feat(keyboard-state): add binding-keys options

include/modules/keyboard_state.hpp

@@ -3,6 +3,7 @@
 #include <fmt/chrono.h>
 #include <gtkmm/label.h>
 
+#include <set>
 #include <unordered_map>
 
 #include "AModule.hpp"
@@ -40,6 +41,7 @@ class KeyboardState : public AModule {
 
   struct libinput* libinput_;
   std::unordered_map<std::string, struct libinput_device*> libinput_devices_;
+  std::set<int> binding_keys;
 
   util::SleeperThread libinput_thread_, hotplug_thread_;
 };

man/waybar-keyboard-state.5.scd

@@ -48,6 +48,11 @@ You must be a member of the input group to use this module.
 	default: chooses first valid input device ++
 	Which libevdev input device to show the state of. Libevdev devices can be found in /dev/input. The device should support number lock, caps lock, and scroll lock events.
 
+*binding-keys*: ++
+	typeof: array ++
+	default: [58, 69, 70] ++
+	Customize the key to trigger this module, the key number can be find in /usr/include/linux/input-event-codes.h or running sudo libinput debug-events --show-keycodes.
+
 # FORMAT REPLACEMENTS
 
 *{name}*: Caps, Num, or Scroll.

src/modules/keyboard_state.cpp

@@ -142,6 +142,21 @@ waybar::modules::KeyboardState::KeyboardState(const std::string& id, const Bar&
     }
   }
 
+  auto keys = config_["binding-keys"];
+  if (keys.isArray()) {
+    for (const auto& key : keys) {
+      if (key.isInt()) {
+        binding_keys.insert(key.asInt());
+      } else {
+        spdlog::warn("Cannot read key binding {} as int.", key.asString());
+      }
+    }
+  } else {
+    binding_keys.insert(KEY_CAPSLOCK);
+    binding_keys.insert(KEY_NUMLOCK);
+    binding_keys.insert(KEY_SCROLLLOCK);
+  }
+
   DIR* dev_dir = opendir(devices_path_.c_str());
   if (dev_dir == nullptr) {
     throw errno_error(errno, "Failed to open " + devices_path_);
@@ -171,14 +186,8 @@ waybar::modules::KeyboardState::KeyboardState(const std::string& id, const Bar&
           auto state = libinput_event_keyboard_get_key_state(keyboard_event);
           if (state == LIBINPUT_KEY_STATE_RELEASED) {
             uint32_t key = libinput_event_keyboard_get_key(keyboard_event);
-            switch (key) {
-              case KEY_CAPSLOCK:
-              case KEY_NUMLOCK:
-              case KEY_SCROLLLOCK:
-                dp.emit();
-                break;
-              default:
-                break;
+            if (binding_keys.contains(key)) {
+              dp.emit();
             }
           }
         }