From dbcab6f65b4134d092992d61898fbb9edfe1c87f Mon Sep 17 00:00:00 2001
From: BillyGalbreath <Blake.Galbreath@GMail.com>
Date: Sat, 21 Jul 2018 03:11:03 -0500
Subject: [PATCH] PlayerLaunchProjectileEvent


diff --git a/src/main/java/net/minecraft/server/ItemEgg.java b/src/main/java/net/minecraft/server/ItemEgg.java
index 2bdb65bf8..f526af45f 100644
--- a/src/main/java/net/minecraft/server/ItemEgg.java
+++ b/src/main/java/net/minecraft/server/ItemEgg.java
@@ -10,17 +10,35 @@ public class ItemEgg extends Item {
     public InteractionResultWrapper<ItemStack> a(World world, EntityHuman entityhuman, EnumHand enumhand) {
         ItemStack itemstack = entityhuman.b(enumhand);
 
+        /* // Paper start - moved down
         if (!entityhuman.abilities.canInstantlyBuild) {
             itemstack.subtract(1);
         }
 
         world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_EGG_THROW, SoundCategory.PLAYERS, 0.5F, 0.4F / (ItemEgg.i.nextFloat() * 0.4F + 0.8F));
+        */ // Paper end
         if (!world.isClientSide) {
             EntityEgg entityegg = new EntityEgg(world, entityhuman);
 
             entityegg.setItem(itemstack);
             entityegg.a(entityhuman, entityhuman.pitch, entityhuman.yaw, 0.0F, 1.5F, 1.0F);
-            world.addEntity(entityegg);
+            // Paper start
+            com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent event = new com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack), (org.bukkit.entity.Projectile) entityegg.getBukkitEntity());
+            if (event.callEvent() && world.addEntity(entityegg)) {
+                if (event.shouldConsume() && !entityhuman.abilities.canInstantlyBuild) {
+                    itemstack.subtract(1);
+                } else if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+
+                world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_EGG_THROW, SoundCategory.PLAYERS, 0.5F, 0.4F / (Entity.SHARED_RANDOM.nextFloat() * 0.4F + 0.8F));
+            } else {
+                if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+                return new InteractionResultWrapper(EnumInteractionResult.FAIL, itemstack);
+            }
+            // Paper end
         }
 
         entityhuman.b(StatisticList.ITEM_USED.b(this));
diff --git a/src/main/java/net/minecraft/server/ItemEnderPearl.java b/src/main/java/net/minecraft/server/ItemEnderPearl.java
index eb5f62dec..e8e52d726 100644
--- a/src/main/java/net/minecraft/server/ItemEnderPearl.java
+++ b/src/main/java/net/minecraft/server/ItemEnderPearl.java
@@ -16,7 +16,19 @@ public class ItemEnderPearl extends Item {
 
             entityenderpearl.setItem(itemstack);
             entityenderpearl.a(entityhuman, entityhuman.pitch, entityhuman.yaw, 0.0F, 1.5F, 1.0F);
-            if (!world.addEntity(entityenderpearl)) {
+            // Paper start
+            com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent event = new com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack), (org.bukkit.entity.Projectile) entityenderpearl.getBukkitEntity());
+            if (event.callEvent() && world.addEntity(entityenderpearl)) {
+                if (event.shouldConsume() && !entityhuman.abilities.canInstantlyBuild) {
+                    itemstack.subtract(1);
+                } else if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+
+                world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_ENDER_PEARL_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (Entity.SHARED_RANDOM.nextFloat() * 0.4F + 0.8F));
+                entityhuman.getCooldownTracker().a(this, 20);
+            } else {
+                // Paper end
                 if (entityhuman instanceof EntityPlayer) {
                     ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
                 }
@@ -24,13 +36,15 @@ public class ItemEnderPearl extends Item {
             }
         }
 
-        if (!entityhuman.abilities.canInstantlyBuild) {
-            itemstack.subtract(1);
-        }
-
-        world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_ENDER_PEARL_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (ItemEnderPearl.i.nextFloat() * 0.4F + 0.8F));
-        entityhuman.getCooldownTracker().a(this, 20);
-        // CraftBukkit end
+        // Paper start - moved up
+        //if (!entityhuman.abilities.canInstantlyBuild) {
+        //    itemstack.subtract(1);
+        //}
+        //
+        //world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_ENDER_PEARL_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (ItemEnderPearl.i.nextFloat() * 0.4F + 0.8F));
+        //entityhuman.getCooldownTracker().a(this, 20);
+        // // CraftBukkit end
+        // Paper end
 
         entityhuman.b(StatisticList.ITEM_USED.b(this));
         return new InteractionResultWrapper<>(EnumInteractionResult.SUCCESS, itemstack);
diff --git a/src/main/java/net/minecraft/server/ItemExpBottle.java b/src/main/java/net/minecraft/server/ItemExpBottle.java
index 35f842ede..eb626a6f0 100644
--- a/src/main/java/net/minecraft/server/ItemExpBottle.java
+++ b/src/main/java/net/minecraft/server/ItemExpBottle.java
@@ -9,18 +9,35 @@ public class ItemExpBottle extends Item {
     @Override
     public InteractionResultWrapper<ItemStack> a(World world, EntityHuman entityhuman, EnumHand enumhand) {
         ItemStack itemstack = entityhuman.b(enumhand);
-
+        /* // Paper start
         if (!entityhuman.abilities.canInstantlyBuild) {
             itemstack.subtract(1);
         }
 
         world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_EXPERIENCE_BOTTLE_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (ItemExpBottle.i.nextFloat() * 0.4F + 0.8F));
+        */ // Paper end
         if (!world.isClientSide) {
             EntityThrownExpBottle entitythrownexpbottle = new EntityThrownExpBottle(world, entityhuman);
 
             entitythrownexpbottle.setItem(itemstack);
             entitythrownexpbottle.a(entityhuman, entityhuman.pitch, entityhuman.yaw, -20.0F, 0.7F, 1.0F);
-            world.addEntity(entitythrownexpbottle);
+            // Paper start
+            com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent event = new com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack), (org.bukkit.entity.Projectile) entitythrownexpbottle.getBukkitEntity());
+            if (event.callEvent() && world.addEntity(entitythrownexpbottle)) {
+                if (event.shouldConsume() && !entityhuman.abilities.canInstantlyBuild) {
+                    itemstack.subtract(1);
+                } else if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+
+                world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_EXPERIENCE_BOTTLE_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (Entity.SHARED_RANDOM.nextFloat() * 0.4F + 0.8F));
+            } else {
+                if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+                return new InteractionResultWrapper(EnumInteractionResult.FAIL, itemstack);
+            }
+            // Paper end
         }
 
         entityhuman.b(StatisticList.ITEM_USED.b(this));
diff --git a/src/main/java/net/minecraft/server/ItemLingeringPotion.java b/src/main/java/net/minecraft/server/ItemLingeringPotion.java
index e3683bdae..f3ad1cd6d 100644
--- a/src/main/java/net/minecraft/server/ItemLingeringPotion.java
+++ b/src/main/java/net/minecraft/server/ItemLingeringPotion.java
@@ -9,15 +9,40 @@ public class ItemLingeringPotion extends ItemPotion {
     @Override
     public InteractionResultWrapper<ItemStack> a(World world, EntityHuman entityhuman, EnumHand enumhand) {
         ItemStack itemstack = entityhuman.b(enumhand);
+        /* // Paper start
         ItemStack itemstack1 = entityhuman.abilities.canInstantlyBuild ? itemstack.cloneItemStack() : itemstack.cloneAndSubtract(1);
 
         world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_LINGERING_POTION_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (ItemLingeringPotion.i.nextFloat() * 0.4F + 0.8F));
+        */ // Paper end
         if (!world.isClientSide) {
+
+            // Paper start - ensure stack count matches vanilla behavior without modifying original stack yet
+            ItemStack itemstack1 = itemstack.cloneItemStack();
+            if (!entityhuman.abilities.canInstantlyBuild) {
+                itemstack1.setCount(1);
+            }
+            // Paper end
             EntityPotion entitypotion = new EntityPotion(world, entityhuman);
 
             entitypotion.setItem(itemstack1);
             entitypotion.a(entityhuman, entityhuman.pitch, entityhuman.yaw, -20.0F, 0.5F, 1.0F);
-            world.addEntity(entitypotion);
+            // Paper start
+            com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent event = new com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack), (org.bukkit.entity.Projectile) entitypotion.getBukkitEntity());
+            if (event.callEvent() && world.addEntity(entitypotion)) {
+                if (event.shouldConsume() && !entityhuman.abilities.canInstantlyBuild) {
+                    itemstack.subtract(1);
+                } else if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+
+                world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_LINGERING_POTION_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (Entity.SHARED_RANDOM.nextFloat() * 0.4F + 0.8F));
+            } else {
+                if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+                return new InteractionResultWrapper(EnumInteractionResult.FAIL, itemstack);
+            }
+            // Paper end
         }
 
         entityhuman.b(StatisticList.ITEM_USED.b(this));
diff --git a/src/main/java/net/minecraft/server/ItemSnowball.java b/src/main/java/net/minecraft/server/ItemSnowball.java
index 624989dd7..c119785b7 100644
--- a/src/main/java/net/minecraft/server/ItemSnowball.java
+++ b/src/main/java/net/minecraft/server/ItemSnowball.java
@@ -23,15 +23,23 @@ public class ItemSnowball extends Item {
 
             entitysnowball.setItem(itemstack);
             entitysnowball.a(entityhuman, entityhuman.pitch, entityhuman.yaw, 0.0F, 1.5F, 1.0F);
-            if (world.addEntity(entitysnowball)) {
-                if (!entityhuman.abilities.canInstantlyBuild) {
+            // Paper start
+            com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent event = new com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack), (org.bukkit.entity.Projectile) entitysnowball.getBukkitEntity());
+            if (event.callEvent() && world.addEntity(entitysnowball)) {
+                if (event.shouldConsume() && !entityhuman.abilities.canInstantlyBuild) {
                     itemstack.subtract(1);
+                } else if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
                 }
 
-                world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_SNOWBALL_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (ItemSnowball.i.nextFloat() * 0.4F + 0.8F));
-            } else if (entityhuman instanceof EntityPlayer) {
-                ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_SNOWBALL_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (Entity.SHARED_RANDOM.nextFloat() * 0.4F + 0.8F));
+            } else {
+                if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+                return new InteractionResultWrapper(EnumInteractionResult.FAIL, itemstack);
             }
+            // Paper end
         }
         // CraftBukkit end
 
diff --git a/src/main/java/net/minecraft/server/ItemSplashPotion.java b/src/main/java/net/minecraft/server/ItemSplashPotion.java
index e267e43fe..fa6d627db 100644
--- a/src/main/java/net/minecraft/server/ItemSplashPotion.java
+++ b/src/main/java/net/minecraft/server/ItemSplashPotion.java
@@ -9,15 +9,39 @@ public class ItemSplashPotion extends ItemPotion {
     @Override
     public InteractionResultWrapper<ItemStack> a(World world, EntityHuman entityhuman, EnumHand enumhand) {
         ItemStack itemstack = entityhuman.b(enumhand);
+        /* // Paper start
         ItemStack itemstack1 = entityhuman.abilities.canInstantlyBuild ? itemstack.cloneItemStack() : itemstack.cloneAndSubtract(1);
 
         world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_SPLASH_POTION_THROW, SoundCategory.PLAYERS, 0.5F, 0.4F / (ItemSplashPotion.i.nextFloat() * 0.4F + 0.8F));
+        */ // Paper end
         if (!world.isClientSide) {
             EntityPotion entitypotion = new EntityPotion(world, entityhuman);
+            // Paper start - ensure stack count matches vanilla behavior without modifying original stack yet
+            ItemStack itemstack1 = itemstack.cloneItemStack();
+            if (!entityhuman.abilities.canInstantlyBuild) {
+                itemstack1.setCount(1);
+            }
+            // Paper end
 
             entitypotion.setItem(itemstack1);
             entitypotion.a(entityhuman, entityhuman.pitch, entityhuman.yaw, -20.0F, 0.5F, 1.0F);
-            world.addEntity(entitypotion);
+            // Paper start
+            com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent event = new com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack), (org.bukkit.entity.Projectile) entitypotion.getBukkitEntity());
+            if (event.callEvent() && world.addEntity(entitypotion)) {
+                if (event.shouldConsume() && !entityhuman.abilities.canInstantlyBuild) {
+                    itemstack.subtract(1);
+                } else if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+
+                world.a((EntityHuman) null, entityhuman.locX, entityhuman.locY, entityhuman.locZ, SoundEffects.ENTITY_SPLASH_POTION_THROW, SoundCategory.PLAYERS, 0.5F, 0.4F / (Entity.SHARED_RANDOM.nextFloat() * 0.4F + 0.8F));
+            } else {
+                if (entityhuman instanceof EntityPlayer) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+                return new InteractionResultWrapper(EnumInteractionResult.FAIL, itemstack);
+            }
+            // Paper end
         }
 
         entityhuman.b(StatisticList.ITEM_USED.b(this));
-- 
2.22.0