PaperMC/nms-patches/EntitySheep.patch

--- a/net/minecraft/server/EntitySheep.java
+++ b/net/minecraft/server/EntitySheep.java
@@ -5,6 +5,12 @@
 import java.util.Random;
 import javax.annotation.Nullable;
 
+// CraftBukkit start
+import org.bukkit.event.entity.SheepRegrowWoolEvent;
+import org.bukkit.event.player.PlayerShearEntityEvent;
+import org.bukkit.inventory.InventoryView;
+// CraftBukkit end
+
 public class EntitySheep extends EntityAnimal {
 
     private static final DataWatcherObject<Byte> bx = DataWatcher.a(EntitySheep.class, DataWatcherRegistry.a);
@@ -12,6 +18,13 @@
         public boolean canUse(EntityHuman entityhuman) {
             return false;
         }
+
+        // CraftBukkit start
+        @Override
+        public InventoryView getBukkitView() {
+            return null; // TODO: O.O
+        }
+        // CraftBukkit end
     }, 2, 1);
     private static final Map<EnumColor, float[]> bz = Maps.newEnumMap(EnumColor.class);
     private int bB;
@@ -29,6 +42,7 @@
         this.setSize(0.9F, 1.3F);
         this.container.setItem(0, new ItemStack(Items.DYE));
         this.container.setItem(1, new ItemStack(Items.DYE));
+        this.container.resultInventory = new InventoryCraftResult(); // CraftBukkit - add result slot for event
     }
 
     protected void r() {
@@ -131,11 +145,22 @@
 
         if (itemstack.getItem() == Items.SHEARS && !this.isSheared() && !this.isBaby()) {
             if (!this.world.isClientSide) {
+                // CraftBukkit start
+                PlayerShearEntityEvent event = new PlayerShearEntityEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), this.getBukkitEntity());
+                this.world.getServer().getPluginManager().callEvent(event);
+
+                if (event.isCancelled()) {
+                    return false;
+                }
+                // CraftBukkit end
+
                 this.setSheared(true);
                 int i = 1 + this.random.nextInt(3);
 
                 for (int j = 0; j < i; ++j) {
+                    this.forceDrops = true; // CraftBukkit
                     EntityItem entityitem = this.a(new ItemStack(Item.getItemOf(Blocks.WOOL), 1, this.getColor().getColorIndex()), 1.0F);
+                    this.forceDrops = false; // CraftBukkit
 
                     entityitem.motY += (double) (this.random.nextFloat() * 0.05F);
                     entityitem.motX += (double) ((this.random.nextFloat() - this.random.nextFloat()) * 0.1F);
@@ -222,6 +247,12 @@
     }
 
     public void A() {
+        // CraftBukkit start
+        SheepRegrowWoolEvent event = new SheepRegrowWoolEvent((org.bukkit.entity.Sheep) this.getBukkitEntity());
+        this.world.getServer().getPluginManager().callEvent(event);
+
+        if (event.isCancelled()) return;
+        // CraftBukkit end
         this.setSheared(false);
         if (this.isBaby()) {
             this.setAge(60);