From ae4e99951abfe9ad2547b7b5b7a8d426896dd720 Mon Sep 17 00:00:00 2001
From: Jeremy Ruston <jeremy@jermolene.com>
Date: Sun, 18 Jan 2026 11:40:10 +0000
Subject: [PATCH] Revert #9554 Refactor stylesheets in single <style> tags

These changes break the palette switcher
---
 core/modules/startup/render.js                | 25 +++++++++++++------
 core/modules/startup/windows.js               | 16 +++++++++---
 core/templates/exporters/StaticRiver.tid      |  4 ++-
 core/templates/static.template.html.tid       |  4 ++-
 core/templates/tiddlywiki5.html.tid           |  1 -
 core/ui/RootStylesheet.tid                    | 13 ----------
 .../5.4.0/#8130 - root-stylesheet-refresh.tid | 15 -----------
 7 files changed, 35 insertions(+), 43 deletions(-)
 delete mode 100644 core/ui/RootStylesheet.tid
 delete mode 100644 editions/tw5.com/tiddlers/releasenotes/5.4.0/#8130 - root-stylesheet-refresh.tid

diff --git a/core/modules/startup/render.js b/core/modules/startup/render.js
index bb4aac51e..43ef48207 100644
--- a/core/modules/startup/render.js
+++ b/core/modules/startup/render.js
@@ -17,7 +17,7 @@ exports.synchronous = true;
 
 // Default story and history lists
 var PAGE_TITLE_TITLE = "$:/core/wiki/title";
-var ROOT_STYLESHEET_TITLE = "$:/core/ui/RootStylesheet";
+var PAGE_STYLESHEET_TITLE = "$:/core/ui/PageStylesheet";
 var PAGE_TEMPLATE_TITLE = "$:/core/ui/RootTemplate";
 
 // Time (in ms) that we defer refreshing changes to draft tiddlers
@@ -44,13 +44,22 @@ exports.startup = function() {
 			publishTitle();
 		}
 	});
-
-	var styleParser = $tw.wiki.parseTiddler(ROOT_STYLESHEET_TITLE,{parseAsInline: true}),
-		styleWidgetNode = $tw.wiki.makeWidget(styleParser,{document: document});
-	styleWidgetNode.render(document.head,null);
-
+	// Set up the styles
+	$tw.styleWidgetNode = $tw.wiki.makeTranscludeWidget(PAGE_STYLESHEET_TITLE,{document: $tw.fakeDocument});
+	$tw.styleContainer = $tw.fakeDocument.createElement("style");
+	$tw.styleWidgetNode.render($tw.styleContainer,null);
+	$tw.styleWidgetNode.assignedStyles = $tw.styleContainer.textContent;
+	$tw.styleElement = document.createElement("style");
+	$tw.styleElement.innerHTML = $tw.styleWidgetNode.assignedStyles;
+	document.head.insertBefore($tw.styleElement,document.head.firstChild);
 	$tw.wiki.addEventListener("change",$tw.perf.report("styleRefresh",function(changes) {
-		styleWidgetNode.refresh(changes,document.head,null);
+		if($tw.styleWidgetNode.refresh(changes,$tw.styleContainer,null)) {
+			var newStyles = $tw.styleContainer.textContent;
+			if(newStyles !== $tw.styleWidgetNode.assignedStyles) {
+				$tw.styleWidgetNode.assignedStyles = newStyles;
+				$tw.styleElement.innerHTML = $tw.styleWidgetNode.assignedStyles;
+			}
+		}
 	}));
 	// Display the $:/core/ui/PageTemplate tiddler to kick off the display
 	$tw.perf.report("mainRender",function() {
@@ -59,7 +68,7 @@ exports.startup = function() {
 		$tw.utils.addClass($tw.pageContainer,"tc-page-container-wrapper");
 		document.body.insertBefore($tw.pageContainer,document.body.firstChild);
 		$tw.pageWidgetNode.render($tw.pageContainer,null);
-		$tw.hooks.invokeHook("th-page-refreshed");
+   		$tw.hooks.invokeHook("th-page-refreshed");
 	})();
 	// Remove any splash screen elements
 	var removeList = document.querySelectorAll(".tc-remove-when-wiki-loaded");
diff --git a/core/modules/startup/windows.js b/core/modules/startup/windows.js
index 3fa70d127..39a2f59d6 100644
--- a/core/modules/startup/windows.js
+++ b/core/modules/startup/windows.js
@@ -63,16 +63,24 @@ exports.startup = function() {
 			$tw.eventBus.emit("window:closed",{windowID});
 		},false);
 		// Set up the styles
-		var styleParser = $tw.wiki.parseTiddler("$:/core/ui/RootStylesheet",{parseAsInline: true}),
-			styleWidgetNode = $tw.wiki.makeWidget(styleParser,{document: srcDocument});
-		styleWidgetNode.render(srcDocument.head,null);
+		var styleWidgetNode = $tw.wiki.makeTranscludeWidget("$:/core/ui/PageStylesheet",{
+				document: $tw.fakeDocument,
+				variables: variables,
+				importPageMacros: true}),
+			styleContainer = $tw.fakeDocument.createElement("style");
+		styleWidgetNode.render(styleContainer,null);
+		var styleElement = srcDocument.createElement("style");
+		styleElement.innerHTML = styleContainer.textContent;
+		srcDocument.head.insertBefore(styleElement,srcDocument.head.firstChild);
 		// Render the text of the tiddler
 		var parser = $tw.wiki.parseTiddler(template),
 			widgetNode = $tw.wiki.makeWidget(parser,{document: srcDocument, parentWidget: $tw.rootWidget, variables: variables});
 		widgetNode.render(srcDocument.body,srcDocument.body.firstChild);
 		// Function to handle refreshes
 		refreshHandler = function(changes) {
-			styleWidgetNode.refresh(changes);
+			if(styleWidgetNode.refresh(changes,styleContainer,null)) {
+				styleElement.innerHTML = styleContainer.textContent;
+			}
 			widgetNode.refresh(changes);
 		};
 		$tw.wiki.addEventListener("change",refreshHandler);
diff --git a/core/templates/exporters/StaticRiver.tid b/core/templates/exporters/StaticRiver.tid
index 176ab80be..3b70c9d11 100644
--- a/core/templates/exporters/StaticRiver.tid
+++ b/core/templates/exporters/StaticRiver.tid
@@ -22,7 +22,9 @@ extension: .html
 <div id="styleArea">
 {{$:/boot/boot.css||$:/core/templates/css-tiddler}}
 </div>
-{{$:/core/ui/RootStylesheet||$:/core/templates/wikified-tiddler}}
+<style type="text/css">
+{{$:/core/ui/PageStylesheet||$:/core/templates/wikified-tiddler}}
+</style>
 </head>
 <body class="tc-body">
 {{$:/StaticBanner||$:/core/templates/html-tiddler}}
diff --git a/core/templates/static.template.html.tid b/core/templates/static.template.html.tid
index ef290053b..8b6482846 100644
--- a/core/templates/static.template.html.tid
+++ b/core/templates/static.template.html.tid
@@ -23,7 +23,9 @@ type: text/vnd.tiddlywiki-html
 <div id="styleArea">
 {{$:/boot/boot.css||$:/core/templates/css-tiddler}}
 </div>
-{{$:/core/ui/RootStylesheet||$:/core/templates/wikified-tiddler}}
+<style type="text/css">
+{{$:/core/ui/PageStylesheet||$:/core/templates/wikified-tiddler}}
+</style>
 </head>
 <body class="tc-body">
 {{$:/StaticBanner||$:/core/templates/html-tiddler}}
diff --git a/core/templates/tiddlywiki5.html.tid b/core/templates/tiddlywiki5.html.tid
index c38cde960..721b3d9ce 100644
--- a/core/templates/tiddlywiki5.html.tid
+++ b/core/templates/tiddlywiki5.html.tid
@@ -25,7 +25,6 @@ title: $:/core/templates/tiddlywiki5.html
 `{{{ [enlist<saveTiddlerAndShadowsFilter>tag[$:/core/wiki/rawmarkup]] ||$:/core/templates/plain-text-tiddler}}}
 {{{ [enlist<saveTiddlerAndShadowsFilter>tag[$:/tags/RawMarkup]] ||$:/core/templates/plain-text-tiddler}}}
 {{{ [enlist<saveTiddlerAndShadowsFilter>tag[$:/tags/RawMarkupWikified]] ||$:/core/templates/raw-static-tiddler}}}`
-<!--~~ Style section start ~~-->
 </head>
 <body class="tc-body">
 <!--~~ Raw markup for the top of the body section ~~-->
diff --git a/core/ui/RootStylesheet.tid b/core/ui/RootStylesheet.tid
deleted file mode 100644
index 67145d93c..000000000
--- a/core/ui/RootStylesheet.tid
+++ /dev/null
@@ -1,13 +0,0 @@
-title: $:/core/ui/RootStylesheet
-code-body: yes
-
-\import [subfilter{$:/core/config/GlobalImportFilter}]
-\whitespace trim
-<$let currentTiddler={{$:/language}} languageTitle={{!!name}}>
-	<$list filter="[all[shadows+tiddlers]tag[$:/tags/Stylesheet]!is[draft]]">
-		<style type="text/css">
-			<$text text={{{ [<currentTiddler>addprefix[/* ]addsuffix[ */]] }}}/>
-			<$transclude $tiddler=<<currentTiddler>> $output="text/plain" $mode="block"/>
-		</style>
-	</$list>
-</$let>
diff --git a/editions/tw5.com/tiddlers/releasenotes/5.4.0/#8130 - root-stylesheet-refresh.tid b/editions/tw5.com/tiddlers/releasenotes/5.4.0/#8130 - root-stylesheet-refresh.tid
deleted file mode 100644
index d57f8b596..000000000
--- a/editions/tw5.com/tiddlers/releasenotes/5.4.0/#8130 - root-stylesheet-refresh.tid	
+++ /dev/null
@@ -1,15 +0,0 @@
-title: $:/changenotes/5.4.0/#9554
-created: 20251212171804335
-modified: 20251212171804335
-tags: $:/tags/ChangeNote
-change-type: performance
-change-category: internal
-description: Different Stylesheets are now included as single `<style>` tags in the Header
-release: 5.4.0
-github-links: https://github.com/TiddlyWiki/TiddlyWiki5/pull/9554
-github-contributors: BurningTreeC Leilei332
-type: text/vnd.tiddlywiki
-
-Previously, all stylesheets were combined in a single `<style>` tag in the `<head>`.
-
-Now, a separate `<style>` tag is created in the `<head>` for each stylesheet.
\ No newline at end of file