Remove third party rice boxes

Former-commit-id: b52f339d7a13e12d6e7d194a4e5ce4dabae7b61c [formerly 8ee8ebe7d1133b8ca7c46854a31a0a711b5579fc] [formerly 05100c5f169e072f21204537f4d8ddaf2f821377 [formerly 3c821a541373fc8e6b0323bb6abe5a0447931694]]
Former-commit-id: e5d5c4ac1d7518d8032ace12bf5efe26d0502a6b [formerly ea15d87d509cc85d2865d9a249acd15975dfa43d]
Former-commit-id: 08848510019b280a91a61156e88f5b914d4f8d88

editor.go

@@ -87,6 +87,50 @@ Error:
 	return e, nil
 }
 
+// serveSingle serves a single file in an editor (if it is editable), shows the
+// plain file, or downloads it if it can't be shown.
+func serveSingle(w http.ResponseWriter, r *http.Request, c *FileManager, u *User, i *fileInfo) (int, error) {
+	var err error
+
+	if err = i.RetrieveFileType(); err != nil {
+		return errorToHTTP(err, true), err
+	}
+
+	p := &page{
+		Name:      i.Name,
+		Path:      i.VirtualPath,
+		IsDir:     false,
+		Data:      i,
+		User:      u,
+		PrefixURL: c.PrefixURL,
+		BaseURL:   c.AbsoluteURL(),
+		WebDavURL: c.AbsoluteWebDavURL(),
+	}
+
+	// If the request accepts JSON, we send the file information.
+	if strings.Contains(r.Header.Get("Accept"), "application/json") {
+		return p.PrintAsJSON(w)
+	}
+
+	if i.Type == "text" {
+		if err = i.Read(); err != nil {
+			return errorToHTTP(err, true), err
+		}
+	}
+
+	if i.CanBeEdited() && u.AllowEdit {
+		p.Data, err = getEditor(r, i)
+		p.Editor = true
+		if err != nil {
+			return http.StatusInternalServerError, err
+		}
+
+		return p.PrintAsHTML(w, c, "frontmatter", "editor")
+	}
+
+	return p.PrintAsHTML(w, c, "single")
+}
+
 func editorClass(mode string) string {
 	switch mode {
 	case "json", "toml", "yaml":