feature(fabric): added fabric support (#491)

* Initial work towards Fabric compat. This does not compile yet

* Further updates - should compile but Gradle is being weird.

* Remove useless buildscript extras

* Added mixins to buildscript classpath to fix Loom crash

* Make it compile

* Got it building and added interaction

* Fixed review comments

* Use ServerPlayerEntity for FakePlayer

* Use method references for nicer names

* Fixed remaining comments and added networking for CUI

* Output as dist.jar

* Added mixins for left click air

* Use regex for cleanliness

build.gradle

@@ -30,7 +30,7 @@ println """
  1) Read COMPILING.md if you haven't yet
  2) Try running 'build' in a separate Gradle run
  3) Use gradlew and not gradle
- 4) If you still need help, ask on IRC! irc.esper.net #sk89q
+ 4) If you still need help, ask on Discord! https://discord.gg/enginehub
 
  Output files will be in [subproject]/build/libs
 *******************************************
@@ -85,7 +85,7 @@ subprojects {
     }
 }
 
-configure(['core', 'bukkit', 'forge', 'sponge'].collect { project(":worldedit-$it") }) {
+configure(['core', 'bukkit', 'forge', 'sponge', 'fabric'].collect { project(":worldedit-$it") }) {
     apply plugin: 'java'
     apply plugin: 'maven'
     apply plugin: 'checkstyle'
@@ -118,7 +118,7 @@ configure(['core', 'bukkit', 'forge', 'sponge'].collect { project(":worldedit-$i
         archives javadocJar
     }
 
-    if (!(name.equals('worldedit-forge') || name.equals('worldedit-sponge'))) {
+    if (name == "worldedit-core" || name == "worldedit-bukkit") {
         task sourcesJar(type: Jar, dependsOn: classes) {
             classifier = 'sources'
             from sourceSets.main.allSource
@@ -144,7 +144,7 @@ configure(['core', 'bukkit', 'forge', 'sponge'].collect { project(":worldedit-$i
     }
 }
 
-configure(['bukkit', 'forge', 'sponge'].collect { project(":worldedit-$it") }) {
+configure(['bukkit', 'forge', 'sponge', 'fabric'].collect { project(":worldedit-$it") }) {
     shadowJar {
         classifier 'dist'
         dependencies {

config/checkstyle/import-control.xml

@@ -60,6 +60,18 @@
       <allow pkg="com.mojang.datafixers" />
     </subpackage>
 
+    <subpackage name="fabric">
+      <allow pkg="net.minecraft"/>
+      <allow pkg="net.fabricmc"/>
+      <allow pkg="com.mojang.authlib"/>
+      <allow pkg="org.apache.logging.log4j"/>
+      <allow pkg="org.lwjgl"/>
+      <allow pkg="io.netty.buffer"/>
+      <allow pkg="org.spongepowered" />
+      <allow pkg="com.mojang.brigadier" />
+      <allow pkg="com.mojang.datafixers" />
+    </subpackage>
+
     <subpackage name="sponge">
       <allow pkg="net.minecraft"/>
       <allow pkg="com.google.inject" />

settings.gradle

@@ -2,7 +2,7 @@ rootProject.name = 'worldedit'
 
 include 'worldedit-libs'
 
-['bukkit', 'core', 'forge', 'sponge'].forEach {
+['bukkit', 'core', 'forge', 'sponge', 'fabric'].forEach {
     include "worldedit-libs:$it"
     include "worldedit-$it"
 }

worldedit-fabric/build.gradle

@@ -0,0 +1,105 @@
+import net.fabricmc.loom.task.RemapJarTask
+
+buildscript {
+    repositories {
+        jcenter()
+        maven {
+            name = 'Fabric'
+            url = 'https://maven.fabricmc.net/'
+        }
+        maven {
+            name = 'sponge'
+            url = 'https://repo.spongepowered.org/maven'
+        }
+    }
+
+    dependencies {
+        classpath 'net.fabricmc:fabric-loom:0.2.4-SNAPSHOT'
+        classpath 'org.spongepowered:mixin:0.7.11-SNAPSHOT'
+    }
+}
+
+apply plugin: 'eclipse'
+apply plugin: 'fabric-loom'
+
+def minecraftVersion = "1.14.2"
+def fabricVersion = "0.3.0+build.185"
+def yarnMappings = "1.14.2+build.7"
+def loaderVersion = "0.4.8+build.155"
+
+configurations.all { Configuration it ->
+    it.resolutionStrategy { ResolutionStrategy rs ->
+        rs.force("com.google.guava:guava:21.0")
+    }
+}
+
+dependencies {
+    compile project(':worldedit-core')
+    compile '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:${loaderVersion}"
+
+    modCompile "net.fabricmc.fabric-api:fabric-api:${fabricVersion}"
+
+    testCompile group: 'org.mockito', name: 'mockito-core', version: '1.9.0-rc1'
+}
+
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
+
+minecraft {
+}
+
+project.archivesBaseName = "${project.archivesBaseName}-mc${minecraftVersion}"
+
+processResources {
+    // this will ensure that this task is redone when the versions change.
+    inputs.property 'version', project.internalVersion
+
+    from(sourceSets.main.resources.srcDirs) {
+        include "fabric.mod.json"
+        expand "version": project.internalVersion
+    }
+
+    // copy everything else except the mod json
+    from(sourceSets.main.resources.srcDirs) {
+        exclude "fabric.mod.json"
+    }
+}
+
+jar {
+    manifest {
+        attributes("Class-Path": "truezip.jar WorldEdit/truezip.jar js.jar WorldEdit/js.jar",
+                   "WorldEdit-Version": version)
+    }
+}
+
+shadowJar {
+    classifier = 'dist-dev'
+    dependencies {
+        relocate "org.slf4j", "com.sk89q.worldedit.slf4j"
+        relocate "org.apache.logging.slf4j", "com.sk89q.worldedit.log4jbridge"
+
+        include(dependency('org.slf4j:slf4j-api'))
+        include(dependency("org.apache.logging.log4j:log4j-slf4j-impl"))
+    }
+}
+
+task deobfJar(type: Jar) {
+    from sourceSets.main.output
+    classifier = 'dev'
+}
+
+artifacts {
+    archives deobfJar
+}
+
+task shadowJarRemap(type: RemapJarTask) {
+    input shadowJar.archivePath
+    output new File(shadowJar.archivePath.getAbsolutePath().replaceFirst('-dev\\.jar$', ".jar"))
+}
+
+shadowJarRemap.dependsOn(shadowJar)
+build.dependsOn(shadowJarRemap)

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

@@ -0,0 +1,128 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+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;
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.mojang.brigadier.builder.LiteralArgumentBuilder;
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.context.StringRange;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import com.mojang.brigadier.suggestion.Suggestion;
+import com.mojang.brigadier.suggestion.Suggestions;
+import com.mojang.brigadier.suggestion.SuggestionsBuilder;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.event.platform.CommandSuggestionEvent;
+import com.sk89q.worldedit.extension.platform.Actor;
+import com.sk89q.worldedit.internal.util.Substring;
+import net.minecraft.entity.Entity;
+import net.minecraft.server.command.ServerCommandSource;
+import net.minecraft.server.network.ServerPlayerEntity;
+import org.enginehub.piston.inject.InjectedValueStore;
+import org.enginehub.piston.inject.Key;
+import org.enginehub.piston.inject.MapBackedValueStore;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Predicate;
+
+
+public final class CommandWrapper {
+
+    private CommandWrapper() {
+    }
+
+    public static void register(CommandDispatcher<ServerCommandSource> dispatcher, org.enginehub.piston.Command command) {
+        ImmutableList.Builder<String> aliases = ImmutableList.builder();
+        aliases.add(command.getName()).addAll(command.getAliases());
+
+        Command<ServerCommandSource> commandRunner =
+                ctx -> {
+                    WorldEdit.getInstance().getEventBus().post(new com.sk89q.worldedit.event.platform.CommandEvent(
+                            adaptPlayer(ctx.getSource().getPlayer()),
+                            ctx.getInput()
+                    ));
+                    return 0;
+                };
+
+        for (String alias : aliases.build()) {
+            LiteralArgumentBuilder<ServerCommandSource> base = literal(alias).executes(commandRunner)
+                    .then(argument("args", StringArgumentType.greedyString())
+                            .suggests(CommandWrapper::suggest)
+                            .executes(commandRunner));
+            if (command.getCondition() != org.enginehub.piston.Command.Condition.TRUE) {
+                base.requires(requirementsFor(command));
+            }
+            dispatcher.register(base);
+        }
+    }
+
+    private static Predicate<ServerCommandSource> requirementsFor(org.enginehub.piston.Command mapping) {
+        return ctx -> {
+            final Entity entity = ctx.getEntity();
+            if (!(entity instanceof ServerPlayerEntity)) {
+                return true;
+            }
+            final Actor actor = FabricAdapter.adaptPlayer(((ServerPlayerEntity) entity));
+            InjectedValueStore store = MapBackedValueStore.create();
+            store.injectValue(Key.of(Actor.class), context -> Optional.of(actor));
+            return mapping.getCondition().satisfied(store);
+        };
+    }
+
+    private static CompletableFuture<Suggestions> suggest(CommandContext<ServerCommandSource> context,
+            SuggestionsBuilder builder) throws CommandSyntaxException {
+        CommandSuggestionEvent event = new CommandSuggestionEvent(
+                FabricAdapter.adaptPlayer(context.getSource().getPlayer()),
+                builder.getInput()
+        );
+        WorldEdit.getInstance().getEventBus().post(event);
+        List<Substring> suggestions = event.getSuggestions();
+
+        ImmutableList.Builder<Suggestion> result = ImmutableList.builder();
+
+        for (Substring suggestion : suggestions) {
+            String suggestionText = suggestion.getSubstring();
+            // If at end, we are actually suggesting the next argument
+            // Ensure there is a space!
+            if (suggestion.getStart() == suggestion.getEnd()
+                    && suggestion.getEnd() == builder.getInput().length()
+                    && !builder.getInput().endsWith(" ")) {
+                suggestionText = " " + suggestionText;
+            }
+            result.add(new Suggestion(
+                    StringRange.between(suggestion.getStart(), suggestion.getEnd()),
+                    suggestionText
+            ));
+        }
+
+        return CompletableFuture.completedFuture(
+                Suggestions.create(builder.getInput(), result.build())
+        );
+    }
+
+}

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

@@ -0,0 +1,241 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.collect.ImmutableList;
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.jnbt.Tag;
+import com.sk89q.worldedit.blocks.BaseItemStack;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.math.Vector3;
+import com.sk89q.worldedit.registry.state.BooleanProperty;
+import com.sk89q.worldedit.registry.state.DirectionalProperty;
+import com.sk89q.worldedit.registry.state.EnumProperty;
+import com.sk89q.worldedit.registry.state.IntegerProperty;
+import com.sk89q.worldedit.registry.state.Property;
+import com.sk89q.worldedit.util.Direction;
+import com.sk89q.worldedit.world.World;
+import com.sk89q.worldedit.world.biome.BiomeType;
+import com.sk89q.worldedit.world.biome.BiomeTypes;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockType;
+import com.sk89q.worldedit.world.block.BlockTypes;
+import com.sk89q.worldedit.world.item.ItemType;
+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.network.ServerPlayerEntity;
+import net.minecraft.state.StateFactory;
+import net.minecraft.state.property.DirectionProperty;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.StringIdentifiable;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.util.registry.Registry;
+import net.minecraft.world.biome.Biome;
+
+import java.util.Comparator;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.stream.Collectors;
+
+public final class FabricAdapter {
+
+    private FabricAdapter() {
+    }
+
+    public static World adapt(net.minecraft.world.World world) {
+        return new FabricWorld(world);
+    }
+
+    public static Biome adapt(BiomeType biomeType) {
+        return Registry.BIOME.get(new Identifier(biomeType.getId()));
+    }
+
+    public static BiomeType adapt(Biome biome) {
+        return BiomeTypes.get(Registry.BIOME.getId(biome).toString());
+    }
+
+    public static Vector3 adapt(Vec3d vector) {
+        return Vector3.at(vector.x, vector.y, vector.z);
+    }
+
+    public static BlockVector3 adapt(BlockPos pos) {
+        return BlockVector3.at(pos.getX(), pos.getY(), pos.getZ());
+    }
+
+    public static Vec3d toVec3(BlockVector3 vector) {
+        return new Vec3d(vector.getBlockX(), vector.getBlockY(), vector.getBlockZ());
+    }
+
+    public static net.minecraft.util.math.Direction adapt(Direction face) {
+        switch (face) {
+            case NORTH: return net.minecraft.util.math.Direction.NORTH;
+            case SOUTH: return net.minecraft.util.math.Direction.SOUTH;
+            case WEST: return net.minecraft.util.math.Direction.WEST;
+            case EAST: return net.minecraft.util.math.Direction.EAST;
+            case DOWN: return net.minecraft.util.math.Direction.DOWN;
+            case UP:
+            default:
+                return net.minecraft.util.math.Direction.UP;
+        }
+    }
+
+    public static Direction adaptEnumFacing(net.minecraft.util.math.Direction face) {
+        switch (face) {
+            case NORTH: return Direction.NORTH;
+            case SOUTH: return Direction.SOUTH;
+            case WEST: return Direction.WEST;
+            case EAST: return Direction.EAST;
+            case DOWN: return Direction.DOWN;
+            case UP:
+            default:
+                return Direction.UP;
+        }
+    }
+
+    public static BlockPos toBlockPos(BlockVector3 vector) {
+        return new BlockPos(vector.getBlockX(), vector.getBlockY(), vector.getBlockZ());
+    }
+
+    public static Property<?> adaptProperty(net.minecraft.state.property.Property<?> property) {
+        if (property instanceof net.minecraft.state.property.BooleanProperty) {
+            return new BooleanProperty(property.getName(), ImmutableList.copyOf(((net.minecraft.state.property.BooleanProperty) property).getValues()));
+        }
+        if (property instanceof net.minecraft.state.property.IntProperty) {
+            return new IntegerProperty(property.getName(), ImmutableList.copyOf(((net.minecraft.state.property.IntProperty) property).getValues()));
+        }
+        if (property instanceof DirectionProperty) {
+            return new DirectionalProperty(property.getName(), ((DirectionProperty) property).getValues().stream()
+                    .map(FabricAdapter::adaptEnumFacing)
+                    .collect(Collectors.toList()));
+        }
+        if (property instanceof net.minecraft.state.property.EnumProperty) {
+            // Note: do not make x.asString a method reference.
+            // It will cause runtime bootstrap exceptions.
+            return new EnumProperty(property.getName(), ((net.minecraft.state.property.EnumProperty<?>) property).getValues().stream()
+                    .map(x -> x.asString())
+                    .collect(Collectors.toList()));
+        }
+        return new PropertyAdapter<>(property);
+    }
+
+    public static Map<Property<?>, Object> adaptProperties(BlockType block, Map<net.minecraft.state.property.Property<?>, Comparable<?>> mcProps) {
+        Map<Property<?>, Object> props = new TreeMap<>(Comparator.comparing(Property::getName));
+        for (Map.Entry<net.minecraft.state.property.Property<?>, Comparable<?>> prop : mcProps.entrySet()) {
+            Object value = prop.getValue();
+            if (prop.getKey() instanceof DirectionProperty) {
+                value = adaptEnumFacing((net.minecraft.util.math.Direction) value);
+            } else if (prop.getKey() instanceof net.minecraft.state.property.EnumProperty) {
+                value = ((StringIdentifiable) value).asString();
+            }
+            props.put(block.getProperty(prop.getKey().getName()), value);
+        }
+        return props;
+    }
+
+    private static net.minecraft.block.BlockState applyProperties(StateFactory<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());
+            Comparable value = (Comparable) state.getValue();
+            // we may need to adapt this value, depending on the source prop
+            if (property instanceof DirectionProperty) {
+                Direction dir = (Direction) value;
+                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(() -> {
+                    throw new IllegalStateException("Enum property " + property.getName() + " does not contain " + enumName);
+                });
+            }
+
+            newState = newState.with(property, value);
+        }
+        return newState;
+    }
+
+    public static net.minecraft.block.BlockState adapt(BlockState blockState) {
+        Block mcBlock = adapt(blockState.getBlockType());
+        net.minecraft.block.BlockState newState = mcBlock.getDefaultState();
+        Map<Property<?>, Object> states = blockState.getStates();
+        return applyProperties(mcBlock.getStateFactory(), newState, states);
+    }
+
+    public static BlockState adapt(net.minecraft.block.BlockState blockState) {
+        BlockType blockType = adapt(blockState.getBlock());
+        return blockType.getState(adaptProperties(blockType, blockState.getEntries()));
+    }
+
+    public static Block adapt(BlockType blockType) {
+        return Registry.BLOCK.get(new Identifier(blockType.getId()));
+    }
+
+    public static BlockType adapt(Block block) {
+        return BlockTypes.get(Registry.BLOCK.getId(block).toString());
+    }
+
+    public static Item adapt(ItemType itemType) {
+        return Registry.ITEM.get(new Identifier(itemType.getId()));
+    }
+
+    public static ItemType adapt(Item item) {
+        return ItemTypes.get(Registry.ITEM.getId(item).toString());
+    }
+
+    public static ItemStack adapt(BaseItemStack baseItemStack) {
+        net.minecraft.nbt.CompoundTag fabricCompound = null;
+        if (baseItemStack.getNbtData() != null) {
+            fabricCompound = NBTConverter.toNative(baseItemStack.getNbtData());
+        }
+        final ItemStack itemStack = new ItemStack(adapt(baseItemStack.getType()), baseItemStack.getAmount());
+        itemStack.setTag(fabricCompound);
+        return itemStack;
+    }
+
+    public static BaseItemStack adapt(ItemStack itemStack) {
+        CompoundTag tag = NBTConverter.fromNative(itemStack.toTag(new net.minecraft.nbt.CompoundTag()));
+        if (tag.getValue().isEmpty()) {
+            tag = null;
+        } else {
+            final Tag tagTag = tag.getValue().get("tag");
+            if (tagTag instanceof CompoundTag) {
+                tag = ((CompoundTag) tagTag);
+            } else {
+                tag = null;
+            }
+        }
+        return new BaseItemStack(adapt(itemStack.getItem()), tag, itemStack.getCount());
+    }
+
+    /**
+     * Get the WorldEdit proxy for the given player.
+     *
+     * @param player the player
+     * @return the WorldEdit player
+     */
+    public static FabricPlayer adaptPlayer(ServerPlayerEntity player) {
+        checkNotNull(player);
+        return new FabricPlayer(player);
+    }
+}

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

@@ -0,0 +1,58 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+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;
+
+/**
+ * Provides access to biome data in Fabric.
+ */
+class FabricBiomeRegistry implements BiomeRegistry {
+
+    @Override
+    public BiomeData getData(BiomeType biome) {
+        return new FabricBiomeData(FabricAdapter.adapt(biome));
+    }
+
+    /**
+     * Cached biome data information.
+     */
+    private static class FabricBiomeData implements BiomeData {
+        private final Biome biome;
+
+        /**
+         * Create a new instance.
+         *
+         * @param biome the base biome
+         */
+        private FabricBiomeData(Biome biome) {
+            this.biome = biome;
+        }
+
+        @Override
+        public String getName() {
+            return biome.getTextComponent().getString();
+        }
+    }
+
+}

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

@@ -0,0 +1,46 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.sk89q.worldedit.registry.Category;
+import com.sk89q.worldedit.world.block.BlockType;
+import com.sk89q.worldedit.world.registry.BlockCategoryRegistry;
+import net.minecraft.tag.BlockTags;
+import net.minecraft.tag.Tag;
+import net.minecraft.util.Identifier;
+
+import java.util.Collections;
+import java.util.Optional;
+import java.util.Set;
+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)))
+                .map(Tag::values).orElse(Collections.emptySet())
+                .stream().map(FabricAdapter::adapt).collect(Collectors.toSet());
+    }
+
+    @Override
+    public Set<BlockType> getAll(Category<BlockType> category) {
+        return getCategorisedByName(category.getId());
+    }
+}

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

@@ -0,0 +1,93 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.sk89q.worldedit.world.registry.BlockMaterial;
+import com.sk89q.worldedit.world.registry.PassthroughBlockMaterial;
+import net.minecraft.block.Material;
+import net.minecraft.block.piston.PistonBehavior;
+
+import javax.annotation.Nullable;
+
+/**
+ * Fabric block material that pulls as much info as possible from the Minecraft
+ * Material, and passes the rest to another implementation, typically the
+ * bundled block info.
+ */
+public class FabricBlockMaterial extends PassthroughBlockMaterial {
+
+    private final Material delegate;
+
+    public FabricBlockMaterial(Material delegate, @Nullable BlockMaterial secondary) {
+        super(secondary);
+        this.delegate = delegate;
+    }
+
+    @Override
+    public boolean isAir() {
+        return delegate == Material.AIR || super.isAir();
+    }
+
+    @Override
+    public boolean isOpaque() {
+        return delegate.blocksLight();
+    }
+
+    @Override
+    public boolean isLiquid() {
+        return delegate.isLiquid();
+    }
+
+    @Override
+    public boolean isSolid() {
+        return delegate.isSolid();
+    }
+
+    @Override
+    public boolean isFragileWhenPushed() {
+        return delegate.getPistonBehavior() == PistonBehavior.DESTROY;
+    }
+
+    @Override
+    public boolean isUnpushable() {
+        return delegate.getPistonBehavior() == PistonBehavior.BLOCK;
+    }
+
+    @Override
+    public boolean isMovementBlocker() {
+        return delegate.blocksMovement();
+    }
+
+    @Override
+    public boolean isBurnable() {
+        return delegate.isBurnable();
+    }
+
+    @Override
+    public boolean isToolRequired() {
+        return !delegate.canBreakByHand();
+    }
+
+    @Override
+    public boolean isReplacedDuringPlacement() {
+        return delegate.isReplaceable();
+    }
+
+}

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

@@ -0,0 +1,80 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.sk89q.worldedit.registry.state.Property;
+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;
+import java.util.Map;
+import java.util.OptionalInt;
+import java.util.TreeMap;
+
+public class FabricBlockRegistry extends BundledBlockRegistry {
+
+    private Map<Material, FabricBlockMaterial> materialMap = new HashMap<>();
+
+    @Nullable
+    @Override
+    public String getName(BlockType blockType) {
+        Block block = FabricAdapter.adapt(blockType);
+        if (FabricLoader.getInstance().getEnvironmentType() == EnvType.CLIENT) {
+            return block.getTextComponent().getFormattedText();
+        } else {
+            return super.getName(blockType);
+        }
+    }
+
+    @Override
+    public BlockMaterial getMaterial(BlockType blockType) {
+        Block block = FabricAdapter.adapt(blockType);
+        return materialMap.computeIfAbsent(block.getDefaultState().getMaterial(),
+                m -> new FabricBlockMaterial(m, super.getMaterial(blockType)));
+    }
+
+    @Override
+    public Map<String, ? extends Property<?>> getProperties(BlockType blockType) {
+        Block block = FabricAdapter.adapt(blockType);
+        Map<String, Property<?>> map = new TreeMap<>();
+        Collection<net.minecraft.state.property.Property<?>> propertyKeys = block
+                .getDefaultState()
+                .getProperties();
+        for (net.minecraft.state.property.Property<?> key : propertyKeys) {
+            map.put(key.getName(), FabricAdapter.adaptProperty(key));
+        }
+        return map;
+    }
+
+    @Override
+    public OptionalInt getInternalBlockStateId(BlockState state) {
+        net.minecraft.block.BlockState equivalent = FabricAdapter.adapt(state);
+        return OptionalInt.of(Block.getRawIdFromState(equivalent));
+    }
+}

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

@@ -0,0 +1,45 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.sk89q.worldedit.util.PropertiesConfiguration;
+
+import java.io.File;
+
+public class FabricConfiguration extends PropertiesConfiguration {
+
+    public boolean creativeEnable = false;
+    public boolean cheatMode = false;
+
+    public FabricConfiguration(FabricWorldEdit mod) {
+        super(new File(mod.getWorkingDir(), "worldedit.properties"));
+    }
+
+    @Override
+    protected void loadExtra() {
+        creativeEnable = getBool("use-in-creative", false);
+        cheatMode = getBool("cheat-mode", false);
+    }
+
+    @Override
+    public File getWorkingDirectory() {
+        return FabricWorldEdit.inst.getWorkingDir();
+    }
+}

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

@@ -0,0 +1,116 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+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;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.math.Vector3;
+import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.world.NullWorld;
+import com.sk89q.worldedit.world.entity.EntityTypes;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.registry.Registry;
+
+import java.lang.ref.WeakReference;
+
+import javax.annotation.Nullable;
+
+class FabricEntity implements Entity {
+
+    private final WeakReference<net.minecraft.entity.Entity> entityRef;
+
+    FabricEntity(net.minecraft.entity.Entity entity) {
+        checkNotNull(entity);
+        this.entityRef = new WeakReference<>(entity);
+    }
+
+    @Override
+    public BaseEntity getState() {
+        net.minecraft.entity.Entity entity = entityRef.get();
+        if (entity != null) {
+            Identifier id = Registry.ENTITY_TYPE.getId(entity.getType());
+            CompoundTag tag = new CompoundTag();
+            entity.toTag(tag);
+            return new BaseEntity(EntityTypes.get(id.toString()), NBTConverter.fromNative(tag));
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public Location getLocation() {
+        net.minecraft.entity.Entity entity = entityRef.get();
+        if (entity != null) {
+            Vector3 position = Vector3.at(entity.x, entity.y, entity.z);
+            float yaw = entity.yaw;
+            float pitch = entity.pitch;
+
+            return new Location(FabricAdapter.adapt(entity.world), position, yaw, pitch);
+        } else {
+            return new Location(NullWorld.getInstance());
+        }
+    }
+
+    @Override
+    public boolean setLocation(Location location) {
+        // TODO unused atm
+        return false;
+    }
+
+    @Override
+    public Extent getExtent() {
+        net.minecraft.entity.Entity entity = entityRef.get();
+        if (entity != null) {
+            return FabricAdapter.adapt(entity.world);
+        } else {
+            return NullWorld.getInstance();
+        }
+    }
+
+    @Override
+    public boolean remove() {
+        net.minecraft.entity.Entity entity = entityRef.get();
+        if (entity != null) {
+            entity.remove();
+        }
+        return true;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Nullable
+    @Override
+    public <T> T getFacet(Class<? extends T> cls) {
+        net.minecraft.entity.Entity entity = entityRef.get();
+        if (entity != null) {
+            if (EntityProperties.class.isAssignableFrom(cls)) {
+                return (T) new FabricEntityProperties(entity);
+            } else {
+                return null;
+            }
+        } else {
+            return null;
+        }
+    }
+}

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

@@ -0,0 +1,151 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+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;
+import net.minecraft.entity.ItemEntity;
+import net.minecraft.entity.Npc;
+import net.minecraft.entity.TntEntity;
+import net.minecraft.entity.boss.dragon.EnderDragonEntity;
+import net.minecraft.entity.decoration.ArmorStandEntity;
+import net.minecraft.entity.decoration.ItemFrameEntity;
+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.player.PlayerEntity;
+import net.minecraft.entity.projectile.Projectile;
+import net.minecraft.entity.vehicle.AbstractMinecartEntity;
+import net.minecraft.entity.vehicle.BoatEntity;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.village.Trader;
+
+public class FabricEntityProperties implements EntityProperties {
+
+    private final Entity entity;
+
+    public FabricEntityProperties(Entity entity) {
+        checkNotNull(entity);
+        this.entity = entity;
+    }
+
+    @Override
+    public boolean isPlayerDerived() {
+        return entity instanceof PlayerEntity;
+    }
+
+    @Override
+    public boolean isProjectile() {
+        return entity instanceof EnderEyeEntity || entity instanceof Projectile;
+    }
+
+    @Override
+    public boolean isItem() {
+        return entity instanceof ItemEntity;
+    }
+
+    @Override
+    public boolean isFallingBlock() {
+        return entity instanceof FallingBlockEntity;
+    }
+
+    @Override
+    public boolean isPainting() {
+        return entity instanceof PaintingEntity;
+    }
+
+    @Override
+    public boolean isItemFrame() {
+        return entity instanceof ItemFrameEntity;
+    }
+
+    @Override
+    public boolean isBoat() {
+        return entity instanceof BoatEntity;
+    }
+
+    @Override
+    public boolean isMinecart() {
+        return entity instanceof AbstractMinecartEntity;
+    }
+
+    @Override
+    public boolean isTNT() {
+        return entity instanceof TntEntity;
+    }
+
+    @Override
+    public boolean isExperienceOrb() {
+        return entity instanceof ExperienceOrbEntity;
+    }
+
+    @Override
+    public boolean isLiving() {
+        return entity instanceof MobEntity;
+    }
+
+    @Override
+    public boolean isAnimal() {
+        return entity instanceof AnimalEntity;
+    }
+
+    @Override
+    public boolean isAmbient() {
+        return entity instanceof AmbientEntity;
+    }
+
+    @Override
+    public boolean isNPC() {
+        return entity instanceof Npc || entity instanceof Trader;
+    }
+
+    @Override
+    public boolean isGolem() {
+        return entity instanceof GolemEntity;
+    }
+
+    @Override
+    public boolean isTamed() {
+        return entity instanceof TameableEntity && ((TameableEntity) entity).isTamed();
+    }
+
+    @Override
+    public boolean isTagged() {
+        return entity.hasCustomName();
+    }
+
+    @Override
+    public boolean isArmorStand() {
+        return entity instanceof ArmorStandEntity;
+    }
+
+    @Override
+    public boolean isPasteable() {
+        return !(entity instanceof ServerPlayerEntity || entity instanceof EnderDragonEntity);
+    }
+}

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

@@ -0,0 +1,46 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.sk89q.worldedit.registry.Category;
+import com.sk89q.worldedit.world.item.ItemType;
+import com.sk89q.worldedit.world.registry.ItemCategoryRegistry;
+import net.minecraft.tag.ItemTags;
+import net.minecraft.tag.Tag;
+import net.minecraft.util.Identifier;
+
+import java.util.Collections;
+import java.util.Optional;
+import java.util.Set;
+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)))
+                .map(Tag::values).orElse(Collections.emptySet())
+                .stream().map(FabricAdapter::adapt).collect(Collectors.toSet());
+    }
+
+    @Override
+    public Set<ItemType> getAll(Category<ItemType> category) {
+        return getCategorisedByName(category.getId());
+    }
+}

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

@@ -0,0 +1,42 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+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) {
+        if (FabricLoader.getInstance().getEnvironmentType() == EnvType.CLIENT) {
+            final Item item = FabricAdapter.adapt(itemType);
+            return I18n.translate(item.getTranslationKey());
+        }
+        return super.getName(itemType);
+    }
+}

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

@@ -0,0 +1,50 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.world.GameMode;
+
+public interface FabricPermissionsProvider {
+
+    boolean hasPermission(ServerPlayerEntity player, String permission);
+
+    void registerPermission(String permission);
+
+    class VanillaPermissionsProvider implements FabricPermissionsProvider {
+
+        private FabricPlatform platform;
+
+        public VanillaPermissionsProvider(FabricPlatform platform) {
+            this.platform = platform;
+        }
+
+        @Override
+        public boolean hasPermission(ServerPlayerEntity player, String permission) {
+            FabricConfiguration configuration = platform.getConfiguration();
+            return configuration.cheatMode ||
+                    player.server.getPlayerManager().isOperator(player.getGameProfile()) ||
+                    (configuration.creativeEnable && player.interactionManager.getGameMode() == GameMode.CREATIVE);
+        }
+
+        @Override
+        public void registerPermission(String permission) {}
+    }
+}

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

@@ -0,0 +1,202 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.sk89q.worldedit.command.util.PermissionCondition;
+import com.sk89q.worldedit.entity.Player;
+import com.sk89q.worldedit.extension.platform.AbstractPlatform;
+import com.sk89q.worldedit.extension.platform.Actor;
+import com.sk89q.worldedit.extension.platform.Capability;
+import com.sk89q.worldedit.extension.platform.MultiUserPlatform;
+import com.sk89q.worldedit.extension.platform.Preference;
+import com.sk89q.worldedit.world.DataFixer;
+import com.sk89q.worldedit.world.World;
+import com.sk89q.worldedit.world.registry.Registries;
+import net.minecraft.SharedConstants;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.PlayerManager;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.registry.Registry;
+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;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static java.util.stream.Collectors.toList;
+
+class FabricPlatform extends AbstractPlatform implements MultiUserPlatform {
+
+    private final FabricWorldEdit mod;
+    private final MinecraftServer server;
+    private final FabricDataFixer dataFixer;
+    private boolean hookingEvents = false;
+
+    FabricPlatform(FabricWorldEdit mod, MinecraftServer server) {
+        this.mod = mod;
+        this.server = server;
+        this.dataFixer = new FabricDataFixer(getDataVersion());
+    }
+
+    boolean isHookingEvents() {
+        return hookingEvents;
+    }
+
+    @Override
+    public Registries getRegistries() {
+        return FabricRegistries.getInstance();
+    }
+
+    @Override
+    public int getDataVersion() {
+        return SharedConstants.getGameVersion().getWorldVersion();
+    }
+
+    @Override
+    public DataFixer getDataFixer() {
+        return dataFixer;
+    }
+
+    @Override
+    public boolean isValidMobType(String type) {
+        return Registry.ENTITY_TYPE.containsId(new Identifier(type));
+    }
+
+    @Override
+    public void reload() {
+        getConfiguration().load();
+    }
+
+    @Override
+    public int schedule(long delay, long period, Runnable task) {
+        return -1;
+    }
+
+    @Override
+    public List<? extends World> getWorlds() {
+        Iterable<ServerWorld> worlds = server.getWorlds();
+        List<World> ret = new ArrayList<>();
+        for (ServerWorld world : worlds) {
+            ret.add(new FabricWorld(world));
+        }
+        return ret;
+    }
+
+    @Nullable
+    @Override
+    public Player matchPlayer(Player player) {
+        if (player instanceof FabricPlayer) {
+            return player;
+        } else {
+            ServerPlayerEntity entity = server.getPlayerManager().getPlayer(player.getName());
+            return entity != null ? new FabricPlayer(entity) : null;
+        }
+    }
+
+    @Nullable
+    @Override
+    public World matchWorld(World world) {
+        if (world instanceof FabricWorld) {
+            return world;
+        } else {
+            for (ServerWorld ws : server.getWorlds()) {
+                if (ws.getLevelProperties().getLevelName().equals(world.getName())) {
+                    return new FabricWorld(ws);
+                }
+            }
+
+            return null;
+        }
+    }
+
+    @Override
+    public void registerCommands(CommandManager manager) {
+        if (server == null) return;
+        net.minecraft.server.command.CommandManager mcMan = server.getCommandManager();
+
+        for (Command command : manager.getAllCommands().collect(toList())) {
+            CommandWrapper.register(mcMan.getDispatcher(), command);
+            Set<String> perms = command.getCondition().as(PermissionCondition.class)
+                .map(PermissionCondition::getPermissions)
+                .orElseGet(Collections::emptySet);
+            if (!perms.isEmpty()) {
+                perms.forEach(FabricWorldEdit.inst.getPermissionsProvider()::registerPermission);
+            }
+        }
+    }
+
+    @Override
+    public void registerGameHooks() {
+        // We registered the events already anyway, so we just 'turn them on'
+        hookingEvents = true;
+    }
+
+    @Override
+    public FabricConfiguration getConfiguration() {
+        return mod.getConfig();
+    }
+
+    @Override
+    public String getVersion() {
+        return mod.getInternalVersion();
+    }
+
+    @Override
+    public String getPlatformName() {
+        return "Fabric-Official";
+    }
+
+    @Override
+    public String getPlatformVersion() {
+        return mod.getInternalVersion();
+    }
+
+    @Override
+    public Map<Capability, Preference> getCapabilities() {
+        Map<Capability, Preference> capabilities = new EnumMap<>(Capability.class);
+        capabilities.put(Capability.CONFIGURATION, Preference.PREFER_OTHERS);
+        capabilities.put(Capability.WORLDEDIT_CUI, Preference.NORMAL);
+        capabilities.put(Capability.GAME_HOOKS, Preference.NORMAL);
+        capabilities.put(Capability.PERMISSIONS, Preference.NORMAL);
+        capabilities.put(Capability.USER_COMMANDS, Preference.NORMAL);
+        capabilities.put(Capability.WORLD_EDITING, Preference.PREFERRED);
+        return capabilities;
+    }
+
+    @Override
+    public Collection<Actor> getConnectedUsers() {
+        List<Actor> users = new ArrayList<>();
+        PlayerManager scm = server.getPlayerManager();
+        for (ServerPlayerEntity entity : scm.getPlayerList()) {
+            if (entity != null) {
+                users.add(new FabricPlayer(entity));
+            }
+        }
+        return users;
+    }
+}

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

@@ -0,0 +1,267 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.util.StringUtil;
+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.net.handler.WECUIPacketHandler;
+import com.sk89q.worldedit.internal.cui.CUIEvent;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.math.Vector3;
+import com.sk89q.worldedit.session.SessionKey;
+import com.sk89q.worldedit.util.HandSide;
+import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.util.formatting.text.Component;
+import com.sk89q.worldedit.util.formatting.text.serializer.gson.GsonComponentSerializer;
+import com.sk89q.worldedit.world.World;
+import com.sk89q.worldedit.world.block.BaseBlock;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+import com.sk89q.worldedit.world.block.BlockTypes;
+import io.netty.buffer.Unpooled;
+import net.minecraft.ChatFormat;
+import net.minecraft.block.Block;
+import net.minecraft.client.network.packet.BlockEntityUpdateS2CPacket;
+import net.minecraft.client.network.packet.BlockUpdateS2CPacket;
+import net.minecraft.client.network.packet.CustomPayloadS2CPacket;
+import net.minecraft.item.ItemStack;
+import net.minecraft.network.chat.TextComponent;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.util.Hand;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.PacketByteBuf;
+import net.minecraft.util.math.BlockPos;
+
+import java.io.IOException;
+import java.util.UUID;
+
+import javax.annotation.Nullable;
+
+public class FabricPlayer extends AbstractPlayerActor {
+
+    // see ClientPlayNetHandler: search for "invalid update packet", lots of hardcoded consts
+    private static final int STRUCTURE_BLOCK_PACKET_ID = 7;
+    private final ServerPlayerEntity player;
+
+    protected FabricPlayer(ServerPlayerEntity player) {
+        this.player = player;
+        ThreadSafeCache.getInstance().getOnlineIds().add(getUniqueId());
+    }
+
+    @Override
+    public UUID getUniqueId() {
+        return player.getUuid();
+    }
+
+    @Override
+    public BaseItemStack getItemInHand(HandSide handSide) {
+        ItemStack is = this.player.getStackInHand(handSide == HandSide.MAIN_HAND ? Hand.MAIN_HAND : Hand.OFF_HAND);
+        return FabricAdapter.adapt(is);
+    }
+
+    @Override
+    public String getName() {
+        return this.player.getName().getFormattedText();
+    }
+
+    @Override
+    public BaseEntity getState() {
+        throw new UnsupportedOperationException("Cannot create a state from this object");
+    }
+
+    @Override
+    public Location getLocation() {
+        Vector3 position = Vector3.at(this.player.x, this.player.y, this.player.z);
+        return new Location(
+                FabricWorldEdit.inst.getWorld(this.player.world),
+                position,
+                this.player.yaw,
+                this.player.pitch);
+    }
+
+    @Override
+    public boolean setLocation(Location location) {
+        // TODO
+        return false;
+    }
+
+    @Override
+    public com.sk89q.worldedit.world.World getWorld() {
+        return FabricWorldEdit.inst.getWorld(this.player.world);
+    }
+
+    @Override
+    public void giveItem(BaseItemStack itemStack) {
+        this.player.inventory.insertStack(FabricAdapter.adapt(itemStack));
+    }
+
+    @Override
+    public void dispatchCUIEvent(CUIEvent event) {
+        String[] params = event.getParameters();
+        String send = event.getTypeId();
+        if (params.length > 0) {
+            send = send + "|" + StringUtil.joinString(params, "|");
+        }
+        PacketByteBuf buffer = new PacketByteBuf(Unpooled.copiedBuffer(send.getBytes(WECUIPacketHandler.UTF_8_CHARSET)));
+        CustomPayloadS2CPacket packet = new CustomPayloadS2CPacket(new Identifier(FabricWorldEdit.MOD_ID, FabricWorldEdit.CUI_PLUGIN_CHANNEL), buffer);
+        this.player.networkHandler.sendPacket(packet);
+    }
+
+    @Override
+    public void printRaw(String msg) {
+        for (String part : msg.split("\n")) {
+            this.player.sendMessage(new TextComponent(part));
+        }
+    }
+
+    @Override
+    public void printDebug(String msg) {
+        sendColorized(msg, ChatFormat.GRAY);
+    }
+
+    @Override
+    public void print(String msg) {
+        sendColorized(msg, ChatFormat.LIGHT_PURPLE);
+    }
+
+    @Override
+    public void printError(String msg) {
+        sendColorized(msg, ChatFormat.RED);
+    }
+
+    @Override
+    public void print(Component component) {
+        this.player.sendMessage(net.minecraft.network.chat.Component.Serializer.fromJsonString(GsonComponentSerializer.INSTANCE.serialize(component)));
+    }
+
+    private void sendColorized(String msg, ChatFormat formatting) {
+        for (String part : msg.split("\n")) {
+            TextComponent component = new TextComponent(part);
+            component.getStyle().setColor(formatting);
+            this.player.sendMessage(component);
+        }
+    }
+
+    @Override
+    public void setPosition(Vector3 pos, float pitch, float yaw) {
+        this.player.networkHandler.requestTeleport(pos.getX(), pos.getY(), pos.getZ(), yaw, pitch);
+    }
+
+    @Override
+    public String[] getGroups() {
+        return new String[]{}; // WorldEditMod.inst.getPermissionsResolver().getGroups(this.player.username);
+    }
+
+    @Override
+    public BlockBag getInventoryBlockBag() {
+        return null;
+    }
+
+    @Override
+    public boolean hasPermission(String perm) {
+        return FabricWorldEdit.inst.getPermissionsProvider().hasPermission(player, perm);
+    }
+
+    @Nullable
+    @Override
+    public <T> T getFacet(Class<? extends T> cls) {
+        return null;
+    }
+
+    @Override
+    public <B extends BlockStateHolder<B>> void sendFakeBlock(BlockVector3 pos, B block) {
+        World world = getWorld();
+        if (!(world instanceof FabricWorld)) {
+            return;
+        }
+        BlockPos loc = FabricAdapter.toBlockPos(pos);
+        if (block == null) {
+            final BlockUpdateS2CPacket packetOut = new BlockUpdateS2CPacket(((FabricWorld) world).getWorld(), loc);
+            player.networkHandler.sendPacket(packetOut);
+        } else {
+            final BlockUpdateS2CPacket packetOut = new BlockUpdateS2CPacket();
+            PacketByteBuf buf = new PacketByteBuf(Unpooled.buffer());
+            buf.writeBlockPos(loc);
+            buf.writeVarInt(Block.getRawIdFromState(FabricAdapter.adapt(block.toImmutableState())));
+            try {
+                packetOut.read(buf);
+            } catch (IOException e) {
+                return;
+            }
+            player.networkHandler.sendPacket(packetOut);
+            if (block instanceof BaseBlock && block.getBlockType().equals(BlockTypes.STRUCTURE_BLOCK)) {
+                final BaseBlock baseBlock = (BaseBlock) block;
+                final CompoundTag nbtData = baseBlock.getNbtData();
+                if (nbtData != null) {
+                    player.networkHandler.sendPacket(new BlockEntityUpdateS2CPacket(
+                            new BlockPos(pos.getBlockX(), pos.getBlockY(), pos.getBlockZ()),
+                            STRUCTURE_BLOCK_PACKET_ID,
+                            NBTConverter.toNative(nbtData))
+                    );
+                }
+            }
+        }
+    }
+
+    @Override
+    public SessionKey getSessionKey() {
+        return new SessionKeyImpl(player.getUuid(), player.getName().getString());
+    }
+
+    private static class SessionKeyImpl implements SessionKey {
+        // If not static, this will leak a reference
+
+        private final UUID uuid;
+        private final String name;
+
+        private SessionKeyImpl(UUID uuid, String name) {
+            this.uuid = uuid;
+            this.name = name;
+        }
+
+        @Override
+        public UUID getUniqueId() {
+            return uuid;
+        }
+
+        @Nullable
+        @Override
+        public String getName() {
+            return name;
+        }
+
+        @Override
+        public boolean isActive() {
+            // We can't directly check if the player is online because
+            // the list of players is not thread safe
+            return ThreadSafeCache.getInstance().getOnlineIds().contains(uuid);
+        }
+
+        @Override
+        public boolean isPersistent() {
+            return true;
+        }
+
+    }
+
+}

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

@@ -0,0 +1,75 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
+import com.sk89q.worldedit.world.registry.BlockCategoryRegistry;
+import com.sk89q.worldedit.world.registry.BlockRegistry;
+import com.sk89q.worldedit.world.registry.BundledRegistries;
+import com.sk89q.worldedit.world.registry.ItemCategoryRegistry;
+import com.sk89q.worldedit.world.registry.ItemRegistry;
+
+/**
+ * World data for the Fabric platform.
+ */
+class FabricRegistries extends BundledRegistries {
+
+    private static final FabricRegistries INSTANCE = new FabricRegistries();
+    private final BlockRegistry blockRegistry = new FabricBlockRegistry();
+    private final BiomeRegistry biomeRegistry = new FabricBiomeRegistry();
+    private final ItemRegistry itemRegistry = new FabricItemRegistry();
+    private final BlockCategoryRegistry blockCategoryRegistry = new FabricBlockCategoryRegistry();
+    private final ItemCategoryRegistry itemCategoryRegistry = new FabricItemCategoryRegistry();
+
+    @Override
+    public BlockRegistry getBlockRegistry() {
+        return blockRegistry;
+    }
+
+    @Override
+    public BiomeRegistry getBiomeRegistry() {
+        return biomeRegistry;
+    }
+
+    @Override
+    public ItemRegistry getItemRegistry() {
+        return itemRegistry;
+    }
+
+    @Override
+    public BlockCategoryRegistry getBlockCategoryRegistry() {
+        return blockCategoryRegistry;
+    }
+
+    @Override
+    public ItemCategoryRegistry getItemCategoryRegistry() {
+        return itemCategoryRegistry;
+    }
+
+    /**
+     * Get a static instance.
+     *
+     * @return an instance
+     */
+    public static FabricRegistries getInstance() {
+        return INSTANCE;
+    }
+
+}

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

@@ -0,0 +1,597 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
+import com.google.common.io.Files;
+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.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.TreeGenerator.TreeType;
+import com.sk89q.worldedit.world.AbstractWorld;
+import com.sk89q.worldedit.world.biome.BiomeType;
+import com.sk89q.worldedit.world.block.BaseBlock;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+import com.sk89q.worldedit.world.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.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.hit.BlockHitResult;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.ChunkPos;
+import net.minecraft.world.World;
+import net.minecraft.world.WorldSaveHandler;
+import net.minecraft.world.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.gen.feature.DarkOakTreeFeature;
+import net.minecraft.world.gen.feature.DefaultFeatureConfig;
+import net.minecraft.world.gen.feature.Feature;
+import net.minecraft.world.gen.feature.FeatureConfig;
+import net.minecraft.world.gen.feature.HugeBrownMushroomFeature;
+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.Path;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.OptionalInt;
+import java.util.Random;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.stream.Collectors;
+
+import javax.annotation.Nullable;
+
+/**
+ * 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 final net.minecraft.block.BlockState JUNGLE_LEAF = Blocks.JUNGLE_LEAVES.getDefaultState().with(LeavesBlock.PERSISTENT, Boolean.TRUE);
+    private static final net.minecraft.block.BlockState JUNGLE_SHRUB = Blocks.OAK_LEAVES.getDefaultState().with(LeavesBlock.PERSISTENT, Boolean.TRUE);
+
+    private final WeakReference<World> worldRef;
+
+    /**
+     * Construct a new world.
+     *
+     * @param world the world
+     */
+    FabricWorld(World world) {
+        checkNotNull(world);
+        this.worldRef = new WeakReference<>(world);
+    }
+
+    /**
+     * 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.
+     *
+     * @return the world
+     * @throws RuntimeException thrown if a reference to the world was lost (i.e. world was unloaded)
+     */
+    public World getWorld() {
+        World world = worldRef.get();
+        if (world != null) {
+            return world;
+        } else {
+            throw new RuntimeException("The reference to the world was lost (i.e. the world may have been unloaded)");
+        }
+    }
+
+    @Override
+    public String getName() {
+        return getWorld().getLevelProperties().getLevelName();
+    }
+
+    @Override
+    public Path getStoragePath() {
+        final World world = getWorld();
+        if (world instanceof ServerWorld) {
+            return ((ServerWorld) world).getSaveHandler().getWorldDir().toPath();
+        }
+        return null;
+    }
+
+    @Override
+    public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 position, B block, boolean notifyAndLight) throws WorldEditException {
+        checkNotNull(position);
+        checkNotNull(block);
+
+        World world = getWorldChecked();
+        int x = position.getBlockX();
+        int y = position.getBlockY();
+        int z = position.getBlockZ();
+
+        // First set the block
+        Chunk chunk = world.getChunk(x >> 4, z >> 4);
+        BlockPos pos = new BlockPos(x, y, z);
+        net.minecraft.block.BlockState old = chunk.getBlockState(pos);
+        OptionalInt stateId = BlockStateIdAccess.getBlockStateId(block.toImmutableState());
+        net.minecraft.block.BlockState newState = stateId.isPresent() ? Block.getStateFromRawId(stateId.getAsInt()) : FabricAdapter.adapt(block.toImmutableState());
+        net.minecraft.block.BlockState successState = chunk.setBlockState(pos, newState, false);
+        boolean successful = successState != null;
+
+        // Create the TileEntity
+        if (successful || old == newState) {
+            if (block instanceof BaseBlock) {
+                CompoundTag tag = ((BaseBlock) block).getNbtData();
+                if (tag != null) {
+                    net.minecraft.nbt.CompoundTag nativeTag = NBTConverter.toNative(tag);
+                    nativeTag.putString("id", ((BaseBlock) block).getNbtId());
+                    TileEntityUtils.setTileEntity(world, position, nativeTag);
+                    successful = true; // update if TE changed as well
+                }
+            }
+        }
+
+        if (successful && notifyAndLight) {
+            world.getChunkManager().getLightingProvider().enqueueLightUpdate(pos);
+            world.updateListeners(pos, old, newState, UPDATE | NOTIFY);
+        }
+
+        return successful;
+    }
+
+    @Override
+    public boolean notifyAndLightBlock(BlockVector3 position, BlockState previousType) throws WorldEditException {
+        BlockPos pos = new BlockPos(position.getX(), position.getY(), position.getZ());
+        getWorld().updateListeners(pos, FabricAdapter.adapt(previousType), getWorld().getBlockState(pos), 1 | 2);
+        return true;
+    }
+
+    @Override
+    public int getBlockLightLevel(BlockVector3 position) {
+        checkNotNull(position);
+        return getWorld().getLightLevel(FabricAdapter.toBlockPos(position));
+    }
+
+    @Override
+    public boolean clearContainerBlockContents(BlockVector3 position) {
+        checkNotNull(position);
+        BlockEntity tile = getWorld().getBlockEntity(FabricAdapter.toBlockPos(position));
+        if ((tile instanceof Clearable)) {
+            ((Clearable) tile).clear();
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public BiomeType getBiome(BlockVector2 position) {
+        checkNotNull(position);
+        return FabricAdapter.adapt(getWorld().getBiome(new BlockPos(position.getBlockX(), 0, position.getBlockZ())));
+    }
+
+    @Override
+    public boolean setBiome(BlockVector2 position, BiomeType biome) {
+        checkNotNull(position);
+        checkNotNull(biome);
+
+        Chunk chunk = getWorld().getChunk(position.getBlockX() >> 4, position.getBlockZ() >> 4, ChunkStatus.FULL, false);
+        if (chunk == null) {
+            return false;
+        }
+        chunk.getBiomeArray()[((position.getBlockZ() & 0xF) << 4 | position.getBlockX() & 0xF)] = FabricAdapter.adapt(biome);
+        return true;
+    }
+
+    private static final LoadingCache<ServerWorld, WorldEditFakePlayer> fakePlayers
+            = CacheBuilder.newBuilder().weakKeys().softValues().build(CacheLoader.from(WorldEditFakePlayer::new));
+
+    @Override
+    public boolean useItem(BlockVector3 position, BaseItem item, Direction face) {
+        ItemStack stack = FabricAdapter.adapt(new BaseItemStack(item.getType(), item.getNbtData(), 1));
+        ServerWorld world = (ServerWorld) getWorld();
+        final WorldEditFakePlayer fakePlayer;
+        try {
+            fakePlayer = fakePlayers.get(world);
+        } catch (ExecutionException ignored) {
+            return false;
+        }
+        fakePlayer.setStackInHand(Hand.MAIN_HAND, stack);
+        fakePlayer.setPositionAndAngles(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),
+                FabricAdapter.adapt(face), blockPos, false);
+        ItemUsageContext itemUseContext = new ItemUsageContext(fakePlayer, Hand.MAIN_HAND, rayTraceResult);
+        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 = ActionResult.SUCCESS;
+            } else {
+                used = stack.getItem().use(world, fakePlayer, Hand.MAIN_HAND).getResult();
+            }
+        }
+        return used == ActionResult.SUCCESS;
+    }
+
+    @Override
+    public void dropItem(Vector3 position, BaseItemStack item) {
+        checkNotNull(position);
+        checkNotNull(item);
+
+        if (item.getType() == ItemTypes.AIR) {
+            return;
+        }
+
+        ItemEntity entity = new ItemEntity(getWorld(), position.getX(), position.getY(), position.getZ(), FabricAdapter.adapt(item));
+        entity.setPickupDelay(10);
+        getWorld().spawnEntity(entity);
+    }
+
+    @Override
+    public void simulateBlockMine(BlockVector3 position) {
+        BlockPos pos = FabricAdapter.toBlockPos(position);
+        getWorld().breakBlock(pos, true);
+    }
+
+    @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();
+        // register this just in case something goes wrong
+        // normally it should be deleted at the end of this method
+        saveFolder.deleteOnExit();
+        try {
+            ServerWorld originalWorld = (ServerWorld) getWorld();
+
+            MinecraftServer server = originalWorld.getServer();
+            WorldSaveHandler saveHandler = new WorldSaveHandler(saveFolder, originalWorld.getSaveHandler().getWorldDir().getName(), server, server.getDataFixer());
+            World freshWorld = new ServerWorld(server, server.getWorkerExecutor(), saveHandler, originalWorld.getLevelProperties(),
+                    originalWorld.dimension.getType(), originalWorld.getProfiler(), new NoOpChunkStatusListener());
+
+            // Pre-gen all the chunks
+            // We need to also pull one more chunk in every direction
+            CuboidRegion expandedPreGen = new CuboidRegion(region.getMinimumPoint().subtract(16, 0, 16), region.getMaximumPoint().add(16, 0, 16));
+            for (BlockVector2 chunk : expandedPreGen.getChunks()) {
+                freshWorld.getChunk(chunk.getBlockX(), chunk.getBlockZ());
+            }
+
+            FabricWorld from = new FabricWorld(freshWorld);
+            for (BlockVector3 vec : region) {
+                editSession.setBlock(vec, from.getFullBlock(vec));
+            }
+        } catch (MaxChangedBlocksException e) {
+            throw new RuntimeException(e);
+        } finally {
+            saveFolder.delete();
+        }
+
+        return true;
+    }
+
+    @Nullable
+    private static Feature<? extends FeatureConfig> createTreeFeatureGenerator(TreeType type) {
+        switch (type) {
+            case TREE: return new OakTreeFeature(DefaultFeatureConfig::deserialize, true);
+            case BIG_TREE: return new LargeOakTreeFeature(DefaultFeatureConfig::deserialize, true);
+            case REDWOOD: return new PineTreeFeature(DefaultFeatureConfig::deserialize);
+            case TALL_REDWOOD: return new SpruceTreeFeature(DefaultFeatureConfig::deserialize, true);
+            case BIRCH: return new BirchTreeFeature(DefaultFeatureConfig::deserialize, true, false);
+            case JUNGLE: return new MegaJungleTreeFeature(DefaultFeatureConfig::deserialize, true, 10, 20, JUNGLE_LOG, JUNGLE_LEAF);
+            case SMALL_JUNGLE: return new JungleTreeFeature(DefaultFeatureConfig::deserialize, true, 4 + random.nextInt(7), JUNGLE_LOG, JUNGLE_LEAF, false);
+            case SHORT_JUNGLE: return new JungleTreeFeature(DefaultFeatureConfig::deserialize, true, 4 + random.nextInt(7), JUNGLE_LOG, JUNGLE_LEAF, true);
+            case JUNGLE_BUSH: return new JungleGroundBushFeature(DefaultFeatureConfig::deserialize, JUNGLE_LOG, JUNGLE_SHRUB);
+            case SWAMP: return new SwampTreeFeature(DefaultFeatureConfig::deserialize);
+            case ACACIA: return new SavannaTreeFeature(DefaultFeatureConfig::deserialize, true);
+            case DARK_OAK: return new DarkOakTreeFeature(DefaultFeatureConfig::deserialize, true);
+            case MEGA_REDWOOD: return new MegaPineTreeFeature(DefaultFeatureConfig::deserialize, true, random.nextBoolean());
+            case TALL_BIRCH: return new BirchTreeFeature(DefaultFeatureConfig::deserialize, true, true);
+            case RED_MUSHROOM: return new HugeRedMushroomFeature(PlantedFeatureConfig::deserialize);
+            case BROWN_MUSHROOM: return new HugeBrownMushroomFeature(PlantedFeatureConfig::deserialize);
+            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 {
+        @SuppressWarnings("unchecked")
+        Feature<FeatureConfig> generator = (Feature<FeatureConfig>) createTreeFeatureGenerator(type);
+        return generator != null
+                && generator.generate(getWorld(), getWorld().getChunkManager().getChunkGenerator(), random,
+                FabricAdapter.toBlockPos(position), createFeatureConfig(type));
+    }
+
+    @Override
+    public void checkLoadedChunk(BlockVector3 pt) {
+        getWorld().getChunk(FabricAdapter.toBlockPos(pt));
+    }
+
+    @Override
+    public void fixAfterFastMode(Iterable<BlockVector2> chunks) {
+        fixLighting(chunks);
+    }
+
+    @Override
+    public void fixLighting(Iterable<BlockVector2> chunks) {
+        World world = getWorld();
+        for (BlockVector2 chunk : chunks) {
+            world.getChunkManager().getLightingProvider().suppressLight(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);
+        return true;
+    }
+
+    @Override
+    public WeatherType getWeather() {
+        LevelProperties info = getWorld().getLevelProperties();
+        if (info.isThundering()) {
+            return WeatherTypes.THUNDER_STORM;
+        }
+        if (info.isRaining()) {
+            return WeatherTypes.RAIN;
+        }
+        return WeatherTypes.CLEAR;
+    }
+
+    @Override
+    public long getRemainingWeatherDuration() {
+        LevelProperties info = getWorld().getLevelProperties();
+        if (info.isThundering()) {
+            return info.getThunderTime();
+        }
+        if (info.isRaining()) {
+            return info.getRainTime();
+        }
+        return info.getClearWeatherTime();
+    }
+
+    @Override
+    public void setWeather(WeatherType weatherType) {
+        setWeather(weatherType, 0);
+    }
+
+    @Override
+    public void setWeather(WeatherType weatherType, long duration) {
+        LevelProperties info = getWorld().getLevelProperties();
+        if (weatherType == WeatherTypes.THUNDER_STORM) {
+            info.setClearWeatherTime(0);
+            info.setThundering(true);
+            info.setThunderTime((int) duration);
+        } else if (weatherType == WeatherTypes.RAIN) {
+            info.setClearWeatherTime(0);
+            info.setRaining(true);
+            info.setRainTime((int) duration);
+        } else if (weatherType == WeatherTypes.CLEAR) {
+            info.setRaining(false);
+            info.setThundering(false);
+            info.setClearWeatherTime((int) duration);
+        }
+    }
+
+    @Override
+    public int getMaxY() {
+        return getWorld().getHeight() - 1;
+    }
+
+    @Override
+    public BlockVector3 getSpawnPosition() {
+        return FabricAdapter.adapt(getWorld().getSpawnPos());
+    }
+
+    @Override
+    public BlockState getBlock(BlockVector3 position) {
+        net.minecraft.block.BlockState mcState = getWorld()
+                .getChunk(position.getBlockX() >> 4, position.getBlockZ() >> 4)
+                .getBlockState(FabricAdapter.toBlockPos(position));
+
+        BlockState matchingBlock = BlockStateIdAccess.getBlockStateById(Block.getRawIdFromState(mcState));
+        if (matchingBlock != null) {
+            return matchingBlock;
+        }
+
+        return FabricAdapter.adapt(mcState);
+    }
+
+    @Override
+    public BaseBlock getFullBlock(BlockVector3 position) {
+        BlockPos pos = new BlockPos(position.getBlockX(), position.getBlockY(), position.getBlockZ());
+        // Avoid creation by using the CHECK mode -- if it's needed, it'll be re-created anyways
+        BlockEntity tile = ((WorldChunk) getWorld().getChunk(pos)).getBlockEntity(pos, WorldChunk.CreationType.CHECK);
+
+        if (tile != null) {
+            return getBlock(position).toBaseBlock(NBTConverter.fromNative(TileEntityUtils.copyNbtData(tile)));
+        } else {
+            return getBlock(position).toBaseBlock();
+        }
+    }
+
+    @Override
+    public int hashCode() {
+        return getWorld().hashCode();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if ((o instanceof FabricWorld)) {
+            FabricWorld other = ((FabricWorld) o);
+            World otherWorld = other.worldRef.get();
+            World thisWorld = worldRef.get();
+            return otherWorld != null && otherWorld.equals(thisWorld);
+        } else if (o instanceof com.sk89q.worldedit.world.World) {
+            return ((com.sk89q.worldedit.world.World) o).getName().equals(getName());
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public List<? extends Entity> getEntities(Region region) {
+        final World world = getWorld();
+        if (!(world instanceof ServerWorld)) {
+            return Collections.emptyList();
+        }
+        return ((ServerWorld) world).getEntities(null, entity -> true)
+                .stream()
+                .filter(e -> region.contains(FabricAdapter.adapt(e.getBlockPos())))
+                .map(FabricEntity::new).collect(Collectors.toList());
+    }
+
+    @Override
+    public List<? extends Entity> getEntities() {
+        final World world = getWorld();
+        if (!(world instanceof ServerWorld)) {
+            return Collections.emptyList();
+        }
+        return ((ServerWorld) world).getEntities(null, entity -> true)
+                .stream()
+                .map(FabricEntity::new)
+                .collect(Collectors.toList());
+    }
+
+    @Nullable
+    @Override
+    public Entity createEntity(Location location, BaseEntity entity) {
+        World world = getWorld();
+        final Optional<EntityType<?>> entityType = EntityType.get(entity.getType().getId());
+        if (!entityType.isPresent()) return null;
+        net.minecraft.entity.Entity createdEntity = entityType.get().create(world);
+        if (createdEntity != null) {
+            CompoundTag nativeTag = entity.getNbtData();
+            if (nativeTag != null) {
+                net.minecraft.nbt.CompoundTag tag = NBTConverter.toNative(entity.getNbtData());
+                for (String name : Constants.NO_COPY_ENTITY_NBT_FIELDS) {
+                    tag.remove(name);
+                }
+                createdEntity.fromTag(tag);
+            }
+
+            createdEntity.setPositionAndAngles(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
+
+            world.spawnEntity(createdEntity);
+            return new FabricEntity(createdEntity);
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * 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

@@ -0,0 +1,326 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+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.Platform;
+import com.sk89q.worldedit.fabric.net.handler.WECUIPacketHandler;
+import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.world.biome.BiomeType;
+import com.sk89q.worldedit.world.block.BlockCategory;
+import com.sk89q.worldedit.world.block.BlockType;
+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.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.server.MinecraftServer;
+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.hit.BlockHitResult;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.util.registry.Registry;
+import net.minecraft.world.World;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+/**
+ * The Fabric implementation of WorldEdit.
+ */
+public class FabricWorldEdit implements ModInitializer {
+
+    private static final Logger LOGGER = LogManager.getLogger();
+    public static final String MOD_ID = "worldedit";
+    public static final String CUI_PLUGIN_CHANNEL = "cui";
+
+    private FabricPermissionsProvider provider;
+
+    public static FabricWorldEdit inst;
+
+    private FabricPlatform platform;
+    private FabricConfiguration config;
+    private Path workingDir;
+
+    private ModContainer container;
+
+    public FabricWorldEdit() {
+        inst = this;
+    }
+
+    @Override
+    public void onInitialize() {
+        this.container = FabricLoader.getInstance().getModContainer("worldedit").orElseThrow(
+                () -> new IllegalStateException("WorldEdit mod missing in Fabric")
+        );
+
+        // Setup working directory
+        workingDir = new File(FabricLoader.getInstance().getConfigDirectory(), "worldedit").toPath();
+        if (!Files.exists(workingDir)) {
+            try {
+                Files.createDirectory(workingDir);
+            } catch (IOException e) {
+                throw new UncheckedIOException(e);
+            }
+        }
+
+        WECUIPacketHandler.init();
+
+        ServerTickCallback.EVENT.register(ThreadSafeCache.getInstance());
+        ServerStartCallback.EVENT.register(this::onStartServer);
+        ServerStopCallback.EVENT.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 setupPlatform(MinecraftServer server) {
+        this.platform = new FabricPlatform(this, server);
+
+        WorldEdit.getInstance().getPlatformManager().register(platform);
+
+        this.provider = new FabricPermissionsProvider.VanillaPermissionsProvider(platform);
+    }
+
+    private void setupRegistries() {
+        // Blocks
+        for (Identifier name : Registry.BLOCK.getIds()) {
+            if (BlockType.REGISTRY.get(name.toString()) == null) {
+                BlockType.REGISTRY.register(name.toString(), new BlockType(name.toString(),
+                    input -> FabricAdapter.adapt(FabricAdapter.adapt(input.getBlockType()).getDefaultState())));
+            }
+        }
+        // Items
+        for (Identifier name : Registry.ITEM.getIds()) {
+            if (ItemType.REGISTRY.get(name.toString()) == null) {
+                ItemType.REGISTRY.register(name.toString(), new ItemType(name.toString()));
+            }
+        }
+        // Entities
+        for (Identifier name : Registry.ENTITY_TYPE.getIds()) {
+            if (EntityType.REGISTRY.get(name.toString()) == null) {
+                EntityType.REGISTRY.register(name.toString(), new EntityType(name.toString()));
+            }
+        }
+        // Biomes
+        for (Identifier name : Registry.BIOME.getIds()) {
+            if (BiomeType.REGISTRY.get(name.toString()) == null) {
+                BiomeType.REGISTRY.register(name.toString(), new BiomeType(name.toString()));
+            }
+        }
+        // Tags
+        for (Identifier name : BlockTags.getContainer().getKeys()) {
+            if (BlockCategory.REGISTRY.get(name.toString()) == null) {
+                BlockCategory.REGISTRY.register(name.toString(), new BlockCategory(name.toString()));
+            }
+        }
+        for (Identifier name : ItemTags.getContainer().getKeys()) {
+            if (ItemCategory.REGISTRY.get(name.toString()) == null) {
+                ItemCategory.REGISTRY.register(name.toString(), new ItemCategory(name.toString()));
+            }
+        }
+    }
+
+    private void onStartServer(MinecraftServer minecraftServer) {
+        setupPlatform(minecraftServer);
+        setupRegistries();
+
+        config = new FabricConfiguration(this);
+        config.load();
+        WorldEdit.getInstance().getEventBus().post(new PlatformReadyEvent());
+    }
+
+    private void onStopServer(MinecraftServer minecraftServer) {
+        WorldEdit worldEdit = WorldEdit.getInstance();
+        worldEdit.getSessionManager().unload();
+        worldEdit.getPlatformManager().unregister(platform);
+    }
+
+    private boolean shouldSkip() {
+        if (platform == null) {
+            return true;
+        }
+
+        return !platform.isHookingEvents(); // We have to be told to catch these events
+    }
+
+    private ActionResult onLeftClickBlock(PlayerEntity playerEntity, World world, Hand hand, BlockPos blockPos, Direction direction) {
+        if (shouldSkip() || hand == Hand.OFF_HAND || world.isClient) {
+            return ActionResult.PASS;
+        }
+
+        WorldEdit we = WorldEdit.getInstance();
+        FabricPlayer player = adaptPlayer((ServerPlayerEntity) playerEntity);
+        FabricWorld localWorld = getWorld(world);
+        Location pos = new Location(localWorld,
+                blockPos.getX(),
+                blockPos.getY(),
+                blockPos.getZ()
+        );
+
+        if (we.handleBlockLeftClick(player, pos)) {
+            return ActionResult.SUCCESS;
+        }
+
+        if (we.handleArmSwing(player)) {
+            return ActionResult.SUCCESS;
+        }
+
+        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;
+        }
+
+        WorldEdit we = WorldEdit.getInstance();
+        FabricPlayer player = adaptPlayer((ServerPlayerEntity) playerEntity);
+        FabricWorld localWorld = getWorld(world);
+        Location pos = new Location(localWorld,
+                blockHitResult.getBlockPos().getX(),
+                blockHitResult.getBlockPos().getY(),
+                blockHitResult.getBlockPos().getZ()
+        );
+
+        if (we.handleBlockRightClick(player, pos)) {
+            return ActionResult.SUCCESS;
+        }
+
+        if (we.handleRightClick(player)) {
+            return ActionResult.SUCCESS;
+        }
+
+        return ActionResult.PASS;
+    }
+
+    private ActionResult onRightClickAir(PlayerEntity playerEntity, World world, Hand hand) {
+        if (shouldSkip() || hand == Hand.OFF_HAND || world.isClient) {
+            return ActionResult.PASS;
+        }
+
+        WorldEdit we = WorldEdit.getInstance();
+        FabricPlayer player = adaptPlayer((ServerPlayerEntity) playerEntity);
+
+        if (we.handleRightClick(player)) {
+            return ActionResult.SUCCESS;
+        }
+
+        return ActionResult.PASS;
+    }
+
+    // TODO Pass empty left click to server
+
+    /**
+     * Get the configuration.
+     *
+     * @return the Fabric configuration
+     */
+    FabricConfiguration getConfig() {
+        return this.config;
+    }
+
+    /**
+     * Get the session for a player.
+     *
+     * @param player the player
+     * @return the session
+     */
+    public LocalSession getSession(ServerPlayerEntity player) {
+        checkNotNull(player);
+        return WorldEdit.getInstance().getSessionManager().get(adaptPlayer(player));
+    }
+
+    /**
+     * Get the WorldEdit proxy for the given world.
+     *
+     * @param world the world
+     * @return the WorldEdit world
+     */
+    public FabricWorld getWorld(World world) {
+        checkNotNull(world);
+        return new FabricWorld(world);
+    }
+
+    /**
+     * Get the WorldEdit proxy for the platform.
+     *
+     * @return the WorldEdit platform
+     */
+    public Platform getPlatform() {
+        return this.platform;
+    }
+
+    /**
+     * Get the working directory where WorldEdit's files are stored.
+     *
+     * @return the working directory
+     */
+    public File getWorkingDir() {
+        return this.workingDir.toFile();
+    }
+
+    /**
+     * Get the version of the WorldEdit-Fabric implementation.
+     *
+     * @return a version string
+     */
+    String getInternalVersion() {
+        return container.getMetadata().getVersion().getFriendlyString();
+    }
+
+    public void setPermissionsProvider(FabricPermissionsProvider provider) {
+        this.provider = provider;
+    }
+
+    public FabricPermissionsProvider getPermissionsProvider() {
+        return provider;
+    }
+}

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

@@ -0,0 +1,252 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.sk89q.jnbt.ByteArrayTag;
+import com.sk89q.jnbt.ByteTag;
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.jnbt.DoubleTag;
+import com.sk89q.jnbt.EndTag;
+import com.sk89q.jnbt.FloatTag;
+import com.sk89q.jnbt.IntArrayTag;
+import com.sk89q.jnbt.IntTag;
+import com.sk89q.jnbt.ListTag;
+import com.sk89q.jnbt.LongTag;
+import com.sk89q.jnbt.ShortTag;
+import com.sk89q.jnbt.StringTag;
+import com.sk89q.jnbt.Tag;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+/**
+ * Converts between JNBT and Minecraft NBT classes.
+ */
+final class NBTConverter {
+
+    private NBTConverter() {
+    }
+
+    public static net.minecraft.nbt.Tag toNative(Tag tag) {
+        if (tag instanceof IntArrayTag) {
+            return toNative((IntArrayTag) tag);
+
+        } else if (tag instanceof ListTag) {
+            return toNative((ListTag) tag);
+
+        } else if (tag instanceof LongTag) {
+            return toNative((LongTag) tag);
+
+        } else if (tag instanceof StringTag) {
+            return toNative((StringTag) tag);
+
+        } else if (tag instanceof IntTag) {
+            return toNative((IntTag) tag);
+
+        } else if (tag instanceof ByteTag) {
+            return toNative((ByteTag) tag);
+
+        } else if (tag instanceof ByteArrayTag) {
+            return toNative((ByteArrayTag) tag);
+
+        } else if (tag instanceof CompoundTag) {
+            return toNative((CompoundTag) tag);
+
+        } else if (tag instanceof FloatTag) {
+            return toNative((FloatTag) tag);
+
+        } else if (tag instanceof ShortTag) {
+            return toNative((ShortTag) tag);
+
+        } else if (tag instanceof DoubleTag) {
+            return toNative((DoubleTag) tag);
+        } else {
+            throw new IllegalArgumentException("Can't convert tag of type " + tag.getClass().getCanonicalName());
+        }
+    }
+
+    public static net.minecraft.nbt.IntArrayTag toNative(IntArrayTag tag) {
+        int[] value = tag.getValue();
+        return new net.minecraft.nbt.IntArrayTag(Arrays.copyOf(value, value.length));
+    }
+
+    public static net.minecraft.nbt.ListTag toNative(ListTag tag) {
+        net.minecraft.nbt.ListTag list = new net.minecraft.nbt.ListTag();
+        for (Tag child : tag.getValue()) {
+            if (child instanceof EndTag) {
+                continue;
+            }
+            list.add(toNative(child));
+        }
+        return list;
+    }
+
+    public static net.minecraft.nbt.LongTag toNative(LongTag tag) {
+        return new net.minecraft.nbt.LongTag(tag.getValue());
+    }
+
+    public static net.minecraft.nbt.StringTag toNative(StringTag tag) {
+        return new net.minecraft.nbt.StringTag(tag.getValue());
+    }
+
+    public static net.minecraft.nbt.IntTag toNative(IntTag tag) {
+        return new net.minecraft.nbt.IntTag(tag.getValue());
+    }
+
+    public static net.minecraft.nbt.ByteTag toNative(ByteTag tag) {
+        return new net.minecraft.nbt.ByteTag(tag.getValue());
+    }
+
+    public static net.minecraft.nbt.ByteArrayTag toNative(ByteArrayTag tag) {
+        byte[] value = tag.getValue();
+        return new net.minecraft.nbt.ByteArrayTag(Arrays.copyOf(value, value.length));
+    }
+
+    public static net.minecraft.nbt.CompoundTag toNative(CompoundTag tag) {
+        net.minecraft.nbt.CompoundTag compound = new net.minecraft.nbt.CompoundTag();
+        for (Entry<String, Tag> child : tag.getValue().entrySet()) {
+            compound.put(child.getKey(), toNative(child.getValue()));
+        }
+        return compound;
+    }
+
+    public static net.minecraft.nbt.FloatTag toNative(FloatTag tag) {
+        return new net.minecraft.nbt.FloatTag(tag.getValue());
+    }
+
+    public static net.minecraft.nbt.ShortTag toNative(ShortTag tag) {
+        return new net.minecraft.nbt.ShortTag(tag.getValue());
+    }
+
+    public static net.minecraft.nbt.DoubleTag toNative(DoubleTag tag) {
+        return new net.minecraft.nbt.DoubleTag(tag.getValue());
+    }
+
+    public static Tag fromNative(net.minecraft.nbt.Tag other) {
+        if (other instanceof net.minecraft.nbt.IntArrayTag) {
+            return fromNative((net.minecraft.nbt.IntArrayTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.ListTag) {
+            return fromNative((net.minecraft.nbt.ListTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.EndTag) {
+            return fromNative((net.minecraft.nbt.EndTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.LongTag) {
+            return fromNative((net.minecraft.nbt.LongTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.StringTag) {
+            return fromNative((net.minecraft.nbt.StringTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.IntTag) {
+            return fromNative((net.minecraft.nbt.IntTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.ByteTag) {
+            return fromNative((net.minecraft.nbt.ByteTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.ByteArrayTag) {
+            return fromNative((net.minecraft.nbt.ByteArrayTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.CompoundTag) {
+            return fromNative((net.minecraft.nbt.CompoundTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.FloatTag) {
+            return fromNative((net.minecraft.nbt.FloatTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.ShortTag) {
+            return fromNative((net.minecraft.nbt.ShortTag) other);
+
+        } else if (other instanceof net.minecraft.nbt.DoubleTag) {
+            return fromNative((net.minecraft.nbt.DoubleTag) other);
+        } else {
+            throw new IllegalArgumentException("Can't convert other of type " + other.getClass().getCanonicalName());
+        }
+    }
+
+    public static IntArrayTag fromNative(net.minecraft.nbt.IntArrayTag other) {
+        int[] value = other.getIntArray();
+        return new IntArrayTag(Arrays.copyOf(value, value.length));
+    }
+
+    public static ListTag fromNative(net.minecraft.nbt.ListTag other) {
+        other = (net.minecraft.nbt.ListTag) other.copy();
+        List<Tag> list = new ArrayList<>();
+        Class<? extends Tag> listClass = StringTag.class;
+        int tags = other.size();
+        for (int i = 0; i < tags; i++) {
+            Tag child = fromNative(other.remove(0));
+            list.add(child);
+            listClass = child.getClass();
+        }
+        return new ListTag(listClass, list);
+    }
+
+    public static EndTag fromNative(net.minecraft.nbt.EndTag other) {
+        return new EndTag();
+    }
+
+    public static LongTag fromNative(net.minecraft.nbt.LongTag other) {
+        return new LongTag(other.getLong());
+    }
+
+    public static StringTag fromNative(net.minecraft.nbt.StringTag other) {
+        return new StringTag(other.asString());
+    }
+
+    public static IntTag fromNative(net.minecraft.nbt.IntTag other) {
+        return new IntTag(other.getInt());
+    }
+
+    public static ByteTag fromNative(net.minecraft.nbt.ByteTag other) {
+        return new ByteTag(other.getByte());
+    }
+
+    public static ByteArrayTag fromNative(net.minecraft.nbt.ByteArrayTag other) {
+        byte[] value = other.getByteArray();
+        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)));
+        }
+        return new CompoundTag(map);
+    }
+
+    public static FloatTag fromNative(net.minecraft.nbt.FloatTag other) {
+        return new FloatTag(other.getFloat());
+    }
+
+    public static ShortTag fromNative(net.minecraft.nbt.ShortTag other) {
+        return new ShortTag(other.getShort());
+    }
+
+    public static DoubleTag fromNative(net.minecraft.nbt.DoubleTag other) {
+        return new DoubleTag(other.getDouble());
+    }
+
+}

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

@@ -0,0 +1,70 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+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;
+
+class PropertyAdapter<T extends Comparable<T>> implements Property<T> {
+
+    private final net.minecraft.state.property.Property<T> property;
+    private final List<T> values;
+
+    public PropertyAdapter(net.minecraft.state.property.Property<T> property) {
+        this.property = property;
+        this.values = ImmutableList.copyOf(property.getValues());
+    }
+
+    @Override
+    public String getName() {
+        return property.getName();
+    }
+
+    @Override
+    public List<T> getValues() {
+        return values;
+    }
+
+    @Override
+    public T getValueFor(String string) throws IllegalArgumentException {
+        Optional<T> val = property.getValue(string);
+        checkArgument(val.isPresent(), "%s has no value for %s", getName(), string);
+        return val.get();
+    }
+
+    @Override
+    public int hashCode() {
+        return getName().hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof Property)) {
+            return false;
+        }
+        return getName().equals(((Property<?>) obj).getName());
+    }
+
+}

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

@@ -0,0 +1,76 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import net.fabricmc.fabric.api.event.server.ServerTickCallback;
+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;
+import java.util.concurrent.CopyOnWriteArraySet;
+
+/**
+ * Caches data that cannot be accessed from another thread safely.
+ */
+public class ThreadSafeCache implements ServerTickCallback {
+
+    private static final long REFRESH_DELAY = 1000 * 30;
+    private static final ThreadSafeCache INSTANCE = new ThreadSafeCache();
+    private Set<UUID> onlineIds = Collections.emptySet();
+    private long lastRefresh = 0;
+
+    /**
+     * Get an concurrent-safe set of UUIDs of online players.
+     *
+     * @return a set of UUIDs
+     */
+    public Set<UUID> getOnlineIds() {
+        return onlineIds;
+    }
+
+    @Override
+    public void tick(MinecraftServer server) {
+        long now = System.currentTimeMillis();
+
+        if (now - lastRefresh > REFRESH_DELAY) {
+            Set<UUID> onlineIds = new HashSet<>();
+
+            if (server == null) {
+                return;
+            }
+            for (ServerPlayerEntity player : server.getPlayerManager().getPlayerList()) {
+                if (player != null) {
+                    onlineIds.add(player.getUuid());
+                }
+            }
+
+            this.onlineIds = new CopyOnWriteArraySet<>(onlineIds);
+
+            lastRefresh = now;
+        }
+    }
+
+    public static ThreadSafeCache getInstance() {
+        return INSTANCE;
+    }
+}

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

@@ -0,0 +1,79 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.sk89q.worldedit.math.BlockVector3;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.IntTag;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+
+import javax.annotation.Nullable;
+
+/**
+ * Utility methods for setting tile entities in the world.
+ */
+final class TileEntityUtils {
+
+    private TileEntityUtils() {
+    }
+
+    /**
+     * Update the given tag compound with position information.
+     *
+     * @param tag the tag
+     * @param position the position
+     */
+    private static void updateForSet(CompoundTag tag, BlockVector3 position) {
+        checkNotNull(tag);
+        checkNotNull(position);
+
+        tag.put("x", new IntTag(position.getBlockX()));
+        tag.put("y", new IntTag(position.getBlockY()));
+        tag.put("z", new IntTag(position.getBlockZ()));
+    }
+
+    /**
+     * Set a tile entity at the given location using the tile entity ID from
+     * the tag.
+     *
+     * @param world the world
+     * @param position the position
+     * @param tag the tag for the tile entity (may be null to do nothing)
+     */
+    static void setTileEntity(World world, BlockVector3 position, @Nullable CompoundTag tag) {
+        if (tag != null) {
+            updateForSet(tag, position);
+            BlockEntity tileEntity = BlockEntity.createFromTag(tag);
+            if (tileEntity != null) {
+                world.setBlockEntity(new BlockPos(position.getBlockX(), position.getBlockY(), position.getBlockZ()), tileEntity);
+            }
+        }
+    }
+
+    public static CompoundTag copyNbtData(BlockEntity tile) {
+        CompoundTag tag = new CompoundTag();
+        tile.toTag(tag);
+        return tag;
+    }
+}

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

@@ -0,0 +1,73 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import com.mojang.authlib.GameProfile;
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.damage.DamageSource;
+import net.minecraft.network.chat.Component;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.network.ServerPlayerInteractionManager;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.stat.Stat;
+import net.minecraft.world.dimension.DimensionType;
+
+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]");
+
+    public WorldEditFakePlayer(ServerWorld world) {
+        super(world.getServer(), world, FAKE_WORLDEDIT_PROFILE, new ServerPlayerInteractionManager(world));
+    }
+
+    @Override
+    public void tick() {
+    }
+
+    @Override
+    public void increaseStat(Stat<?> stat, int incrementer) {
+    }
+
+    @Override
+    public void incrementStat(Stat<?> stat) {
+    }
+
+    @Override
+    public void sendMessage(Component component) {
+    }
+
+    @Override
+    public void addChatMessage(Component component, boolean opt) {
+    }
+
+    @Nullable
+    @Override
+    public Entity changeDimension(DimensionType dimensionType) {
+        return this;
+    }
+
+    @Override
+    public boolean isInvulnerableTo(DamageSource damageSource) {
+        return true;
+    }
+}

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

@@ -0,0 +1,45 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric.mixin;
+
+import com.mojang.authlib.GameProfile;
+import com.sk89q.worldedit.fabric.FabricWorldEdit;
+import net.minecraft.container.ContainerListener;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.util.Hand;
+import net.minecraft.world.World;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+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 MixinServerPlayerEntity(World world, GameProfile gameProfile) {
+        super(world, gameProfile);
+    }
+
+    @Inject(method = "swingHand", at = @At(value = "HEAD"))
+    public void onSwing(Hand hand, CallbackInfo injectionInfo) {
+        FabricWorldEdit.inst.onLeftClickAir(this, this.world, hand);
+    }
+}

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

@@ -0,0 +1,61 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric.net.handler;
+
+import com.sk89q.worldedit.LocalSession;
+import com.sk89q.worldedit.fabric.FabricAdapter;
+import com.sk89q.worldedit.fabric.FabricPlayer;
+import com.sk89q.worldedit.fabric.FabricWorldEdit;
+import net.fabricmc.fabric.api.network.PacketConsumer;
+import net.fabricmc.fabric.api.network.PacketContext;
+import net.fabricmc.fabric.api.network.ServerSidePacketRegistry;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.network.packet.CustomPayloadS2CPacket;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.network.packet.CustomPayloadC2SPacket;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.PacketByteBuf;
+
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+
+public final class WECUIPacketHandler {
+    private WECUIPacketHandler() {
+    }
+
+    public static final Charset UTF_8_CHARSET = StandardCharsets.UTF_8;
+    private static final Identifier CUI_IDENTIFIER = new Identifier(FabricWorldEdit.MOD_ID, FabricWorldEdit.CUI_PLUGIN_CHANNEL);
+
+    public static void init() {
+        ServerSidePacketRegistry.INSTANCE.register(CUI_IDENTIFIER, (packetContext, packetByteBuf) -> {
+            ServerPlayerEntity player = (ServerPlayerEntity) packetContext.getPlayer();
+            LocalSession session = FabricWorldEdit.inst.getSession(player);
+
+            if (session.hasCUISupport()) {
+                return;
+            }
+
+            String text = packetByteBuf.toString(UTF_8_CHARSET);
+            final FabricPlayer actor = FabricAdapter.adaptPlayer(player);
+            session.handleCUIInitializationMessage(text, actor);
+            session.describeCUI(actor);
+        });
+    }
+}

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

@@ -0,0 +1,33 @@
+#Don't put comments; they get removed
+default-max-polygon-points=-1
+schematic-save-dir=schematics
+super-pickaxe-many-drop-items=true
+register-help=true
+nav-wand-item=minecraft:compass
+profile=false
+trace-unflushed-sessions=false
+super-pickaxe-drop-items=true
+disallowed-blocks=minecraft:oak_sapling,minecraft:jungle_sapling,minecraft:dark_oak_sapling,minecraft:spruce_sapling,minecraft:birch_sapling,minecraft:acacia_sapling,minecraft:black_bed,minecraft:blue_bed,minecraft:brown_bed,minecraft:cyan_bed,minecraft:gray_bed,minecraft:green_bed,minecraft:light_blue_bed,minecraft:light_gray_bed,minecraft:lime_bed,minecraft:magenta_bed,minecraft:orange_bed,minecraft:pink_bed,minecraft:purple_bed,minecraft:red_bed,minecraft:white_bed,minecraft:yellow_bed,minecraft:powered_rail,minecraft:detector_rail,minecraft:grass,minecraft:dead_bush,minecraft:moving_piston,minecraft:piston_head,minecraft:sunflower,minecraft:rose_bush,minecraft:dandelion,minecraft:poppy,minecraft:brown_mushroom,minecraft:red_mushroom,minecraft:tnt,minecraft:torch,minecraft:fire,minecraft:redstone_wire,minecraft:wheat,minecraft:potatoes,minecraft:carrots,minecraft:melon_stem,minecraft:pumpkin_stem,minecraft:beetroots,minecraft:rail,minecraft:lever,minecraft:redstone_torch,minecraft:redstone_wall_torch,minecraft:repeater,minecraft:comparator,minecraft:stone_button,minecraft:birch_button,minecraft:acacia_button,minecraft:dark_oak_button,minecraft:jungle_button,minecraft:oak_button,minecraft:spruce_button,minecraft:cactus,minecraft:sugar_cane,minecraft:bedrock
+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
+snapshots-dir=
+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
+nav-wand-distance=50
+butcher-default-radius=-1
+default-max-changed-blocks=-1
+history-size=15
+use-inventory=false
+allow-symbolic-links=false
+use-inventory-override=false
+log-commands=false
+butcher-max-radius=-1
+max-polygon-points=20
+max-radius=-1

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

@@ -0,0 +1,37 @@
+{
+    "schemaVersion": 1,
+    "id": "worldedit",
+    "version": "${version}",
+
+    "name": "WorldEdit",
+    "description": "WorldEdit is an easy-to-use in-game world editor for Minecraft, supporting both single- and multi-player.",
+    "authors": [
+        "sk89q",
+        "wizjany",
+        "TomyLobo",
+        "kenzierocks",
+        "Me4502"
+    ],
+    "contact": {
+        "homepage": "https://enginehub.org/worldedit/",
+        "sources": "https://github.com/EngineHub/WorldEdit"
+    },
+
+    "license": "GPL3",
+    "icon": "assets/worldedit/icon.png",
+
+    "environment": "*",
+    "entrypoints": {
+        "main": [
+            "com.sk89q.worldedit.fabric.FabricWorldEdit"
+        ]
+    },
+
+    "depends": {
+        "fabricloader": ">=0.4.0",
+        "fabric": "*"
+    },
+    "mixins": [
+        "worldedit.mixins.json"
+    ]
+}

worldedit-fabric/src/main/resources/pack.mcmeta

@@ -0,0 +1,6 @@
+{
+    "pack": {
+        "description": "WorldEdit Resources",
+        "pack_format": 4
+    }
+}

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

@@ -0,0 +1,13 @@
+{
+    "required": true,
+    "package": "com.sk89q.worldedit.fabric.mixin",
+    "compatibilityLevel": "JAVA_8",
+    "mixins": [
+        "MixinServerPlayerEntity"
+    ],
+    "server": [
+    ],
+    "injectors": {
+        "defaultRequire": 1
+    }
+}

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

@@ -124,7 +124,7 @@ public class ForgePlayer extends AbstractPlayerActor {
             send = send + "|" + StringUtil.joinString(params, "|");
         }
         PacketBuffer buffer = new PacketBuffer(Unpooled.copiedBuffer(send.getBytes(WECUIPacketHandler.UTF_8_CHARSET)));
-        SCustomPayloadPlayPacket packet = new SCustomPayloadPlayPacket(new ResourceLocation(ForgeWorldEdit.CUI_PLUGIN_CHANNEL), buffer);
+        SCustomPayloadPlayPacket packet = new SCustomPayloadPlayPacket(new ResourceLocation(ForgeWorldEdit.MOD_ID, ForgeWorldEdit.CUI_PLUGIN_CHANNEL), buffer);
         this.player.connection.sendPacket(packet);
     }