Reduce cooldown

bukkit/src/main/java/us/myles/ViaVersion/bukkit/platform/BukkitConfigAPI.java

@@ -185,6 +185,11 @@ public class BukkitConfigAPI extends Config implements ViaVersionConfig {
         return getString("reload-disconnect-msg", "Server reload, please rejoin!");
     }
 
+    @Override
+    public boolean isMinimizeCooldown() {
+        return getBoolean("minimize-cooldown", true);
+    }
+
     @Override
     public URL getDefaultConfigURL() {
         return BukkitConfigAPI.class.getClassLoader().getResource("assets/viaversion/config.yml");

bungee/src/main/java/us/myles/ViaVersion/bungee/platform/BungeeConfigAPI.java

@@ -224,6 +224,11 @@ public class BungeeConfigAPI extends Config implements ViaVersionConfig {
         return getString("reload-disconnect-msg", "Server reload, please rejoin!");
     }
 
+    @Override
+    public boolean isMinimizeCooldown() {
+        return getBoolean("minimize-cooldown", true);
+    }
+
     /**
      * What is the interval for checking servers via ping
      * -1 for disabled

common/src/main/java/us/myles/ViaVersion/api/Triple.java

@@ -0,0 +1,17 @@
+package us.myles.ViaVersion.api;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class Triple<A, B, C> {
+    private A first;
+    private B second;
+    private C third;
+
+    @Override
+    public String toString() {
+        return "Triple{" + first + ", " + second + ", " + third + '}';
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/ViaVersionConfig.java

@@ -245,4 +245,10 @@ public interface ViaVersionConfig {
      * @return Disconnect message
      */
     String getReloadDisconnectMsg();
+
+    /**
+     * Tries to minimize cooldown animation
+     * @return True if enabled
+     */
+    boolean isMinimizeCooldown();
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/packets/EntityPackets.java

@@ -1,6 +1,9 @@
 package us.myles.ViaVersion.protocols.protocol1_9to1_8.packets;
 
+import com.google.common.collect.ImmutableList;
 import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.Pair;
+import us.myles.ViaVersion.api.Triple;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.minecraft.item.Item;
 import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
@@ -17,7 +20,7 @@ import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9TO1_8;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.metadata.MetadataRewriter;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.EntityTracker;
 
-import java.util.List;
+import java.util.*;
 
 public class EntityPackets {
     public static final ValueTransformer<Byte, Short> toNewShort = new ValueTransformer<Byte, Short>(Type.SHORT) {
@@ -269,9 +272,64 @@ public class EntityPackets {
             }
         });
 
-        /* Packets which do not have any field remapping or handlers */
+        // Entity Properties Packet
+        protocol.registerOutgoing(State.PLAY, 0x20, 0x4B, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        if (!Via.getConfig().isMinimizeCooldown()) return;
+                        if (wrapper.get(Type.VAR_INT, 0) != wrapper.user().get(EntityTracker.class).getEntityID()) {
+                            return;
+                        }
+                        int propertiesToRead = wrapper.read(Type.INT);
+                        Map<String, Pair<Double, List<Triple<UUID, Double, Byte>>>> properties = new HashMap<>(propertiesToRead);
+                        for (int i = 0; i < propertiesToRead; i++) {
+                            String key = wrapper.read(Type.STRING);
+                            Double value = wrapper.read(Type.DOUBLE);
+                            int modifiersToRead = wrapper.read(Type.VAR_INT);
+                            List<Triple<UUID, Double, Byte>> modifiers = new ArrayList<>(modifiersToRead);
+                            for (int j = 0; j < modifiersToRead; j++) {
+                                modifiers.add(
+                                        new Triple<>(
+                                                wrapper.read(Type.UUID),
+                                                wrapper.read(Type.DOUBLE), // Amount
+                                                wrapper.read(Type.BYTE) // Operation
+                                        )
+                                );
+                            }
+                            properties.put(key, new Pair<>(value, modifiers));
+                        }
 
-        protocol.registerOutgoing(State.PLAY, 0x20, 0x4B); // Entity Properties Packet
+                        // == Why 15.9? ==
+                        // Higher values hides the cooldown but it bugs visual animation on hand
+                        // when removing item from hand with inventory gui
+                        properties.put("generic.attackSpeed", new Pair<Double, List<Triple<UUID, Double, Byte>>>(15.9, ImmutableList.of( // Neutralize modifiers
+                                new Triple<>(UUID.fromString("FA233E1C-4180-4865-B01B-BCCE9785ACA3"), 0.0, (byte) 0), // Tool and weapon modifier
+                                new Triple<>(UUID.fromString("AF8B6E3F-3328-4C0A-AA36-5BA2BB9DBEF3"), 0.0, (byte) 2), // Dig speed
+                                new Triple<>(UUID.fromString("55FCED67-E92A-486E-9800-B47F202C4386"), 0.0, (byte) 2) // Dig slow down
+                        )));
+
+                        wrapper.write(Type.INT, properties.size());
+                        for (Map.Entry<String, Pair<Double, List<Triple<UUID, Double, Byte>>>> entry : properties.entrySet()) {
+                            wrapper.write(Type.STRING, entry.getKey()); // Key
+                            wrapper.write(Type.DOUBLE, entry.getValue().getKey()); // Value
+                            wrapper.write(Type.VAR_INT, entry.getValue().getValue().size());
+                            for (Triple<UUID, Double, Byte> modifier : entry.getValue().getValue()) {
+                                wrapper.write(Type.UUID, modifier.getFirst());
+                                wrapper.write(Type.DOUBLE, modifier.getSecond()); // Amount
+                                wrapper.write(Type.BYTE, modifier.getThird()); // Operation
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+
+        /* Packets which do not have any field remapping or handlers */
 
         protocol.registerOutgoing(State.PLAY, 0x1A, 0x1B); // Entity Status Packet
         protocol.registerOutgoing(State.PLAY, 0x16, 0x27); // Entity Look Packet

common/src/main/resources/assets/viaversion/config.yml

@@ -124,3 +124,5 @@ replace-pistons: false
 replacement-piston-id: 0
 # Force the string -> json transform
 force-json-transform: false
+# Minimize the cooldown animation in 1.8 servers
+minimize-cooldown: true

sponge/src/main/java/us/myles/ViaVersion/sponge/platform/SpongeConfigAPI.java

@@ -206,6 +206,11 @@ public class SpongeConfigAPI extends Config implements ViaVersionConfig {
         return getString("reload-disconnect-msg", "Server reload, please rejoin!");
     }
 
+    @Override
+    public boolean isMinimizeCooldown() {
+        return getBoolean("minimize-cooldown", true);
+    }
+
     @Override
     public boolean is1_13TeamColourFix() {
         return getBoolean("team-colour-fix", true);