Add keyboard key event

+ Triggered on key_press events
+ TODO: decide what data is passed to the callback
+ TODO: decide when the callback is called

heart/include/hrt/hrt_input.h

@@ -32,8 +32,12 @@ struct hrt_seat {
 };
 
 struct hrt_seat_callbacks {
+  // TODO: these need parameters
   void (*button_event)();
   void (*wheel_event)();
+  bool (*keyboard_key_event)();
+  // TODO: I don't know if we need this event:
+  // bool (*keyboard_modifier_event)();
 };
 
 struct hrt_input {

heart/src/keyboard.c

@@ -78,6 +78,10 @@ static void seat_handle_key(struct wl_listener *listener, void *data) {
 
   bool handled = false;
 
+  if(event->state == WLR_KEY_PRESSED) {
+    seat->callbacks->keyboard_key_event();
+  }
+
   if(!handled && event->state == WLR_KEY_PRESSED) {
     handled = execute_hardcoded_bindings(server, raw_keysyms, raw_modifiers, raw_keysyms_len);
   }

heart/src/main.c

@@ -13,6 +13,11 @@ void output_callback(struct hrt_output *output) {
   puts("Output callback called");
 }
 
+bool keyboard_callback() {
+  puts("Keyboard callback called");
+  return false;
+}
+
 static const struct hrt_output_callbacks output_callbacks = {
   .output_added = &output_callback,
   .output_removed = &output_callback,
@@ -21,6 +26,7 @@ static const struct hrt_output_callbacks output_callbacks = {
 static const struct hrt_seat_callbacks seat_callbacks = {
   .button_event = &cursor_callback,
   .wheel_event = &cursor_callback,
+  .keyboard_key_event = &keyboard_callback,
 };
 
 int main(int argc, char *argv[]) {