Notification string to a queue of strings (#2517)

Fixes #2469

* made inputdata to queue<string>

* changed back to front

* fixed move semantics issue while popping queue

* Removed ide file

* commented test lines

* review changes

* review changes

* Update CHANGELOG.md

* Cleanup

Co-authored-by: patrick96 <p.ziegler96@gmail.com>

.gitignore

@@ -6,5 +6,6 @@
 *.swp
 *.tmp
 .tags
+*.user
 
 polybar-*.tar

CHANGELOG.md

@@ -141,6 +141,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Clicks arriving in close succession, no longer get dropped. Before polybar
   would drop any click that arrived within 5ms of the previous one.
 - Increased the double click interval from 150ms to 400ms.
+- Stop ignoring actions if they arrive while the previous one hasn't been processed yet.
+  ([`#2469`](https://github.com/polybar/polybar/issues/2469))
 
 ### Fixed
 - `custom/script`: Concurrency issues with fast-updating tailed scripts.

include/components/controller.hpp

@@ -2,6 +2,7 @@
 
 #include <atomic>
 #include <mutex>
+#include <queue>
 
 #include "common.hpp"
 #include "components/eventloop.hpp"
@@ -15,6 +16,8 @@
 
 POLYBAR_NS
 
+using std::queue;
+
 // fwd decl {{{
 
 enum class alignment;
@@ -30,7 +33,6 @@ namespace modules {
 }  // namespace modules
 using module_t = shared_ptr<modules::module_interface>;
 using modulemap_t = std::map<alignment, vector<module_t>>;
-
 // }}}
 
 class controller : public signal_receiver<SIGN_PRIORITY_CONTROLLER, signals::eventqueue::exit_reload,
@@ -83,9 +85,9 @@ class controller : public signal_receiver<SIGN_PRIORITY_CONTROLLER, signals::eve
     bool reload;
     bool update;
     bool force_update;
-    string inputdata;
+    queue<string> inputdata;
 
-    notifications_t() : quit(false), reload(false), update(false), force_update(false), inputdata(string{}) {}
+    notifications_t() : quit(false), reload(false), update(false), force_update(false), inputdata(queue<string>{}) {}
   };
 
   size_t setup_modules(alignment align);

src/components/controller.cpp

@@ -128,13 +128,9 @@ bool controller::run(bool writeback, string snapshot_dst, bool confwatch) {
  */
 void controller::trigger_action(string&& input_data) {
   std::unique_lock<std::mutex> guard(m_notification_mutex);
-
-  if (m_notifications.inputdata.empty()) {
-    m_notifications.inputdata = std::move(input_data);
-    trigger_notification();
-  } else {
-    m_log.trace("controller: Swallowing input event (pending data)");
-  }
+  m_log.trace("controller: Queueing input event '%s'", input_data);
+  m_notifications.inputdata.push(std::move(input_data));
+  trigger_notification();
 }
 
 void controller::trigger_quit(bool reload) {
@@ -215,8 +211,11 @@ void controller::notifier_handler() {
     return;
   }
 
-  if (!data.inputdata.empty()) {
-    process_inputdata(std::move(data.inputdata));
+  while (!data.inputdata.empty()) {
+    auto inputdata = data.inputdata.front();
+    data.inputdata.pop();
+    m_log.trace("controller: Dequeueing inputdata: '%s'", inputdata);
+    process_inputdata(std::move(inputdata));
   }
 
   if (data.update) {
@@ -461,7 +460,6 @@ void controller::process_inputdata(string&& cmd) {
     m_log.err("controller: Error while forwarding input to shell -> %s", err.what());
   }
 }
-
 /**
  * Process eventqueue update event
  */