use scrolling message for rare and max level announcements on BB

src/ReceiveSubcommands.cc

@@ -2005,17 +2005,18 @@ static void on_pick_up_item_generic(
         string p_name = p->disp.name.decode();
         string desc = s->describe_item(c->version(), fi->data, true);
         string message = string_printf("$C6%s$C7 found\n%s", p_name.c_str(), desc.c_str());
+        string bb_message = string_printf("$C6%s$C7 has found %s", p_name.c_str(), desc.c_str());
         if (should_send_global_notif) {
           for (auto& it : s->channel_to_client) {
             if (it.second->license &&
                 !is_patch(it.second->version()) &&
                 !is_ep3(it.second->version()) &&
                 it.second->lobby.lock()) {
-              send_text_message(it.second, message);
+              send_text_or_scrolling_message(it.second, message, bb_message);
             }
           }
         } else {
-          send_text_message(l, message);
+          send_text_or_scrolling_message(l, nullptr, message, bb_message);
         }
       }
     }
@@ -3150,9 +3151,11 @@ static void send_max_level_notification_if_needed(shared_ptr<Client> c) {
     size_t level_for_str = max_level + 1;
     string message = string_printf("$CG%s$C6\nGC: %" PRIu32 "\nhas reached Level $CG%zu",
         name.c_str(), c->license->serial_number, level_for_str);
+    string bb_message = string_printf("$CG%s$C6 (GC: %" PRIu32 ") has reached Level $CG%zu",
+        name.c_str(), c->license->serial_number, level_for_str);
     for (auto& it : s->channel_to_client) {
       if ((it.second != c) && it.second->license && !is_patch(it.second->version()) && it.second->lobby.lock()) {
-        send_text_message(it.second, message);
+        send_text_or_scrolling_message(it.second, message, bb_message);
       }
     }
   }

src/SendCommands.cc

@@ -884,6 +884,31 @@ __attribute__((format(printf, 2, 3))) void send_ep3_text_message_printf(shared_p
   }
 }
 
+void send_scrolling_message_bb(shared_ptr<Client> c, const string& text) {
+  if (c->version() != Version::BB_V4) {
+    throw logic_error("cannot send scrolling message to non-BB player");
+  }
+  send_header_text(c->channel, 0x00EE, 0, text, ColorMode::ADD);
+}
+
+void send_text_or_scrolling_message(shared_ptr<Client> c, const string& text, const string& scrolling) {
+  if (is_v4(c->version())) {
+    send_scrolling_message_bb(c, scrolling);
+  } else {
+    send_text_message(c, text);
+  }
+}
+
+void send_text_or_scrolling_message(
+    std::shared_ptr<Lobby> l, std::shared_ptr<Client> exclude_c, const std::string& text, const std::string& scrolling) {
+  for (const auto& lc : l->clients) {
+    if (!lc || (lc == exclude_c)) {
+      continue;
+    }
+    send_text_or_scrolling_message(lc, text, scrolling);
+  }
+}
+
 string prepare_chat_data(
     Version version,
     uint8_t language,

src/SendCommands.hh

@@ -191,6 +191,10 @@ void send_text_message(Channel& ch, const std::string& text);
 void send_text_message(std::shared_ptr<Client> c, const std::string& text);
 void send_text_message(std::shared_ptr<Lobby> l, const std::string& text);
 void send_text_message(std::shared_ptr<ServerState> s, const std::string& text);
+void send_scrolling_message_bb(std::shared_ptr<Client> c, const std::string& text);
+void send_text_or_scrolling_message(std::shared_ptr<Client> c, const std::string& text, const std::string& scrolling);
+void send_text_or_scrolling_message(
+    std::shared_ptr<Lobby> l, std::shared_ptr<Client> exclude_c, const std::string& text, const std::string& scrolling);
 
 std::string prepare_chat_data(
     Version version,