Add support for filtering shadow tiddlers

core/modules/filters.js

@@ -106,7 +106,13 @@ exports.operators = {
 					}
 					break;
 				case "system":
-					return "for(title in source) {if(" + op + "this.getTiddler(title).isSystem()) {$tw.utils.pushTop(subResults,title);}}";
+					return "for(title in source) {if(" + op + "this.isSystemTiddler(title)) {$tw.utils.pushTop(subResults,title);}}";
+				case "shadow":
+					if(operator.prefix === "!") {
+						return "for(title in source) {if(!this.isShadowTiddler(title)) {$tw.utils.pushTop(subResults,title);}}";
+					} else {
+						return "for(title in this.shadowTiddlers) {$tw.utils.pushTop(subResults,title);}";
+					}
 				case "missing":
 					if(operator.prefix === "!") {
 						return "for(title in source) {$tw.utils.pushTop(subResults,title);}";
@@ -134,7 +140,9 @@ exports.operators = {
 					}
 					break;
 				case "system":
-					return "for(r=subResults.length-1; r>=0; r--) {if(" + op + "this.getTiddler(subResults[r]).isSystem()) {subResults.splice(r,1);}}";
+					return "for(r=subResults.length-1; r>=0; r--) {if(" + op + "this.isSystemTiddler(subResults[r])) {subResults.splice(r,1);}}";
+				case "shadow":
+					return "for(r=subResults.length-1; r>=0; r--) {if(" + op + "this.isShadowTiddler(subResults[r])) {subResults.splice(r,1);}}";
 				case "missing":
 					return "t = this.getMissingTitles(); for(r=subResults.length-1; r>=0; r--) {if(" + op + "!$tw.utils.hop(t,subResults[r])) {subResults.splice(r,1);}}";
 				case "orphan":

core/modules/tiddler.js

@@ -16,17 +16,6 @@ exports.hasTag = function(tag) {
 	return this.fields.tags && this.fields.tags.indexOf(tag) !== -1;
 };
 
-exports.isSystem = function() {
-	if(!$tw.utils.hop(this,"systemFlag")) {
-		this.systemFlag = this.fields.title.indexOf("$:/") === 0;
-	}
-	return this.systemFlag;
-};
-
-exports.isTemporary = function() {
-	return this.fields.title.indexOf("$:/temp/") === 0;
-};
-
 exports.getFieldString = function(field) {
 	var value = this.fields[field];
 	// Check for a missing field

core/modules/widgets/link.js

@@ -37,6 +37,7 @@ LinkWidget.prototype.generate = function() {
 	this.isExternal = isLinkExternal(this.to);
 	if(!this.isExternal) {
 		this.isMissing = !this.renderer.renderTree.wiki.tiddlerExists(this.to);
+		this.isShadow = this.renderer.renderTree.wiki.isShadowTiddler(this.to);
 	}
 	// Compose the link
 	var classes = ["tw-tiddlylink"]
@@ -44,10 +45,15 @@ LinkWidget.prototype.generate = function() {
 		$tw.utils.pushTop(classes,"tw-tiddlylink-external");
 	} else {
 		$tw.utils.pushTop(classes,"tw-tiddlylink-internal");
-		if(this.isMissing) {
+		if(this.isShadow) {
+			$tw.utils.pushTop(classes,"tw-tiddlylink-shadow");
+		}
+		if(this.isMissing && !this.isShadow) {
 			$tw.utils.pushTop(classes,"tw-tiddlylink-missing");
 		} else {
-			$tw.utils.pushTop(classes,"tw-tiddlylink-resolves");
+			if(!this.isMissing) {
+				$tw.utils.pushTop(classes,"tw-tiddlylink-resolves");
+			}
 		}
 	}
 	var events = [{name: "click", handlerObject: this, handlerMethod: "handleClickEvent"}];

core/modules/widgets/transclude.js

@@ -98,7 +98,7 @@ TranscludeWidget.prototype.generate = function() {
 	if(this.renderer.hasAttribute("class")) {
 		$tw.utils.pushTop(classes,this.renderer.getAttribute("class").split(" "));
 	}
-	if(!this.renderer.renderTree.wiki.tiddlerExists(this.targetTitle)) {
+	if(!this.renderer.renderTree.wiki.tiddlerExists(this.targetTitle) && !this.renderer.renderTree.wiki.isShadowTiddler(this.targetTitle)) {
 		$tw.utils.pushTop(classes,"tw-tiddler-missing");
 	}
 	// Create the renderers for the wrapper and the children

core/modules/wiki.js

@@ -164,6 +164,18 @@ exports.tiddlerExists = function(title) {
 	return !!this.tiddlers[title];
 };
 
+exports.isSystemTiddler = function(title) {
+	return title.indexOf("$:/") === 0;
+};
+
+exports.isTemporaryTiddler = function(title) {
+	return title.indexOf("$:/temp/") === 0;
+};
+
+exports.isShadowTiddler = function(title) {
+	return $tw.utils.hop(this.shadowTiddlers,title);
+};
+
 exports.addTiddler = function(tiddler) {
 	// Check if we're passed a fields hashmap instead of a tiddler
 	if(!(tiddler instanceof $tw.Tiddler)) {
@@ -184,7 +196,7 @@ exports.getTiddlers = function(sortField,excludeTag) {
 	sortField = sortField || "title";
 	var tiddlers = [], t, titles = [];
 	for(t in this.tiddlers) {
-		if($tw.utils.hop(this.tiddlers,t) && !this.tiddlers[t].isSystem() && (!excludeTag || !this.tiddlers[t].hasTag(excludeTag))) {
+		if($tw.utils.hop(this.tiddlers,t) && !this.isSystemTiddler(t) && (!excludeTag || !this.tiddlers[t].hasTag(excludeTag))) {
 			tiddlers.push(this.tiddlers[t]);
 		}
 	}
@@ -344,7 +356,7 @@ exports.getOrphanTitles = function() {
 exports.getSystemTitles = function() {
 	var titles = [];
 	for(var title in this.tiddlers) {
-		if(this.tiddlers[title].isSystem()) {
+		if(this.isSystemTiddler(title)) {
 			titles.push(title);
 		}
 	}
@@ -352,6 +364,15 @@ exports.getSystemTitles = function() {
 	return titles;
 };
 
+exports.getShadowTitles = function() {
+	var titles = [];
+	for(var title in this.shadowTiddlers) {
+		titles.push(title);
+	}
+	titles.sort();
+	return titles;
+};
+
 /*
 Retrieves a list of the tiddler titles that are tagged with a given tag
 */