Re-add and update ForgeItemRegistry.

And fix code that depended on it.
Reverts parts of e91859130c

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeAdapter.java

@@ -20,8 +20,9 @@
 package com.sk89q.worldedit.forge;
 
 import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.util.Direction;
 import com.sk89q.worldedit.world.World;
-
+import net.minecraft.util.EnumFacing;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Vec3d;
 
@@ -46,6 +47,19 @@ final class ForgeAdapter {
         return new Vec3d(vector.getBlockX(), vector.getBlockY(), vector.getBlockZ());
     }
 
+    public static EnumFacing adapt(Direction face) {
+        switch (face) {
+            case NORTH: return EnumFacing.NORTH;
+            case SOUTH: return EnumFacing.SOUTH;
+            case WEST: return EnumFacing.WEST;
+            case EAST: return EnumFacing.EAST;
+            case DOWN: return EnumFacing.DOWN;
+            case UP:
+            default:
+                return EnumFacing.UP;
+        }
+    }
+
     public static BlockPos toBlockPos(Vector vector) {
         return new BlockPos(vector.getBlockX(), vector.getBlockY(), vector.getBlockZ());
     }

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeItemRegistry.java

@@ -0,0 +1,49 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.sk89q.worldedit.forge;
+
+import com.sk89q.worldedit.blocks.BaseItem;
+import com.sk89q.worldedit.world.registry.ItemRegistry;
+import net.minecraft.item.Item;
+import net.minecraft.util.ResourceLocation;
+
+import javax.annotation.Nullable;
+
+public class ForgeItemRegistry implements ItemRegistry {
+    @Nullable
+    @Override
+    public BaseItem createFromId(String id) {
+        Item match = Item.REGISTRY.getObject(new ResourceLocation(id));
+        if (match != null) {
+            return new BaseItem(Item.REGISTRY.getIDForObject(match), (short) 0);
+        } else {
+            return null;
+        }
+    }
+
+    @Nullable
+    @Override
+    public BaseItem createFromId(int id) {
+        if (Item.REGISTRY.getObjectById(id) != null) {
+            return new BaseItem(id, (short) 0);
+        } else {
+            return null;
+        }
+    }
+}

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeWorld.java

@@ -20,47 +20,36 @@
 package com.sk89q.worldedit.forge;
 
 import com.sk89q.jnbt.CompoundTag;
-import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.MaxChangedBlocksException;
-import com.sk89q.worldedit.Vector;
-import com.sk89q.worldedit.Vector2D;
-import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.*;
 import com.sk89q.worldedit.blocks.BaseBlock;
+import com.sk89q.worldedit.blocks.BaseItem;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.blocks.LazyBlock;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.internal.Constants;
 import com.sk89q.worldedit.regions.Region;
+import com.sk89q.worldedit.util.Direction;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.util.TreeGenerator.TreeType;
 import com.sk89q.worldedit.world.AbstractWorld;
 import com.sk89q.worldedit.world.biome.BaseBiome;
 import com.sk89q.worldedit.world.registry.WorldData;
-
-import java.lang.ref.WeakReference;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-import javax.annotation.Nullable;
-import net.minecraft.block.Block;
-import net.minecraft.block.BlockLeaves;
-import net.minecraft.block.BlockOldLeaf;
-import net.minecraft.block.BlockOldLog;
-import net.minecraft.block.BlockPlanks;
+import net.minecraft.block.*;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.entity.EntityList;
 import net.minecraft.entity.item.EntityItem;
 import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.init.Blocks;
 import net.minecraft.inventory.IInventory;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.network.play.server.SPacketChunkData;
 import net.minecraft.server.management.PlayerChunkMap;
 import net.minecraft.server.management.PlayerChunkMapEntry;
 import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.EnumActionResult;
+import net.minecraft.util.EnumHand;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.ChunkPos;
 import net.minecraft.world.World;
@@ -70,19 +59,15 @@ import net.minecraft.world.chunk.Chunk;
 import net.minecraft.world.chunk.IChunkGenerator;
 import net.minecraft.world.chunk.IChunkProvider;
 import net.minecraft.world.gen.ChunkProviderServer;
-import net.minecraft.world.gen.feature.WorldGenBigMushroom;
-import net.minecraft.world.gen.feature.WorldGenBigTree;
-import net.minecraft.world.gen.feature.WorldGenBirchTree;
-import net.minecraft.world.gen.feature.WorldGenCanopyTree;
-import net.minecraft.world.gen.feature.WorldGenMegaJungle;
-import net.minecraft.world.gen.feature.WorldGenMegaPineTree;
-import net.minecraft.world.gen.feature.WorldGenSavannaTree;
-import net.minecraft.world.gen.feature.WorldGenShrub;
-import net.minecraft.world.gen.feature.WorldGenSwamp;
-import net.minecraft.world.gen.feature.WorldGenTaiga1;
-import net.minecraft.world.gen.feature.WorldGenTaiga2;
-import net.minecraft.world.gen.feature.WorldGenTrees;
-import net.minecraft.world.gen.feature.WorldGenerator;
+import net.minecraft.world.gen.feature.*;
+
+import javax.annotation.Nullable;
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
@@ -227,6 +212,16 @@ public class ForgeWorld extends AbstractWorld {
         return false;
     }
 
+    @Override
+    public boolean useItem(Vector position, BaseItem item, Direction face) {
+        Item nativeItem = Item.getItemById(item.getType());
+        ItemStack stack = new ItemStack(nativeItem, 1, item.getData());
+        World world = getWorld();
+        EnumActionResult used = stack.onItemUse(new WorldEditFakePlayer((WorldServer) world), world, ForgeAdapter.toBlockPos(position),
+                EnumHand.MAIN_HAND, ForgeAdapter.adapt(face), 0, 0, 0);
+        return used != EnumActionResult.FAIL;
+    }
+
     @Override
     public void dropItem(Vector position, BaseItemStack item) {
         checkNotNull(position);

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeWorldData.java

@@ -20,6 +20,7 @@
 package com.sk89q.worldedit.forge;
 
 import com.sk89q.worldedit.world.registry.BiomeRegistry;
+import com.sk89q.worldedit.world.registry.ItemRegistry;
 import com.sk89q.worldedit.world.registry.LegacyWorldData;
 
 /**
@@ -29,12 +30,18 @@ class ForgeWorldData extends LegacyWorldData {
 
     private static final ForgeWorldData INSTANCE = new ForgeWorldData();
     private final BiomeRegistry biomeRegistry = new ForgeBiomeRegistry();
+    private final ItemRegistry itemRegistry = new ForgeItemRegistry();
 
     @Override
     public BiomeRegistry getBiomeRegistry() {
         return biomeRegistry;
     }
 
+    @Override
+    public ItemRegistry getItemRegistry() {
+        return itemRegistry;
+    }
+
     /**
      * Get a static instance.
      *