add ctx.HTMLString

routers/web/repo/editor.go

@@ -420,7 +420,7 @@ func DiffPreviewPost(ctx *context.Context) {
 	}
 
 	if diff.NumFiles == 0 {
-		ctx.PlainText(http.StatusOK, `<div class="tw-p-6">`+ctx.Locale.TrString("repo.editor.no_changes_to_show")+`</div>`)
+		ctx.HTMLString(http.StatusOK, `<div class="tw-p-6">`+ctx.Locale.TrString("repo.editor.no_changes_to_show")+`</div>`)
 		return
 	}
 	ctx.Data["File"] = diff.Files[0]

services/context/base.go

@@ -137,6 +137,13 @@ func (b *Base) JSON(status int, content any) {
 	}
 }
 
+// JSON render content as JSON
+func (b *Base) HTMLString(status int, html string) {
+	b.Resp.Header().Set("Content-Type", "text/html;charset=utf-8")
+	b.Resp.WriteHeader(status);
+	b.Resp.Write([]byte(html))
+}
+
 // RemoteAddr returns the client machine ip address
 func (b *Base) RemoteAddr() string {
 	return b.Req.RemoteAddr