SPIGOT-4889: Add PlayerTakeLecternBookEvent

nms-patches/ContainerLectern.patch

@@ -1,12 +1,14 @@
 --- a/net/minecraft/server/ContainerLectern.java
 +++ b/net/minecraft/server/ContainerLectern.java
-@@ -1,15 +1,38 @@
+@@ -1,15 +1,40 @@
  package net.minecraft.server;
  
 +// CraftBukkit start
++import org.bukkit.Bukkit;
 +import org.bukkit.craftbukkit.inventory.CraftInventoryLectern;
 +import org.bukkit.craftbukkit.inventory.CraftInventoryView;
 +import org.bukkit.entity.Player;
++import org.bukkit.event.player.PlayerTakeLecternBookEvent;
 +// CraftBukkit end
 +
  public class ContainerLectern extends Container {
@@ -42,7 +44,7 @@
          super(Containers.LECTERN, i);
          a(iinventory, 1);
          a(icontainerproperties, 1);
-@@ -23,6 +46,7 @@
+@@ -23,6 +48,7 @@
              }
          });
          this.a(icontainerproperties);
@@ -50,7 +52,21 @@
      }
  
      @Override
-@@ -70,6 +94,7 @@
+@@ -48,6 +74,13 @@
+                     return false;
+                 }
+ 
++                // CraftBukkit start - Event for taking the book
++                PlayerTakeLecternBookEvent event = new PlayerTakeLecternBookEvent(player, ((CraftInventoryLectern) getBukkitView().getTopInventory()).getHolder());
++                Bukkit.getServer().getPluginManager().callEvent(event);
++                if (event.isCancelled()) {
++                    return false;
++                }
++                // CraftBukkit end
+                 ItemStack itemstack = this.inventory.splitWithoutUpdate(0);
+ 
+                 this.inventory.update();
+@@ -70,6 +103,7 @@
  
      @Override
      public boolean canUse(EntityHuman entityhuman) {