Merge branch '1.16' into update-adapters

HEADER.txt

@@ -2,15 +2,15 @@ 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
+This program is free software: you can redistribute it and/or modify
-under the terms of the GNU Lesser General Public License as published by the
+it under the terms of the GNU General Public License as published by
-Free Software Foundation, either version 3 of the License, or
+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
+This program is distributed in the hope that it will be useful,
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+but WITHOUT ANY WARRANTY; without even the implied warranty of
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-for more details.
+GNU General Public License for more details.
 
-You should have received a copy of the GNU Lesser General Public License
+You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
+along with this program.  If not, see <https://www.gnu.org/licenses/>.

LICENSE.txt

@@ -1,176 +1,3 @@
---------------------
-Contribution License
---------------------
-
-New contributions must be licensed under:
-
-                   GNU LESSER GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-
-  This version of the GNU Lesser General Public License incorporates
-the terms and conditions of version 3 of the GNU General Public
-License, supplemented by the additional permissions listed below.
-
-  0. Additional Definitions.
-
-  As used herein, "this License" refers to version 3 of the GNU Lesser
-General Public License, and the "GNU GPL" refers to version 3 of the GNU
-General Public License.
-
-  "The Library" refers to a covered work governed by this License,
-other than an Application or a Combined Work as defined below.
-
-  An "Application" is any work that makes use of an interface provided
-by the Library, but which is not otherwise based on the Library.
-Defining a subclass of a class defined by the Library is deemed a mode
-of using an interface provided by the Library.
-
-  A "Combined Work" is a work produced by combining or linking an
-Application with the Library.  The particular version of the Library
-with which the Combined Work was made is also called the "Linked
-Version".
-
-  The "Minimal Corresponding Source" for a Combined Work means the
-Corresponding Source for the Combined Work, excluding any source code
-for portions of the Combined Work that, considered in isolation, are
-based on the Application, and not on the Linked Version.
-
-  The "Corresponding Application Code" for a Combined Work means the
-object code and/or source code for the Application, including any data
-and utility programs needed for reproducing the Combined Work from the
-Application, but excluding the System Libraries of the Combined Work.
-
-  1. Exception to Section 3 of the GNU GPL.
-
-  You may convey a covered work under sections 3 and 4 of this License
-without being bound by section 3 of the GNU GPL.
-
-  2. Conveying Modified Versions.
-
-  If you modify a copy of the Library, and, in your modifications, a
-facility refers to a function or data to be supplied by an Application
-that uses the facility (other than as an argument passed when the
-facility is invoked), then you may convey a copy of the modified
-version:
-
-   a) under this License, provided that you make a good faith effort to
-   ensure that, in the event an Application does not supply the
-   function or data, the facility still operates, and performs
-   whatever part of its purpose remains meaningful, or
-
-   b) under the GNU GPL, with none of the additional permissions of
-   this License applicable to that copy.
-
-  3. Object Code Incorporating Material from Library Header Files.
-
-  The object code form of an Application may incorporate material from
-a header file that is part of the Library.  You may convey such object
-code under terms of your choice, provided that, if the incorporated
-material is not limited to numerical parameters, data structure
-layouts and accessors, or small macros, inline functions and templates
-(ten or fewer lines in length), you do both of the following:
-
-   a) Give prominent notice with each copy of the object code that the
-   Library is used in it and that the Library and its use are
-   covered by this License.
-
-   b) Accompany the object code with a copy of the GNU GPL and this license
-   document.
-
-  4. Combined Works.
-
-  You may convey a Combined Work under terms of your choice that,
-taken together, effectively do not restrict modification of the
-portions of the Library contained in the Combined Work and reverse
-engineering for debugging such modifications, if you also do each of
-the following:
-
-   a) Give prominent notice with each copy of the Combined Work that
-   the Library is used in it and that the Library and its use are
-   covered by this License.
-
-   b) Accompany the Combined Work with a copy of the GNU GPL and this license
-   document.
-
-   c) For a Combined Work that displays copyright notices during
-   execution, include the copyright notice for the Library among
-   these notices, as well as a reference directing the user to the
-   copies of the GNU GPL and this license document.
-
-   d) Do one of the following:
-
-       0) Convey the Minimal Corresponding Source under the terms of this
-       License, and the Corresponding Application Code in a form
-       suitable for, and under terms that permit, the user to
-       recombine or relink the Application with a modified version of
-       the Linked Version to produce a modified Combined Work, in the
-       manner specified by section 6 of the GNU GPL for conveying
-       Corresponding Source.
-
-       1) Use a suitable shared library mechanism for linking with the
-       Library.  A suitable mechanism is one that (a) uses at run time
-       a copy of the Library already present on the user's computer
-       system, and (b) will operate properly with a modified version
-       of the Library that is interface-compatible with the Linked
-       Version.
-
-   e) Provide Installation Information, but only if you would otherwise
-   be required to provide such information under section 6 of the
-   GNU GPL, and only to the extent that such information is
-   necessary to install and execute a modified version of the
-   Combined Work produced by recombining or relinking the
-   Application with a modified version of the Linked Version. (If
-   you use option 4d0, the Installation Information must accompany
-   the Minimal Corresponding Source and Corresponding Application
-   Code. If you use option 4d1, you must provide the Installation
-   Information in the manner specified by section 6 of the GNU GPL
-   for conveying Corresponding Source.)
-
-  5. Combined Libraries.
-
-  You may place library facilities that are a work based on the
-Library side by side in a single library together with other library
-facilities that are not Applications and are not covered by this
-License, and convey such a combined library under terms of your
-choice, if you do both of the following:
-
-   a) Accompany the combined library with a copy of the same work based
-   on the Library, uncombined with any other library facilities,
-   conveyed under the terms of this License.
-
-   b) Give prominent notice with the combined library that part of it
-   is a work based on the Library, and explaining where to find the
-   accompanying uncombined form of the same work.
-
-  6. Revised Versions of the GNU Lesser General Public License.
-
-  The Free Software Foundation may publish revised and/or new versions
-of the GNU Lesser General Public License from time to time. Such new
-versions will be similar in spirit to the present version, but may
-differ in detail to address new problems or concerns.
-
-  Each version is given a distinguishing version number. If the
-Library as you received it specifies that a certain numbered version
-of the GNU Lesser General Public License "or any later version"
-applies to it, you have the option of following the terms and
-conditions either of that published version or of any later version
-published by the Free Software Foundation. If the Library as you
-received it does not specify a version number of the GNU Lesser
-General Public License, you may choose any version of the GNU Lesser
-General Public License ever published by the Free Software Foundation.
-
-  If the Library as you received it specifies that a proxy can decide
-whether future versions of the GNU Lesser General Public License shall
-apply, that proxy's public statement of acceptance of any version is
-permanent authorization for you to choose that version for the
-Library.
-
-
 -----------------
 WorldEdit License
 -----------------
@@ -857,3 +684,29 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
+
+----------------------------
+text and text-extras License
+----------------------------
+
+MIT License
+
+Copyright (c) 2017-2020 KyoriPowered
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

buildSrc/src/main/kotlin/CommonConfig.kt

@@ -19,6 +19,7 @@ fun Project.applyCommonConfiguration() {
                 artifact("/[organisation]/[revision]/artifact/[module].[ext]")
             }}
     }
+
     configurations.all {
         resolutionStrategy {
             cacheChangingModulesFor(5, "MINUTES")

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

@@ -393,6 +393,15 @@ public class AsyncBlock implements Block {
         return this.getUnsafeBlock().rayTrace(arg0, arg1, arg2, arg3);
     }
 
+    public boolean applyBoneMeal(@NotNull BlockFace face) {
+        throw new UnsupportedOperationException("FAWE does not support this method");
+    }
+
+    public String getTranslationKey() {
+        throw new UnsupportedOperationException("FAWE does not support this yet");
+    }
+
+
     @NotNull
     @Override
     public BoundingBox getBoundingBox() {

worldedit-core/doctools/src/main/kotlin/com/sk89q/worldedit/internal/util/RstWorldEditText.kt

@@ -1,3 +1,22 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.sk89q.worldedit.internal.util
 
 import com.sk89q.worldedit.util.formatting.WorldEditText

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

@@ -25,9 +25,9 @@ import com.google.common.collect.ImmutableSet;
 import com.sk89q.worldedit.UnknownDirectionException;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.entity.Player;
-import com.sk89q.worldedit.extension.platform.Actor;
 import com.sk89q.worldedit.internal.annotation.Direction;
 import com.sk89q.worldedit.internal.annotation.MultiDirection;
+import com.sk89q.worldedit.internal.annotation.OptionalArg;
 import com.sk89q.worldedit.util.formatting.text.Component;
 import com.sk89q.worldedit.util.formatting.text.TextComponent;
 import org.enginehub.piston.CommandManager;
@@ -58,12 +58,12 @@ public abstract class AbstractDirectionConverter<D> implements ArgumentConverter
     protected static <D> void register(CommandManager commandManager, AbstractDirectionConverter<D> converter,
                                        Class<D> keyClass, boolean includeDiagonals) {
         commandManager.registerConverter(
-                Key.of(keyClass, direction(includeDiagonals)),
+            Key.of(keyClass, direction(includeDiagonals)),
-                converter
+            converter
         );
         commandManager.registerConverter(
-                Key.of(keyClass, multiDirection(includeDiagonals)),
+            Key.of(keyClass, multiDirection(includeDiagonals)),
-                CommaSeparatedValuesConverter.wrap(converter)
+            CommaSeparatedValuesConverter.wrap(converter)
         );
     }
 
@@ -93,8 +93,8 @@ public abstract class AbstractDirectionConverter<D> implements ArgumentConverter
 
     @Override
     public ConversionResult<D> convert(String argument, InjectedValueAccess context) {
-        Player player = context.injectedValue(Key.of(Actor.class))
+        Player player = context.injectedValue(Key.of(Player.class, OptionalArg.class))
-                .filter(Player.class::isInstance).map(Player.class::cast).orElse(null);
+            .orElse(null);
         try {
             return SuccessfulConversion.fromSingle(convertDirection(argument, player, includeDiagonals));
         } catch (Exception e) {

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

@@ -29,7 +29,7 @@ import javax.annotation.Nullable;
 
 public final class DirectionVectorConverter extends AbstractDirectionConverter<BlockVector3> {
 
-    private DirectionVectorConverter(WorldEdit worldEdit, boolean includeDiagonals) {
+    public DirectionVectorConverter(WorldEdit worldEdit, boolean includeDiagonals) {
         super(worldEdit, includeDiagonals);
     }
 

worldedit-core/src/main/java/com/sk89q/worldedit/command/argument/OffsetConverter.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 General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.command.argument;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Iterables;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.internal.annotation.Offset;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.formatting.text.Component;
+import com.sk89q.worldedit.util.formatting.text.TextComponent;
+import org.enginehub.piston.CommandManager;
+import org.enginehub.piston.converter.ArgumentConverter;
+import org.enginehub.piston.converter.ConversionResult;
+import org.enginehub.piston.inject.InjectedValueAccess;
+import org.enginehub.piston.inject.Key;
+
+import java.util.List;
+
+public class OffsetConverter implements ArgumentConverter<BlockVector3> {
+
+    public static void register(WorldEdit worldEdit, CommandManager commandManager) {
+        commandManager.registerConverter(
+            Key.of(BlockVector3.class, Offset.class),
+            new OffsetConverter(worldEdit)
+        );
+    }
+
+    private final DirectionVectorConverter directionVectorConverter;
+    private final VectorConverter<Integer, BlockVector3> vectorConverter =
+        VectorConverter.BLOCK_VECTOR_3_CONVERTER;
+
+    private OffsetConverter(WorldEdit worldEdit) {
+        directionVectorConverter = new DirectionVectorConverter(worldEdit, true);
+    }
+
+    @Override
+    public Component describeAcceptableArguments() {
+        return TextComponent.builder()
+            .append(directionVectorConverter.describeAcceptableArguments())
+            .append(", or ")
+            .append(vectorConverter.describeAcceptableArguments())
+            .build();
+    }
+
+    @Override
+    public List<String> getSuggestions(String input, InjectedValueAccess context) {
+        return ImmutableList.copyOf(Iterables.concat(
+            directionVectorConverter.getSuggestions(input, context),
+            vectorConverter.getSuggestions(input, context)
+        ));
+    }
+
+    @Override
+    public ConversionResult<BlockVector3> convert(String input, InjectedValueAccess context) {
+        return directionVectorConverter.convert(input, context)
+            .orElse(vectorConverter.convert(input, context));
+    }
+}

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

@@ -40,12 +40,22 @@ import java.util.List;
 import java.util.function.Function;
 
 public class VectorConverter<C, T> implements ArgumentConverter<T> {
+
+    private static final CommaSeparatedValuesConverter<Integer> INT_CONVERTER =
+        CommaSeparatedValuesConverter.wrap(ArgumentConverters.get(TypeToken.of(int.class)));
+
+    public static final VectorConverter<Integer, BlockVector3> BLOCK_VECTOR_3_CONVERTER = new VectorConverter<>(
+        INT_CONVERTER,
+        3,
+        cmps -> BlockVector3.at(cmps.get(0), cmps.get(1), cmps.get(2)),
+        "block vector with x, y, and z"
+    );
+
     public static void register(CommandManager commandManager) {
-        CommaSeparatedValuesConverter<Integer> intConverter = CommaSeparatedValuesConverter.wrap(ArgumentConverters.get(TypeToken.of(int.class)));
         CommaSeparatedValuesConverter<Double> doubleConverter = CommaSeparatedValuesConverter.wrap(ArgumentConverters.get(TypeToken.of(double.class)));
         commandManager.registerConverter(Key.of(BlockVector2.class),
             new VectorConverter<>(
-                intConverter,
+                INT_CONVERTER,
                 2,
                 cmps -> BlockVector2.at(cmps.get(0), cmps.get(1)),
                 "block vector with x and z"
@@ -57,13 +67,7 @@ public class VectorConverter<C, T> implements ArgumentConverter<T> {
                 cmps -> Vector2.at(cmps.get(0), cmps.get(1)),
                 "vector with x and z"
             ));
-        commandManager.registerConverter(Key.of(BlockVector3.class),
+        commandManager.registerConverter(Key.of(BlockVector3.class), BLOCK_VECTOR_3_CONVERTER);
-            new VectorConverter<>(
-                intConverter,
-                3,
-                cmps -> BlockVector3.at(cmps.get(0), cmps.get(1), cmps.get(2)),
-                "block vector with x, y, and z"
-            ));
         commandManager.registerConverter(Key.of(Vector3.class),
             new VectorConverter<>(
                 doubleConverter,

worldedit-core/src/main/java/com/sk89q/worldedit/command/tool/StackTool.java

@@ -0,0 +1,85 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.command.tool;
+
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.LocalConfiguration;
+import com.sk89q.worldedit.LocalSession;
+import com.sk89q.worldedit.MaxChangedBlocksException;
+import com.sk89q.worldedit.entity.Player;
+import com.sk89q.worldedit.extension.platform.Actor;
+import com.sk89q.worldedit.extension.platform.Platform;
+import com.sk89q.worldedit.extent.inventory.BlockBag;
+import com.sk89q.worldedit.function.mask.Mask;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.Direction;
+import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+
+import javax.annotation.Nullable;
+
+public class StackTool implements BlockTool {
+
+    private final int range;
+    private final Mask mask;
+
+    public StackTool(int range, Mask mask) {
+        this.range = range;
+        this.mask = mask;
+    }
+
+    @Override
+    public boolean actPrimary(Platform server, LocalConfiguration config, Player player, LocalSession session, Location clicked, @Nullable Direction face) {
+        if (face == null) {
+            return false;
+        }
+        BlockBag bag = session.getBlockBag(player);
+
+        try (EditSession editSession = session.createEditSession(player)) {
+            BlockStateHolder<?> block = editSession.getFullBlock(clicked.toVector().toBlockPoint());
+
+            try {
+                editSession.disableBuffering();
+                BlockVector3 position = clicked.toVector().toBlockPoint();
+                for (int i = 0; i < range; i++) {
+                    position = position.add(face.toBlockVector());
+                    if (!mask.test(position)) {
+                        break;
+                    }
+                    editSession.setBlock(position, block);
+                }
+            } catch (MaxChangedBlocksException ignored) {
+            } finally {
+                session.remember(editSession);
+            }
+        } finally {
+            if (bag != null) {
+                bag.flushChanges();
+            }
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean canUse(Actor actor) {
+        return actor.hasPermission("worldedit.tool.stack");
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/extent/TracingExtent.java

@@ -0,0 +1,113 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.extent;
+
+import com.google.common.collect.Multimaps;
+import com.google.common.collect.SetMultimap;
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.entity.BaseEntity;
+import com.sk89q.worldedit.entity.Entity;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.util.collection.BlockMap;
+import com.sk89q.worldedit.world.biome.BiomeType;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.Set;
+import javax.annotation.Nullable;
+
+/**
+ * An extent that can report back if an operation fails due to the extent(s) below it.
+ *
+ * <em>Internal use only.</em>
+ */
+public class TracingExtent extends AbstractDelegateExtent {
+
+    public enum Action {
+        SET_BLOCK,
+        SET_BIOME,
+        CREATE_ENTITY,
+    }
+
+    private final Set<BlockVector3> touchedLocations = Collections.newSetFromMap(BlockMap.create());
+    private final SetMultimap<BlockVector3, Action> failedActions = Multimaps.newSetMultimap(
+            BlockMap.create(), () -> EnumSet.noneOf(Action.class)
+    );
+
+    /**
+     * Create a new instance.
+     *
+     * @param extent the extent
+     */
+    public TracingExtent(Extent extent) {
+        super(extent);
+    }
+
+    public boolean isActive() {
+        return !touchedLocations.isEmpty();
+    }
+
+    public Set<BlockVector3> getTouchedLocations() {
+        return Collections.unmodifiableSet(touchedLocations);
+    }
+
+    public SetMultimap<BlockVector3, Action> getFailedActions() {
+        return Multimaps.unmodifiableSetMultimap(failedActions);
+    }
+
+    @Override
+    public <T extends BlockStateHolder<T>> boolean setBlock(BlockVector3 location, T block) throws WorldEditException {
+        touchedLocations.add(location);
+        boolean result = super.setBlock(location, block);
+        if (!result) {
+            failedActions.put(location, Action.SET_BLOCK);
+        }
+        return result;
+    }
+
+    @Override
+    public boolean setBiome(BlockVector3 position, BiomeType biome) {
+        touchedLocations.add(position);
+        boolean result = super.setBiome(position, biome);
+        if (!result) {
+            failedActions.put(position, Action.SET_BIOME);
+        }
+        return result;
+    }
+
+    @Nullable
+    @Override
+    public Entity createEntity(Location location, BaseEntity entity) {
+        BlockVector3 blockVector3 = location.toVector().toBlockPoint();
+        touchedLocations.add(blockVector3);
+        Entity result = super.createEntity(location, entity);
+        if (result == null) {
+            failedActions.put(blockVector3, Action.CREATE_ENTITY);
+        }
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "TracingExtent{delegate=" + getExtent() + "}";
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/extent/clipboard/io/SpongeSchematicReader.java

@@ -39,7 +39,7 @@ import com.sk89q.worldedit.extension.platform.Capability;
 import com.sk89q.worldedit.extension.platform.Platform;
 import com.sk89q.worldedit.extent.clipboard.BlockArrayClipboard;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
-import com.sk89q.worldedit.math.BlockVector2;
+import com.sk89q.worldedit.internal.Constants;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.CuboidRegion;
 import com.sk89q.worldedit.regions.Region;
@@ -97,7 +97,7 @@ public class SpongeSchematicReader extends NBTSchematicReader {
         int liveDataVersion = platform.getDataVersion();
 
         if (schematicVersion == 1) {
-            dataVersion = 1631; // this is a relatively safe assumption unless someone imports a schematic from 1.12, e.g. sponge 7.1-
+            dataVersion = Constants.DATA_VERSION_MC_1_13_2; // this is a relatively safe assumption unless someone imports a schematic from 1.12, e.g. sponge 7.1-
             fixer = platform.getDataFixer();
             return readVersion1(schematicTag);
         } else if (schematicVersion == 2) {
@@ -128,7 +128,7 @@ public class SpongeSchematicReader extends NBTSchematicReader {
             CompoundTag schematicTag = getBaseTag();
             Map<String, Tag> schematic = schematicTag.getValue();
             if (schematicVersion == 1) {
-                return OptionalInt.of(1631);
+                return OptionalInt.of(Constants.DATA_VERSION_MC_1_13_2);
             } else if (schematicVersion == 2) {
                 return OptionalInt.of(requireTag(schematic, "DataVersion", IntTag.class).getValue());
             }
@@ -322,7 +322,7 @@ public class SpongeSchematicReader extends NBTSchematicReader {
             BiomeType biome = BiomeTypes.get(key);
             if (biome == null) {
                 log.warn("Unknown biome type :" + key +
-                        " in palette. Are you missing a mod or using a schematic made in a newer version of Minecraft?");
+                             " in palette. Are you missing a mod or using a schematic made in a newer version of Minecraft?");
             }
             Tag idTag = palettePart.getValue();
             if (!(idTag instanceof IntTag)) {
@@ -338,7 +338,7 @@ public class SpongeSchematicReader extends NBTSchematicReader {
         int biomeJ = 0;
         int bVal;
         int varIntLength;
-        BlockVector2 min = clipboard.getMinimumPoint().toBlockVector2();
+        BlockVector3 min = clipboard.getMinimumPoint();
         while (biomeJ < biomes.length) {
             bVal = 0;
             varIntLength = 0;
@@ -357,7 +357,9 @@ public class SpongeSchematicReader extends NBTSchematicReader {
             int z = biomeIndex / width;
             int x = biomeIndex % width;
             BiomeType type = palette.get(bVal);
-            clipboard.setBiome(min.add(x, z), type);
+            for (int y = 0; y < clipboard.getRegion().getHeight(); y++) {
+                clipboard.setBiome(min.add(x, y, z), type);
+            }
             biomeIndex++;
         }
     }

worldedit-core/src/main/java/com/sk89q/worldedit/function/block/SnowSimulator.java

@@ -0,0 +1,124 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function.block;
+
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.LayerFunction;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.registry.state.Property;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockTypes;
+
+public class SnowSimulator implements LayerFunction {
+
+    private final BlockState ice = BlockTypes.ICE.getDefaultState();
+    private final BlockState snow = BlockTypes.SNOW.getDefaultState();
+    private final BlockState snowBlock = BlockTypes.SNOW_BLOCK.getDefaultState();
+
+    private final Property<Integer> snowLayersProperty = BlockTypes.SNOW.getProperty("layers");
+    private final Property<Integer> waterLevelProperty = BlockTypes.WATER.getProperty("level");
+
+    private final Extent extent;
+    private final boolean stack;
+
+    private int affected;
+
+    public SnowSimulator(Extent extent, boolean stack) {
+        this.extent = extent;
+        this.stack = stack;
+
+        this.affected = 0;
+    }
+
+    public int getAffected() {
+        return this.affected;
+    }
+
+    @Override
+    public boolean isGround(BlockVector3 position) {
+        BlockState block = this.extent.getBlock(position);
+
+        // We're returning the first block we can place *on top of*
+        if (block.getBlockType().getMaterial().isAir() || (stack && block.getBlockType() == BlockTypes.SNOW)) {
+            return false;
+        }
+
+        // Unless it's water
+        if (block.getBlockType() == BlockTypes.WATER) {
+            return true;
+        }
+
+        // Can only place on full solid blocks
+        return block.getBlockType().getMaterial().isFullCube()
+                && block.getBlockType().getMaterial().isSolid();
+    }
+
+    @Override
+    public boolean apply(BlockVector3 position, int depth) throws WorldEditException {
+        if (depth > 0) {
+            // We only care about the first layer.
+            return false;
+        }
+
+        BlockState block = this.extent.getBlock(position);
+
+        if (block.getBlockType() == BlockTypes.WATER) {
+            if (block.getState(waterLevelProperty) == 0) {
+                if (this.extent.setBlock(position, ice)) {
+                    affected++;
+                }
+            }
+            return false;
+        }
+
+        // Can't put snow this far up
+        if (position.getBlockY() == this.extent.getMaximumPoint().getBlockY()) {
+            return false;
+        }
+
+        BlockVector3 abovePosition = position.add(0, 1, 0);
+        BlockState above = this.extent.getBlock(abovePosition);
+
+        // Can only replace air (or snow in stack mode)
+        if (!above.getBlockType().getMaterial().isAir() && (!stack || above.getBlockType() != BlockTypes.SNOW)) {
+            return false;
+        }
+
+        if (stack && above.getBlockType() == BlockTypes.SNOW) {
+            int currentHeight = above.getState(snowLayersProperty);
+            // We've hit the highest layer (If it doesn't contain current + 2 it means it's 1 away from full)
+            if (!snowLayersProperty.getValues().contains(currentHeight + 2)) {
+                if (this.extent.setBlock(abovePosition, snowBlock)) {
+                    this.affected++;
+                }
+            } else {
+                if (this.extent.setBlock(abovePosition, above.with(snowLayersProperty, currentHeight + 1))) {
+                    this.affected++;
+                }
+            }
+            return false;
+        }
+        if (this.extent.setBlock(abovePosition, snow)) {
+            this.affected++;
+        }
+        return false;
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/function/factory/ApplyLayer.java

@@ -0,0 +1,65 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function.factory;
+
+import com.sk89q.worldedit.function.Contextual;
+import com.sk89q.worldedit.function.EditContext;
+import com.sk89q.worldedit.function.LayerFunction;
+import com.sk89q.worldedit.function.operation.Operation;
+import com.sk89q.worldedit.function.visitor.LayerVisitor;
+import com.sk89q.worldedit.regions.FlatRegion;
+import com.sk89q.worldedit.regions.NullRegion;
+import com.sk89q.worldedit.regions.Regions;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.sk89q.worldedit.util.GuavaUtil.firstNonNull;
+
+public class ApplyLayer implements Contextual<Operation> {
+
+    private final FlatRegion region;
+    private final Contextual<? extends LayerFunction> function;
+
+    public ApplyLayer(Contextual<? extends LayerFunction> function) {
+        this(Regions.asFlatRegion(new NullRegion()), function);
+    }
+
+    public ApplyLayer(FlatRegion region, Contextual<? extends LayerFunction> function) {
+        checkNotNull(region, "region");
+        checkNotNull(function, "function");
+        this.region = region;
+        this.function = function;
+    }
+
+    @Override
+    public Operation createFromContext(EditContext context) {
+        FlatRegion localRegion = Regions.asFlatRegion(firstNonNull(context.getRegion(), region));
+
+        return new LayerVisitor(localRegion,
+            localRegion.getMinimumPoint().getY(),
+            localRegion.getMaximumPoint().getY(),
+            function.createFromContext(context));
+    }
+
+    @Override
+    public String toString() {
+        return "set " + function;
+    }
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/function/factory/ApplyRegion.java

@@ -0,0 +1,59 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function.factory;
+
+import com.sk89q.worldedit.function.Contextual;
+import com.sk89q.worldedit.function.EditContext;
+import com.sk89q.worldedit.function.RegionFunction;
+import com.sk89q.worldedit.function.operation.Operation;
+import com.sk89q.worldedit.function.visitor.RegionVisitor;
+import com.sk89q.worldedit.regions.NullRegion;
+import com.sk89q.worldedit.regions.Region;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.sk89q.worldedit.util.GuavaUtil.firstNonNull;
+
+public class ApplyRegion implements Contextual<Operation> {
+
+    private final Region region;
+    private final Contextual<? extends RegionFunction> function;
+
+    public ApplyRegion(Contextual<? extends RegionFunction> function) {
+        this(new NullRegion(), function);
+    }
+
+    public ApplyRegion(Region region, Contextual<? extends RegionFunction> function) {
+        checkNotNull(region, "region");
+        checkNotNull(function, "function");
+        this.region = region;
+        this.function = function;
+    }
+
+    @Override
+    public Operation createFromContext(EditContext context) {
+        return new RegionVisitor(firstNonNull(context.getRegion(), region), function.createFromContext(context));
+    }
+
+    @Override
+    public String toString() {
+        return "set " + function;
+    }
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/function/factory/Snow.java

@@ -0,0 +1,44 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function.factory;
+
+import com.sk89q.worldedit.function.Contextual;
+import com.sk89q.worldedit.function.EditContext;
+import com.sk89q.worldedit.function.LayerFunction;
+import com.sk89q.worldedit.function.block.SnowSimulator;
+
+public class Snow implements Contextual<LayerFunction> {
+
+    private final boolean stack;
+
+    public Snow(boolean stack) {
+        this.stack = stack;
+    }
+
+    @Override
+    public LayerFunction createFromContext(EditContext context) {
+        return new SnowSimulator(context.getDestination(), this.stack);
+    }
+
+    @Override
+    public String toString() {
+        return "snow" + (this.stack ? " stacker" : "");
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/history/change/BiomeChange3D.java

@@ -0,0 +1,96 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.history.change;
+
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.history.UndoContext;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.world.biome.BiomeType;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Represents a biome change that may be undone or replayed.
+ *
+ * <p>This biome change does not have an {@link Extent} assigned to it because
+ * one will be taken from the passed {@link UndoContext}. If the context
+ * does not have an extent (it is null), cryptic errors may occur.</p>
+ */
+public class BiomeChange3D implements Change {
+
+    private final BlockVector3 position;
+    private final BiomeType previous;
+    private final BiomeType current;
+
+    /**
+     * Create a new biome change.
+     *
+     * @param position the position
+     * @param previous the previous biome
+     * @param current the current biome
+     */
+    public BiomeChange3D(BlockVector3 position, BiomeType previous, BiomeType current) {
+        checkNotNull(position);
+        checkNotNull(previous);
+        checkNotNull(current);
+        this.position = position;
+        this.previous = previous;
+        this.current = current;
+    }
+
+    /**
+     * Get the position.
+     *
+     * @return the position
+     */
+    public BlockVector3 getPosition() {
+        return position;
+    }
+
+    /**
+     * Get the previous biome.
+     *
+     * @return the previous biome
+     */
+    public BiomeType getPrevious() {
+        return previous;
+    }
+
+    /**
+     * Get the current biome.
+     *
+     * @return the current biome
+     */
+    public BiomeType getCurrent() {
+        return current;
+    }
+
+    @Override
+    public void undo(UndoContext context) throws WorldEditException {
+        checkNotNull(context.getExtent()).setBiome(position, previous);
+    }
+
+    @Override
+    public void redo(UndoContext context) throws WorldEditException {
+        checkNotNull(context.getExtent()).setBiome(position, current);
+    }
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/internal/annotation/Offset.java

@@ -0,0 +1,38 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.internal.annotation;
+
+import com.sk89q.worldedit.math.BlockVector3;
+import org.enginehub.piston.inject.InjectAnnotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Annotates a {@link BlockVector3} parameter to inject an offset.
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.PARAMETER)
+@InjectAnnotation
+public @interface Offset {
+    String FORWARD = "forward";
+}

worldedit-core/src/main/java/com/sk89q/worldedit/internal/annotation/OptionalArg.java

@@ -0,0 +1,38 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.internal.annotation;
+
+import com.sk89q.worldedit.entity.Player;
+import org.enginehub.piston.inject.InjectAnnotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Annotates a parameter to indicate it as optional. This is really a bit of a hack, used to
+ * get a {@link Player} or {@code null} instead of throwing.
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.PARAMETER)
+@InjectAnnotation
+public @interface OptionalArg {
+}

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

@@ -0,0 +1,102 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world;
+
+import com.google.auto.value.AutoValue;
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.regions.Region;
+
+import java.util.OptionalLong;
+import javax.annotation.Nullable;
+
+/**
+ * Regeneration options for {@link World#regenerate(Region, EditSession, RegenOptions)}.
+ */
+@AutoValue
+public abstract class RegenOptions {
+
+    /**
+     * Creates a new options builder.
+     *
+     * @return the builder
+     */
+    public static Builder builder() {
+        return new AutoValue_RegenOptions.Builder().seed(OptionalLong.empty()).regenBiomes(false);
+    }
+
+    @AutoValue.Builder
+    public abstract static class Builder {
+
+        /**
+         * Sets the seed to regenerate with. Defaults to {@code null}.
+         *
+         * <p>
+         * Use {@code null} to use the world's current seed.
+         * </p>
+         *
+         * @param seed the seed to regenerate with
+         * @return this builder
+         */
+        public final Builder seed(@Nullable Long seed) {
+            return seed(seed == null ? OptionalLong.empty() : OptionalLong.of(seed));
+        }
+
+        // AV doesn't like us using @Nullable Long for some reason
+        abstract Builder seed(OptionalLong seed);
+
+        /**
+         * Turn on or off applying the biomes from the regenerated chunk. Defaults to {@code false}.
+         *
+         * @param regenBiomes {@code true} to apply biomes
+         * @return this builder
+         */
+        public abstract Builder regenBiomes(boolean regenBiomes);
+
+        /**
+         * Build the options object.
+         *
+         * @return the options object
+         */
+        public abstract RegenOptions build();
+
+    }
+
+    RegenOptions() {
+    }
+
+    /**
+     * The seed to regenerate with.
+     *
+     * <p>
+     * {@link OptionalLong#empty()} if the world's original seed should be used.
+     * </p>
+     */
+    public abstract OptionalLong getSeed();
+
+    abstract boolean isRegenBiomes();
+
+    /**
+     * Whether biomes should be regenerated.
+     */
+    public final boolean shouldRegenBiomes() {
+        return isRegenBiomes();
+    }
+
+}

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

@@ -0,0 +1,36 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world;
+
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
+
+/**
+ * Thrown if the world has been unloaded.
+ */
+public class WorldUnloadedException extends WorldEditException {
+
+    /**
+     * Create a new instance.
+     */
+    public WorldUnloadedException() {
+        super(TranslatableComponent.of("worldedit.error.world-unloaded"));
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/world/chunk/AnvilChunk13.java

@@ -41,7 +41,7 @@ import java.util.Map;
 import javax.annotation.Nullable;
 
 /**
- * The chunk format for Minecraft 1.13 and newer
+ * The chunk format for Minecraft 1.13 to 1.15
  */
 public class AnvilChunk13 implements Chunk {
 
@@ -112,44 +112,48 @@ public class AnvilChunk13 implements Chunk {
                 }
                 palette[paletteEntryId] = blockState;
             }
-            int paletteBits = 4;
-            while ((1 << paletteBits) < paletteSize) {
-                ++paletteBits;
-            }
-            int paletteMask = (1 << paletteBits) - 1;
 
             // parse block states
             long[] blockStatesSerialized = NBTUtils.getChildTag(sectionTag.getValue(), "BlockStates", LongArrayTag.class).getValue();
 
-            int blocksPerChunkSection = 16 * 16 * 16;
+            BlockState[] chunkSectionBlocks = new BlockState[16 * 16 * 16];
-            BlockState[] chunkSectionBlocks = new BlockState[blocksPerChunkSection];
             blocks[y] = chunkSectionBlocks;
 
-            long currentSerializedValue = 0;
+            readBlockStates(palette, blockStatesSerialized, chunkSectionBlocks);
-            int nextSerializedItem = 0;
+        }
-            int remainingBits = 0;
+    }
-            for (int blockPos = 0; blockPos < blocksPerChunkSection; blockPos++) {
+
-                int localBlockId;
+    protected void readBlockStates(BlockState[] palette, long[] blockStatesSerialized, BlockState[] chunkSectionBlocks) throws InvalidFormatException {
-                if (remainingBits < paletteBits) {
+        int paletteBits = 4;
-                    int bitsNextLong = paletteBits - remainingBits;
+        while ((1 << paletteBits) < palette.length) {
-                    localBlockId = (int) currentSerializedValue;
+            ++paletteBits;
-                    if (nextSerializedItem >= blockStatesSerialized.length) {
+        }
-                        throw new InvalidFormatException("Too short block state table");
+        int paletteMask = (1 << paletteBits) - 1;
-                    }
+
-                    currentSerializedValue = blockStatesSerialized[nextSerializedItem++];
+        long currentSerializedValue = 0;
-                    localBlockId |= (currentSerializedValue & ((1 << bitsNextLong) - 1)) << remainingBits;
+        int nextSerializedItem = 0;
-                    currentSerializedValue >>>= bitsNextLong;
+        int remainingBits = 0;
-                    remainingBits = 64 - bitsNextLong;
+        for (int blockPos = 0; blockPos < chunkSectionBlocks.length; blockPos++) {
-                } else {
+            int localBlockId;
-                    localBlockId = (int) (currentSerializedValue & paletteMask);
+            if (remainingBits < paletteBits) {
-                    currentSerializedValue >>>= paletteBits;
+                int bitsNextLong = paletteBits - remainingBits;
-                    remainingBits -= paletteBits;
+                localBlockId = (int) currentSerializedValue;
+                if (nextSerializedItem >= blockStatesSerialized.length) {
+                    throw new InvalidFormatException("Too short block state table");
                 }
-                if (localBlockId >= palette.length) {
+                currentSerializedValue = blockStatesSerialized[nextSerializedItem++];
-                    throw new InvalidFormatException("Invalid block state table entry: " + localBlockId);
+                localBlockId |= (currentSerializedValue & ((1 << bitsNextLong) - 1)) << remainingBits;
-                }
+                currentSerializedValue >>>= bitsNextLong;
-                chunkSectionBlocks[blockPos] = palette[localBlockId];
+                remainingBits = 64 - bitsNextLong;
+            } else {
+                localBlockId = (int) (currentSerializedValue & paletteMask);
+                currentSerializedValue >>>= paletteBits;
+                remainingBits -= paletteBits;
             }
+            if (localBlockId >= palette.length) {
+                throw new InvalidFormatException("Invalid block state table entry: " + localBlockId);
+            }
+            chunkSectionBlocks[blockPos] = palette[localBlockId];
         }
     }
 

worldedit-core/src/main/java/com/sk89q/worldedit/world/chunk/AnvilChunk16.java

@@ -0,0 +1,53 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world.chunk;
+
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.worldedit.world.DataException;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.storage.InvalidFormatException;
+
+/**
+ * The chunk format for Minecraft 1.16 and newer
+ */
+public class AnvilChunk16 extends AnvilChunk13 {
+
+    /**
+     * Construct the chunk with a compound tag.
+     *
+     * @param tag the tag to read
+     * @throws DataException on a data error
+     */
+    public AnvilChunk16(CompoundTag tag) throws DataException {
+        super(tag);
+    }
+
+    @Override
+    protected void readBlockStates(BlockState[] palette, long[] blockStatesSerialized, BlockState[] chunkSectionBlocks) throws InvalidFormatException {
+        PackedIntArrayReader reader = new PackedIntArrayReader(blockStatesSerialized);
+        for (int blockPos = 0; blockPos < chunkSectionBlocks.length; blockPos++) {
+            int index = reader.get(blockPos);
+            if (index >= palette.length) {
+                throw new InvalidFormatException("Invalid block state table entry: " + index);
+            }
+            chunkSectionBlocks[blockPos] = palette[index];
+        }
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/world/chunk/PackedIntArrayReader.java

@@ -0,0 +1,66 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world.chunk;
+
+import static com.google.common.base.Preconditions.checkElementIndex;
+
+public class PackedIntArrayReader {
+    private static final int[] FACTORS = new int[64];
+
+    static {
+        FACTORS[0] = -1;
+        for (int i = 2; i <= 64; i++) {
+            FACTORS[i - 1] = (int) (Integer.toUnsignedLong(-1) / i);
+        }
+    }
+
+    private static final int SIZE = 4096;
+
+    private final long[] data;
+    private final int elementBits;
+    private final long maxValue;
+    private final int elementsPerLong;
+    private final int factor;
+
+    public PackedIntArrayReader(long[] data) {
+        this.data = data;
+        this.elementBits = data.length * 64 / 4096;
+        this.maxValue = (1L << elementBits) - 1L;
+        this.elementsPerLong = 64 / elementBits;
+        this.factor = FACTORS[elementsPerLong - 1];
+        int j = (SIZE + this.elementsPerLong - 1) / this.elementsPerLong;
+        if (j != data.length) {
+            throw new IllegalStateException("Invalid packed-int array provided, should be of length " + j);
+        }
+    }
+
+    public int get(int index) {
+        checkElementIndex(index, SIZE);
+        int i = this.adjustIndex(index);
+        long l = this.data[i];
+        int j = (index - i * this.elementsPerLong) * this.elementBits;
+        return (int) (l >> j & this.maxValue);
+    }
+
+    private int adjustIndex(int i) {
+        return (int) ((long) i * factor + factor >> 32);
+    }
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/world/item/ItemTypes.java

@@ -3,18 +3,18 @@
  * 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
+ * This program is free software: you can redistribute it and/or modify
- * under the terms of the GNU Lesser General Public License as published by the
+ * it under the terms of the GNU General Public License as published by
- * Free Software Foundation, either version 3 of the License, or
+ * 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
+ * This program is distributed in the hope that it will be useful,
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * for more details.
+ * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public License
+ * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
 package com.sk89q.worldedit.world.item;

worldedit-core/src/main/java/com/sk89q/worldedit/world/storage/ChunkStoreHelper.java

@@ -25,10 +25,12 @@ import com.sk89q.jnbt.Tag;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.extension.platform.Capability;
 import com.sk89q.worldedit.extension.platform.Platform;
+import com.sk89q.worldedit.internal.Constants;
 import com.sk89q.worldedit.world.DataException;
 import com.sk89q.worldedit.world.DataFixer;
 import com.sk89q.worldedit.world.chunk.AnvilChunk;
 import com.sk89q.worldedit.world.chunk.AnvilChunk13;
+import com.sk89q.worldedit.world.chunk.AnvilChunk16;
 import com.sk89q.worldedit.world.chunk.Chunk;
 import com.sk89q.worldedit.world.chunk.OldChunk;
 
@@ -58,11 +60,6 @@ public class ChunkStoreHelper {
         }
     }
 
-    /**
-     * The DataVersion for Minecraft 1.13
-     */
-    private static final int DATA_VERSION_MC_1_13 = 1519;
-
     /**
      * Convert a chunk NBT tag into a {@link Chunk} implementation.
      *
@@ -94,13 +91,17 @@ public class ChunkStoreHelper {
         if (dataVersion == 0) dataVersion = -1;
         final Platform platform = WorldEdit.getInstance().getPlatformManager().queryCapability(Capability.WORLD_EDITING);
         final int currentDataVersion = platform.getDataVersion();
-        if (tag.getValue().containsKey("Sections") &&  dataVersion < currentDataVersion) { // only fix up MCA format, DFU doesn't support MCR chunks
+        if (tag.getValue().containsKey("Sections") && dataVersion < currentDataVersion) { // only fix up MCA format, DFU doesn't support MCR chunks
             final DataFixer dataFixer = platform.getDataFixer();
             if (dataFixer != null) {
-                return new AnvilChunk13((CompoundTag) dataFixer.fixUp(DataFixer.FixTypes.CHUNK, rootTag, dataVersion).getValue().get("Level"));
+                tag = (CompoundTag) dataFixer.fixUp(DataFixer.FixTypes.CHUNK, rootTag, dataVersion).getValue().get("Level");
+                dataVersion = currentDataVersion;
             }
         }
-        if (dataVersion >= DATA_VERSION_MC_1_13) {
+        if (dataVersion >= Constants.DATA_VERSION_MC_1_16) {
+            return new AnvilChunk16(tag);
+        }
+        if (dataVersion >= Constants.DATA_VERSION_MC_1_13) {
             return new AnvilChunk13(tag);
         }
 

worldedit-core/src/test/java/com/sk89q/worldedit/internal/util/DeprecationUtilTest.java

@@ -0,0 +1,88 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.internal.util;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class DeprecationUtilTest {
+
+    public interface ModifiedApi {
+        @Deprecated
+        default boolean oldApi() {
+            return newApi();
+        }
+
+        @NonAbstractForCompatibility(
+            delegateName = "oldApi",
+            delegateParams = {}
+        )
+        default boolean newApi() {
+            DeprecationUtil.checkDelegatingOverride(getClass());
+            return oldApi();
+        }
+    }
+
+    public static class OldImpl implements ModifiedApi {
+        @SuppressWarnings("deprecation")
+        @Override
+        public boolean oldApi() {
+            return false;
+        }
+    }
+
+    public static class NewImpl implements ModifiedApi {
+        @Override
+        public boolean newApi() {
+            return true;
+        }
+    }
+
+    public static class NewBadImpl implements ModifiedApi {
+    }
+
+    @Test
+    void oldImpl() {
+        assertFalse(new OldImpl().oldApi());
+        assertFalse(new OldImpl().newApi());
+    }
+
+    @Test
+    void newImpl() {
+        assertTrue(new NewImpl().oldApi());
+        assertTrue(new NewImpl().newApi());
+    }
+
+    @Test
+    void newBadImpl() {
+        // regardless of which method is called, the message is the same
+        Exception ex = assertThrows(IllegalStateException.class, new NewBadImpl()::oldApi);
+        assertTrue(ex.getMessage().contains("must override"));
+        assertTrue(ex.getMessage().contains("ModifiedApi.newApi()"));
+
+        ex = assertThrows(IllegalStateException.class, new NewBadImpl()::newApi);
+        assertTrue(ex.getMessage().contains("must override"));
+        assertTrue(ex.getMessage().contains("ModifiedApi.newApi()"));
+    }
+
+}

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/MutableBiomeArray.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 General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import net.minecraft.world.biome.Biome;
+import net.minecraft.world.biome.source.BiomeArray;
+
+/**
+ * Interface over a {@link BiomeArray} as a mutable object.
+ */
+public interface MutableBiomeArray {
+
+    /**
+     * Hook into the given biome array, to allow edits on it.
+     * @param biomeArray the biome array to edit
+     * @return the mutable interface to the biome array
+     */
+    static MutableBiomeArray inject(BiomeArray biomeArray) {
+        // It's Mixin'd
+        return (MutableBiomeArray) biomeArray;
+    }
+
+    void setBiome(int x, int y, int z, Biome biome);
+
+}

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

@@ -0,0 +1,43 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric;
+
+import net.minecraft.server.WorldGenerationProgressListener;
+import net.minecraft.util.math.ChunkPos;
+import net.minecraft.world.chunk.ChunkStatus;
+
+import javax.annotation.Nullable;
+
+// For now, this does nothing, but might be useful later for regen progress communication.
+class WorldEditGenListener implements WorldGenerationProgressListener {
+
+    @Override
+    public void start(ChunkPos spawnPos) {
+    }
+
+    @Override
+    public void setChunkStatus(ChunkPos pos, @Nullable ChunkStatus status) {
+    }
+
+    @Override
+    public void stop() {
+    }
+
+}

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

@@ -0,0 +1,33 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric.internal;
+
+import net.minecraft.resource.ServerResourceManager;
+import net.minecraft.world.World;
+
+import java.nio.file.Path;
+
+public interface ExtendedMinecraftServer {
+
+    Path getStoragePath(World world);
+
+    ServerResourceManager getServerResourceManager();
+
+}

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

@@ -0,0 +1,26 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric.internal;
+
+public interface ExtendedPlayerEntity {
+
+    String getLanguage();
+
+}

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/mixin/AccessorClientSettingsC2SPacket.java

@@ -0,0 +1,32 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric.mixin;
+
+import net.minecraft.network.packet.c2s.play.ClientSettingsC2SPacket;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+@Mixin(ClientSettingsC2SPacket.class)
+public interface AccessorClientSettingsC2SPacket {
+
+    @Accessor
+    String getLanguage();
+
+}

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

@@ -0,0 +1,36 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric.mixin;
+
+import net.minecraft.world.SaveProperties;
+import net.minecraft.world.gen.GeneratorOptions;
+import net.minecraft.world.level.LevelProperties;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Mutable;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+@Mixin(LevelProperties.class)
+public interface AccessorLevelProperties extends SaveProperties {
+
+    @Accessor
+    @Mutable
+    void setGeneratorOptions(GeneratorOptions options);
+
+}

worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/mixin/AccessorServerChunkManager.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 General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric.mixin;
+
+import com.mojang.datafixers.util.Either;
+import net.minecraft.server.world.ChunkHolder;
+import net.minecraft.server.world.ServerChunkManager;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraft.world.chunk.ChunkStatus;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+import java.util.concurrent.CompletableFuture;
+
+@Mixin(ServerChunkManager.class)
+public interface AccessorServerChunkManager {
+
+    @Invoker
+    CompletableFuture<Either<Chunk, ChunkHolder.Unloaded>> callGetChunkFuture(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create);
+
+    @Accessor
+    ServerChunkManager.MainThreadExecutor getMainThreadExecutor();
+
+}

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

@@ -0,0 +1,39 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric.mixin;
+
+import com.sk89q.worldedit.fabric.MutableBiomeArray;
+import com.sk89q.worldedit.internal.util.BiomeMath;
+import net.minecraft.world.biome.Biome;
+import net.minecraft.world.biome.source.BiomeArray;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(BiomeArray.class)
+public abstract class MixinBiomeArray implements MutableBiomeArray {
+
+    @Shadow
+    private Biome[] data;
+
+    @Override
+    public void setBiome(int x, int y, int z, Biome biome) {
+        this.data[BiomeMath.computeBiomeIndex(x, y, z)] = biome;
+    }
+}

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

@@ -0,0 +1,51 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.forge;
+
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.util.io.WorldEditResourceLoader;
+
+import java.io.IOException;
+import java.net.URL;
+
+public class ForgeResourceLoader extends WorldEditResourceLoader  {
+
+    public ForgeResourceLoader(WorldEdit worldEdit) {
+        super(worldEdit);
+    }
+
+    private static URL getResourceForgeHack(String location) throws IOException {
+        try {
+            return new URL("modjar://worldedit/" + location);
+        } catch (Exception e) {
+            throw new IOException("Could not find " + location);
+        }
+    }
+
+    @Override
+    public URL getRootResource(String pathName) throws IOException {
+        URL url = super.getRootResource(pathName);
+        if (url == null) {
+            return getResourceForgeHack(pathName);
+        }
+        return url;
+    }
+
+}

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

@@ -0,0 +1,44 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.forge;
+
+import net.minecraft.util.math.ChunkPos;
+import net.minecraft.world.chunk.ChunkStatus;
+import net.minecraft.world.chunk.listener.IChunkStatusListener;
+
+import javax.annotation.Nullable;
+
+// For now, this does nothing, but might be useful later for regen progress communication.
+class WorldEditGenListener implements IChunkStatusListener {
+
+    @Override
+    public void start(ChunkPos spawnPos) {
+    }
+
+    @Override
+    public void statusChanged(ChunkPos chunkPosition, @Nullable ChunkStatus newStatus) {
+
+    }
+
+    @Override
+    public void stop() {
+    }
+
+}