Paper/nms-patches/EntityHuman.patch

--- a/net/minecraft/server/EntityHuman.java
+++ b/net/minecraft/server/EntityHuman.java
@@ -12,6 +12,18 @@
 import java.util.function.Predicate;
 import javax.annotation.Nullable;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+import org.bukkit.entity.Item;
+import org.bukkit.entity.Player;
+import org.bukkit.event.entity.CreatureSpawnEvent;
+import org.bukkit.event.entity.EntityCombustByEntityEvent;
+import org.bukkit.event.player.PlayerBedLeaveEvent;
+import org.bukkit.event.player.PlayerDropItemEvent;
+import org.bukkit.event.player.PlayerVelocityEvent;
+import org.bukkit.util.Vector;
+// CraftBukkit end
+
 public abstract class EntityHuman extends EntityLiving {
 
     private static final DataWatcherObject<Float> a = DataWatcher.a(EntityHuman.class, DataWatcherRegistry.c);
@@ -21,10 +33,10 @@
     protected static final DataWatcherObject<NBTTagCompound> bz = DataWatcher.a(EntityHuman.class, DataWatcherRegistry.p);
     protected static final DataWatcherObject<NBTTagCompound> bA = DataWatcher.a(EntityHuman.class, DataWatcherRegistry.p);
     public PlayerInventory inventory = new PlayerInventory(this);
-    protected InventoryEnderChest enderChest = new InventoryEnderChest();
+    protected InventoryEnderChest enderChest = new InventoryEnderChest(this); // CraftBukkit - add "this" to constructor
     public Container defaultContainer;
     public Container activeContainer;
-    protected FoodMetaData foodData = new FoodMetaData();
+    protected FoodMetaData foodData = new FoodMetaData(this); // CraftBukkit - add "this" to constructor
     protected int bG;
     public float bH;
     public float bI;
@@ -57,6 +69,17 @@
     @Nullable
     public EntityFishingHook hookedFish;
 
+    // CraftBukkit start
+    public boolean fauxSleeping;
+    public String spawnWorld = "";
+    public int oldLevel = -1;
+
+    @Override
+    public CraftHumanEntity getBukkitEntity() {
+        return (CraftHumanEntity) super.getBukkitEntity();
+    }
+    // CraftBukkit end
+
     public EntityHuman(World world, GameProfile gameprofile) {
         super(EntityTypes.PLAYER, world);
         this.cd = ItemStack.a;
@@ -181,7 +204,7 @@
         ItemStack itemstack = this.getEquipment(EnumItemSlot.HEAD);
 
         if (itemstack.getItem() == Items.TURTLE_HELMET && !this.a(TagsFluid.WATER)) {
-            this.addEffect(new MobEffect(MobEffects.WATER_BREATHING, 200, 0, false, false, true));
+            this.addEffect(new MobEffect(MobEffects.WATER_BREATHING, 200, 0, false, false, true), org.bukkit.event.entity.EntityPotionEffectEvent.Cause.TURTLE_HELMET); // CraftBukkit
         }
 
     }
@@ -366,7 +389,8 @@
 
         if (this.world.getDifficulty() == EnumDifficulty.PEACEFUL && this.world.getGameRules().getBoolean("naturalRegeneration")) {
             if (this.getHealth() < this.getMaxHealth() && this.ticksLived % 20 == 0) {
-                this.heal(1.0F);
+                // CraftBukkit - added regain reason of "REGEN" for filtering purposes.
+                this.heal(1.0F, org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason.REGEN);
             }
 
             if (this.foodData.c() && this.ticksLived % 10 == 0) {
@@ -390,7 +414,7 @@
 
         this.o((float) attributeinstance.getValue());
         float f = MathHelper.sqrt(this.motX * this.motX + this.motZ * this.motZ);
-        float f1 = (float) (Math.atan(-this.motY * 0.20000000298023224D) * 15.0D);
+        float f1 = (float) ( org.bukkit.craftbukkit.TrigMath.atan(-this.motY * 0.20000000298023224D) * 15.0D); // CraftBukkit
 
         if (f > 0.1F) {
             f = 0.1F;
@@ -513,6 +537,7 @@
 
     @Nullable
     public EntityItem a(boolean flag) {
+        // Called only when dropped by Q or CTRL-Q
         return this.a(this.inventory.splitStack(this.inventory.itemInHandIndex, flag && !this.inventory.getItemInHand().isEmpty() ? this.inventory.getItemInHand().getCount() : 1), false, true);
     }
 
@@ -555,6 +580,30 @@
                 entityitem.motZ += Math.sin((double) f1) * (double) f;
             }
 
+            // CraftBukkit start - fire PlayerDropItemEvent
+            Player player = (Player) this.getBukkitEntity();
+            Item drop = (Item) entityitem.getBukkitEntity();
+
+            PlayerDropItemEvent event = new PlayerDropItemEvent(player, drop);
+            this.world.getServer().getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                org.bukkit.inventory.ItemStack cur = player.getInventory().getItemInHand();
+                if (flag1 && (cur == null || cur.getAmount() == 0)) {
+                    // The complete stack was dropped
+                    player.getInventory().setItemInHand(drop.getItemStack());
+                } else if (flag1 && cur.isSimilar(drop.getItemStack()) && cur.getAmount() < cur.getMaxStackSize() && drop.getItemStack().getAmount() == 1) {
+                    // Only one item is dropped
+                    cur.setAmount(cur.getAmount() + 1);
+                    player.getInventory().setItemInHand(cur);
+                } else {
+                    // Fallback
+                    player.getInventory().addItem(drop.getItemStack());
+                }
+                return null;
+            }
+            // CraftBukkit end
+
             ItemStack itemstack1 = this.a(entityitem);
 
             if (flag1) {
@@ -649,6 +698,13 @@
             this.a(true, true, false);
         }
 
+        // CraftBukkit start
+        this.spawnWorld = nbttagcompound.getString("SpawnWorld");
+        if ("".equals(spawnWorld)) {
+            this.spawnWorld = this.world.getServer().getWorlds().get(0).getName();
+        }
+        // CraftBukkit end
+
         if (nbttagcompound.hasKeyOfType("SpawnX", 99) && nbttagcompound.hasKeyOfType("SpawnY", 99) && nbttagcompound.hasKeyOfType("SpawnZ", 99)) {
             this.e = new BlockPosition(nbttagcompound.getInt("SpawnX"), nbttagcompound.getInt("SpawnY"), nbttagcompound.getInt("SpawnZ"));
             this.f = nbttagcompound.getBoolean("SpawnForced");
@@ -699,6 +755,7 @@
         if (!this.getShoulderEntityRight().isEmpty()) {
             nbttagcompound.set("ShoulderEntityRight", this.getShoulderEntityRight());
         }
+        nbttagcompound.setString("SpawnWorld", spawnWorld); // CraftBukkit - fixes bed spawns for multiworld worlds
 
     }
 
@@ -716,10 +773,10 @@
                     this.a(true, true, false);
                 }
 
-                this.releaseShoulderEntities();
+                // this.releaseShoulderEntities(); // CraftBukkit - moved down
                 if (damagesource.s()) {
                     if (this.world.getDifficulty() == EnumDifficulty.PEACEFUL) {
-                        f = 0.0F;
+                        return false; // CraftBukkit - f = 0.0f -> return false
                     }
 
                     if (this.world.getDifficulty() == EnumDifficulty.EASY) {
@@ -731,7 +788,13 @@
                     }
                 }
 
-                return f == 0.0F ? false : super.damageEntity(damagesource, f);
+                // CraftBukkit start - Don't filter out 0 damage
+                boolean damaged = super.damageEntity(damagesource, f);
+                if (damaged) {
+                    this.releaseShoulderEntities();
+                }
+                return damaged;
+                // CraftBukkit end
             }
         }
     }
@@ -745,10 +808,29 @@
     }
 
     public boolean a(EntityHuman entityhuman) {
-        ScoreboardTeamBase scoreboardteambase = this.getScoreboardTeam();
-        ScoreboardTeamBase scoreboardteambase1 = entityhuman.getScoreboardTeam();
+        // CraftBukkit start - Change to check OTHER player's scoreboard team according to API
+        // To summarize this method's logic, it's "Can parameter hurt this"
+        org.bukkit.scoreboard.Team team;
+        if (entityhuman instanceof EntityPlayer) {
+            EntityPlayer thatPlayer = (EntityPlayer) entityhuman;
+            team = thatPlayer.getBukkitEntity().getScoreboard().getPlayerTeam(thatPlayer.getBukkitEntity());
+            if (team == null || team.allowFriendlyFire()) {
+                return true;
+            }
+        } else {
+            // This should never be called, but is implemented anyway
+            org.bukkit.OfflinePlayer thisPlayer = entityhuman.world.getServer().getOfflinePlayer(entityhuman.getName());
+            team = entityhuman.world.getServer().getScoreboardManager().getMainScoreboard().getPlayerTeam(thisPlayer);
+            if (team == null || team.allowFriendlyFire()) {
+                return true;
+            }
+        }
 
-        return scoreboardteambase == null ? true : (!scoreboardteambase.isAlly(scoreboardteambase1) ? true : scoreboardteambase.allowFriendlyFire());
+        if (this instanceof EntityPlayer) {
+            return !team.hasPlayer(((EntityPlayer) this).getBukkitEntity());
+        }
+        return !team.hasPlayer(this.world.getServer().getOfflinePlayer(this.getName()));
+        // CraftBukkit end
     }
 
     protected void damageArmor(float f) {
@@ -791,7 +873,12 @@
         return (float) i / (float) this.inventory.armor.size();
     }
 
-    protected void damageEntity0(DamageSource damagesource, float f) {
+    // CraftBukkit start
+    protected boolean damageEntity0(DamageSource damagesource, float f) { // void -> boolean
+        if (true) {
+            return super.damageEntity0(damagesource, f);
+        }
+        // CraftBukkit end
         if (!this.isInvulnerable(damagesource)) {
             f = this.applyArmorModifier(damagesource, f);
             f = this.applyMagicModifier(damagesource, f);
@@ -817,6 +904,7 @@
 
             }
         }
+        return false; // CraftBukkit
     }
 
     public void openSign(TileEntitySign tileentitysign) {}
@@ -938,8 +1026,15 @@
                     if (entity instanceof EntityLiving) {
                         f3 = ((EntityLiving) entity).getHealth();
                         if (j > 0 && !entity.isBurning()) {
-                            flag4 = true;
-                            entity.setOnFire(1);
+                            // CraftBukkit start - Call a combust event when somebody hits with a fire enchanted item
+                            EntityCombustByEntityEvent combustEvent = new EntityCombustByEntityEvent(this.getBukkitEntity(), entity.getBukkitEntity(), 1);
+                            org.bukkit.Bukkit.getPluginManager().callEvent(combustEvent);
+
+                            if (!combustEvent.isCancelled()) {
+                                flag4 = true;
+                                entity.setOnFire(combustEvent.getDuration(), false);
+                            }
+                            // CraftBukkit end
                         }
                     }
 
@@ -970,8 +1065,11 @@
                                 EntityLiving entityliving = (EntityLiving) iterator.next();
 
                                 if (entityliving != this && entityliving != entity && !this.r(entityliving) && (!(entityliving instanceof EntityArmorStand) || !((EntityArmorStand) entityliving).isMarker()) && this.h(entityliving) < 9.0D) {
+                                    // CraftBukkit start - Only apply knockback if the damage hits
+                                    if (entityliving.damageEntity(DamageSource.playerAttack(this).sweep(), f4)) {
                                     entityliving.a(this, 0.4F, (double) MathHelper.sin(this.yaw * 0.017453292F), (double) (-MathHelper.cos(this.yaw * 0.017453292F)));
-                                    entityliving.damageEntity(DamageSource.playerAttack(this), f4);
+                                    }
+                                    // CraftBukkit end
                                 }
                             }
 
@@ -980,11 +1078,28 @@
                         }
 
                         if (entity instanceof EntityPlayer && entity.velocityChanged) {
+                            // CraftBukkit start - Add Velocity Event
+                            boolean cancelled = false;
+                            Player player = (Player) entity.getBukkitEntity();
+                            org.bukkit.util.Vector velocity = new Vector( d1, d2, d3 );
+
+                            PlayerVelocityEvent event = new PlayerVelocityEvent(player, velocity.clone());
+                            world.getServer().getPluginManager().callEvent(event);
+
+                            if (event.isCancelled()) {
+                                cancelled = true;
+                            } else if (!velocity.equals(event.getVelocity())) {
+                                player.setVelocity(event.getVelocity());
+                            }
+
+                            if (!cancelled) {
                             ((EntityPlayer) entity).playerConnection.sendPacket(new PacketPlayOutEntityVelocity(entity));
                             entity.velocityChanged = false;
                             entity.motX = d1;
                             entity.motY = d2;
                             entity.motZ = d3;
+                            }
+                            // CraftBukkit end
                         }
 
                         if (flag2) {
@@ -1033,7 +1148,14 @@
 
                             this.a(StatisticList.DAMAGE_DEALT, Math.round(f5 * 10.0F));
                             if (j > 0) {
-                                entity.setOnFire(j * 4);
+                                // CraftBukkit start - Call a combust event when somebody hits with a fire enchanted item
+                                EntityCombustByEntityEvent combustEvent = new EntityCombustByEntityEvent(this.getBukkitEntity(), entity.getBukkitEntity(), j * 4);
+                                org.bukkit.Bukkit.getPluginManager().callEvent(combustEvent);
+
+                                if (!combustEvent.isCancelled()) {
+                                    entity.setOnFire(combustEvent.getDuration());
+                                }
+                                // CraftBukkit end
                             }
 
                             if (this.world instanceof WorldServer && f5 > 2.0F) {
@@ -1049,6 +1171,11 @@
                         if (flag4) {
                             entity.extinguish();
                         }
+                        // CraftBukkit start - resync on cancelled event
+                        if (this instanceof EntityPlayer) {
+                            ((EntityPlayer) this).getBukkitEntity().updateInventory();
+                        }
+                        // CraftBukkit end
                     }
                 }
 
@@ -1110,15 +1237,15 @@
         return this.h;
     }
 
-    public EntityHuman.EnumBedResult a(BlockPosition blockposition) {
-        EnumDirection enumdirection = (EnumDirection) this.world.getType(blockposition).get(BlockFacingHorizontal.FACING);
-
+    // CraftBukkit start - moved bed result checks from below into separate method
+    private EntityHuman.EnumBedResult getBedResult(BlockPosition blockposition, EnumDirection enumdirection) {
         if (!this.world.isClientSide) {
             if (this.isSleeping() || !this.isAlive()) {
                 return EntityHuman.EnumBedResult.OTHER_PROBLEM;
             }
 
-            if (!this.world.worldProvider.isOverworld()) {
+            // CraftBukkit - moved world and biome check from BlockBed interact handling here
+            if (!world.worldProvider.canRespawn() || world.getBiome(blockposition) == Biomes.NETHER || !this.world.worldProvider.isOverworld()) {
                 return EntityHuman.EnumBedResult.NOT_POSSIBLE_HERE;
             }
 
@@ -1140,6 +1267,30 @@
                 }
             }
         }
+        return EntityHuman.EnumBedResult.OK;
+    }
+
+    public EntityHuman.EnumBedResult a(BlockPosition blockposition) {
+        // CraftBukkit start - moved checks into separate method above, add force
+        return this.a(blockposition, false);
+    }
+
+    public EntityHuman.EnumBedResult a(BlockPosition blockposition, boolean force) {
+        EnumDirection enumdirection = (EnumDirection) this.world.getType(blockposition).get(BlockFacingHorizontal.FACING);
+        EntityHuman.EnumBedResult bedResult = force ? EnumBedResult.OK : this.getBedResult(blockposition, enumdirection);
+
+        if (bedResult == EntityHuman.EnumBedResult.OTHER_PROBLEM) {
+            return bedResult; // return immediately if the result is not bypassable by plugins
+        }
+
+        if (this.getBukkitEntity() instanceof Player) {
+            bedResult = org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerBedEnterEvent(this, blockposition, bedResult);
+
+            if (bedResult != EntityHuman.EnumBedResult.OK) {
+                return bedResult;
+            }
+        }
+        // CraftBukkit end
 
         if (this.isPassenger()) {
             this.stopRiding();
@@ -1206,6 +1357,24 @@
             this.world.everyoneSleeping();
         }
 
+        // CraftBukkit start - fire PlayerBedLeaveEvent
+        if (this.getBukkitEntity() instanceof Player) {
+            Player player = (Player) this.getBukkitEntity();
+
+            org.bukkit.block.Block bed;
+            BlockPosition blockposition = this.bedPosition;
+            if (blockposition != null) {
+                bed = this.world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+            } else {
+                bed = this.world.getWorld().getBlockAt(player.getLocation());
+            }
+
+            PlayerBedLeaveEvent event = new PlayerBedLeaveEvent(player, bed, flag2);
+            this.world.getServer().getPluginManager().callEvent(event);
+            flag2 = event.shouldSetSpawnLocation();
+        }
+        // CraftBukkit end
+
         this.sleepTicks = flag ? 0 : 100;
         if (flag2) {
             this.setRespawnPosition(this.bedPosition, false);
@@ -1257,9 +1426,11 @@
         if (blockposition != null) {
             this.e = blockposition;
             this.f = flag;
+            this.spawnWorld = this.world.worldData.getName(); // CraftBukkit
         } else {
             this.e = null;
             this.f = false;
+            this.spawnWorld = ""; // CraftBukkit
         }
 
     }
@@ -1325,7 +1496,11 @@
             this.motY = d3 * 0.6D;
             this.aU = f3;
             this.fallDistance = 0.0F;
-            this.setFlag(7, false);
+            // CraftBukkit start
+            if (getFlag(7) && !org.bukkit.craftbukkit.event.CraftEventFactory.callToggleGlideEvent(this, false).isCancelled()) {
+                this.setFlag(7, false);
+            }
+            // CraftBukkit end
         } else {
             super.a(f, f1, f2);
         }
@@ -1625,13 +1800,17 @@
     }
 
     protected void releaseShoulderEntities() {
-        this.spawnEntityFromShoulder(this.getShoulderEntityLeft());
-        this.setShoulderEntityLeft(new NBTTagCompound());
-        this.spawnEntityFromShoulder(this.getShoulderEntityRight());
-        this.setShoulderEntityRight(new NBTTagCompound());
+        // CraftBukkit start
+        if (this.spawnEntityFromShoulder(this.getShoulderEntityLeft())) {
+            this.setShoulderEntityLeft(new NBTTagCompound());
+        }
+        if (this.spawnEntityFromShoulder(this.getShoulderEntityRight())) {
+            this.setShoulderEntityRight(new NBTTagCompound());
+        }
+        // CraftBukkit end
     }
 
-    private void spawnEntityFromShoulder(@Nullable NBTTagCompound nbttagcompound) {
+    private boolean spawnEntityFromShoulder(@Nullable NBTTagCompound nbttagcompound) { // CraftBukkit void->boolean
         if (!this.world.isClientSide && !nbttagcompound.isEmpty()) {
             Entity entity = EntityTypes.a(nbttagcompound, this.world);
 
@@ -1640,9 +1819,10 @@
             }
 
             entity.setPosition(this.locX, this.locY + 0.699999988079071D, this.locZ);
-            this.world.addEntity(entity);
+            return this.world.addEntity(entity, CreatureSpawnEvent.SpawnReason.SHOULDER_ENTITY); // CraftBukkit
         }
 
+        return true; // CraftBukkit
     }
 
     public abstract boolean isSpectator();