#2866: Add support for contents in Hover Event

chat/src/main/java/net/md_5/bungee/api/chat/HoverEvent.java

@@ -1,8 +1,26 @@
 package net.md_5.bungee.api.chat;
 
+import com.google.common.base.Preconditions;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import lombok.AllArgsConstructor;
+import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.NonNull;
 import lombok.RequiredArgsConstructor;
+import lombok.Setter;
 import lombok.ToString;
 
 @Getter
@@ -12,15 +30,335 @@ import lombok.ToString;
 public final class HoverEvent
 {
 
+    /**
+     * The action of this event.
+     */
     private final Action action;
-    private final BaseComponent[] value;
+    /**
+     * List of contents to provide for this event.
+     */
+    private final List<Content> contents;
+    /**
+     * Returns whether this hover event is prior to 1.16
+     */
+    @Setter
+    private boolean legacy = false;
+
+    /**
+     * Creates event with an action and a list of contents.
+     *
+     * @param action action of this event
+     * @param contents array of contents, provide at least one
+     */
+    public HoverEvent(Action action, Content... contents)
+    {
+        Preconditions.checkArgument( contents.length != 0, "Must contain at least one content" );
+        this.action = action;
+        this.contents = new ArrayList<>();
+        for ( Content it : contents )
+        {
+            addContent( it );
+        }
+    }
+
+    /**
+     * Legacy constructor to create hover event.
+     *
+     * @param action the action
+     * @param value the value
+     * @deprecated {@link #HoverEvent(Action, Content[])}
+     */
+    @Deprecated
+    public HoverEvent(Action action, BaseComponent[] value)
+    {
+        // Old plugins may have somehow hacked BaseComponent[] into
+        // anything other than SHOW_TEXT action. Ideally continue support.
+        this.action = action;
+        this.contents = new ArrayList<>( Collections.singletonList( new ContentText( value ) ) );
+        this.legacy = true;
+    }
+
+    /**
+     * Adds a content to this hover event.
+     *
+     * @param content the content add
+     * @throws IllegalArgumentException if is a legacy component and already has
+     * a content
+     * @throws UnsupportedOperationException if content action does not match
+     * hover event action
+     */
+    public void addContent(Content content) throws UnsupportedOperationException
+    {
+        Preconditions.checkArgument( !legacy || contents.size() == 0, "Legacy HoverEvent may not have more than one content" );
+        content.assertAction( action );
+        contents.add( content );
+    }
+
+    @ToString
+    @EqualsAndHashCode
+    public abstract static class Content
+    {
+
+        /**
+         * Required action for this content type.
+         *
+         * @return action
+         */
+        abstract Action requiredAction();
+
+        /**
+         * Tests this content against an action
+         *
+         * @param input input to test
+         * @throws UnsupportedOperationException if action incompatible
+         */
+        void assertAction(Action input) throws UnsupportedOperationException
+        {
+            if ( input != requiredAction() )
+            {
+                throw new UnsupportedOperationException( "Action " + input + " not compatible! Expected " + requiredAction() );
+            }
+        }
+    }
+
+    @Data
+    @ToString
+    public static class ContentText extends Content
+    {
+
+        /**
+         * The value.
+         *
+         * May be a component or raw text depending on constructor used.
+         */
+        private Object value;
+
+        public ContentText(BaseComponent[] value)
+        {
+            this.value = value;
+        }
+
+        public ContentText(String value)
+        {
+            this.value = value;
+        }
+
+        @Override
+        Action requiredAction()
+        {
+            return Action.SHOW_TEXT;
+        }
+
+        @Override
+        public boolean equals(Object o)
+        {
+            if ( value instanceof BaseComponent[] )
+            {
+                return o instanceof ContentText
+                        && ( (ContentText) o ).value instanceof BaseComponent[]
+                        && Arrays.equals( (BaseComponent[]) value, (BaseComponent[]) ( (ContentText) o ).value );
+            } else
+            {
+                return value.equals( o );
+            }
+        }
+
+        @Override
+        public int hashCode()
+        {
+            return ( value instanceof BaseComponent[] ) ? Arrays.hashCode( (BaseComponent[]) value ) : value.hashCode();
+        }
+
+        public static class Serializer implements JsonSerializer<ContentText>, JsonDeserializer<ContentText>
+        {
+
+            @Override
+            public ContentText deserialize(JsonElement element, Type type, JsonDeserializationContext context) throws JsonParseException
+            {
+                if ( element.isJsonArray() )
+                {
+                    return new ContentText( context.<BaseComponent[]>deserialize( element, BaseComponent[].class ) );
+                } else if ( element.getAsJsonObject().isJsonPrimitive() )
+                {
+                    return new ContentText( element.getAsJsonObject().getAsJsonPrimitive().getAsString() );
+                } else
+                {
+                    return new ContentText( new BaseComponent[]
+                    {
+                        context.deserialize( element, BaseComponent.class )
+                    } );
+                }
+            }
+
+            @Override
+            public JsonElement serialize(ContentText content, Type type, JsonSerializationContext context)
+            {
+                return context.serialize( content.getValue() );
+            }
+        }
+    }
+
+    @Data
+    @NoArgsConstructor
+    @AllArgsConstructor
+    @ToString
+    @EqualsAndHashCode(callSuper = true)
+    public static class ContentEntity extends Content
+    {
+
+        /**
+         * Namespaced entity ID.
+         *
+         * Will use 'minecraft:pig' if null.
+         */
+        private String type;
+        /**
+         * Entity UUID in hyphenated hexadecimal format.
+         *
+         * Should be valid UUID. TODO : validate?
+         */
+        @NonNull
+        private String id;
+        /**
+         * Name to display as the entity.
+         *
+         * This is optional and will be hidden if null.
+         */
+        private BaseComponent name;
+
+        @Override
+        Action requiredAction()
+        {
+            return Action.SHOW_ENTITY;
+        }
+
+        public static class Serializer implements JsonSerializer<ContentEntity>, JsonDeserializer<ContentEntity>
+        {
+
+            @Override
+            public ContentEntity deserialize(JsonElement element, Type type, JsonDeserializationContext context) throws JsonParseException
+            {
+                JsonObject value = element.getAsJsonObject();
+
+                return new ContentEntity(
+                        ( value.has( "type" ) ) ? value.get( "type" ).getAsString() : null,
+                        value.get( "id" ).getAsString(),
+                        ( value.has( "name" ) ) ? context.deserialize( value.get( "name" ), BaseComponent.class ) : null
+                );
+            }
+
+            @Override
+            public JsonElement serialize(ContentEntity content, Type type, JsonSerializationContext context)
+            {
+                JsonObject object = new JsonObject();
+                object.addProperty( "type", ( content.getType() != null ) ? content.getType() : "minecraft:pig" );
+                object.addProperty( "id", content.getId() );
+                if ( content.getName() != null )
+                {
+                    object.add( "name", context.serialize( content.getName() ) );
+                }
+                return object;
+            }
+        }
+    }
+
+    @Data
+    @NoArgsConstructor
+    @AllArgsConstructor
+    @ToString
+    @EqualsAndHashCode(callSuper = true)
+    public static class ContentItem extends Content
+    {
+
+        /**
+         * Namespaced item ID. Will use 'minecraft:air' if null.
+         */
+        private String id;
+        /**
+         * Optional. Size of the item stack.
+         */
+        private int count = -1;
+        /**
+         * Optional. Item tag.
+         */
+        private ItemTag tag;
+
+        @Override
+        Action requiredAction()
+        {
+            return Action.SHOW_ITEM;
+        }
+
+        public static class Serializer implements JsonSerializer<ContentItem>, JsonDeserializer<ContentItem>
+        {
+
+            @Override
+            public ContentItem deserialize(JsonElement element, Type type, JsonDeserializationContext context) throws JsonParseException
+            {
+                JsonObject value = element.getAsJsonObject();
+
+                return new ContentItem(
+                        ( value.has( "id" ) ) ? value.get( "id" ).getAsString() : null,
+                        ( value.has( "Count" ) ) ? value.get( "Count" ).getAsInt() : -1,
+                        ( value.has( "tag" ) ) ? context.deserialize( value.get( "tag" ), ItemTag.class ) : null
+                );
+            }
+
+            @Override
+            public JsonElement serialize(ContentItem content, Type type, JsonSerializationContext context)
+            {
+                JsonObject object = new JsonObject();
+                object.addProperty( "id", ( content.getId() == null ) ? "minecraft:air" : content.getId() );
+                if ( content.getCount() != -1 )
+                {
+                    object.addProperty( "Count", content.getCount() );
+                }
+                if ( content.getTag() != null )
+                {
+                    object.add( "tag", context.serialize( content.getTag() ) );
+                }
+                return object;
+            }
+        }
+    }
 
     public enum Action
     {
 
         SHOW_TEXT,
-        SHOW_ACHIEVEMENT,
         SHOW_ITEM,
-        SHOW_ENTITY
+        SHOW_ENTITY,
+        /**
+         * Removed since 1.12. Advancements instead simply use show_text. The ID
+         * of an achievement or statistic to display. Example: new
+         * ComponentText( "achievement.openInventory" )
+         */
+        @Deprecated
+        SHOW_ACHIEVEMENT,
+    }
+
+    /**
+     * Gets the appropriate {@link Content} class for an {@link Action} for the
+     * GSON serialization
+     *
+     * @param action the action to get for
+     * @param array if to return the arrayed class
+     * @return the class
+     */
+    public static Class<?> getClass(HoverEvent.Action action, boolean array)
+    {
+        Preconditions.checkArgument( action != null, "action" );
+
+        switch ( action )
+        {
+            case SHOW_TEXT:
+                return ( array ) ? HoverEvent.ContentText[].class : HoverEvent.ContentText.class;
+            case SHOW_ENTITY:
+                return ( array ) ? HoverEvent.ContentEntity[].class : HoverEvent.ContentEntity.class;
+            case SHOW_ITEM:
+                return ( array ) ? HoverEvent.ContentItem[].class : HoverEvent.ContentItem.class;
+            default:
+                throw new UnsupportedOperationException( "Action '" + action.name() + " not supported" );
+        }
     }
 }

chat/src/main/java/net/md_5/bungee/api/chat/ItemTag.java

@@ -0,0 +1,158 @@
+package net.md_5.bungee.api.chat;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.List;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.EqualsAndHashCode;
+import lombok.RequiredArgsConstructor;
+import lombok.Setter;
+import lombok.Singular;
+import lombok.ToString;
+
+/**
+ * Metadata for use in conjunction with {@link HoverEvent.Action#SHOW_ITEM}
+ */
+@ToString(callSuper = true)
+@Setter
+@Builder(builderClassName = "Builder", access = AccessLevel.PUBLIC)
+@AllArgsConstructor
+@EqualsAndHashCode
+public final class ItemTag
+{
+
+    private BaseComponent name;
+    @Singular("ench")
+    private List<Enchantment> enchantments = new ArrayList<>();
+    @Singular("lore")
+    private List<BaseComponent[]> lore = new ArrayList<>();
+    private Boolean unbreakable;
+
+    private ItemTag()
+    {
+    }
+
+    @RequiredArgsConstructor
+    public static class Enchantment
+    {
+
+        private final int level;
+        private final int id;
+    }
+
+    public static class Serializer implements JsonSerializer<ItemTag>, JsonDeserializer<ItemTag>
+    {
+
+        @Override
+        public ItemTag deserialize(JsonElement element, Type type, JsonDeserializationContext context) throws JsonParseException
+        {
+            ItemTag itemTag = new ItemTag();
+            JsonObject object = element.getAsJsonObject();
+            if ( object.has( "ench" ) )
+            {
+                for ( JsonElement jsonElement : object.get( "ench" ).getAsJsonArray() )
+                {
+                    JsonObject next = jsonElement.getAsJsonObject();
+                    itemTag.enchantments.add( new Enchantment( next.get( "id" ).getAsInt(), next.get( "lvl" ).getAsInt() ) );
+                }
+            }
+            if ( object.has( "Unbreakable" ) )
+            {
+                int status = object.get( "Unbreakable" ).getAsInt();
+                if ( status == 1 )
+                {
+                    itemTag.unbreakable = true;
+                } else if ( status == 0 )
+                {
+                    itemTag.unbreakable = false;
+                }
+            }
+            if ( object.has( "display" ) )
+            {
+                JsonObject display = object.get( "display" ).getAsJsonObject();
+                if ( display.has( "Name" ) )
+                {
+                    itemTag.name = context.deserialize( display.get( "Name" ).getAsJsonObject(), BaseComponent.class );
+                }
+
+                if ( display.has( "Lore" ) )
+                {
+                    JsonElement lore = display.get( "Lore" );
+                    if ( lore.isJsonArray() )
+                    {
+                        for ( JsonElement loreIt : lore.getAsJsonArray() )
+                        {
+                            if ( loreIt.isJsonArray() )
+                            {
+                                itemTag.lore.add( context.deserialize( loreIt, BaseComponent[].class ) );
+                            } else
+                            {
+                                itemTag.lore.add( new BaseComponent[]
+                                {
+                                    context.deserialize( loreIt, BaseComponent.class )
+                                } );
+                            }
+                        }
+                    } else
+                    {
+                        itemTag.lore.add( context.deserialize( display.get( "Lore" ), BaseComponent[].class ) );
+                    }
+                }
+            }
+            return itemTag;
+        }
+
+        @Override
+        public JsonElement serialize(ItemTag itemTag, Type type, JsonSerializationContext context)
+        {
+            JsonObject object = new JsonObject();
+
+            if ( !itemTag.enchantments.isEmpty() )
+            {
+                JsonArray enchArray = new JsonArray();
+                for ( Enchantment ench : itemTag.enchantments )
+                {
+                    JsonObject enchObj = new JsonObject();
+                    enchObj.addProperty( "id", ench.id );
+                    enchObj.addProperty( "lvl", ench.level );
+                    enchArray.add( enchObj );
+                }
+                object.add( "ench", enchArray );
+            }
+
+            if ( itemTag.unbreakable != null )
+            {
+                object.addProperty( "Unbreakable", ( itemTag.unbreakable ) ? 1 : 0 );
+            }
+
+            JsonObject display = new JsonObject();
+
+            if ( itemTag.name != null )
+            {
+                display.add( "Name", context.serialize( itemTag.name ) );
+            }
+
+            if ( !itemTag.lore.isEmpty() )
+            {
+                display.add( "Lore", context.serialize( itemTag.lore ) );
+            }
+
+            if ( display.size() != 0 )
+            {
+                object.add( "display", display );
+            }
+
+            return object;
+        }
+    }
+}

chat/src/main/java/net/md_5/bungee/chat/BaseComponentSerializer.java

@@ -2,8 +2,10 @@ package net.md_5.bungee.chat;
 
 import com.google.common.base.Preconditions;
 import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonSerializationContext;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.IdentityHashMap;
@@ -52,7 +54,7 @@ public class BaseComponentSerializer
         }
         if ( object.has( "extra" ) )
         {
-            component.setExtra( Arrays.<BaseComponent>asList( context.<BaseComponent[]>deserialize( object.get( "extra" ), BaseComponent[].class ) ) );
+            component.setExtra( Arrays.asList( context.<BaseComponent[]>deserialize( object.get( "extra" ), BaseComponent[].class ) ) );
         }
 
         //Events
@@ -66,18 +68,34 @@ public class BaseComponentSerializer
         if ( object.has( "hoverEvent" ) )
         {
             JsonObject event = object.getAsJsonObject( "hoverEvent" );
-            BaseComponent[] res;
-            if ( event.get( "value" ).isJsonArray() )
+            HoverEvent hoverEvent = null;
+            HoverEvent.Action action = HoverEvent.Action.valueOf( event.get( "action" ).getAsString().toUpperCase( Locale.ROOT ) );
+
+            if ( event.has( "value" ) )
             {
-                res = context.deserialize( event.get( "value" ), BaseComponent[].class );
+                HoverEvent.Content[] ret = new HoverEvent.Content[]
+                {
+                    context.deserialize( event.get( "value" ), HoverEvent.getClass( action, false ) )
+                };
+                hoverEvent = new HoverEvent( action, ret );
+            } else if ( event.has( "contents" ) )
+            {
+                HoverEvent.Content[] list;
+                JsonElement contents = event.get( "contents" );
+                if ( contents.isJsonArray() )
+                {
+                    list = context.deserialize( contents, HoverEvent.getClass( action, true ) );
                 } else
                 {
-                res = new BaseComponent[]
+                    list = new HoverEvent.Content[]
                     {
-                    context.<BaseComponent>deserialize( event.get( "value" ), BaseComponent.class )
+                        context.deserialize( contents, HoverEvent.getClass( action, false ) )
                     };
                 }
-            component.setHoverEvent( new HoverEvent( HoverEvent.Action.valueOf( event.get( "action" ).getAsString().toUpperCase( Locale.ROOT ) ), res ) );
+
+                hoverEvent = new HoverEvent( action, new ArrayList<>( Arrays.asList( list ) ) );
+            }
+            component.setHoverEvent( hoverEvent );
         }
     }
 
@@ -143,7 +161,13 @@ public class BaseComponentSerializer
             {
                 JsonObject hoverEvent = new JsonObject();
                 hoverEvent.addProperty( "action", component.getHoverEvent().getAction().toString().toLowerCase( Locale.ROOT ) );
-                hoverEvent.add( "value", context.serialize( component.getHoverEvent().getValue() ) );
+                if ( component.getHoverEvent().isLegacy() )
+                {
+                    hoverEvent.add( "value", context.serialize( component.getHoverEvent().getContents().get( 0 ) ) );
+                } else
+                {
+                    hoverEvent.add( "contents", context.serialize( component.getHoverEvent().getContents() ) );
+                }
                 object.add( "hoverEvent", hoverEvent );
             }
         } finally

chat/src/main/java/net/md_5/bungee/chat/ComponentSerializer.java

@@ -11,6 +11,8 @@ import com.google.gson.JsonParser;
 import java.lang.reflect.Type;
 import java.util.Set;
 import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.api.chat.HoverEvent;
+import net.md_5.bungee.api.chat.ItemTag;
 import net.md_5.bungee.api.chat.KeybindComponent;
 import net.md_5.bungee.api.chat.ScoreComponent;
 import net.md_5.bungee.api.chat.SelectorComponent;
@@ -28,6 +30,10 @@ public class ComponentSerializer implements JsonDeserializer<BaseComponent>
             registerTypeAdapter( KeybindComponent.class, new KeybindComponentSerializer() ).
             registerTypeAdapter( ScoreComponent.class, new ScoreComponentSerializer() ).
             registerTypeAdapter( SelectorComponent.class, new SelectorComponentSerializer() ).
+            registerTypeAdapter( HoverEvent.ContentEntity.class, new HoverEvent.ContentEntity.Serializer() ).
+            registerTypeAdapter( HoverEvent.ContentText.class, new HoverEvent.ContentText.Serializer() ).
+            registerTypeAdapter( HoverEvent.ContentItem.class, new HoverEvent.ContentItem.Serializer() ).
+            registerTypeAdapter( ItemTag.class, new ItemTag.Serializer() ).
             create();
 
     public static final ThreadLocal<Set<BaseComponent>> serializedComponents = new ThreadLocal<Set<BaseComponent>>();

chat/src/main/java/net/md_5/bungee/chat/TextComponentSerializer.java

@@ -30,11 +30,11 @@ public class TextComponentSerializer extends BaseComponentSerializer implements
     {
         List<BaseComponent> extra = src.getExtra();
         JsonObject object = new JsonObject();
+        object.addProperty( "text", src.getText() );
         if ( src.hasFormatting() || ( extra != null && !extra.isEmpty() ) )
         {
             serialize( object, src, context );
         }
-        object.addProperty( "text", src.getText() );
         return object;
     }
 }

chat/src/test/java/net/md_5/bungee/api/chat/ComponentsTest.java

@@ -124,6 +124,70 @@ public class ComponentsTest
         );
     }
 
+    @Test
+    public void testItemTag()
+    {
+        TextComponent component = new TextComponent( "Hello world" );
+        HoverEvent.ContentItem content = new HoverEvent.ContentItem();
+        content.setId( "minecraft:diamond_sword" );
+        content.setCount( 1 );
+        content.setTag( ItemTag.builder()
+                .ench( new ItemTag.Enchantment( 5, 16 ) )
+                .name( new TextComponent( "Sharp Sword" ) )
+                .unbreakable( true )
+                .lore( new ComponentBuilder( "Line1" ).create() )
+                .lore( new ComponentBuilder( "Line2" ).create() )
+                .build() );
+        HoverEvent event = new HoverEvent( HoverEvent.Action.SHOW_ITEM, content );
+        component.setHoverEvent( event );
+        String serialised = ComponentSerializer.toString( component );
+        BaseComponent[] deserialised = ComponentSerializer.parse( serialised );
+        Assert.assertEquals( TextComponent.toLegacyText( deserialised ), TextComponent.toLegacyText( component ) );
+    }
+
+    @Test
+    public void testModernShowAdvancement()
+    {
+        String advancement = "achievement.openInventory";
+        // First do the text using the newer contents system
+        HoverEvent hoverEvent = new HoverEvent(
+                HoverEvent.Action.SHOW_TEXT,
+                new HoverEvent.ContentText( advancement )
+        );
+        TextComponent component = new TextComponent( "test" );
+        component.setHoverEvent( hoverEvent );
+        Assert.assertEquals( component.getHoverEvent().getContents().size(), 1 );
+        Assert.assertTrue( component.getHoverEvent().getContents().get( 0 ) instanceof HoverEvent.ContentText );
+        Assert.assertEquals( ( (HoverEvent.ContentText) component.getHoverEvent().getContents().get( 0 ) ).getValue(), advancement );
+    }
+
+    @Test
+    public void testHoverEventContents()
+    {
+        // First do the text using the newer contents system
+        HoverEvent hoverEvent = new HoverEvent(
+                HoverEvent.Action.SHOW_TEXT,
+                new HoverEvent.ContentText( new ComponentBuilder( "First" ).create() ),
+                new HoverEvent.ContentText( new ComponentBuilder( "Second" ).create() )
+        );
+
+        TextComponent component = new TextComponent( "Sample text" );
+        component.setHoverEvent( hoverEvent );
+        Assert.assertEquals( hoverEvent.getContents().size(), 2 );
+        Assert.assertFalse( hoverEvent.isLegacy() );
+        String serialized = ComponentSerializer.toString( component );
+        BaseComponent[] deserialized = ComponentSerializer.parse( serialized );
+        Assert.assertEquals( component.getHoverEvent(), deserialized[0].getHoverEvent() );
+
+        // check the test still works with the value method
+        hoverEvent = new HoverEvent( HoverEvent.Action.SHOW_TEXT, new ComponentBuilder( "Sample text" ).create() );
+        Assert.assertEquals( hoverEvent.getContents().size(), 1 );
+        Assert.assertTrue( hoverEvent.isLegacy() );
+        serialized = ComponentSerializer.toString( component );
+        deserialized = ComponentSerializer.parse( serialized );
+        Assert.assertEquals( component.getHoverEvent(), deserialized[0].getHoverEvent() );
+    }
+
     @Test
     public void testFormatRetentionCopyFormatting()
     {

proxy/src/main/java/net/md_5/bungee/BungeeCord.java

@@ -90,7 +90,6 @@ import net.md_5.bungee.module.ModuleManager;
 import net.md_5.bungee.netty.PipelineUtils;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
-import net.md_5.bungee.protocol.packet.Chat;
 import net.md_5.bungee.protocol.packet.PluginMessage;
 import net.md_5.bungee.query.RemoteQuery;
 import net.md_5.bungee.scheduler.BungeeScheduler;
@@ -707,14 +706,20 @@ public class BungeeCord extends ProxyServer
     public void broadcast(BaseComponent... message)
     {
         getConsole().sendMessage( BaseComponent.toLegacyText( message ) );
-        broadcast( new Chat( ComponentSerializer.toString( message ) ) );
+        for ( ProxiedPlayer player : getPlayers() )
+        {
+            player.sendMessage( message );
+        }
     }
 
     @Override
     public void broadcast(BaseComponent message)
     {
         getConsole().sendMessage( message.toLegacyText() );
-        broadcast( new Chat( ComponentSerializer.toString( message ) ) );
+        for ( ProxiedPlayer player : getPlayers() )
+        {
+            player.sendMessage( message );
+        }
     }
 
     public void addConnection(UserConnection con)

proxy/src/main/java/net/md_5/bungee/UserConnection.java

@@ -450,7 +450,7 @@ public final class UserConnection implements ProxiedPlayer
     public void sendMessage(ChatMessageType position, BaseComponent... message)
     {
         // transform score components
-        message = ChatComponentTransformer.getInstance().transform( this, message );
+        message = ChatComponentTransformer.getInstance().transform( this, true, message );
 
         if ( position == ChatMessageType.ACTION_BAR )
         {
@@ -475,7 +475,7 @@ public final class UserConnection implements ProxiedPlayer
     @Override
     public void sendMessage(ChatMessageType position, BaseComponent message)
     {
-        message = ChatComponentTransformer.getInstance().transform( this, message )[0];
+        message = ChatComponentTransformer.getInstance().transform( this, true, message )[0];
 
         // Action bar doesn't display the new JSON formattings, legacy works - send it using this for now
         if ( position == ChatMessageType.ACTION_BAR )
@@ -663,8 +663,8 @@ public final class UserConnection implements ProxiedPlayer
     @Override
     public void setTabHeader(BaseComponent header, BaseComponent footer)
     {
-        header = ChatComponentTransformer.getInstance().transform( this, header )[0];
-        footer = ChatComponentTransformer.getInstance().transform( this, footer )[0];
+        header = ChatComponentTransformer.getInstance().transform( this, true, header )[0];
+        footer = ChatComponentTransformer.getInstance().transform( this, true, footer )[0];
 
         unsafe().sendPacket( new PlayerListHeaderFooter(
                 ComponentSerializer.toString( header ),
@@ -675,8 +675,8 @@ public final class UserConnection implements ProxiedPlayer
     @Override
     public void setTabHeader(BaseComponent[] header, BaseComponent[] footer)
     {
-        header = ChatComponentTransformer.getInstance().transform( this, header );
-        footer = ChatComponentTransformer.getInstance().transform( this, footer );
+        header = ChatComponentTransformer.getInstance().transform( this, true, header );
+        footer = ChatComponentTransformer.getInstance().transform( this, true, footer );
 
         unsafe().sendPacket( new PlayerListHeaderFooter(
                 ComponentSerializer.toString( header ),

proxy/src/main/java/net/md_5/bungee/util/ChatComponentTransformer.java

@@ -7,10 +7,12 @@ import java.util.regex.Pattern;
 import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
 import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.api.chat.HoverEvent;
 import net.md_5.bungee.api.chat.ScoreComponent;
 import net.md_5.bungee.api.chat.TextComponent;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
 import net.md_5.bungee.api.score.Score;
+import net.md_5.bungee.protocol.ProtocolConstants;
 
 /**
  * This class transforms chat components by attempting to replace transformable
@@ -32,6 +34,32 @@ public final class ChatComponentTransformer
      */
     private static final Pattern SELECTOR_PATTERN = Pattern.compile( "^@([pares])(?:\\[([^ ]*)\\])?$" );
 
+    public BaseComponent[] legacyHoverTransform(ProxiedPlayer player, BaseComponent... components)
+    {
+        if ( player.getPendingConnection().getVersion() < ProtocolConstants.MINECRAFT_1_16 )
+        {
+            for ( int i = 0; i < components.length; i++ )
+            {
+                BaseComponent next = components[i];
+                if ( next.getHoverEvent().isLegacy() )
+                {
+                    continue;
+                }
+                next = next.duplicate();
+                next.getHoverEvent().setLegacy( true );
+                if ( next.getHoverEvent().getContents().size() > 1 )
+                {
+                    HoverEvent.Content exception = next.getHoverEvent().getContents().get( 0 );
+                    next.getHoverEvent().getContents().clear();
+                    next.getHoverEvent().getContents().add( exception );
+                }
+                components[i] = next;
+            }
+        }
+
+        return components;
+    }
+
     public static ChatComponentTransformer getInstance()
     {
         return INSTANCE;
@@ -44,14 +72,33 @@ public final class ChatComponentTransformer
      * {@link BaseComponent#getExtra()}).
      *
      * @param player player
-     * @param component the component to transform
+     * @param components the component to transform
      * @return the transformed component, or an array containing a single empty
      * TextComponent if the components are null or empty
      * @throws IllegalArgumentException if an entity selector pattern is present
      */
-    public BaseComponent[] transform(ProxiedPlayer player, BaseComponent... component)
+    public BaseComponent[] transform(ProxiedPlayer player, BaseComponent... components)
     {
-        if ( component == null || component.length < 1 || ( component.length == 1 && component[0] == null ) )
+        return transform( player, false, components );
+    }
+
+    /**
+     * Transform a set of components, and attempt to transform the transformable
+     * fields. Entity selectors <b>cannot</b> be evaluated. This will
+     * recursively search for all extra components (see
+     * {@link BaseComponent#getExtra()}).
+     *
+     * @param player player
+     * @param transformHover if the hover event should replace contents with
+     * value
+     * @param components the component to transform
+     * @return the transformed component, or an array containing a single empty
+     * TextComponent if the components are null or empty
+     * @throws IllegalArgumentException if an entity selector pattern is present
+     */
+    public BaseComponent[] transform(ProxiedPlayer player, boolean transformHover, BaseComponent... components)
+    {
+        if ( components == null || components.length < 1 || ( components.length == 1 && components[0] == null ) )
         {
             return new BaseComponent[]
             {
@@ -59,7 +106,12 @@ public final class ChatComponentTransformer
             };
         }
 
-        for ( BaseComponent root : component )
+        if ( transformHover )
+        {
+            components = legacyHoverTransform( player, components );
+        }
+
+        for ( BaseComponent root : components )
         {
             if ( root.getExtra() != null && !root.getExtra().isEmpty() )
             {
@@ -72,7 +124,7 @@ public final class ChatComponentTransformer
                 transformScoreComponent( player, (ScoreComponent) root );
             }
         }
-        return component;
+        return components;
     }
 
     /**