add DefaultAllowedDataCycleBlocks to prevent NPE

Co-authored-by: zml2008

buildSrc/build.gradle.kts

@@ -52,11 +52,11 @@ dependencies {
     implementation("com.github.jengelman.gradle.plugins:shadow:5.2.0")
     implementation("net.ltgt.apt-eclipse:net.ltgt.apt-eclipse.gradle.plugin:0.21")
     implementation("net.ltgt.apt-idea:net.ltgt.apt-idea.gradle.plugin:0.21")
-    //implementation("org.jfrog.buildinfo:build-info-extractor-gradle:4.16.0")
+    implementation("org.jfrog.buildinfo:build-info-extractor-gradle:4.16.0")
-    //implementation("gradle.plugin.org.spongepowered:spongegradle:0.9.0")
+    implementation("gradle.plugin.org.spongepowered:spongegradle:0.9.0")
     //implementation("net.minecraftforge.gradle:ForgeGradle:3.0.181")
-    //implementation("net.fabricmc:fabric-loom:$loomVersion")
+    implementation("net.fabricmc:fabric-loom:$loomVersion")
-    //implementation("net.fabricmc:sponge-mixin:$mixinVersion")
+    implementation("net.fabricmc:sponge-mixin:$mixinVersion")
     implementation("gradle.plugin.com.mendhak.gradlecrowdin:plugin:0.1.0")
     implementation("org.enginehub.gradle:gradle-codecov-plugin:0.1.0")
 }

buildSrc/src/main/kotlin/PlatformConfig.kt

@@ -126,6 +126,18 @@ fun Project.applyShadowConfiguration() {
     }
 }
 
+fun Project.addJarManifest(includeClasspath: Boolean = false) {
+    tasks.named<Jar>("jar") {
+        val attributes = mutableMapOf(
+                "WorldEdit-Version" to project(":worldedit-core").version
+        )
+        if (includeClasspath) {
+            attributes["Class-Path"] = CLASSPATH
+        }
+        manifest.attributes(attributes)
+    }
+}
+
 val CLASSPATH = listOf("truezip", "truevfs", "js")
     .map { "$it.jar" }
     .flatMap { listOf(it, "WorldEdit/$it") }

gradle.properties

@@ -7,5 +7,5 @@ org.gradle.configureondemand=true
 org.gradle.parallel=true
 org.gradle.caching=true
 
-loom.version=0.2.6-20200124.104118-60
+loom.version=0.5.9
-mixin.version=0.8+build.17
+mixin.version=0.8.1+build.21

settings.gradle.kts

@@ -2,7 +2,7 @@ rootProject.name = "FastAsyncWorldEdit"
 
 include("worldedit-libs")
 
-listOf("bukkit", "core").forEach {
+listOf("bukkit", "core", "fabric").forEach {
     include("worldedit-libs:$it")
     include("worldedit-$it")
 }

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

@@ -342,6 +342,9 @@ public class BukkitWorld extends AbstractWorld {
     public boolean generateTree(TreeGenerator.TreeType type, EditSession editSession, BlockVector3 pt) {
         World world = getWorld();
         TreeType bukkitType = toBukkitTreeType(type);
+        if (bukkitType == TreeType.CHORUS_PLANT) {
+            pt = pt.add(0, 1, 0); // bukkit skips the feature gen which does this offset normally, so we have to add it back
+        }
         return type != null && world.generateTree(BukkitAdapter.adapt(world, pt), bukkitType,
                 new EditSessionBlockChangeDelegate(editSession));
     }

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

@@ -56,6 +56,7 @@ public abstract class LocalConfiguration {
     public boolean profile = false;
     public boolean traceUnflushedSessions = false;
     public Set<String> disallowedBlocks = new HashSet<>();
+    public Set<String> defaultAllowedDataCycleBlocks = new HashSet<>();
     protected BlockMask disallowedBlocksMask;
     public int defaultChangeLimit = -1;
     public int maxChangeLimit = -1;
@@ -168,6 +169,10 @@ public abstract class LocalConfiguration {
         return blockTypes.stream().filter(Objects::nonNull).map(BlockType::getId).toArray(String[]::new);
     }
 
+    protected String[] getDefaultAllowedDataCycleBlocks() {
+        return new String[0];
+    }
+
     /**
      * Load the configuration.
      */

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

@@ -19,18 +19,11 @@
 
 package com.sk89q.worldedit.extension.factory.parser;
 
-import com.boydti.fawe.config.Caption;
-import com.boydti.fawe.jnbt.JSON2NBT;
-import com.boydti.fawe.jnbt.NBTException;
-import com.boydti.fawe.util.MathMan;
-import com.boydti.fawe.util.StringMan;
 import com.google.common.collect.Maps;
-import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.IncompleteRegionException;
 import com.sk89q.worldedit.NotABlockException;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.WorldEditException;
-import com.sk89q.worldedit.blocks.BaseItem;
 import com.sk89q.worldedit.blocks.MobSpawnerBlock;
 import com.sk89q.worldedit.blocks.SignBlock;
 import com.sk89q.worldedit.blocks.SkullBlock;
@@ -42,17 +35,16 @@ import com.sk89q.worldedit.extension.input.NoMatchException;
 import com.sk89q.worldedit.extension.input.ParserContext;
 import com.sk89q.worldedit.extension.platform.Actor;
 import com.sk89q.worldedit.extension.platform.Capability;
-import com.sk89q.worldedit.extent.inventory.BlockBag;
-import com.sk89q.worldedit.extent.inventory.SlottableBlockBag;
 import com.sk89q.worldedit.internal.registry.InputParser;
+import com.sk89q.worldedit.internal.util.DeprecationUtil;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.registry.state.Property;
 import com.sk89q.worldedit.util.HandSide;
+import com.sk89q.worldedit.util.formatting.text.TextComponent;
+import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
 import com.sk89q.worldedit.world.World;
 import com.sk89q.worldedit.world.block.BaseBlock;
-import com.sk89q.worldedit.world.block.BlockCategories;
 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.block.BlockTypes;
 import com.sk89q.worldedit.world.block.FuzzyBlockState;
@@ -60,7 +52,6 @@ import com.sk89q.worldedit.world.entity.EntityType;
 import com.sk89q.worldedit.world.entity.EntityTypes;
 import com.sk89q.worldedit.world.registry.LegacyMapper;
 
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
@@ -80,12 +71,15 @@ public class DefaultBlockParser extends InputParser<BaseBlock> {
             try {
                 return ((Player) actor).getBlockInHand(handSide);
             } catch (NotABlockException e) {
-                throw new InputParseException("You're not holding a block!");
+                throw new InputParseException(e.getRichMessage());
             } catch (WorldEditException e) {
-                throw new InputParseException("Unknown error occurred: " + e.getMessage(), e);
+                throw new InputParseException(TranslatableComponent.of("worldedit.error.unknown", e.getRichMessage()), e);
             }
         } else {
-            throw new InputParseException("The user is not a player!");
+            throw new InputParseException(TranslatableComponent.of(
+                    "worldedit.error.parser.player-only",
+                    TextComponent.of(handSide == HandSide.MAIN_HAND ? "hand" : "offhand")
+            ));
         }
     }
 
@@ -113,7 +107,7 @@ public class DefaultBlockParser extends InputParser<BaseBlock> {
         }
     }
 
-    private static String[] EMPTY_STRING_ARRAY = {};
+    private static final String[] EMPTY_STRING_ARRAY = {};
 
     /**
      * Backwards compatibility for wool colours in block syntax.
@@ -166,7 +160,7 @@ public class DefaultBlockParser extends InputParser<BaseBlock> {
         }
     }
 
-    private static Map<Property<?>, Object> parseProperties(BlockType type, String[] stateProperties, ParserContext context) throws NoMatchException {
+    private static Map<Property<?>, Object> parseProperties(BlockType type, String[] stateProperties, ParserContext context) throws InputParseException {
         Map<Property<?>, Object> blockStates = new HashMap<>();
 
         if (stateProperties.length > 0) { // Block data not yet detected
@@ -175,35 +169,51 @@ public class DefaultBlockParser extends InputParser<BaseBlock> {
                 try {
                     String[] parts = parseableData.split("=");
                     if (parts.length != 2) {
-                        throw new NoMatchException("Bad state format in " + parseableData);
+                        throw new InputParseException(
+                                TranslatableComponent.of("worldedit.error.parser.bad-state-format",
+                                TextComponent.of(parseableData))
+                        );
                     }
 
                     @SuppressWarnings("unchecked")
                     Property<Object> propertyKey = (Property<Object>) type.getPropertyMap().get(parts[0]);
                     if (propertyKey == null) {
                         if (context.getActor() != null) {
-                            throw new NoMatchException("Unknown property " + parts[0] + " for block " + type.getId());
+                            throw new NoMatchException(TranslatableComponent.of(
+                                    "worldedit.error.parser.unknown-property",
+                                    TextComponent.of(parts[0]),
+                                    TextComponent.of(type.getId())
+                            ));
                         } else {
                             WorldEdit.logger.debug("Unknown property " + parts[0] + " for block " + type.getId());
                         }
                         return Maps.newHashMap();
                     }
                     if (blockStates.containsKey(propertyKey)) {
-                        throw new NoMatchException("Duplicate property " + parts[0]);
+                        throw new InputParseException(TranslatableComponent.of(
+                                "worldedit.error.parser.duplicate-property",
+                                TextComponent.of(parts[0])
+                        ));
                     }
                     Object value;
                     try {
                         value = propertyKey.getValueFor(parts[1]);
                     } catch (IllegalArgumentException e) {
-                        throw new NoMatchException("Unknown value " + parts[1] + " for state " + parts[0]);
+                        throw new NoMatchException(TranslatableComponent.of(
+                                "worldedit.error.parser.unknown-value",
+                                TextComponent.of(parts[1]),
+                                TextComponent.of(propertyKey.getName())
+                        ));
                     }
 
                     blockStates.put(propertyKey, value);
-                } catch (NoMatchException e) {
+                } catch (InputParseException e) {
                     throw e; // Pass-through
                 } catch (Exception e) {
-                    WorldEdit.logger.warn("Unknown state '" + parseableData + "'", e);
+                    throw new InputParseException(TranslatableComponent.of(
-                    throw new NoMatchException("Unknown state '" + parseableData + "'");
+                            "worldedit.error.parser.bad-state-format",
+                            TextComponent.of(parseableData)
+                    ));
                 }
             }
         }
@@ -232,9 +242,13 @@ public class DefaultBlockParser extends InputParser<BaseBlock> {
     }
 
     private BaseBlock parseLogic(String input, ParserContext context) throws InputParseException {
-        String[] blockAndExtraData = input.trim().split("\\|", 2);
+        BlockType blockType = null;
-        blockAndExtraData[0] = woolMapper(blockAndExtraData[0]);
         Map<Property<?>, Object> blockStates = new HashMap<>();
+        String[] blockAndExtraData = input.trim().split("\\|");
+        if (blockAndExtraData.length == 0) {
+            throw new NoMatchException(TranslatableComponent.of("worldedit.error.unknown-block", TextComponent.of(input)));
+        }
+        blockAndExtraData[0] = woolMapper(blockAndExtraData[0]);
 
         BlockState state = null;
 
@@ -243,31 +257,19 @@ public class DefaultBlockParser extends InputParser<BaseBlock> {
             try {
                 String[] split = blockAndExtraData[0].split(":", 2);
                 if (split.length == 0) {
-                    throw new InputParseException("Invalid colon.");
+                    throw new InputParseException(TranslatableComponent.of("worldedit.error.parser.invalid-colon"));
                 } else if (split.length == 1) {
                     state = LegacyMapper.getInstance().getBlockFromLegacy(Integer.parseInt(split[0]));
-                } else if (MathMan.isInteger(split[0])) {
-                    int id = Integer.parseInt(split[0]);
-                    int data = Integer.parseInt(split[1]);
-                    if (data < 0 || data >= 16) {
-                        throw new InputParseException("Invalid data " + data);
-                    }
-                    state = LegacyMapper.getInstance().getBlockFromLegacy(id, data);
                 } else {
-                    BlockType type = BlockTypes.get(split[0].toLowerCase(Locale.ROOT));
+                    state = LegacyMapper.getInstance().getBlockFromLegacy(Integer.parseInt(split[0]), Integer.parseInt(split[1]));
-                    if (type != null) {
-                        int data = Integer.parseInt(split[1]);
-                        if (data < 0 || data >= 16) {
-                            throw new InputParseException("Invalid data " + data);
-                        }
-                        state = LegacyMapper.getInstance().getBlockFromLegacy(type.getLegacyCombinedId() >> 4, data);
                 }
+                if (state != null) {
+                    blockType = state.getBlockType();
                 }
             } catch (NumberFormatException ignored) {
             }
         }
 
-        CompoundTag nbt = null;
         if (state == null) {
             String typeString;
             String stateString = null;
@@ -277,91 +279,79 @@ public class DefaultBlockParser extends InputParser<BaseBlock> {
             } else {
                 typeString = blockAndExtraData[0].substring(0, stateStart);
                 if (stateStart + 1 >= blockAndExtraData[0].length()) {
-                    throw new InputParseException("Invalid format. Hanging bracket @ " + stateStart + ".");
+                    throw new InputParseException(TranslatableComponent.of("worldedit.error.parser.hanging-lbracket", TextComponent.of(stateStart)));
                 }
                 int stateEnd = blockAndExtraData[0].lastIndexOf(']');
                 if (stateEnd < 0) {
-                    throw new InputParseException("Invalid format. Unclosed property.");
+                    throw new InputParseException(TranslatableComponent.of("worldedit.error.parser.missing-rbracket"));
                 }
                 stateString = blockAndExtraData[0].substring(stateStart + 1, blockAndExtraData[0].length() - 1);
             }
+            if (typeString.isEmpty()) {
+                throw new InputParseException(TranslatableComponent.of(
+                        "worldedit.error.parser.bad-state-format",
+                        TextComponent.of(blockAndExtraData[0])
+                ));
+            }
             String[] stateProperties = EMPTY_STRING_ARRAY;
             if (stateString != null) {
                 stateProperties = stateString.split(",");
             }
-            if (typeString.isEmpty()) {
+
-                throw new InputParseException("Invalid format");
-            }
             if ("hand".equalsIgnoreCase(typeString)) {
                 // Get the block type from the item in the user's hand.
                 final BaseBlock blockInHand = getBlockInHand(context.requireActor(), HandSide.MAIN_HAND);
-                state = blockInHand.toBlockState();
+                if (blockInHand.getClass() != BaseBlock.class) {
-                nbt = blockInHand.getNbtData();
+                    return blockInHand;
+                }
+
+                blockType = blockInHand.getBlockType();
+                blockStates.putAll(blockInHand.getStates());
             } else if ("offhand".equalsIgnoreCase(typeString)) {
                 // Get the block type from the item in the user's off hand.
                 final BaseBlock blockInHand = getBlockInHand(context.requireActor(), HandSide.OFF_HAND);
-                state = blockInHand.toBlockState();
+                if (blockInHand.getClass() != BaseBlock.class) {
-                nbt = blockInHand.getNbtData();
+                    return blockInHand;
-            } else if (typeString.matches("pos[0-9]+")) {
+                }
-                int index = Integer.parseInt(typeString.replaceAll("[a-z]+", ""));
+
+                blockType = blockInHand.getBlockType();
+                blockStates.putAll(blockInHand.getStates());
+            } else if ("pos1".equalsIgnoreCase(typeString)) {
                 // Get the block type from the "primary position"
                 final World world = context.requireWorld();
                 final BlockVector3 primaryPosition;
                 try {
-                    primaryPosition = context.requireSession().getRegionSelector(world).getVertices().get(index - 1);
+                    primaryPosition = context.requireSession().getRegionSelector(world).getPrimaryPosition();
                 } catch (IncompleteRegionException e) {
-                    throw new InputParseException("Your selection is not complete.");
+                    throw new InputParseException(TranslatableComponent.of("worldedit.error.incomplete-region"));
                 }
-                state = world.getBlock(primaryPosition);
+                final BlockState blockInHand = world.getBlock(primaryPosition);
-            } else if (typeString.matches("slot[0-9]+")) {
-                int slot = Integer.parseInt(typeString.substring(4)) - 1;
-                Actor actor = context.requireActor();
-                if (!(actor instanceof Player)) {
-                    throw new InputParseException("The user is not a player!");
-                }
-                Player player = (Player) actor;
-                BlockBag bag = player.getInventoryBlockBag();
-                if (!(bag instanceof SlottableBlockBag)) {
-                    throw new InputParseException("Unsupported!");
-                }
-                SlottableBlockBag slottable = (SlottableBlockBag) bag;
-                BaseItem item = slottable.getItem(slot);
 
-                if (!item.getType().hasBlockType()) {
+                blockType = blockInHand.getBlockType();
-                    throw new InputParseException("You're not holding a block!");
+                blockStates.putAll(blockInHand.getStates());
-                }
-                state = item.getType().getBlockType().getDefaultState();
-                nbt = item.getNbtData();
             } else {
-                BlockType type = BlockTypes.parse(typeString.toLowerCase(Locale.ROOT));
+                // Attempt to lookup a block from ID or name.
-
+                blockType = BlockTypes.get(typeString.toLowerCase(Locale.ROOT));
-                if (type != null) {
-                    state = type.getDefaultState();
-                }
-                if (state == null) {
-                    throw new NoMatchException(
-                        "Does not match a valid block type: '" + input + "'");
-                }
-            }
-            if (nbt == null) {
-                nbt = state.getNbtData();
             }
 
-            blockStates.putAll(parseProperties(state.getBlockType(), stateProperties, context));
+            if (blockType == null) {
+                throw new NoMatchException(TranslatableComponent.of("worldedit.error.unknown-block", TextComponent.of(input)));
+            }
+
+            blockStates.putAll(parseProperties(blockType, stateProperties, context));
+
             if (context.isPreferringWildcard()) {
-                if (stateString == null || stateString.isEmpty()) {
-                    state = new FuzzyBlockState(state);
-                } else {
                 FuzzyBlockState.Builder fuzzyBuilder = FuzzyBlockState.builder();
-                    fuzzyBuilder.type(state.getBlockType());
+                fuzzyBuilder.type(blockType);
                 for (Map.Entry<Property<?>, Object> blockState : blockStates.entrySet()) {
                     @SuppressWarnings("unchecked")
                     Property<Object> objProp = (Property<Object>) blockState.getKey();
                     fuzzyBuilder.withProperty(objProp, blockState.getValue());
                 }
                 state = fuzzyBuilder.build();
-                }
             } else {
+                // No wildcards allowed => eliminate them. (Start with default state)
+                state = blockType.getDefaultState();
                 for (Map.Entry<Property<?>, Object> blockState : blockStates.entrySet()) {
                     @SuppressWarnings("unchecked")
                     Property<Object> objProp = (Property<Object>) blockState.getKey();
@@ -370,87 +360,60 @@ public class DefaultBlockParser extends InputParser<BaseBlock> {
             }
         }
         // this should be impossible but IntelliJ isn't that smart
-        if (state == null) {
+        if (blockType == null) {
-            throw new NoMatchException("Does not match a valid block type: '" + input + "'");
+            throw new NoMatchException(TranslatableComponent.of("worldedit.error.unknown-block", TextComponent.of(input)));
-        }
-
-        if (blockAndExtraData.length > 1 && blockAndExtraData[1].startsWith("{")) {
-            String joined = StringMan.join(Arrays.copyOfRange(blockAndExtraData, 1, blockAndExtraData.length), "|");
-            try {
-                nbt = JSON2NBT.getTagFromJson(joined);
-            } catch (NBTException e) {
-                throw new NoMatchException(e.getMessage());
-            }
         }
 
         // Check if the item is allowed
-        BlockType blockType = state.getBlockType();
-
         if (context.isRestricted()) {
             Actor actor = context.requireActor();
             if (actor != null && !actor.hasPermission("worldedit.anyblock")
                     && worldEdit.getConfiguration().disallowedBlocks.contains(blockType.getId())) {
-                throw new DisallowedUsageException("You are not allowed to use '" + input + "'");
+                throw new DisallowedUsageException(TranslatableComponent.of("worldedit.error.disallowed-block", TextComponent.of(input)));
             }
         }
 
-        if (nbt != null) {
+        if (!context.isTryingLegacy()) {
-            return validate(context, state.toBaseBlock(nbt));
+            return state.toBaseBlock();
         }
 
-        if (blockType == BlockTypes.SIGN || blockType == BlockTypes.WALL_SIGN
+        if (DeprecationUtil.isSign(blockType)) {
-                || BlockCategories.SIGNS.contains(blockType)) {
             // Allow special sign text syntax
             String[] text = new String[4];
             text[0] = blockAndExtraData.length > 1 ? blockAndExtraData[1] : "";
             text[1] = blockAndExtraData.length > 2 ? blockAndExtraData[2] : "";
             text[2] = blockAndExtraData.length > 3 ? blockAndExtraData[3] : "";
             text[3] = blockAndExtraData.length > 4 ? blockAndExtraData[4] : "";
-            return validate(context, new SignBlock(state, text));
+            return new SignBlock(state, text);
         } else if (blockType == BlockTypes.SPAWNER) {
             // Allow setting mob spawn type
             if (blockAndExtraData.length > 1) {
                 String mobName = blockAndExtraData[1];
                 EntityType ent = EntityTypes.get(mobName.toLowerCase(Locale.ROOT));
                 if (ent == null) {
-                    throw new NoMatchException("Unknown entity type '" + mobName + "'");
+                    throw new NoMatchException(TranslatableComponent.of("worldedit.error.unknown-entity", TextComponent.of(mobName)));
                 }
                 mobName = ent.getId();
                 if (!worldEdit.getPlatformManager().queryCapability(Capability.USER_COMMANDS).isValidMobType(mobName)) {
-                    throw new NoMatchException("Unknown mob type '" + mobName + "'");
+                    throw new NoMatchException(TranslatableComponent.of("worldedit.error.unknown-mob", TextComponent.of(mobName)));
                 }
-                return validate(context, new MobSpawnerBlock(state, mobName));
+                return new MobSpawnerBlock(state, mobName);
             } else {
                 //noinspection ConstantConditions
-                return validate(context, new MobSpawnerBlock(state, EntityTypes.PIG.getId()));
+                return new MobSpawnerBlock(state, EntityTypes.PIG.getId());
             }
         } else if (blockType == BlockTypes.PLAYER_HEAD || blockType == BlockTypes.PLAYER_WALL_HEAD) {
             // allow setting type/player/rotation
             if (blockAndExtraData.length <= 1) {
-                return validate(context, new SkullBlock(state));
+                return new SkullBlock(state);
             }
 
             String type = blockAndExtraData[1];
 
-            return validate(context, new SkullBlock(state, type.replace(" ", "_"))); // valid MC usernames
+            return new SkullBlock(state, type.replace(" ", "_")); // valid MC usernames
         } else {
-            return validate(context, state.toBaseBlock());
+            return state.toBaseBlock();
         }
     }
 
-    private <T extends BlockStateHolder> T validate(ParserContext context, T holder) {
-        if (context.isRestricted()) {
-            Actor actor = context.requireActor();
-            if (!actor.hasPermission("worldedit.anyblock") && worldEdit.getConfiguration().checkDisallowedBlocks(holder)) {
-                throw new DisallowedUsageException(Caption.toString(Caption.of("fawe.error.block.not.allowed", holder)));
-            }
-            CompoundTag nbt = holder.getNbtData();
-            if (nbt != null) {
-                if (!actor.hasPermission("worldedit.anyblock")) {
-                    throw new DisallowedUsageException("You are not allowed to use nbt'");
-                }
-            }
-        }
-        return holder;
-    }
 }

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

@@ -91,7 +91,7 @@ public class PropertiesConfiguration extends LocalConfiguration {
         disallowedBlocks = getStringSet("disallowed-blocks", getDefaultDisallowedBlocks());
         disallowedBlocksMask = null;
         allowedDataCycleBlocks =
-                new HashSet<>(getStringSet("limits.allowed-data-cycle-blocks", null));
+                new HashSet<>(getStringSet("limits.allowed-data-cycle-blocks", getDefaultAllowedDataCycleBlocks()));
         defaultChangeLimit = getInt("default-max-changed-blocks", defaultChangeLimit);
         maxChangeLimit = getInt("max-changed-blocks", maxChangeLimit);
         defaultVerticalHeight = getInt("default-vertical-height", defaultVerticalHeight);

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

@@ -40,7 +40,7 @@ import javax.annotation.Nullable;
 /**
  * Tree generator.
  */
-public class TreeGenerator {
+public final class TreeGenerator {
 
     public enum TreeType {
         TREE("Oak tree", "oak", "tree", "regular"),
@@ -82,10 +82,12 @@ public class TreeGenerator {
         JUNGLE_BUSH("Jungle bush", "junglebush", "jungleshrub"),
         RED_MUSHROOM("Red mushroom", "redmushroom", "redgiantmushroom"),
         BROWN_MUSHROOM("Brown mushroom", "brownmushroom", "browngiantmushroom"),
+        CRIMSON_FUNGUS("Crimson fungus", "crimsonfungus", "rednethermushroom"),
+        WARPED_FUNGUS("Warped fungus", "warpedfungus", "greennethermushroom"),
         RANDOM_MUSHROOM("Random mushroom", "randmushroom", "randommushroom") {
             @Override
             public boolean generate(EditSession editSession, BlockVector3 pos) throws MaxChangedBlocksException {
-                TreeType[] choices = { RED_MUSHROOM, BROWN_MUSHROOM };
+                TreeType[] choices = { RED_MUSHROOM, BROWN_MUSHROOM, CRIMSON_FUNGUS, WARPED_FUNGUS };
                 return choices[TreeGenerator.RANDOM.nextInt(choices.length)].generate(editSession, pos);
             }
         },
@@ -99,6 +101,13 @@ public class TreeGenerator {
                 return true;
             }
         },
+        CHORUS_PLANT("Chorus plant", "chorusplant") {
+            @Override
+            public boolean generate(EditSession editSession, BlockVector3 pos) throws MaxChangedBlocksException {
+                // chorus plants have to generate starting in the end stone itself, not the air above the ground
+                return editSession.getWorld().generateTree(this, editSession, pos.subtract(0, 1, 0));
+            }
+        },
         RANDOM("Random tree", "rand", "random") {
             @Override
             public boolean generate(EditSession editSession, BlockVector3 pos) throws MaxChangedBlocksException {

worldedit-fabric/build.gradle.kts

@@ -1,15 +1,33 @@
 import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+import net.fabricmc.loom.LoomGradleExtension
 import net.fabricmc.loom.task.RemapJarTask
 
+buildscript {
+    repositories {
+        mavenCentral()
+        maven {
+            name = "Fabric"
+            url = uri("https://maven.fabricmc.net/")
+        }
+    }
+    dependencies {
+        classpath("net.fabricmc:fabric-loom:${versions.loom}")
+    }
+}
+
 applyPlatformAndCoreConfiguration()
 applyShadowConfiguration()
 
 apply(plugin = "fabric-loom")
 apply(plugin = "java-library")
 
-val minecraftVersion = "1.15.2"
+configure<LoomGradleExtension> {
-val yarnMappings = "1.15.2+build.14:v2"
+    accessWidener("src/main/resources/worldedit.accesswidener")
-val loaderVersion = "0.7.8+build.189"
+}
+
+val minecraftVersion = "1.16.3"
+val yarnMappings = "1.16.3+build.1:v2"
+val loaderVersion = "0.9.3+build.207"
 
 configurations.all {
     resolutionStrategy {
@@ -17,30 +35,74 @@ configurations.all {
     }
 }
 
+val fabricApiConfiguration: Configuration = configurations.create("fabricApi")
+
+repositories {
+    maven {
+        name = "Fabric"
+        url = uri("https://maven.fabricmc.net/")
+    }
+}
+
 dependencies {
-    "compile"(project(":worldedit-core"))
+    "api"(project(":worldedit-core"))
-    "compile"("org.apache.logging.log4j:log4j-slf4j-impl:2.8.1")
+    "implementation"("org.apache.logging.log4j:log4j-slf4j-impl:2.8.1")
 
     "minecraft"("com.mojang:minecraft:$minecraftVersion")
     "mappings"("net.fabricmc:yarn:$yarnMappings")
-    "modCompile"("net.fabricmc:fabric-loader:$loaderVersion")
+    "modImplementation"("net.fabricmc:fabric-loader:$loaderVersion")
 
-    listOf(
+    // [1] declare fabric-api dependency...
-        "net.fabricmc.fabric-api:fabric-api-base:0.1.2+28f8190f42",
+    "fabricApi"("net.fabricmc.fabric-api:fabric-api:0.20.2+build.402-1.16")
-        "net.fabricmc.fabric-api:fabric-events-interaction-v0:0.2.6+12515ed975",
+
-        "net.fabricmc.fabric-api:fabric-events-lifecycle-v0:0.1.2+b7f9825de8",
+    // [2] Load the API dependencies from the fabric mod json...
-        "net.fabricmc.fabric-api:fabric-networking-v0:0.1.7+12515ed975"
+    @Suppress("UNCHECKED_CAST")
-    ).forEach {
+    val fabricModJson = file("src/main/resources/fabric.mod.json").bufferedReader().use {
+        groovy.json.JsonSlurper().parse(it) as Map<String, Map<String, *>>
+    }
+    val wantedDependencies = (fabricModJson["depends"] ?: error("no depends in fabric.mod.json")).keys
+        .filter { it == "fabric-api-base" || it.contains(Regex("v\\d$")) }
+        .map { "net.fabricmc.fabric-api:$it" }
+    logger.lifecycle("Looking for these dependencies:")
+    for (wantedDependency in wantedDependencies) {
+        logger.lifecycle(wantedDependency)
+    }
+    // [3] and now we resolve it to pick out what we want :D
+    val fabricApiDependencies = fabricApiConfiguration.incoming.resolutionResult.allDependencies
+        .onEach {
+            if (it is UnresolvedDependencyResult) {
+                throw kotlin.IllegalStateException("Failed to resolve Fabric API", it.failure)
+            }
+        }
+        .filterIsInstance<ResolvedDependencyResult>()
+        // pick out transitive dependencies
+        .flatMap {
+            it.selected.dependencies
+        }
+        // grab the requested versions
+        .map { it.requested }
+        .filterIsInstance<ModuleComponentSelector>()
+        // map to standard notation
+        .associateByTo(
+            mutableMapOf(),
+            keySelector = { "${it.group}:${it.module}" },
+            valueTransform = { "${it.group}:${it.module}:${it.version}" }
+        )
+    fabricApiDependencies.keys.retainAll(wantedDependencies)
+    // sanity check
+    for (wantedDep in wantedDependencies) {
+        check(wantedDep in fabricApiDependencies) { "Fabric API library $wantedDep is missing!" }
+    }
+
+    fabricApiDependencies.values.forEach {
         "include"(it)
         "modImplementation"(it)
     }
 
     // Hook these up manually, because Fabric doesn't seem to quite do it properly.
-    "compileClasspath"("net.fabricmc:sponge-mixin:${project.versions.mixin}")
+    "compileOnly"("net.fabricmc:sponge-mixin:${project.versions.mixin}")
     "annotationProcessor"("net.fabricmc:sponge-mixin:${project.versions.mixin}")
     "annotationProcessor"("net.fabricmc:fabric-loom:${project.versions.loom}")
-
-    "testCompile"("org.mockito:mockito-core:1.9.0-rc1")
 }
 
 configure<BasePluginConvention> {
@@ -62,15 +124,10 @@ tasks.named<Copy>("processResources") {
     }
 }
 
-tasks.named<Jar>("jar") {
+addJarManifest(includeClasspath = true)
-    manifest {
-        attributes("Class-Path" to CLASSPATH,
-                   "WorldEdit-Version" to project.version)
-    }
-}
 
 tasks.named<ShadowJar>("shadowJar") {
-    archiveClassifier.set("dist-dev")
+    archiveFileName.set(archiveFileName.get().substringBeforeLast('.') + "-dev.jar")
     dependencies {
         relocate("org.slf4j", "com.sk89q.worldedit.slf4j")
         relocate("org.apache.logging.slf4j", "com.sk89q.worldedit.log4jbridge")
@@ -97,6 +154,7 @@ tasks.register<RemapJarTask>("remapShadowJar") {
     input.set(shadowJar.archiveFile)
     archiveFileName.set(shadowJar.archiveFileName.get().replace(Regex("-dev\\.jar$"), ".jar"))
     addNestedDependencies.set(true)
+    remapAccessWidener.set(true)
 }
 
 tasks.named("assemble").configure {

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

@@ -19,10 +19,6 @@
 
 package com.sk89q.worldedit.fabric;
 
-import static com.sk89q.worldedit.fabric.FabricAdapter.adaptPlayer;
-import static net.minecraft.server.command.CommandManager.argument;
-import static net.minecraft.server.command.CommandManager.literal;
-
 import com.google.common.collect.ImmutableList;
 import com.mojang.brigadier.Command;
 import com.mojang.brigadier.CommandDispatcher;
@@ -50,6 +46,10 @@ import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.function.Predicate;
 
+import static com.sk89q.worldedit.fabric.FabricAdapter.adaptPlayer;
+import static net.minecraft.server.command.CommandManager.argument;
+import static net.minecraft.server.command.CommandManager.literal;
+
 
 public final class CommandWrapper {
 
@@ -60,8 +60,7 @@ public final class CommandWrapper {
         ImmutableList.Builder<String> aliases = ImmutableList.builder();
         aliases.add(command.getName()).addAll(command.getAliases());
 
-        Command<ServerCommandSource> commandRunner =
+        Command<ServerCommandSource> commandRunner = ctx -> {
-                ctx -> {
             WorldEdit.getInstance().getEventBus().post(new com.sk89q.worldedit.event.platform.CommandEvent(
                 adaptPlayer(ctx.getSource().getPlayer()),
                 ctx.getInput()

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

@@ -19,8 +19,6 @@
 
 package com.sk89q.worldedit.fabric;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-
 import com.google.common.collect.ImmutableList;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.Tag;
@@ -45,8 +43,9 @@ import com.sk89q.worldedit.world.item.ItemTypes;
 import net.minecraft.block.Block;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.network.ServerPlayerEntity;
-import net.minecraft.state.StateFactory;
+import net.minecraft.state.StateManager;
 import net.minecraft.state.property.DirectionProperty;
 import net.minecraft.util.Identifier;
 import net.minecraft.util.StringIdentifiable;
@@ -57,11 +56,26 @@ import net.minecraft.world.biome.Biome;
 
 import java.util.Comparator;
 import java.util.Map;
+import java.util.Objects;
 import java.util.TreeMap;
 import java.util.stream.Collectors;
+import javax.annotation.Nullable;
+
+import static com.google.common.base.Preconditions.checkNotNull;
 
 public final class FabricAdapter {
 
+    @Nullable
+    private static MinecraftServer server;
+
+    private static MinecraftServer requireServer() {
+        return Objects.requireNonNull(server, "No server injected");
+    }
+
+    static void setServer(@Nullable MinecraftServer server) {
+        FabricAdapter.server = server;
+    }
+
     private FabricAdapter() {
     }
 
@@ -70,11 +84,16 @@ public final class FabricAdapter {
     }
 
     public static Biome adapt(BiomeType biomeType) {
-        return Registry.BIOME.get(new Identifier(biomeType.getId()));
+        return requireServer()
+            .getRegistryManager()
+            .get(Registry.BIOME_KEY)
+            .get(new Identifier(biomeType.getId()));
     }
 
     public static BiomeType adapt(Biome biome) {
-        return BiomeTypes.get(Registry.BIOME.getId(biome).toString());
+        Identifier id = requireServer().getRegistryManager().get(Registry.BIOME_KEY).getId(biome);
+        Objects.requireNonNull(id, "biome is not registered");
+        return BiomeTypes.get(id.toString());
     }
 
     public static Vector3 adapt(Vec3d vector) {
@@ -102,7 +121,10 @@ public final class FabricAdapter {
         }
     }
 
-    public static Direction adaptEnumFacing(net.minecraft.util.math.Direction face) {
+    public static Direction adaptEnumFacing(@Nullable net.minecraft.util.math.Direction face) {
+        if (face == null) {
+            return null;
+        }
         switch (face) {
             case NORTH: return Direction.NORTH;
             case SOUTH: return Direction.SOUTH;
@@ -155,7 +177,8 @@ public final class FabricAdapter {
         return props;
     }
 
-    private static net.minecraft.block.BlockState applyProperties(StateFactory<Block, net.minecraft.block.BlockState> stateContainer,
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    private static net.minecraft.block.BlockState applyProperties(StateManager<Block, net.minecraft.block.BlockState> stateContainer,
                                                                   net.minecraft.block.BlockState newState, Map<Property<?>, Object> states) {
         for (Map.Entry<Property<?>, Object> state : states.entrySet()) {
             net.minecraft.state.property.Property property = stateContainer.getProperty(state.getKey().getName());
@@ -166,7 +189,7 @@ public final class FabricAdapter {
                 value = adapt(dir);
             } else if (property instanceof net.minecraft.state.property.EnumProperty) {
                 String enumName = (String) value;
-                value = ((net.minecraft.state.property.EnumProperty<?>) property).getValue((String) value).orElseGet(() -> {
+                value = ((net.minecraft.state.property.EnumProperty<?>) property).parse((String) value).orElseGet(() -> {
                     throw new IllegalStateException("Enum property " + property.getName() + " does not contain " + enumName);
                 });
             }
@@ -180,7 +203,7 @@ public final class FabricAdapter {
         Block mcBlock = adapt(blockState.getBlockType());
         net.minecraft.block.BlockState newState = mcBlock.getDefaultState();
         Map<Property<?>, Object> states = blockState.getStates();
-        return applyProperties(mcBlock.getStateFactory(), newState, states);
+        return applyProperties(mcBlock.getStateManager(), newState, states);
     }
 
     public static BlockState adapt(net.minecraft.block.BlockState blockState) {

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

@@ -19,39 +19,45 @@
 
 package com.sk89q.worldedit.fabric;
 
+import com.sk89q.worldedit.util.formatting.text.Component;
+import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
 import com.sk89q.worldedit.world.biome.BiomeData;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.registry.BiomeRegistry;
-import net.minecraft.world.biome.Biome;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.Util;
 
 /**
  * Provides access to biome data in Fabric.
  */
 class FabricBiomeRegistry implements BiomeRegistry {
 
+    @Deprecated
     @Override
     public BiomeData getData(BiomeType biome) {
-        return new FabricBiomeData(FabricAdapter.adapt(biome));
+        return new FabricBiomeData(biome);
     }
 
     /**
      * Cached biome data information.
      */
+    @Deprecated
     private static class FabricBiomeData implements BiomeData {
-        private final Biome biome;
+        private final BiomeType biome;
 
         /**
          * Create a new instance.
          *
          * @param biome the base biome
          */
-        private FabricBiomeData(Biome biome) {
+        private FabricBiomeData(BiomeType biome) {
             this.biome = biome;
         }
 
+        @SuppressWarnings("deprecation")
         @Override
         public String getName() {
-            return biome.getName().asFormattedString();
+            return biome.getId();
         }
     }
 

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

@@ -33,8 +33,11 @@ import java.util.stream.Collectors;
 public class FabricBlockCategoryRegistry implements BlockCategoryRegistry {
     @Override
     public Set<BlockType> getCategorisedByName(String category) {
-        return Optional.ofNullable(BlockTags.getContainer().get(new Identifier(category)))
+        return Optional.ofNullable(BlockTags.getTagGroup().getTag(new Identifier(category)))
-                .map(Tag::values).orElse(Collections.emptySet())
+            .map(Tag::values)
-                .stream().map(FabricAdapter::adapt).collect(Collectors.toSet());
+            .orElse(Collections.emptyList())
+            .stream()
+            .map(FabricAdapter::adapt)
+            .collect(Collectors.toSet());
     }
 }

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

@@ -21,6 +21,7 @@ package com.sk89q.worldedit.fabric;
 
 import com.sk89q.worldedit.world.registry.BlockMaterial;
 import com.sk89q.worldedit.world.registry.PassthroughBlockMaterial;
+import net.minecraft.block.BlockState;
 import net.minecraft.block.Material;
 import net.minecraft.block.piston.PistonBehavior;
 
@@ -34,10 +35,12 @@ import javax.annotation.Nullable;
 public class FabricBlockMaterial extends PassthroughBlockMaterial {
 
     private final Material delegate;
+    private final BlockState block;
 
-    public FabricBlockMaterial(Material delegate, @Nullable BlockMaterial secondary) {
+    public FabricBlockMaterial(Material delegate, BlockState block, @Nullable BlockMaterial secondary) {
         super(secondary);
         this.delegate = delegate;
+        this.block = block;
     }
 
     @Override
@@ -82,7 +85,7 @@ public class FabricBlockMaterial extends PassthroughBlockMaterial {
 
     @Override
     public boolean isToolRequired() {
-        return !delegate.canBreakByHand();
+        return block.isToolRequired();
     }
 
     @Override

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

@@ -20,16 +20,13 @@
 package com.sk89q.worldedit.fabric;
 
 import com.sk89q.worldedit.registry.state.Property;
+import com.sk89q.worldedit.util.formatting.text.Component;
+import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
 import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockType;
 import com.sk89q.worldedit.world.registry.BlockMaterial;
 import com.sk89q.worldedit.world.registry.BundledBlockRegistry;
-import net.fabricmc.api.EnvType;
-import net.fabricmc.loader.api.FabricLoader;
 import net.minecraft.block.Block;
-import net.minecraft.block.Material;
-
-import javax.annotation.Nullable;
 
 import java.util.Collection;
 import java.util.HashMap;
@@ -39,24 +36,15 @@ import java.util.TreeMap;
 
 public class FabricBlockRegistry extends BundledBlockRegistry {
 
-    private Map<Material, FabricBlockMaterial> materialMap = new HashMap<>();
+    private final Map<net.minecraft.block.BlockState, FabricBlockMaterial> materialMap = new HashMap<>();
-
-    @Nullable
-    @Override
-    public String getName(BlockType blockType) {
-        Block block = FabricAdapter.adapt(blockType);
-        if (FabricLoader.getInstance().getEnvironmentType() == EnvType.CLIENT) {
-            return block.getName().asFormattedString();
-        } else {
-            return super.getName(blockType);
-        }
-    }
 
     @Override
     public BlockMaterial getMaterial(BlockType blockType) {
         Block block = FabricAdapter.adapt(blockType);
-        return materialMap.computeIfAbsent(block.getDefaultState().getMaterial(),
+        return materialMap.computeIfAbsent(
-                m -> new FabricBlockMaterial(m, super.getMaterial(blockType)));
+            block.getDefaultState(),
+            m -> new FabricBlockMaterial(m.getMaterial(), m, super.getMaterial(blockType))
+        );
     }
 
     @Override

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

@@ -21,7 +21,7 @@ package com.sk89q.worldedit.fabric;
 
 import com.sk89q.worldedit.util.PropertiesConfiguration;
 
-import java.io.File;
+import java.nio.file.Path;
 
 public class FabricConfiguration extends PropertiesConfiguration {
 
@@ -29,7 +29,7 @@ public class FabricConfiguration extends PropertiesConfiguration {
     public boolean cheatMode = false;
 
     public FabricConfiguration(FabricWorldEdit mod) {
-        super(new File(mod.getWorkingDir(), "worldedit.properties"));
+        super(mod.getWorkingDir().resolve("worldedit.properties"));
     }
 
     @Override
@@ -39,7 +39,7 @@ public class FabricConfiguration extends PropertiesConfiguration {
     }
 
     @Override
-    public File getWorkingDirectory() {
+    public Path getWorkingDirectoryPath() {
         return FabricWorldEdit.inst.getWorkingDir();
     }
 }

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

@@ -33,18 +33,19 @@ import com.google.gson.JsonParseException;
 import com.mojang.datafixers.DSL.TypeReference;
 import com.mojang.datafixers.DataFixer;
 import com.mojang.datafixers.DataFixerBuilder;
-import com.mojang.datafixers.Dynamic;
 import com.mojang.datafixers.schemas.Schema;
+import com.mojang.serialization.Dynamic;
 import com.sk89q.jnbt.CompoundTag;
 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.NbtOps;
 import net.minecraft.nbt.StringTag;
 import net.minecraft.nbt.Tag;
 import net.minecraft.text.LiteralText;
+import net.minecraft.text.MutableText;
 import net.minecraft.text.Text;
 import net.minecraft.util.DyeColor;
 import net.minecraft.util.Identifier;
@@ -66,25 +67,28 @@ import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.Executor;
 import java.util.stream.Collectors;
-
 import javax.annotation.Nullable;
 
 /**
  * Handles converting all Pre 1.13.2 data using the Legacy DataFix System (ported to 1.13.2)
  *
+ * <p>
  * We register a DFU Fixer per Legacy Data Version and apply the fixes using legacy strategy
  * which is safer, faster and cleaner code.
+ * </p>
  *
+ * <p>
  * The pre DFU code did not fail when the Source version was unknown.
+ * </p>
  *
+ * <p>
  * This class also provides util methods for converting compounds to wrap the update call to
- * receive the source version in the compound
+ * receive the source version in the compound.
- *
+ * </p>
  */
-@SuppressWarnings("UnnecessarilyQualifiedStaticUsage")
+@SuppressWarnings({ "UnnecessarilyQualifiedStaticUsage", "unchecked", "rawtypes" })
 class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.world.DataFixer {
 
-    @SuppressWarnings("unchecked")
     @Override
     public <T> T fixUp(FixType<T> type, T original, int srcVer) {
         if (type == FixTypes.CHUNK) {
@@ -131,7 +135,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     private String nbtToState(net.minecraft.nbt.CompoundTag tagCompound) {
         StringBuilder sb = new StringBuilder();
         sb.append(tagCompound.getString("Name"));
-        if (tagCompound.containsKey("Properties", 10)) {
+        if (tagCompound.contains("Properties", 10)) {
             sb.append('[');
             net.minecraft.nbt.CompoundTag props = tagCompound.getCompound("Properties");
             sb.append(props.getKeys().stream().map(k -> k + "=" + props.getString(k).replace("\"", "")).collect(Collectors.joining(",")));
@@ -168,8 +172,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     }
 
     private static String fixName(String key, int srcVer, TypeReference type) {
-        return INSTANCE.fixer.update(type, new Dynamic<>(OPS_NBT, new StringTag(key)), srcVer, DATA_VERSION)
+        return INSTANCE.fixer.update(type, new Dynamic<>(OPS_NBT, StringTag.of(key)), srcVer, DATA_VERSION)
-                .asString().orElse(key);
+            .asString().result().orElse(key);
     }
 
     private static final NbtOps OPS_NBT = NbtOps.INSTANCE;
@@ -181,7 +185,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     private final Map<LegacyType, List<DataInspector>> inspectors = new EnumMap<>(LegacyType.class);
 
     // Set on build
-    private DataFixer fixer;
+    private final DataFixer fixer;
     private static final Map<String, LegacyType> DFU_TO_LEGACY = new HashMap<>();
 
     public enum LegacyType {
@@ -281,7 +285,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     }
 
     public static net.minecraft.nbt.CompoundTag convert(TypeReference type, net.minecraft.nbt.CompoundTag cmp) {
-        int i = cmp.containsKey("DataVersion", 99) ? cmp.getInt("DataVersion") : -1;
+        int i = cmp.contains("DataVersion", 99) ? cmp.getInt("DataVersion") : -1;
         return convert(type, cmp, i);
     }
 
@@ -460,6 +464,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     private void registerEntityItemListEquipment(String type) {
         registerEntityItemList(type, "ArmorItems", "HandItems");
     }
+
     private static final Map<String, Identifier> OLD_ID_TO_KEY_MAP = new HashMap<>();
 
     static {
@@ -587,17 +592,17 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     }
 
     private static void convertItem(net.minecraft.nbt.CompoundTag nbttagcompound, String key, int sourceVer, int targetVer) {
-        if (nbttagcompound.containsKey(key, 10)) {
+        if (nbttagcompound.contains(key, 10)) {
             convertCompound(LegacyType.ITEM_INSTANCE, nbttagcompound, key, sourceVer, targetVer);
         }
     }
 
     private static void convertItems(net.minecraft.nbt.CompoundTag nbttagcompound, String key, int sourceVer, int targetVer) {
-        if (nbttagcompound.containsKey(key, 9)) {
+        if (nbttagcompound.contains(key, 9)) {
             ListTag nbttaglist = nbttagcompound.getList(key, 10);
 
             for (int j = 0; j < nbttaglist.size(); ++j) {
-                nbttaglist.add(j, convert(LegacyType.ITEM_INSTANCE, nbttaglist.getCompoundTag(j), sourceVer, targetVer));
+                nbttaglist.add(j, convert(LegacyType.ITEM_INSTANCE, nbttaglist.getCompound(j), sourceVer, targetVer));
             }
         }
 
@@ -605,7 +610,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterEquipment implements DataConverter {
 
-        DataConverterEquipment() {}
+        DataConverterEquipment() {
+        }
 
         @Override
         public int getDataVersion() {
@@ -617,14 +623,14 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             ListTag nbttaglist = cmp.getList("Equipment", 10);
             ListTag nbttaglist1;
 
-            if (!nbttaglist.isEmpty() && !cmp.containsKey("HandItems", 10)) {
+            if (!nbttaglist.isEmpty() && !cmp.contains("HandItems", 10)) {
                 nbttaglist1 = new ListTag();
                 nbttaglist1.add(nbttaglist.get(0));
                 nbttaglist1.add(new net.minecraft.nbt.CompoundTag());
                 cmp.put("HandItems", nbttaglist1);
             }
 
-            if (nbttaglist.size() > 1 && !cmp.containsKey("ArmorItem", 10)) {
+            if (nbttaglist.size() > 1 && !cmp.contains("ArmorItem", 10)) {
                 nbttaglist1 = new ListTag();
                 nbttaglist1.add(nbttaglist.get(1));
                 nbttaglist1.add(nbttaglist.get(2));
@@ -634,23 +640,23 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             }
 
             cmp.remove("Equipment");
-            if (cmp.containsKey("DropChances", 9)) {
+            if (cmp.contains("DropChances", 9)) {
                 nbttaglist1 = cmp.getList("DropChances", 5);
                 ListTag nbttaglist2;
 
-                if (!cmp.containsKey("HandDropChances", 10)) {
+                if (!cmp.contains("HandDropChances", 10)) {
                     nbttaglist2 = new ListTag();
-                    nbttaglist2.add(new FloatTag(nbttaglist1.getFloat(0)));
+                    nbttaglist2.add(FloatTag.of(nbttaglist1.getFloat(0)));
-                    nbttaglist2.add(new FloatTag(0.0F));
+                    nbttaglist2.add(FloatTag.of(0.0F));
                     cmp.put("HandDropChances", nbttaglist2);
                 }
 
-                if (!cmp.containsKey("ArmorDropChances", 10)) {
+                if (!cmp.contains("ArmorDropChances", 10)) {
                     nbttaglist2 = new ListTag();
-                    nbttaglist2.add(new FloatTag(nbttaglist1.getFloat(1)));
+                    nbttaglist2.add(FloatTag.of(nbttaglist1.getFloat(1)));
-                    nbttaglist2.add(new FloatTag(nbttaglist1.getFloat(2)));
+                    nbttaglist2.add(FloatTag.of(nbttaglist1.getFloat(2)));
-                    nbttaglist2.add(new FloatTag(nbttaglist1.getFloat(3)));
+                    nbttaglist2.add(FloatTag.of(nbttaglist1.getFloat(3)));
-                    nbttaglist2.add(new FloatTag(nbttaglist1.getFloat(4)));
+                    nbttaglist2.add(FloatTag.of(nbttaglist1.getFloat(4)));
                     cmp.put("ArmorDropChances", nbttaglist2);
                 }
 
@@ -666,7 +672,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
         private static final Map<String, String> b = Maps.newHashMap();
         private static final Map<String, String> c = Maps.newHashMap();
 
-        DataInspectorBlockEntity() {}
+        DataInspectorBlockEntity() {
+        }
 
         @Nullable
         private static String convertEntityId(int i, String s) {
@@ -680,12 +687,12 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         @Override
         public net.minecraft.nbt.CompoundTag inspect(net.minecraft.nbt.CompoundTag cmp, int sourceVer, int targetVer) {
-            if (!cmp.containsKey("tag", 10)) {
+            if (!cmp.contains("tag", 10)) {
                 return cmp;
             } else {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("tag");
 
-                if (nbttagcompound1.containsKey("BlockEntityTag", 10)) {
+                if (nbttagcompound1.contains("BlockEntityTag", 10)) {
                     net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttagcompound1.getCompound("BlockEntityTag");
                     String s = cmp.getString("id");
                     String s1 = convertEntityId(sourceVer, s);
@@ -696,7 +703,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
                         // DataInspectorBlockEntity.a.warn("Unable to resolve BlockEntity for ItemInstance: {}", s);
                         flag = false;
                     } else {
-                        flag = !nbttagcompound2.containsKey("id");
+                        flag = !nbttagcompound2.contains("id");
                         nbttagcompound2.putString("id", s1);
                     }
 
@@ -807,13 +814,14 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final Logger a = LogManager.getLogger(FabricDataFixer.class);
 
-        DataInspectorEntity() {}
+        DataInspectorEntity() {
+        }
 
         @Override
         public net.minecraft.nbt.CompoundTag inspect(net.minecraft.nbt.CompoundTag cmp, int sourceVer, int targetVer) {
             net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("tag");
 
-            if (nbttagcompound1.containsKey("EntityTag", 10)) {
+            if (nbttagcompound1.contains("EntityTag", 10)) {
                 net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttagcompound1.getCompound("EntityTag");
                 String s = cmp.getString("id");
                 String s1;
@@ -834,7 +842,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
                     DataInspectorEntity.a.warn("Unable to resolve Entity for ItemInstance: {}", s);
                     flag = false;
                 } else {
-                    flag = !nbttagcompound2.containsKey("id", 8);
+                    flag = !nbttagcompound2.contains("id", 8);
                     nbttagcompound2.putString("id", s1);
                 }
 
@@ -885,6 +893,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             return nbttagcompound;
         }
     }
+
     private static class DataInspectorItem extends DataInspectorTagged {
 
         private final String[] keys;
@@ -907,14 +916,15 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final String[] materials = new String[2268];
 
-        DataConverterMaterialId() {}
+        DataConverterMaterialId() {
+        }
 
         public int getDataVersion() {
             return 102;
         }
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
-            if (cmp.containsKey("id", 99)) {
+            if (cmp.contains("id", 99)) {
                 short short0 = cmp.getShort("id");
 
                 if (short0 > 0 && short0 < materials.length && materials[short0] != null) {
@@ -1246,7 +1256,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterArmorStand implements DataConverter {
 
-        DataConverterArmorStand() {}
+        DataConverterArmorStand() {
+        }
 
         public int getDataVersion() {
             return 147;
@@ -1263,25 +1274,26 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterBanner implements DataConverter {
 
-        DataConverterBanner() {}
+        DataConverterBanner() {
+        }
 
         public int getDataVersion() {
             return 804;
         }
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
-            if ("minecraft:banner".equals(cmp.getString("id")) && cmp.containsKey("tag", 10)) {
+            if ("minecraft:banner".equals(cmp.getString("id")) && cmp.contains("tag", 10)) {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("tag");
 
-                if (nbttagcompound1.containsKey("BlockEntityTag", 10)) {
+                if (nbttagcompound1.contains("BlockEntityTag", 10)) {
                     net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttagcompound1.getCompound("BlockEntityTag");
 
-                    if (nbttagcompound2.containsKey("Base", 99)) {
+                    if (nbttagcompound2.contains("Base", 99)) {
                         cmp.putShort("Damage", (short) (nbttagcompound2.getShort("Base") & 15));
-                        if (nbttagcompound1.containsKey("display", 10)) {
+                        if (nbttagcompound1.contains("display", 10)) {
                             net.minecraft.nbt.CompoundTag nbttagcompound3 = nbttagcompound1.getCompound("display");
 
-                            if (nbttagcompound3.containsKey("Lore", 9)) {
+                            if (nbttagcompound3.contains("Lore", 9)) {
                                 ListTag nbttaglist = nbttagcompound3.getList("Lore", 8);
 
                                 if (nbttaglist.size() == 1 && "(+NBT)".equals(nbttaglist.getString(0))) {
@@ -1310,7 +1322,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final String[] potions = new String[128];
 
-        DataConverterPotionId() {}
+        DataConverterPotionId() {
+        }
 
         public int getDataVersion() {
             return 102;
@@ -1321,7 +1334,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("tag");
                 short short0 = cmp.getShort("Damage");
 
-                if (!nbttagcompound1.containsKey("Potion", 8)) {
+                if (!nbttagcompound1.contains("Potion", 8)) {
                     String s = DataConverterPotionId.potions[short0 & 127];
 
                     nbttagcompound1.putString("Potion", s == null ? "minecraft:water" : s);
@@ -1475,7 +1488,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final String[] eggs = new String[256];
 
-        DataConverterSpawnEgg() {}
+        DataConverterSpawnEgg() {
+        }
 
         public int getDataVersion() {
             return 105;
@@ -1487,7 +1501,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
                 net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttagcompound1.getCompound("EntityTag");
                 short short0 = cmp.getShort("Damage");
 
-                if (!nbttagcompound2.containsKey("id", 8)) {
+                if (!nbttagcompound2.contains("id", 8)) {
                     String s = DataConverterSpawnEgg.eggs[short0 & 255];
 
                     if (s != null) {
@@ -1581,7 +1595,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final List<String> a = Lists.newArrayList(new String[] { "MinecartRideable", "MinecartChest", "MinecartFurnace", "MinecartTNT", "MinecartSpawner", "MinecartHopper", "MinecartCommandBlock" });
 
-        DataConverterMinecart() {}
+        DataConverterMinecart() {
+        }
 
         public int getDataVersion() {
             return 106;
@@ -1606,7 +1621,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterMobSpawner implements DataConverter {
 
-        DataConverterMobSpawner() {}
+        DataConverterMobSpawner() {
+        }
 
         public int getDataVersion() {
             return 107;
@@ -1616,7 +1632,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             if (!"MobSpawner".equals(cmp.getString("id"))) {
                 return cmp;
             } else {
-                if (cmp.containsKey("EntityId", 8)) {
+                if (cmp.contains("EntityId", 8)) {
                     String s = cmp.getString("EntityId");
                     net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("SpawnData");
 
@@ -1625,13 +1641,13 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
                     cmp.remove("EntityId");
                 }
 
-                if (cmp.containsKey("SpawnPotentials", 9)) {
+                if (cmp.contains("SpawnPotentials", 9)) {
                     ListTag nbttaglist = cmp.getList("SpawnPotentials", 10);
 
                     for (int i = 0; i < nbttaglist.size(); ++i) {
-                        net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttaglist.getCompoundTag(i);
+                        net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttaglist.getCompound(i);
 
-                        if (nbttagcompound2.containsKey("Type", 8)) {
+                        if (nbttagcompound2.contains("Type", 8)) {
                             net.minecraft.nbt.CompoundTag nbttagcompound3 = nbttagcompound2.getCompound("Properties");
 
                             nbttagcompound3.putString("id", nbttagcompound2.getString("Type"));
@@ -1649,14 +1665,15 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterUUID implements DataConverter {
 
-        DataConverterUUID() {}
+        DataConverterUUID() {
+        }
 
         public int getDataVersion() {
             return 108;
         }
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
-            if (cmp.containsKey("UUID", 8)) {
+            if (cmp.contains("UUID", 8)) {
                 cmp.putUuid("UUID", UUID.fromString(cmp.getString("UUID")));
             }
 
@@ -1668,7 +1685,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final Set<String> a = Sets.newHashSet("ArmorStand", "Bat", "Blaze", "CaveSpider", "Chicken", "Cow", "Creeper", "EnderDragon", "Enderman", "Endermite", "EntityHorse", "Ghast", "Giant", "Guardian", "LavaSlime", "MushroomCow", "Ozelot", "Pig", "PigZombie", "Rabbit", "Sheep", "Shulker", "Silverfish", "Skeleton", "Slime", "SnowMan", "Spider", "Squid", "Villager", "VillagerGolem", "Witch", "WitherBoss", "Wolf", "Zombie");
 
-        DataConverterHealth() {}
+        DataConverterHealth() {
+        }
 
         public int getDataVersion() {
             return 109;
@@ -1678,11 +1696,11 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             if (DataConverterHealth.a.contains(cmp.getString("id"))) {
                 float f;
 
-                if (cmp.containsKey("HealF", 99)) {
+                if (cmp.contains("HealF", 99)) {
                     f = cmp.getFloat("HealF");
                     cmp.remove("HealF");
                 } else {
-                    if (!cmp.containsKey("Health", 99)) {
+                    if (!cmp.contains("Health", 99)) {
                         return cmp;
                     }
 
@@ -1698,14 +1716,15 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterSaddle implements DataConverter {
 
-        DataConverterSaddle() {}
+        DataConverterSaddle() {
+        }
 
         public int getDataVersion() {
             return 110;
         }
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
-            if ("EntityHorse".equals(cmp.getString("id")) && !cmp.containsKey("SaddleItem", 10) && cmp.getBoolean("Saddle")) {
+            if ("EntityHorse".equals(cmp.getString("id")) && !cmp.contains("SaddleItem", 10) && cmp.getBoolean("Saddle")) {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = new net.minecraft.nbt.CompoundTag();
 
                 nbttagcompound1.putString("id", "minecraft:saddle");
@@ -1721,7 +1740,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterHanging implements DataConverter {
 
-        DataConverterHanging() {}
+        DataConverterHanging() {
+        }
 
         public int getDataVersion() {
             return 111;
@@ -1732,16 +1752,16 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             boolean flag = "Painting".equals(s);
             boolean flag1 = "ItemFrame".equals(s);
 
-            if ((flag || flag1) && !cmp.containsKey("Facing", 99)) {
+            if ((flag || flag1) && !cmp.contains("Facing", 99)) {
                 Direction enumdirection;
 
-                if (cmp.containsKey("Direction", 99)) {
+                if (cmp.contains("Direction", 99)) {
                     enumdirection = Direction.fromHorizontal(cmp.getByte("Direction"));
                     cmp.putInt("TileX", cmp.getInt("TileX") + enumdirection.getOffsetX());
                     cmp.putInt("TileY", cmp.getInt("TileY") + enumdirection.getOffsetY());
                     cmp.putInt("TileZ", cmp.getInt("TileZ") + enumdirection.getOffsetZ());
                     cmp.remove("Direction");
-                    if (flag1 && cmp.containsKey("ItemRotation", 99)) {
+                    if (flag1 && cmp.contains("ItemRotation", 99)) {
                         cmp.putByte("ItemRotation", (byte) (cmp.getByte("ItemRotation") * 2));
                     }
                 } else {
@@ -1758,7 +1778,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterDropChances implements DataConverter {
 
-        DataConverterDropChances() {}
+        DataConverterDropChances() {
+        }
 
         public int getDataVersion() {
             return 113;
@@ -1767,14 +1788,14 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
             ListTag nbttaglist;
 
-            if (cmp.containsKey("HandDropChances", 9)) {
+            if (cmp.contains("HandDropChances", 9)) {
                 nbttaglist = cmp.getList("HandDropChances", 5);
                 if (nbttaglist.size() == 2 && nbttaglist.getFloat(0) == 0.0F && nbttaglist.getFloat(1) == 0.0F) {
                     cmp.remove("HandDropChances");
                 }
             }
 
-            if (cmp.containsKey("ArmorDropChances", 9)) {
+            if (cmp.contains("ArmorDropChances", 9)) {
                 nbttaglist = cmp.getList("ArmorDropChances", 5);
                 if (nbttaglist.size() == 4 && nbttaglist.getFloat(0) == 0.0F && nbttaglist.getFloat(1) == 0.0F && nbttaglist.getFloat(2) == 0.0F && nbttaglist.getFloat(3) == 0.0F) {
                     cmp.remove("ArmorDropChances");
@@ -1787,14 +1808,15 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterRiding implements DataConverter {
 
-        DataConverterRiding() {}
+        DataConverterRiding() {
+        }
 
         public int getDataVersion() {
             return 135;
         }
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
-            while (cmp.containsKey("Riding", 10)) {
+            while (cmp.contains("Riding", 10)) {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = this.b(cmp);
 
                 this.convert(cmp, nbttagcompound1);
@@ -1821,7 +1843,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterBook implements DataConverter {
 
-        DataConverterBook() {}
+        DataConverterBook() {
+        }
 
         public int getDataVersion() {
             return 165;
@@ -1831,7 +1854,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             if ("minecraft:written_book".equals(cmp.getString("id"))) {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("tag");
 
-                if (nbttagcompound1.containsKey("pages", 9)) {
+                if (nbttagcompound1.contains("pages", 9)) {
                     ListTag nbttaglist = nbttagcompound1.getList("pages", 8);
 
                     for (int i = 0; i < nbttaglist.size(); ++i) {
@@ -1875,7 +1898,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
                             object = new LiteralText("");
                         }
 
-                        nbttaglist.set(i, new StringTag(Text.Serializer.toJson((Text) object)));
+                        nbttaglist.set(i, StringTag.of(Text.Serializer.toJson((Text) object)));
                     }
 
                     nbttagcompound1.put("pages", nbttaglist);
@@ -1890,14 +1913,15 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final Identifier a = new Identifier("cooked_fished");
 
-        DataConverterCookedFish() {}
+        DataConverterCookedFish() {
+        }
 
         public int getDataVersion() {
             return 502;
         }
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
-            if (cmp.containsKey("id", 8) && DataConverterCookedFish.a.equals(new Identifier(cmp.getString("id")))) {
+            if (cmp.contains("id", 8) && DataConverterCookedFish.a.equals(new Identifier(cmp.getString("id")))) {
                 cmp.putString("id", "minecraft:cooked_fish");
             }
 
@@ -1909,7 +1933,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final Random a = new Random();
 
-        DataConverterZombie() {}
+        DataConverterZombie() {
+        }
 
         public int getDataVersion() {
             return 502;
@@ -1917,10 +1942,10 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
             if ("Zombie".equals(cmp.getString("id")) && cmp.getBoolean("IsVillager")) {
-                if (!cmp.containsKey("ZombieType", 99)) {
+                if (!cmp.contains("ZombieType", 99)) {
                     int i = -1;
 
-                    if (cmp.containsKey("VillagerProfession", 99)) {
+                    if (cmp.contains("VillagerProfession", 99)) {
                         try {
                             i = this.convert(cmp.getInt("VillagerProfession"));
                         } catch (RuntimeException runtimeexception) {
@@ -1948,7 +1973,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterVBO implements DataConverter {
 
-        DataConverterVBO() {}
+        DataConverterVBO() {
+        }
 
         public int getDataVersion() {
             return 505;
@@ -1962,7 +1988,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterGuardian implements DataConverter {
 
-        DataConverterGuardian() {}
+        DataConverterGuardian() {
+        }
 
         public int getDataVersion() {
             return 700;
@@ -1983,7 +2010,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterSkeleton implements DataConverter {
 
-        DataConverterSkeleton() {}
+        DataConverterSkeleton() {
+        }
 
         public int getDataVersion() {
             return 701;
@@ -2010,7 +2038,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterZombieType implements DataConverter {
 
-        DataConverterZombieType() {}
+        DataConverterZombieType() {
+        }
 
         public int getDataVersion() {
             return 702;
@@ -2045,7 +2074,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterHorse implements DataConverter {
 
-        DataConverterHorse() {}
+        DataConverterHorse() {
+        }
 
         public int getDataVersion() {
             return 703;
@@ -2089,7 +2119,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final Map<String, String> a = Maps.newHashMap();
 
-        DataConverterTileEntity() {}
+        DataConverterTileEntity() {
+        }
 
         public int getDataVersion() {
             return 704;
@@ -2136,7 +2167,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final Map<String, String> a = Maps.newHashMap();
 
-        DataConverterEntity() {}
+        DataConverterEntity() {
+        }
 
         public int getDataVersion() {
             return 704;
@@ -2233,7 +2265,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterPotionWater implements DataConverter {
 
-        DataConverterPotionWater() {}
+        DataConverterPotionWater() {
+        }
 
         public int getDataVersion() {
             return 806;
@@ -2245,11 +2278,11 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             if ("minecraft:potion".equals(s) || "minecraft:splash_potion".equals(s) || "minecraft:lingering_potion".equals(s) || "minecraft:tipped_arrow".equals(s)) {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("tag");
 
-                if (!nbttagcompound1.containsKey("Potion", 8)) {
+                if (!nbttagcompound1.contains("Potion", 8)) {
                     nbttagcompound1.putString("Potion", "minecraft:water");
                 }
 
-                if (!cmp.containsKey("tag", 10)) {
+                if (!cmp.contains("tag", 10)) {
                     cmp.put("tag", nbttagcompound1);
                 }
             }
@@ -2260,14 +2293,15 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterShulker implements DataConverter {
 
-        DataConverterShulker() {}
+        DataConverterShulker() {
+        }
 
         public int getDataVersion() {
             return 808;
         }
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
-            if ("minecraft:shulker".equals(cmp.getString("id")) && !cmp.containsKey("Color", 99)) {
+            if ("minecraft:shulker".equals(cmp.getString("id")) && !cmp.contains("Color", 99)) {
                 cmp.putByte("Color", (byte) 10);
             }
 
@@ -2279,17 +2313,18 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         public static final String[] a = new String[] { "minecraft:white_shulker_box", "minecraft:orange_shulker_box", "minecraft:magenta_shulker_box", "minecraft:light_blue_shulker_box", "minecraft:yellow_shulker_box", "minecraft:lime_shulker_box", "minecraft:pink_shulker_box", "minecraft:gray_shulker_box", "minecraft:silver_shulker_box", "minecraft:cyan_shulker_box", "minecraft:purple_shulker_box", "minecraft:blue_shulker_box", "minecraft:brown_shulker_box", "minecraft:green_shulker_box", "minecraft:red_shulker_box", "minecraft:black_shulker_box" };
 
-        DataConverterShulkerBoxItem() {}
+        DataConverterShulkerBoxItem() {
+        }
 
         public int getDataVersion() {
             return 813;
         }
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
-            if ("minecraft:shulker_box".equals(cmp.getString("id")) && cmp.containsKey("tag", 10)) {
+            if ("minecraft:shulker_box".equals(cmp.getString("id")) && cmp.contains("tag", 10)) {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("tag");
 
-                if (nbttagcompound1.containsKey("BlockEntityTag", 10)) {
+                if (nbttagcompound1.contains("BlockEntityTag", 10)) {
                     net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttagcompound1.getCompound("BlockEntityTag");
 
                     if (nbttagcompound2.getList("Items", 10).isEmpty()) {
@@ -2317,7 +2352,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterShulkerBoxBlock implements DataConverter {
 
-        DataConverterShulkerBoxBlock() {}
+        DataConverterShulkerBoxBlock() {
+        }
 
         public int getDataVersion() {
             return 813;
@@ -2334,14 +2370,15 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterLang implements DataConverter {
 
-        DataConverterLang() {}
+        DataConverterLang() {
+        }
 
         public int getDataVersion() {
             return 816;
         }
 
         public net.minecraft.nbt.CompoundTag convert(net.minecraft.nbt.CompoundTag cmp) {
-            if (cmp.containsKey("lang", 8)) {
+            if (cmp.contains("lang", 8)) {
                 cmp.putString("lang", cmp.getString("lang").toLowerCase(Locale.ROOT));
             }
 
@@ -2351,7 +2388,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterTotem implements DataConverter {
 
-        DataConverterTotem() {}
+        DataConverterTotem() {
+        }
 
         public int getDataVersion() {
             return 820;
@@ -2370,7 +2408,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         private static final Logger a = LogManager.getLogger(FabricDataFixer.class);
 
-        DataConverterBedBlock() {}
+        DataConverterBedBlock() {
+        }
 
         public int getDataVersion() {
             return 1125;
@@ -2387,7 +2426,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
                 ListTag nbttaglist1 = nbttagcompound1.getList("Sections", 10);
 
                 for (int k = 0; k < nbttaglist1.size(); ++k) {
-                    net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttaglist1.getCompoundTag(k);
+                    net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttaglist1.getCompound(k);
                     byte b0 = nbttagcompound2.getByte("Y");
                     byte[] abyte = nbttagcompound2.getByteArray("Blocks");
 
@@ -2416,7 +2455,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
     private static class DataConverterBedItem implements DataConverter {
 
-        DataConverterBedItem() {}
+        DataConverterBedItem() {
+        }
 
         public int getDataVersion() {
             return 1125;
@@ -2434,17 +2474,17 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     private static class DataConverterSignText implements DataConverter {
 
         public static final Gson a = new GsonBuilder().registerTypeAdapter(Text.class, new JsonDeserializer() {
-            Text a(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException {
+            MutableText a(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException {
                 if (jsonelement.isJsonPrimitive()) {
                     return new LiteralText(jsonelement.getAsString());
                 } else if (jsonelement.isJsonArray()) {
                     JsonArray jsonarray = jsonelement.getAsJsonArray();
-                    Text iTextComponent = null;
+                    MutableText iTextComponent = null;
-                    Iterator iterator = jsonarray.iterator();
+                    Iterator<JsonElement> iterator = jsonarray.iterator();
 
                     while (iterator.hasNext()) {
-                        JsonElement jsonelement1 = (JsonElement) iterator.next();
+                        JsonElement jsonelement1 = iterator.next();
-                        Text iTextComponent1 = this.a(jsonelement1, jsonelement1.getClass(), jsondeserializationcontext);
+                        MutableText iTextComponent1 = this.a(jsonelement1, jsonelement1.getClass(), jsondeserializationcontext);
 
                         if (iTextComponent == null) {
                             iTextComponent = iTextComponent1;
@@ -2464,7 +2504,8 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             }
         }).create();
 
-        DataConverterSignText() {}
+        DataConverterSignText() {
+        }
 
         public int getDataVersion() {
             return 101;
@@ -2529,10 +2570,10 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     private static class DataInspectorPlayerVehicle implements DataInspector {
         @Override
         public net.minecraft.nbt.CompoundTag inspect(net.minecraft.nbt.CompoundTag cmp, int sourceVer, int targetVer) {
-            if (cmp.containsKey("RootVehicle", 10)) {
+            if (cmp.contains("RootVehicle", 10)) {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("RootVehicle");
 
-                if (nbttagcompound1.containsKey("Entity", 10)) {
+                if (nbttagcompound1.contains("Entity", 10)) {
                     convertCompound(LegacyType.ENTITY, nbttagcompound1, "Entity", sourceVer, targetVer);
                 }
             }
@@ -2544,7 +2585,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     private static class DataInspectorLevelPlayer implements DataInspector {
         @Override
         public net.minecraft.nbt.CompoundTag inspect(net.minecraft.nbt.CompoundTag cmp, int sourceVer, int targetVer) {
-            if (cmp.containsKey("Player", 10)) {
+            if (cmp.contains("Player", 10)) {
                 convertCompound(LegacyType.PLAYER, cmp, "Player", sourceVer, targetVer);
             }
 
@@ -2559,23 +2600,23 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
             int j;
             net.minecraft.nbt.CompoundTag nbttagcompound1;
 
-            if (cmp.containsKey("entities", 9)) {
+            if (cmp.contains("entities", 9)) {
                 nbttaglist = cmp.getList("entities", 10);
 
                 for (j = 0; j < nbttaglist.size(); ++j) {
                     nbttagcompound1 = (net.minecraft.nbt.CompoundTag) nbttaglist.get(j);
-                    if (nbttagcompound1.containsKey("nbt", 10)) {
+                    if (nbttagcompound1.contains("nbt", 10)) {
                         convertCompound(LegacyType.ENTITY, nbttagcompound1, "nbt", sourceVer, targetVer);
                     }
                 }
             }
 
-            if (cmp.containsKey("blocks", 9)) {
+            if (cmp.contains("blocks", 9)) {
                 nbttaglist = cmp.getList("blocks", 10);
 
                 for (j = 0; j < nbttaglist.size(); ++j) {
                     nbttagcompound1 = (net.minecraft.nbt.CompoundTag) nbttaglist.get(j);
-                    if (nbttagcompound1.containsKey("nbt", 10)) {
+                    if (nbttagcompound1.contains("nbt", 10)) {
                         convertCompound(LegacyType.BLOCK_ENTITY, nbttagcompound1, "nbt", sourceVer, targetVer);
                     }
                 }
@@ -2588,12 +2629,12 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     private static class DataInspectorChunks implements DataInspector {
         @Override
         public net.minecraft.nbt.CompoundTag inspect(net.minecraft.nbt.CompoundTag cmp, int sourceVer, int targetVer) {
-            if (cmp.containsKey("Level", 10)) {
+            if (cmp.contains("Level", 10)) {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("Level");
                 ListTag nbttaglist;
                 int j;
 
-                if (nbttagcompound1.containsKey("Entities", 9)) {
+                if (nbttagcompound1.contains("Entities", 9)) {
                     nbttaglist = nbttagcompound1.getList("Entities", 10);
 
                     for (j = 0; j < nbttaglist.size(); ++j) {
@@ -2601,7 +2642,7 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
                     }
                 }
 
-                if (nbttagcompound1.containsKey("TileEntities", 9)) {
+                if (nbttagcompound1.contains("TileEntities", 9)) {
                     nbttaglist = nbttagcompound1.getList("TileEntities", 10);
 
                     for (j = 0; j < nbttaglist.size(); ++j) {
@@ -2617,11 +2658,11 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
     private static class DataInspectorEntityPassengers implements DataInspector {
         @Override
         public net.minecraft.nbt.CompoundTag inspect(net.minecraft.nbt.CompoundTag cmp, int sourceVer, int targetVer) {
-            if (cmp.containsKey("Passengers", 9)) {
+            if (cmp.contains("Passengers", 9)) {
                 ListTag nbttaglist = cmp.getList("Passengers", 10);
 
                 for (int j = 0; j < nbttaglist.size(); ++j) {
-                    nbttaglist.set(j, convert(LegacyType.ENTITY, nbttaglist.getCompoundTag(j), sourceVer, targetVer));
+                    nbttaglist.set(j, convert(LegacyType.ENTITY, nbttaglist.getCompound(j), sourceVer, targetVer));
                 }
             }
 
@@ -2634,11 +2675,11 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
         public net.minecraft.nbt.CompoundTag inspect(net.minecraft.nbt.CompoundTag cmp, int sourceVer, int targetVer) {
             convertItems(cmp, "Inventory", sourceVer, targetVer);
             convertItems(cmp, "EnderItems", sourceVer, targetVer);
-            if (cmp.containsKey("ShoulderEntityLeft", 10)) {
+            if (cmp.contains("ShoulderEntityLeft", 10)) {
                 convertCompound(LegacyType.ENTITY, cmp, "ShoulderEntityLeft", sourceVer, targetVer);
             }
 
-            if (cmp.containsKey("ShoulderEntityRight", 10)) {
+            if (cmp.contains("ShoulderEntityRight", 10)) {
                 convertCompound(LegacyType.ENTITY, cmp, "ShoulderEntityRight", sourceVer, targetVer);
             }
 
@@ -2651,14 +2692,14 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
 
         @Override
         public net.minecraft.nbt.CompoundTag inspect(net.minecraft.nbt.CompoundTag cmp, int sourceVer, int targetVer) {
-            if (entityVillager.equals(new Identifier(cmp.getString("id"))) && cmp.containsKey("Offers", 10)) {
+            if (entityVillager.equals(new Identifier(cmp.getString("id"))) && cmp.contains("Offers", 10)) {
                 net.minecraft.nbt.CompoundTag nbttagcompound1 = cmp.getCompound("Offers");
 
-                if (nbttagcompound1.containsKey("Recipes", 9)) {
+                if (nbttagcompound1.contains("Recipes", 9)) {
                     ListTag nbttaglist = nbttagcompound1.getList("Recipes", 10);
 
                     for (int j = 0; j < nbttaglist.size(); ++j) {
-                        net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttaglist.getCompoundTag(j);
+                        net.minecraft.nbt.CompoundTag nbttagcompound2 = nbttaglist.getCompound(j);
 
                         convertItem(nbttagcompound2, "buy", sourceVer, targetVer);
                         convertItem(nbttagcompound2, "buyB", sourceVer, targetVer);
@@ -2695,11 +2736,11 @@ class FabricDataFixer extends DataFixerBuilder implements com.sk89q.worldedit.wo
         @Override
         public net.minecraft.nbt.CompoundTag inspect(net.minecraft.nbt.CompoundTag cmp, int sourceVer, int targetVer) {
             if (tileEntityMobSpawner.equals(new Identifier(cmp.getString("id")))) {
-                if (cmp.containsKey("SpawnPotentials", 9)) {
+                if (cmp.contains("SpawnPotentials", 9)) {
                     ListTag nbttaglist = cmp.getList("SpawnPotentials", 10);
 
                     for (int j = 0; j < nbttaglist.size(); ++j) {
-                        net.minecraft.nbt.CompoundTag nbttagcompound1 = nbttaglist.getCompoundTag(j);
+                        net.minecraft.nbt.CompoundTag nbttagcompound1 = nbttaglist.getCompound(j);
 
                         convertCompound(LegacyType.ENTITY, nbttagcompound1, "Entity", sourceVer, targetVer);
                     }

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

@@ -19,8 +19,6 @@
 
 package com.sk89q.worldedit.fabric;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.entity.metadata.EntityProperties;
@@ -35,9 +33,10 @@ import net.minecraft.util.Identifier;
 import net.minecraft.util.registry.Registry;
 
 import java.lang.ref.WeakReference;
-
 import javax.annotation.Nullable;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 class FabricEntity implements Entity {
 
     private final WeakReference<net.minecraft.entity.Entity> entityRef;
@@ -64,7 +63,7 @@ class FabricEntity implements Entity {
     public Location getLocation() {
         net.minecraft.entity.Entity entity = entityRef.get();
         if (entity != null) {
-            Vector3 position = Vector3.at(entity.x, entity.y, entity.z);
+            Vector3 position = Vector3.at(entity.getX(), entity.getY(), entity.getZ());
             float yaw = entity.yaw;
             float pitch = entity.pitch;
 

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

@@ -19,10 +19,7 @@
 
 package com.sk89q.worldedit.fabric;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-
 import com.sk89q.worldedit.entity.metadata.EntityProperties;
-import net.minecraft.entity.EnderEyeEntity;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.ExperienceOrbEntity;
 import net.minecraft.entity.FallingBlockEntity;
@@ -36,15 +33,17 @@ import net.minecraft.entity.decoration.painting.PaintingEntity;
 import net.minecraft.entity.mob.AmbientEntity;
 import net.minecraft.entity.mob.MobEntity;
 import net.minecraft.entity.passive.AnimalEntity;
-import net.minecraft.entity.passive.TameableEntity;
 import net.minecraft.entity.passive.GolemEntity;
+import net.minecraft.entity.passive.TameableEntity;
 import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.entity.projectile.Projectile;
+import net.minecraft.entity.projectile.ProjectileEntity;
 import net.minecraft.entity.vehicle.AbstractMinecartEntity;
 import net.minecraft.entity.vehicle.BoatEntity;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.village.Trader;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 public class FabricEntityProperties implements EntityProperties {
 
     private final Entity entity;
@@ -61,7 +60,7 @@ public class FabricEntityProperties implements EntityProperties {
 
     @Override
     public boolean isProjectile() {
-        return entity instanceof EnderEyeEntity || entity instanceof Projectile;
+        return entity instanceof ProjectileEntity;
     }
 
     @Override

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

@@ -33,8 +33,11 @@ import java.util.stream.Collectors;
 public class FabricItemCategoryRegistry implements ItemCategoryRegistry {
     @Override
     public Set<ItemType> getCategorisedByName(String category) {
-        return Optional.ofNullable(ItemTags.getContainer().get(new Identifier(category)))
+        return Optional.ofNullable(ItemTags.getTagGroup().getTag(new Identifier(category)))
-                .map(Tag::values).orElse(Collections.emptySet())
+            .map(Tag::values)
-                .stream().map(FabricAdapter::adapt).collect(Collectors.toSet());
+            .orElse(Collections.emptyList())
+            .stream()
+            .map(FabricAdapter::adapt)
+            .collect(Collectors.toSet());
     }
 }

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

@@ -19,24 +19,26 @@
 
 package com.sk89q.worldedit.fabric;
 
+import com.sk89q.worldedit.blocks.BaseItemStack;
+import com.sk89q.worldedit.util.formatting.text.Component;
+import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
 import com.sk89q.worldedit.world.item.ItemType;
 import com.sk89q.worldedit.world.registry.BundledItemRegistry;
-import net.fabricmc.api.EnvType;
-import net.fabricmc.loader.api.FabricLoader;
-import net.minecraft.client.resource.language.I18n;
-import net.minecraft.item.Item;
-
-import javax.annotation.Nullable;
 
 public class FabricItemRegistry extends BundledItemRegistry {
 
-    @Nullable
     @Override
-    public String getName(ItemType itemType) {
+    public Component getRichName(ItemType itemType) {
-        if (FabricLoader.getInstance().getEnvironmentType() == EnvType.CLIENT) {
+        return TranslatableComponent.of(
-            final Item item = FabricAdapter.adapt(itemType);
+            FabricAdapter.adapt(itemType).getTranslationKey()
-            return I18n.translate(item.getTranslationKey());
+        );
     }
-        return super.getName(itemType);
+
+    @Override
+    public Component getRichName(BaseItemStack itemStack) {
+        return TranslatableComponent.of(
+            FabricAdapter.adapt(itemStack).getTranslationKey()
+        );
     }
+
 }

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

@@ -30,7 +30,7 @@ public interface FabricPermissionsProvider {
 
     class VanillaPermissionsProvider implements FabricPermissionsProvider {
 
-        private FabricPlatform platform;
+        private final FabricPlatform platform;
 
         public VanillaPermissionsProvider(FabricPlatform platform) {
             this.platform = platform;
@@ -39,12 +39,13 @@ public interface FabricPermissionsProvider {
         @Override
         public boolean hasPermission(ServerPlayerEntity player, String permission) {
             FabricConfiguration configuration = platform.getConfiguration();
-            return configuration.cheatMode ||
+            return configuration.cheatMode
-                    player.server.getPlayerManager().isOperator(player.getGameProfile()) ||
+                || player.server.getPlayerManager().isOperator(player.getGameProfile())
-                    (configuration.creativeEnable && player.interactionManager.getGameMode() == GameMode.CREATIVE);
+                || (configuration.creativeEnable && player.interactionManager.getGameMode() == GameMode.CREATIVE);
         }
 
         @Override
-        public void registerPermission(String permission) {}
+        public void registerPermission(String permission) {
+        }
     }
 }

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

@@ -20,6 +20,7 @@
 package com.sk89q.worldedit.fabric;
 
 import com.google.common.collect.Sets;
+import com.mojang.brigadier.CommandDispatcher;
 import com.sk89q.worldedit.command.util.PermissionCondition;
 import com.sk89q.worldedit.entity.Player;
 import com.sk89q.worldedit.extension.platform.AbstractPlatform;
@@ -35,15 +36,16 @@ 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.command.ServerCommandSource;
 import net.minecraft.server.dedicated.MinecraftDedicatedServer;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.server.world.ServerWorld;
 import net.minecraft.util.Identifier;
 import net.minecraft.util.registry.Registry;
+import net.minecraft.world.level.ServerWorldProperties;
 import org.enginehub.piston.Command;
 import org.enginehub.piston.CommandManager;
 
-import javax.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -51,6 +53,7 @@ import java.util.EnumMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import javax.annotation.Nullable;
 
 import static java.util.stream.Collectors.toList;
 
@@ -61,10 +64,12 @@ class FabricPlatform extends AbstractPlatform implements MultiUserPlatform {
     private final FabricDataFixer dataFixer;
     private final @Nullable Watchdog watchdog;
     private boolean hookingEvents = false;
+    private CommandDispatcher<ServerCommandSource> nativeDispatcher;
 
     FabricPlatform(FabricWorldEdit mod, MinecraftServer server) {
         this.mod = mod;
         this.server = server;
+        this.nativeDispatcher = server.getCommandManager().getDispatcher();
         this.dataFixer = new FabricDataFixer(getDataVersion());
         this.watchdog = server instanceof MinecraftDedicatedServer
             ? (Watchdog) server : null;
@@ -138,7 +143,7 @@ class FabricPlatform extends AbstractPlatform implements MultiUserPlatform {
             return world;
         } else {
             for (ServerWorld ws : server.getWorlds()) {
-                if (ws.getLevelProperties().getLevelName().equals(world.getName())) {
+                if (((ServerWorldProperties) ws.getLevelProperties()).getLevelName().equals(world.getName())) {
                     return new FabricWorld(ws);
                 }
             }
@@ -147,13 +152,18 @@ class FabricPlatform extends AbstractPlatform implements MultiUserPlatform {
         }
     }
 
+    public void setNativeDispatcher(CommandDispatcher<ServerCommandSource> nativeDispatcher) {
+        this.nativeDispatcher = nativeDispatcher;
+    }
+
     @Override
     public void registerCommands(CommandManager manager) {
-        if (server == null) return;
+        if (server == null) {
-        net.minecraft.server.command.CommandManager mcMan = server.getCommandManager();
+            return;
+        }
 
         for (Command command : manager.getAllCommands().collect(toList())) {
-            CommandWrapper.register(mcMan.getDispatcher(), command);
+            CommandWrapper.register(nativeDispatcher, command);
             Set<String> perms = command.getCondition().as(PermissionCondition.class)
                 .map(PermissionCondition::getPermissions)
                 .orElseGet(Collections::emptySet);

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

@@ -25,8 +25,8 @@ 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.ExtendedPlayerEntity;
 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;
 import com.sk89q.worldedit.math.BlockVector3;
@@ -35,6 +35,7 @@ import com.sk89q.worldedit.session.SessionKey;
 import com.sk89q.worldedit.util.HandSide;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.util.formatting.WorldEditText;
+import com.sk89q.worldedit.util.formatting.component.TextUtils;
 import com.sk89q.worldedit.util.formatting.text.Component;
 import com.sk89q.worldedit.util.formatting.text.serializer.gson.GsonComponentSerializer;
 import com.sk89q.worldedit.world.World;
@@ -44,22 +45,23 @@ import com.sk89q.worldedit.world.block.BlockTypes;
 import io.netty.buffer.Unpooled;
 import net.minecraft.block.Block;
 import net.minecraft.item.ItemStack;
+import net.minecraft.network.PacketByteBuf;
 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.MutableText;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
 import net.minecraft.util.Hand;
 import net.minecraft.util.Identifier;
-import net.minecraft.util.PacketByteBuf;
 import net.minecraft.util.math.BlockPos;
 
-import javax.annotation.Nullable;
 import java.io.IOException;
 import java.util.Locale;
 import java.util.UUID;
+import javax.annotation.Nullable;
 
 public class FabricPlayer extends AbstractPlayerActor {
 
@@ -85,7 +87,7 @@ public class FabricPlayer extends AbstractPlayerActor {
 
     @Override
     public String getName() {
-        return this.player.getName().asFormattedString();
+        return this.player.getName().asString();
     }
 
     @Override
@@ -95,7 +97,7 @@ public class FabricPlayer extends AbstractPlayerActor {
 
     @Override
     public Location getLocation() {
-        Vector3 position = Vector3.at(this.player.x, this.player.y, this.player.z);
+        Vector3 position = Vector3.at(this.player.getX(), this.player.getY(), this.player.getZ());
         return new Location(
                 FabricWorldEdit.inst.getWorld(this.player.world),
                 position,
@@ -133,41 +135,45 @@ public class FabricPlayer extends AbstractPlayerActor {
 
     @Override
     public Locale getLocale() {
-        return Locale.forLanguageTag(((AccessorServerPlayerEntity) this.player).getClientLanguage().replace("_", "-"));
+        return TextUtils.getLocaleByMinecraftTag(((ExtendedPlayerEntity) this.player).getLanguage());
     }
 
     @Override
+    @Deprecated
     public void printRaw(String msg) {
         for (String part : msg.split("\n")) {
-            this.player.sendMessage(new LiteralText(part));
+            this.player.sendMessage(new LiteralText(part), false);
         }
     }
 
     @Override
+    @Deprecated
     public void printDebug(String msg) {
         sendColorized(msg, Formatting.GRAY);
     }
 
     @Override
+    @Deprecated
     public void print(String msg) {
         sendColorized(msg, Formatting.LIGHT_PURPLE);
     }
 
     @Override
+    @Deprecated
     public void printError(String msg) {
         sendColorized(msg, Formatting.RED);
     }
 
     @Override
     public void print(Component component) {
-        this.player.sendMessage(Text.Serializer.fromJson(GsonComponentSerializer.INSTANCE.serialize(WorldEditText.format(component, getLocale()))));
+        this.player.sendMessage(Text.Serializer.fromJson(GsonComponentSerializer.INSTANCE.serialize(WorldEditText.format(component, getLocale()))), false);
     }
 
     private void sendColorized(String msg, Formatting formatting) {
         for (String part : msg.split("\n")) {
-            LiteralText component = new LiteralText(part);
+            MutableText component = new LiteralText(part)
-            component.getStyle().setColor(formatting);
+                .styled(style -> style.withColor(formatting));
-            this.player.sendMessage(component);
+            this.player.sendMessage(component, false);
         }
     }
 
@@ -192,6 +198,11 @@ public class FabricPlayer extends AbstractPlayerActor {
         return FabricWorldEdit.inst.getPermissionsProvider().hasPermission(player, perm);
     }
 
+    @Override
+    public void setPermission(String permission, boolean value) {
+
+    }
+
     @Nullable
     @Override
     public <T> T getFacet(Class<? extends T> cls) {
@@ -246,6 +257,11 @@ public class FabricPlayer extends AbstractPlayerActor {
         }
     }
 
+    @Override
+    public void sendTitle(Component title, Component sub) {
+
+    }
+
     @Override
     public SessionKey getSessionKey() {
         return new SessionKeyImpl(player.getUuid(), player.getName().getString());

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

@@ -19,36 +19,45 @@
 
 package com.sk89q.worldedit.fabric;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import com.boydti.fawe.beta.IChunkGet;
-
+import com.boydti.fawe.beta.implementation.packet.ChunkPacket;
 import com.google.common.cache.CacheBuilder;
 import com.google.common.cache.CacheLoader;
 import com.google.common.cache.LoadingCache;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
-import com.google.common.io.Files;
+import com.google.common.util.concurrent.Futures;
+import com.mojang.serialization.Dynamic;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.WorldEditException;
 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.entity.Player;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.fabric.internal.ExtendedMinecraftServer;
 import com.sk89q.worldedit.fabric.internal.FabricWorldNativeAccess;
 import com.sk89q.worldedit.fabric.internal.NBTConverter;
+import com.sk89q.worldedit.fabric.mixin.AccessorLevelProperties;
+import com.sk89q.worldedit.fabric.mixin.AccessorServerChunkManager;
 import com.sk89q.worldedit.internal.Constants;
 import com.sk89q.worldedit.internal.block.BlockStateIdAccess;
 import com.sk89q.worldedit.math.BlockVector2;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.Vector3;
-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.util.io.file.SafeFiles;
 import com.sk89q.worldedit.world.AbstractWorld;
+import com.sk89q.worldedit.world.RegenOptions;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockState;
@@ -57,77 +66,78 @@ import com.sk89q.worldedit.world.item.ItemTypes;
 import com.sk89q.worldedit.world.weather.WeatherType;
 import com.sk89q.worldedit.world.weather.WeatherTypes;
 import net.minecraft.block.Block;
-import net.minecraft.block.Blocks;
-import net.minecraft.block.LeavesBlock;
 import net.minecraft.block.entity.BlockEntity;
 import net.minecraft.entity.EntityType;
 import net.minecraft.entity.ItemEntity;
 import net.minecraft.item.ItemStack;
 import net.minecraft.item.ItemUsageContext;
+import net.minecraft.nbt.NbtOps;
+import net.minecraft.nbt.Tag;
 import net.minecraft.server.MinecraftServer;
-import net.minecraft.server.WorldGenerationProgressListener;
 import net.minecraft.server.world.ServerChunkManager;
 import net.minecraft.server.world.ServerWorld;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.Clearable;
 import net.minecraft.util.Hand;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.Util;
+import net.minecraft.util.dynamic.RegistryOps;
 import net.minecraft.util.hit.BlockHitResult;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Box;
 import net.minecraft.util.math.ChunkPos;
+import net.minecraft.util.registry.DynamicRegistryManager;
+import net.minecraft.util.registry.RegistryKey;
 import net.minecraft.world.World;
-import net.minecraft.world.WorldSaveHandler;
+import net.minecraft.world.WorldProperties;
-import net.minecraft.world.biome.DefaultBiomeFeatures;
+import net.minecraft.world.biome.source.BiomeAccessType;
+import net.minecraft.world.biome.source.BiomeArray;
+import net.minecraft.world.biome.source.HorizontalVoronoiBiomeAccessType;
 import net.minecraft.world.chunk.Chunk;
 import net.minecraft.world.chunk.ChunkManager;
 import net.minecraft.world.chunk.ChunkStatus;
 import net.minecraft.world.chunk.WorldChunk;
-import net.minecraft.world.gen.feature.BirchTreeFeature;
+import net.minecraft.world.dimension.DimensionOptions;
-import net.minecraft.world.gen.feature.DarkOakTreeFeature;
+import net.minecraft.world.gen.GeneratorOptions;
-import net.minecraft.world.gen.feature.DefaultFeatureConfig;
+import net.minecraft.world.gen.feature.ConfiguredFeature;
-import net.minecraft.world.gen.feature.Feature;
+import net.minecraft.world.gen.feature.ConfiguredFeatures;
-import net.minecraft.world.gen.feature.FeatureConfig;
+import net.minecraft.world.level.ServerWorldProperties;
-import net.minecraft.world.gen.feature.HugeBrownMushroomFeature;
+import net.minecraft.world.level.storage.LevelStorage;
-import net.minecraft.world.gen.feature.HugeRedMushroomFeature;
-import net.minecraft.world.gen.feature.JungleGroundBushFeature;
-import net.minecraft.world.gen.feature.JungleTreeFeature;
-import net.minecraft.world.gen.feature.LargeOakTreeFeature;
-import net.minecraft.world.gen.feature.MegaJungleTreeFeature;
-import net.minecraft.world.gen.feature.MegaPineTreeFeature;
-import net.minecraft.world.gen.feature.OakTreeFeature;
-import net.minecraft.world.gen.feature.PineTreeFeature;
-import net.minecraft.world.gen.feature.PlantedFeatureConfig;
-import net.minecraft.world.gen.feature.SavannaTreeFeature;
-import net.minecraft.world.gen.feature.SpruceTreeFeature;
-import net.minecraft.world.gen.feature.SwampTreeFeature;
-import net.minecraft.world.level.LevelProperties;
 
-import java.io.File;
 import java.lang.ref.WeakReference;
+import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
-import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
 import java.util.Optional;
-import java.util.OptionalInt;
 import java.util.Random;
 import java.util.Set;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ThreadLocalRandom;
-import java.util.stream.Collectors;
-
 import javax.annotation.Nullable;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.base.Preconditions.checkState;
+
 /**
  * An adapter to Minecraft worlds for WorldEdit.
  */
 public class FabricWorld 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 Identifier getDimensionRegistryKey(World world) {
-    private static final net.minecraft.block.BlockState JUNGLE_LEAF = Blocks.JUNGLE_LEAVES.getDefaultState().with(LeavesBlock.PERSISTENT, Boolean.TRUE);
+        return Objects.requireNonNull(world.getServer(), "server cannot be null")
-    private static final net.minecraft.block.BlockState JUNGLE_SHRUB = Blocks.OAK_LEAVES.getDefaultState().with(LeavesBlock.PERSISTENT, Boolean.TRUE);
+            .getRegistryManager()
+            .getDimensionTypes()
+            .getId(world.getDimension());
+    }
 
     private final WeakReference<World> worldRef;
     private final FabricWorldNativeAccess worldNativeAccess;
@@ -143,21 +153,6 @@ public class FabricWorld extends AbstractWorld {
         this.worldNativeAccess = new FabricWorldNativeAccess(worldRef);
     }
 
-    /**
-     * Get the underlying handle to the world.
-     *
-     * @return the world
-     * @throws WorldEditException thrown if a reference to the world was lost (i.e. world was unloaded)
-     */
-    public World getWorldChecked() throws WorldEditException {
-        World world = worldRef.get();
-        if (world != null) {
-            return world;
-        } else {
-            throw new WorldReferenceLostException("The reference to the world was lost (i.e. the world may have been unloaded)");
-        }
-    }
-
     /**
      * Get the underlying handle to the world.
      *
@@ -175,32 +170,46 @@ public class FabricWorld extends AbstractWorld {
 
     @Override
     public String getName() {
-        return getWorld().getLevelProperties().getLevelName();
+        WorldProperties levelProperties = getWorld().getLevelProperties();
+        return ((ServerWorldProperties) levelProperties).getLevelName();
     }
 
     @Override
     public String getId() {
-        return getWorld().getLevelProperties().getLevelName()
+        return getName() + "_" + getDimensionRegistryKey(getWorld());
-                .replace(" ", "_").toLowerCase(Locale.ROOT)
+    }
-                + getWorld().dimension.getType().getSuffix();
+
+    @Override
+    public void refreshChunk(int chunkX, int chunkZ) {
+
+    }
+
+    @Override
+    public IChunkGet get(int x, int z) {
+        return null;
+    }
+
+    @Override
+    public void sendFakeChunk(@Nullable Player player, ChunkPacket packet) {
+
     }
 
     @Override
     public Path getStoragePath() {
         final World world = getWorld();
-        if (world instanceof ServerWorld) {
+        MinecraftServer server = world.getServer();
-            return ((ServerWorld) world).getSaveHandler().getWorldDir().toPath();
+        checkState(server instanceof ExtendedMinecraftServer, "Need a server world");
-        }
+        return ((ExtendedMinecraftServer) server).getStoragePath(world);
-        return null;
     }
 
     @Override
     public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, SideEffectSet sideEffects) throws WorldEditException {
+        clearContainerBlockContents(position);
         return worldNativeAccess.setBlock(position, block, sideEffects);
     }
 
     @Override
-    public Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet) throws WorldEditException {
+    public Set<SideEffect> applySideEffects(BlockVector3 position, BlockState previousType, SideEffectSet sideEffectSet) {
         worldNativeAccess.applySideEffects(position, previousType, sideEffectSet);
         return Sets.intersection(FabricWorldEdit.inst.getPlatform().getSupportedSideEffects(), sideEffectSet.getSideEffectsToApply());
     }
@@ -223,21 +232,37 @@ public class FabricWorld extends AbstractWorld {
     }
 
     @Override
-    public BiomeType getBiome(BlockVector2 position) {
+    public boolean setTile(int x, int y, int z, CompoundTag tile) throws WorldEditException {
-        checkNotNull(position);
+        return false;
-        return FabricAdapter.adapt(getWorld().getBiome(new BlockPos(position.getBlockX(), 0, position.getBlockZ())));
     }
 
     @Override
-    public boolean setBiome(BlockVector2 position, BiomeType biome) {
+    public boolean fullySupports3DBiomes() {
+        BiomeAccessType biomeAccessType = getWorld().getDimension().getBiomeAccessType();
+        return !(biomeAccessType instanceof HorizontalVoronoiBiomeAccessType);
+    }
+
+    @Override
+    public BiomeType getBiome(BlockVector3 position) {
+        checkNotNull(position);
+        Chunk chunk = getWorld().getChunk(position.getX() >> 4, position.getZ() >> 4);
+        return getBiomeInChunk(position, chunk);
+    }
+
+    private BiomeType getBiomeInChunk(BlockVector3 position, Chunk chunk) {
+        BiomeArray biomeArray = checkNotNull(chunk.getBiomeArray());
+        return FabricAdapter.adapt(biomeArray.getBiomeForNoiseGen(position.getX() >> 2, position.getY() >> 2, position.getZ() >> 2));
+    }
+
+    @Override
+    public boolean setBiome(BlockVector3 position, BiomeType biome) {
         checkNotNull(position);
         checkNotNull(biome);
 
-        Chunk chunk = getWorld().getChunk(position.getBlockX() >> 4, position.getBlockZ() >> 4, ChunkStatus.FULL, false);
+        Chunk chunk = getWorld().getChunk(position.getBlockX() >> 4, position.getBlockZ() >> 4);
-        if (chunk == null) {
+        MutableBiomeArray biomeArray = MutableBiomeArray.inject(checkNotNull(chunk.getBiomeArray()));
-            return false;
+        biomeArray.setBiome(position.getX(), position.getY(), position.getZ(), FabricAdapter.adapt(biome));
-        }
+        chunk.setShouldSave(true);
-        chunk.getBiomeArray()[((position.getBlockZ() & 0xF) << 4 | position.getBlockX() & 0xF)] = FabricAdapter.adapt(biome);
         return true;
     }
 
@@ -255,7 +280,7 @@ public class FabricWorld extends AbstractWorld {
             return false;
         }
         fakePlayer.setStackInHand(Hand.MAIN_HAND, stack);
-        fakePlayer.setPositionAndAngles(position.getBlockX(), position.getBlockY(), position.getBlockZ(),
+        fakePlayer.updatePositionAndAngles(position.getBlockX(), position.getBlockY(), position.getBlockZ(),
                 (float) face.toVector().toYaw(), (float) face.toVector().toPitch());
         final BlockPos blockPos = FabricAdapter.toBlockPos(position);
         final BlockHitResult rayTraceResult = new BlockHitResult(FabricAdapter.toVec3(position),
@@ -264,11 +289,10 @@ public class FabricWorld extends AbstractWorld {
         ActionResult used = stack.useOnBlock(itemUseContext);
         if (used != ActionResult.SUCCESS) {
             // try activating the block
-            if (getWorld().getBlockState(blockPos).activate(world, fakePlayer, Hand.MAIN_HAND, rayTraceResult)) {
+            used = getWorld().getBlockState(blockPos).onUse(world, fakePlayer, Hand.MAIN_HAND, rayTraceResult);
-                used = ActionResult.SUCCESS;
-            } else {
-                used = stack.getItem().use(world, fakePlayer, Hand.MAIN_HAND).getResult();
         }
+        if (used != ActionResult.SUCCESS) {
+            used = stack.use(world, fakePlayer, Hand.MAIN_HAND).getResult();
         }
         return used == ActionResult.SUCCESS;
     }
@@ -295,84 +319,181 @@ public class FabricWorld extends AbstractWorld {
 
     @Override
     public boolean regenerate(Region region, EditSession editSession) {
-        // Don't even try to regen if it's going to fail.
-        ChunkManager provider = getWorld().getChunkManager();
-        if (!(provider instanceof ServerChunkManager)) {
         return false;
     }
 
-        File saveFolder = Files.createTempDir();
+    private void doRegen(Region region, Extent extent, RegenOptions options) throws Exception {
-        // register this just in case something goes wrong
+        Path tempDir = Files.createTempDirectory("WorldEditWorldGen");
-        // normally it should be deleted at the end of this method
+        LevelStorage levelStorage = LevelStorage.create(tempDir);
-        saveFolder.deleteOnExit();
+        try (LevelStorage.Session session = levelStorage.createSession("WorldEditTempGen")) {
-        try {
             ServerWorld originalWorld = (ServerWorld) getWorld();
+            long seed = options.getSeed().orElse(originalWorld.getSeed());
+            AccessorLevelProperties levelProperties = (AccessorLevelProperties)
+                originalWorld.getServer().getSaveProperties();
+            GeneratorOptions originalOpts = levelProperties.getGeneratorOptions();
 
-            MinecraftServer server = originalWorld.getServer();
+            RegistryOps<Tag> nbtRegOps = RegistryOps.of(
-            WorldSaveHandler saveHandler = new WorldSaveHandler(saveFolder, originalWorld.getSaveHandler().getWorldDir().getName(), server, server.getDataFixer());
+                NbtOps.INSTANCE,
-            World freshWorld = new ServerWorld(server, server.getWorkerExecutor(), saveHandler, originalWorld.getLevelProperties(),
+                ((ExtendedMinecraftServer) originalWorld.getServer())
-                    originalWorld.dimension.getType(), originalWorld.getProfiler(), new NoOpChunkStatusListener());
+                    .getServerResourceManager().getResourceManager(),
-
+                (DynamicRegistryManager.Impl) originalWorld.getServer().getRegistryManager()
-            // Pre-gen all the chunks
+            );
-            // We need to also pull one more chunk in every direction
+            GeneratorOptions newOpts = GeneratorOptions.CODEC
-            CuboidRegion expandedPreGen = new CuboidRegion(region.getMinimumPoint().subtract(16, 0, 16), region.getMaximumPoint().add(16, 0, 16));
+                .encodeStart(nbtRegOps, originalOpts)
-            for (BlockVector2 chunk : expandedPreGen.getChunks()) {
+                .flatMap(tag ->
-                freshWorld.getChunk(chunk.getBlockX(), chunk.getBlockZ());
+                    GeneratorOptions.CODEC.parse(
+                        recursivelySetSeed(new Dynamic<>(nbtRegOps, tag), seed, new HashSet<>())
+                    )
+                )
+                .get().map(
+                    l -> l,
+                    error -> {
+                        throw new IllegalStateException("Unable to map GeneratorOptions: " + error.message());
                     }
+                );
 
-            FabricWorld from = new FabricWorld(freshWorld);
+            levelProperties.setGeneratorOptions(newOpts);
-            for (BlockVector3 vec : region) {
+            RegistryKey<World> worldRegKey = originalWorld.getRegistryKey();
-                editSession.setBlock(vec, from.getFullBlock(vec));
+            DimensionOptions dimGenOpts = newOpts.getDimensions().get(worldRegKey.getValue());
+            checkNotNull(dimGenOpts, "No DimensionOptions for %s", worldRegKey);
+            try (ServerWorld serverWorld = new ServerWorld(
+                originalWorld.getServer(), Util.getMainWorkerExecutor(), session,
+                ((ServerWorldProperties) originalWorld.getLevelProperties()),
+                worldRegKey,
+                originalWorld.getDimension(),
+                new WorldEditGenListener(),
+                dimGenOpts.getChunkGenerator(),
+                originalWorld.isDebugWorld(),
+                seed,
+                // No spawners are needed for this world.
+                ImmutableList.of(),
+                // This controls ticking, we don't need it so set it to false.
+                false
+            )) {
+                regenForWorld(region, extent, serverWorld, options);
+
+                // drive the server executor until all tasks are popped off
+                while (originalWorld.getServer().runTask()) {
+                    Thread.yield();
                 }
-        } catch (MaxChangedBlocksException e) {
-            throw new RuntimeException(e);
             } finally {
-            saveFolder.delete();
+                levelProperties.setGeneratorOptions(originalOpts);
+            }
+        } finally {
+            SafeFiles.tryHardToDeleteDir(tempDir);
+        }
     }
 
-        return true;
+    @SuppressWarnings("unchecked")
+    private Dynamic<Tag> recursivelySetSeed(Dynamic<Tag> dynamic, long seed, Set<Dynamic<Tag>> seen) {
+        if (!seen.add(dynamic)) {
+            return dynamic;
+        }
+        return dynamic.updateMapValues(pair -> {
+            if (pair.getFirst().asString("").equals("seed")) {
+                return pair.mapSecond(v -> v.createLong(seed));
+            }
+            if (pair.getSecond().getValue() instanceof net.minecraft.nbt.CompoundTag) {
+                return pair.mapSecond(v -> recursivelySetSeed((Dynamic<Tag>) v, seed, seen));
+            }
+            return pair;
+        });
+    }
+
+    private void regenForWorld(Region region, Extent extent, ServerWorld serverWorld,
+                               RegenOptions options) throws WorldEditException {
+        List<CompletableFuture<Chunk>> chunkLoadings = submitChunkLoadTasks(region, serverWorld);
+
+        // drive executor until loading finishes
+        ((AccessorServerChunkManager) serverWorld.getChunkManager()).getMainThreadExecutor()
+            .runTasks(() -> {
+                // bail out early if a future fails
+                if (chunkLoadings.stream().anyMatch(ftr ->
+                    ftr.isDone() && Futures.getUnchecked(ftr) == null
+                )) {
+                    return false;
+                }
+                return chunkLoadings.stream().allMatch(CompletableFuture::isDone);
+            });
+
+        Map<ChunkPos, Chunk> chunks = new HashMap<>();
+        for (CompletableFuture<Chunk> future : chunkLoadings) {
+            @Nullable
+            Chunk chunk = future.getNow(null);
+            checkState(chunk != null, "Failed to generate a chunk, regen failed.");
+            chunks.put(chunk.getPos(), chunk);
+        }
+
+        for (BlockVector3 vec : region) {
+            BlockPos pos = FabricAdapter.toBlockPos(vec);
+            Chunk chunk = chunks.get(new ChunkPos(pos));
+            BlockStateHolder<?> state = FabricAdapter.adapt(chunk.getBlockState(pos));
+            BlockEntity blockEntity = chunk.getBlockEntity(pos);
+            if (blockEntity != null) {
+                net.minecraft.nbt.CompoundTag tag = new net.minecraft.nbt.CompoundTag();
+                blockEntity.toTag(tag);
+                state = state.toBaseBlock(NBTConverter.fromNative(tag));
+            }
+            extent.setBlock(vec, state.toBaseBlock());
+
+            if (options.shouldRegenBiomes()) {
+                BiomeType biome = getBiomeInChunk(vec, chunk);
+                extent.setBiome(vec, biome);
+            }
+        }
+    }
+
+    private List<CompletableFuture<Chunk>> submitChunkLoadTasks(Region region, ServerWorld world) {
+        AccessorServerChunkManager chunkManager = (AccessorServerChunkManager) world.getChunkManager();
+        List<CompletableFuture<Chunk>> chunkLoadings = new ArrayList<>();
+        // Pre-gen all the chunks
+        for (BlockVector2 chunk : region.getChunks()) {
+            chunkLoadings.add(
+                chunkManager.callGetChunkFuture(chunk.getX(), chunk.getZ(), ChunkStatus.FEATURES, true)
+                    .thenApply(either -> either.left().orElse(null))
+            );
+        }
+        return chunkLoadings;
     }
 
     @Nullable
-    private static Feature<? extends FeatureConfig> createTreeFeatureGenerator(TreeType type) {
+    private static ConfiguredFeature<?, ?> createTreeFeatureGenerator(TreeType type) {
         switch (type) {
-            case TREE: return new OakTreeFeature(DefaultFeatureConfig::deserialize, true);
+            // Based off of the SaplingGenerator class, as well as uses of DefaultBiomeFeatures fields
-            case BIG_TREE: return new LargeOakTreeFeature(DefaultFeatureConfig::deserialize, true);
+            case TREE: return ConfiguredFeatures.OAK;
-            case REDWOOD: return new PineTreeFeature(DefaultFeatureConfig::deserialize);
+            case BIG_TREE: return ConfiguredFeatures.FANCY_OAK;
-            case TALL_REDWOOD: return new SpruceTreeFeature(DefaultFeatureConfig::deserialize, true);
+            case REDWOOD: return ConfiguredFeatures.SPRUCE;
-            case BIRCH: return new BirchTreeFeature(DefaultFeatureConfig::deserialize, true, false);
+            case TALL_REDWOOD: return ConfiguredFeatures.MEGA_SPRUCE;
-            case JUNGLE: return new MegaJungleTreeFeature(DefaultFeatureConfig::deserialize, true, 10, 20, JUNGLE_LOG, JUNGLE_LEAF);
+            case MEGA_REDWOOD: return ConfiguredFeatures.MEGA_PINE;
-            case SMALL_JUNGLE: return new JungleTreeFeature(DefaultFeatureConfig::deserialize, true, 4 + random.nextInt(7), JUNGLE_LOG, JUNGLE_LEAF, false);
+            case BIRCH: return ConfiguredFeatures.BIRCH;
-            case SHORT_JUNGLE: return new JungleTreeFeature(DefaultFeatureConfig::deserialize, true, 4 + random.nextInt(7), JUNGLE_LOG, JUNGLE_LEAF, true);
+            case JUNGLE: return ConfiguredFeatures.MEGA_JUNGLE_TREE;
-            case JUNGLE_BUSH: return new JungleGroundBushFeature(DefaultFeatureConfig::deserialize, JUNGLE_LOG, JUNGLE_SHRUB);
+            case SMALL_JUNGLE: return ConfiguredFeatures.JUNGLE_TREE;
-            case SWAMP: return new SwampTreeFeature(DefaultFeatureConfig::deserialize);
+            case SHORT_JUNGLE: return ConfiguredFeatures.JUNGLE_TREE_NO_VINE;
-            case ACACIA: return new SavannaTreeFeature(DefaultFeatureConfig::deserialize, true);
+            case JUNGLE_BUSH: return ConfiguredFeatures.JUNGLE_BUSH;
-            case DARK_OAK: return new DarkOakTreeFeature(DefaultFeatureConfig::deserialize, true);
+            case SWAMP: return ConfiguredFeatures.SWAMP_TREE;
-            case MEGA_REDWOOD: return new MegaPineTreeFeature(DefaultFeatureConfig::deserialize, true, random.nextBoolean());
+            case ACACIA: return ConfiguredFeatures.ACACIA;
-            case TALL_BIRCH: return new BirchTreeFeature(DefaultFeatureConfig::deserialize, true, true);
+            case DARK_OAK: return ConfiguredFeatures.DARK_OAK;
-            case RED_MUSHROOM: return new HugeRedMushroomFeature(PlantedFeatureConfig::deserialize);
+            case TALL_BIRCH: return ConfiguredFeatures.BIRCH_TALL;
-            case BROWN_MUSHROOM: return new HugeBrownMushroomFeature(PlantedFeatureConfig::deserialize);
+            case RED_MUSHROOM: return ConfiguredFeatures.HUGE_RED_MUSHROOM;
+            case BROWN_MUSHROOM: return ConfiguredFeatures.HUGE_BROWN_MUSHROOM;
+            case WARPED_FUNGUS: return ConfiguredFeatures.WARPED_FUNGI;
+            case CRIMSON_FUNGUS: return ConfiguredFeatures.CRIMSON_FUNGI;
+            case CHORUS_PLANT: return ConfiguredFeatures.CHORUS_PLANT;
             case RANDOM: return createTreeFeatureGenerator(TreeType.values()[ThreadLocalRandom.current().nextInt(TreeType.values().length)]);
             default:
                 return null;
         }
     }
 
-    private FeatureConfig createFeatureConfig(TreeType type) {
-        if (type == TreeType.RED_MUSHROOM || type == TreeType.BROWN_MUSHROOM) {
-            return new PlantedFeatureConfig(true);
-        } else {
-            return new DefaultFeatureConfig();
-        }
-    }
-
     @Override
-    public boolean generateTree(TreeType type, EditSession editSession, BlockVector3 position) throws MaxChangedBlocksException {
+    public boolean generateTree(TreeType type, EditSession editSession, BlockVector3 position) {
-        @SuppressWarnings("unchecked")
+        ConfiguredFeature<?, ?> generator = createTreeFeatureGenerator(type);
-        Feature<FeatureConfig> generator = (Feature<FeatureConfig>) createTreeFeatureGenerator(type);
+        ServerWorld world = (ServerWorld) getWorld();
-        return generator != null
+        ServerChunkManager chunkManager = world.getChunkManager();
-                && generator.generate(getWorld(), getWorld().getChunkManager().getChunkGenerator(), random,
+        return generator != null && generator.generate(
-                FabricAdapter.toBlockPos(position), createFeatureConfig(type));
+            world, chunkManager.getChunkGenerator(), random,
+            FabricAdapter.toBlockPos(position)
+        );
     }
 
     @Override
@@ -389,19 +510,22 @@ public class FabricWorld extends AbstractWorld {
     public void fixLighting(Iterable<BlockVector2> chunks) {
         World world = getWorld();
         for (BlockVector2 chunk : chunks) {
-            world.getChunkManager().getLightingProvider().suppressLight(new ChunkPos(chunk.getBlockX(), chunk.getBlockZ()), true);
+            world.getChunkManager().getLightingProvider().setColumnEnabled(
+                new ChunkPos(chunk.getBlockX(), chunk.getBlockZ()), true
+            );
         }
     }
 
     @Override
     public boolean playEffect(Vector3 position, int type, int data) {
-        getWorld().playLevelEvent(type, FabricAdapter.toBlockPos(position.toBlockPoint()), data);
+        // TODO update sound API
+        // getWorld().playSound(type, FabricAdapter.toBlockPos(position.toBlockPoint()), data);
         return true;
     }
 
     @Override
     public WeatherType getWeather() {
-        LevelProperties info = getWorld().getLevelProperties();
+        WorldProperties info = getWorld().getLevelProperties();
         if (info.isThundering()) {
             return WeatherTypes.THUNDER_STORM;
         }
@@ -413,7 +537,7 @@ public class FabricWorld extends AbstractWorld {
 
     @Override
     public long getRemainingWeatherDuration() {
-        LevelProperties info = getWorld().getLevelProperties();
+        ServerWorldProperties info = (ServerWorldProperties) getWorld().getLevelProperties();
         if (info.isThundering()) {
             return info.getThunderTime();
         }
@@ -430,7 +554,7 @@ public class FabricWorld extends AbstractWorld {
 
     @Override
     public void setWeather(WeatherType weatherType, long duration) {
-        LevelProperties info = getWorld().getLevelProperties();
+        ServerWorldProperties info = (ServerWorldProperties) getWorld().getLevelProperties();
         if (weatherType == WeatherTypes.THUNDER_STORM) {
             info.setClearWeatherTime(0);
             info.setThundering(true);
@@ -453,7 +577,12 @@ public class FabricWorld extends AbstractWorld {
 
     @Override
     public BlockVector3 getSpawnPosition() {
-        return FabricAdapter.adapt(getWorld().getSpawnPos());
+        WorldProperties worldProps = getWorld().getLevelProperties();
+        return BlockVector3.at(
+            worldProps.getSpawnX(),
+            worldProps.getSpawnY(),
+            worldProps.getSpawnZ()
+        );
     }
 
     @Override
@@ -507,13 +636,19 @@ public class FabricWorld extends AbstractWorld {
     @Override
     public List<? extends Entity> getEntities(Region region) {
         final World world = getWorld();
-        if (!(world instanceof ServerWorld)) {
+        Box box = new Box(
-            return Collections.emptyList();
+            FabricAdapter.toBlockPos(region.getMinimumPoint()),
-        }
+            FabricAdapter.toBlockPos(region.getMaximumPoint().add(BlockVector3.ONE))
-        return ((ServerWorld) world).getEntities(null, entity -> true)
+        );
-                .stream()
+        List<net.minecraft.entity.Entity> nmsEntities = world.getEntitiesByType(
-                .filter(e -> region.contains(FabricAdapter.adapt(e.getBlockPos())))
+            null,
-                .map(FabricEntity::new).collect(Collectors.toList());
+            box,
+            e -> region.contains(FabricAdapter.adapt(e.getBlockPos()))
+        );
+        return ImmutableList.copyOf(Lists.transform(
+            nmsEntities,
+            FabricEntity::new
+        ));
     }
 
     @Override
@@ -522,10 +657,10 @@ public class FabricWorld extends AbstractWorld {
         if (!(world instanceof ServerWorld)) {
             return Collections.emptyList();
         }
-        return ((ServerWorld) world).getEntities(null, entity -> true)
+        return ImmutableList.copyOf(Iterables.transform(
-                .stream()
+            ((ServerWorld) world).iterateEntities(),
-                .map(FabricEntity::new)
+            FabricEntity::new
-                .collect(Collectors.toList());
+        ));
     }
 
     @Nullable
@@ -533,7 +668,9 @@ public class FabricWorld extends AbstractWorld {
     public Entity createEntity(Location location, BaseEntity entity) {
         World world = getWorld();
         final Optional<EntityType<?>> entityType = EntityType.get(entity.getType().getId());
-        if (!entityType.isPresent()) return null;
+        if (!entityType.isPresent()) {
+            return null;
+        }
         net.minecraft.entity.Entity createdEntity = entityType.get().create(world);
         if (createdEntity != null) {
             CompoundTag nativeTag = entity.getNbtData();
@@ -545,7 +682,7 @@ public class FabricWorld extends AbstractWorld {
                 createdEntity.fromTag(tag);
             }
 
-            createdEntity.setPositionAndAngles(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
+            createdEntity.updatePositionAndAngles(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
 
             world.spawnEntity(createdEntity);
             return new FabricEntity(createdEntity);
@@ -554,27 +691,4 @@ public class FabricWorld extends AbstractWorld {
         }
     }
 
-    /**
-     * Thrown when the reference to the world is lost.
-     */
-    @SuppressWarnings("serial")
-    private static final class WorldReferenceLostException extends WorldEditException {
-        private WorldReferenceLostException(String message) {
-            super(message);
-        }
-    }
-
-    private static class NoOpChunkStatusListener implements WorldGenerationProgressListener {
-        @Override
-        public void start(ChunkPos chunkPos) {
-        }
-
-        @Override
-        public void setChunkStatus(ChunkPos chunkPos, @Nullable ChunkStatus chunkStatus) {
-        }
-
-        @Override
-        public void stop() {
-        }
-    }
 }

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

@@ -19,13 +19,13 @@
 
 package com.sk89q.worldedit.fabric;
 
-import static com.google.common.base.Preconditions.checkNotNull;
+import com.mojang.brigadier.CommandDispatcher;
-import static com.sk89q.worldedit.fabric.FabricAdapter.adaptPlayer;
-
 import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.event.platform.PlatformReadyEvent;
+import com.sk89q.worldedit.extension.platform.Capability;
 import com.sk89q.worldedit.extension.platform.Platform;
+import com.sk89q.worldedit.extension.platform.PlatformManager;
 import com.sk89q.worldedit.fabric.net.handler.WECUIPacketHandler;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.world.biome.BiomeType;
@@ -35,22 +35,25 @@ import com.sk89q.worldedit.world.entity.EntityType;
 import com.sk89q.worldedit.world.item.ItemCategory;
 import com.sk89q.worldedit.world.item.ItemType;
 import net.fabricmc.api.ModInitializer;
+import net.fabricmc.fabric.api.command.v1.CommandRegistrationCallback;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents;
 import net.fabricmc.fabric.api.event.player.AttackBlockCallback;
 import net.fabricmc.fabric.api.event.player.UseBlockCallback;
 import net.fabricmc.fabric.api.event.player.UseItemCallback;
-import net.fabricmc.fabric.api.event.server.ServerStartCallback;
-import net.fabricmc.fabric.api.event.server.ServerStopCallback;
-import net.fabricmc.fabric.api.event.server.ServerTickCallback;
 import net.fabricmc.loader.api.FabricLoader;
 import net.fabricmc.loader.api.ModContainer;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.ItemStack;
 import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.command.ServerCommandSource;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.tag.BlockTags;
 import net.minecraft.tag.ItemTags;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.Hand;
 import net.minecraft.util.Identifier;
+import net.minecraft.util.TypedActionResult;
 import net.minecraft.util.hit.BlockHitResult;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Direction;
@@ -65,6 +68,9 @@ import java.io.UncheckedIOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.sk89q.worldedit.fabric.FabricAdapter.adaptPlayer;
+
 /**
  * The Fabric implementation of WorldEdit.
  */
@@ -95,7 +101,7 @@ public class FabricWorldEdit implements ModInitializer {
         );
 
         // Setup working directory
-        workingDir = new File(FabricLoader.getInstance().getConfigDirectory(), "worldedit").toPath();
+        workingDir = FabricLoader.getInstance().getConfigDir().resolve("worldedit");
         if (!Files.exists(workingDir)) {
             try {
                 Files.createDirectory(workingDir);
@@ -106,15 +112,34 @@ public class FabricWorldEdit implements ModInitializer {
 
         WECUIPacketHandler.init();
 
-        ServerTickCallback.EVENT.register(ThreadSafeCache.getInstance());
+        ServerTickEvents.END_SERVER_TICK.register(ThreadSafeCache.getInstance());
-        ServerStartCallback.EVENT.register(this::onStartServer);
+        CommandRegistrationCallback.EVENT.register(this::registerCommands);
-        ServerStopCallback.EVENT.register(this::onStopServer);
+        ServerLifecycleEvents.SERVER_STARTED.register(this::onStartServer);
+        ServerLifecycleEvents.SERVER_STOPPING.register(this::onStopServer);
         AttackBlockCallback.EVENT.register(this::onLeftClickBlock);
         UseBlockCallback.EVENT.register(this::onRightClickBlock);
         UseItemCallback.EVENT.register(this::onRightClickAir);
         LOGGER.info("WorldEdit for Fabric (version " + getInternalVersion() + ") is loaded");
     }
 
+    private void registerCommands(CommandDispatcher<ServerCommandSource> dispatcher, boolean dedicated) {
+        PlatformManager manager = WorldEdit.getInstance().getPlatformManager();
+        if (manager.getPlatforms().isEmpty()) {
+            // We'll register as part of our platform initialization later.
+            return;
+        }
+
+        // This is a re-register (due to /reload), we must add our commands now
+
+        Platform commandsPlatform = manager.queryCapability(Capability.USER_COMMANDS);
+        if (commandsPlatform != platform || !platform.isHookingEvents()) {
+            // We're not in control of commands/events -- do not re-register.
+            return;
+        }
+        platform.setNativeDispatcher(dispatcher);
+        platform.registerCommands(manager.getPlatformCommandManager().getCommandManager());
+    }
+
     private void setupPlatform(MinecraftServer server) {
         this.platform = new FabricPlatform(this, server);
 
@@ -123,14 +148,13 @@ public class FabricWorldEdit implements ModInitializer {
         this.provider = new FabricPermissionsProvider.VanillaPermissionsProvider(platform);
     }
 
-    private void setupRegistries() {
+    private void setupRegistries(MinecraftServer server) {
         // Blocks
-        for (Identifier name : Registry.BLOCK.getIds()) {
+        /*for (Identifier name : Registry.BLOCK.getIds()) {
             if (BlockType.REGISTRY.get(name.toString()) == null) {
-                BlockType.REGISTRY.register(name.toString(), new BlockType(name.toString(),
+                BlockType.REGISTRY.register(name.toString(), new BlockType(name.toString(), FabricAdapter.adapt(name));
-                    input -> FabricAdapter.adapt(FabricAdapter.adapt(input.getBlockType()).getDefaultState())));
-            }
             }
+        }*/
         // Items
         for (Identifier name : Registry.ITEM.getIds()) {
             if (ItemType.REGISTRY.get(name.toString()) == null) {
@@ -144,18 +168,18 @@ public class FabricWorldEdit implements ModInitializer {
             }
         }
         // Biomes
-        for (Identifier name : Registry.BIOME.getIds()) {
+        for (Identifier name : server.getRegistryManager().get(Registry.BIOME_KEY).getIds()) {
             if (BiomeType.REGISTRY.get(name.toString()) == null) {
                 BiomeType.REGISTRY.register(name.toString(), new BiomeType(name.toString()));
             }
         }
         // Tags
-        for (Identifier name : BlockTags.getContainer().getKeys()) {
+        for (Identifier name : BlockTags.getTagGroup().getTagIds()) {
             if (BlockCategory.REGISTRY.get(name.toString()) == null) {
                 BlockCategory.REGISTRY.register(name.toString(), new BlockCategory(name.toString()));
             }
         }
-        for (Identifier name : ItemTags.getContainer().getKeys()) {
+        for (Identifier name : ItemTags.getTagGroup().getTagIds()) {
             if (ItemCategory.REGISTRY.get(name.toString()) == null) {
                 ItemCategory.REGISTRY.register(name.toString(), new ItemCategory(name.toString()));
             }
@@ -163,12 +187,16 @@ public class FabricWorldEdit implements ModInitializer {
     }
 
     private void onStartServer(MinecraftServer minecraftServer) {
+        FabricAdapter.setServer(minecraftServer);
         setupPlatform(minecraftServer);
-        setupRegistries();
+        setupRegistries(minecraftServer);
 
         config = new FabricConfiguration(this);
         config.load();
         WorldEdit.getInstance().getEventBus().post(new PlatformReadyEvent());
+        minecraftServer.reloadResources(
+            minecraftServer.getDataPackManager().getEnabledNames()
+        );
     }
 
     private void onStopServer(MinecraftServer minecraftServer) {
@@ -198,8 +226,9 @@ public class FabricWorldEdit implements ModInitializer {
                 blockPos.getY(),
                 blockPos.getZ()
         );
+        com.sk89q.worldedit.util.Direction weDirection = FabricAdapter.adaptEnumFacing(direction);
 
-        if (we.handleBlockLeftClick(player, pos)) {
+        if (we.handleBlockLeftClick(player, pos, weDirection)) {
             return ActionResult.SUCCESS;
         }
 
@@ -210,12 +239,6 @@ public class FabricWorldEdit implements ModInitializer {
         return ActionResult.PASS;
     }
 
-    public void onLeftClickAir(PlayerEntity playerEntity, World world, Hand hand) {
-        WorldEdit we = WorldEdit.getInstance();
-        FabricPlayer player = adaptPlayer((ServerPlayerEntity) playerEntity);
-        we.handleArmSwing(player);
-    }
-
     private ActionResult onRightClickBlock(PlayerEntity playerEntity, World world, Hand hand, BlockHitResult blockHitResult) {
         if (shouldSkip() || hand == Hand.OFF_HAND || world.isClient) {
             return ActionResult.PASS;
@@ -229,8 +252,9 @@ public class FabricWorldEdit implements ModInitializer {
                 blockHitResult.getBlockPos().getY(),
                 blockHitResult.getBlockPos().getZ()
         );
+        com.sk89q.worldedit.util.Direction direction = FabricAdapter.adaptEnumFacing(blockHitResult.getSide());
 
-        if (we.handleBlockRightClick(player, pos)) {
+        if (we.handleBlockRightClick(player, pos, direction)) {
             return ActionResult.SUCCESS;
         }
 
@@ -241,19 +265,20 @@ public class FabricWorldEdit implements ModInitializer {
         return ActionResult.PASS;
     }
 
-    private ActionResult onRightClickAir(PlayerEntity playerEntity, World world, Hand hand) {
+    private TypedActionResult<ItemStack> onRightClickAir(PlayerEntity playerEntity, World world, Hand hand) {
+        ItemStack stackInHand = playerEntity.getStackInHand(hand);
         if (shouldSkip() || hand == Hand.OFF_HAND || world.isClient) {
-            return ActionResult.PASS;
+            return TypedActionResult.pass(stackInHand);
         }
 
         WorldEdit we = WorldEdit.getInstance();
         FabricPlayer player = adaptPlayer((ServerPlayerEntity) playerEntity);
 
         if (we.handleRightClick(player)) {
-            return ActionResult.SUCCESS;
+            return TypedActionResult.success(stackInHand);
         }
 
-        return ActionResult.PASS;
+        return TypedActionResult.pass(stackInHand);
     }
 
     // TODO Pass empty left click to server
@@ -303,8 +328,8 @@ public class FabricWorldEdit implements ModInitializer {
      *
      * @return the working directory
      */
-    public File getWorkingDir() {
+    public Path getWorkingDir() {
-        return this.workingDir.toFile();
+        return this.workingDir;
     }
 
     /**

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

@@ -19,14 +19,14 @@
 
 package com.sk89q.worldedit.fabric;
 
-import static com.google.common.base.Preconditions.checkArgument;
-
 import com.google.common.collect.ImmutableList;
 import com.sk89q.worldedit.registry.state.Property;
 
 import java.util.List;
 import java.util.Optional;
 
+import static com.google.common.base.Preconditions.checkArgument;
+
 class PropertyAdapter<T extends Comparable<T>> implements Property<T> {
 
     private final net.minecraft.state.property.Property<T> property;
@@ -49,7 +49,7 @@ class PropertyAdapter<T extends Comparable<T>> implements Property<T> {
 
     @Override
     public T getValueFor(String string) throws IllegalArgumentException {
-        Optional<T> val = property.getValue(string);
+        Optional<T> val = property.parse(string);
         checkArgument(val.isPresent(), "%s has no value for %s", getName(), string);
         return val.get();
     }

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

@@ -19,11 +19,10 @@
 
 package com.sk89q.worldedit.fabric;
 
-import net.fabricmc.fabric.api.event.server.ServerTickCallback;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.network.ServerPlayerEntity;
 
-import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
 import java.util.UUID;
@@ -32,11 +31,11 @@ import java.util.concurrent.CopyOnWriteArraySet;
 /**
  * Caches data that cannot be accessed from another thread safely.
  */
-public class ThreadSafeCache implements ServerTickCallback {
+public class ThreadSafeCache implements ServerTickEvents.EndTick {
 
     private static final long REFRESH_DELAY = 1000 * 30;
     private static final ThreadSafeCache INSTANCE = new ThreadSafeCache();
-    private Set<UUID> onlineIds = Collections.emptySet();
+    private Set<UUID> onlineIds = new CopyOnWriteArraySet<>();
     private long lastRefresh = 0;
 
     /**
@@ -49,7 +48,7 @@ public class ThreadSafeCache implements ServerTickCallback {
     }
 
     @Override
-    public void tick(MinecraftServer server) {
+    public void onEndTick(MinecraftServer server) {
         long now = System.currentTimeMillis();
 
         if (now - lastRefresh > REFRESH_DELAY) {

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

@@ -27,10 +27,9 @@ import net.minecraft.server.network.ServerPlayerInteractionManager;
 import net.minecraft.server.world.ServerWorld;
 import net.minecraft.stat.Stat;
 import net.minecraft.text.Text;
-import net.minecraft.world.dimension.DimensionType;
 
-import javax.annotation.Nullable;
 import java.util.UUID;
+import javax.annotation.Nullable;
 
 public class WorldEditFakePlayer extends ServerPlayerEntity {
     private static final GameProfile FAKE_WORLDEDIT_PROFILE = new GameProfile(UUID.nameUUIDFromBytes("worldedit".getBytes()), "[WorldEdit]");
@@ -52,17 +51,8 @@ public class WorldEditFakePlayer extends ServerPlayerEntity {
     }
 
     @Override
-    public void sendMessage(Text component) {
+    public void sendMessage(Text message, boolean actionBar) {
-    }
+        super.sendMessage(message, actionBar);
-
-    @Override
-    public void addChatMessage(Text component, boolean opt) {
-    }
-
-    @Nullable
-    @Override
-    public Entity changeDimension(DimensionType dimensionType) {
-        return this;
     }
 
     @Override

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

@@ -31,13 +31,15 @@ import net.minecraft.server.world.ServerChunkManager;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import net.minecraft.world.chunk.WorldChunk;
+import org.jetbrains.annotations.Nullable;
 
-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 static final int UPDATE = 1;
+    private static final int NOTIFY = 2;
 
     private final WeakReference<World> world;
 
@@ -75,7 +77,7 @@ public class FabricWorldNativeAccess implements WorldNativeAccess<WorldChunk, Bl
 
     @Override
     public BlockState getValidBlockForPosition(BlockState block, BlockPos position) {
-        return Block.getRenderingState(block, getWorld(), position);
+        return Block.postProcessState(block, getWorld(), position);
     }
 
     @Override
@@ -96,7 +98,7 @@ public class FabricWorldNativeAccess implements WorldNativeAccess<WorldChunk, Bl
             return false;
         }
         tileEntity.setLocation(getWorld(), position);
-        tileEntity.fromTag(nativeTag);
+        tileEntity.fromTag(getWorld().getBlockState(position), nativeTag);
         return true;
     }
 
@@ -119,17 +121,16 @@ public class FabricWorldNativeAccess implements WorldNativeAccess<WorldChunk, Bl
     public void notifyNeighbors(BlockPos pos, BlockState oldState, BlockState newState) {
         getWorld().updateNeighbors(pos, oldState.getBlock());
         if (newState.hasComparatorOutput()) {
-            getWorld().updateHorizontalAdjacent(pos, newState.getBlock());
+            getWorld().updateComparators(pos, newState.getBlock());
         }
     }
 
     @Override
-    public void updateNeighbors(BlockPos pos, BlockState oldState, BlockState newState) {
+    public void updateNeighbors(BlockPos pos, BlockState oldState, BlockState newState, int recursionLimit) {
         World world = getWorld();
-        // method_11637 = updateDiagonalNeighbors
+        oldState.prepare(world, pos, NOTIFY, recursionLimit);
-        oldState.method_11637(world, pos, NOTIFY);
+        newState.updateNeighbors(world, pos, NOTIFY, recursionLimit);
-        newState.updateNeighborStates(world, pos, NOTIFY);
+        newState.prepare(world, pos, NOTIFY, recursionLimit);
-        newState.method_11637(world, pos, NOTIFY);
     }
 
     @Override

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

@@ -28,6 +28,7 @@ import com.sk89q.jnbt.FloatTag;
 import com.sk89q.jnbt.IntArrayTag;
 import com.sk89q.jnbt.IntTag;
 import com.sk89q.jnbt.ListTag;
+import com.sk89q.jnbt.LongArrayTag;
 import com.sk89q.jnbt.LongTag;
 import com.sk89q.jnbt.ShortTag;
 import com.sk89q.jnbt.StringTag;
@@ -59,6 +60,9 @@ public final class NBTConverter {
         } else if (tag instanceof LongTag) {
             return toNative((LongTag) tag);
 
+        } else if (tag instanceof LongArrayTag) {
+            return toNative((LongArrayTag) tag);
+
         } else if (tag instanceof StringTag) {
             return toNative((StringTag) tag);
 
@@ -104,24 +108,27 @@ public final class NBTConverter {
     }
 
     public static net.minecraft.nbt.LongTag toNative(LongTag tag) {
-        return new net.minecraft.nbt.LongTag(tag.getValue());
+        return net.minecraft.nbt.LongTag.of(tag.getValue());
+    }
+
+    public static net.minecraft.nbt.LongArrayTag toNative(LongArrayTag tag) {
+        return new net.minecraft.nbt.LongArrayTag(tag.getValue().clone());
     }
 
     public static net.minecraft.nbt.StringTag toNative(StringTag tag) {
-        return new net.minecraft.nbt.StringTag(tag.getValue());
+        return net.minecraft.nbt.StringTag.of(tag.getValue());
     }
 
     public static net.minecraft.nbt.IntTag toNative(IntTag tag) {
-        return new net.minecraft.nbt.IntTag(tag.getValue());
+        return net.minecraft.nbt.IntTag.of(tag.getValue());
     }
 
     public static net.minecraft.nbt.ByteTag toNative(ByteTag tag) {
-        return new net.minecraft.nbt.ByteTag(tag.getValue());
+        return net.minecraft.nbt.ByteTag.of(tag.getValue());
     }
 
     public static net.minecraft.nbt.ByteArrayTag toNative(ByteArrayTag tag) {
-        byte[] value = tag.getValue();
+        return new net.minecraft.nbt.ByteArrayTag(tag.getValue().clone());
-        return new net.minecraft.nbt.ByteArrayTag(Arrays.copyOf(value, value.length));
     }
 
     public static net.minecraft.nbt.CompoundTag toNative(CompoundTag tag) {
@@ -133,15 +140,15 @@ public final class NBTConverter {
     }
 
     public static net.minecraft.nbt.FloatTag toNative(FloatTag tag) {
-        return new net.minecraft.nbt.FloatTag(tag.getValue());
+        return net.minecraft.nbt.FloatTag.of(tag.getValue());
     }
 
     public static net.minecraft.nbt.ShortTag toNative(ShortTag tag) {
-        return new net.minecraft.nbt.ShortTag(tag.getValue());
+        return net.minecraft.nbt.ShortTag.of(tag.getValue());
     }
 
     public static net.minecraft.nbt.DoubleTag toNative(DoubleTag tag) {
-        return new net.minecraft.nbt.DoubleTag(tag.getValue());
+        return net.minecraft.nbt.DoubleTag.of(tag.getValue());
     }
 
     public static Tag fromNative(net.minecraft.nbt.Tag other) {
@@ -157,6 +164,9 @@ public final class NBTConverter {
         } else if (other instanceof net.minecraft.nbt.LongTag) {
             return fromNative((net.minecraft.nbt.LongTag) other);
 
+        } else if (other instanceof net.minecraft.nbt.LongArrayTag) {
+            return fromNative((net.minecraft.nbt.LongArrayTag) other);
+
         } else if (other instanceof net.minecraft.nbt.StringTag) {
             return fromNative((net.minecraft.nbt.StringTag) other);
 
@@ -191,7 +201,7 @@ public final class NBTConverter {
     }
 
     public static ListTag fromNative(net.minecraft.nbt.ListTag other) {
-        other = (net.minecraft.nbt.ListTag) other.copy();
+        other = other.copy();
         List<Tag> list = new ArrayList<>();
         Class<? extends Tag> listClass = StringTag.class;
         int tags = other.size();
@@ -211,6 +221,10 @@ public final class NBTConverter {
         return new LongTag(other.getLong());
     }
 
+    public static LongArrayTag fromNative(net.minecraft.nbt.LongArrayTag other) {
+        return new LongArrayTag(other.getLongArray().clone());
+    }
+
     public static StringTag fromNative(net.minecraft.nbt.StringTag other) {
         return new StringTag(other.asString());
     }
@@ -224,15 +238,14 @@ public final class NBTConverter {
     }
 
     public static ByteArrayTag fromNative(net.minecraft.nbt.ByteArrayTag other) {
-        byte[] value = other.getByteArray();
+        return new ByteArrayTag(other.getByteArray().clone());
-        return new ByteArrayTag(Arrays.copyOf(value, value.length));
     }
 
     public static CompoundTag fromNative(net.minecraft.nbt.CompoundTag other) {
         Set<String> tags = other.getKeys();
         Map<String, Tag> map = new HashMap<>();
         for (String tagName : tags) {
-            map.put(tagName, fromNative(other.getTag(tagName)));
+            map.put(tagName, fromNative(other.get(tagName)));
         }
         return new CompoundTag(map);
     }

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/mixin/AccessorServerPlayerEntity.java

@@ -1,31 +0,0 @@
-/*
- * 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 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.sk89q.worldedit.fabric.mixin;
-
-import net.minecraft.server.network.ServerPlayerEntity;
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.gen.Accessor;
-
-@Mixin(ServerPlayerEntity.class)
-public interface AccessorServerPlayerEntity {
-
-    @Accessor
-    String getClientLanguage();
-}

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/mixin/MixinMinecraftServer.java

@@ -20,15 +20,22 @@
 package com.sk89q.worldedit.fabric.mixin;
 
 import com.sk89q.worldedit.extension.platform.Watchdog;
-import net.minecraft.server.ServerTask;
+import com.sk89q.worldedit.fabric.internal.ExtendedMinecraftServer;
+import net.minecraft.resource.ServerResourceManager;
 import net.minecraft.server.MinecraftServer;
-import net.minecraft.util.NonBlockingThreadExecutor;
+import net.minecraft.server.ServerTask;
-import net.minecraft.util.SystemUtil;
+import net.minecraft.util.Util;
+import net.minecraft.util.thread.ReentrantThreadExecutor;
+import net.minecraft.world.World;
+import net.minecraft.world.level.storage.LevelStorage;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+import java.nio.file.Path;
 
 @Mixin(MinecraftServer.class)
-public abstract class MixinMinecraftServer extends NonBlockingThreadExecutor<ServerTask> implements Watchdog {
+public abstract class MixinMinecraftServer extends ReentrantThreadExecutor<ServerTask> implements Watchdog, ExtendedMinecraftServer {
 
     public MixinMinecraftServer(String name) {
         super(name);
@@ -36,10 +43,20 @@ public abstract class MixinMinecraftServer extends NonBlockingThreadExecutor<Ser
 
     @Shadow
     private long timeReference;
+    @Shadow
+    protected LevelStorage.Session session;
 
     @Override
     public void tick() {
-        timeReference = SystemUtil.getMeasuringTimeMs();
+        timeReference = Util.getMeasuringTimeMs();
     }
 
+    @Override
+    public Path getStoragePath(World world) {
+        return session.getWorldDirectory(world.getRegistryKey()).toPath();
+    }
+
+    @Accessor()
+    @Override
+    public abstract ServerResourceManager getServerResourceManager();
 }

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/mixin/MixinServerPlayerEntity.java

@@ -20,11 +20,11 @@
 package com.sk89q.worldedit.fabric.mixin;
 
 import com.mojang.authlib.GameProfile;
-import com.sk89q.worldedit.fabric.FabricWorldEdit;
+import com.sk89q.worldedit.fabric.internal.ExtendedPlayerEntity;
-import net.minecraft.container.ContainerListener;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.network.packet.c2s.play.ClientSettingsC2SPacket;
 import net.minecraft.server.network.ServerPlayerEntity;
-import net.minecraft.util.Hand;
+import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
@@ -32,14 +32,23 @@ import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 @Mixin(ServerPlayerEntity.class)
-public abstract class MixinServerPlayerEntity extends PlayerEntity implements ContainerListener {
+public abstract class MixinServerPlayerEntity extends PlayerEntity implements ExtendedPlayerEntity {
 
-    public MixinServerPlayerEntity(World world, GameProfile gameProfile) {
+    private String language = "en_us";
-        super(world, gameProfile);
+
+    public MixinServerPlayerEntity(World world, BlockPos blockPos, float yaw, GameProfile gameProfile) {
+        super(world, blockPos, yaw, gameProfile);
     }
 
-    @Inject(method = "swingHand", at = @At(value = "HEAD"))
+    @Inject(method = "setClientSettings", at = @At(value = "HEAD"))
-    public void onSwing(Hand hand, CallbackInfo injectionInfo) {
+    public void setClientSettings(ClientSettingsC2SPacket clientSettingsC2SPacket,
-        FabricWorldEdit.inst.onLeftClickAir(this, this.world, hand);
+                                  CallbackInfo callbackInfo) {
+        this.language = ((AccessorClientSettingsC2SPacket) clientSettingsC2SPacket).getLanguage();
     }
+
+    @Override
+    public String getLanguage() {
+        return language;
+    }
+
 }

worldedit-fabric/src/main/resources/defaults/worldedit.properties

@@ -11,7 +11,6 @@ disallowed-blocks=minecraft:oak_sapling,minecraft:jungle_sapling,minecraft:dark_
 max-super-pickaxe-size=5
 max-brush-radius=10
 craftscript-dir=craftscripts
-no-double-slash=false
 wand-item=minecraft:wooden_axe
 shell-save-type=
 scripting-timeout=3000
@@ -20,6 +19,7 @@ use-inventory-creative-override=false
 log-file=worldedit.log
 log-format=[%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS %4$s]: %5$s%6$s%n
 max-changed-blocks=-1
+default-vertical-height=256
 nav-wand-distance=50
 butcher-default-radius=-1
 default-max-changed-blocks=-1

worldedit-fabric/src/main/resources/fabric.mod.json

@@ -9,7 +9,7 @@
         "sk89q",
         "wizjany",
         "TomyLobo",
-        "kenzierocks",
+        "octylFractal",
         "Me4502"
     ],
     "contact": {
@@ -30,11 +30,13 @@
     "depends": {
         "fabricloader": ">=0.4.0",
         "fabric-api-base": "*",
-        "fabric-events-lifecycle-v0": "*",
+        "fabric-command-api-v1": "*",
+        "fabric-lifecycle-events-v1": "*",
         "fabric-events-interaction-v0": "*",
         "fabric-networking-v0": "*"
     },
     "mixins": [
         "worldedit.mixins.json"
-    ]
+    ],
+    "accessWidener" : "worldedit.accesswidener"
 }

worldedit-fabric/src/main/resources/worldedit.accesswidener

@@ -0,0 +1,2 @@
+accessWidener v1 named
+accessible class net/minecraft/server/world/ServerChunkManager$MainThreadExecutor

worldedit-fabric/src/main/resources/worldedit.mixins.json

@@ -3,9 +3,12 @@
     "package": "com.sk89q.worldedit.fabric.mixin",
     "compatibilityLevel": "JAVA_8",
     "mixins": [
+        "MixinBiomeArray",
         "MixinServerPlayerEntity",
         "MixinMinecraftServer",
-        "AccessorServerPlayerEntity"
+        "AccessorClientSettingsC2SPacket",
+        "AccessorLevelProperties",
+        "AccessorServerChunkManager"
     ],
     "server": [
     ],

worldedit-forge/build.gradle.kts

@@ -12,12 +12,12 @@ plugins {
 applyPlatformAndCoreConfiguration()
 applyShadowConfiguration()
 
-val minecraftVersion = "1.16.2"
+val minecraftVersion = "1.16.3"
 val nextMajorMinecraftVersion: String = minecraftVersion.split('.').let { (useless, major) ->
     "$useless.${major.toInt() + 1}"
 }
 val mappingsMinecraftVersion = "1.16"
-val forgeVersion = "32.0.92"
+val forgeVersion = "34.0.0"
 
 configurations.all {
     resolutionStrategy {