[1.15.2] Change player name in Tab List (Player List)

[Babatunde 0]

Hi everyone,

 

I want to add a suffix to every players name, but I cant get it to work.

I'm doing it like this:

 

@SubscribeEvent
public void onNameFormat(PlayerEvent.NameFormat event) {
    if (event.getEntity() instanceof PlayerEntity) {
        event.setDisplayname(event.getUsername() + " test");
    }
}

 

If I use

event.getDisplayname()

it shows the name + test, but it doesn't change on the tab list. 

Do I need to somehow update the tab list for it to work or am I doing it completely wrong?

 

Thanks!

[ChampionAsh5357 163]

That grabs the name from the NetworkPlayerInfo which is separate. You would need to set it from the ClientPlayerEntity in a sided-safe manner.

[diesieben07 7621]

You can also do it from the server, by sending a SPlayerListItemPacket with Action.UPDATE_DISPLAY_NAME. Minecraft never does this, because in vanilla the display name never changes.

[Babatunde 0]

47 minutes ago, diesieben07 said:

by sending a SPlayerListItemPacket with Action.UPDATE_DISPLAY_NAME

How would I do this? I've never worked with packets before.

[diesieben07 7621]

17 minutes ago, Babatunde said:

How would I do this? I've never worked with packets before.

PlayerList#sendPacketToAllPlayers

[Babatunde 0]

 That doesn't seem to work for me 🤔

 

This is what I got rn:

public class ChangeTabListEvents {

    @SubscribeEvent
    public void onNameFormat(PlayerEvent.NameFormat event) {
        if (event.getEntity() instanceof PlayerEntity) {
            event.setDisplayname(event.getUsername() + " (" + event.getPlayer().getMaxHealth() + ")");
            event.getEntity().sendMessage(new KeybindTextComponent("NameFormat event fired."));
        }
    }

    @SubscribeEvent
    public void onPlayerLogin(EntityJoinWorldEvent event) {
        if (event.getEntity() instanceof PlayerEntity) {
            PlayerEntity player = (PlayerEntity) event.getEntity();
            if (player.getServer() != null) {
                ForgeEventFactory.getPlayerDisplayName(player, player.getGameProfile().getName());
                player.getServer().getPlayerList().sendPacketToAllPlayers(new SPlayerListItemPacket(SPlayerListItemPacket.Action.UPDATE_DISPLAY_NAME));
                player.sendMessage(new KeybindTextComponent("Display name updated."));
            }
        }
    }
}

 

[diesieben07 7621]

1. Do not call the method in ForgeEventFactory. Use the normal getDisplayName method.
2. You won't be able to use the normal SPlayerListItemPacket constructors, you'll need to hack it a bit. By default it always uses ServerPlayerEntity#getTabListDisplayName, which always returns null. You need to get the entries list using reflection and set the displayName field also using reflection.
3. You did not give any players to the packet, so it will do absolutely nothing.

[Babatunde 0]

So, I've looked at reflection together with a friend of mine, but we could get it to work. 

 

We now have this:
 

    @SubscribeEvent
    public void onPlayerLogin(EntityJoinWorldEvent event) {
        if (event.getEntity() instanceof PlayerEntity) {
            PlayerEntity player = (PlayerEntity) event.getEntity();
            if (player.getServer() != null) {
                ForgeEventFactory.getPlayerDisplayName(player, player.getGameProfile().getName());
                try {
                    Field field = ObfuscationReflectionHelper.findField(SPlayerListItemPacket.class, "field_179769_b");
                } catch (Throwable e) {
                    e.printStackTrace();
                }
                player.getServer().getPlayerList().sendPacketToAllPlayers(new SPlayerListItemPacket(SPlayerListItemPacket.Action.UPDATE_DISPLAY_NAME, (ServerPlayerEntity) player));
                player.sendMessage(new KeybindTextComponent("Display name updated."));
            }
        }
    }

 

field_179769_b = players from:

private final List<SPlayerListItemPacket.AddPlayerData> players = Lists.newArrayList();
  

from the SPlayerListItemPacket class. That is the entries you were talking about right?

 

But we don't know wat to do now.

 

P.S. I'm still using the ForgeEventFactory because getDisplayname() wouldn't fire the even for some reason...

 

Help would be much apriciated, thanks.

Edited January 14 by Babatunde

[diesieben07 7621]

• You need to call refreshDisplayName if you want the event to be fired again when calling getDisplayName again. This is explained in the event's documentation.
• Probably better to use PlayerLoggedInEvent.

• 7 minutes ago, Babatunde said:

  But we don't know wat to do now.

  You need to get the entries from the packet you create and forcibly set the display name property inside there. As vanilla will always set it to null.

[coalbricks 1]

It looks like you will need to use reflection twice.

After you create the packet object, you will need to access SPlayerListItemPacket#players. SPlayerListItem#getEntries() only exists on the client, so you won't be able to use this.

The elements of the list (of type SPlayerListItemPacket.AddPlayerData) contain a private 'displayName' member, which you will also need access to. (I would advise creating the Field objects in a static context instead of every EntityJoinWorldEvent, to save performance).

Iterate through all the objects in the list and set their display names accordingly - although from your code it looks like there should only be one object in the list.

 

 

[Babatunde 0]

20 hours ago, diesieben07 said:

You need to call refreshDisplayName if you want the event to be fired again when calling getDisplayName again. This is explained in the event's documentation.

refreshDisplayName is from 1.12.2. A lot is the documentation is outdated.

20 hours ago, diesieben07 said:

Probably better to use PlayerLoggedInEvent.

Thanks, I forgot that existed.

 

20 hours ago, diesieben07 said:

You need to get the entries from the packet you create and forcibly set the display name property inside there.

I'm sorry, I've never worked with packets before. is there a tutorial or documentation on how to create packets?

[Babatunde 0]

17 hours ago, coalbricks said:

(I would advise creating the Field objects in a static context instead of every EntityJoinWorldEvent, to save performance)

Thanks for the tip.

 

17 hours ago, coalbricks said:

After you create the packet object

How do I do this tho?

[coalbricks 1]

8 hours ago, Babatunde said:

How do I do this tho?

You've already done it, here:

new SPlayerListItemPacket(SPlayerListItemPacket.Action.UPDATE_DISPLAY_NAME, (ServerPlayerEntity) player)

A packet is just a bit of data that is sent between two or more computers over a network. Usually you don't have to manually send packets because Minecraft takes care of this for you for standard vanilla gameplay, but in this case I think it's the best solution. You can dig around the 'net.minecraft.network' or 'net.minecraft.network.play' packages to look at some example packet implementations; AFAIK there isn't any documentation on them. What IDE are you using?

Edited January 16 by coalbricks

[Babatunde 0]

6 hours ago, coalbricks said:

What IDE are you using?

Intellij IDEA Ultimate.

 

6 hours ago, coalbricks said:

You've already done it, here:

Oh nice! completely forgot about that line lmao.

 

This is what I've got so far, I'm kinda stuck because I have no idea what to do:

public class ChangeTabListEvents {

    private final Field fieldPlayers = ObfuscationReflectionHelper.findField(SPlayerListItemPacket.class, "field_179769_b");
    private final Field fieldDisplayName = ObfuscationReflectionHelper.findField(SPlayerListItemPacket.AddPlayerData.class, "field_179965_e");

    @SubscribeEvent
    public void onPlayerLogin(PlayerEvent.PlayerLoggedInEvent event) {
        PlayerEntity player = event.getPlayer();
        if (player.getServer() != null) {
            try {
                
            } catch (Throwable e) {
                e.printStackTrace();
            }
            player.getServer().getPlayerList().sendPacketToAllPlayers(new SPlayerListItemPacket(SPlayerListItemPacket.Action.UPDATE_DISPLAY_NAME, (ServerPlayerEntity) player));
            player.sendMessage(new KeybindTextComponent("Display name updated."));
        }
    }
}

Do I need to get the list somehow, or do I need to make my own and set my list as the players list? 

And why do I need the 'displayName'?

 

Thanks for the help so far, I appreciate it!

Edited January 16 by Babatunde

[diesieben07 7621]

15 hours ago, Babatunde said:

refreshDisplayName is from 1.12.2. A lot is the documentation is outdated.

No, it exists in 1.16.4 and also 1.15.2.

 

32 minutes ago, Babatunde said:

his is what I've got so far, I'm kinda stuck because I have no idea what to do:

• Make those Field fields static.
• You need to create the packet first and store it in a variable, so you can work with it. Don't immediately send it.
• You need to then get the list of AddPlayerData instances from the packet. For this you get the "players" field, using the reflection Field you have already. Then for those AddPlayerData instances you need to set their displayName field, again using reflection.

34 minutes ago, Babatunde said:

And why do I need the 'displayName'?

You need to set it, because Minecraft never sends any custom display name to the client - even though it has the network infrastructure to do so (SPlayerListItemPacket). It always just sends null for the display name, even if a custom display name is set.