content: package net.minecraft.network.play.client;
  
  import net.minecraft.entity.player.PlayerCapabilities;
  import net.minecraft.network.Packet;
  import net.minecraft.network.PacketBuffer;
  import net.minecraft.network.play.INetHandlerPlayServer;
  
  import java.io.IOException;
  
  public class C13PacketPlayerAbilities implements Packet<INetHandlerPlayServer> {
      private boolean invulnerable;
      private boolean flying;
      private boolean allowFlying;
      private boolean creativeMode;
      private float flySpeed;
      private float walkSpeed;
  
      public C13PacketPlayerAbilities() {
      }
  
      public C13PacketPlayerAbilities(PlayerCapabilities capabilities) {
          this.setInvulnerable(capabilities.disableDamage);
          this.setFlying(capabilities.isFlying);
          this.setAllowFlying(capabilities.allowFlying);
          this.setCreativeMode(capabilities.isCreativeMode);
          this.setFlySpeed(capabilities.getFlySpeed());
          this.setWalkSpeed(capabilities.getWalkSpeed());
      }
  
      public void readPacketData(PacketBuffer buf) throws IOException {
          byte b0 = buf.readByte();
          this.setInvulnerable((b0 & 1) > 0);
          this.setFlying((b0 & 2) > 0);
          this.setAllowFlying((b0 & 4) > 0);
          this.setCreativeMode((b0 & 8) > 0);
          this.setFlySpeed(buf.readFloat());
          this.setWalkSpeed(buf.readFloat());
      }
  
      public void writePacketData(PacketBuffer buf) throws IOException {
          byte b0 = 0;
  
          if (this.isInvulnerable()) {
              b0 = (byte) (b0 | 1);
          }
  
          if (this.isFlying()) {
              b0 = (byte) (b0 | 2);
          }
  
          if (this.isAllowFlying()) {
              b0 = (byte) (b0 | 4);
          }
  
          if (this.isCreativeMode()) {
              b0 = (byte) (b0 | 8);
          }
  
          buf.writeByte(b0);
          buf.writeFloat(this.flySpeed);
          buf.writeFloat(this.walkSpeed);
      }
  
      public void processPacket(INetHandlerPlayServer handler) {
          handler.processPlayerAbilities(this);
      }
  
      public boolean isInvulnerable() {
          return this.invulnerable;
      }
  
      public void setInvulnerable(boolean isInvulnerable) {
          this.invulnerable = isInvulnerable;
      }
  
      public boolean isFlying() {
          return this.flying;
      }
  
      public void setFlying(boolean isFlying) {
          this.flying = isFlying;
      }
  
      public boolean isAllowFlying() {
          return this.allowFlying;
      }
  
      public void setAllowFlying(boolean isAllowFlying) {
          this.allowFlying = isAllowFlying;
      }
  
      public boolean isCreativeMode() {
          return this.creativeMode;
      }
  
      public void setCreativeMode(boolean isCreativeMode) {
          this.creativeMode = isCreativeMode;
      }
  
      public void setFlySpeed(float flySpeedIn) {
          this.flySpeed = flySpeedIn;
      }
  
      public void setWalkSpeed(float walkSpeedIn) {
          this.walkSpeed = walkSpeedIn;
      }
  }
  