Merge pull request #3395 from RobertMueller2/issue_33341

add hide-empty-text option to hide module whenever output is empty but format is not

man/waybar-custom.5.scd

@@ -21,6 +21,10 @@ Addressed by *custom/<name>*
 	The path to a script, which determines if the script in *exec* should be executed. ++
 	*exec* will be executed if the exit code of *exec-if* equals 0.
 
+*hide-empty-text*: ++
+	typeof: bool ++
+	Disables the module when output is empty, but format might contain additional static content.
+
 *exec-on-event*: ++
 	typeof: bool ++
 	default: true ++

src/modules/custom.cpp

@@ -162,7 +162,7 @@ auto waybar::modules::Custom::update() -> void {
     auto str = fmt::format(fmt::runtime(format_), text_, fmt::arg("alt", alt_),
                            fmt::arg("icon", getIcon(percentage_, alt_)),
                            fmt::arg("percentage", percentage_));
-    if (str.empty()) {
+    if ((config_["hide-empty-text"].asBool() && text_.empty()) || str.empty()) {
       event_box_.hide();
     } else {
       label_.set_markup(str);