Fix code block style for code preview (#30298)

Fix #30292

To avoid unnecessary style overriding, use "div" instead of "code"

modules/markup/sanitizer.go

@@ -65,7 +65,7 @@ func createDefaultPolicy() *bluemonday.Policy {
 	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-num$`)).OnElements("td")
 	policy.AllowAttrs("data-line-number").OnElements("span")
 	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-code chroma$`)).OnElements("td")
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-inner$`)).OnElements("code")
+	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-inner$`)).OnElements("div")
 
 	// For code preview (unicode escape)
 	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^file-view( unicode-escaped)?$`)).OnElements("table")

services/markup/processorhelper_codepreview_test.go

@@ -36,10 +36,10 @@ func TestProcessorHelperCodePreview(t *testing.T) {
 	<table class="file-view">
 		<tbody><tr>
 				<td class="lines-num"><span data-line-number="1"></span></td>
-				<td class="lines-code chroma"><code class="code-inner"><span class="gh"># repo1</code></td>
+				<td class="lines-code chroma"><div class="code-inner"><span class="gh"># repo1</div></td>
 			</tr><tr>
 				<td class="lines-num"><span data-line-number="2"></span></td>
-				<td class="lines-code chroma"><code class="code-inner"></span><span class="gh"></span></code></td>
+				<td class="lines-code chroma"><div class="code-inner"></span><span class="gh"></span></div></td>
 			</tr></tbody>
 	</table>
 </div>
@@ -63,7 +63,7 @@ func TestProcessorHelperCodePreview(t *testing.T) {
 	<table class="file-view">
 		<tbody><tr>
 				<td class="lines-num"><span data-line-number="1"></span></td>
-				<td class="lines-code chroma"><code class="code-inner"><span class="gh"># repo1</code></td>
+				<td class="lines-code chroma"><div class="code-inner"><span class="gh"># repo1</div></td>
 			</tr></tbody>
 	</table>
 </div>

templates/base/markup_codepreview.tmpl

@@ -17,7 +17,7 @@
 					{{- $lineEscapeStatus := index $.LineEscapeStatus $idx -}}
 					<td class="lines-escape">{{if $lineEscapeStatus.Escaped}}<a href="#" class="toggle-escape-button btn interact-bg" title="{{if $lineEscapeStatus.HasInvisible}}{{ctx.Locale.Tr "repo.invisible_runes_line"}} {{end}}{{if $lineEscapeStatus.HasAmbiguous}}{{ctx.Locale.Tr "repo.ambiguous_runes_line"}}{{end}}"></a>{{end}}</td>
 				{{- end}}
-				<td class="lines-code chroma"><code class="code-inner">{{$line.FormattedContent}}</code></td>
+				<td class="lines-code chroma"><div class="code-inner">{{$line.FormattedContent}}</div></td>{{/* only div works, span generates incorrect HTML structure */}}
 			</tr>
 			{{- end -}}
 		</tbody>

web_src/css/markup/content.css

@@ -432,7 +432,7 @@
   text-align: right;
 }
 
-.markup code:not(.code-inner),
+.markup code,
 .markup tt {
   padding: 0.2em 0.4em;
   margin: 0;