Basics of single tiddler mode

* Storyviews expose a static "singleTiddlerMode" property to determine if they require single tiddler mode
* Navigator widget adds a "singleTiddlerMode" attribute; when set to "yes", the story list is entirely replaced during navigation
* Navigator widget now updates "list" field of $:/HistoryList with a more accessible version of the history list
* Add a getstoryviewsingletiddlermode[] operator so that we can obtain the story view STM status for passing to the navigator widget

core/modules/filters/getstoryviewsingletiddlermode.js

@@ -0,0 +1,35 @@
+/*\
+title: $:/core/modules/filters/getstoryviewsingletiddlermode.js
+type: application/javascript
+module-type: filteroperator
+
+Filter operator for retrieving the single tiddler mode status of a storyview.
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Export our filter functions
+*/
+
+exports.getstoryviewsingletiddlermode = function(source,operator,options) {
+	// Initialise the storyviews if they've not been done already
+	var storyviews = {};
+	$tw.modules.applyMethods("storyview",storyviews);
+	var results = [];
+	source(function(tiddler,title) {
+		var storyview = storyviews[title];
+		if(storyview && storyview.singleTiddlerMode) {
+			results.push("yes");			
+		} else {
+			results.push("no");
+		}
+	});
+	return results;
+};
+
+})();

core/modules/story.js

@@ -37,44 +37,48 @@ Story.prototype.getStoryList = function() {
 Story.prototype.addToStory = function(navigateTo,navigateFromTitle,options) {
 	options = options || {};
 	var storyList = this.getStoryList();
-	// See if the tiddler is already there
-	var slot = storyList.indexOf(navigateTo);
-	// Quit if it already exists in the story river
-	if(slot >= 0) {
-		return;
-	}
-	// First we try to find the position of the story element we navigated from
-	var fromIndex = storyList.indexOf(navigateFromTitle);
-	if(fromIndex >= 0) {
-		// The tiddler is added from inside the river
-		// Determine where to insert the tiddler; Fallback is "below"
-		switch(options.openLinkFromInsideRiver) {
-			case "top":
-				slot = 0;
-				break;
-			case "bottom":
-				slot = storyList.length;
-				break;
-			case "above":
-				slot = fromIndex;
-				break;
-			case "below": // Intentional fall-through
-			default:
-				slot = fromIndex + 1;
-				break;
-		}
+	if(options.singleTiddlerMode) {
+		storyList = [navigateTo];
 	} else {
-		// The tiddler is opened from outside the river. Determine where to insert the tiddler; default is "top"
-		if(options.openLinkFromOutsideRiver === "bottom") {
-			// Insert at bottom
-			slot = storyList.length;
-		} else {
-			// Insert at top
-			slot = 0;
+		// See if the tiddler is already there
+		var slot = storyList.indexOf(navigateTo);
+		// Quit if it already exists in the story river
+		if(slot >= 0) {
+			return;
 		}
+		// First we try to find the position of the story element we navigated from
+		var fromIndex = storyList.indexOf(navigateFromTitle);
+		if(fromIndex >= 0) {
+			// The tiddler is added from inside the river
+			// Determine where to insert the tiddler; Fallback is "below"
+			switch(options.openLinkFromInsideRiver) {
+				case "top":
+					slot = 0;
+					break;
+				case "bottom":
+					slot = storyList.length;
+					break;
+				case "above":
+					slot = fromIndex;
+					break;
+				case "below": // Intentional fall-through
+				default:
+					slot = fromIndex + 1;
+					break;
+			}
+		} else {
+			// The tiddler is opened from outside the river. Determine where to insert the tiddler; default is "top"
+			if(options.openLinkFromOutsideRiver === "bottom") {
+				// Insert at bottom
+				slot = storyList.length;
+			} else {
+				// Insert at top
+				slot = 0;
+			}
+		}
+		// Add the tiddler
+		storyList.splice(slot,0,navigateTo);
 	}
-	// Add the tiddler
-	storyList.splice(slot,0,navigateTo);
 	// Save the story
 	this.saveStoryList(storyList);
 };
@@ -93,11 +97,20 @@ Story.prototype.saveStoryList = function(storyList) {
 Story.prototype.addToHistory = function(navigateTo,navigateFromClientRect) {
 	var titles = $tw.utils.isArray(navigateTo) ? navigateTo : [navigateTo];
 	// Add a new record to the top of the history stack
-	var historyList = this.wiki.getTiddlerData(this.historyTitle,[]);
+	var historyList = this.wiki.getTiddlerData(this.historyTitle,[]),
+		historyTitles = this.wiki.getTiddlerList(this.historyTitle);
 	$tw.utils.each(titles,function(title) {
 		historyList.push({title: title, fromPageRect: navigateFromClientRect});
+		var p;
+		do {
+			p = historyTitles.indexOf(title);
+			if(p !== -1) {
+				historyTitles.splice(p,1);
+			}
+		} while(p !== -1);
+		historyTitles.unshift(title);
 	});
-	this.wiki.setTiddlerData(this.historyTitle,historyList,{"current-tiddler": titles[titles.length-1]});
+	this.wiki.setTiddlerData(this.historyTitle,historyList,{"current-tiddler": titles[titles.length-1], list: historyTitles});
 };
 
 Story.prototype.storyCloseTiddler = function(targetTitle) {

core/modules/storyviews/zoomin.js

@@ -39,6 +39,9 @@ var ZoominListView = function(listWidget) {
 	});
 };
 
+// Engage single tiddler mode
+ZoominListView.singleTiddlerMode = true;
+
 ZoominListView.prototype.navigateTo = function(historyInfo) {
 	var duration = $tw.utils.getAnimationDuration(),
 		listElementIndex = this.listWidget.findListItem(0,historyInfo.title);

core/modules/widgets/navigator.js

@@ -116,7 +116,11 @@ NavigatorWidget.prototype.replaceFirstTitleInStory = function(storyList,oldTitle
 };
 
 NavigatorWidget.prototype.addToStory = function(title,fromTitle) {
-	this.wiki.addToStory(title,fromTitle,this.storyTitle,{openLinkFromInsideRiver: this.getAttribute("openLinkFromInsideRiver","top"),openLinkFromOutsideRiver: this.getAttribute("openLinkFromOutsideRiver","top")});
+	this.wiki.addToStory(title,fromTitle,this.storyTitle,{
+		openLinkFromInsideRiver: this.getAttribute("openLinkFromInsideRiver","top"),
+		openLinkFromOutsideRiver: this.getAttribute("openLinkFromOutsideRiver","top"),
+		singleTiddlerMode: this.getAttribute("singleTiddlerMode","no") === "yes",
+	});
 };
 
 /*

core/templates/single.tiddler.window.tid

@@ -12,7 +12,7 @@ title: $:/core/templates/single.tiddler.window
 
 <$importvariables filter="[[$:/core/ui/PageMacros]] [all[shadows+tiddlers]tag[$:/tags/Macro]!has[draft.of]]">
 
-<$navigator story="$:/StoryList" history="$:/HistoryList">
+<$navigator story="$:/StoryList" history="$:/HistoryList" singleTiddlerMode={{{ [{$:/view}getstoryviewsingletiddlermode[]] }}}>
 
 <$transclude mode="block"/>
 

core/ui/PageTemplate.tid

@@ -22,7 +22,7 @@ tc-page-container tc-page-view-$(storyviewTitle)$ tc-language-$(languageTitle)$
 
 <div class=<<containerClasses>>>
 
-<$navigator story="$:/StoryList" history="$:/HistoryList" openLinkFromInsideRiver={{$:/config/Navigation/openLinkFromInsideRiver}} openLinkFromOutsideRiver={{$:/config/Navigation/openLinkFromOutsideRiver}} relinkOnRename={{$:/config/RelinkOnRename}}>
+<$navigator story="$:/StoryList" history="$:/HistoryList" singleTiddlerMode={{{ [{$:/view}getstoryviewsingletiddlermode[]] }}} openLinkFromInsideRiver={{$:/config/Navigation/openLinkFromInsideRiver}} openLinkFromOutsideRiver={{$:/config/Navigation/openLinkFromOutsideRiver}} relinkOnRename={{$:/config/RelinkOnRename}}>
 
 <$dropzone>