Tagging [[Introduction to Lists]] [[Icon Gallery]] [[How to widen tiddlers (aka storyriver)]] [[How to turn off camel case linking]] [[How to put the last modification date in a banner]] [[How to hide the author's and other fields with CSS]] [[How to export tiddlers]] [[How to Customize TiddlyDesktop]] [[Editing Tiddlers with Vim]] [[Concatenating text and variables using macro substitution]] [[Demonstration: keyboard-driven-input Macro]] HelloThere GettingStarted Community
+modified: 20211126111221917
 title: $:/StoryList
 type: text/vnd.tiddlywiki

editions/tw5.com/tiddlers/WidgetMessage_ tm-execute-job.tid

@@ -1,24 +0,0 @@
-caption: tm-execute-job
-created: 20181017140932589
-modified: 20181017171440568
-tags: Messages
-title: WidgetMessage: tm-execute-job
-type: text/vnd.tiddlywiki
-
-<<.from-version "5.1.18">> The "execute job" message triggers the execution of [[remote commands|Using remote commands]]. It uses the message parameters as follows:
-
-|!Name |!Description |
-|$param |Not used |
-|commands |Command string to be executed |
-|0...n |Command tokens to be executed |
-|statusTitle |Optional title of tiddler in which to store status updates as the commands are executed |
-
-Note that the command string to be executed can either be passed as a single string, or as a sequence of tokens:
-
-* A single string:
-*> `<$action-sendmessage $message="tm-execute-job" commands="--version"/>`
-* Separate command tokens with numeric indices:
-*> `<$action-sendmessage $message="tm-execute-job" 0="--version" 1="--version"/>`
-** Note that the numeric indices must be non-negative integers with no leading zeros
-
-The "execute job" message is handled by the TiddlyWiki core SyncMechanism which invokes the current [[SyncAdaptorModule|SyncAdaptorModules]] (typically the ''tiddlywiki/tiddlywebadaptor'' plugin).

editions/tw5.com/tiddlers/commands/NamedCommandParameters.tid

@@ -1,6 +1,6 @@
 created: 20180626122427188
-modified: 20180626134639673
-tags: [[Using TiddlyWiki on Node.js]]
+modified: 20211117234223960
+tags: [[TiddlyWiki on Node.js]]
 title: NamedCommandParameters
 type: text/vnd.tiddlywiki
 

editions/tw5.com/tiddlers/community/Contributing.tid

@@ -1,5 +1,5 @@
 created: 20131101111400000
-modified: 20210402095728684
+modified: 20211115092001000
 tags: Community
 title: Contributing
 type: text/vnd.tiddlywiki
@@ -45,7 +45,7 @@ PR titles may also include a short prefix to indicate the subsystem to which the
 
 ! Commenting on Pull Requests
 
-One of the principles of open source is that many pairs of eyes on the code can improve quality. So, we welcome comments and critiques of pending PRs. [[Conventional Comments|https://conventionalcomments.org]] has some techcniques to help make comments as constructive and actionable as possible. Notably, they recommend prefixing a comment with a label to clarify the intention:
+One of the principles of open source is that many pairs of eyes on the code can improve quality. So, we welcome comments and critiques of pending PRs. [[Conventional Comments|https://conventionalcomments.org]] has some techniques to help make comments as constructive and actionable as possible. Notably, they recommend prefixing a comment with a label to clarify the intention:
 
 |praise |Praises highlight something positive. Try to leave at least one of these comments per review. Do not leave false praise (which can actually be damaging). Do look for something to sincerely praise |
 |nitpick |Nitpicks are small, trivial, but necessary changes. Distinguishing nitpick comments significantly helps direct the reader's attention to comments requiring more involvement |

editions/tw5.com/tiddlers/community/TW Icons by morosanuae.tid

@@ -1,6 +1,6 @@
 created: 20210204010508263
-modified: 20210204010941713
-tags: Images SVG Icons
+modified: 20211113225941563
+tags: Images SVG Icons [[Other Resources]]
 title: "TW Icons" by morosanuae
 type: text/vnd.tiddlywiki
 url: https://morosanuae.github.io/tw-icons

editions/tw5.com/tiddlers/community/TiddlyWiki Hangouts.tid

@@ -1,10 +1,10 @@
 created: 20130823091700000
-modified: 20140912150339263
+modified: 20211124214214045
 tags: Community Videos
 title: TiddlyWiki Hangouts
 type: text/vnd.tiddlywiki
 
-The TiddlyWiki community holds regular Google Hangouts, usually every Tuesday from 4pm to 6pm (UK time). They are announced in the [[TiddlyWiki Google group|https://groups.google.com/d/forum/tiddlywiki]] and on the [[TiddlyWiki Twitter account|https://twitter.com/TiddlyWiki]].
+The TiddlyWiki community has held many Google Hangouts over the years. They are announced in the [[TiddlyWiki Google group|https://groups.google.com/d/forum/tiddlywiki]] and on the [[TiddlyWiki Twitter account|https://twitter.com/TiddlyWiki]].
 
 Past Hangouts are archived in this ~YouTube playlist:
 

editions/tw5.com/tiddlers/community/editions/_Noteself_ by Danielo Rodriguez.tid

@@ -5,8 +5,8 @@ created: 20141122093837330
 delivery: Web Service
 description: Free online service that you can also host yourself
 method: sync
-modified: 20210106151027179
-tags: Android Chrome Firefox [[Internet Explorer]] Linux Mac Opera PHP [[Other resources]] Safari Saving Windows iOS Edge [[Community Editions]]
+modified: 20211113010826610
+tags: Android Chrome Firefox [[Internet Explorer]] Linux Mac Opera PHP Safari Saving Windows iOS Edge [[Community Editions]] [[Other Resources]]
 title: "Noteself" by Danielo Rodríguez
 type: text/vnd.tiddlywiki
 url: https://noteself.github.io/