Show stylesheets as rendered plain text with highlighting (#6778)

* First commit

* Enable syntax highlighting when highlight plugin is installed

* Use highlighting for the control panel stylesheet listings

core/ui/ViewTemplate/body/rendered-plain-text.tid

@@ -0,0 +1,6 @@
+title: $:/core/ui/ViewTemplate/body/rendered-plain-text
+
+\whitespace trim
+<$wikify name="text" text={{!!text}} type={{!!type}}>
+<$codeblock code=<<text>> language="css"/>
+</$wikify>

core/wiki/config/ViewTemplateBodyFilters.multids

@@ -1,6 +1,7 @@
 title: $:/config/ViewTemplateBodyFilters/
 tags: $:/tags/ViewTemplateBodyFilter
 
+stylesheet: [tag[$:/tags/Stylesheet]then[$:/core/ui/ViewTemplate/body/rendered-plain-text]]
 system: [prefix[$:/boot/]] [prefix[$:/config/]] [prefix[$:/core/macros]] [prefix[$:/core/save/]] [prefix[$:/core/templates/]] [prefix[$:/core/ui/]split[/]count[]compare:number:eq[4]] [prefix[$:/info/]] [prefix[$:/language/]] [prefix[$:/languages/]] [prefix[$:/snippets/]] [prefix[$:/state/]] [prefix[$:/status/]] [prefix[$:/info/]] [prefix[$:/temp/]] +[!is[image]limit[1]then[$:/core/ui/ViewTemplate/body/code]]
 code-body: [field:code-body[yes]then[$:/core/ui/ViewTemplate/body/code]]
 import: [field:plugin-type[import]then[$:/core/ui/ViewTemplate/body/import]]

core/wiki/peek-stylesheets.tid

@@ -23,11 +23,7 @@ title: $:/snippets/peek-stylesheets
 <$reveal type="match" state=<<state>> text="yes" tag="div">
 <$set name="source" tiddler=<<currentTiddler>>>
 <$wikify name="styles" text=<<source>>>
-<pre>
-<code>
-<$text text=<<styles>>/>
-</code>
-</pre>
+<$codeblock code=<<styles>> language="css"/>
 </$wikify>
 </$set>
 </$reveal>

core/wiki/tags/ViewTemplateBodyFilter.tid

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

editions/tw5.com/tiddlers/_tw_shared/styles.tid

@@ -1,6 +1,5 @@
 title: $:/_tw_shared/styles
 tags: $:/tags/Stylesheet TiddlyWikiSitesMenu
-code-body: yes
 
 \rules only filteredtranscludeinline transcludeinline macrodef macrocallinline macrocallblock
 

editions/tw5.com/tiddlers/demonstrations/CustomStoryTiddlerTemplateDemo.tid/Styles.tid

@@ -1,6 +1,5 @@
 title: $:/_tw5.com/CustomStoryTiddlerTemplateDemo/Styles
 tags: $:/tags/Stylesheet
-code-body: yes
 
 .tc-custom-tiddler-template {
 	border: 3px solid <<colour muted-foreground>>;

editions/tw5.com/tiddlers/system/doc-styles.tid

@@ -1,4 +1,3 @@
-code-body: yes
 created: 20150117152612000
 modified: 20220617125128201
 tags: $:/tags/Stylesheet

plugins/tiddlywiki/katex/styles.tid

@@ -1,6 +1,5 @@
 title: $:/plugins/tiddlywiki/katex/styles
 tags: [[$:/tags/Stylesheet]]
-code-body: yes
 
 \rules only filteredtranscludeinline transcludeinline macrodef macrocallinline