merge 1.16

README.md

@@ -17,7 +17,7 @@ FAWE is a fork of WorldEdit that has huge speed and memory improvements and cons
 ## Downloads
 ### 1.13+
 * [Download](https://intellectualsites.github.io/download/fawe.html)
-* [Jenkins](https://ci.athion.net/job/FastAsyncWorldEdit-1.15/)
+* [Jenkins](https://ci.athion.net/job/FastAsyncWorldEdit-1.16/)
 
 ### < 1.12.2
 * [Download](https://intellectualsites.github.io/download/fawe.html)
@@ -35,7 +35,7 @@ $ gradlew setupDecompWorkspace
 $ gradlew build
 ```
 
-The jar is located in `worldedit-bukkit/build/libs/FastAsyncWorldEdit-1.15-###.jar`
+The jar is located in `worldedit-bukkit/build/libs/FastAsyncWorldEdit-1.16-###.jar`
 
 ## Contributing
 Have an idea for an optimization, or a cool feature?

build.gradle.kts

@@ -15,7 +15,7 @@ logger.lifecycle("""
 *******************************************
 """)
 //TODO FIX THIS WHEN I FEEL LIKE IT
-var rootVersion = "1.15"
+var rootVersion = "1.16"
 var revision: String = ""
 var buildNumber = ""
 var date: String = ""

config/checkstyle/checkstyle.xml

@@ -68,6 +68,6 @@
   </module>
   <!-- Validate that command annotations are formatted correctly -->
   <module name="RegexpMultiline">
-    <property name="format" value="^( +)@(Arg|Switch|Command)\(.*?\n\1 {5,}"/>
+    <property name="format" value="^( +)@(Arg|Switch|Command)\(.*?\r?\n\1 {5,}"/>
   </module>
 </module>

worldedit-bukkit/build.gradle.kts

@@ -41,12 +41,13 @@ dependencies {
     "compile"("org.spigotmcv1_14_r1:spigotmcv1_14_r1:1_14_r1")
     "compile"("org.spigotmcv1_15_r1:spigotmcv1_15_r1:1_15_r1")
     "compile"("it.unimi.dsi:fastutil:8.2.1")
-    "api"("com.destroystokyo.paper:paper-api:1.15.2-R0.1-SNAPSHOT") {
+    "api"("com.destroystokyo.paper:paper-api:1.16.1-R0.1-SNAPSHOT") {
         exclude("junit", "junit")
         isTransitive = false
     }
     "compileOnly"("org.spigotmc:spigot:1.14.4-R0.1-SNAPSHOT")
     "compileOnly"("org.spigotmc:spigot:1.15.2-R0.1-SNAPSHOT")
+    "compileOnly"("org.spigotmc:spigot:1.16.1-R0.1-SNAPSHOT")
     "implementation"("io.papermc:paperlib:1.0.2")
     "compileOnly"("com.sk89q:dummypermscompat:1.10")
     "implementation"("org.apache.logging.log4j:log4j-slf4j-impl:2.8.1")

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/FaweBukkit.java

@@ -58,6 +58,7 @@ public class FaweBukkit implements IFawe, Listener {
     private boolean listeningImages;
     private BukkitImageListener imageListener;
     private CFIPacketListener packetListener;
+    private final boolean chunksStretched;
 
     public VaultUtil getVault() {
         return this.vault;
@@ -99,6 +100,8 @@ public class FaweBukkit implements IFawe, Listener {
             // The tick limiter
             new ChunkListener_9();
         });
+
+        chunksStretched = Integer.parseInt(Bukkit.getMinecraftVersion().split("\\.")[1]) >= 16;
     }
 
     @Override // Please don't delete this again, it's WIP
@@ -302,6 +305,11 @@ public class FaweBukkit implements IFawe, Listener {
         return null;
     }
 
+    @Override
+    public boolean isChunksStretched() {
+        return chunksStretched;
+    }
+
     private void setupPlotSquared() {
         Plugin plotSquared = this.plugin.getServer().getPluginManager().getPlugin("PlotSquared");
         if (plotSquared == null)

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_14/BukkitGetBlocks_1_14.java

@@ -56,7 +56,7 @@ import net.minecraft.server.v1_14_R1.Entity;
 import net.minecraft.server.v1_14_R1.EntityTypes;
 import net.minecraft.server.v1_14_R1.EnumSkyBlock;
 import net.minecraft.server.v1_14_R1.IBlockData;
-import net.minecraft.server.v1_14_R1.LightEngineThreaded;
+import net.minecraft.server.v1_14_R1.LightEngine;
 import net.minecraft.server.v1_14_R1.NBTTagCompound;
 import net.minecraft.server.v1_14_R1.NBTTagInt;
 import net.minecraft.server.v1_14_R1.NibbleArray;
@@ -69,8 +69,13 @@ import org.bukkit.craftbukkit.v1_14_R1.CraftWorld;
 import org.bukkit.craftbukkit.v1_14_R1.block.CraftBlock;
 import org.bukkit.event.entity.CreatureSpawnEvent;
 import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class BukkitGetBlocks_1_14 extends CharGetBlocks {
+
+    private static final Logger log = LoggerFactory.getLogger(BukkitGetBlocks_1_14.class);
+
     public ChunkSection[] sections;
     public Chunk nmsChunk;
     public WorldServer world;
@@ -129,7 +134,17 @@ public class BukkitGetBlocks_1_14 extends CharGetBlocks {
         int layer = y >> 4;
         if (skyLight[layer] == null) {
             //getDataLayerData
-            skyLight[layer] = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.SKY).a(SectionPosition.a(nmsChunk.getPos(), layer));
+            SectionPosition sectionPosition = SectionPosition.a(nmsChunk.getPos(), layer);
+            NibbleArray nibbleArray = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.SKY).a(sectionPosition);
+            // If the server hasn't generated the section's NibbleArray yet, it will be null
+            if (nibbleArray == null) {
+               byte[] a = new byte[2048];
+               // Safe enough to assume if it's not created, it's under the sky. Unlikely to be created before lighting is fixed anyway.
+               Arrays.fill(a, (byte) 15);
+               nibbleArray = new NibbleArray(a);
+               ((LightEngine) world.getChunkProvider().getLightEngine()).a(EnumSkyBlock.SKY, sectionPosition, nibbleArray);
+            }
+            skyLight[layer] = nibbleArray;
         }
         long l = BlockPosition.a(x, y, z);
         return skyLight[layer].a(SectionPosition.b(BlockPosition.b(l)), SectionPosition.b(BlockPosition.c(l)), SectionPosition.b(BlockPosition.d(l)));
@@ -140,7 +155,17 @@ public class BukkitGetBlocks_1_14 extends CharGetBlocks {
         int layer = y >> 4;
         if (blockLight[layer] == null) {
             //getDataLayerData
-            blockLight[layer] = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.BLOCK).a(SectionPosition.a(nmsChunk.getPos(), layer));
+            SectionPosition sectionPosition = SectionPosition.a(nmsChunk.getPos(), layer);
+            NibbleArray nibbleArray = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.BLOCK).a(sectionPosition);
+            // If the server hasn't generated the section's NibbleArray yet, it will be null
+            if (nibbleArray == null) {
+                byte[] a = new byte[2048];
+                // Safe enough to assume if it's not created, it's under the sky. Unlikely to be created before lighting is fixed anyway.
+                Arrays.fill(a, (byte) 15);
+                nibbleArray = new NibbleArray(a);
+                ((LightEngine) world.getChunkProvider().getLightEngine()).a(EnumSkyBlock.BLOCK, sectionPosition, nibbleArray);
+            }
+            blockLight[layer] = nibbleArray;
         }
         long l = BlockPosition.a(x, y, z);
         return blockLight[layer].a(SectionPosition.b(BlockPosition.b(l)), SectionPosition.b(BlockPosition.c(l)), SectionPosition.b(BlockPosition.d(l)));
@@ -299,7 +324,7 @@ public class BukkitGetBlocks_1_14 extends CharGetBlocks {
                         } else {
                             existingSection = sections[layer];
                             if (existingSection == null) {
-                                System.out.println("Skipping invalid null section. chunk:" + X + "," + Z + " layer: " + layer);
+                                log.error("Skipping invalid null section. chunk:" + X + "," + Z + " layer: " + layer);
                                 continue;
                             }
                         }
@@ -326,7 +351,7 @@ public class BukkitGetBlocks_1_14 extends CharGetBlocks {
                             }
                             newSection = BukkitAdapter_1_14.newChunkSection(layer, this::load, setArr, fastmode);
                             if (!BukkitAdapter_1_14.setSectionAtomic(sections, existingSection, newSection, layer)) {
-                                System.out.println("Failed to set chunk section:" + X + "," + Z + " layer: " + layer);
+                                log.error("Failed to set chunk section:" + X + "," + Z + " layer: " + layer);
                                 continue;
                             } else {
                                 updateGet(this, nmsChunk, sections, newSection, setArr, layer);
@@ -667,9 +692,13 @@ public class BukkitGetBlocks_1_14 extends CharGetBlocks {
             if (light[Y] == null) {
                 continue;
             }
-            NibbleArray nibble = world.getChunkProvider().getLightEngine().a(skyBlock).a(SectionPosition.a(nmsChunk.getPos(), Y));
+            SectionPosition sectionPosition = SectionPosition.a(nmsChunk.getPos(), Y);
+            NibbleArray nibble = world.getChunkProvider().getLightEngine().a(skyBlock).a(sectionPosition);
             if (nibble == null) {
-                continue;
+                byte[] a = new byte[2048];
+                Arrays.fill(a, skyBlock == EnumSkyBlock.SKY ? (byte) 15 : (byte) 0);
+                nibble = new NibbleArray(a);
+                ((LightEngine) world.getChunkProvider().getLightEngine()).a(skyBlock, sectionPosition, nibble);
             }
             synchronized (nibble) {
                 for (int i = 0; i < 4096; i++) {

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_14/FAWEWorldNativeAccess_1_14.java

@@ -0,0 +1,176 @@
+package com.boydti.fawe.bukkit.adapter.mc1_14;
+
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.bukkit.BukkitAdapter;
+import com.sk89q.worldedit.bukkit.adapter.impl.FAWE_Spigot_v1_14_R4;
+import com.sk89q.worldedit.internal.block.BlockStateIdAccess;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+import net.minecraft.server.v1_14_R1.Block;
+import net.minecraft.server.v1_14_R1.BlockPosition;
+import net.minecraft.server.v1_14_R1.Chunk;
+import net.minecraft.server.v1_14_R1.ChunkProviderServer;
+import net.minecraft.server.v1_14_R1.EnumDirection;
+import net.minecraft.server.v1_14_R1.IBlockData;
+import net.minecraft.server.v1_14_R1.NBTBase;
+import net.minecraft.server.v1_14_R1.NBTTagCompound;
+import net.minecraft.server.v1_14_R1.PlayerChunk;
+import net.minecraft.server.v1_14_R1.TileEntity;
+import net.minecraft.server.v1_14_R1.World;
+import org.bukkit.craftbukkit.v1_14_R1.CraftWorld;
+import org.bukkit.craftbukkit.v1_14_R1.block.data.CraftBlockData;
+import org.bukkit.event.block.BlockPhysicsEvent;
+
+import javax.annotation.Nullable;
+import java.lang.ref.WeakReference;
+import java.util.Objects;
+
+public class FAWEWorldNativeAccess_1_14 implements WorldNativeAccess<Chunk, IBlockData, BlockPosition> {
+    private static final int UPDATE = 1, NOTIFY = 2;
+
+    private final FAWE_Spigot_v1_14_R4 adapter;
+    private final WeakReference<World> world;
+    private SideEffectSet sideEffectSet;
+
+    public FAWEWorldNativeAccess_1_14(FAWE_Spigot_v1_14_R4 adapter, WeakReference<World> world) {
+        this.adapter = adapter;
+        this.world = world;
+    }
+
+    private World getWorld() {
+        return Objects.requireNonNull(world.get(), "The reference to the world was lost");
+    }
+
+    @Override
+    public void setCurrentSideEffectSet(SideEffectSet sideEffectSet) {
+        this.sideEffectSet = sideEffectSet;
+    }
+
+    @Override
+    public Chunk getChunk(int x, int z) {
+        return getWorld().getChunkAt(x, z);
+    }
+
+    @Override
+    public IBlockData toNative(com.sk89q.worldedit.world.block.BlockState state) {
+        int stateId = BlockStateIdAccess.getBlockStateId(state);
+        return BlockStateIdAccess.isValidInternalId(stateId)
+                ? Block.getByCombinedId(stateId)
+                : ((CraftBlockData) BukkitAdapter.adapt(state)).getState();
+    }
+
+    @Override
+    public IBlockData getBlockState(Chunk chunk, BlockPosition position) {
+        return chunk.getType(position);
+    }
+
+    @Nullable
+    @Override
+    public IBlockData setBlockState(Chunk chunk, BlockPosition position, IBlockData state) {
+        return chunk.setType(position, state, false);
+    }
+
+    @Override
+    public IBlockData getValidBlockForPosition(IBlockData block, BlockPosition position) {
+        return Block.b(block, getWorld(), position);
+    }
+
+    @Override
+    public BlockPosition getPosition(int x, int y, int z) {
+        return new BlockPosition(x, y, z);
+    }
+
+    @Override
+    public void updateLightingForBlock(BlockPosition position) {
+        getWorld().getChunkProvider().getLightEngine().a(position);
+    }
+
+    @Override
+    public boolean updateTileEntity(BlockPosition position, CompoundTag tag) {
+        // We will assume that the tile entity was created for us,
+        // though we do not do this on the other versions
+        TileEntity tileEntity = getWorld().getTileEntity(position);
+        if (tileEntity == null) {
+            return false;
+        }
+        NBTBase nativeTag = adapter.fromNative(tag);
+        tileEntity.load((NBTTagCompound) nativeTag);
+        return true;
+    }
+
+    @Override
+    public void notifyBlockUpdate(BlockPosition position, IBlockData oldState, IBlockData newState) {
+        getWorld().notify(position, oldState, newState, UPDATE | NOTIFY);
+    }
+
+    @Override
+    public boolean isChunkTicking(Chunk chunk) {
+        return chunk.getState().isAtLeast(PlayerChunk.State.TICKING);
+    }
+
+    @Override
+    public void markBlockChanged(BlockPosition position) {
+        ((ChunkProviderServer) getWorld().getChunkProvider()).flagDirty(position);
+    }
+
+    private static final EnumDirection[] NEIGHBOUR_ORDER = {
+            EnumDirection.WEST, EnumDirection.EAST,
+            EnumDirection.DOWN, EnumDirection.UP,
+            EnumDirection.NORTH, EnumDirection.SOUTH
+    };
+
+    @Override
+    public void notifyNeighbors(BlockPosition pos, IBlockData oldState, IBlockData newState) {
+        World world = getWorld();
+        if (sideEffectSet.shouldApply(SideEffect.EVENTS)) {
+            world.update(pos, oldState.getBlock());
+        } else {
+            // When we don't want events, manually run the physics without them.
+            // Un-nest neighbour updating
+            for (EnumDirection direction : NEIGHBOUR_ORDER) {
+                BlockPosition shifted = pos.shift(direction);
+                world.getType(shifted).doPhysics(world, shifted, oldState.getBlock(), pos, false);
+            }
+        }
+        if (newState.isComplexRedstone()) {
+            world.updateAdjacentComparators(pos, newState.getBlock());
+        }
+    }
+
+    @Override
+    public void updateNeighbors(BlockPosition pos, IBlockData oldState, IBlockData newState, int recursionLimit) {
+        World world = getWorld();
+        // a == updateNeighbors
+        // b == updateDiagonalNeighbors
+        oldState.b(world, pos, NOTIFY);
+        if (sideEffectSet.shouldApply(SideEffect.EVENTS)) {
+            CraftWorld craftWorld = world.getWorld();
+            if (craftWorld != null) {
+                BlockPhysicsEvent event = new BlockPhysicsEvent(
+                        craftWorld.getBlockAt(pos.getX(), pos.getY(), pos.getZ()),
+                        CraftBlockData.fromData(newState));
+                world.getServer().getPluginManager().callEvent(event);
+                if (event.isCancelled()) {
+                    return;
+                }
+            }
+        }
+        newState.a(world, pos, NOTIFY);
+        newState.b(world, pos, NOTIFY);
+    }
+
+    @Override
+    public void onBlockStateChange(BlockPosition pos, IBlockData oldState, IBlockData newState) {
+        getWorld().a(pos, oldState, newState);
+    }
+
+
+    @Override
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
+        return this.adapter.setBlock(this.getChunk(position.getBlockX() >> 4, position.getBlockZ() >> 4).bukkitChunk, position.getBlockX(), position.getBlockY(), position.getBlockZ(), block, sideEffectSet.shouldApply(SideEffect.LIGHTING));
+    }
+}

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_15_2/BukkitGetBlocks_1_15_2.java

@@ -40,6 +40,7 @@ import net.minecraft.server.v1_15_R1.Entity;
 import net.minecraft.server.v1_15_R1.EntityTypes;
 import net.minecraft.server.v1_15_R1.EnumSkyBlock;
 import net.minecraft.server.v1_15_R1.IBlockData;
+import net.minecraft.server.v1_15_R1.LightEngine;
 import net.minecraft.server.v1_15_R1.NBTTagCompound;
 import net.minecraft.server.v1_15_R1.NBTTagInt;
 import net.minecraft.server.v1_15_R1.NibbleArray;
@@ -140,7 +141,17 @@ public class BukkitGetBlocks_1_15_2 extends CharGetBlocks {
     public int getSkyLight(int x, int y, int z) {
         int layer = y >> 4;
         if (skyLight[layer] == null) {
-            skyLight[layer] = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.SKY).a(SectionPosition.a(nmsChunk.getPos(), layer));
+            SectionPosition sectionPosition = SectionPosition.a(nmsChunk.getPos(), layer);
+            NibbleArray nibbleArray = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.SKY).a(sectionPosition);
+            // If the server hasn't generated the section's NibbleArray yet, it will be null
+            if (nibbleArray == null) {
+               byte[] a = new byte[2048];
+               // Safe enough to assume if it's not created, it's under the sky. Unlikely to be created before lighting is fixed anyway.
+               Arrays.fill(a, (byte) 15);
+               nibbleArray = new NibbleArray(a);
+               ((LightEngine) world.getChunkProvider().getLightEngine()).a(EnumSkyBlock.SKY, sectionPosition, nibbleArray);
+            }
+            skyLight[layer] = nibbleArray;
         }
         long l = BlockPosition.a(x, y, z);
         return skyLight[layer].a(SectionPosition.b(BlockPosition.b(l)), SectionPosition.b(BlockPosition.c(l)), SectionPosition.b(BlockPosition.d(l)));
@@ -150,7 +161,17 @@ public class BukkitGetBlocks_1_15_2 extends CharGetBlocks {
     public int getEmmittedLight(int x, int y, int z) {
         int layer = y >> 4;
         if (blockLight[layer] == null) {
-            blockLight[layer] = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.BLOCK).a(SectionPosition.a(nmsChunk.getPos(), layer));
+            SectionPosition sectionPosition = SectionPosition.a(nmsChunk.getPos(), layer);
+            NibbleArray nibbleArray = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.BLOCK).a(sectionPosition);
+            // If the server hasn't generated the section's NibbleArray yet, it will be null
+            if (nibbleArray == null) {
+                byte[] a = new byte[2048];
+                // Safe enough to assume if it's not created, it's not got any emitted light. Unlikely to be created before lighting is fixed anyway.
+                Arrays.fill(a, (byte) 0);
+                nibbleArray = new NibbleArray(a);
+                ((LightEngine) world.getChunkProvider().getLightEngine()).a(EnumSkyBlock.BLOCK, sectionPosition, nibbleArray);
+            }
+            blockLight[layer] = nibbleArray;
         }
         long l = BlockPosition.a(x, y, z);
         return blockLight[layer].a(SectionPosition.b(BlockPosition.b(l)), SectionPosition.b(BlockPosition.c(l)), SectionPosition.b(BlockPosition.d(l)));
@@ -316,7 +337,7 @@ public class BukkitGetBlocks_1_15_2 extends CharGetBlocks {
                         } else {
                             existingSection = sections[layer];
                             if (existingSection == null) {
-                                System.out.println("Skipping invalid null section. chunk:" + X + "," + Z + " layer: " + layer);
+                                log.error("Skipping invalid null section. chunk:" + X + "," + Z + " layer: " + layer);
                                 continue;
                             }
                         }
@@ -343,7 +364,7 @@ public class BukkitGetBlocks_1_15_2 extends CharGetBlocks {
                             }
                             newSection = BukkitAdapter_1_15_2.newChunkSection(layer, this::load, setArr, fastmode);
                             if (!BukkitAdapter_1_15_2.setSectionAtomic(sections, existingSection, newSection, layer)) {
-                                System.out.println("Failed to set chunk section:" + X + "," + Z + " layer: " + layer);
+                                log.error("Failed to set chunk section:" + X + "," + Z + " layer: " + layer);
                                 continue;
                             } else {
                                 updateGet(this, nmsChunk, sections, newSection, setArr, layer);
@@ -689,9 +710,13 @@ public class BukkitGetBlocks_1_15_2 extends CharGetBlocks {
             if (light[Y] == null) {
                 continue;
             }
-            NibbleArray nibble = world.getChunkProvider().getLightEngine().a(skyBlock).a(SectionPosition.a(nmsChunk.getPos(), Y));
+            SectionPosition sectionPosition = SectionPosition.a(nmsChunk.getPos(), Y);
+            NibbleArray nibble = world.getChunkProvider().getLightEngine().a(skyBlock).a(sectionPosition);
             if (nibble == null) {
-                continue;
+                byte[] a = new byte[2048];
+                Arrays.fill(a, skyBlock == EnumSkyBlock.SKY ? (byte) 15 : (byte) 0);
+                nibble = new NibbleArray(a);
+                ((LightEngine) world.getChunkProvider().getLightEngine()).a(skyBlock, sectionPosition, nibble);
             }
             synchronized (nibble) {
                 for (int i = 0; i < 4096; i++) {

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_15_2/FAWEWorldNativeAccess_1_15_2.java

@@ -0,0 +1,173 @@
+package com.boydti.fawe.bukkit.adapter.mc1_15_2;
+
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.bukkit.BukkitAdapter;
+import com.sk89q.worldedit.bukkit.adapter.impl.FAWE_Spigot_v1_15_R2;
+import com.sk89q.worldedit.internal.block.BlockStateIdAccess;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+import net.minecraft.server.v1_15_R1.Block;
+import net.minecraft.server.v1_15_R1.BlockPosition;
+import net.minecraft.server.v1_15_R1.Chunk;
+import net.minecraft.server.v1_15_R1.ChunkProviderServer;
+import net.minecraft.server.v1_15_R1.EnumDirection;
+import net.minecraft.server.v1_15_R1.IBlockData;
+import net.minecraft.server.v1_15_R1.NBTBase;
+import net.minecraft.server.v1_15_R1.NBTTagCompound;
+import net.minecraft.server.v1_15_R1.PlayerChunk;
+import net.minecraft.server.v1_15_R1.TileEntity;
+import net.minecraft.server.v1_15_R1.World;
+import org.bukkit.craftbukkit.v1_15_R1.CraftWorld;
+import org.bukkit.craftbukkit.v1_15_R1.block.data.CraftBlockData;
+import org.bukkit.event.block.BlockPhysicsEvent;
+
+import javax.annotation.Nullable;
+import java.lang.ref.WeakReference;
+import java.util.Objects;
+
+public class FAWEWorldNativeAccess_1_15_2 implements WorldNativeAccess<Chunk, IBlockData, BlockPosition> {
+    private static final int UPDATE = 1, NOTIFY = 2;
+
+    private final FAWE_Spigot_v1_15_R2 adapter;
+    private final WeakReference<World> world;
+    private SideEffectSet sideEffectSet;
+
+    public FAWEWorldNativeAccess_1_15_2(FAWE_Spigot_v1_15_R2 adapter, WeakReference<World> world) {
+        this.adapter = adapter;
+        this.world = world;
+    }
+
+    private World getWorld() {
+        return Objects.requireNonNull(world.get(), "The reference to the world was lost");
+    }
+
+    @Override
+    public void setCurrentSideEffectSet(SideEffectSet sideEffectSet) {
+        this.sideEffectSet = sideEffectSet;
+    }
+
+    @Override
+    public Chunk getChunk(int x, int z) {
+        return getWorld().getChunkAt(x, z);
+    }
+
+    @Override
+    public IBlockData toNative(com.sk89q.worldedit.world.block.BlockState state) {
+        int stateId = BlockStateIdAccess.getBlockStateId(state);
+        return BlockStateIdAccess.isValidInternalId(stateId)
+                ? Block.getByCombinedId(stateId)
+                : ((CraftBlockData) BukkitAdapter.adapt(state)).getState();
+    }
+
+    @Override
+    public IBlockData getBlockState(Chunk chunk, BlockPosition position) {
+        return chunk.getType(position);
+    }
+
+    @Nullable
+    @Override
+    public IBlockData setBlockState(Chunk chunk, BlockPosition position, IBlockData state) {
+        return chunk.setType(position, state, false);
+    }
+
+    @Override
+    public IBlockData getValidBlockForPosition(IBlockData block, BlockPosition position) {
+        return Block.b(block, getWorld(), position);
+    }
+
+    @Override
+    public BlockPosition getPosition(int x, int y, int z) {
+        return new BlockPosition(x, y, z);
+    }
+
+    @Override
+    public void updateLightingForBlock(BlockPosition position) {
+        getWorld().getChunkProvider().getLightEngine().a(position);
+    }
+
+    @Override
+    public boolean updateTileEntity(BlockPosition position, CompoundTag tag) {
+        // We will assume that the tile entity was created for us,
+        // though we do not do this on the other versions
+        TileEntity tileEntity = getWorld().getTileEntity(position);
+        if (tileEntity == null) {
+            return false;
+        }
+        NBTBase nativeTag = adapter.fromNative(tag);
+        tileEntity.load((NBTTagCompound) nativeTag);
+        return true;
+    }
+
+    @Override
+    public void notifyBlockUpdate(BlockPosition position, IBlockData oldState, IBlockData newState) {
+        getWorld().notify(position, oldState, newState, UPDATE | NOTIFY);
+    }
+
+    @Override
+    public boolean isChunkTicking(Chunk chunk) {
+        return chunk.getState().isAtLeast(PlayerChunk.State.TICKING);
+    }
+
+    @Override
+    public void markBlockChanged(BlockPosition position) {
+        ((ChunkProviderServer) getWorld().getChunkProvider()).flagDirty(position);
+    }
+
+    private static final EnumDirection[] NEIGHBOUR_ORDER = {
+            EnumDirection.WEST, EnumDirection.EAST,
+            EnumDirection.DOWN, EnumDirection.UP,
+            EnumDirection.NORTH, EnumDirection.SOUTH
+    };
+
+    @Override
+    public void notifyNeighbors(BlockPosition pos, IBlockData oldState, IBlockData newState) {
+        World world = getWorld();
+        if (sideEffectSet.shouldApply(SideEffect.EVENTS)) {
+            world.update(pos, oldState.getBlock());
+        } else {
+            // When we don't want events, manually run the physics without them.
+            // Un-nest neighbour updating
+            for (EnumDirection direction : NEIGHBOUR_ORDER) {
+                BlockPosition shifted = pos.shift(direction);
+                world.getType(shifted).doPhysics(world, shifted, oldState.getBlock(), pos, false);
+            }
+        }
+        if (newState.isComplexRedstone()) {
+            world.updateAdjacentComparators(pos, newState.getBlock());
+        }
+    }
+
+    @Override
+    public void updateNeighbors(BlockPosition pos, IBlockData oldState, IBlockData newState, int recursionLimit) {
+        World world = getWorld();
+        // a == updateNeighbors
+        // b == updateDiagonalNeighbors
+        oldState.b(world, pos, NOTIFY);
+        if (sideEffectSet.shouldApply(SideEffect.EVENTS)) {
+            CraftWorld craftWorld = world.getWorld();
+            if (craftWorld != null) {
+                BlockPhysicsEvent event = new BlockPhysicsEvent(craftWorld.getBlockAt(pos.getX(), pos.getY(), pos.getZ()), CraftBlockData.fromData(newState));
+                world.getServer().getPluginManager().callEvent(event);
+                if (event.isCancelled()) {
+                    return;
+                }
+            }
+        }
+        newState.a(world, pos, NOTIFY);
+        newState.b(world, pos, NOTIFY);
+    }
+
+    @Override
+    public void onBlockStateChange(BlockPosition pos, IBlockData oldState, IBlockData newState) {
+        getWorld().a(pos, oldState, newState);
+    }
+
+    @Override
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
+        return this.adapter.setBlock(this.getChunk(position.getBlockX() >> 4, position.getBlockZ() >> 4).bukkitChunk, position.getBlockX(), position.getBlockY(), position.getBlockZ(), block, sideEffectSet.shouldApply(SideEffect.LIGHTING));
+    }
+}

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_16_1/BlockMaterial_1_16_1.java

@@ -1,15 +1,11 @@
-package com.boydti.fawe.bukkit.adapter.mc1_15;
+package com.boydti.fawe.bukkit.adapter.mc1_16_1;
 
 import com.sk89q.util.ReflectionUtil;
 import com.sk89q.worldedit.world.registry.BlockMaterial;
-import net.minecraft.server.v1_15_R1.Block;
-import net.minecraft.server.v1_15_R1.EnumPistonReaction;
-import net.minecraft.server.v1_15_R1.IBlockData;
-import net.minecraft.server.v1_15_R1.ITileEntity;
-import net.minecraft.server.v1_15_R1.Material;
-import org.bukkit.craftbukkit.v1_15_R1.block.data.CraftBlockData;
+import net.minecraft.server.v1_16_R1.*;
+import org.bukkit.craftbukkit.v1_16_R1.block.data.CraftBlockData;
 
-public class BlockMaterial_1_15 implements BlockMaterial {
+public class BlockMaterial_1_16_1 implements BlockMaterial {
     private final Block block;
     private final IBlockData defaultState;
     private final Material material;
@@ -17,17 +13,17 @@ public class BlockMaterial_1_15 implements BlockMaterial {
     private final CraftBlockData craftBlockData;
     private final org.bukkit.Material craftMaterial;
 
-    public BlockMaterial_1_15(Block block) {
+    public BlockMaterial_1_16_1(Block block) {
         this(block, block.getBlockData());
     }
 
-    public BlockMaterial_1_15(Block block, IBlockData defaultState) {
+    public BlockMaterial_1_16_1(Block block, IBlockData defaultState) {
         this.block = block;
         this.defaultState = defaultState;
         this.material = defaultState.getMaterial();
         this.craftBlockData = CraftBlockData.fromData(defaultState);
         this.craftMaterial = craftBlockData.getMaterial();
-        this.isTranslucent = !(boolean) ReflectionUtil.getField(Block.class, block, "v");
+        this.isTranslucent = !(boolean) ReflectionUtil.getField(Block.class, block, "at"); //TODO Update Mapping for 1.16.1
     }
 
     public Block getBlock() {
@@ -78,7 +74,7 @@ public class BlockMaterial_1_15 implements BlockMaterial {
 
     @Override
     public float getHardness() {
-        return block.strength;
+        return craftBlockData.getState().strength;
     }
 
     @Override
@@ -88,12 +84,12 @@ public class BlockMaterial_1_15 implements BlockMaterial {
 
     @Override
     public float getSlipperiness() {
-        return block.m();
+        return block.getFrictionFactor();
     }
 
     @Override
     public int getLightValue() {
-        return defaultState.h();
+        return defaultState.f();
     }
 
     @Override
@@ -128,7 +124,8 @@ public class BlockMaterial_1_15 implements BlockMaterial {
 
     @Override
     public boolean isToolRequired() {
-        return !material.isAlwaysDestroyable();
+        //TODO Removed in 1.16.1 Replacement not found.
+        return true;
     }
 
     @Override
@@ -148,6 +145,6 @@ public class BlockMaterial_1_15 implements BlockMaterial {
 
     @Override
     public int getMapColor() {
-        return material.i().rgb;
+        return material.h().rgb;
     }
 }

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_16_1/BukkitAdapter_1_16_1.java

@@ -1,11 +1,11 @@
-package com.boydti.fawe.bukkit.adapter.mc1_15;
+package com.boydti.fawe.bukkit.adapter.mc1_16_1;
 
 import com.boydti.fawe.Fawe;
 import com.boydti.fawe.FaweCache;
 import com.boydti.fawe.bukkit.adapter.DelegateLock;
 import com.boydti.fawe.bukkit.adapter.NMSAdapter;
 import com.boydti.fawe.config.Settings;
-import com.boydti.fawe.object.collection.BitArray;
+import com.boydti.fawe.object.collection.BitArrayUnstretched;
 import com.boydti.fawe.util.MathMan;
 import com.boydti.fawe.util.ReflectionUtils;
 import com.boydti.fawe.util.TaskManager;
@@ -14,22 +14,9 @@ import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockTypesCache;
 import io.papermc.lib.PaperLib;
 import net.jpountz.util.UnsafeUtils;
-import net.minecraft.server.v1_15_R1.Block;
-import net.minecraft.server.v1_15_R1.Chunk;
-import net.minecraft.server.v1_15_R1.ChunkCoordIntPair;
-import net.minecraft.server.v1_15_R1.ChunkSection;
-import net.minecraft.server.v1_15_R1.DataBits;
-import net.minecraft.server.v1_15_R1.DataPalette;
-import net.minecraft.server.v1_15_R1.DataPaletteBlock;
-import net.minecraft.server.v1_15_R1.DataPaletteLinear;
-import net.minecraft.server.v1_15_R1.GameProfileSerializer;
-import net.minecraft.server.v1_15_R1.IBlockData;
-import net.minecraft.server.v1_15_R1.PacketPlayOutLightUpdate;
-import net.minecraft.server.v1_15_R1.PlayerChunk;
-import net.minecraft.server.v1_15_R1.PlayerChunkMap;
-import net.minecraft.server.v1_15_R1.World;
-import org.bukkit.craftbukkit.v1_15_R1.CraftChunk;
-import org.bukkit.craftbukkit.v1_15_R1.CraftWorld;
+import net.minecraft.server.v1_16_R1.*;
+import org.bukkit.craftbukkit.v1_16_R1.CraftChunk;
+import org.bukkit.craftbukkit.v1_16_R1.CraftWorld;
 import sun.misc.Unsafe;
 
 import java.lang.invoke.MethodHandle;
@@ -43,7 +30,7 @@ import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Function;
 
-public final class BukkitAdapter_1_15 extends NMSAdapter {
+public final class BukkitAdapter_1_16_1 extends NMSAdapter {
     /*
     NMS fields
     */
@@ -51,6 +38,8 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
     public final static Field fieldPalette;
     public final static Field fieldSize;
 
+    public final static Field fieldBitsPerEntry;
+
     public final static Field fieldFluidCount;
     public final static Field fieldTickingBlockCount;
     public final static Field fieldNonEmptyBlockCount;
@@ -74,6 +63,9 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
             fieldPalette = DataPaletteBlock.class.getDeclaredField("h");
             fieldPalette.setAccessible(true);
 
+            fieldBitsPerEntry = DataBits.class.getDeclaredField("c");
+            fieldBitsPerEntry.setAccessible(true);
+
             fieldFluidCount = ChunkSection.class.getDeclaredField("e");
             fieldFluidCount.setAccessible(true);
             fieldTickingBlockCount = ChunkSection.class.getDeclaredField("tickingBlockCount");
@@ -86,8 +78,6 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
             fieldDirtyBits = PlayerChunk.class.getDeclaredField("r");
             fieldDirtyBits.setAccessible(true);
 
-            fieldTickingBlockCount.setAccessible(true);
-
             Method declaredGetVisibleChunk = PlayerChunkMap.class.getDeclaredMethod("getVisibleChunk", long.class);
             declaredGetVisibleChunk.setAccessible(true);
             methodGetVisibleChunk = MethodHandles.lookup().unreflect(declaredGetVisibleChunk);
@@ -120,6 +110,7 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
     }
 
     protected static DelegateLock applyLock(ChunkSection section) {
+        //todo there has to be a better way to do this. Maybe using a() in DataPaletteBlock which acquires the lock in NMS?
         try {
             synchronized (section) {
                 DataPaletteBlock<IBlockData> blocks = section.getBlocks();
@@ -138,7 +129,7 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
     }
 
     public static Chunk ensureLoaded(World nmsWorld, int X, int Z) {
-        Chunk nmsChunk = nmsWorld.getChunkIfLoaded(X, Z);
+        Chunk nmsChunk = nmsWorld.getChunkProvider().getChunkAt(X, Z, false);
         if (nmsChunk != null) {
             return nmsChunk;
         }
@@ -159,7 +150,7 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
         return TaskManager.IMP.sync(() -> nmsWorld.getChunkAt(X, Z));
     }
 
-    public static PlayerChunk getPlayerChunk(net.minecraft.server.v1_15_R1.WorldServer nmsWorld, final int cx, final int cz) {
+    public static PlayerChunk getPlayerChunk(WorldServer nmsWorld, final int cx, final int cz) {
         PlayerChunkMap chunkMap = nmsWorld.getChunkProvider().playerChunkMap;
         try {
             return (PlayerChunk)methodGetVisibleChunk.invoke(chunkMap, ChunkCoordIntPair.pair(cx, cz));
@@ -168,7 +159,7 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
         }
     }
 
-    public static void sendChunk(net.minecraft.server.v1_15_R1.WorldServer nmsWorld, int X, int Z, int mask, boolean lighting) {
+    public static void sendChunk(WorldServer nmsWorld, int X, int Z, int mask, boolean lighting) {
         PlayerChunk playerChunk = getPlayerChunk(nmsWorld, X, Z);
         if (playerChunk == null) {
             return;
@@ -191,7 +182,8 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
 
                     if (lighting) {
                         ChunkCoordIntPair chunkCoordIntPair = new ChunkCoordIntPair(X, Z);
-                        PacketPlayOutLightUpdate packet = new PacketPlayOutLightUpdate(chunkCoordIntPair, nmsWorld.getChunkProvider().getLightEngine());
+                        boolean trustEdges = false; //Added in 1.16.1 Not sure what it does.
+                        PacketPlayOutLightUpdate packet = new PacketPlayOutLightUpdate(chunkCoordIntPair, nmsWorld.getChunkProvider().getLightEngine(), trustEdges);
                         playerChunk.players.a(chunkCoordIntPair, false).forEach(p -> {
                             p.playerConnection.sendPacket(packet);
                         });
@@ -202,9 +194,7 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
                 }
                 return null;
             });
-            return;
         }
-        return;
     }
 
     /*
@@ -227,9 +217,11 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
             Map<BlockVector3, Integer> ticking_blocks = new HashMap<>();
             int air;
             if (get == null) {
-                air = createPalette(blockToPalette, paletteToBlock, blocksCopy, num_palette_buffer, set, ticking_blocks, fastmode);
+                air = createPalette(blockToPalette, paletteToBlock, blocksCopy, num_palette_buffer,
+                    set, ticking_blocks, fastmode);
             } else {
-                air = createPalette(layer, blockToPalette, paletteToBlock, blocksCopy, num_palette_buffer, get, set, ticking_blocks, fastmode);
+                air = createPalette(layer, blockToPalette, paletteToBlock, blocksCopy,
+                    num_palette_buffer, get, set, ticking_blocks, fastmode);
             }
             int num_palette = num_palette_buffer[0];
             // BlockStates
@@ -240,11 +232,13 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
                 bitsPerEntry = Math.max(bitsPerEntry, 1); // For some reason minecraft needs 4096 bits to store 0 entries
             }
 
-            final int blockBitArrayEnd = (bitsPerEntry * 4096) >> 6;
+            final int blocksPerLong = MathMan.floorZero((double) 64 / bitsPerEntry);
+            final int blockBitArrayEnd = MathMan.ceilZero((float) 4096 / blocksPerLong);
+
             if (num_palette == 1) {
                 for (int i = 0; i < blockBitArrayEnd; i++) blockStates[i] = 0;
             } else {
-                final BitArray bitArray = new BitArray(bitsPerEntry, 4096, blockStates);
+                final BitArrayUnstretched bitArray = new BitArrayUnstretched(bitsPerEntry, blockStates);
                 bitArray.fromRaw(blocksCopy);
             }
 
@@ -257,14 +251,14 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
             final DataBits nmsBits = new DataBits(bitsPerEntry, 4096, bits);
             final DataPalette<IBlockData> palette;
 //                palette = new DataPaletteHash<>(Block.REGISTRY_ID, bitsPerEntry, dataPaletteBlocks, GameProfileSerializer::d, GameProfileSerializer::a);
-            palette = new DataPaletteLinear<>(Block.REGISTRY_ID, bitsPerEntry, dataPaletteBlocks, GameProfileSerializer::d);
+            palette = new DataPaletteLinear<>(Block.REGISTRY_ID, bitsPerEntry, dataPaletteBlocks, GameProfileSerializer::c);
 
             // set palette
             for (int i = 0; i < num_palette; i++) {
                 final int ordinal = paletteToBlock[i];
                 blockToPalette[ordinal] = Integer.MAX_VALUE;
                 final BlockState state = BlockTypesCache.states[ordinal];
-                final IBlockData ibd = ((BlockMaterial_1_15) state.getMaterial()).getState();
+                final IBlockData ibd = ((BlockMaterial_1_16_1) state.getMaterial()).getState();
                 palette.a(ibd);
             }
             try {
@@ -272,10 +266,11 @@ public final class BukkitAdapter_1_15 extends NMSAdapter {
                 fieldPalette.set(dataPaletteBlocks, palette);
                 fieldSize.set(dataPaletteBlocks, bitsPerEntry);
                 setCount(ticking_blocks.size(), 4096 - air, section);
-                ticking_blocks.forEach((pos, ordinal) -> {
-                    section.setType(pos.getBlockX(), pos.getBlockY(), pos.getBlockZ(),
-                        Block.getByCombinedId(ordinal));
-                });
+                if (!fastmode) {
+                    ticking_blocks.forEach((pos, ordinal) -> section
+                        .setType(pos.getBlockX(), pos.getBlockY(), pos.getBlockZ(),
+                            Block.getByCombinedId(ordinal)));
+                }
             } catch (final IllegalAccessException | NoSuchFieldException e) {
                 throw new RuntimeException(e);
             }

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_16_1/BukkitGetBlocks_1_16_1.java

@@ -1,6 +1,4 @@
-package com.boydti.fawe.bukkit.adapter.mc1_15;
-
-import static org.slf4j.LoggerFactory.getLogger;
+package com.boydti.fawe.bukkit.adapter.mc1_16_1;
 
 import com.boydti.fawe.Fawe;
 import com.boydti.fawe.FaweCache;
@@ -9,71 +7,46 @@ import com.boydti.fawe.beta.implementation.blocks.CharBlocks;
 import com.boydti.fawe.beta.implementation.blocks.CharGetBlocks;
 import com.boydti.fawe.beta.implementation.queue.QueueHandler;
 import com.boydti.fawe.bukkit.adapter.DelegateLock;
-import com.boydti.fawe.bukkit.adapter.mc1_15.nbt.LazyCompoundTag_1_15;
+import com.boydti.fawe.bukkit.adapter.mc1_16_1.nbt.LazyCompoundTag_1_16_1;
 import com.boydti.fawe.config.Settings;
 import com.boydti.fawe.object.collection.AdaptedMap;
-import com.boydti.fawe.object.collection.BitArray;
+import com.boydti.fawe.object.collection.BitArrayUnstretched;
 import com.google.common.base.Suppliers;
 import com.google.common.collect.Iterables;
-import com.sk89q.jnbt.CompoundTag;
-import com.sk89q.jnbt.ListTag;
-import com.sk89q.jnbt.LongTag;
-import com.sk89q.jnbt.StringTag;
 import com.sk89q.jnbt.Tag;
+import com.sk89q.jnbt.*;
 import com.sk89q.worldedit.bukkit.BukkitAdapter;
 import com.sk89q.worldedit.bukkit.WorldEditPlugin;
 import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
-import com.sk89q.worldedit.bukkit.adapter.impl.FAWE_Spigot_v1_15_R1;
+import com.sk89q.worldedit.bukkit.adapter.impl.FAWE_Spigot_v1_16_R1;
 import com.sk89q.worldedit.internal.Constants;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BlockTypes;
-import java.util.AbstractSet;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.HashMap;
-import java.util.Set;
-import java.util.UUID;
+import net.minecraft.server.v1_16_R1.*;
+import org.bukkit.World;
+import org.bukkit.block.Biome;
+import org.bukkit.craftbukkit.v1_16_R1.CraftWorld;
+import org.bukkit.craftbukkit.v1_16_R1.block.CraftBlock;
+import org.bukkit.event.entity.CreatureSpawnEvent;
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.annotation.Nullable;
+import java.util.*;
 import java.util.concurrent.Callable;
 import java.util.concurrent.Future;
 import java.util.function.Function;
-import java.util.stream.Collectors;
-import java.util.stream.StreamSupport;
-import net.minecraft.server.v1_15_R1.BiomeBase;
-import net.minecraft.server.v1_15_R1.BiomeStorage;
-import net.minecraft.server.v1_15_R1.BlockPosition;
-import net.minecraft.server.v1_15_R1.Chunk;
-import net.minecraft.server.v1_15_R1.ChunkSection;
-import net.minecraft.server.v1_15_R1.DataBits;
-import net.minecraft.server.v1_15_R1.DataPalette;
-import net.minecraft.server.v1_15_R1.DataPaletteBlock;
-import net.minecraft.server.v1_15_R1.DataPaletteHash;
-import net.minecraft.server.v1_15_R1.DataPaletteLinear;
-import net.minecraft.server.v1_15_R1.Entity;
-import net.minecraft.server.v1_15_R1.EntityTypes;
-import net.minecraft.server.v1_15_R1.EnumSkyBlock;
-import net.minecraft.server.v1_15_R1.IBlockData;
-import net.minecraft.server.v1_15_R1.LightEngineThreaded;
-import net.minecraft.server.v1_15_R1.NBTTagCompound;
-import net.minecraft.server.v1_15_R1.NBTTagInt;
-import net.minecraft.server.v1_15_R1.NibbleArray;
-import net.minecraft.server.v1_15_R1.SectionPosition;
-import net.minecraft.server.v1_15_R1.TileEntity;
-import net.minecraft.server.v1_15_R1.WorldServer;
-import org.bukkit.World;
-import org.bukkit.block.Biome;
-import org.bukkit.craftbukkit.v1_15_R1.CraftWorld;
-import org.bukkit.craftbukkit.v1_15_R1.block.CraftBlock;
-import org.bukkit.event.entity.CreatureSpawnEvent;
-import org.jetbrains.annotations.NotNull;
 
-public class BukkitGetBlocks_1_15 extends CharGetBlocks {
+import static org.slf4j.LoggerFactory.getLogger;
+
+public class BukkitGetBlocks_1_16_1 extends CharGetBlocks {
+
+    private static final Logger log = LoggerFactory.getLogger(BukkitGetBlocks_1_16_1.class);
+
     private static final Function<BlockPosition, BlockVector3> posNms2We = v -> BlockVector3.at(v.getX(), v.getY(), v.getZ());
-    private final static Function<TileEntity, CompoundTag> nmsTile2We = tileEntity -> new LazyCompoundTag_1_15(Suppliers.memoize(() -> tileEntity.save(new NBTTagCompound())));
+    private final static Function<TileEntity, CompoundTag> nmsTile2We = tileEntity -> new LazyCompoundTag_1_16_1(Suppliers.memoize(() -> tileEntity.save(new NBTTagCompound())));
     public ChunkSection[] sections;
     public Chunk nmsChunk;
     public WorldServer world;
@@ -81,11 +54,11 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
     public NibbleArray[] blockLight = new NibbleArray[16];
     public NibbleArray[] skyLight = new NibbleArray[16];
 
-    public BukkitGetBlocks_1_15(World world, int X, int Z) {
+    public BukkitGetBlocks_1_16_1(World world, int X, int Z) {
         this(((CraftWorld) world).getHandle(), X, Z);
     }
 
-    public BukkitGetBlocks_1_15(WorldServer world, int X, int Z) {
+    public BukkitGetBlocks_1_16_1(WorldServer world, int X, int Z) {
         this.world = world;
         this.X = X;
         this.Z = Z;
@@ -120,7 +93,7 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
         if (tileEntity == null) {
             return null;
         }
-        return new LazyCompoundTag_1_15(Suppliers.memoize(() -> tileEntity.save(new NBTTagCompound())));
+        return new LazyCompoundTag_1_16_1(Suppliers.memoize(() -> tileEntity.save(new NBTTagCompound())));
     }
 
     @Override
@@ -136,7 +109,17 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
     public int getSkyLight(int x, int y, int z) {
         int layer = y >> 4;
         if (skyLight[layer] == null) {
-            skyLight[layer] = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.SKY).a(SectionPosition.a(nmsChunk.getPos(), layer));
+            SectionPosition sectionPosition = SectionPosition.a(nmsChunk.getPos(), layer);
+            NibbleArray nibbleArray = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.SKY).a(sectionPosition);
+            // If the server hasn't generated the section's NibbleArray yet, it will be null
+            if (nibbleArray == null) {
+               byte[] a = new byte[2048];
+               // Safe enough to assume if it's not created, it's under the sky. Unlikely to be created before lighting is fixed anyway.
+               Arrays.fill(a, (byte) 15);
+               nibbleArray = new NibbleArray(a);
+               ((LightEngine) world.getChunkProvider().getLightEngine()).a(EnumSkyBlock.SKY, sectionPosition, nibbleArray, true);
+            }
+            skyLight[layer] = nibbleArray;
         }
         long l = BlockPosition.a(x, y, z);
         return skyLight[layer].a(SectionPosition.b(BlockPosition.b(l)), SectionPosition.b(BlockPosition.c(l)), SectionPosition.b(BlockPosition.d(l)));
@@ -145,8 +128,18 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
     @Override
     public int getEmmittedLight(int x, int y, int z) {
         int layer = y >> 4;
-        if (blockLight[layer] == null) {
-            blockLight[layer] = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.BLOCK).a(SectionPosition.a(nmsChunk.getPos(), layer));
+        if (skyLight[layer] == null) {
+            SectionPosition sectionPosition = SectionPosition.a(nmsChunk.getPos(), layer);
+            NibbleArray nibbleArray = world.getChunkProvider().getLightEngine().a(EnumSkyBlock.BLOCK).a(sectionPosition);
+            // If the server hasn't generated the section's NibbleArray yet, it will be null
+            if (nibbleArray == null) {
+               byte[] a = new byte[2048];
+               // Safe enough to assume if it's not created, it's under the sky. Unlikely to be created before lighting is fixed anyway.
+               Arrays.fill(a, (byte) 15);
+               nibbleArray = new NibbleArray(a);
+               ((LightEngine) world.getChunkProvider().getLightEngine()).a(EnumSkyBlock.BLOCK, sectionPosition, nibbleArray, true);
+            }
+            skyLight[layer] = nibbleArray;
         }
         long l = BlockPosition.a(x, y, z);
         return blockLight[layer].a(SectionPosition.b(BlockPosition.b(l)), SectionPosition.b(BlockPosition.c(l)), SectionPosition.b(BlockPosition.d(l)));
@@ -219,19 +212,21 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
             @NotNull
             @Override
             public Iterator<CompoundTag> iterator() {
-                Iterable<CompoundTag> result = StreamSupport
-                    .stream(Iterables.concat(slices).spliterator(), false).map(input -> {
-                        BukkitImplAdapter adapter = WorldEditPlugin.getInstance()
-                            .getBukkitImplAdapter();
+                Iterable<CompoundTag> result = Iterables.transform(Iterables.concat(slices), new com.google.common.base.Function<Entity, CompoundTag>() {
+                    @Nullable
+                    @Override
+                    public CompoundTag apply(@Nullable Entity input) {
+                        BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
                         NBTTagCompound tag = new NBTTagCompound();
                         return (CompoundTag) adapter.toNative(input.save(tag));
-                    }).collect(Collectors.toList());
+                    }
+                });
                 return result.iterator();
             }
         };
     }
 
-    private void updateGet(BukkitGetBlocks_1_15 get, Chunk nmsChunk, ChunkSection[] sections, ChunkSection section, char[] arr, int layer) {
+    private void updateGet(BukkitGetBlocks_1_16_1 get, Chunk nmsChunk, ChunkSection[] sections, ChunkSection section, char[] arr, int layer) {
         synchronized (get) {
             if (this.nmsChunk != nmsChunk) {
                 this.nmsChunk = nmsChunk;
@@ -242,7 +237,7 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                 this.sections = sections.clone();
             }
             if (this.sections[layer] != section) {
-                this.sections[layer] = section;
+                this.sections[layer] = new ChunkSection[]{section}.clone()[0];
             }
             this.blocks[layer] = arr;
         }
@@ -253,8 +248,8 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
         entity.valid = false;
     }
 
-    public Chunk ensureLoaded(net.minecraft.server.v1_15_R1.World nmsWorld, int X, int Z) {
-        return BukkitAdapter_1_15.ensureLoaded(nmsWorld, X, Z);
+    public Chunk ensureLoaded(net.minecraft.server.v1_16_R1.World nmsWorld, int X, int Z) {
+        return BukkitAdapter_1_16_1.ensureLoaded(nmsWorld, X, Z);
     }
 
     @Override
@@ -266,6 +261,7 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
 
             // Remove existing tiles
             {
+                // Create a copy so that we can remove blocks
                 Map<BlockPosition, TileEntity> tiles = new HashMap<>(nmsChunk.getTileEntities());
                 if (!tiles.isEmpty()) {
                     for (Map.Entry<BlockPosition, TileEntity> entry : tiles.entrySet()) {
@@ -277,7 +273,9 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                         if (!set.hasSection(layer)) {
                             continue;
                         }
-                        if (set.getBlock(lx, ly, lz).getOrdinal() != 0) {
+
+                        int ordinal = set.getBlock(lx, ly, lz).getOrdinal();
+                        if (ordinal != 0) {
                             TileEntity tile = entry.getValue();
                             nmsChunk.removeTileEntity(tile.getPosition());
                         }
@@ -290,7 +288,9 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                 ChunkSection[] sections = nmsChunk.getSections();
 
                 for (int layer = 0; layer < 16; layer++) {
-                    if (!set.hasSection(layer)) continue;
+                    if (!set.hasSection(layer)){
+                        continue;
+                    }
 
                     bitMask |= 1 << layer;
 
@@ -298,23 +298,23 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                     ChunkSection newSection;
                     ChunkSection existingSection = sections[layer];
                     if (existingSection == null) {
-                        newSection = BukkitAdapter_1_15.newChunkSection(layer, setArr, fastmode);
-                        if (BukkitAdapter_1_15.setSectionAtomic(sections, null, newSection, layer)) {
+                        newSection = BukkitAdapter_1_16_1.newChunkSection(layer, setArr, fastmode);
+                        if (BukkitAdapter_1_16_1.setSectionAtomic(sections, null, newSection, layer)) {
                             updateGet(this, nmsChunk, sections, newSection, setArr, layer);
                             continue;
                         } else {
                             existingSection = sections[layer];
                             if (existingSection == null) {
-                                System.out.println("Skipping invalid null section. chunk:" + X + "," + Z + " layer: " + layer);
+                                log.error("Skipping invalid null section. chunk:" + X + "," + Z + " layer: " + layer);
                                 continue;
                             }
                         }
                     }
+                    BukkitAdapter_1_16_1.fieldTickingBlockCount.set(existingSection, (short) 0);
 
                     //ensure that the server doesn't try to tick the chunksection while we're editing it.
-                    BukkitAdapter_1_15.fieldTickingBlockCount.set(existingSection, (short) 0);
+                    DelegateLock lock = BukkitAdapter_1_16_1.applyLock(existingSection);
 
-                    DelegateLock lock = BukkitAdapter_1_15.applyLock(existingSection);
                     synchronized (this) {
                         synchronized (lock) {
                             lock.untilFree();
@@ -330,9 +330,11 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                             } else if (lock.isModified()) {
                                 this.reset(layer);
                             }
-                            newSection = BukkitAdapter_1_15.newChunkSection(layer, this::load, setArr, fastmode);
-                            if (!BukkitAdapter_1_15.setSectionAtomic(sections, existingSection, newSection, layer)) {
-                                System.out.println("Failed to set chunk section:" + X + "," + Z + " layer: " + layer);
+                            newSection = BukkitAdapter_1_16_1
+                                .newChunkSection(layer, this::load, setArr, fastmode);
+                            if (!BukkitAdapter_1_16_1
+                                .setSectionAtomic(sections, existingSection, newSection, layer)) {
+                                log.error("Failed to set chunk section:" + X + "," + Z + " layer: " + layer);
                                 continue;
                             } else {
                                 updateGet(this, nmsChunk, sections, newSection, setArr, layer);
@@ -421,7 +423,8 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                             final ListTag posTag = (ListTag) entityTagMap.get("Pos");
                             final ListTag rotTag = (ListTag) entityTagMap.get("Rotation");
                             if (idTag == null || posTag == null || rotTag == null) {
-                                getLogger(BukkitGetBlocks_1_15.class).debug("Unknown entity tag: " + nativeTag);
+                                getLogger(
+                                    BukkitGetBlocks_1_16_1.class).debug("Unknown entity tag: " + nativeTag);
                                 continue;
                             }
                             final double x = posTag.getDouble(0);
@@ -444,7 +447,7 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                                         for (final String name : Constants.NO_COPY_ENTITY_NBT_FIELDS) {
                                             tag.remove(name);
                                         }
-                                        entity.f(tag);
+                                        entity.save(tag);
                                     }
                                     entity.setLocation(x, y, z, yaw, pitch);
                                     nmsWorld.addEntity(entity, CreatureSpawnEvent.SpawnReason.CUSTOM);
@@ -481,7 +484,7 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                                     tag.set("x", NBTTagInt.a(x));
                                     tag.set("y", NBTTagInt.a(y));
                                     tag.set("z", NBTTagInt.a(z));
-                                    tileEntity.load(tag);
+                                    tileEntity.load(tileEntity.getBlock(), tag);
                                 }
                             }
                         }
@@ -500,7 +503,7 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                         nmsChunk.mustNotSave = false;
                         nmsChunk.markDirty();
                         // send to player
-                        BukkitAdapter_1_15.sendChunk(nmsWorld, X, Z, finalMask, finalLightUpdate);
+                        BukkitAdapter_1_16_1.sendChunk(nmsWorld, X, Z, finalMask, finalLightUpdate);
                         if (finalizer != null) finalizer.run();
                     };
                 }
@@ -554,31 +557,27 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
         if (data == null || data == FaweCache.IMP.EMPTY_CHAR_4096) {
             data = new char[4096];
         }
-        DelegateLock lock = BukkitAdapter_1_15.applyLock(section);
+        DelegateLock lock = BukkitAdapter_1_16_1.applyLock(section);
         synchronized (lock) {
             lock.untilFree();
             lock.setModified(false);
             // Efficiently convert ChunkSection to raw data
             try {
-                FAWE_Spigot_v1_15_R1 adapter = ((FAWE_Spigot_v1_15_R1) WorldEditPlugin.getInstance().getBukkitImplAdapter());
+                FAWE_Spigot_v1_16_R1 adapter = ((FAWE_Spigot_v1_16_R1) WorldEditPlugin.getInstance().getBukkitImplAdapter());
 
                 final DataPaletteBlock<IBlockData> blocks = section.getBlocks();
-                final DataBits bits = (DataBits) BukkitAdapter_1_15.fieldBits.get(blocks);
-                final DataPalette<IBlockData> palette = (DataPalette<IBlockData>) BukkitAdapter_1_15.fieldPalette.get(blocks);
+                final DataBits bits = (DataBits) BukkitAdapter_1_16_1.fieldBits.get(blocks);
+                final DataPalette<IBlockData> palette = (DataPalette<IBlockData>) BukkitAdapter_1_16_1.fieldPalette.get(blocks);
 
-                //getBits()
-                final int bitsPerEntry = bits.c();
-                //getRaw()
+                final int bitsPerEntry = (int) BukkitAdapter_1_16_1.fieldBitsPerEntry.get(bits);
                 final long[] blockStates = bits.a();
 
-                new BitArray(bitsPerEntry, 4096, blockStates).toRaw(data);
+                new BitArrayUnstretched(bitsPerEntry, blockStates).toRaw(data);
 
                 int num_palette;
                 if (palette instanceof DataPaletteLinear) {
-                    //Get the size of the palette
                     num_palette = ((DataPaletteLinear<IBlockData>) palette).b();
                 } else if (palette instanceof DataPaletteHash) {
-                    //Get the size of the palette
                     num_palette = ((DataPaletteHash<IBlockData>) palette).b();
                 } else {
                     num_palette = 0;
@@ -590,7 +589,6 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                             char ordinal = paletteToBlockChars[paletteVal];
                             if (ordinal == Character.MAX_VALUE) {
                                 paletteToBlockInts[num_palette++] = paletteVal;
-                                //palette.a(Object) is palette.idFor(Object)
                                 IBlockData ibd = palette.a(data[i]);
                                 if (ibd == null) {
                                     ordinal = BlockTypes.AIR.getDefaultState().getOrdinalChar();
@@ -614,7 +612,6 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                 try {
                     if (num_palette != 1) {
                         for (int i = 0; i < num_palette; i++) {
-                            //palette.a(Object) is palette.idFor(Object)
                             char ordinal = ordinal(palette.a(i), adapter);
                             paletteToOrdinal[i] = ordinal;
                         }
@@ -644,7 +641,7 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
         }
     }
 
-    private final char ordinal(IBlockData ibd, FAWE_Spigot_v1_15_R1 adapter) {
+    private final char ordinal(IBlockData ibd, FAWE_Spigot_v1_16_R1 adapter) {
         if (ibd == null) {
             return BlockTypes.AIR.getDefaultState().getOrdinalChar();
         } else {
@@ -684,9 +681,13 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
             if (light[Y] == null) {
                 continue;
             }
-            NibbleArray nibble = world.getChunkProvider().getLightEngine().a(skyBlock).a(SectionPosition.a(nmsChunk.getPos(), Y));
+            SectionPosition sectionPosition = SectionPosition.a(nmsChunk.getPos(), Y);
+            NibbleArray nibble = world.getChunkProvider().getLightEngine().a(skyBlock).a(sectionPosition);
             if (nibble == null) {
-                continue;
+                byte[] a = new byte[2048];
+                Arrays.fill(a, skyBlock == EnumSkyBlock.SKY ? (byte) 15 : (byte) 0);
+                nibble = new NibbleArray(a);
+                ((LightEngine) world.getChunkProvider().getLightEngine()).a(skyBlock, sectionPosition, nibble, true);
             }
             synchronized (nibble) {
                 for (int i = 0; i < 4096; i++) {
@@ -705,6 +706,8 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
 
     @Override
     public boolean trim(boolean aggressive) {
+        skyLight = new NibbleArray[16];
+        blockLight = new NibbleArray[16];
         if (aggressive) {
             sections = null;
             nmsChunk = null;
@@ -718,7 +721,7 @@ public class BukkitGetBlocks_1_15 extends CharGetBlocks {
                 try {
                     final DataPaletteBlock<IBlockData> blocksExisting = existing.getBlocks();
 
-                    final DataPalette<IBlockData> palette = (DataPalette<IBlockData>) BukkitAdapter_1_15.fieldPalette.get(blocksExisting);
+                    final DataPalette<IBlockData> palette = (DataPalette<IBlockData>) BukkitAdapter_1_16_1.fieldPalette.get(blocksExisting);
                     int paletteSize;
 
                     if (palette instanceof DataPaletteLinear) {

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_16_1/FAWEWorldNativeAccess_1_16.java

@@ -0,0 +1,174 @@
+package com.boydti.fawe.bukkit.adapter.mc1_16_1;
+
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.bukkit.BukkitAdapter;
+import com.sk89q.worldedit.bukkit.adapter.impl.FAWE_Spigot_v1_16_R1;
+import com.sk89q.worldedit.internal.block.BlockStateIdAccess;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+import net.minecraft.server.v1_16_R1.Block;
+import net.minecraft.server.v1_16_R1.BlockPosition;
+import net.minecraft.server.v1_16_R1.Chunk;
+import net.minecraft.server.v1_16_R1.ChunkProviderServer;
+import net.minecraft.server.v1_16_R1.EnumDirection;
+import net.minecraft.server.v1_16_R1.IBlockData;
+import net.minecraft.server.v1_16_R1.NBTBase;
+import net.minecraft.server.v1_16_R1.NBTTagCompound;
+import net.minecraft.server.v1_16_R1.PlayerChunk;
+import net.minecraft.server.v1_16_R1.TileEntity;
+import net.minecraft.server.v1_16_R1.World;
+import org.bukkit.craftbukkit.v1_16_R1.CraftWorld;
+import org.bukkit.craftbukkit.v1_16_R1.block.data.CraftBlockData;
+import org.bukkit.event.block.BlockPhysicsEvent;
+
+import javax.annotation.Nullable;
+import java.lang.ref.WeakReference;
+import java.util.Objects;
+
+public class FAWEWorldNativeAccess_1_16 implements WorldNativeAccess<Chunk, IBlockData, BlockPosition> {
+    private static final int UPDATE = 1, NOTIFY = 2;
+
+    private final FAWE_Spigot_v1_16_R1 adapter;
+    private final WeakReference<World> world;
+    private SideEffectSet sideEffectSet;
+
+    public FAWEWorldNativeAccess_1_16(FAWE_Spigot_v1_16_R1 adapter, WeakReference<World> world) {
+        this.adapter = adapter;
+        this.world = world;
+    }
+
+    private World getWorld() {
+        return Objects.requireNonNull(world.get(), "The reference to the world was lost");
+    }
+
+    @Override
+    public void setCurrentSideEffectSet(SideEffectSet sideEffectSet) {
+        this.sideEffectSet = sideEffectSet;
+    }
+
+    @Override
+    public Chunk getChunk(int x, int z) {
+        return getWorld().getChunkAt(x, z);
+    }
+
+    @Override
+    public IBlockData toNative(BlockState state) {
+        int stateId = BlockStateIdAccess.getBlockStateId(state);
+        return BlockStateIdAccess.isValidInternalId(stateId)
+                ? Block.getByCombinedId(stateId)
+                : ((CraftBlockData) BukkitAdapter.adapt(state)).getState();
+    }
+
+    @Override
+    public IBlockData getBlockState(Chunk chunk, BlockPosition position) {
+        return chunk.getType(position);
+    }
+
+    @Nullable
+    @Override
+    public IBlockData setBlockState(Chunk chunk, BlockPosition position, IBlockData state) {
+        return chunk.setType(position, state, false);
+    }
+
+    @Override
+    public IBlockData getValidBlockForPosition(IBlockData block, BlockPosition position) {
+        return Block.b(block, getWorld(), position);
+    }
+
+    @Override
+    public BlockPosition getPosition(int x, int y, int z) {
+        return new BlockPosition(x, y, z);
+    }
+
+    @Override
+    public void updateLightingForBlock(BlockPosition position) {
+        getWorld().getChunkProvider().getLightEngine().a(position);
+    }
+
+    @Override
+    public boolean updateTileEntity(BlockPosition position, CompoundTag tag) {
+        // We will assume that the tile entity was created for us,
+        // though we do not do this on the other versions
+        TileEntity tileEntity = getWorld().getTileEntity(position);
+        if (tileEntity == null) {
+            return false;
+        }
+        NBTBase nativeTag = adapter.fromNative(tag);
+        tileEntity.load(tileEntity.getBlock(), (NBTTagCompound) nativeTag);
+        return true;
+    }
+
+    @Override
+    public void notifyBlockUpdate(BlockPosition position, IBlockData oldState, IBlockData newState) {
+        getWorld().notify(position, oldState, newState, UPDATE | NOTIFY);
+    }
+
+    @Override
+    public boolean isChunkTicking(Chunk chunk) {
+        return chunk.getState().isAtLeast(PlayerChunk.State.TICKING);
+    }
+
+    @Override
+    public void markBlockChanged(BlockPosition position) {
+        ((ChunkProviderServer) getWorld().getChunkProvider()).flagDirty(position);
+    }
+
+    private static final EnumDirection[] NEIGHBOUR_ORDER = {
+            EnumDirection.WEST, EnumDirection.EAST,
+            EnumDirection.DOWN, EnumDirection.UP,
+            EnumDirection.NORTH, EnumDirection.SOUTH
+    };
+
+    @Override
+    public void notifyNeighbors(BlockPosition pos, IBlockData oldState, IBlockData newState) {
+        World world = getWorld();
+        if (sideEffectSet.shouldApply(SideEffect.EVENTS)) {
+            world.update(pos, oldState.getBlock());
+        } else {
+            // When we don't want events, manually run the physics without them.
+            // Un-nest neighbour updating
+            for (EnumDirection direction : NEIGHBOUR_ORDER) {
+                BlockPosition shifted = pos.shift(direction);
+                world.getType(shifted).doPhysics(world, shifted, oldState.getBlock(), pos, false);
+            }
+        }
+        if (newState.isComplexRedstone()) {
+            world.updateAdjacentComparators(pos, newState.getBlock());
+        }
+    }
+
+    @Override
+    public void updateNeighbors(BlockPosition pos, IBlockData oldState, IBlockData newState, int recursionLimit) {
+        World world = getWorld();
+        // a == updateNeighbors
+        // b == updateDiagonalNeighbors
+        oldState.b(world, pos, NOTIFY, recursionLimit);
+        if (sideEffectSet.shouldApply(SideEffect.EVENTS)) {
+            CraftWorld craftWorld = world.getWorld();
+            if (craftWorld != null) {
+                BlockPhysicsEvent event = new BlockPhysicsEvent(craftWorld.getBlockAt(pos.getX(), pos.getY(), pos.getZ()), CraftBlockData.fromData(newState));
+                world.getServer().getPluginManager().callEvent(event);
+                if (event.isCancelled()) {
+                    return;
+                }
+            }
+        }
+        newState.a(world, pos, NOTIFY, recursionLimit);
+        newState.b(world, pos, NOTIFY, recursionLimit);
+    }
+
+    @Override
+    public void onBlockStateChange(BlockPosition pos, IBlockData oldState, IBlockData newState) {
+        getWorld().a(pos, oldState, newState);
+    }
+
+    @Override
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
+        return this.adapter.setBlock(this.getChunk(position.getBlockX() >> 4, position.getBlockZ() >> 4).bukkitChunk, position.getBlockX(), position.getBlockY(), position.getBlockZ(), block, sideEffectSet.shouldApply(SideEffect.LIGHTING));
+    }
+}

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_16_1/MapChunkUtil_1_16_1.java

@@ -1,17 +1,17 @@
-package com.boydti.fawe.bukkit.adapter.mc1_15;
+package com.boydti.fawe.bukkit.adapter.mc1_16_1;
 
 import com.boydti.fawe.bukkit.adapter.MapChunkUtil;
-import net.minecraft.server.v1_15_R1.PacketPlayOutMapChunk;
+import net.minecraft.server.v1_16_R1.PacketPlayOutMapChunk;
 
-public class MapChunkUtil_1_15 extends MapChunkUtil<PacketPlayOutMapChunk> {
-    public MapChunkUtil_1_15() throws NoSuchFieldException {
+public class MapChunkUtil_1_16_1 extends MapChunkUtil<PacketPlayOutMapChunk> {
+    public MapChunkUtil_1_16_1() throws NoSuchFieldException {
         fieldX = PacketPlayOutMapChunk.class.getDeclaredField("a");
         fieldZ = PacketPlayOutMapChunk.class.getDeclaredField("b");
         fieldBitMask = PacketPlayOutMapChunk.class.getDeclaredField("c");
         fieldHeightMap = PacketPlayOutMapChunk.class.getDeclaredField("d");
-        fieldChunkData = PacketPlayOutMapChunk.class.getDeclaredField("e");
-        fieldBlockEntities = PacketPlayOutMapChunk.class.getDeclaredField("f");
-        fieldFull = PacketPlayOutMapChunk.class.getDeclaredField("g");
+        fieldChunkData = PacketPlayOutMapChunk.class.getDeclaredField("f");
+        fieldBlockEntities = PacketPlayOutMapChunk.class.getDeclaredField("g");
+        fieldFull = PacketPlayOutMapChunk.class.getDeclaredField("h");
         fieldX.setAccessible(true);
         fieldZ.setAccessible(true);
         fieldBitMask.setAccessible(true);

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_16_1/nbt/LazyCompoundTag_1_16_1.java

@@ -1,14 +1,14 @@
-package com.boydti.fawe.bukkit.adapter.mc1_15.nbt;
+package com.boydti.fawe.bukkit.adapter.mc1_16_1.nbt;
 
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.ListTag;
 import com.sk89q.jnbt.StringTag;
 import com.sk89q.jnbt.Tag;
 import com.sk89q.worldedit.bukkit.WorldEditPlugin;
-import net.minecraft.server.v1_15_R1.NBTBase;
-import net.minecraft.server.v1_15_R1.NBTNumber;
-import net.minecraft.server.v1_15_R1.NBTTagCompound;
-import net.minecraft.server.v1_15_R1.NBTTagList;
+import net.minecraft.server.v1_16_R1.NBTBase;
+import net.minecraft.server.v1_16_R1.NBTNumber;
+import net.minecraft.server.v1_16_R1.NBTTagCompound;
+import net.minecraft.server.v1_16_R1.NBTTagList;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -16,15 +16,15 @@ import java.util.List;
 import java.util.Map;
 import java.util.function.Supplier;
 
-public class LazyCompoundTag_1_15 extends CompoundTag {
+public class LazyCompoundTag_1_16_1 extends CompoundTag {
     private final Supplier<NBTTagCompound> nmsTag;
 
-    public LazyCompoundTag_1_15(Supplier<NBTTagCompound> tag) {
+    public LazyCompoundTag_1_16_1(Supplier<NBTTagCompound> tag) {
         super(null);
         this.nmsTag = tag;
     }
 
-    public LazyCompoundTag_1_15(NBTTagCompound tag) {
+    public LazyCompoundTag_1_16_1(NBTTagCompound tag) {
         this(() -> tag);
     }
 
@@ -93,7 +93,7 @@ public class LazyCompoundTag_1_15 extends CompoundTag {
             NBTTagList nbtList = (NBTTagList) tag;
             for (NBTBase elem : nbtList) {
                 if (elem instanceof NBTTagCompound) {
-                    list.add(new LazyCompoundTag_1_15((NBTTagCompound) elem));
+                    list.add(new LazyCompoundTag_1_16_1((NBTTagCompound) elem));
                 } else {
                     list.add(WorldEditPlugin.getInstance().getBukkitImplAdapter().toNative(elem));
                 }
@@ -149,4 +149,4 @@ public class LazyCompoundTag_1_15 extends CompoundTag {
     public String toString() {
         return nmsTag.get().toString();
     }
-}
+}

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/wrapper/AsyncWorld.java

@@ -84,7 +84,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     private BukkitImplAdapter adapter;
 
     @Override
-    public <T> void spawnParticle(Particle particle, double v, double v1, double v2, int i, double v3, double v4, double v5, double v6, T t) {
+    public <T> void spawnParticle(@NotNull Particle particle, double v, double v1, double v2, int i, double v3, double v4, double v5, double v6, T t) {
         parent.spawnParticle(particle, v, v1, v2, i, v3, v4, v5, v6, t);
     }
 
@@ -158,77 +158,77 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public WorldBorder getWorldBorder() {
+    public @NotNull WorldBorder getWorldBorder() {
         return TaskManager.IMP.sync(() -> parent.getWorldBorder());
     }
 
     @Override
-    public void spawnParticle(Particle particle, Location location, int i) {
+    public void spawnParticle(@NotNull Particle particle, @NotNull Location location, int i) {
         parent.spawnParticle(particle, location, i);
     }
 
     @Override
-    public void spawnParticle(Particle particle, double v, double v1, double v2, int i) {
+    public void spawnParticle(@NotNull Particle particle, double v, double v1, double v2, int i) {
         parent.spawnParticle(particle, v, v1, v2, i);
     }
 
     @Override
-    public <T> void spawnParticle(Particle particle, Location location, int i, T t) {
+    public <T> void spawnParticle(@NotNull Particle particle, @NotNull Location location, int i, T t) {
         parent.spawnParticle(particle, location, i, t);
     }
 
     @Override
-    public <T> void spawnParticle(Particle particle, double x, double y, double z, int count, T data) {
+    public <T> void spawnParticle(@NotNull Particle particle, double x, double y, double z, int count, T data) {
         parent.spawnParticle(particle, x, y, z, count, data);
     }
 
     @Override
-    public void spawnParticle(Particle particle, Location location, int count, double offsetX, double offsetY, double offsetZ) {
+    public void spawnParticle(@NotNull Particle particle, @NotNull Location location, int count, double offsetX, double offsetY, double offsetZ) {
         parent.spawnParticle(particle, location, count, offsetX, offsetY, offsetZ);
     }
 
     @Override
-    public void spawnParticle(Particle particle, double v, double v1, double v2, int i, double v3, double v4, double v5) {
+    public void spawnParticle(@NotNull Particle particle, double v, double v1, double v2, int i, double v3, double v4, double v5) {
         parent.spawnParticle(particle, v, v1, v2, i, v3, v4, v5);
     }
 
     @Override
-    public <T> void spawnParticle(Particle particle, Location location, int i, double v, double v1, double v2, T t) {
+    public <T> void spawnParticle(@NotNull Particle particle, @NotNull Location location, int i, double v, double v1, double v2, T t) {
         parent.spawnParticle(particle, location, i, v, v1, v2, t);
     }
 
     @Override
-    public <T> void spawnParticle(Particle particle, double v, double v1, double v2, int i, double v3, double v4, double v5, T t) {
+    public <T> void spawnParticle(@NotNull Particle particle, double v, double v1, double v2, int i, double v3, double v4, double v5, T t) {
         parent.spawnParticle(particle, v, v1, v2, i, v3, v4, v5, t);
     }
 
     @Override
-    public void spawnParticle(Particle particle, Location location, int i, double v, double v1, double v2, double v3) {
+    public void spawnParticle(@NotNull Particle particle, @NotNull Location location, int i, double v, double v1, double v2, double v3) {
         parent.spawnParticle(particle, location, i, v, v1, v2, v3);
     }
 
     @Override
-    public void spawnParticle(Particle particle, double v, double v1, double v2, int i, double v3, double v4, double v5, double v6) {
+    public void spawnParticle(@NotNull Particle particle, double v, double v1, double v2, int i, double v3, double v4, double v5, double v6) {
         parent.spawnParticle(particle, v, v1, v2, i, v3, v4, v5, v6);
     }
 
     @Override
-    public <T> void spawnParticle(Particle particle, Location location, int i, double v, double v1, double v2, double v3, T t) {
+    public <T> void spawnParticle(@NotNull Particle particle, @NotNull Location location, int i, double v, double v1, double v2, double v3, T t) {
         parent.spawnParticle(particle, location, i, v, v1, v2, v3, t);
     }
 
     @Override
-    public boolean setSpawnLocation(Location location) {
+    public boolean setSpawnLocation(@NotNull Location location) {
         return parent.setSpawnLocation(location);
     }
 
     @Override
-    public AsyncBlock getBlockAt(final int x, final int y, final int z) {
+    public @NotNull AsyncBlock getBlockAt(final int x, final int y, final int z) {
         return new AsyncBlock(this, x, y, z);
     }
 
     @Override
-    public AsyncBlock getBlockAt(Location loc) {
+    public @NotNull AsyncBlock getBlockAt(Location loc) {
         return getBlockAt(loc.getBlockX(), loc.getBlockY(), loc.getBlockZ());
     }
 
@@ -247,13 +247,13 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public AsyncBlock getHighestBlockAt(int x, int z) {
+    public @NotNull AsyncBlock getHighestBlockAt(int x, int z) {
         int y = getHighestBlockYAt(x, z);
         return getBlockAt(x, y, z);
     }
 
     @Override
-    public AsyncBlock getHighestBlockAt(Location loc) {
+    public @NotNull AsyncBlock getHighestBlockAt(Location loc) {
         return getHighestBlockAt(loc.getBlockX(), loc.getBlockZ());
     }
 
@@ -279,17 +279,17 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public AsyncChunk getChunkAt(int x, int z) {
+    public @NotNull AsyncChunk getChunkAt(int x, int z) {
         return new AsyncChunk(this, x, z);
     }
 
     @Override
-    public AsyncChunk getChunkAt(Location location) {
+    public @NotNull AsyncChunk getChunkAt(Location location) {
         return getChunkAt(location.getBlockX(), location.getBlockZ());
     }
 
     @Override
-    public AsyncChunk getChunkAt(Block block) {
+    public @NotNull AsyncChunk getChunkAt(Block block) {
         return getChunkAt(block.getX(), block.getZ());
     }
 
@@ -405,17 +405,17 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public Item dropItem(final Location location, final ItemStack item) {
+    public @NotNull Item dropItem(final @NotNull Location location, final @NotNull ItemStack item) {
         return TaskManager.IMP.sync(() -> parent.dropItem(location, item));
     }
 
     @Override
-    public Item dropItemNaturally(final Location location, final ItemStack item) {
+    public @NotNull Item dropItemNaturally(final @NotNull Location location, final @NotNull ItemStack item) {
         return TaskManager.IMP.sync(() -> parent.dropItemNaturally(location, item));
     }
 
     @Override
-    public Arrow spawnArrow(final Location location, final Vector direction, final float speed, final float spread) {
+    public @NotNull Arrow spawnArrow(final @NotNull Location location, final @NotNull Vector direction, final float speed, final float spread) {
         return TaskManager.IMP.sync(() -> parent.spawnArrow(location, direction, speed, spread));
     }
 
@@ -425,78 +425,78 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public boolean generateTree(final Location location, final TreeType type) {
+    public boolean generateTree(final @NotNull Location location, final @NotNull TreeType type) {
         return TaskManager.IMP.sync(() -> parent.generateTree(location, type));
     }
 
     @Override
-    public boolean generateTree(final Location loc, final TreeType type, final BlockChangeDelegate delegate) {
+    public boolean generateTree(final @NotNull Location loc, final @NotNull TreeType type, final @NotNull BlockChangeDelegate delegate) {
         return TaskManager.IMP.sync(() -> parent.generateTree(loc, type, delegate));
     }
 
     @Override
-    public Entity spawnEntity(Location loc, EntityType type) {
+    public @NotNull Entity spawnEntity(@NotNull Location loc, EntityType type) {
         return spawn(loc, type.getEntityClass());
     }
 
     @Override
-    public LightningStrike strikeLightning(final Location loc) {
+    public @NotNull LightningStrike strikeLightning(final @NotNull Location loc) {
         return TaskManager.IMP.sync(() -> parent.strikeLightning(loc));
     }
 
     @Override
-    public LightningStrike strikeLightningEffect(final Location loc) {
+    public @NotNull LightningStrike strikeLightningEffect(final @NotNull Location loc) {
         return TaskManager.IMP.sync(() -> parent.strikeLightningEffect(loc));
     }
 
     @Override
-    public List getEntities() {
+    public @NotNull List getEntities() {
         return TaskManager.IMP.sync(() -> parent.getEntities());
     }
 
     @Override
-    public List<LivingEntity> getLivingEntities() {
+    public @NotNull List<LivingEntity> getLivingEntities() {
         return TaskManager.IMP.sync(() -> parent.getLivingEntities());
     }
 
     @Override
     @Deprecated
-    public <T extends Entity> Collection<T> getEntitiesByClass(final Class<T>... classes) {
+    public <T extends Entity> @NotNull Collection<T> getEntitiesByClass(final Class<T>... classes) {
         return TaskManager.IMP.sync(() -> parent.getEntitiesByClass(classes));
     }
 
     @Override
-    public <T extends Entity> Collection<T> getEntitiesByClass(final Class<T> cls) {
+    public <T extends Entity> @NotNull Collection<T> getEntitiesByClass(final @NotNull Class<T> cls) {
         return TaskManager.IMP.sync(() -> parent.getEntitiesByClass(cls));
     }
 
     @Override
-    public Collection<Entity> getEntitiesByClasses(final Class<?>... classes) {
+    public @NotNull Collection<Entity> getEntitiesByClasses(final Class<?>... classes) {
         return TaskManager.IMP.sync(() -> parent.getEntitiesByClasses(classes));
     }
 
     @Override
-    public List<Player> getPlayers() {
+    public @NotNull List<Player> getPlayers() {
         return TaskManager.IMP.sync(() -> parent.getPlayers());
     }
 
     @Override
-    public Collection<Entity> getNearbyEntities(final Location location, final double x, final double y, final double z) {
+    public @NotNull Collection<Entity> getNearbyEntities(final @NotNull Location location, final double x, final double y, final double z) {
         return TaskManager.IMP.sync(() -> parent.getNearbyEntities(location, x, y, z));
     }
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return parent.getName();
     }
 
     @Override
-    public UUID getUID() {
+    public @NotNull UUID getUID() {
         return parent.getUID();
     }
 
     @Override
-    public Location getSpawnLocation() {
+    public @NotNull Location getSpawnLocation() {
         return parent.getSpawnLocation();
     }
 
@@ -590,7 +590,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public boolean createExplosion(Location loc, float power) {
+    public boolean createExplosion(@NotNull Location loc, float power) {
         return this.createExplosion(loc, power, false);
     }
 
@@ -636,17 +636,17 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public List<BlockPopulator> getPopulators() {
+    public @NotNull List<BlockPopulator> getPopulators() {
         return parent.getPopulators();
     }
 
     @Override
-    public <T extends Entity> T spawn(final Location location, final Class<T> clazz) throws IllegalArgumentException {
+    public <T extends Entity> @NotNull T spawn(final @NotNull Location location, final @NotNull Class<T> clazz) throws IllegalArgumentException {
         return TaskManager.IMP.sync(() -> parent.spawn(location, clazz));
     }
 
     @Override
-    public <T extends Entity> T spawn(Location location, Class<T> clazz, Consumer<T> function) throws IllegalArgumentException {
+    public <T extends Entity> @NotNull T spawn(@NotNull Location location, @NotNull Class<T> clazz, Consumer<T> function) throws IllegalArgumentException {
         return TaskManager.IMP.sync(() -> parent.spawn(location, clazz, function));
     }
 
@@ -656,28 +656,28 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public FallingBlock spawnFallingBlock(Location location, MaterialData data) throws IllegalArgumentException {
+    public @NotNull FallingBlock spawnFallingBlock(@NotNull Location location, @NotNull MaterialData data) throws IllegalArgumentException {
         return TaskManager.IMP.sync(() -> parent.spawnFallingBlock(location, data));
     }
 
     @Override
     @Deprecated
-    public FallingBlock spawnFallingBlock(Location location, Material material, byte data) throws IllegalArgumentException {
+    public @NotNull FallingBlock spawnFallingBlock(@NotNull Location location, @NotNull Material material, byte data) throws IllegalArgumentException {
         return TaskManager.IMP.sync(() -> parent.spawnFallingBlock(location, material, data));
     }
 
     @Override
-    public FallingBlock spawnFallingBlock(Location location, BlockData blockData) throws IllegalArgumentException {
+    public @NotNull FallingBlock spawnFallingBlock(@NotNull Location location, @NotNull BlockData blockData) throws IllegalArgumentException {
         return TaskManager.IMP.sync(() -> parent.spawnFallingBlock(location, blockData));
     }
 
     @Override
-    public void playEffect(Location location, Effect effect, int data) {
+    public void playEffect(@NotNull Location location, @NotNull Effect effect, int data) {
         this.playEffect(location, effect, data, 64);
     }
 
     @Override
-    public void playEffect(final Location location, final Effect effect, final int data, final int radius) {
+    public void playEffect(final @NotNull Location location, final @NotNull Effect effect, final int data, final int radius) {
         TaskManager.IMP.sync(new RunnableVal<Object>() {
             @Override
             public void run(Object value) {
@@ -687,12 +687,12 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public <T> void playEffect(Location loc, Effect effect, T data) {
+    public <T> void playEffect(@NotNull Location loc, @NotNull Effect effect, T data) {
         this.playEffect(loc, effect, data, 64);
     }
 
     @Override
-    public <T> void playEffect(final Location location, final Effect effect, final T data, final int radius) {
+    public <T> void playEffect(final @NotNull Location location, final @NotNull Effect effect, final T data, final int radius) {
         TaskManager.IMP.sync(new RunnableVal<Object>() {
             @Override
             public void run(Object value) {
@@ -702,7 +702,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public ChunkSnapshot getEmptyChunkSnapshot(final int x, final int z, final boolean includeBiome, final boolean includeBiomeTempRain) {
+    public @NotNull ChunkSnapshot getEmptyChunkSnapshot(final int x, final int z, final boolean includeBiome, final boolean includeBiomeTempRain) {
         return TaskManager.IMP.sync(
             () -> parent.getEmptyChunkSnapshot(x, z, includeBiome, includeBiomeTempRain));
     }
@@ -723,7 +723,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public Biome getBiome(int x, int z) {
+    public @NotNull Biome getBiome(int x, int z) {
         return adapter.adapt(getExtent().getBiomeType(x, 0, z));
     }
 
@@ -733,7 +733,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public void setBiome(int x, int z, Biome bio) {
+    public void setBiome(int x, int z, @NotNull Biome bio) {
         BiomeType biome = adapter.adapt(bio);
         getExtent().setBiome(x, 0, z, biome);
     }
@@ -800,17 +800,17 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public void setDifficulty(Difficulty difficulty) {
+    public void setDifficulty(@NotNull Difficulty difficulty) {
         parent.setDifficulty(difficulty);
     }
 
     @Override
-    public Difficulty getDifficulty() {
+    public @NotNull Difficulty getDifficulty() {
         return parent.getDifficulty();
     }
 
     @Override
-    public File getWorldFolder() {
+    public @NotNull File getWorldFolder() {
         return parent.getWorldFolder();
     }
 
@@ -884,6 +884,14 @@ public class AsyncWorld extends PassthroughExtent implements World {
         parent.setWaterAnimalSpawnLimit(limit);
     }
 
+    @Override public int getWaterAmbientSpawnLimit() {
+        return parent.getWaterAmbientSpawnLimit();
+    }
+
+    @Override public void setWaterAmbientSpawnLimit(int limit) {
+        parent.setWaterAmbientSpawnLimit(limit);
+    }
+
     @Override
     public int getAmbientSpawnLimit() {
         return parent.getAmbientSpawnLimit();
@@ -895,7 +903,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public void playSound(final Location location, final Sound sound, final float volume, final float pitch) {
+    public void playSound(final @NotNull Location location, final @NotNull Sound sound, final float volume, final float pitch) {
         TaskManager.IMP.sync(new RunnableVal<Object>() {
             @Override
             public void run(Object value) {
@@ -905,7 +913,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public void playSound(final Location location, final String sound, final float volume, final float pitch) {
+    public void playSound(final @NotNull Location location, final @NotNull String sound, final float volume, final float pitch) {
         TaskManager.IMP.sync(new RunnableVal<Object>() {
             @Override
             public void run(Object value) {
@@ -915,7 +923,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public void playSound(Location location, Sound sound, SoundCategory category, float volume, float pitch) {
+    public void playSound(@NotNull Location location, @NotNull Sound sound, @NotNull SoundCategory category, float volume, float pitch) {
         TaskManager.IMP.sync(new RunnableVal<Object>() {
             @Override
             public void run(Object value) {
@@ -925,7 +933,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public void playSound(Location location, String sound, SoundCategory category, float volume, float pitch) {
+    public void playSound(@NotNull Location location, @NotNull String sound, @NotNull SoundCategory category, float volume, float pitch) {
         TaskManager.IMP.sync(new RunnableVal<Object>() {
             @Override
             public void run(Object value) {
@@ -945,32 +953,32 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public boolean setGameRuleValue(String rule, String value) {
+    public boolean setGameRuleValue(@NotNull String rule, @NotNull String value) {
         return parent.setGameRuleValue(rule, value);
     }
 
     @Override
-    public boolean isGameRule(String rule) {
+    public boolean isGameRule(@NotNull String rule) {
         return parent.isGameRule(rule);
     }
 
     @Override
-    public <T> T getGameRuleValue(GameRule<T> gameRule) {
+    public <T> T getGameRuleValue(@NotNull GameRule<T> gameRule) {
         return parent.getGameRuleValue(gameRule);
     }
 
     @Override
-    public <T> T getGameRuleDefault(GameRule<T> gameRule) {
+    public <T> T getGameRuleDefault(@NotNull GameRule<T> gameRule) {
         return parent.getGameRuleDefault(gameRule);
     }
 
     @Override
-    public <T> boolean setGameRule(GameRule<T> gameRule, T t) {
+    public <T> boolean setGameRule(@NotNull GameRule<T> gameRule, @NotNull T t) {
         return parent.setGameRule(gameRule, t);
     }
 
     @Override
-    public Spigot spigot() {
+    public @NotNull Spigot spigot() {
         return parent.spigot();
     }
 
@@ -985,7 +993,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public void setMetadata(final String key, final MetadataValue meta) {
+    public void setMetadata(final @NotNull String key, final @NotNull MetadataValue meta) {
         TaskManager.IMP.sync(new RunnableVal<Object>() {
             @Override
             public void run(Object value) {
@@ -995,17 +1003,17 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public List<MetadataValue> getMetadata(String key) {
+    public @NotNull List<MetadataValue> getMetadata(@NotNull String key) {
         return parent.getMetadata(key);
     }
 
     @Override
-    public boolean hasMetadata(String key) {
+    public boolean hasMetadata(@NotNull String key) {
         return parent.hasMetadata(key);
     }
 
     @Override
-    public void removeMetadata(final String key, final Plugin plugin) {
+    public void removeMetadata(final @NotNull String key, final @NotNull Plugin plugin) {
         TaskManager.IMP.sync(new RunnableVal<Object>() {
             @Override
             public void run(Object value) {
@@ -1015,12 +1023,12 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public void sendPluginMessage(Plugin source, String channel, byte[] message) {
+    public void sendPluginMessage(@NotNull Plugin source, @NotNull String channel, byte[] message) {
         parent.sendPluginMessage(source, channel, message);
     }
 
     @Override
-    public Set<String> getListeningPluginChannels() {
+    public @NotNull Set<String> getListeningPluginChannels() {
         return parent.getListeningPluginChannels();
     }
 
@@ -1029,17 +1037,17 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public Collection<Entity> getNearbyEntities(BoundingBox arg0) {
+    public @NotNull Collection<Entity> getNearbyEntities(@NotNull BoundingBox arg0) {
         return parent.getNearbyEntities(arg0);
     }
 
     @Override
-    public Collection<Entity> getNearbyEntities(BoundingBox arg0, Predicate<Entity> arg1) {
+    public @NotNull Collection<Entity> getNearbyEntities(@NotNull BoundingBox arg0, Predicate<Entity> arg1) {
         return parent.getNearbyEntities(arg0, arg1);
     }
 
     @Override
-    public Collection<Entity> getNearbyEntities(Location arg0, double arg1, double arg2, double arg3,
+    public @NotNull Collection<Entity> getNearbyEntities(@NotNull Location arg0, double arg1, double arg2, double arg3,
             Predicate<Entity> arg4) {
         return parent.getNearbyEntities(arg0, arg1, arg2, arg3, arg4);
     }
@@ -1050,7 +1058,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public Location locateNearestStructure(Location arg0, StructureType arg1, int arg2, boolean arg3) {
+    public Location locateNearestStructure(@NotNull Location arg0, @NotNull StructureType arg1, int arg2, boolean arg3) {
         return parent.locateNearestStructure(arg0, arg1, arg2, arg3);
     }
 
@@ -1075,44 +1083,45 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public RayTraceResult rayTrace(Location arg0, Vector arg1, double arg2, FluidCollisionMode arg3, boolean arg4,
+    public RayTraceResult rayTrace(
+        @NotNull Location arg0, @NotNull Vector arg1, double arg2, @NotNull FluidCollisionMode arg3, boolean arg4,
             double arg5, Predicate<Entity> arg6) {
         return parent.rayTrace(arg0, arg1, arg2, arg3, arg4, arg5, arg6);
     }
 
     @Override
-    public RayTraceResult rayTraceBlocks(Location arg0, Vector arg1, double arg2) {
+    public RayTraceResult rayTraceBlocks(@NotNull Location arg0, @NotNull Vector arg1, double arg2) {
         return parent.rayTraceBlocks(arg0, arg1, arg2);
     }
 
     @Override
-    public RayTraceResult rayTraceBlocks(Location start, Vector direction, double maxDistance, FluidCollisionMode fluidCollisionMode) {
+    public RayTraceResult rayTraceBlocks(@NotNull Location start, @NotNull Vector direction, double maxDistance, @NotNull FluidCollisionMode fluidCollisionMode) {
         return parent.rayTraceBlocks(start, direction, maxDistance, fluidCollisionMode);
     }
 
     @Override
-    public RayTraceResult rayTraceBlocks(Location start, Vector direction, double arg2, FluidCollisionMode fluidCollisionMode,
+    public RayTraceResult rayTraceBlocks(@NotNull Location start, @NotNull Vector direction, double arg2, @NotNull FluidCollisionMode fluidCollisionMode,
             boolean ignorePassableBlocks) {
         return parent.rayTraceBlocks(start, direction, arg2, fluidCollisionMode, ignorePassableBlocks);
     }
 
     @Override
-    public RayTraceResult rayTraceEntities(Location start, Vector direction, double maxDistance) {
+    public RayTraceResult rayTraceEntities(@NotNull Location start, @NotNull Vector direction, double maxDistance) {
         return parent.rayTraceEntities(start, direction, maxDistance);
     }
 
     @Override
-    public RayTraceResult rayTraceEntities(Location arg0, Vector arg1, double arg2, double arg3) {
+    public RayTraceResult rayTraceEntities(@NotNull Location arg0, @NotNull Vector arg1, double arg2, double arg3) {
         return parent.rayTraceEntities(arg0, arg1, arg2, arg3);
     }
 
     @Override
-    public RayTraceResult rayTraceEntities(Location arg0, Vector arg1, double arg2, Predicate<Entity> arg3) {
+    public RayTraceResult rayTraceEntities(@NotNull Location arg0, @NotNull Vector arg1, double arg2, Predicate<Entity> arg3) {
         return parent.rayTraceEntities(arg0, arg1, arg2, arg3);
     }
 
     @Override
-    public RayTraceResult rayTraceEntities(Location arg0, Vector arg1, double arg2, double arg3,
+    public RayTraceResult rayTraceEntities(@NotNull Location arg0, @NotNull Vector arg1, double arg2, double arg3,
             Predicate<Entity> arg4) {
         return parent.rayTraceEntities(arg0, arg1, arg2, arg3, arg4);
     }
@@ -1131,7 +1140,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public Collection<Chunk> getForceLoadedChunks() {
+    public @NotNull Collection<Chunk> getForceLoadedChunks() {
         return parent.getForceLoadedChunks();
     }
 
@@ -1161,7 +1170,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public int getHighestBlockYAt(int x, int z, com.destroystokyo.paper.HeightmapType heightmap) throws UnsupportedOperationException {
+    public int getHighestBlockYAt(int x, int z, com.destroystokyo.paper.@NotNull HeightmapType heightmap) throws UnsupportedOperationException {
         return TaskManager.IMP.sync(() -> parent.getHighestBlockYAt(x, z, heightmap));
     }
 
@@ -1191,7 +1200,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public CompletableFuture<Chunk> getChunkAtAsync(int arg0, int arg1, boolean arg2) {
+    public @NotNull CompletableFuture<Chunk> getChunkAtAsync(int arg0, int arg1, boolean arg2) {
         return parent.getChunkAtAsync(arg0, arg1, arg2);
     }
 
@@ -1206,22 +1215,22 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public void getChunkAtAsync(int x, int z, ChunkLoadCallback cb) {
+    public void getChunkAtAsync(int x, int z, @NotNull ChunkLoadCallback cb) {
         parent.getChunkAtAsync(x, z, cb);
     }
 
     @Override
-    public void getChunkAtAsync(Location location, ChunkLoadCallback cb) {
+    public void getChunkAtAsync(@NotNull Location location, @NotNull ChunkLoadCallback cb) {
         parent.getChunkAtAsync(location, cb);
     }
 
     @Override
-    public void getChunkAtAsync(Block block, ChunkLoadCallback cb) {
+    public void getChunkAtAsync(@NotNull Block block, @NotNull ChunkLoadCallback cb) {
         parent.getChunkAtAsync(block, cb);
     }
 
     @Override
-    public Entity getEntity(UUID uuid) {
+    public Entity getEntity(@NotNull UUID uuid) {
         return TaskManager.IMP.sync(() -> parent.getEntity(uuid));
     }
 
@@ -1232,7 +1241,7 @@ public class AsyncWorld extends PassthroughExtent implements World {
     }
 
     @Override
-    public boolean createExplosion(Entity source, Location loc, float power, boolean setFire, boolean breakBlocks) {
+    public boolean createExplosion(Entity source, @NotNull Location loc, float power, boolean setFire, boolean breakBlocks) {
         return TaskManager.IMP.sync(() -> parent.createExplosion(source, loc, power, setFire, breakBlocks));
     }
 
@@ -1250,12 +1259,13 @@ public class AsyncWorld extends PassthroughExtent implements World {
 
 
     @Override
-    public <T> void spawnParticle(Particle particle, List<Player> receivers, Player source, double x, double y, double z, int count, double offsetX, double offsetY, double offsetZ, double extra, T data) {
+    public <T> void spawnParticle(
+        @NotNull Particle particle, List<Player> receivers, @NotNull Player source, double x, double y, double z, int count, double offsetX, double offsetY, double offsetZ, double extra, T data) {
         parent.spawnParticle(particle, receivers, source, x, y, z, count, offsetX, offsetY, offsetZ, extra, data);
     }
 
     @Override
-    public <T> void spawnParticle(Particle particle, List<Player> list, Player player, double v, double v1, double v2, int i, double v3, double v4, double v5, double v6, T t, boolean b) {
+    public <T> void spawnParticle(@NotNull Particle particle, List<Player> list, Player player, double v, double v1, double v2, int i, double v3, double v4, double v5, double v6, T t, boolean b) {
         parent.spawnParticle(particle, list, player, v, v1, v2, i, v3, v4, v5, v6, t, b);
     }
 
@@ -1284,19 +1294,34 @@ public class AsyncWorld extends PassthroughExtent implements World {
         return parent.getHighestBlockAt(location, heightmap);
     }
 
+    @Override
     public long getTicksPerWaterSpawns() {
-        throw new UnsupportedOperationException();
+        return parent.getTicksPerWaterSpawns();
     }
 
+    @Override
     public void setTicksPerWaterSpawns(int ticksPerWaterSpawns) {
-        throw new UnsupportedOperationException();
+        parent.setTicksPerWaterSpawns(ticksPerWaterSpawns);
     }
 
+    @Override
+    public long getTicksPerWaterAmbientSpawns() {
+        return parent.getTicksPerWaterAmbientSpawns();
+    }
+
+    @Override
+    public void setTicksPerWaterAmbientSpawns(int ticksPerAmbientSpawns) {
+        parent.setTicksPerWaterAmbientSpawns(ticksPerAmbientSpawns);
+    }
+
+    @Override
     public long getTicksPerAmbientSpawns() {
-        throw new UnsupportedOperationException();
+        return parent.getTicksPerAmbientSpawns();
     }
 
+    @Override
     public void setTicksPerAmbientSpawns(int ticksPerAmbientSpawns) {
-        throw new UnsupportedOperationException();
+        parent.setTicksPerAmbientSpawns(ticksPerAmbientSpawns);
     }
+
 }

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/wrapper/state/AsyncDataContainer.java

@@ -3,15 +3,20 @@ package com.boydti.fawe.bukkit.wrapper.state;
 import com.boydti.fawe.FaweCache;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.Tag;
+
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
 import java.util.Objects;
+import java.util.Set;
+
 import org.apache.commons.lang.Validate;
 import org.bukkit.NamespacedKey;
 import org.bukkit.persistence.PersistentDataAdapterContext;
 import org.bukkit.persistence.PersistentDataContainer;
 import org.bukkit.persistence.PersistentDataType;
+import org.jetbrains.annotations.NotNull;
 
 public final class AsyncDataContainer implements PersistentDataContainer {
     private final CompoundTag root;
@@ -69,6 +74,20 @@ public final class AsyncDataContainer implements PersistentDataContainer {
         return z != null ? z : defaultValue;
     }
 
+    @NotNull
+    @Override
+    public Set<NamespacedKey> getKeys() {
+        Set<NamespacedKey> keys = new HashSet<>();
+        this.get(false).keySet().forEach(key -> {
+            String[] keyData = key.split(":", 2);
+            if (keyData.length == 2) {
+                keys.add(new NamespacedKey(keyData[0], keyData[1]));
+            }
+
+        });
+        return keys;
+    }
+
     public void remove(NamespacedKey key) {
         Validate.notNull(key, "The provided key for the custom value was null");
         get(false).remove(key.toString());

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitServerInterface.java

@@ -19,6 +19,7 @@
 
 package com.sk89q.worldedit.bukkit;
 
+import com.google.common.collect.Sets;
 import com.sk89q.bukkit.util.CommandInfo;
 import com.sk89q.bukkit.util.CommandRegistration;
 import com.sk89q.worldedit.LocalConfiguration;
@@ -30,6 +31,7 @@ import com.sk89q.worldedit.extension.platform.Capability;
 import com.sk89q.worldedit.extension.platform.MultiUserPlatform;
 import com.sk89q.worldedit.extension.platform.Preference;
 import com.sk89q.worldedit.extension.platform.Watchdog;
+import com.sk89q.worldedit.util.SideEffect;
 import com.sk89q.worldedit.util.concurrency.LazyReference;
 import com.sk89q.worldedit.world.DataFixer;
 import com.sk89q.worldedit.world.registry.Registries;
@@ -44,8 +46,8 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.EnumMap;
 import java.util.List;
-import java.util.Locale;
 import java.util.Map;
+import java.util.Set;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -218,6 +220,18 @@ public class BukkitServerInterface implements MultiUserPlatform {
         return capabilities;
     }
 
+    private static final Set<SideEffect> SUPPORTED_SIDE_EFFECTS = Sets.immutableEnumSet(
+            SideEffect.NEIGHBORS
+    );
+
+    @Override
+    public Set<SideEffect> getSupportedSideEffects() {
+        if (plugin.getBukkitImplAdapter() != null) {
+            return plugin.getBukkitImplAdapter().getSupportedSideEffects();
+        }
+        return SUPPORTED_SIDE_EFFECTS;
+    }
+
     public void unregisterCommands() {
         dynamicCommands.unregisterCommands();
     }

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -24,6 +24,8 @@ import static com.google.common.base.Preconditions.checkNotNull;
 import com.boydti.fawe.Fawe;
 import com.boydti.fawe.beta.IChunkGet;
 import com.boydti.fawe.beta.implementation.packet.ChunkPacket;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Sets;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.WorldEdit;
@@ -33,11 +35,14 @@ import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Player;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
 import com.sk89q.worldedit.math.BlockVector2;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Direction;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.util.TreeGenerator;
 import com.sk89q.worldedit.world.AbstractWorld;
 import com.sk89q.worldedit.world.biome.BiomeType;
@@ -48,15 +53,7 @@ import com.sk89q.worldedit.world.weather.WeatherTypes;
 import io.papermc.lib.PaperLib;
 import java.lang.ref.WeakReference;
 import java.nio.file.Path;
-import java.util.ArrayList;
-import java.util.EnumMap;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.Future;
-import java.util.function.Supplier;
+import java.util.*;
 import javax.annotation.Nullable;
 import org.bukkit.Effect;
 import org.bukkit.TreeType;
@@ -83,6 +80,7 @@ public class BukkitWorld extends AbstractWorld {
     }
 
     private final WeakReference<World> worldRef;
+    private final WorldNativeAccess<?, ?, ?> worldNativeAccess;
 
     /**
      * Construct the object.
@@ -91,6 +89,12 @@ public class BukkitWorld extends AbstractWorld {
      */
     public BukkitWorld(World world) {
         this.worldRef = new WeakReference<>(world);
+        BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
+        if (adapter != null) {
+            this.worldNativeAccess = adapter.createWorldNativeAccess(world);
+        } else {
+            this.worldNativeAccess = null;
+        }
     }
 
     @Override
@@ -479,26 +483,22 @@ public class BukkitWorld extends AbstractWorld {
     }
 
     @Override
-    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, boolean notifyAndLight) throws WorldEditException {
-        BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
-        if (adapter != null) {
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) {
+        if (worldNativeAccess != null) {
             try {
-                return adapter.setBlock(BukkitAdapter.adapt(getWorld(), position), block, notifyAndLight);
+                return worldNativeAccess.setBlock(position, block, sideEffects);
             } catch (Exception e) {
                 if (block instanceof BaseBlock && ((BaseBlock) block).getNbtData() != null) {
-                    logger.warn("Tried to set a corrupt tile entity at " + position.toString());
-                    logger.warn(((BaseBlock) block).getNbtData().toString());
+                    logger.warn("Tried to set a corrupt tile entity at " + position.toString() +
+                        ": " + ((BaseBlock) block).getNbtData(), e);
+                } else {
+                    logger.warn("Failed to set block via adapter, falling back to generic", e);
                 }
-                e.printStackTrace();
-                Block bukkitBlock = getWorld().getBlockAt(position.getBlockX(), position.getBlockY(), position.getBlockZ());
-                bukkitBlock.setBlockData(BukkitAdapter.adapt(block), notifyAndLight);
-                return true;
             }
-        } else {
-            Block bukkitBlock = getWorld().getBlockAt(position.getBlockX(), position.getBlockY(), position.getBlockZ());
-            bukkitBlock.setBlockData(BukkitAdapter.adapt(block), false);
-            return true;
         }
+        Block bukkitBlock = getWorld().getBlockAt(position.getBlockX(), position.getBlockY(), position.getBlockZ());
+        bukkitBlock.setBlockData(BukkitAdapter.adapt(block), sideEffects.doesApplyAny());
+        return true;
     }
 
     @Override
@@ -512,14 +512,17 @@ public class BukkitWorld extends AbstractWorld {
     }
 
     @Override
-    public boolean notifyAndLightBlock(BlockVector3 position, com.sk89q.worldedit.world.block.BlockState previousType) throws WorldEditException {
-        BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
-        if (adapter != null) {
-            adapter.notifyAndLightBlock(BukkitAdapter.adapt(getWorld(), position), previousType);
-            return true;
+    public Set<SideEffect> applySideEffects(BlockVector3 position, com.sk89q.worldedit.world.block.BlockState previousType,
+            SideEffectSet sideEffectSet) {
+        if (worldNativeAccess != null) {
+            worldNativeAccess.applySideEffects(position, previousType, sideEffectSet);
+            return Sets.intersection(
+                    WorldEditPlugin.getInstance().getInternalPlatform().getSupportedSideEffects(),
+                    sideEffectSet.getSideEffectsToApply()
+            );
         }
 
-        return false;
+        return ImmutableSet.of();
     }
 
     @Override

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/WorldEditPlugin.java

@@ -33,8 +33,8 @@ import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.bukkit.adapter.AdapterLoadException;
 import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
 import com.sk89q.worldedit.bukkit.adapter.BukkitImplLoader;
-import com.sk89q.worldedit.bukkit.adapter.impl.FAWE_Spigot_v1_15_R1;
 import com.sk89q.worldedit.bukkit.adapter.impl.FAWE_Spigot_v1_15_R2;
+import com.sk89q.worldedit.bukkit.adapter.impl.FAWE_Spigot_v1_16_R1;
 import com.sk89q.worldedit.event.platform.CommandEvent;
 import com.sk89q.worldedit.event.platform.CommandSuggestionEvent;
 import com.sk89q.worldedit.event.platform.PlatformReadyEvent;
@@ -371,8 +371,8 @@ public class WorldEditPlugin extends JavaPlugin { //implements TabCompleter
         BukkitImplLoader adapterLoader = new BukkitImplLoader();
         try {
             adapterLoader.addClass(FAWE_Spigot_v1_14_R4.class);
-            adapterLoader.addClass(FAWE_Spigot_v1_15_R1.class);
             adapterLoader.addClass(FAWE_Spigot_v1_15_R2.class);
+            adapterLoader.addClass(FAWE_Spigot_v1_16_R1.class);
         } catch (Throwable throwable) {
             throwable.printStackTrace();
         }

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplAdapter.java

@@ -30,19 +30,21 @@ import com.sk89q.worldedit.blocks.BaseItem;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.bukkit.BukkitAdapter;
 import com.sk89q.worldedit.entity.BaseEntity;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.registry.state.Property;
 import com.sk89q.worldedit.util.Direction;
+import com.sk89q.worldedit.util.SideEffect;
 import com.sk89q.worldedit.world.DataFixer;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockState;
-import com.sk89q.worldedit.world.block.BlockStateHolder;
 import com.sk89q.worldedit.world.block.BlockType;
 import com.sk89q.worldedit.world.registry.BlockMaterial;
 import java.util.Map;
 import java.util.OptionalInt;
+import java.util.Set;
 import javax.annotation.Nullable;
 import org.bukkit.Location;
 import org.bukkit.World;
@@ -95,23 +97,12 @@ public interface BukkitImplAdapter<T> extends IBukkitAdapter {
     BaseBlock getBlock(Location location);
 
     /**
-     * Set the block at the given location.
+     * Create a {@link WorldNativeAccess} for the given world reference.
      *
-     * @param location the location
-     * @param state the block
-     * @param notifyAndLight notify and light if set
-     * @return true if a block was likely changed
+     * @param world the world reference
+     * @return the native access object
      */
-    <B extends BlockStateHolder<B>> boolean setBlock(Location location, B state, boolean notifyAndLight);
-
-    /**
-     * Notifies the simulation that the block at the given location has
-     * been changed and it must be re-lighted (and issue other events).
-     *
-     * @param position position of the block
-     * @param previousType the type of the previous block that was there
-     */
-    void notifyAndLightBlock(Location position, BlockState previousType);
+    WorldNativeAccess<?, ?, ?> createWorldNativeAccess(World world);
 
     /**
      * Get the state for the given entity.
@@ -186,6 +177,13 @@ public interface BukkitImplAdapter<T> extends IBukkitAdapter {
      */
     BaseItemStack adapt(ItemStack itemStack);
 
+    /**
+     * Get the {@link SideEffect}s that this adapter supports.
+     *
+     * @return The side effects that are supported
+     */
+    Set<SideEffect> getSupportedSideEffects();
+
     default OptionalInt getInternalBlockStateId(BlockData data) {
         // return OptionalInt.empty();
         return getInternalBlockStateId(BukkitAdapter.adapt(data));

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplLoader.java

@@ -155,11 +155,20 @@ public class BukkitImplLoader {
      */
     public BukkitImplAdapter loadAdapter() throws AdapterLoadException {
         for (String className : adapterCandidates) {
+            System.out.println("Candidate: " + className);
             try {
                 Class<?> cls = Class.forName(className);
-                if (cls.isSynthetic()) continue;
+                if (cls.isSynthetic()){
+                    System.out.println(className + " is synthetic, continuing");
+                    continue;
+                }else{
+                    System.out.println(className + " is not synthetic");
+                }
                 if (BukkitImplAdapter.class.isAssignableFrom(cls)) {
+                    System.out.println(className + " is assignable from BukkitImplAdapter, returning");
                     return (BukkitImplAdapter) cls.newInstance();
+                }else{
+                    System.out.println(className + " is NOT assignable from BukkitImplAdapter, returning");
                 }
             } catch (ClassNotFoundException e) {
                 log.warn("Failed to load the Bukkit adapter class '" + className +
@@ -170,6 +179,8 @@ public class BukkitImplLoader {
             } catch (Throwable e) {
                 if (className.equals(customCandidate)) {
                     log.warn("Failed to load the Bukkit adapter class '" + className + "'", e);
+                }else{
+                    log.warn(className + " is not custom candidate.", e);
                 }
             }
         }

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/IDelegateBukkitImplAdapter.java

@@ -12,6 +12,7 @@ import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.registry.state.Property;
 import com.sk89q.worldedit.util.Direction;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.world.DataFixer;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BaseBlock;
@@ -65,15 +66,6 @@ public interface IDelegateBukkitImplAdapter<T> extends BukkitImplAdapter<T> {
         return getParent().getBlock(location);
     }
 
-    default <B extends BlockStateHolder<B>> boolean setBlock(Location location, B state, boolean notifyAndLight) {
-        return getParent().setBlock(location, state, notifyAndLight);
-    }
-
-    @Override
-    default void notifyAndLightBlock(Location position, BlockState previousType) {
-        getParent().notifyAndLightBlock(position, previousType);
-    }
-
     @Override
     @Nullable
     default BaseEntity getEntity(Entity entity) {

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/FAWE_Spigot_v1_14_R4.java

@@ -24,10 +24,7 @@ import com.boydti.fawe.FaweCache;
 import com.boydti.fawe.beta.IChunkGet;
 import com.boydti.fawe.beta.implementation.packet.ChunkPacket;
 import com.boydti.fawe.beta.implementation.queue.SingleThreadQueueExtent;
-import com.boydti.fawe.bukkit.adapter.mc1_14.BlockMaterial_1_14;
-import com.boydti.fawe.bukkit.adapter.mc1_14.BukkitAdapter_1_14;
-import com.boydti.fawe.bukkit.adapter.mc1_14.BukkitGetBlocks_1_14;
-import com.boydti.fawe.bukkit.adapter.mc1_14.MapChunkUtil_1_14;
+import com.boydti.fawe.bukkit.adapter.mc1_14.*;
 import com.boydti.fawe.bukkit.adapter.mc1_14.nbt.LazyCompoundTag_1_14;
 import com.google.common.io.Files;
 import com.sk89q.jnbt.CompoundTag;
@@ -42,11 +39,13 @@ import com.sk89q.worldedit.bukkit.adapter.CachedBukkitAdapter;
 import com.sk89q.worldedit.bukkit.adapter.IDelegateBukkitImplAdapter;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.LazyBaseEntity;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.registry.state.Property;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.world.biome.BiomeType;
-import com.sk89q.worldedit.world.biome.BiomeTypes;
 import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.*;
 import com.sk89q.worldedit.world.entity.EntityType;
@@ -69,8 +68,10 @@ import org.bukkit.generator.ChunkGenerator;
 import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
+import java.lang.ref.WeakReference;
 import java.util.Map;
 import java.util.OptionalInt;
+import java.util.Set;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
 import java.util.function.Supplier;
@@ -149,8 +150,8 @@ public final class FAWE_Spigot_v1_14_R4 extends CachedBukkitAdapter implements I
     }
 
     @Override
-    public <B extends BlockStateHolder<B>> boolean setBlock(Location location, B state, boolean notifyAndLight) {
-        return this.setBlock(location.getChunk(), location.getBlockX(), location.getBlockY(), location.getBlockZ(), state, notifyAndLight);
+    public Set<SideEffect> getSupportedSideEffects() {
+        return SideEffectSet.defaults().getSideEffectsToApply();
     }
 
     public boolean setBlock(org.bukkit.Chunk chunk, int x, int y, int z, BlockStateHolder state, boolean update) {
@@ -204,6 +205,12 @@ public final class FAWE_Spigot_v1_14_R4 extends CachedBukkitAdapter implements I
         return true;
     }
 
+    @Override
+    public WorldNativeAccess<?, ?, ?> createWorldNativeAccess(org.bukkit.World world) {
+        return new FAWEWorldNativeAccess_1_14(this,
+                new WeakReference<>(((CraftWorld) world).getHandle()));
+    }
+
     @Nullable
     private static String getEntityId(Entity entity) {
         MinecraftKey minecraftkey = EntityTypes.getName(entity.getEntityType());
@@ -292,11 +299,6 @@ public final class FAWE_Spigot_v1_14_R4 extends CachedBukkitAdapter implements I
         return material.getCraftBlockData();
     }
 
-    @Override
-    public void notifyAndLightBlock(Location position, BlockState previousType) {
-        this.setBlock(position.getChunk(), position.getBlockX(), position.getBlockY(), position.getBlockZ(), previousType, true);
-    }
-
     private MapChunkUtil_1_14 mapUtil = new MapChunkUtil_1_14();
 
     @Override

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/FAWE_Spigot_v1_15_R2.java

@@ -26,10 +26,7 @@ import com.boydti.fawe.beta.IQueueChunk;
 import com.boydti.fawe.beta.IQueueExtent;
 import com.boydti.fawe.beta.implementation.packet.ChunkPacket;
 import com.boydti.fawe.beta.implementation.queue.SingleThreadQueueExtent;
-import com.boydti.fawe.bukkit.adapter.mc1_15_2.BlockMaterial_1_15_2;
-import com.boydti.fawe.bukkit.adapter.mc1_15_2.BukkitAdapter_1_15_2;
-import com.boydti.fawe.bukkit.adapter.mc1_15_2.BukkitGetBlocks_1_15_2;
-import com.boydti.fawe.bukkit.adapter.mc1_15_2.MapChunkUtil_1_15_2;
+import com.boydti.fawe.bukkit.adapter.mc1_15_2.*;
 import com.boydti.fawe.bukkit.adapter.mc1_15_2.nbt.LazyCompoundTag_1_15_2;
 import com.google.common.io.Files;
 import com.sk89q.jnbt.CompoundTag;
@@ -44,9 +41,12 @@ import com.sk89q.worldedit.bukkit.adapter.CachedBukkitAdapter;
 import com.sk89q.worldedit.bukkit.adapter.IDelegateBukkitImplAdapter;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.LazyBaseEntity;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.registry.state.Property;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.biome.BiomeTypes;
 import com.sk89q.worldedit.world.block.BlockState;
@@ -71,8 +71,10 @@ import org.bukkit.generator.ChunkGenerator;
 import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
+import java.lang.ref.WeakReference;
 import java.util.Map;
 import java.util.OptionalInt;
+import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
@@ -158,11 +160,11 @@ public final class FAWE_Spigot_v1_15_R2 extends CachedBukkitAdapter implements I
     }
 
     @Override
-    public <B extends BlockStateHolder<B>> boolean setBlock(Location location, B state, boolean notifyAndLight) {
-        return this.setBlock(location.getChunk(), location.getBlockX(), location.getBlockY(), location.getBlockZ(), state, notifyAndLight);
+    public Set<SideEffect> getSupportedSideEffects() {
+        return SideEffectSet.defaults().getSideEffectsToApply();
     }
 
-    public <B extends BlockStateHolder<B>> boolean setBlock(org.bukkit.Chunk chunk, int x, int y, int z, B state, boolean update) {
+    public boolean setBlock(org.bukkit.Chunk chunk, int x, int y, int z, BlockStateHolder state, boolean update) {
         CraftChunk craftChunk = (CraftChunk) chunk;
         Chunk nmsChunk = craftChunk.getHandle();
         World nmsWorld = nmsChunk.getWorld();
@@ -213,6 +215,12 @@ public final class FAWE_Spigot_v1_15_R2 extends CachedBukkitAdapter implements I
         return true;
     }
 
+    @Override
+    public WorldNativeAccess<?, ?, ?> createWorldNativeAccess(org.bukkit.World world) {
+        return new FAWEWorldNativeAccess_1_15_2(this,
+                new WeakReference<>(((CraftWorld) world).getHandle()));
+    }
+
     @Nullable
     private static String getEntityId(Entity entity) {
         MinecraftKey minecraftkey = EntityTypes.getName(entity.getEntityType());
@@ -301,11 +309,6 @@ public final class FAWE_Spigot_v1_15_R2 extends CachedBukkitAdapter implements I
         return material.getCraftBlockData();
     }
 
-    @Override
-    public void notifyAndLightBlock(Location position, BlockState previousType) {
-        this.setBlock(position.getChunk(), position.getBlockX(), position.getBlockY(), position.getBlockZ(), previousType, true);
-    }
-
     private MapChunkUtil_1_15_2 mapUtil = new MapChunkUtil_1_15_2();
 
     @Override

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/FAWE_Spigot_v1_16_R1.java

@@ -26,11 +26,8 @@ import com.boydti.fawe.beta.IQueueChunk;
 import com.boydti.fawe.beta.IQueueExtent;
 import com.boydti.fawe.beta.implementation.packet.ChunkPacket;
 import com.boydti.fawe.beta.implementation.queue.SingleThreadQueueExtent;
-import com.boydti.fawe.bukkit.adapter.mc1_15.BlockMaterial_1_15;
-import com.boydti.fawe.bukkit.adapter.mc1_15.BukkitAdapter_1_15;
-import com.boydti.fawe.bukkit.adapter.mc1_15.BukkitGetBlocks_1_15;
-import com.boydti.fawe.bukkit.adapter.mc1_15.MapChunkUtil_1_15;
-import com.boydti.fawe.bukkit.adapter.mc1_15.nbt.LazyCompoundTag_1_15;
+import com.boydti.fawe.bukkit.adapter.mc1_16_1.*;
+import com.boydti.fawe.bukkit.adapter.mc1_16_1.nbt.LazyCompoundTag_1_16_1;
 import com.google.common.io.Files;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.Tag;
@@ -44,35 +41,39 @@ import com.sk89q.worldedit.bukkit.adapter.CachedBukkitAdapter;
 import com.sk89q.worldedit.bukkit.adapter.IDelegateBukkitImplAdapter;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.LazyBaseEntity;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.registry.state.Property;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.world.biome.BiomeType;
-import com.sk89q.worldedit.world.biome.BiomeTypes;
 import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.*;
 import com.sk89q.worldedit.world.entity.EntityType;
 import com.sk89q.worldedit.world.registry.BlockMaterial;
-import net.minecraft.server.v1_15_R1.*;
+import net.minecraft.server.v1_16_R1.*;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.World.Environment;
 import org.bukkit.block.data.BlockData;
-import org.bukkit.craftbukkit.v1_15_R1.CraftChunk;
-import org.bukkit.craftbukkit.v1_15_R1.CraftWorld;
-import org.bukkit.craftbukkit.v1_15_R1.block.CraftBlock;
-import org.bukkit.craftbukkit.v1_15_R1.block.data.CraftBlockData;
-import org.bukkit.craftbukkit.v1_15_R1.entity.CraftEntity;
-import org.bukkit.craftbukkit.v1_15_R1.entity.CraftPlayer;
-import org.bukkit.craftbukkit.v1_15_R1.inventory.CraftItemStack;
+import org.bukkit.craftbukkit.v1_16_R1.CraftChunk;
+import org.bukkit.craftbukkit.v1_16_R1.CraftWorld;
+import org.bukkit.craftbukkit.v1_16_R1.block.CraftBlock;
+import org.bukkit.craftbukkit.v1_16_R1.block.data.CraftBlockData;
+import org.bukkit.craftbukkit.v1_16_R1.entity.CraftEntity;
+import org.bukkit.craftbukkit.v1_16_R1.entity.CraftPlayer;
+import org.bukkit.craftbukkit.v1_16_R1.inventory.CraftItemStack;
 import org.bukkit.entity.Player;
 import org.bukkit.generator.ChunkGenerator;
 
 import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
+import java.lang.ref.WeakReference;
 import java.util.Map;
 import java.util.OptionalInt;
+import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
@@ -81,16 +82,16 @@ import java.util.stream.Stream;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
-public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements IDelegateBukkitImplAdapter<NBTBase> {
-    private final Spigot_v1_15_R1 parent;
+public final class FAWE_Spigot_v1_16_R1 extends CachedBukkitAdapter implements IDelegateBukkitImplAdapter<NBTBase> {
+    private final Spigot_v1_16_R1 parent;
     private char[] ibdToStateOrdinal;
 
     // ------------------------------------------------------------------------
     // Code that may break between versions of Minecraft
     // ------------------------------------------------------------------------
 
-    public FAWE_Spigot_v1_15_R1() throws NoSuchFieldException, NoSuchMethodException {
-        this.parent = new Spigot_v1_15_R1();
+    public FAWE_Spigot_v1_16_R1() throws NoSuchFieldException, NoSuchMethodException {
+        this.parent = new Spigot_v1_16_R1();
     }
 
     @Override
@@ -99,11 +100,11 @@ public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements I
     }
 
     private synchronized boolean init() {
-        if (ibdToStateOrdinal != null) return false;
+        if (ibdToStateOrdinal != null && ibdToStateOrdinal[1] != 0) return false;
         ibdToStateOrdinal = new char[Block.REGISTRY_ID.a()]; // size
         for (int i = 0; i < ibdToStateOrdinal.length; i++) {
             BlockState state = BlockTypesCache.states[i];
-            BlockMaterial_1_15 material = (BlockMaterial_1_15) state.getMaterial();
+            BlockMaterial_1_16_1 material = (BlockMaterial_1_16_1) state.getMaterial();
             int id = Block.REGISTRY_ID.getId(material.getState());
             ibdToStateOrdinal[id] = state.getOrdinalChar();
         }
@@ -113,13 +114,15 @@ public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements I
     @Override
     public BlockMaterial getMaterial(BlockType blockType) {
         Block block = getBlock(blockType);
-        return new BlockMaterial_1_15(block);
+        return new BlockMaterial_1_16_1(block);
     }
 
     @Override
     public BlockMaterial getMaterial(BlockState state) {
         IBlockData bs = ((CraftBlockData) Bukkit.createBlockData(state.getAsString())).getState();
-        return new BlockMaterial_1_15(bs.getBlock(), bs);
+        return new BlockMaterial_1_16_1(bs.getBlock(), bs);
+
+
     }
 
     public Block getBlock(BlockType blockType) {
@@ -156,24 +159,24 @@ public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements I
     }
 
     @Override
-    public <B extends BlockStateHolder<B>> boolean setBlock(Location location, B state, boolean notifyAndLight) {
-        return this.setBlock(location.getChunk(), location.getBlockX(), location.getBlockY(), location.getBlockZ(), state, notifyAndLight);
+    public Set<SideEffect> getSupportedSideEffects() {
+        return SideEffectSet.defaults().getSideEffectsToApply();
     }
 
-    public <B extends BlockStateHolder<B>> boolean setBlock(org.bukkit.Chunk chunk, int x, int y, int z, B state, boolean update) {
+    public boolean setBlock(org.bukkit.Chunk chunk, int x, int y, int z, BlockStateHolder state, boolean update) {
         CraftChunk craftChunk = (CraftChunk) chunk;
         Chunk nmsChunk = craftChunk.getHandle();
         World nmsWorld = nmsChunk.getWorld();
 
         BlockPosition blockPos = new BlockPosition(x, y, z);
-        IBlockData blockData = ((BlockMaterial_1_15) state.getMaterial()).getState();
+        IBlockData blockData = ((BlockMaterial_1_16_1) state.getMaterial()).getState();
         ChunkSection[] sections = nmsChunk.getSections();
         int y4 = y >> 4;
         ChunkSection section = sections[y4];
 
         IBlockData existing;
         if (section == null) {
-            existing = ((BlockMaterial_1_15) BlockTypes.AIR.getDefaultState().getMaterial()).getState();
+            existing = ((BlockMaterial_1_16_1) BlockTypes.AIR.getDefaultState().getMaterial()).getState();
         } else {
             existing = section.getType(x & 15, y & 15, z & 15);
         }
@@ -194,7 +197,7 @@ public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements I
                     tag.set("x", NBTTagInt.a(x));
                     tag.set("y", NBTTagInt.a(y));
                     tag.set("z", NBTTagInt.a(z));
-                    tileEntity.load(tag); // readTagIntoTileEntity - load data
+                    tileEntity.load(tileEntity.getBlock(), tag); // readTagIntoTileEntity - load data
                 }
             }
         } else {
@@ -211,6 +214,12 @@ public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements I
         return true;
     }
 
+    @Override
+    public WorldNativeAccess<?, ?, ?> createWorldNativeAccess(org.bukkit.World world) {
+        return new FAWEWorldNativeAccess_1_16(this,
+                new WeakReference<>(((CraftWorld)world).getHandle()));
+    }
+
     @Nullable
     private static String getEntityId(Entity entity) {
         MinecraftKey minecraftkey = EntityTypes.getName(entity.getEntityType());
@@ -245,7 +254,7 @@ public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements I
 
     @Override
     public OptionalInt getInternalBlockStateId(BlockState state) {
-        BlockMaterial_1_15 material = (BlockMaterial_1_15) state.getMaterial();
+        BlockMaterial_1_16_1 material = (BlockMaterial_1_16_1) state.getMaterial();
         IBlockData mcState = material.getCraftBlockData().getState();
         return OptionalInt.of(Block.REGISTRY_ID.getId(mcState));
     }
@@ -286,7 +295,7 @@ public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements I
             } catch (NullPointerException e) {
                 init();
                 return adaptToChar(ibd);
-            } catch (ArrayIndexOutOfBoundsException e1) {
+            } catch(ArrayIndexOutOfBoundsException e1){
                 Fawe.debug("Attempted to convert " + ibd.getBlock() + " with ID " + Block.REGISTRY_ID.getId(ibd) + " to char. ibdToStateOrdinal length: " + ibdToStateOrdinal.length + ". Defaulting to air!");
                 return 0;
             }
@@ -295,21 +304,16 @@ public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements I
 
     @Override
     public <B extends BlockStateHolder<B>> BlockData adapt(B state) {
-        BlockMaterial_1_15 material = (BlockMaterial_1_15) state.getMaterial();
+        BlockMaterial_1_16_1 material = (BlockMaterial_1_16_1) state.getMaterial();
         return material.getCraftBlockData();
     }
 
-    @Override
-    public void notifyAndLightBlock(Location position, BlockState previousType) {
-        this.setBlock(position.getChunk(), position.getBlockX(), position.getBlockY(), position.getBlockZ(), previousType, true);
-    }
-
-    private MapChunkUtil_1_15 mapUtil = new MapChunkUtil_1_15();
+    private MapChunkUtil_1_16_1 mapUtil = new MapChunkUtil_1_16_1();
 
     @Override
     public void sendFakeChunk(org.bukkit.World world, Player player, ChunkPacket packet) {
         WorldServer nmsWorld = ((CraftWorld) world).getHandle();
-        PlayerChunk map = BukkitAdapter_1_15.getPlayerChunk(nmsWorld, packet.getChunkX(), packet.getChunkZ());
+        PlayerChunk map = BukkitAdapter_1_16_1.getPlayerChunk(nmsWorld, packet.getChunkX(), packet.getChunkZ());
         if (map != null && map.hasBeenLoaded()) {
             boolean flag = false;
             PlayerChunk.d players = map.players;
@@ -362,91 +366,93 @@ public final class FAWE_Spigot_v1_15_R1 extends CachedBukkitAdapter implements I
 
     @Override
     public NBTBase fromNative(Tag foreign) {
-        if (foreign instanceof LazyCompoundTag_1_15) {
-            return ((LazyCompoundTag_1_15) foreign).get();
+        if (foreign instanceof LazyCompoundTag_1_16_1) {
+            return ((LazyCompoundTag_1_16_1) foreign).get();
         }
         return parent.fromNative(foreign);
     }
 
     @Override
     public boolean regenerate(org.bukkit.World world, Region region, EditSession editSession) {
-        WorldServer originalWorld = ((CraftWorld) world).getHandle();
-        ChunkProviderServer provider = originalWorld.getChunkProvider();
-        if (!(provider instanceof ChunkProviderServer)) {
-            return false;
-        }
+//        WorldServer originalWorld = ((CraftWorld) world).getHandle();
+//        ChunkProviderServer provider = originalWorld.getChunkProvider();
+//        if (!(provider instanceof ChunkProviderServer)) {
+//            return false;
+//        }
+//
+//        File saveFolder = Files.createTempDir();
+//        // register this just in case something goes wrong
+//        // normally it should be deleted at the end of this method
+//        saveFolder.deleteOnExit();
+//        try {
+//            MinecraftServer server = originalWorld.getServer().getServer();
+//            Convertable.ConversionSession originalDataManager = server.convertable;
+////            Convertable.ConversionSession saveHandler = new Convertable.ConversionSession(world.getName(), world.);
+//            WorldData newWorldData = new WorldData(originalWorld.worldData.a((NBTTagCompound) null),
+//                    server.dataConverterManager, getDataVersion(), null);
+//            newWorldData.setName(UUID.randomUUID().toString());
+//
+//            ChunkGenerator gen = world.getGenerator();
+//            Environment env = world.getEnvironment();
+//            try (WorldServer freshWorld = new WorldServer(server,
+//                    server.executorService, originalDataManager,
+//                    newWorldData,
+//                    originalWorld.worldProvider.getDimensionManager(),
+//                    originalWorld.getMethodProfiler(),
+//                    server.worldLoadListenerFactory.create(11),
+//                    env,
+//                    gen){
+//                @Override
+//                public boolean addEntityChunk(Entity entity) {
+//                    //Fixes #320; Prevent adding entities so we aren't attempting to spawn them asynchronously
+//                    return false;
+//                }
+//            }) {
+//
+//                // Pre-gen all the chunks
+//                // We need to also pull one more chunk in every direction
+//                Fawe.get().getQueueHandler().startSet(true);
+//                try {
+//                    IQueueExtent<IQueueChunk> extent = new SingleThreadQueueExtent();
+//                    extent.init(null, (x, z) -> new BukkitGetBlocks_1_16_1(freshWorld, x, z) {
+//                        @Override
+//                        public Chunk ensureLoaded(World nmsWorld, int X, int Z) {
+//                            Chunk cached = nmsWorld.getChunkIfLoaded(X, Z);
+//                            if (cached != null) return cached;
+//                            Future<Chunk> future = Fawe.get().getQueueHandler().sync((Supplier<Chunk>) () -> freshWorld.getChunkAt(X, Z));
+//                            while (!future.isDone()) {
+//                                // this feels so dirty
+//                                freshWorld.getChunkProvider().runTasks();
+//                            }
+//                            try {
+//                                return future.get();
+//                            } catch (InterruptedException | ExecutionException e) {
+//                                throw new RuntimeException(e);
+//                            }
+//                        }
+//                    }, null);
+//                    for (BlockVector3 vec : region) {
+//                        editSession.setBlock(vec, extent.getFullBlock(vec));
+//                    }
+//                } finally {
+//                    Fawe.get().getQueueHandler().endSet(true);
+//                }
+//            } catch (IOException e) {
+//                throw new RuntimeException(e);
+//            }
+//        } catch (MaxChangedBlocksException e) {
+//            throw new RuntimeException(e);
+//        } finally {
+//            saveFolder.delete();
+//        }
+//        return true;
 
-        File saveFolder = Files.createTempDir();
-        // register this just in case something goes wrong
-        // normally it should be deleted at the end of this method
-        saveFolder.deleteOnExit();
-        try {
-            MinecraftServer server = originalWorld.getServer().getServer();
-            WorldNBTStorage originalDataManager = originalWorld.getDataManager();
-            WorldNBTStorage saveHandler = new WorldNBTStorage(saveFolder, originalDataManager.getDirectory().getName(), server, originalDataManager.getDataFixer());
-            WorldData newWorldData = new WorldData(originalWorld.worldData.a((NBTTagCompound) null),
-                    server.dataConverterManager, getDataVersion(), null);
-            newWorldData.setName(UUID.randomUUID().toString());
-
-            ChunkGenerator gen = world.getGenerator();
-            Environment env = world.getEnvironment();
-            try (WorldServer freshWorld = new WorldServer(server,
-                    server.executorService, saveHandler,
-                    newWorldData,
-                    originalWorld.worldProvider.getDimensionManager(),
-                    originalWorld.getMethodProfiler(),
-                    server.worldLoadListenerFactory.create(11),
-                    env,
-                    gen){
-                @Override
-                public boolean addEntityChunk(net.minecraft.server.v1_15_R1.Entity entity) {
-                    //Fixes #320; Prevent adding entities so we aren't attempting to spawn them asynchronously
-                    return false;
-                }
-            }) {
-
-                // Pre-gen all the chunks
-                // We need to also pull one more chunk in every direction
-                Fawe.get().getQueueHandler().startSet(true);
-                try {
-                    IQueueExtent<IQueueChunk> extent = new SingleThreadQueueExtent();
-                    extent.init(null, (x, z) -> new BukkitGetBlocks_1_15(freshWorld, x, z) {
-                        @Override
-                        public Chunk ensureLoaded(World nmsWorld, int X, int Z) {
-                            Chunk cached = nmsWorld.getChunkIfLoaded(X, Z);
-                            if (cached != null) return cached;
-                            Future<Chunk> future = Fawe.get().getQueueHandler().sync((Supplier<Chunk>) () -> freshWorld.getChunkAt(X, Z));
-                            while (!future.isDone()) {
-                                // this feels so dirty
-                                freshWorld.getChunkProvider().runTasks();
-                            }
-                            try {
-                                return future.get();
-                            } catch (InterruptedException | ExecutionException e) {
-                                throw new RuntimeException(e);
-                            }
-                        }
-                    }, null);
-                    for (BlockVector3 vec : region) {
-                        editSession.setBlock(vec, extent.getFullBlock(vec));
-                    }
-                } finally {
-                    Fawe.get().getQueueHandler().endSet(true);
-                }
-            } catch (IOException e) {
-                throw new RuntimeException(e);
-            }
-        } catch (MaxChangedBlocksException e) {
-            throw new RuntimeException(e);
-        } finally {
-            saveFolder.delete();
-        }
-        return true;
+        return false; //TODO: rework or remove for 1.16
     }
 
     @Override
     public IChunkGet get(org.bukkit.World world, int chunkX, int chunkZ) {
-        return new BukkitGetBlocks_1_15(world, chunkX, chunkZ);
+        return new BukkitGetBlocks_1_16_1(world, chunkX, chunkZ);
     }
 
     @Override

worldedit-cli/src/main/java/com/sk89q/worldedit/cli/CLIPlatform.java

@@ -19,10 +19,12 @@
 
 package com.sk89q.worldedit.cli;
 
+import com.google.common.collect.ImmutableSet;
 import com.sk89q.worldedit.entity.Player;
 import com.sk89q.worldedit.extension.platform.AbstractPlatform;
 import com.sk89q.worldedit.extension.platform.Capability;
 import com.sk89q.worldedit.extension.platform.Preference;
+import com.sk89q.worldedit.util.SideEffect;
 import com.sk89q.worldedit.world.DataFixer;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.entity.EntityTypes;
@@ -33,6 +35,7 @@ import java.util.ArrayList;
 import java.util.EnumMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.Timer;
 import java.util.TimerTask;
 
@@ -153,6 +156,11 @@ class CLIPlatform extends AbstractPlatform {
         return capabilities;
     }
 
+    @Override
+    public Set<SideEffect> getSupportedSideEffects() {
+        return ImmutableSet.of();
+    }
+
     public void addWorld(World world) {
         worlds.add(world);
     }

worldedit-cli/src/main/java/com/sk89q/worldedit/cli/schematic/ClipboardWorld.java

@@ -19,6 +19,7 @@
 
 package com.sk89q.worldedit.cli.schematic;
 
+import com.google.common.collect.ImmutableSet;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.WorldEditException;
@@ -34,6 +35,8 @@ import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.util.TreeGenerator;
 import com.sk89q.worldedit.world.AbstractWorld;
 import com.sk89q.worldedit.world.biome.BiomeType;
@@ -46,6 +49,7 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.List;
 import java.util.Locale;
+import java.util.Set;
 
 import javax.annotation.Nullable;
 
@@ -74,15 +78,14 @@ public class ClipboardWorld extends AbstractWorld implements Clipboard, CLIWorld
     }
 
     @Override
-    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, boolean notifyAndLight)
-            throws WorldEditException {
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
         dirty = true;
         return clipboard.setBlock(position, block);
     }
 
     @Override
-    public boolean notifyAndLightBlock(BlockVector3 position, BlockState previousType) throws WorldEditException {
-        return false;
+    public Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet) throws WorldEditException {
+        return ImmutableSet.of();
     }
 
     @Override

worldedit-core/src/main/java/com/boydti/fawe/Fawe.java

@@ -305,7 +305,7 @@ public class Fawe {
             br.close();
             this.version = FaweVersion.tryParse(versionString, commitString, dateString);
             Settings.IMP.DATE = new Date(100 + version.year, version.month, version.day).toGMTString();
-            Settings.IMP.BUILD = "https://ci.athion.net/job/FastAsyncWorldEdit-1.15/" + version.build;
+            Settings.IMP.BUILD = "https://ci.athion.net/job/FastAsyncWorldEdit-1.16/" + version.build;
             Settings.IMP.COMMIT = "https://github.com/IntellectualSites/FastAsyncWorldEdit/commit/" + Integer.toHexString(version.hash);
         } catch (Throwable ignore) {}
         try {

worldedit-core/src/main/java/com/boydti/fawe/FaweCache.java

@@ -1,7 +1,6 @@
 package com.boydti.fawe;
 
 import static com.google.common.base.Preconditions.checkNotNull;
-import static org.slf4j.LoggerFactory.getLogger;
 
 import com.boydti.fawe.beta.IChunkSet;
 import com.boydti.fawe.beta.Trimable;
@@ -9,6 +8,7 @@ import com.boydti.fawe.beta.implementation.queue.Pool;
 import com.boydti.fawe.beta.implementation.queue.QueuePool;
 import com.boydti.fawe.config.Settings;
 import com.boydti.fawe.object.collection.BitArray;
+import com.boydti.fawe.object.collection.BitArrayUnstretched;
 import com.boydti.fawe.object.collection.CleanableThreadLocal;
 import com.boydti.fawe.object.collection.VariableThreadLocal;
 import com.boydti.fawe.object.exception.FaweBlockBagException;
@@ -299,6 +299,102 @@ public enum FaweCache implements Trimable {
         }
     }
 
+    /**
+     * Convert raw int array to unstretched palette (1.16)
+     * @param layerOffset
+     * @param blocks
+     * @return palette
+     */
+    public Palette toPaletteUnstretched(int layerOffset, char[] blocks) {
+        return toPaletteUnstretched(layerOffset, null, blocks);
+    }
+
+    /**
+     * Convert raw int array to unstretched palette (1.16)
+     * @param layerOffset
+     * @param blocks
+     * @return palette
+     */
+    public Palette toPaletteUnstretched(int layerOffset, int[] blocks) {
+        return toPaletteUnstretched(layerOffset, blocks, null);
+    }
+
+    private Palette toPaletteUnstretched(int layerOffset, int[] blocksInts, char[] blocksChars) {
+        int[] blockToPalette = BLOCK_TO_PALETTE.get();
+        int[] paletteToBlock = PALETTE_TO_BLOCK.get();
+        long[] blockStates = BLOCK_STATES.get();
+        int[] blocksCopy = SECTION_BLOCKS.get();
+
+        try {
+            int num_palette = 0;
+            int blockIndexStart = layerOffset << 12;
+            int blockIndexEnd = blockIndexStart + 4096;
+            if (blocksChars != null) {
+                for (int i = blockIndexStart, j = 0; i < blockIndexEnd; i++, j++) {
+                    int ordinal = blocksChars[i];
+                    int palette = blockToPalette[ordinal];
+                    if (palette == Integer.MAX_VALUE) {
+                        blockToPalette[ordinal] = palette = num_palette;
+                        paletteToBlock[num_palette] = ordinal;
+                        num_palette++;
+                    }
+                    blocksCopy[j] = palette;
+                }
+            } else if (blocksInts != null) {
+                for (int i = blockIndexStart, j = 0; i < blockIndexEnd; i++, j++) {
+                    int ordinal = blocksInts[i];
+                    int palette = blockToPalette[ordinal];
+                    if (palette == Integer.MAX_VALUE) {
+                        //                        BlockState state = BlockTypesCache.states[ordinal];
+                        blockToPalette[ordinal] = palette = num_palette;
+                        paletteToBlock[num_palette] = ordinal;
+                        num_palette++;
+                    }
+                    blocksCopy[j] = palette;
+                }
+            } else {
+                throw new IllegalArgumentException();
+            }
+
+            for (int i = 0; i < num_palette; i++) {
+                blockToPalette[paletteToBlock[i]] = Integer.MAX_VALUE;
+            }
+
+            // BlockStates
+            int bitsPerEntry = MathMan.log2nlz(num_palette - 1);
+            if (Settings.IMP.PROTOCOL_SUPPORT_FIX || num_palette != 1) {
+                bitsPerEntry = Math.max(bitsPerEntry, 4); // Protocol support breaks <4 bits per entry
+            } else {
+                bitsPerEntry = Math.max(bitsPerEntry, 1); // For some reason minecraft needs 4096 bits to store 0 entries
+            }
+            int blocksPerLong = MathMan.floorZero((double) 64 / bitsPerEntry);
+            int blockBitArrayEnd = MathMan.ceilZero((float) 4096 / blocksPerLong);
+            if (num_palette == 1) {
+                // Set a value, because minecraft needs it for some  reason
+                blockStates[0] = 0;
+                blockBitArrayEnd = 1;
+            } else {
+                BitArrayUnstretched bitArray = new BitArrayUnstretched(bitsPerEntry, blockStates);
+                bitArray.fromRaw(blocksCopy);
+            }
+
+            // Construct palette
+            Palette palette = PALETTE_CACHE.get();
+            palette.bitsPerEntry = bitsPerEntry;
+            palette.paletteToBlockLength = num_palette;
+            palette.paletteToBlock = paletteToBlock;
+
+            palette.blockStatesLength = blockBitArrayEnd;
+            palette.blockStates = blockStates;
+
+            return palette;
+        } catch (Throwable e) {
+            e.printStackTrace();
+            Arrays.fill(blockToPalette, Integer.MAX_VALUE);
+            throw e;
+        }
+    }
+
     /*
      * Vector cache
      */

worldedit-core/src/main/java/com/boydti/fawe/FaweVersion.java

@@ -32,9 +32,9 @@ public class FaweVersion {
 
     @Override public String toString() {
         if (hash == 0 && build == 0) {
-            return "FastAsyncWorldEdit-1.15-NoVer-SNAPSHOT";
+            return "FastAsyncWorldEdit-1.16-NoVer-SNAPSHOT";
         } else {
-            return "FastAsyncWorldEdit-1.15" + build;
+            return "FastAsyncWorldEdit-1.16" + build;
         }
     }
 

worldedit-core/src/main/java/com/boydti/fawe/IFawe.java

@@ -41,4 +41,8 @@ public interface IFawe {
 
     Preloader getPreloader();
 
+    default boolean isChunksStretched() {
+        return true;
+    }
+
 }

worldedit-core/src/main/java/com/boydti/fawe/beta/IBlocks.java

@@ -45,11 +45,11 @@ public interface IBlocks extends Trimable {
 
     IBlocks reset();
 
-    default byte[] toByteArray(boolean full) {
-        return toByteArray(null, getBitMask(), full);
+    default byte[] toByteArray(boolean full, boolean stretched) {
+        return toByteArray(null, getBitMask(), full, stretched);
     }
 
-    default byte[] toByteArray(byte[] buffer, int bitMask, boolean full) {
+    default byte[] toByteArray(byte[] buffer, int bitMask, boolean full, boolean stretched) {
         if (buffer == null) {
             buffer = new byte[1024];
         }
@@ -81,7 +81,12 @@ public interface IBlocks extends Trimable {
                 }
 
                 sectionWriter.writeShort(nonEmpty); // non empty
-                FaweCache.Palette palette = FaweCache.IMP.toPalette(0, ids);
+                FaweCache.Palette palette;
+                if (stretched) {
+                     palette = FaweCache.IMP.toPalette(0, ids);
+                } else {
+                    palette = FaweCache.IMP.toPaletteUnstretched(0, ids);
+                }
 
                 sectionWriter.writeByte(palette.bitsPerEntry); // bits per block
                 sectionWriter.writeVarInt(palette.paletteToBlockLength);

worldedit-core/src/main/java/com/boydti/fawe/beta/implementation/blocks/CharSetBlocks.java

@@ -181,6 +181,18 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
     }
 
     @Override public void setFullBright(int layer) {
+        if (light == null) {
+            light = new char[16][];
+        }
+        if (light[layer] == null) {
+            light[layer] = new char[4096];
+        }
+        if (skyLight == null) {
+            skyLight = new char[16][];
+        }
+        if (skyLight[layer] == null) {
+            skyLight[layer] = new char[4096];
+        }
         Arrays.fill(light[layer], (char) 15);
         Arrays.fill(skyLight[layer], (char) 15);
     }

worldedit-core/src/main/java/com/boydti/fawe/beta/implementation/packet/ChunkPacket.java

@@ -1,10 +1,12 @@
 package com.boydti.fawe.beta.implementation.packet;
 
+import com.boydti.fawe.Fawe;
 import com.boydti.fawe.FaweCache;
 import com.boydti.fawe.beta.IBlocks;
 import com.boydti.fawe.object.FaweOutputStream;
 import com.boydti.fawe.object.io.FastByteArrayOutputStream;
 import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.worldedit.WorldEdit;
 
 import java.util.HashMap;
 import java.util.function.Function;
@@ -64,7 +66,7 @@ public class ChunkPacket implements Function<byte[], byte[]>, Supplier<byte[]> {
                 if (sectionBytes == null) {
                     IBlocks tmpChunk = getChunk();
                     byte[] buf = FaweCache.IMP.BYTE_BUFFER_8192.get();
-                    sectionBytes = tmpChunk.toByteArray(buf, tmpChunk.getBitMask(), this.full);
+                    sectionBytes = tmpChunk.toByteArray(buf, tmpChunk.getBitMask(), this.full, Fawe.imp().isChunksStretched());
                 }
                 tmp = sectionBytes;
             }
@@ -72,6 +74,7 @@ public class ChunkPacket implements Function<byte[], byte[]>, Supplier<byte[]> {
         return tmp;
     }
 
+
     public Object getNativePacket() {
         return nativePacket;
     }

worldedit-core/src/main/java/com/boydti/fawe/jnbt/anvil/MCAWorld.java

@@ -13,12 +13,16 @@ import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.regions.Region;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.util.TreeGenerator;
 import com.sk89q.worldedit.world.AbstractWorld;
 import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
 
 import javax.annotation.Nullable;
 import java.io.File;
+import java.util.Set;
 
 import static com.google.common.base.Preconditions.checkArgument;
 
@@ -35,6 +39,11 @@ public class MCAWorld extends AbstractWorld {
         return path.getName();
     }
 
+    @Override
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
+        return false;
+    }
+
 
     @Override
     public boolean setTile(int x, int y, int z, CompoundTag tile) throws WorldEditException {
@@ -46,6 +55,11 @@ public class MCAWorld extends AbstractWorld {
         return false;
     }
 
+    @Override
+    public Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet) throws WorldEditException {
+        return SideEffectSet.none().getSideEffectsToApply();
+    }
+
     @Override
     public boolean clearContainerBlockContents(BlockVector3 position) {
         return false;

worldedit-core/src/main/java/com/boydti/fawe/object/brush/CopyPastaBrush.java

@@ -31,7 +31,8 @@ public class CopyPastaBrush implements Brush, ResettableTool {
 
     private final LocalSession session;
     private final Player player;
-    public boolean autoRotate, randomRotate;
+    public boolean autoRotate;
+    public boolean randomRotate;
 
     public CopyPastaBrush(Player player, LocalSession session, boolean randomRotate, boolean autoRotate) {
         session.setClipboard(null);

worldedit-core/src/main/java/com/boydti/fawe/object/brush/visualization/cfi/HeightMapMCAGenerator.java

@@ -29,10 +29,7 @@ import com.boydti.fawe.util.TextureUtil;
 import com.boydti.fawe.util.image.Drawable;
 import com.boydti.fawe.util.image.ImageViewer;
 import com.sk89q.jnbt.CompoundTag;
-import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.LocalSession;
-import com.sk89q.worldedit.MaxChangedBlocksException;
-import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.*;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.entity.Player;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
@@ -48,9 +45,7 @@ import com.sk89q.worldedit.math.transform.Transform;
 import com.sk89q.worldedit.regions.CuboidRegion;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.session.ClipboardHolder;
-import com.sk89q.worldedit.util.Identifiable;
-import com.sk89q.worldedit.util.Location;
-import com.sk89q.worldedit.util.TreeGenerator;
+import com.sk89q.worldedit.util.*;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.biome.BiomeTypes;
@@ -68,6 +63,7 @@ import java.lang.reflect.Field;
 import java.nio.file.Path;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.ThreadLocalRandom;
 import java.util.function.Supplier;
@@ -750,12 +746,24 @@ public class HeightMapMCAGenerator extends MCAWriter implements StreamChange, Dr
         return BlockVector3.at(getWidth() - 1, 255, getLength() - 1);
     }
 
+    @Override
+    public Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet)
+        throws WorldEditException{
+        return SideEffectSet.none().getSideEffectsToApply();
+    }
+
     @Override
     public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block)
         throws WorldEditException {
         return setBlock(position.getBlockX(), position.getBlockY(), position.getBlockZ(), block);
     }
 
+    @Override
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects)
+        throws WorldEditException {
+        return setBlock(position.getBlockX(), position.getBlockY(), position.getBlockZ(), block);
+    }
+
     private boolean setBlock(int x, int y, int z, char combined) {
         int index = z * getWidth() + x;
         if (index < 0 || index >= getArea()) {

worldedit-core/src/main/java/com/boydti/fawe/object/collection/BitArrayUnstretched.java

@@ -0,0 +1,115 @@
+package com.boydti.fawe.object.collection;
+
+import com.boydti.fawe.util.MathMan;
+
+public final class BitArrayUnstretched {
+
+    private final long[] data;
+    private final int bitsPerEntry;
+    private final int maxSeqLocIndex;
+    private final int emptyBitCount;
+    private final long mask;
+    private final int longLen;
+
+    public BitArrayUnstretched(int bitsPerEntry, long[] buffer) {
+        this.bitsPerEntry = bitsPerEntry;
+        this.mask = (1L << bitsPerEntry) - 1L;
+        this.emptyBitCount = 64 % bitsPerEntry;
+        this.maxSeqLocIndex = 64 - (bitsPerEntry + emptyBitCount);
+        final int blocksPerLong = MathMan.floorZero((double) 64 / bitsPerEntry);
+        this.longLen = MathMan.ceilZero((float) 4096 / blocksPerLong);
+        if (buffer.length < longLen) {
+            this.data = new long[longLen];
+        } else {
+            this.data = buffer;
+        }
+    }
+
+    public long[] getData() {
+        return data;
+    }
+
+    public final void set(int index, int value) {
+        if (longLen == 0) return;
+        int bitIndexStart = index * bitsPerEntry + MathMan.floorZero((double) index / longLen) * emptyBitCount;
+        int longIndexStart = bitIndexStart >> 6;
+        int localBitIndexStart = bitIndexStart & 63;
+        this.data[longIndexStart] = this.data[longIndexStart] & ~(mask << localBitIndexStart) | (long) value << localBitIndexStart;
+    }
+
+    public final int get(int index) {
+        if (longLen == 0) return 0;
+        int bitIndexStart = index * bitsPerEntry + MathMan.floorZero((double) index / longLen) * emptyBitCount;
+
+        int longIndexStart = bitIndexStart >> 6;
+
+        int localBitIndexStart = bitIndexStart & 63;
+        return (int)(this.data[longIndexStart] >>> localBitIndexStart & mask);
+    }
+
+    public int getLength() {
+        return longLen;
+    }
+    
+    public final void fromRaw(int[] arr) {
+        final long[] data = this.data;
+        final int bitsPerEntry = this.bitsPerEntry;
+        final int maxSeqLocIndex = this.maxSeqLocIndex;
+
+        int localStart = 0;
+        int arrI = 0;
+        long l = 0;
+        for (int i = 0; i < longLen; i++) {
+            int lastVal;
+            for (; localStart <= maxSeqLocIndex && arrI < 4096; localStart += bitsPerEntry) {
+                lastVal = arr[arrI++];
+                l |= ((long) lastVal << localStart);
+            }
+            localStart = 0;
+            data[i] = l;
+            l = 0;
+        }
+    }
+
+    public final int[] toRaw() {
+        return toRaw(new int[4096]);
+    }
+
+    public final int[] toRaw(int[] buffer) {
+        final long[] data = this.data;
+        final int bitsPerEntry = this.bitsPerEntry;
+        final int maxSeqLocIndex = this.maxSeqLocIndex;
+
+        int localStart = 0;
+        int arrI = 0;
+        for (int i = 0; i < longLen; i++) {
+            long l = data[i];
+            char lastVal;
+            for (; localStart <= maxSeqLocIndex && arrI < 4096; localStart += bitsPerEntry) {
+                lastVal = (char) (l >>> localStart & this.mask);
+                buffer[arrI++] = lastVal;
+            }
+            localStart = 0;
+        }
+        return buffer;
+    }
+
+    public final char[] toRaw(char[] buffer) {
+        final long[] data = this.data;
+        final int bitsPerEntry = this.bitsPerEntry;
+        final int maxSeqLocIndex = this.maxSeqLocIndex;
+
+        int localStart = 0;
+        int arrI = 0;
+        for (int i = 0; i < longLen; i++) {
+            long l = data[i];
+            char lastVal;
+            for (; localStart <= maxSeqLocIndex && arrI < 4096; localStart += bitsPerEntry) {
+                lastVal = (char) (l >>> localStart & this.mask);
+                buffer[arrI++] = lastVal;
+            }
+            localStart = 0;
+        }
+        return buffer;
+    }
+}

worldedit-core/src/main/java/com/boydti/fawe/wrappers/WorldWrapper.java

@@ -24,9 +24,7 @@ import com.sk89q.worldedit.math.BlockVector2;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.regions.Region;
-import com.sk89q.worldedit.util.Direction;
-import com.sk89q.worldedit.util.Location;
-import com.sk89q.worldedit.util.TreeGenerator;
+import com.sk89q.worldedit.util.*;
 import com.sk89q.worldedit.world.AbstractWorld;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.biome.BiomeType;
@@ -38,6 +36,7 @@ import com.sk89q.worldedit.world.weather.WeatherType;
 
 import javax.annotation.Nullable;
 import java.util.List;
+import java.util.Set;
 
 public class WorldWrapper extends AbstractWorld {
 
@@ -88,6 +87,12 @@ public class WorldWrapper extends AbstractWorld {
         return parent.useItem(position, item, face);
     }
 
+    @Override
+    public Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet)
+            throws WorldEditException{
+        return parent.applySideEffects(position, previousType, sideEffectSet);
+    }
+
     @Override
     public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, boolean notifyAndLight) throws WorldEditException {
         return parent.setBlock(position, block, notifyAndLight);
@@ -99,6 +104,11 @@ public class WorldWrapper extends AbstractWorld {
         return parent.setBlock(x, y, z, block);
     }
 
+    @Override
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
+        return parent.setBlock(position, block, sideEffects);
+    }
+
     @Override
     public boolean setTile(int x, int y, int z, CompoundTag tile) throws WorldEditException {
         return parent.setTile(x, y, z, tile);

worldedit-core/src/main/java/com/sk89q/util/StringUtil.java

@@ -20,6 +20,7 @@
 package com.sk89q.util;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
 import java.util.Locale;
@@ -331,4 +332,37 @@ public final class StringUtil {
 
         return parsableBlocks;
     }
+
+    /**
+     * Splits a string respecting enclosing quotes.
+     *
+     * @param input the input to split.
+     * @param delimiter the delimiter to split on.
+     * @param open the opening quote character.
+     * @param close the closing quote character.
+     * @return a list of split strings.
+     */
+    public static List<String> split(String input, char delimiter, char open, char close) {
+        if (input.indexOf(open) == -1 && input.indexOf(close) == -1) {
+            return Arrays.asList(input.split(String.valueOf(delimiter)));
+        }
+        int level = 0;
+        int begin = 0;
+        List<String> split = new ArrayList<>();
+        for (int i = 0; i < input.length(); i++) {
+            char c = input.charAt(i);
+            if (c == delimiter && level == 0) {
+                split.add(input.substring(begin, i));
+                begin = i + 1;
+            } else if (c == open) {
+                level++;
+            } else if (c == close) {
+                level--;
+            }
+        }
+        if (begin < input.length()) {
+            split.add(input.substring(begin));
+        }
+        return split;
+    }
 }

worldedit-core/src/main/java/com/sk89q/worldedit/EditSession.java

@@ -119,7 +119,7 @@ import com.sk89q.worldedit.regions.shape.RegionShape;
 import com.sk89q.worldedit.regions.shape.WorldEditExpressionEnvironment;
 import com.sk89q.worldedit.util.Countable;
 import com.sk89q.worldedit.util.Direction;
-import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.util.TreeGenerator;
 import com.sk89q.worldedit.util.eventbus.EventBus;
 import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
@@ -575,6 +575,20 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
         disableHistory(enabled);
     }
 
+    /**
+     * Set which block updates should occur.
+     *
+     * @param sideEffectSet side effects to enable
+     */
+    public void setSideEffectApplier(SideEffectSet sideEffectSet) {
+        //Do nothing; TODO: SideEffects currently not fully implemented in FAWE.
+    }
+
+    public SideEffectSet getSideEffectApplier() {
+        //Do nothing; TODO: SideEffects currently not fully implemented in FAWE.
+        return SideEffectSet.defaults();
+    }
+
     /**
      * Disable history (or re-enable)
      *

worldedit-core/src/main/java/com/sk89q/worldedit/LocalSession.java

@@ -72,6 +72,7 @@ import com.sk89q.worldedit.session.ClipboardHolder;
 import com.sk89q.worldedit.util.Countable;
 import com.sk89q.worldedit.util.HandSide;
 import com.sk89q.worldedit.util.Identifiable;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockState;
@@ -145,7 +146,7 @@ public class LocalSession implements TextureHolder {
     private transient Snapshot snapshotExperimental;
     private transient boolean hasCUISupport = false;
     private transient int cuiVersion = -1;
-    private transient boolean fastMode = false;
+    private transient SideEffectSet sideEffectSet = SideEffectSet.defaults();
     private transient Mask mask;
     private transient Mask sourceMask;
     private transient TextureUtil texture;
@@ -1494,7 +1495,7 @@ public class LocalSession implements TextureHolder {
             builder.blockBag(blockBag);
         }
         builder.command(command);
-        builder.fastmode(fastMode);
+        builder.fastmode(!this.sideEffectSet.doesApplyAny());
 
         editSession = builder.build();
 
@@ -1513,7 +1514,7 @@ public class LocalSession implements TextureHolder {
     }
 
     private void prepareEditingExtents(EditSession editSession, Actor actor) {
-        editSession.setFastMode(fastMode);
+        editSession.setSideEffectApplier(sideEffectSet);
         editSession.setReorderMode(reorderMode);
         if (editSession.getSurvivalExtent() != null) {
             editSession.getSurvivalExtent().setStripNbt(!actor.hasPermission("worldedit.setnbt"));
@@ -1521,13 +1522,32 @@ public class LocalSession implements TextureHolder {
         editSession.setTickingWatchdog(tickingWatchdog);
     }
 
+    /**
+     * Gets the side effect applier of this session.
+     *
+     * @return the side effect applier
+     */
+    public SideEffectSet getSideEffectSet() {
+        return this.sideEffectSet;
+    }
+
+    /**
+     * Sets the side effect applier for this session
+     *
+     * @param sideEffectSet the side effect applier
+     */
+    public void setSideEffectSet(SideEffectSet sideEffectSet) {
+        this.sideEffectSet = sideEffectSet;
+    }
+
     /**
      * Checks if the session has fast mode enabled.
      *
      * @return true if fast mode is enabled
      */
+    @Deprecated
     public boolean hasFastMode() {
-        return fastMode;
+        return !this.sideEffectSet.doesApplyAny();
     }
 
     /**
@@ -1535,8 +1555,9 @@ public class LocalSession implements TextureHolder {
      *
      * @param fastMode true if fast mode is enabled
      */
+    @Deprecated
     public void setFastMode(boolean fastMode) {
-        this.fastMode = fastMode;
+        this.sideEffectSet = fastMode ? SideEffectSet.none() : SideEffectSet.defaults();
     }
 
     /**

worldedit-core/src/main/java/com/sk89q/worldedit/command/GeneralCommands.java

@@ -49,10 +49,13 @@ import java.util.ArrayList;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
 import com.sk89q.worldedit.extension.platform.Capability;
 import com.sk89q.worldedit.function.mask.Mask;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.util.formatting.component.PaginationBox;
+import com.sk89q.worldedit.util.formatting.component.SideEffectBox;
+import com.sk89q.worldedit.util.formatting.text.Component;
 import com.sk89q.worldedit.util.formatting.text.TextComponent;
 import com.sk89q.worldedit.util.formatting.text.format.TextColor;
-import com.sk89q.worldedit.util.formatting.text.Component;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.item.ItemType;
 import java.io.FileNotFoundException;
@@ -142,24 +145,62 @@ public class GeneralCommands {
 
     @Command(
         name = "/fast",
-        desc = "Toggle fast mode"
+        desc = "Toggle fast mode side effects"
     )
     @CommandPermissions("worldedit.fast")
     public void fast(Actor actor, LocalSession session,
-                     @Arg(desc = "The new fast mode state", def = "")
-                        Boolean fastMode) {
-        boolean hasFastMode = session.hasFastMode();
-        if (fastMode != null && fastMode == hasFastMode) {
-            actor.printError(TranslatableComponent.of(fastMode ? "worldedit.fast.enabled.already" : "worldedit.fast.disabled.already"));
-            return;
+                    @Arg(desc = "The side effect", def = "")
+                        SideEffect sideEffect,
+                    @Arg(desc = "The new side effect state", def = "")
+                        SideEffect.State newState,
+                    @Switch(name = 'h', desc = "Show the info box")
+                        boolean showInfoBox) throws WorldEditException {
+        if (sideEffect != null) {
+            SideEffect.State currentState = session.getSideEffectSet().getState(sideEffect);
+            if (newState != null && newState == currentState) {
+                if (!showInfoBox) {
+                    actor.printError(TranslatableComponent.of(
+                            "worldedit.fast.sideeffect.already-set",
+                            TranslatableComponent.of(sideEffect.getDisplayName()),
+                            TranslatableComponent.of(newState.getDisplayName())
+                    ));
+                }
+                return;
+            }
+
+            if (newState != null) {
+                session.setSideEffectSet(session.getSideEffectSet().with(sideEffect, newState));
+                if (!showInfoBox) {
+                    actor.printInfo(TranslatableComponent.of(
+                            "worldedit.fast.sideeffect.set",
+                            TranslatableComponent.of(sideEffect.getDisplayName()),
+                            TranslatableComponent.of(newState.getDisplayName())
+                    ));
+                }
+            } else {
+                actor.printInfo(TranslatableComponent.of(
+                        "worldedit.fast.sideeffect.get",
+                        TranslatableComponent.of(sideEffect.getDisplayName()),
+                        TranslatableComponent.of(currentState.getDisplayName())
+                ));
+            }
+        } else if (newState != null) {
+            SideEffectSet applier = session.getSideEffectSet();
+            for (SideEffect sideEffectEntry : SideEffect.values()) {
+                applier = applier.with(sideEffectEntry, newState);
+            }
+            session.setSideEffectSet(applier);
+            if (!showInfoBox) {
+                actor.printInfo(TranslatableComponent.of(
+                        "worldedit.fast.sideeffect.set-all",
+                        TranslatableComponent.of(newState.getDisplayName())
+                ));
+            }
         }
 
-        if (hasFastMode) {
-            session.setFastMode(false);
-            actor.printInfo(TranslatableComponent.of("worldedit.fast.disabled"));
-        } else {
-            session.setFastMode(true);
-            actor.printInfo(TranslatableComponent.of("worldedit.fast.enabled"));
+        if (sideEffect == null || showInfoBox) {
+            SideEffectBox sideEffectBox = new SideEffectBox(session.getSideEffectSet());
+            actor.print(sideEffectBox.create(1));
         }
     }
 

worldedit-core/src/main/java/com/sk89q/worldedit/command/argument/EnumConverter.java

@@ -23,6 +23,7 @@ import com.boydti.fawe.object.brush.scroll.Scroll;
 import com.google.common.collect.ImmutableSet;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.command.util.HookMode;
+import com.sk89q.worldedit.util.SideEffect;
 import com.sk89q.worldedit.util.TreeGenerator;
 import org.enginehub.piston.CommandManager;
 import org.enginehub.piston.converter.ArgumentConverter;
@@ -30,6 +31,7 @@ import org.enginehub.piston.converter.MultiKeyConverter;
 import org.enginehub.piston.inject.Key;
 
 import javax.annotation.Nullable;
+
 import java.util.EnumSet;
 import java.util.Locale;
 import java.util.Set;
@@ -48,6 +50,11 @@ public final class EnumConverter {
             full(EditSession.ReorderMode.class,
                 r -> ImmutableSet.of(r.getDisplayName()),
                 null));
+        commandManager.registerConverter(Key.of(SideEffect.State.class),
+                MultiKeyConverter.from(
+                    EnumSet.of(SideEffect.State.OFF, SideEffect.State.ON),
+                    r -> ImmutableSet.of(r.name().toLowerCase(Locale.US)),
+                    null));
         commandManager.registerConverter(Key.of(HookMode.class),
             basic(HookMode.class));
         commandManager.registerConverter(Key.of(Scroll.Action.class),

worldedit-core/src/main/java/com/sk89q/worldedit/command/argument/SideEffectConverter.java

@@ -0,0 +1,75 @@
+/*
+ * 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.command.argument;
+
+import static org.enginehub.piston.converter.SuggestionHelper.limitByPrefix;
+
+import com.google.common.collect.ImmutableList;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.command.util.EntityRemover;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.formatting.text.Component;
+import com.sk89q.worldedit.util.formatting.text.TextComponent;
+import org.enginehub.piston.CommandManager;
+import org.enginehub.piston.converter.ArgumentConverter;
+import org.enginehub.piston.converter.ConversionResult;
+import org.enginehub.piston.converter.FailedConversion;
+import org.enginehub.piston.converter.SuccessfulConversion;
+import org.enginehub.piston.inject.InjectedValueAccess;
+import org.enginehub.piston.inject.Key;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Locale;
+
+public class SideEffectConverter implements ArgumentConverter<SideEffect> {
+
+    public static void register(CommandManager commandManager) {
+        commandManager.registerConverter(Key.of(SideEffect.class), new SideEffectConverter());
+    }
+
+    private final TextComponent choices = TextComponent.of("any side effect");
+
+    private SideEffectConverter() {
+    }
+
+    private Collection<SideEffect> getSideEffects() {
+        return WorldEdit.getInstance().getPlatformManager().getSupportedSideEffects();
+    }
+
+    @Override
+    public Component describeAcceptableArguments() {
+        return choices;
+    }
+
+    @Override
+    public List<String> getSuggestions(String input, InjectedValueAccess context) {
+        return limitByPrefix(getSideEffects().stream().map(sideEffect -> sideEffect.name().toLowerCase(Locale.US)), input);
+    }
+
+    @Override
+    public ConversionResult<SideEffect> convert(String argument, InjectedValueAccess context) {
+        try {
+            return SuccessfulConversion.fromSingle(SideEffect.valueOf(argument.toUpperCase(Locale.US)));
+        } catch (Exception e) {
+            return FailedConversion.from(e);
+        }
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/BlockFactory.java

@@ -58,8 +58,8 @@ public class BlockFactory extends AbstractFactory<BaseBlock> {
      */
     public Set<BaseBlock> parseFromListInput(String input, ParserContext context) throws InputParseException {
         Set<BaseBlock> blocks = new HashSet<>();
-        String[] splits = input.split(",");
-        for (String token : StringUtil.parseListInQuotes(splits, ',', '[', ']', true)) {
+        // String[] splits = input.split(",");
+        for (String token : StringUtil.split(input, ',', '[', ']')) {
             blocks.add(parseFromInput(token, context));
         }
         return blocks;

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/PatternFactory.java

@@ -24,6 +24,7 @@ import com.sk89q.worldedit.extension.factory.parser.pattern.BlockCategoryPattern
 import com.sk89q.worldedit.extension.factory.parser.pattern.ClipboardPatternParser;
 import com.sk89q.worldedit.extension.factory.parser.pattern.RandomPatternParser;
 import com.sk89q.worldedit.extension.factory.parser.pattern.RandomStatePatternParser;
+import com.sk89q.worldedit.extension.factory.parser.pattern.SimplexPatternParser;
 import com.sk89q.worldedit.extension.factory.parser.pattern.SingleBlockPatternParser;
 import com.sk89q.worldedit.extension.factory.parser.pattern.TypeOrStateApplyingPatternParser;
 import com.sk89q.worldedit.function.pattern.Pattern;
@@ -54,6 +55,9 @@ public final class PatternFactory extends AbstractFactory<Pattern> {
         register(new TypeOrStateApplyingPatternParser(worldEdit));
         register(new RandomStatePatternParser(worldEdit));
         register(new BlockCategoryPatternParser(worldEdit));
+
+        // FAWE
+        register(new SimplexPatternParser(worldEdit));
     }
 
 }

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/parser/RichParser.java

@@ -0,0 +1,118 @@
+package com.sk89q.worldedit.extension.factory.parser;
+
+import com.sk89q.util.StringUtil;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.extension.input.InputParseException;
+import com.sk89q.worldedit.extension.input.ParserContext;
+import com.sk89q.worldedit.internal.registry.InputParser;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.StringJoiner;
+import java.util.stream.Stream;
+
+/**
+ * A rich parser allows parsing of patterns and masks with extra arguments,
+ * e.g. #simplex[scale][pattern].
+ *
+ * @param <E> the parse result.
+ */
+public abstract class RichParser<E> extends InputParser<E> {
+    private final String prefix;
+    private final String required;
+
+    /**
+     * Create a new rich parser with a defined prefix for the result, e.g. {@code #simplex}.
+     *
+     * @param worldEdit the worldedit instance.
+     * @param prefix    the prefix of this parser result.
+     */
+    protected RichParser(WorldEdit worldEdit, String prefix) {
+        super(worldEdit);
+        this.prefix = prefix;
+        this.required = prefix + "[";
+    }
+
+    @Override
+    public Stream<String> getSuggestions(String input) {
+        // we don't even want to start suggesting if it's not meant to be this parser result
+        if (input.length() > this.required.length() && !input.startsWith(this.required)) {
+            return Stream.empty();
+        }
+        // suggest until the first [ as long as it isn't fully typed
+        if (input.length() < this.required.length()) {
+            return Stream.of(this.required).filter(s -> s.startsWith(input));
+        }
+        // we know that it is at least "<required>"
+        String[] strings = extractArguments(input.substring(this.prefix.length()), false);
+        StringJoiner joiner = new StringJoiner(",");
+        for (int i = 0; i < strings.length - 1; i++) {
+            joiner.add("[" + strings[i] + "]");
+        }
+        String previous = this.prefix + joiner;
+        return getSuggestions(strings[strings.length - 1], strings.length - 1).map(s -> previous + "[" + s + "]");
+    }
+
+    @Override
+    public E parseFromInput(String input, ParserContext context) throws InputParseException {
+        if (!input.startsWith(this.prefix)) return null;
+        if (input.length() < this.prefix.length()) return null;
+        String[] arguments = extractArguments(input.substring(prefix.length()), true);
+        return parseFromInput(arguments, context);
+    }
+
+    /**
+     * Returns a stream of suggestions for the argument at the given index.
+     *
+     * @param argumentInput the already provided input for the argument at the given index.
+     * @param index         the index of the argument to get suggestions for.
+     * @return a stream of suggestions matching the given input for the argument at the given index.
+     */
+    protected abstract Stream<String> getSuggestions(String argumentInput, int index);
+
+    /**
+     * Parses the already split arguments.
+     *
+     * @param arguments the array of arguments that were split (can be empty).
+     * @param context   the context of this parsing process.
+     * @return the resulting parsed type.
+     * @throws InputParseException if the input couldn't be parsed correctly.
+     */
+    protected abstract E parseFromInput(@NotNull String[] arguments, ParserContext context) throws InputParseException;
+
+    /**
+     * Extracts arguments enclosed by {@code []} into an array.
+     * Example: {@code [Hello][World]} results in a list containing {@code Hello} and {@code World}.
+     *
+     * @param input          the input to extract arguments from.
+     * @param requireClosing whether or not the extraction requires valid bracketing.
+     * @return an array of extracted arguments.
+     * @throws InputParseException if {@code requireClosing == true} and the count of [ != the count of ]
+     */
+    protected String[] extractArguments(String input, boolean requireClosing) throws InputParseException {
+        int open = 0; // the "level"
+        int openIndex = 0;
+        int i = 0;
+        List<String> arguments = new ArrayList<>();
+        for (; i < input.length(); i++) {
+            if (input.charAt(i) == '[') {
+                if (open++ == 0) {
+                    openIndex = i;
+                }
+            }
+            if (input.charAt(i) == ']') {
+                if (--open == 0) {
+                    arguments.add(input.substring(openIndex + 1, i));
+                }
+            }
+        }
+        if (!requireClosing && open > 0) {
+            arguments.add(input.substring(openIndex + 1));
+        }
+        if (requireClosing && open != 0) {
+            throw new InputParseException("Invalid bracketing, are you missing a '[' or ']'?");
+        }
+        return arguments.toArray(new String[0]);
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/parser/pattern/RandomPatternParser.java

@@ -38,8 +38,9 @@ public class RandomPatternParser extends InputParser<Pattern> {
 
     @Override
     public Stream<String> getSuggestions(String input) {
-        String[] splits = input.split(",", -1);
-        List<String> patterns = StringUtil.parseListInQuotes(splits, ',', '[', ']', true);
+        List<String> patterns = StringUtil.split(input, ',', '[', ']');
+        /*String[] splits = input.split(",", -1);
+        List<String> patterns = StringUtil.parseListInQuotes(splits, ',', '[', ']', true);*/
         if (patterns.size() == 1) {
             return Stream.empty();
         }
@@ -63,8 +64,9 @@ public class RandomPatternParser extends InputParser<Pattern> {
     public Pattern parseFromInput(String input, ParserContext context) throws InputParseException {
         RandomPattern randomPattern = new RandomPattern();
 
-        String[] splits = input.split(",", -1);
-        List<String> patterns = StringUtil.parseListInQuotes(splits, ',', '[', ']', true);
+        List<String> patterns = StringUtil.split(input, ',', '[', ']');
+        /*String[] splits = input.split(",", -1);
+        List<String> patterns = StringUtil.parseListInQuotes(splits, ',', '[', ']', true);*/
         if (patterns.size() == 1) {
             return null; // let a 'single'-pattern parser handle it
         }
@@ -74,7 +76,7 @@ public class RandomPatternParser extends InputParser<Pattern> {
 
             // Parse special percentage syntax
             if (token.matches("[0-9]+(\\.[0-9]*)?%.*")) {
-                String[] p = token.split("%");
+                String[] p = token.split("%", 2);
 
                 if (p.length < 2) {
                     throw new InputParseException("Missing the type after the % symbol for '" + input + "'");

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/parser/pattern/SimplexPatternParser.java

@@ -0,0 +1,75 @@
+package com.sk89q.worldedit.extension.factory.parser.pattern;
+
+import com.boydti.fawe.object.random.SimplexRandom;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.extension.factory.parser.RichParser;
+import com.sk89q.worldedit.extension.input.InputParseException;
+import com.sk89q.worldedit.extension.input.ParserContext;
+import com.sk89q.worldedit.function.pattern.Pattern;
+import com.sk89q.worldedit.function.pattern.RandomPattern;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.stream.Stream;
+
+public class SimplexPatternParser extends RichParser<Pattern> {
+    private static final String SIMPLEX_PREFIX = "#simplex";
+
+    public SimplexPatternParser(WorldEdit worldEdit) {
+        super(worldEdit, SIMPLEX_PREFIX);
+    }
+
+    @Override
+    protected Stream<String> getSuggestions(String argumentInput, int index) {
+        if (index == 0) {
+            if (argumentInput.isEmpty()) {
+                return Stream.of("1", "2", "3", "4", "5", "6", "7", "8", "9");
+            }
+            // if already a valid number, suggest more digits
+            if (isDouble(argumentInput)) {
+                Stream<String> numbers = Stream.of("", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9");
+                if (argumentInput.indexOf('.') == -1) {
+                    numbers = Stream.concat(numbers, Stream.of("."));
+                }
+                return numbers.map(s -> argumentInput + s);
+            }
+            // no valid input anymore
+            return Stream.empty();
+        }
+        if (index == 1) {
+            return worldEdit.getPatternFactory().getSuggestions(argumentInput).stream();
+        }
+        return Stream.empty();
+    }
+
+    @Override
+    protected Pattern parseFromInput(@NotNull String[] arguments, ParserContext context) {
+        if (arguments.length != 2) {
+            throw new InputParseException("Simplex requires a scale and a pattern, e.g. #simplex[5][dirt,stone]");
+        }
+        double scale = Double.parseDouble(arguments[0]);
+        scale = 1d / Math.max(1, scale);
+        Pattern inner = worldEdit.getPatternFactory().parseFromInput(arguments[1], context);
+        if (inner instanceof RandomPattern) {
+            return new RandomPattern(new SimplexRandom(scale), (RandomPattern) inner);
+        } else if (inner instanceof BlockStateHolder) {
+            return inner; // single blocks won't have any impact on how simplex behaves
+        } else {
+            throw new InputParseException("Pattern " + inner.getClass().getSimpleName() + " cannot be used with #simplex");
+        }
+    }
+
+    private static boolean isDouble(String input) {
+        boolean point = false;
+        for (char c : input.toCharArray()) {
+            if (!Character.isDigit(c)) {
+                if (c == '.' && !point) {
+                    point = true;
+                } else {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/extension/platform/Platform.java

@@ -21,14 +21,17 @@ package com.sk89q.worldedit.extension.platform;
 
 import com.sk89q.worldedit.LocalConfiguration;
 import com.sk89q.worldedit.entity.Player;
+import com.sk89q.worldedit.util.SideEffect;
 import com.sk89q.worldedit.world.DataFixer;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.registry.Registries;
 import org.enginehub.piston.CommandManager;
 
 import javax.annotation.Nullable;
+
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * Represents a platform that WorldEdit has been implemented for.
@@ -174,4 +177,5 @@ public interface Platform {
      */
     Map<Capability, Preference> getCapabilities();
 
+    Set<SideEffect> getSupportedSideEffects();
 }

worldedit-core/src/main/java/com/sk89q/worldedit/extension/platform/PlatformCommandManager.java

@@ -94,6 +94,7 @@ import com.sk89q.worldedit.command.argument.ExpressionConverter;
 import com.sk89q.worldedit.command.argument.FactoryConverter;
 import com.sk89q.worldedit.command.argument.RegionFactoryConverter;
 import com.sk89q.worldedit.command.argument.RegistryConverter;
+import com.sk89q.worldedit.command.argument.SideEffectConverter;
 import com.sk89q.worldedit.command.argument.VectorConverter;
 import com.sk89q.worldedit.command.argument.WorldConverter;
 import com.sk89q.worldedit.command.argument.ZonedDateTimeConverter;
@@ -255,6 +256,7 @@ public final class PlatformCommandManager {
         RegionFactoryConverter.register(commandManager);
         WorldConverter.register(commandManager);
         ExpressionConverter.register(commandManager);
+        SideEffectConverter.register(commandManager);
 
         registerBindings(new ConsumeBindings(worldEdit, this));
         registerBindings(new PrimitiveBindings(worldEdit));

worldedit-core/src/main/java/com/sk89q/worldedit/extension/platform/PlatformManager.java

@@ -48,9 +48,11 @@ import com.sk89q.worldedit.event.platform.PlayerInputEvent;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.session.request.Request;
 import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.util.SideEffect;
 import com.sk89q.worldedit.util.eventbus.Subscribe;
 import com.sk89q.worldedit.world.World;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.EnumMap;
 import java.util.Iterator;
 import java.util.List;
@@ -304,6 +306,10 @@ public class PlatformManager {
         return queryCapability(Capability.CONFIGURATION).getConfiguration();
     }
 
+    public Collection<SideEffect> getSupportedSideEffects() {
+        return queryCapability(Capability.WORLD_EDITING).getSupportedSideEffects();
+    }
+
     @Subscribe
     public void handlePlatformReady(PlatformReadyEvent event) {
         choosePreferred();

worldedit-core/src/main/java/com/sk89q/worldedit/extent/buffer/ExtentBuffer.java

@@ -21,17 +21,16 @@ package com.sk89q.worldedit.extent.buffer;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
-import com.google.common.collect.Maps;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.extent.AbstractBufferingExtent;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.function.mask.Mask;
 import com.sk89q.worldedit.function.mask.Masks;
 import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.collection.BlockMap;
 import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
 import java.util.Map;
-import java.util.Optional;
 
 /**
  * Buffers changes to an {@link Extent} and allows retrieval of the changed blocks,
@@ -39,7 +38,7 @@ import java.util.Optional;
  */
 public class ExtentBuffer extends AbstractBufferingExtent {
 
-    private final Map<BlockVector3, BaseBlock> buffer = Maps.newHashMap();
+    private final Map<BlockVector3, BaseBlock> buffer = BlockMap.create();
     private final Mask mask;
 
     /**

worldedit-core/src/main/java/com/sk89q/worldedit/extent/reorder/ChunkBatchingExtent.java

@@ -19,7 +19,6 @@
 
 package com.sk89q.worldedit.extent.reorder;
 
-import com.google.common.collect.ImmutableSortedSet;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.extent.AbstractBufferingExtent;
 import com.sk89q.worldedit.extent.Extent;

worldedit-core/src/main/java/com/sk89q/worldedit/extent/world/SideEffectExtent.java

@@ -27,67 +27,38 @@ import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.function.operation.RunContext;
 import com.sk89q.worldedit.math.BlockVector2;
 import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
+import com.sk89q.worldedit.util.collection.BlockMap;
 import com.sk89q.worldedit.world.World;
+import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
-import com.sk89q.worldedit.world.block.BlockTypes;
 
 import java.util.HashSet;
 import java.util.Iterator;
-import java.util.List;
+import java.util.Map;
 import java.util.Set;
 
 /**
- * Implements "fast mode" which may skip physics, lighting, etc.
+ * An extent that sets blocks in the world, with a {@link SideEffectSet}.
  */
-public class FastModeExtent extends AbstractDelegateExtent {
+public class SideEffectExtent extends AbstractDelegateExtent {
 
     private final World world;
-    private final Set<BlockVector3> positions = new HashSet<>();
+    private final Map<BlockVector3, BlockState> positions = BlockMap.create();
     private final Set<BlockVector2> dirtyChunks = new HashSet<>();
-    private boolean enabled = true;
+    private SideEffectSet sideEffectSet = SideEffectSet.defaults();
     private boolean postEditSimulation;
 
-    /**
-     * Create a new instance with fast mode enabled.
-     *
-     * @param world the world
-     */
-    public FastModeExtent(World world) {
-        this(world, true);
-    }
-
     /**
      * Create a new instance.
      *
      * @param world the world
-     * @param enabled true to enable fast mode
      */
-    public FastModeExtent(World world, boolean enabled) {
+    public SideEffectExtent(World world) {
         super(world);
         checkNotNull(world);
         this.world = world;
-        this.enabled = enabled;
-        if (enabled) {
-            this.postEditSimulation = true;
-        }
-    }
-
-    /**
-     * Return whether fast mode is enabled.
-     *
-     * @return true if fast mode is enabled
-     */
-    public boolean isEnabled() {
-        return enabled;
-    }
-
-    /**
-     * Set fast mode enable status.
-     *
-     * @param enabled true to enable fast mode
-     */
-    public void setEnabled(boolean enabled) {
-        this.enabled = enabled;
     }
 
     public boolean isPostEditSimulationEnabled() {
@@ -98,26 +69,28 @@ public class FastModeExtent extends AbstractDelegateExtent {
         this.postEditSimulation = enabled;
     }
 
+    public SideEffectSet getSideEffectSet() {
+        return this.sideEffectSet;
+    }
+
+    public void setSideEffectSet(SideEffectSet sideEffectSet) {
+        this.sideEffectSet = sideEffectSet;
+    }
+
     @Override
     public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 location, B block) throws WorldEditException {
-        if (enabled || postEditSimulation) {
+        if (sideEffectSet.getState(SideEffect.LIGHTING) == SideEffect.State.DELAYED) {
             dirtyChunks.add(BlockVector2.at(location.getBlockX() >> 4, location.getBlockZ() >> 4));
-
-            if (world.setBlock(location, block, false)) {
-                if (!enabled && postEditSimulation) {
-                    positions.add(location);
-                }
-                return true;
-            }
-
-            return false;
-        } else {
-            return world.setBlock(location, block, true);
         }
+        if (postEditSimulation) {
+            positions.put(location, world.getBlock(location));
+        }
+
+        return world.setBlock(location, block, postEditSimulation ? SideEffectSet.none() : sideEffectSet);
     }
 
     public boolean commitRequired() {
-        return enabled || postEditSimulation;
+        return postEditSimulation || !dirtyChunks.isEmpty();
     }
 
     @Override
@@ -132,11 +105,11 @@ public class FastModeExtent extends AbstractDelegateExtent {
                     world.fixAfterFastMode(dirtyChunks);
                 }
 
-                if (!enabled && postEditSimulation) {
-                    Iterator<BlockVector3> positionIterator = positions.iterator();
+                if (postEditSimulation) {
+                    Iterator<Map.Entry<BlockVector3, BlockState>> positionIterator = positions.entrySet().iterator();
                     while (run.shouldContinue() && positionIterator.hasNext()) {
-                        BlockVector3 position = positionIterator.next();
-                        world.notifyAndLightBlock(position, BlockTypes.AIR.getDefaultState());
+                        Map.Entry<BlockVector3, BlockState> position = positionIterator.next();
+                        world.applySideEffects(position.getKey(), position.getValue(), sideEffectSet);
                         positionIterator.remove();
                     }
 
@@ -151,5 +124,4 @@ public class FastModeExtent extends AbstractDelegateExtent {
             }
         };
     }
-
 }

worldedit-core/src/main/java/com/sk89q/worldedit/function/pattern/RandomPattern.java

@@ -52,6 +52,19 @@ public class RandomPattern extends AbstractPattern {
         this.random = random;
     }
 
+    /**
+     * Create a random pattern from an existing one but with a different random.
+     *
+     * @param random the new random to use.
+     * @param parent the existing random pattern.
+     */
+    public RandomPattern(SimpleRandom random, RandomPattern parent) {
+        this.random = random;
+        this.weights = parent.weights;
+        this.collection = RandomCollection.of(weights, random);
+        this.patterns = parent.patterns;
+    }
+
     /**
      * Add a pattern to the weight list of patterns.
      *

worldedit-core/src/main/java/com/sk89q/worldedit/internal/wna/WorldNativeAccess.java

@@ -0,0 +1,184 @@
+/*
+ * 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.internal.wna;
+
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
+import com.sk89q.worldedit.world.block.BaseBlock;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+
+import javax.annotation.Nullable;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Natively access and perform operations on the world.
+ *
+ * @param <NC> the native chunk type
+ * @param <NBS> the native block state type
+ * @param <NP> the native position type
+ */
+public interface WorldNativeAccess<NC, NBS, NP> {
+
+    default <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
+        checkNotNull(position);
+        checkNotNull(block);
+        setCurrentSideEffectSet(sideEffects);
+
+        int x = position.getBlockX();
+        int y = position.getBlockY();
+        int z = position.getBlockZ();
+
+        // First set the block
+        NC chunk = getChunk(x >> 4, z >> 4);
+        NP pos = getPosition(x, y, z);
+        NBS old = getBlockState(chunk, pos);
+        NBS newState = toNative(block.toImmutableState());
+        // change block prior to placing if it should be fixed
+        if (sideEffects.shouldApply(SideEffect.VALIDATION)) {
+            newState = getValidBlockForPosition(newState, pos);
+        }
+        NBS successState = setBlockState(chunk, pos, newState);
+        boolean successful = successState != null;
+
+        // Create the TileEntity
+        if (successful || old == newState) {
+            if (block instanceof BaseBlock) {
+                BaseBlock baseBlock = (BaseBlock) block;
+                CompoundTag tag = baseBlock.getNbtData();
+                if (tag != null) {
+                    tag = tag.createBuilder()
+                        .putString("id", baseBlock.getNbtId())
+                        .putInt("x", position.getX())
+                        .putInt("y", position.getY())
+                        .putInt("z", position.getZ())
+                        .build();
+                    // update if TE changed as well
+                    successful = updateTileEntity(pos, tag);
+                }
+            }
+        }
+
+        if (successful) {
+            if (sideEffects.getState(SideEffect.LIGHTING) == SideEffect.State.ON) {
+                updateLightingForBlock(pos);
+            }
+            markAndNotifyBlock(pos, chunk, old, newState, sideEffects);
+        }
+
+        return successful;
+    }
+
+    default void applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet) {
+        setCurrentSideEffectSet(sideEffectSet);
+        NP pos = getPosition(position.getX(), position.getY(), position.getZ());
+        NC chunk = getChunk(position.getX() >> 4, position.getZ() >> 4);
+        NBS oldData = toNative(previousType);
+        NBS newData = getBlockState(chunk, pos);
+
+        if (sideEffectSet.getState(SideEffect.LIGHTING) == SideEffect.State.ON) {
+            updateLightingForBlock(pos);
+        }
+
+        markAndNotifyBlock(pos, chunk, oldData, newData, sideEffectSet);
+    }
+
+    // state-keeping functions for WNA
+    // may be thread-unsafe, as this is single-threaded code
+
+    /**
+     * Receive the current side-effect set from the high level call.
+     *
+     * This allows the implementation to branch on the side-effects internally.
+     *
+     * @param sideEffectSet the set of side-effects
+     */
+    default void setCurrentSideEffectSet(SideEffectSet sideEffectSet) {
+    }
+
+    // access functions
+
+    NC getChunk(int x, int z);
+
+    NBS toNative(BlockState state);
+
+    NBS getBlockState(NC chunk, NP position);
+
+    @Nullable
+    NBS setBlockState(NC chunk, NP position, NBS state);
+
+    NBS getValidBlockForPosition(NBS block, NP position);
+
+    NP getPosition(int x, int y, int z);
+
+    void updateLightingForBlock(NP position);
+
+    boolean updateTileEntity(NP position, CompoundTag tag);
+
+    void notifyBlockUpdate(NP position, NBS oldState, NBS newState);
+
+    boolean isChunkTicking(NC chunk);
+
+    void markBlockChanged(NP position);
+
+    void notifyNeighbors(NP pos, NBS oldState, NBS newState);
+
+    void updateNeighbors(NP pos, NBS oldState, NBS newState, int recursionLimit);
+
+    void onBlockStateChange(NP pos, NBS oldState, NBS newState);
+
+    /**
+     * This is a heavily modified function stripped from MC to apply worldedit-modifications.
+     *
+     * See Forge's World.markAndNotifyBlock
+     */
+    default void markAndNotifyBlock(NP pos, NC chunk, NBS oldState, NBS newState, SideEffectSet sideEffectSet) {
+        NBS blockState1 = getBlockState(chunk, pos);
+        if (blockState1 != newState) {
+            return;
+        }
+
+        // Remove redundant branches
+        if (isChunkTicking(chunk)) {
+            if (sideEffectSet.shouldApply(SideEffect.ENTITY_AI)) {
+                notifyBlockUpdate(pos, oldState, newState);
+            } else {
+                // If we want to skip entity AI, just mark the block for sending
+                markBlockChanged(pos);
+            }
+        }
+
+        if (sideEffectSet.shouldApply(SideEffect.NEIGHBORS)) {
+            notifyNeighbors(pos, oldState, newState);
+        }
+
+        // Make connection updates optional
+        if (sideEffectSet.shouldApply(SideEffect.VALIDATION)) {
+            updateNeighbors(pos, oldState, newState, 512);
+        }
+
+        onBlockStateChange(pos, oldState, newState);
+    }
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/internal/wna/package-info.java

@@ -0,0 +1,25 @@
+/*
+ * 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/>.
+ */
+
+/**
+ * "WNA", or WorldEdit Native Access.
+ *
+ * Contains internal helper functions for sharing code between platforms.
+ */
+package com.sk89q.worldedit.internal.wna;

worldedit-core/src/main/java/com/sk89q/worldedit/util/SideEffect.java

@@ -0,0 +1,68 @@
+/*
+ * 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.util;
+
+import java.util.Locale;
+
+public enum SideEffect {
+    LIGHTING(State.ON),
+    NEIGHBORS(State.ON),
+    VALIDATION(State.ON),
+    ENTITY_AI(State.OFF),
+    EVENTS(State.OFF);
+
+    private final String displayName;
+    private final String description;
+    private final State defaultValue;
+
+    SideEffect(State defaultValue) {
+        this.displayName = "worldedit.sideeffect." + this.name().toLowerCase(Locale.US);
+        this.description = "worldedit.sideeffect." + this.name().toLowerCase(Locale.US) + ".description";
+        this.defaultValue = defaultValue;
+    }
+
+    public String getDisplayName() {
+        return this.displayName;
+    }
+
+    public String getDescription() {
+        return this.description;
+    }
+
+    public State getDefaultValue() {
+        return this.defaultValue;
+    }
+
+    public enum State {
+        OFF,
+        ON,
+        DELAYED;
+
+        private final String displayName;
+
+        State() {
+            this.displayName = "worldedit.sideeffect.state." + this.name().toLowerCase(Locale.US);
+        }
+
+        public String getDisplayName() {
+            return this.displayName;
+        }
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/util/SideEffectSet.java

@@ -0,0 +1,94 @@
+/*
+ * 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.util;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+
+import java.util.Arrays;
+import java.util.EnumMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+public class SideEffectSet {
+    private static final SideEffectSet DEFAULT = new SideEffectSet(
+            Arrays.stream(SideEffect.values()).collect(Collectors.toMap(Function.identity(), SideEffect::getDefaultValue))
+    );
+    private static final SideEffectSet NONE = new SideEffectSet();
+
+    private final Map<SideEffect, SideEffect.State> sideEffects;
+    private final Set<SideEffect> appliedSideEffects;
+    private final boolean appliesAny;
+
+    private SideEffectSet() {
+        this(ImmutableMap.of());
+    }
+
+    public SideEffectSet(Map<SideEffect, SideEffect.State> sideEffects) {
+        this.sideEffects = Maps.immutableEnumMap(sideEffects);
+
+        appliedSideEffects = sideEffects.entrySet()
+                .stream()
+                .filter(entry -> entry.getValue() != SideEffect.State.OFF)
+                .map(Map.Entry::getKey)
+                .collect(Collectors.toSet());
+        appliesAny = !appliedSideEffects.isEmpty();
+    }
+
+    public SideEffectSet with(SideEffect sideEffect, SideEffect.State state) {
+        Map<SideEffect, SideEffect.State> entries = this.sideEffects.isEmpty() ? Maps.newEnumMap(SideEffect.class) : new EnumMap<>(this.sideEffects);
+        entries.put(sideEffect, state);
+        return new SideEffectSet(entries);
+    }
+
+    public boolean doesApplyAny() {
+        return this.appliesAny;
+    }
+
+    public SideEffect.State getState(SideEffect effect) {
+        return sideEffects.getOrDefault(effect, effect.getDefaultValue());
+    }
+
+    /**
+     * Gets whether this side effect is not off.
+     *
+     * This returns whether it is either delayed or on.
+     *
+     * @param effect The side effect
+     * @return Whether it should apply
+     */
+    public boolean shouldApply(SideEffect effect) {
+        return getState(effect) != SideEffect.State.OFF;
+    }
+
+    public Set<SideEffect> getSideEffectsToApply() {
+        return this.appliedSideEffects;
+    }
+
+    public static SideEffectSet defaults() {
+        return DEFAULT;
+    }
+
+    public static SideEffectSet none() {
+        return NONE;
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/util/formatting/component/SideEffectBox.java

@@ -0,0 +1,88 @@
+/*
+ * 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.util.formatting.component;
+
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
+import com.sk89q.worldedit.util.formatting.text.Component;
+import com.sk89q.worldedit.util.formatting.text.TextComponent;
+import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
+import com.sk89q.worldedit.util.formatting.text.event.ClickEvent;
+import com.sk89q.worldedit.util.formatting.text.event.HoverEvent;
+import com.sk89q.worldedit.util.formatting.text.format.TextColor;
+
+import java.util.Comparator;
+import java.util.List;
+import java.util.Locale;
+import java.util.stream.Collectors;
+
+public class SideEffectBox extends PaginationBox {
+
+    private static List<SideEffect> sideEffects;
+
+    private SideEffectSet sideEffectSet;
+
+    private static List<SideEffect> getSideEffects() {
+        if (sideEffects == null) {
+            sideEffects = WorldEdit.getInstance().getPlatformManager().getSupportedSideEffects()
+                    .stream()
+                    .sorted(Comparator.comparing(Enum::name))
+                    .collect(Collectors.toList());
+        }
+
+        return sideEffects;
+    }
+
+    public SideEffectBox(SideEffectSet sideEffectSet) {
+        super("Side Effects");
+
+        this.sideEffectSet = sideEffectSet;
+    }
+
+    private static final SideEffect.State[] SHOWN_VALUES = {SideEffect.State.OFF, SideEffect.State.ON};
+
+    @Override
+    public Component getComponent(int number) {
+        SideEffect effect = getSideEffects().get(number);
+        SideEffect.State state = this.sideEffectSet.getState(effect);
+
+        TextComponent.Builder builder = TextComponent.builder();
+        builder = builder.append(TranslatableComponent.of(effect.getDisplayName(), TextColor.YELLOW)
+                .hoverEvent(HoverEvent.of(HoverEvent.Action.SHOW_TEXT, TranslatableComponent.of(effect.getDescription()))));
+        for (SideEffect.State uiState : SHOWN_VALUES) {
+            builder = builder.append(TextComponent.space());
+            builder = builder.append(TranslatableComponent.of(uiState.getDisplayName(), uiState == state ? TextColor.WHITE : TextColor.GRAY)
+                    .clickEvent(ClickEvent.runCommand("//fast -h " + effect.name().toLowerCase(Locale.US) + " " + uiState.name().toLowerCase(Locale.US)))
+                    .hoverEvent(HoverEvent.showText(uiState == state
+                            ? TranslatableComponent.of("worldedit.sideeffect.box.current")
+                            : TranslatableComponent.of("worldedit.sideeffect.box.change-to", TranslatableComponent.of(uiState.getDisplayName()))
+                    ))
+            );
+        }
+
+        return builder.build();
+    }
+
+    @Override
+    public int getComponentsSize() {
+        return getSideEffects().size();
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/world/AbstractWorld.java

@@ -32,6 +32,7 @@ import com.sk89q.worldedit.math.BlockVector2;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.util.Direction;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
 import com.sk89q.worldedit.world.weather.WeatherType;
 import com.sk89q.worldedit.world.block.BlockType;
@@ -57,7 +58,7 @@ public abstract class AbstractWorld implements World {
 
     @Override
     public final <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 pt, B block) throws WorldEditException {
-        return setBlock(pt, block, true);
+        return setBlock(pt, block, SideEffectSet.defaults());
     }
 
     @Override

worldedit-core/src/main/java/com/sk89q/worldedit/world/NullWorld.java

@@ -23,6 +23,7 @@ import com.boydti.fawe.beta.IChunkGet;
 import com.boydti.fawe.beta.implementation.packet.ChunkPacket;
 import com.boydti.fawe.beta.implementation.blocks.NullChunkGet;
 import com.sk89q.jnbt.CompoundTag;
+import com.google.common.collect.ImmutableSet;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.WorldEditException;
@@ -35,6 +36,8 @@ import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.util.TreeGenerator.TreeType;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.biome.BiomeTypes;
@@ -48,6 +51,7 @@ import com.sk89q.worldedit.world.weather.WeatherTypes;
 import javax.annotation.Nullable;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * A null implementation of {@link World} that drops all changes and
@@ -71,13 +75,14 @@ public class NullWorld extends AbstractWorld {
     }
 
     @Override
-    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, boolean notifyAndLight) throws WorldEditException {
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
         return false;
     }
 
     @Override
-    public boolean notifyAndLightBlock(BlockVector3 position, BlockState previousType) throws WorldEditException {
-        return false;
+    public Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet)
+            throws WorldEditException {
+        return ImmutableSet.of();
     }
 
     @Override

worldedit-core/src/main/java/com/sk89q/worldedit/world/World.java

@@ -37,15 +37,19 @@ import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.registry.Keyed;
 import com.sk89q.worldedit.util.Direction;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.util.TreeGenerator;
 import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
 import com.sk89q.worldedit.world.block.BlockType;
 import com.sk89q.worldedit.world.weather.WeatherType;
 
-import javax.annotation.Nullable;
 import java.nio.file.Path;
 import java.util.Locale;
+import java.util.Set;
+
+import javax.annotation.Nullable;
 
 /**
  * Represents a world (dimension).
@@ -112,10 +116,28 @@ public interface World extends Extent, Keyed, IChunkCache<IChunkGet> {
      * @param notifyAndLight true to to notify and light
      * @return true if the block was successfully set (return value may not be accurate)
      */
+    @Deprecated
     default <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, boolean notifyAndLight) throws WorldEditException {
-        return setBlock(position, block);
+        return setBlock(position, block, notifyAndLight ? SideEffectSet.defaults() : SideEffectSet.none());
     }
 
+    /**
+     * Similar to {@link Extent#setBlock(BlockVector3, BlockStateHolder)} but a
+     * {@code sideEffects} parameter indicates which side effects should be applied
+     * to the block. This includes block updates, lighting, and others. See {@link SideEffect}
+     * for a full list.
+     *
+     * <p>Not all implementations support all side effects. Use
+     * {@link Platform#getSupportedSideEffects()} for a list of supported side effects.
+     * Non-supported side effects will be ignored.</p>
+     *
+     * @param position position of the block
+     * @param block block to set
+     * @param sideEffects which side effects to perform
+     * @return true if the block was successfully set (return value may not be accurate)
+     */
+    <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException;
+
     /**
      * Notifies the simulation that the block at the given location has
      * been changed and it must be re-lighted (and issue other events).
@@ -124,7 +146,20 @@ public interface World extends Extent, Keyed, IChunkCache<IChunkGet> {
      * @param previousType the type of the previous block that was there
      * @return true if the block was successfully notified
      */
-    boolean notifyAndLightBlock(BlockVector3 position, BlockState previousType) throws WorldEditException;
+    @Deprecated
+    default boolean notifyAndLightBlock(BlockVector3 position, BlockState previousType) throws WorldEditException {
+        return !applySideEffects(position, previousType, SideEffectSet.defaults()).isEmpty();
+    }
+
+    /**
+     * Applies a set of side effects on the given block.
+     *
+     * @param position position of the block
+     * @param previousType the type of the previous block that was there
+     * @param sideEffectSet which side effects to perform
+     * @return a set of side effects that were applied
+     */
+    Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet) throws WorldEditException;
 
     /**
      * Get the light level at the given block.

worldedit-core/src/main/resources/lang/strings.json

@@ -210,6 +210,10 @@
     "worldedit.fast.enabled": "Fast mode enabled. Lighting in the affected chunks may be wrong and/or you may need to rejoin to see changes.",
     "worldedit.fast.disabled.already": "Fast mode already disabled.",
     "worldedit.fast.enabled.already": "Fast mode already enabled.",
+    "worldedit.fast.sideeffect.set": "Side effect \"{0}\" set to {1}",
+    "worldedit.fast.sideeffect.get": "Side effect \"{0}\" is set to {1}",
+    "worldedit.fast.sideeffect.already-set": "Side effect \"{0}\" is already {1}",
+    "worldedit.fast.sideeffect.set-all": "All side effects set to {0}",
     "worldedit.reorder.current": "The reorder mode is {0}",
     "worldedit.reorder.set": "The reorder mode is now {0}",
     "worldedit.gmask.disabled": "Global mask disabled.",
@@ -494,6 +498,22 @@
     "worldedit.selection.sphere.explain.secondary": "Radius set to {0}.",
     "worldedit.selection.sphere.explain.secondary-defined": "Radius set to {0} ({1}).",
 
+    "worldedit.sideeffect.lighting": "Lighting",
+    "worldedit.sideeffect.lighting.description": "Updates block lighting",
+    "worldedit.sideeffect.neighbors": "Neighbors",
+    "worldedit.sideeffect.neighbors.description": "Notifies nearby blocks of changes",
+    "worldedit.sideeffect.validation": "Validation",
+    "worldedit.sideeffect.validation.description": "Validates and fixes inconsistent world state, such as disconnected blocks",
+    "worldedit.sideeffect.entity_ai": "Entity AI",
+    "worldedit.sideeffect.entity_ai.description": "Updates Entity AI paths for the block changes",
+    "worldedit.sideeffect.events": "Mod/Plugin Events",
+    "worldedit.sideeffect.events.description": "Tells other mods/plugins about these changes when applicable",
+    "worldedit.sideeffect.state.on": "On",
+    "worldedit.sideeffect.state.delayed": "Delayed",
+    "worldedit.sideeffect.state.off": "Off",
+    "worldedit.sideeffect.box.current": "Current",
+    "worldedit.sideeffect.box.change-to": "Click to set to {0}",
+
     "worldedit.help.command-not-found": "The command '{0}' could not be found.",
     "worldedit.help.no-subcommands": "'{0}' has no sub-commands. (Maybe '{1}' is for a parameter?)",
     "worldedit.help.subcommand-not-found": "The sub-command '{0}' under '{1}' could not be found.",

worldedit-fabric/build.gradle.kts

@@ -7,8 +7,8 @@ applyShadowConfiguration()
 apply(plugin = "fabric-loom")
 
 val minecraftVersion = "1.15.2"
-val yarnMappings = "1.15.2+build.8:v2"
-val loaderVersion = "0.7.6+build.180"
+val yarnMappings = "1.15.2+build.14:v2"
+val loaderVersion = "0.7.8+build.189"
 
 configurations.all {
     resolutionStrategy {
@@ -61,16 +61,12 @@ tasks.named<Copy>("processResources") {
     }
 }
 
-<<<<<<< HEAD
-addJarManifest(includeClasspath = true)
-=======
 tasks.named<Jar>("jar") {
     manifest {
         attributes("Class-Path" to CLASSPATH,
                    "WorldEdit-Version" to project.version)
     }
 }
->>>>>>> 18a55bc14... Add new experimental snapshot API (#524)
 
 tasks.named<ShadowJar>("shadowJar") {
     archiveClassifier.set("dist-dev")

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricAdapter.java

@@ -25,6 +25,7 @@ import com.google.common.collect.ImmutableList;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.Tag;
 import com.sk89q.worldedit.blocks.BaseItemStack;
+import com.sk89q.worldedit.fabric.internal.NBTConverter;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.registry.state.BooleanProperty;

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricDataFixer.java

@@ -36,9 +36,10 @@ import com.mojang.datafixers.DataFixerBuilder;
 import com.mojang.datafixers.Dynamic;
 import com.mojang.datafixers.schemas.Schema;
 import com.sk89q.jnbt.CompoundTag;
-import net.minecraft.datafixers.NbtOps;
-import net.minecraft.datafixers.Schemas;
-import net.minecraft.datafixers.TypeReferences;
+import com.sk89q.worldedit.fabric.internal.NBTConverter;
+import net.minecraft.datafixer.NbtOps;
+import net.minecraft.datafixer.Schemas;
+import net.minecraft.datafixer.TypeReferences;
 import net.minecraft.nbt.FloatTag;
 import net.minecraft.nbt.ListTag;
 import net.minecraft.nbt.StringTag;

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricEntity.java

@@ -25,6 +25,7 @@ import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.entity.metadata.EntityProperties;
 import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.fabric.internal.NBTConverter;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.world.NullWorld;

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricPlatform.java

@@ -19,6 +19,7 @@
 
 package com.sk89q.worldedit.fabric;
 
+import com.google.common.collect.Sets;
 import com.sk89q.worldedit.command.util.PermissionCondition;
 import com.sk89q.worldedit.entity.Player;
 import com.sk89q.worldedit.extension.platform.AbstractPlatform;
@@ -27,13 +28,13 @@ import com.sk89q.worldedit.extension.platform.Capability;
 import com.sk89q.worldedit.extension.platform.MultiUserPlatform;
 import com.sk89q.worldedit.extension.platform.Preference;
 import com.sk89q.worldedit.extension.platform.Watchdog;
+import com.sk89q.worldedit.util.SideEffect;
 import com.sk89q.worldedit.world.DataFixer;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.registry.Registries;
 import net.minecraft.SharedConstants;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.PlayerManager;
-import net.minecraft.server.dedicated.DedicatedServer;
 import net.minecraft.server.dedicated.MinecraftDedicatedServer;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.server.world.ServerWorld;
@@ -200,6 +201,18 @@ class FabricPlatform extends AbstractPlatform implements MultiUserPlatform {
         return capabilities;
     }
 
+    private static final Set<SideEffect> SUPPORTED_SIDE_EFFECTS = Sets.immutableEnumSet(
+            SideEffect.VALIDATION,
+            SideEffect.ENTITY_AI,
+            SideEffect.LIGHTING,
+            SideEffect.NEIGHBORS
+    );
+
+    @Override
+    public Set<SideEffect> getSupportedSideEffects() {
+        return SUPPORTED_SIDE_EFFECTS;
+    }
+
     @Override
     public Collection<Actor> getConnectedUsers() {
         List<Actor> users = new ArrayList<>();

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricPlayer.java

@@ -25,6 +25,7 @@ import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.extension.platform.AbstractPlayerActor;
 import com.sk89q.worldedit.extent.inventory.BlockBag;
+import com.sk89q.worldedit.fabric.internal.NBTConverter;
 import com.sk89q.worldedit.fabric.mixin.AccessorServerPlayerEntity;
 import com.sk89q.worldedit.fabric.net.handler.WECUIPacketHandler;
 import com.sk89q.worldedit.internal.cui.CUIEvent;
@@ -42,10 +43,10 @@ import com.sk89q.worldedit.world.block.BlockStateHolder;
 import com.sk89q.worldedit.world.block.BlockTypes;
 import io.netty.buffer.Unpooled;
 import net.minecraft.block.Block;
-import net.minecraft.client.network.packet.BlockEntityUpdateS2CPacket;
-import net.minecraft.client.network.packet.BlockUpdateS2CPacket;
-import net.minecraft.client.network.packet.CustomPayloadS2CPacket;
 import net.minecraft.item.ItemStack;
+import net.minecraft.network.packet.s2c.play.BlockEntityUpdateS2CPacket;
+import net.minecraft.network.packet.s2c.play.BlockUpdateS2CPacket;
+import net.minecraft.network.packet.s2c.play.CustomPayloadS2CPacket;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.text.LiteralText;
 import net.minecraft.text.Text;

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricWorld.java

@@ -24,6 +24,7 @@ import static com.google.common.base.Preconditions.checkNotNull;
 import com.google.common.cache.CacheBuilder;
 import com.google.common.cache.CacheLoader;
 import com.google.common.cache.LoadingCache;
+import com.google.common.collect.Sets;
 import com.google.common.io.Files;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.EditSession;
@@ -33,6 +34,8 @@ import com.sk89q.worldedit.blocks.BaseItem;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
+import com.sk89q.worldedit.fabric.internal.FabricWorldNativeAccess;
+import com.sk89q.worldedit.fabric.internal.NBTConverter;
 import com.sk89q.worldedit.internal.Constants;
 import com.sk89q.worldedit.internal.block.BlockStateIdAccess;
 import com.sk89q.worldedit.math.BlockVector2;
@@ -42,6 +45,8 @@ import com.sk89q.worldedit.regions.CuboidRegion;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Direction;
 import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
 import com.sk89q.worldedit.util.TreeGenerator.TreeType;
 import com.sk89q.worldedit.world.AbstractWorld;
 import com.sk89q.worldedit.world.biome.BiomeType;
@@ -71,6 +76,7 @@ import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.ChunkPos;
 import net.minecraft.world.World;
 import net.minecraft.world.WorldSaveHandler;
+import net.minecraft.world.biome.DefaultBiomeFeatures;
 import net.minecraft.world.chunk.Chunk;
 import net.minecraft.world.chunk.ChunkManager;
 import net.minecraft.world.chunk.ChunkStatus;
@@ -104,6 +110,7 @@ import java.util.Locale;
 import java.util.Optional;
 import java.util.OptionalInt;
 import java.util.Random;
+import java.util.Set;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ThreadLocalRandom;
 import java.util.stream.Collectors;
@@ -123,6 +130,7 @@ public class FabricWorld extends AbstractWorld {
     private static final net.minecraft.block.BlockState JUNGLE_SHRUB = Blocks.OAK_LEAVES.getDefaultState().with(LeavesBlock.PERSISTENT, Boolean.TRUE);
 
     private final WeakReference<World> worldRef;
+    private final FabricWorldNativeAccess worldNativeAccess;
 
     /**
      * Construct a new world.
@@ -132,6 +140,7 @@ public class FabricWorld extends AbstractWorld {
     FabricWorld(World world) {
         checkNotNull(world);
         this.worldRef = new WeakReference<>(world);
+        this.worldNativeAccess = new FabricWorldNativeAccess(worldRef);
     }
 
     /**
@@ -186,61 +195,14 @@ public class FabricWorld extends AbstractWorld {
     }
 
     @Override
-    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, boolean notifyAndLight) throws WorldEditException {
-        checkNotNull(position);
-        checkNotNull(block);
-
-        World world = getWorldChecked();
-        int x = position.getBlockX();
-        int y = position.getBlockY();
-        int z = position.getBlockZ();
-
-        // First set the block
-        Chunk chunk = world.getChunk(x >> 4, z >> 4);
-        BlockPos pos = new BlockPos(x, y, z);
-        net.minecraft.block.BlockState old = chunk.getBlockState(pos);
-        OptionalInt stateId = BlockStateIdAccess.getBlockStateId(block.toImmutableState());
-        net.minecraft.block.BlockState newState = stateId.isPresent() ? Block.getStateFromRawId(stateId.getAsInt()) : FabricAdapter.adapt(block.toImmutableState());
-        net.minecraft.block.BlockState successState = chunk.setBlockState(pos, newState, false);
-        boolean successful = successState != null;
-
-        // Create the TileEntity
-        if (successful || old == newState) {
-            if (block instanceof BaseBlock) {
-                CompoundTag tag = ((BaseBlock) block).getNbtData();
-                if (tag != null) {
-                    net.minecraft.nbt.CompoundTag nativeTag = NBTConverter.toNative(tag);
-                    BlockEntity tileEntity = getWorld().getWorldChunk(pos).getBlockEntity(pos);
-                    if (tileEntity != null) {
-                        tileEntity.fromTag(nativeTag);
-                        tileEntity.setPos(pos);
-                        tileEntity.setWorld(world);
-                        successful = true; // update if TE changed as well
-                    }
-                }
-            }
-        }
-
-        if (successful && notifyAndLight) {
-            world.getChunkManager().getLightingProvider().enqueueLightUpdate(pos);
-            world.scheduleBlockRender(pos, old, newState);
-            world.updateListeners(pos, old, newState, UPDATE | NOTIFY);
-            world.updateNeighbors(pos, newState.getBlock());
-            if (old.hasComparatorOutput()) {
-                world.updateHorizontalAdjacent(pos, newState.getBlock());
-            }
-        }
-
-        return successful;
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
+        return worldNativeAccess.setBlock(position, block, sideEffects);
     }
 
     @Override
-    public boolean notifyAndLightBlock(BlockVector3 position, BlockState previousType) throws WorldEditException {
-        BlockPos pos = new BlockPos(position.getX(), position.getY(), position.getZ());
-        net.minecraft.block.BlockState state = getWorld().getBlockState(pos);
-        getWorld().updateListeners(pos, FabricAdapter.adapt(previousType), state, 1 | 2);
-        getWorld().updateNeighbors(pos, state.getBlock());
-        return true;
+    public Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet) throws WorldEditException {
+        worldNativeAccess.applySideEffects(position, previousType, sideEffectSet);
+        return Sets.intersection(FabricWorldEdit.inst.getPlatform().getSupportedSideEffects(), sideEffectSet.getSideEffectsToApply());
     }
 
     @Override

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/internal/FabricWorldNativeAccess.java

@@ -0,0 +1,139 @@
+/*
+ * 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.fabric.internal;
+
+import com.sk89q.worldedit.fabric.FabricAdapter;
+import com.sk89q.worldedit.internal.block.BlockStateIdAccess;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.server.world.ChunkHolder;
+import net.minecraft.server.world.ServerChunkManager;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.WorldChunk;
+
+import javax.annotation.Nullable;
+import java.lang.ref.WeakReference;
+import java.util.Objects;
+
+public class FabricWorldNativeAccess implements WorldNativeAccess<WorldChunk, BlockState, BlockPos> {
+    private static final int UPDATE = 1, NOTIFY = 2;
+
+    private final WeakReference<World> world;
+
+    public FabricWorldNativeAccess(WeakReference<World> world) {
+        this.world = world;
+    }
+
+    private World getWorld() {
+        return Objects.requireNonNull(world.get(), "The reference to the world was lost");
+    }
+
+    @Override
+    public WorldChunk getChunk(int x, int z) {
+        return getWorld().getChunk(x, z);
+    }
+
+    @Override
+    public BlockState toNative(com.sk89q.worldedit.world.block.BlockState state) {
+        int stateId = BlockStateIdAccess.getBlockStateId(state);
+        return BlockStateIdAccess.isValidInternalId(stateId)
+            ? Block.getStateFromRawId(stateId)
+            : FabricAdapter.adapt(state);
+    }
+
+    @Override
+    public BlockState getBlockState(WorldChunk chunk, BlockPos position) {
+        return chunk.getBlockState(position);
+    }
+
+    @Nullable
+    @Override
+    public BlockState setBlockState(WorldChunk chunk, BlockPos position, BlockState state) {
+        return chunk.setBlockState(position, state, false);
+    }
+
+    @Override
+    public BlockState getValidBlockForPosition(BlockState block, BlockPos position) {
+        return Block.getRenderingState(block, getWorld(), position);
+    }
+
+    @Override
+    public BlockPos getPosition(int x, int y, int z) {
+        return new BlockPos(x, y, z);
+    }
+
+    @Override
+    public void updateLightingForBlock(BlockPos position) {
+        getWorld().getChunkManager().getLightingProvider().checkBlock(position);
+    }
+
+    @Override
+    public boolean updateTileEntity(BlockPos position, com.sk89q.jnbt.CompoundTag tag) {
+        CompoundTag nativeTag = NBTConverter.toNative(tag);
+        BlockEntity tileEntity = getWorld().getWorldChunk(position).getBlockEntity(position);
+        if (tileEntity == null) {
+            return false;
+        }
+        tileEntity.setLocation(getWorld(), position);
+        tileEntity.fromTag(nativeTag);
+        return true;
+    }
+
+    @Override
+    public void notifyBlockUpdate(BlockPos position, BlockState oldState, BlockState newState) {
+        getWorld().updateListeners(position, oldState, newState, UPDATE | NOTIFY);
+    }
+
+    @Override
+    public boolean isChunkTicking(WorldChunk chunk) {
+        return chunk.getLevelType().isAfter(ChunkHolder.LevelType.TICKING);
+    }
+
+    @Override
+    public void markBlockChanged(BlockPos position) {
+        ((ServerChunkManager) getWorld().getChunkManager()).markForUpdate(position);
+    }
+
+    @Override
+    public void notifyNeighbors(BlockPos pos, BlockState oldState, BlockState newState) {
+        getWorld().updateNeighbors(pos, oldState.getBlock());
+        if (newState.hasComparatorOutput()) {
+            getWorld().updateHorizontalAdjacent(pos, newState.getBlock());
+        }
+    }
+
+    @Override
+    public void updateNeighbors(BlockPos pos, BlockState oldState, BlockState newState) {
+        World world = getWorld();
+        // method_11637 = updateDiagonalNeighbors
+        oldState.method_11637(world, pos, NOTIFY);
+        newState.updateNeighborStates(world, pos, NOTIFY);
+        newState.method_11637(world, pos, NOTIFY);
+    }
+
+    @Override
+    public void onBlockStateChange(BlockPos pos, BlockState oldState, BlockState newState) {
+        getWorld().onBlockChanged(pos, oldState, newState);
+    }
+}

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/internal/NBTConverter.java

@@ -17,7 +17,7 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-package com.sk89q.worldedit.fabric;
+package com.sk89q.worldedit.fabric.internal;
 
 import com.sk89q.jnbt.ByteArrayTag;
 import com.sk89q.jnbt.ByteTag;
@@ -44,7 +44,7 @@ import java.util.Set;
 /**
  * Converts between JNBT and Minecraft NBT classes.
  */
-final class NBTConverter {
+public final class NBTConverter {
 
     private NBTConverter() {
     }

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/net/handler/WECUIPacketHandler.java

@@ -23,15 +23,9 @@ import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.fabric.FabricAdapter;
 import com.sk89q.worldedit.fabric.FabricPlayer;
 import com.sk89q.worldedit.fabric.FabricWorldEdit;
-import net.fabricmc.fabric.api.network.PacketConsumer;
-import net.fabricmc.fabric.api.network.PacketContext;
 import net.fabricmc.fabric.api.network.ServerSidePacketRegistry;
-import net.minecraft.client.MinecraftClient;
-import net.minecraft.client.network.packet.CustomPayloadS2CPacket;
 import net.minecraft.server.network.ServerPlayerEntity;
-import net.minecraft.server.network.packet.CustomPayloadC2SPacket;
 import net.minecraft.util.Identifier;
-import net.minecraft.util.PacketByteBuf;
 
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
@@ -58,4 +52,4 @@ public final class WECUIPacketHandler {
             session.describeCUI(actor);
         });
     }
-}
+}

worldedit-forge/build.gradle.kts

@@ -77,7 +77,12 @@ tasks.named<Copy>("processResources") {
     }
 }
 
-addJarManifest(includeClasspath = false)
+tasks.named<Jar>("jar") {
+    manifest {
+        attributes("Class-Path" to CLASSPATH,
+                "WorldEdit-Version" to project.version)
+    }
+}
 
 tasks.named<ShadowJar>("shadowJar") {
     dependencies {

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

@@ -25,6 +25,7 @@ import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.entity.metadata.EntityProperties;
 import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.forge.internal.NBTConverter;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.world.NullWorld;

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

@@ -27,6 +27,7 @@ import com.sk89q.worldedit.extension.platform.Actor;
 import com.sk89q.worldedit.extension.platform.Capability;
 import com.sk89q.worldedit.extension.platform.MultiUserPlatform;
 import com.sk89q.worldedit.extension.platform.Preference;
+import com.sk89q.worldedit.util.SideEffect;
 import com.sk89q.worldedit.world.DataFixer;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.registry.Registries;
@@ -206,6 +207,18 @@ class ForgePlatform extends AbstractPlatform implements MultiUserPlatform {
         return capabilities;
     }
 
+    private static final Set<SideEffect> SUPPORTED_SIDE_EFFECTS = Sets.immutableEnumSet(
+            SideEffect.VALIDATION,
+            SideEffect.ENTITY_AI,
+            SideEffect.LIGHTING,
+            SideEffect.NEIGHBORS
+    );
+
+    @Override
+    public Set<SideEffect> getSupportedSideEffects() {
+        return SUPPORTED_SIDE_EFFECTS;
+    }
+
     @Override
     public Collection<Actor> getConnectedUsers() {
         List<Actor> users = new ArrayList<>();

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

@@ -32,6 +32,9 @@ import com.sk89q.worldedit.blocks.BaseItem;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
+import com.sk89q.worldedit.forge.internal.ForgeWorldNativeAccess;
+import com.sk89q.worldedit.forge.internal.NBTConverter;
+import com.sk89q.worldedit.forge.internal.TileEntityUtils;
 import com.sk89q.worldedit.internal.Constants;
 import com.sk89q.worldedit.internal.block.BlockStateIdAccess;
 import com.sk89q.worldedit.internal.util.BiomeMath;
@@ -96,6 +99,7 @@ import net.minecraft.world.gen.feature.SwampTreeFeature;
 import net.minecraft.world.gen.feature.TallTaigaTreeFeature;
 import net.minecraft.world.gen.feature.TreeFeature;
 
+import net.minecraft.world.server.ChunkHolder;
 import net.minecraft.world.server.ServerChunkProvider;
 import net.minecraft.world.server.ServerWorld;
 import net.minecraft.world.storage.SaveHandler;
@@ -125,13 +129,13 @@ import static com.google.common.base.Preconditions.checkNotNull;
 public class ForgeWorld extends AbstractWorld {
 
     private static final Random random = new Random();
-    private static final int UPDATE = 1, NOTIFY = 2;
 
     private static final net.minecraft.block.BlockState JUNGLE_LOG = Blocks.JUNGLE_LOG.getDefaultState();
     private static final net.minecraft.block.BlockState JUNGLE_LEAF = Blocks.JUNGLE_LEAVES.getDefaultState().with(LeavesBlock.PERSISTENT, Boolean.TRUE);
     private static final net.minecraft.block.BlockState JUNGLE_SHRUB = Blocks.OAK_LEAVES.getDefaultState().with(LeavesBlock.PERSISTENT, Boolean.TRUE);
-    
+
     private final WeakReference<World> worldRef;
+    private final ForgeWorldNativeAccess nativeAccess;
 
     /**
      * Construct a new world.
@@ -141,6 +145,7 @@ public class ForgeWorld extends AbstractWorld {
     ForgeWorld(World world) {
         checkNotNull(world);
         this.worldRef = new WeakReference<>(world);
+        this.nativeAccess = new ForgeWorldNativeAccess(worldRef);
     }
 
     /**
@@ -193,50 +198,14 @@ public class ForgeWorld extends AbstractWorld {
     }
 
     @Override
-    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, boolean notifyAndLight) throws WorldEditException {
-        checkNotNull(position);
-        checkNotNull(block);
-
-        World world = getWorldChecked();
-        int x = position.getBlockX();
-        int y = position.getBlockY();
-        int z = position.getBlockZ();
-
-        // First set the block
-        Chunk chunk = world.getChunk(x >> 4, z >> 4);
-        BlockPos pos = new BlockPos(x, y, z);
-        net.minecraft.block.BlockState old = chunk.getBlockState(pos);
-        OptionalInt stateId = BlockStateIdAccess.getBlockStateId(block.toImmutableState());
-        net.minecraft.block.BlockState newState = stateId.isPresent() ? Block.getStateById(stateId.getAsInt()) : ForgeAdapter.adapt(block.toImmutableState());
-        net.minecraft.block.BlockState successState = chunk.setBlockState(pos, newState, false);
-        boolean successful = successState != null;
-
-        // Create the TileEntity
-        if (successful || old == newState) {
-            if (block instanceof BaseBlock) {
-                CompoundTag tag = ((BaseBlock) block).getNbtData();
-                if (tag != null) {
-                    CompoundNBT nativeTag = NBTConverter.toNative(tag);
-                    nativeTag.putString("id", ((BaseBlock) block).getNbtId());
-                    TileEntityUtils.setTileEntity(world, position, nativeTag);
-                    successful = true; // update if TE changed as well
-                }
-            }
-        }
-
-        if (successful && notifyAndLight) {
-            world.getChunkProvider().getLightManager().checkBlock(pos);
-            world.markAndNotifyBlock(pos, chunk, old, newState, UPDATE | NOTIFY);
-        }
-
-        return successful;
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
+        return nativeAccess.setBlock(position, block, sideEffects);
     }
 
     @Override
-    public boolean notifyAndLightBlock(BlockVector3 position, BlockState previousType) throws WorldEditException {
-        BlockPos pos = new BlockPos(position.getX(), position.getY(), position.getZ());
-        getWorld().notifyBlockUpdate(pos, ForgeAdapter.adapt(previousType), getWorld().getBlockState(pos), 1 | 2);
-        return true;
+    public Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet) throws WorldEditException {
+        nativeAccess.applySideEffects(position, previousType, sideEffectSet);
+        return Sets.intersection(ForgeWorldEdit.inst.getPlatform().getSupportedSideEffects(), sideEffectSet.getSideEffectsToApply());
     }
 
     @Override

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/internal/ForgeWorldNativeAccess.java

@@ -0,0 +1,152 @@
+/*
+ * 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.internal;
+
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.worldedit.forge.ForgeAdapter;
+import com.sk89q.worldedit.internal.block.BlockStateIdAccess;
+import com.sk89q.worldedit.internal.wna.WorldNativeAccess;
+import com.sk89q.worldedit.util.SideEffect;
+import com.sk89q.worldedit.util.SideEffectSet;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.nbt.CompoundNBT;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraft.world.server.ChunkHolder;
+import net.minecraft.world.server.ServerChunkProvider;
+
+import javax.annotation.Nullable;
+import java.lang.ref.WeakReference;
+import java.util.Objects;
+
+public class ForgeWorldNativeAccess implements WorldNativeAccess<Chunk, BlockState, BlockPos> {
+    private static final int UPDATE = 1, NOTIFY = 2;
+
+    private final WeakReference<World> world;
+    private SideEffectSet sideEffectSet;
+
+    public ForgeWorldNativeAccess(WeakReference<World> world) {
+        this.world = world;
+    }
+
+    private World getWorld() {
+        return Objects.requireNonNull(world.get(), "The reference to the world was lost");
+    }
+
+    @Override
+    public void setCurrentSideEffectSet(SideEffectSet sideEffectSet) {
+        this.sideEffectSet = sideEffectSet;
+    }
+
+    @Override
+    public Chunk getChunk(int x, int z) {
+        return getWorld().getChunk(x, z);
+    }
+
+    @Override
+    public BlockState toNative(com.sk89q.worldedit.world.block.BlockState state) {
+        int stateId = BlockStateIdAccess.getBlockStateId(state);
+        return BlockStateIdAccess.isValidInternalId(stateId)
+            ? Block.getStateById(stateId)
+            : ForgeAdapter.adapt(state);
+    }
+
+    @Override
+    public BlockState getBlockState(Chunk chunk, BlockPos position) {
+        return chunk.getBlockState(position);
+    }
+
+    @Nullable
+    @Override
+    public BlockState setBlockState(Chunk chunk, BlockPos position, BlockState state) {
+        return chunk.setBlockState(position, state, false);
+    }
+
+    @Override
+    public BlockState getValidBlockForPosition(BlockState block, BlockPos position) {
+        return Block.getValidBlockForPosition(block, getWorld(), position);
+    }
+
+    @Override
+    public BlockPos getPosition(int x, int y, int z) {
+        return new BlockPos(x, y, z);
+    }
+
+    @Override
+    public void updateLightingForBlock(BlockPos position) {
+        getWorld().getChunkProvider().getLightManager().checkBlock(position);
+    }
+
+    @Override
+    public boolean updateTileEntity(BlockPos position, CompoundTag tag) {
+        CompoundNBT nativeTag = NBTConverter.toNative(tag);
+        return TileEntityUtils.setTileEntity(getWorld(), position, nativeTag);
+    }
+
+    @Override
+    public void notifyBlockUpdate(BlockPos position, BlockState oldState, BlockState newState) {
+        getWorld().notifyBlockUpdate(position, oldState, newState, UPDATE | NOTIFY);
+    }
+
+    @Override
+    public boolean isChunkTicking(Chunk chunk) {
+        return chunk.getLocationType().isAtLeast(ChunkHolder.LocationType.TICKING);
+    }
+
+    @Override
+    public void markBlockChanged(BlockPos position) {
+        ((ServerChunkProvider) getWorld().getChunkProvider()).markBlockChanged(position);
+    }
+
+    @Override
+    public void notifyNeighbors(BlockPos pos, BlockState oldState, BlockState newState) {
+        World world = getWorld();
+        if (sideEffectSet.shouldApply(SideEffect.EVENTS)) {
+            world.notifyNeighbors(pos, oldState.getBlock());
+        } else {
+            // Manually update each side
+            Block block = oldState.getBlock();
+            world.neighborChanged(pos.west(), block, pos);
+            world.neighborChanged(pos.east(), block, pos);
+            world.neighborChanged(pos.down(), block, pos);
+            world.neighborChanged(pos.up(), block, pos);
+            world.neighborChanged(pos.north(), block, pos);
+            world.neighborChanged(pos.south(), block, pos);
+        }
+        if (newState.hasComparatorInputOverride()) {
+            world.updateComparatorOutputLevel(pos, newState.getBlock());
+        }
+    }
+
+    @Override
+    public void updateNeighbors(BlockPos pos, BlockState oldState, BlockState newState) {
+        World world = getWorld();
+        oldState.updateDiagonalNeighbors(world, pos, NOTIFY);
+        newState.updateNeighbors(world, pos, NOTIFY);
+        newState.updateDiagonalNeighbors(world, pos, NOTIFY);
+    }
+
+    @Override
+    public void onBlockStateChange(BlockPos pos, BlockState oldState, BlockState newState) {
+        getWorld().onBlockStateChange(pos, oldState, newState);
+    }
+}

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/internal/TileEntityUtils.java

@@ -24,13 +24,10 @@ import static com.google.common.base.Preconditions.checkNotNull;
 import com.sk89q.worldedit.math.BlockVector3;
 
 import net.minecraft.nbt.CompoundNBT;
-import net.minecraft.nbt.IntNBT;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 
-import javax.annotation.Nullable;
-
 /**
  * Utility methods for setting tile entities in the world.
  */
@@ -39,39 +36,21 @@ public final class TileEntityUtils {
     private TileEntityUtils() {
     }
 
-    /**
-     * Update the given tag compound with position information.
-     *
-     * @param tag the tag
-     * @param position the position
-     */
-    private static void updateForSet(CompoundNBT tag, BlockVector3 position) {
-        checkNotNull(tag);
-        checkNotNull(position);
-
-        tag.put("x", new IntNBT(position.getBlockX()));
-        tag.put("y", new IntNBT(position.getBlockY()));
-        tag.put("z", new IntNBT(position.getBlockZ()));
-    }
-
     /**
      * Set a tile entity at the given location using the tile entity ID from
      * the tag.
      *
      * @param world the world
      * @param position the position
-     * @param tag the tag for the tile entity (may be null to do nothing)
+     * @param tag the tag for the tile entity
      */
-    static boolean setTileEntity(World world, BlockVector3 position, @Nullable CompoundNBT tag) {
-        if (tag != null) {
-            updateForSet(tag, position);
-            TileEntity tileEntity = TileEntity.create(tag);
-            if (tileEntity == null) {
-                return false;
-            }
-            world.setTileEntity(new BlockPos(position.getBlockX(), position.getBlockY(), position.getBlockZ()), tileEntity);
-            return true;
+    static boolean setTileEntity(World world, BlockPos position, CompoundNBT tag) {
+        TileEntity tileEntity = TileEntity.create(tag);
+        if (tileEntity == null) {
+            return false;
         }
+        world.setTileEntity(new BlockPos(position.getX(), position.getY(), position.getZ()), tileEntity);
+        return true;
     }
 
     public static CompoundNBT copyNbtData(TileEntity tile) {

worldedit-sponge/src/main/java/com/sk89q/worldedit/sponge/SpongePlatform.java

@@ -20,6 +20,8 @@
 package com.sk89q.worldedit.sponge;
 
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.entity.Player;
 import com.sk89q.worldedit.event.platform.CommandEvent;
@@ -31,6 +33,7 @@ import com.sk89q.worldedit.extension.platform.MultiUserPlatform;
 import com.sk89q.worldedit.extension.platform.Preference;
 import com.sk89q.worldedit.internal.command.CommandUtil;
 import com.sk89q.worldedit.sponge.config.SpongeConfiguration;
+import com.sk89q.worldedit.util.SideEffect;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.registry.Registries;
 import org.enginehub.piston.Command;
@@ -50,6 +53,7 @@ import java.util.EnumMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
+import java.util.Set;
 
 import static java.util.stream.Collectors.toList;
 
@@ -192,6 +196,11 @@ class SpongePlatform extends AbstractPlatform implements MultiUserPlatform {
         return capabilities;
     }
 
+    @Override
+    public Set<SideEffect> getSupportedSideEffects() {
+        return ImmutableSet.of();
+    }
+
     @Override
     public Collection<Actor> getConnectedUsers() {
         List<Actor> users = new ArrayList<>();