Merge remote-tracking branch 'origin/wip' into 1.15

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

@@ -926,6 +926,16 @@ public class AsyncWorld extends PassthroughExtent implements World {
         return parent.canGenerateStructures();
     }
 
+    @Override
+    public void setHardcore(boolean hardcore) {
+        parent.setHardcore(hardcore);
+    }
+
+    @Override
+    public boolean isHardcore() {
+        return parent.isHardcore();
+    }
+
     @Override
     public long getTicksPerAnimalSpawns() {
         return parent.getTicksPerAnimalSpawns();

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

@@ -4,6 +4,7 @@ import com.boydti.fawe.beta.IQueueExtent;
 import com.boydti.fawe.config.Settings;
 import com.boydti.fawe.object.RegionWrapper;
 import com.boydti.fawe.object.changeset.DiskStorageHistory;
+import com.boydti.fawe.object.changeset.SimpleChangeSetSummary;
 import com.boydti.fawe.object.exception.FaweException;
 import com.boydti.fawe.object.extent.LightingExtent;
 import com.boydti.fawe.regions.FaweMaskManager;
@@ -343,7 +344,7 @@ public class FaweAPI {
         for (File file : files) {
             UUID uuid = UUID.fromString(file.getParentFile().getName());
             DiskStorageHistory dsh = new DiskStorageHistory(world, uuid, Integer.parseInt(file.getName().split("\\.")[0]));
-            DiskStorageHistory.DiskStorageSummary summary = dsh.summarize(boundsPlus, shallow);
+            SimpleChangeSetSummary summary = dsh.summarize(boundsPlus, shallow);
             RegionWrapper region = new RegionWrapper(summary.minX, summary.maxX, summary.minZ, summary.maxZ);
             boolean encompassed = false;
             boolean isIn = false;

worldedit-core/src/main/java/com/boydti/fawe/beta/implementation/processors/ExtentBatchProcessorHolder.java

@@ -1,7 +1,7 @@
 package com.boydti.fawe.beta.implementation.processors;
 
 import com.boydti.fawe.beta.IBatchProcessor;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.sk89q.worldedit.extent.Extent;
 
 public abstract class ExtentBatchProcessorHolder extends BatchProcessorHolder implements Extent {
@@ -12,13 +12,13 @@ public abstract class ExtentBatchProcessorHolder extends BatchProcessorHolder im
     }
 
     @Override
-    public Extent enableHistory(FaweChangeSet changeSet) {
+    public Extent enableHistory(AbstractChangeSet changeSet) {
         return this.addProcessor(changeSet);
     }
 
     @Override
     public Extent disableHistory() {
-        this.remove(FaweChangeSet.class);
+        this.remove(AbstractChangeSet.class);
         return this;
     }
 }

worldedit-core/src/main/java/com/boydti/fawe/beta/implementation/processors/LimitExtent.java

@@ -2,10 +2,8 @@ package com.boydti.fawe.beta.implementation.processors;
 
 import com.boydti.fawe.FaweCache;
 import com.boydti.fawe.beta.Filter;
-import com.boydti.fawe.beta.IBatchProcessor;
 import com.boydti.fawe.beta.implementation.filter.block.ExtentFilterBlock;
 import com.boydti.fawe.object.FaweLimit;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
 import com.boydti.fawe.object.exception.FaweException;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.MaxChangedBlocksException;
@@ -14,11 +12,9 @@ import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.extent.PassthroughExtent;
-import com.sk89q.worldedit.extent.clipboard.BlockArrayClipboard;
 import com.sk89q.worldedit.function.generator.GenBase;
 import com.sk89q.worldedit.function.generator.Resource;
 import com.sk89q.worldedit.function.mask.Mask;
-import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.function.pattern.Pattern;
 import com.sk89q.worldedit.math.BlockVector2;
 import com.sk89q.worldedit.math.BlockVector3;

worldedit-core/src/main/java/com/boydti/fawe/beta/implementation/queue/ParallelQueueExtent.java

@@ -9,13 +9,12 @@ import com.boydti.fawe.beta.implementation.filter.CountFilter;
 import com.boydti.fawe.beta.implementation.filter.DistrFilter;
 import com.boydti.fawe.beta.implementation.processors.BatchProcessorHolder;
 import com.boydti.fawe.config.Settings;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.boydti.fawe.object.clipboard.WorldCopyClipboard;
 import com.boydti.fawe.object.extent.NullExtent;
 import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.extent.PassthroughExtent;
-import com.sk89q.worldedit.extent.clipboard.BlockArrayClipboard;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
 import com.sk89q.worldedit.function.mask.BlockMask;
 import com.sk89q.worldedit.function.mask.ExistingBlockMask;
@@ -79,7 +78,7 @@ public class ParallelQueueExtent extends PassthroughExtent implements IQueueWrap
     }
 
     @Override
-    public Extent enableHistory(FaweChangeSet changeSet) {
+    public Extent enableHistory(AbstractChangeSet changeSet) {
         return super.enableHistory(changeSet);
     }
 

worldedit-core/src/main/java/com/boydti/fawe/logging/LoggingChangeSet.java

@@ -1,7 +1,7 @@
 package com.boydti.fawe.logging;
 
 import com.boydti.fawe.object.changeset.AbstractDelegateChangeSet;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.sk89q.worldedit.entity.Player;
 //import org.primesoft.blockshub.IBlocksHubApi;
 //import org.primesoft.blockshub.api.IPlayer;
@@ -11,7 +11,7 @@ public class LoggingChangeSet extends AbstractDelegateChangeSet {
 
     private static boolean initialized = false;
 
-    public static FaweChangeSet wrap(Player player, FaweChangeSet parent) {
+    public static AbstractChangeSet wrap(Player player, AbstractChangeSet parent) {
         if (!initialized) {
             initialized = true;
 //            api = (IBlocksHubApi) Fawe.imp().getBlocksHubApi();
@@ -30,7 +30,7 @@ public class LoggingChangeSet extends AbstractDelegateChangeSet {
 //    private final MutableBlockData oldBlock;
 //    private final MutableBlockData newBlock;
 
-    private LoggingChangeSet(Player player, FaweChangeSet parent) {
+    private LoggingChangeSet(Player player, AbstractChangeSet parent) {
         super(parent);
 //        String world = player.getLocation().world;
 //        try {

worldedit-core/src/main/java/com/boydti/fawe/logging/rollback/RollbackOptimizedHistory.java

@@ -1,10 +1,8 @@
 package com.boydti.fawe.logging.rollback;
 
-import com.boydti.fawe.Fawe;
 import com.boydti.fawe.database.DBHandler;
 import com.boydti.fawe.database.RollbackDatabase;
 import com.boydti.fawe.object.changeset.DiskStorageHistory;
-import com.sk89q.worldedit.math.BlockVector2;
 import com.boydti.fawe.object.changeset.SimpleChangeSetSummary;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.CuboidRegion;
@@ -56,6 +54,7 @@ public class RollbackOptimizedHistory extends DiskStorageHistory {
         this.blockSize = (int) size;
         this.command = command;
         this.closed = true;
+        System.out.println("Size " + size);
     }
 
     public long getTime() {
@@ -63,8 +62,8 @@ public class RollbackOptimizedHistory extends DiskStorageHistory {
     }
 
     @Override
-    protected DiskStorageSummary summarizeShallow() {
+    protected SimpleChangeSetSummary summarizeShallow() {
-        DiskStorageSummary summary = super.summarizeShallow();
+        SimpleChangeSetSummary summary = super.summarizeShallow();
         summary.minX = this.minX;
         summary.minZ = this.minZ;
         summary.maxX = this.maxX;

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

@@ -2,7 +2,7 @@ package com.boydti.fawe.object;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
@@ -25,7 +25,7 @@ import javax.annotation.Nullable;
  */
 public class HistoryExtent extends AbstractDelegateExtent {
 
-    private FaweChangeSet changeSet;
+    private AbstractChangeSet changeSet;
 
     /**
      * Create a new instance.
@@ -33,18 +33,18 @@ public class HistoryExtent extends AbstractDelegateExtent {
      * @param extent    the extent
      * @param changeSet the change set
      */
-    public HistoryExtent(Extent extent, FaweChangeSet changeSet) {
+    public HistoryExtent(Extent extent, AbstractChangeSet changeSet) {
         super(extent);
         checkNotNull(changeSet);
         this.changeSet = changeSet;
     }
 
-    public FaweChangeSet getChangeSet() {
+    public AbstractChangeSet getChangeSet() {
         return changeSet;
     }
 
     @Override
-    public void setChangeSet(FaweChangeSet fcs) {
+    public void setChangeSet(AbstractChangeSet fcs) {
         this.changeSet = fcs;
     }
 

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

@@ -1,6 +1,6 @@
 package com.boydti.fawe.object;
 
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.extent.inventory.BlockBag;
 import com.sk89q.worldedit.history.change.Change;
@@ -9,7 +9,7 @@ import com.sk89q.worldedit.world.biome.BiomeType;
 import java.util.ArrayList;
 import java.util.Iterator;
 
-public class NullChangeSet extends FaweChangeSet {
+public class NullChangeSet extends AbstractChangeSet {
     public NullChangeSet(World world) {
         super(world);
     }

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

@@ -63,10 +63,12 @@ public class InspectBrush extends BrushTool implements DoubleActionTraceTool {
     public boolean perform(final Player player, LocalSession session, boolean rightClick) {
         if (!session.isToolControlEnabled() || !player.hasPermission("worldedit.tool.inspect")) {
             player.print(Caption.of("", "worldedit.tool.inspect"));
+            System.out.println("No tool control");
             return false;
         }
         if (!Settings.IMP.HISTORY.USE_DATABASE) {
             player.print(Caption.of("fawe.error.setting.disable", ("history.use-database (Import with /history import )")));
+            System.out.println("No db");
             return false;
         }
         try {
@@ -76,14 +78,17 @@ public class InspectBrush extends BrushTool implements DoubleActionTraceTool {
             final int z = target.getBlockZ();
             World world = player.getWorld();
             RollbackDatabase db = DBHandler.IMP.getDatabase(world);
+            System.out.println("World " + world.getName());
             int count = 0;
             for (Supplier<RollbackOptimizedHistory> supplier : db.getEdits(target, false)) {
+                System.out.println("History " + db);
                 count++;
                 RollbackOptimizedHistory edit = supplier.get();
                 Iterator<MutableFullBlockChange> iter = edit.getFullBlockIterator(null, 0, false);
                 while (iter.hasNext()) {
                     MutableFullBlockChange change = iter.next();
                     if (change.x != x || change.y != y || change.z != z) {
+                        System.out.println("Not pos " + change.x + "," + change.y + "," + change.z + " | " + x + "," + y + "," + z);
                         continue;
                     }
                     int from = change.from;
@@ -107,7 +112,10 @@ public class InspectBrush extends BrushTool implements DoubleActionTraceTool {
             }
             player.print(Caption.of("fawe.worldedit.tool.tool.inspect.info.footer" , count));
         } catch (IOException e) {
+            System.out.println("IOE");
             throw new RuntimeException(e);
+        } catch (Throwable e) {
+            System.out.println("E throw");
         }
         return true;
     }

worldedit-core/src/main/java/com/boydti/fawe/object/changeset/AbstractDelegateChangeSet.java

@@ -8,6 +8,7 @@ import com.sk89q.worldedit.history.change.BlockChange;
 import com.sk89q.worldedit.history.change.Change;
 import com.sk89q.worldedit.history.change.EntityCreate;
 import com.sk89q.worldedit.history.change.EntityRemove;
+import com.sk89q.worldedit.history.changeset.ChangeSetSummary;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.world.World;
@@ -16,13 +17,12 @@ import com.sk89q.worldedit.world.block.BaseBlock;
 
 import java.io.IOException;
 import java.util.Iterator;
-import java.util.UUID;
 import java.util.concurrent.Future;
 
-public class AbstractDelegateChangeSet extends FaweChangeSet {
+public class AbstractDelegateChangeSet extends AbstractChangeSet {
-    public final FaweChangeSet parent;
+    public final AbstractChangeSet parent;
 
-    public AbstractDelegateChangeSet(FaweChangeSet parent) {
+    public AbstractDelegateChangeSet(AbstractChangeSet parent) {
         super(parent.getWorld());
         this.parent = parent;
         this.waitingCombined = parent.waitingCombined;
@@ -44,7 +44,7 @@ public class AbstractDelegateChangeSet extends FaweChangeSet {
         parent.close();
     }
 
-    public final FaweChangeSet getParent() {
+    public final AbstractChangeSet getParent() {
         return parent;
     }
 
@@ -118,6 +118,11 @@ public class AbstractDelegateChangeSet extends FaweChangeSet {
         parent.delete();
     }
 
+    @Override
+    public ChangeSetSummary summarize(Region region, boolean shallow) {
+        return parent.summarize(region, shallow);
+    }
+
     @Override
     public EditSession toEditSession(Player player) {
         return parent.toEditSession(player);

worldedit-core/src/main/java/com/boydti/fawe/object/changeset/BlockBagChangeSet.java

@@ -1,7 +1,6 @@
 package com.boydti.fawe.object.changeset;
 
 import com.boydti.fawe.FaweCache;
-import com.boydti.fawe.object.exception.FaweException;
 import com.boydti.fawe.util.ReflectionUtils;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.Tag;
@@ -24,7 +23,7 @@ public class BlockBagChangeSet extends AbstractDelegateChangeSet {
     private int[] missingBlocks = new int[BlockTypes.size()];
     private BlockBag blockBag;
 
-    public BlockBagChangeSet(FaweChangeSet parent, BlockBag blockBag, boolean mine) {
+    public BlockBagChangeSet(AbstractChangeSet parent, BlockBag blockBag, boolean mine) {
         super(parent);
         this.blockBag = blockBag;
         this.mine = mine;

worldedit-core/src/main/java/com/boydti/fawe/object/changeset/CFIChangeSet.java

@@ -7,14 +7,19 @@ import com.boydti.fawe.object.change.CFIChange;
 import com.boydti.fawe.util.MainUtil;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.history.change.Change;
+import com.sk89q.worldedit.history.changeset.ChangeSetSummary;
+import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.world.biome.BiomeType;
+import com.sk89q.worldedit.world.block.BlockState;
+
 import java.io.File;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.Iterator;
+import java.util.Map;
 import java.util.UUID;
 
-public class CFIChangeSet extends FaweChangeSet {
+public class CFIChangeSet extends AbstractChangeSet {
 
     private final File file;
 

worldedit-core/src/main/java/com/boydti/fawe/object/changeset/DiskStorageHistory.java

@@ -7,30 +7,20 @@ import com.boydti.fawe.database.RollbackDatabase;
 import com.boydti.fawe.object.FaweInputStream;
 import com.boydti.fawe.object.FaweOutputStream;
 import com.boydti.fawe.object.IntegerPair;
-import com.boydti.fawe.object.RegionWrapper;
 import com.boydti.fawe.object.change.MutableFullBlockChange;
 import com.boydti.fawe.util.MainUtil;
 import com.sk89q.jnbt.NBTInputStream;
 import com.sk89q.jnbt.NBTOutputStream;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.entity.Player;
-import com.sk89q.worldedit.regions.CuboidRegion;
 import com.sk89q.worldedit.regions.Region;
-import com.sk89q.worldedit.util.Countable;
 import com.sk89q.worldedit.world.World;
-import com.sk89q.worldedit.world.block.BlockState;
-import com.sk89q.worldedit.world.block.BlockTypes;
-import com.sk89q.worldedit.world.block.BlockTypesCache;
 
 import java.io.EOFException;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 import java.util.UUID;
 
 /**
@@ -434,79 +424,6 @@ public class DiskStorageHistory extends FaweStreamChangeSet {
         return new IntegerPair(ox, oz);
     }
 
-    public static class DiskStorageSummary {
-
-        public int[] blocks;
-
-        public int minX;
-        public int minZ;
-
-        public int maxX;
-        public int maxZ;
-
-        public DiskStorageSummary(int x, int z) {
-            blocks = new int[BlockTypesCache.states.length];
-            minX = x;
-            maxX = x;
-            minZ = z;
-            maxZ = z;
-        }
-
-        public void add(int x, int z, int id) {
-            blocks[id]++;
-            if (x < minX) {
-                minX = x;
-            } else if (x > maxX) {
-                maxX = x;
-            }
-            if (z < minZ) {
-                minZ = z;
-            } else if (z > maxZ) {
-                maxZ = z;
-            }
-        }
-
-        public Map<BlockState, Integer> getBlocks() {
-            HashMap<BlockState, Integer> map = new HashMap<>();
-            for (int i = 0; i < blocks.length; i++) {
-                if (blocks[i] != 0) {
-                    BlockState state = BlockTypesCache.states[i];
-                    map.put(state, blocks[i]);
-                }
-            }
-            return map;
-        }
-
-        public List<Countable<BlockState>> getBlockDistributionWithData() {
-            ArrayList<Countable<BlockState>> list = new ArrayList<>();
-            for (Map.Entry<BlockState, Integer> entry : getBlocks().entrySet()) {
-                list.add(new Countable<>(entry.getKey(), entry.getValue()));
-            }
-            return list;
-        }
-
-        public Map<BlockState, Double> getPercents() {
-            Map<BlockState, Integer> map = getBlocks();
-            int count = getSize();
-            Map<BlockState, Double> newMap = new HashMap<>();
-            for (Map.Entry<BlockState, Integer> entry : map.entrySet()) {
-                BlockState id = entry.getKey();
-                int changes = entry.getValue();
-                double percent = (changes * 1000L / count) / 10d;
-                newMap.put(id, percent);
-            }
-            return newMap;
-        }
-
-        public int getSize() {
-            int count = 0;
-            for (int block : blocks) {
-                count += block;
-            }
-            return count;
-        }
-    }
-
     @Override
     public boolean isRecordingChanges() {
         // TODO Auto-generated method stub

worldedit-core/src/main/java/com/boydti/fawe/object/changeset/FaweStreamChangeSet.java

@@ -28,7 +28,7 @@ import java.util.Collections;
 import java.util.Iterator;
 import java.util.NoSuchElementException;
 
-public abstract class FaweStreamChangeSet extends FaweChangeSet {
+public abstract class FaweStreamChangeSet extends AbstractChangeSet {
 
     public static final int HEADER_SIZE = 9;
     private int mode;

worldedit-core/src/main/java/com/boydti/fawe/object/changeset/SimpleChangeSetSummary.java

@@ -0,0 +1,69 @@
+package com.boydti.fawe.object.changeset;
+
+import com.sk89q.worldedit.history.changeset.ChangeSetSummary;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class SimpleChangeSetSummary implements ChangeSetSummary {
+    public int[] blocks;
+
+    public int minX;
+    public int minZ;
+
+    public int maxX;
+    public int maxZ;
+
+    public SimpleChangeSetSummary() {
+        blocks = new int[BlockTypesCache.states.length];
+        this.minX = Integer.MAX_VALUE;
+        this.minZ = Integer.MAX_VALUE;
+        this.maxX = Integer.MIN_VALUE;
+        this.maxZ = Integer.MIN_VALUE;
+    }
+
+    public SimpleChangeSetSummary(int x, int z) {
+        blocks = new int[BlockTypesCache.states.length];
+        minX = x;
+        maxX = x;
+        minZ = z;
+        maxZ = z;
+    }
+
+    public void add(int x, int z, int id) {
+        blocks[id]++;
+        if (x < minX) {
+            minX = x;
+        } else if (x > maxX) {
+            maxX = x;
+        }
+        if (z < minZ) {
+            minZ = z;
+        } else if (z > maxZ) {
+            maxZ = z;
+        }
+    }
+
+    @Override
+    public Map<BlockState, Integer> getBlocks() {
+        HashMap<BlockState, Integer> map = new HashMap<>();
+        for (int i = 0; i < blocks.length; i++) {
+            if (blocks[i] != 0) {
+                BlockState state = BlockTypesCache.states[i];
+                map.put(state, blocks[i]);
+            }
+        }
+        return map;
+    }
+
+    @Override
+    public int getSize() {
+        int count = 0;
+        for (int block : blocks) {
+            count += block;
+        }
+        return count;
+    }
+}

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

@@ -40,11 +40,13 @@ public class YieldIterable<T> implements Iterable<T>, Consumer<T>, Closeable {
                         buffer = queue.poll(50, TimeUnit.MILLISECONDS);
                         if (buffer == END_MARKER) {
                             interrupted = true;
+                            buffer = null;
                             return false;
                         }
                     }
                 } catch (InterruptedException e) {
                     interrupted = true;
+                    buffer = null;
                 }
                 return buffer != null;
             }

worldedit-core/src/main/java/com/boydti/fawe/util/EditSessionBuilder.java

@@ -21,7 +21,7 @@ import com.boydti.fawe.object.RegionWrapper;
 import com.boydti.fawe.object.brush.visualization.VirtualWorld;
 import com.boydti.fawe.object.changeset.BlockBagChangeSet;
 import com.boydti.fawe.object.changeset.DiskStorageHistory;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.boydti.fawe.object.changeset.MemoryOptimizedHistory;
 import com.boydti.fawe.object.extent.FaweRegionExtent;
 import com.boydti.fawe.object.extent.MultiRegionExtent;
@@ -49,7 +49,7 @@ public class EditSessionBuilder {
     private String worldName;
     private Player player;
     private FaweLimit limit;
-    private FaweChangeSet changeSet;
+    private AbstractChangeSet changeSet;
     private Region[] allowedRegions;
     private Boolean autoQueue;
     private Boolean fastmode;
@@ -116,7 +116,7 @@ public class EditSessionBuilder {
         return setDirty();
     }
 
-    public EditSessionBuilder changeSet(@Nullable FaweChangeSet changeSet) {
+    public EditSessionBuilder changeSet(@Nullable AbstractChangeSet changeSet) {
         this.changeSet = changeSet;
         return setDirty();
     }
@@ -265,7 +265,7 @@ public class EditSessionBuilder {
         return extent;
     }
 
-    private FaweChangeSet changeTask;
+    private AbstractChangeSet changeTask;
     private int maxY;
     private Extent bypassHistory;
     private Extent bypassAll;
@@ -493,7 +493,7 @@ public class EditSessionBuilder {
         return player;
     }
 
-    public FaweChangeSet getChangeTask() {
+    public AbstractChangeSet getChangeTask() {
         return changeTask;
     }
 

worldedit-core/src/main/java/com/boydti/fawe/util/StringMan.java

@@ -58,6 +58,17 @@ public class StringMan {
         return -1;
     }
 
+    public static String humanReadableByteCountBin(long bytes) {
+        long b = bytes == Long.MIN_VALUE ? Long.MAX_VALUE : Math.abs(bytes);
+        return b < 1024L ? bytes + " B"
+                : b <= 0xfffccccccccccccL >> 40 ? String.format("%.1f KiB", bytes / 0x1p10)
+                : b <= 0xfffccccccccccccL >> 30 ? String.format("%.1f MiB", bytes / 0x1p20)
+                : b <= 0xfffccccccccccccL >> 20 ? String.format("%.1f GiB", bytes / 0x1p30)
+                : b <= 0xfffccccccccccccL >> 10 ? String.format("%.1f TiB", bytes / 0x1p40)
+                : b <= 0xfffccccccccccccL ? String.format("%.1f PiB", (bytes >> 10) / 0x1p40)
+                : String.format("%.1f EiB", (bytes >> 20) / 0x1p40);
+    }
+
     public static String prettyFormat(double d) {
         if (d == Double.MIN_VALUE || d == Double.NEGATIVE_INFINITY) return "-∞";
         if (d == Double.MAX_VALUE || d == Double.POSITIVE_INFINITY) return "∞";

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

@@ -32,7 +32,7 @@ import com.boydti.fawe.object.FaweLimit;
 import com.boydti.fawe.object.RegionWrapper;
 import com.boydti.fawe.object.RunnableVal;
 import com.boydti.fawe.object.changeset.BlockBagChangeSet;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.boydti.fawe.object.collection.LocalBlockVectorSet;
 import com.boydti.fawe.object.extent.FaweRegionExtent;
 import com.boydti.fawe.object.extent.ProcessedWEExtent;
@@ -198,7 +198,7 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
     private final FaweLimit originalLimit;
     private final FaweLimit limit;
     private final Player player;
-    private FaweChangeSet changeSet;
+    private AbstractChangeSet changeSet;
     private boolean history;
 
     private final MutableBlockVector3 mutablebv = new MutableBlockVector3();
@@ -212,11 +212,11 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
     private final int maxY;
 
     @Deprecated
-    public EditSession(@NotNull World world, @Nullable Player player, @Nullable FaweLimit limit, @Nullable FaweChangeSet changeSet, @Nullable RegionWrapper[] allowedRegions, @Nullable Boolean autoQueue, @Nullable Boolean fastmode, @Nullable Boolean checkMemory, @Nullable Boolean combineStages, @Nullable BlockBag blockBag, @Nullable EventBus bus, @Nullable EditSessionEvent event) {
+    public EditSession(@NotNull World world, @Nullable Player player, @Nullable FaweLimit limit, @Nullable AbstractChangeSet changeSet, @Nullable RegionWrapper[] allowedRegions, @Nullable Boolean autoQueue, @Nullable Boolean fastmode, @Nullable Boolean checkMemory, @Nullable Boolean combineStages, @Nullable BlockBag blockBag, @Nullable EventBus bus, @Nullable EditSessionEvent event) {
         this(null, world, player, limit, changeSet, allowedRegions, autoQueue, fastmode, checkMemory, combineStages, blockBag, bus, event);
     }
 
-    public EditSession(@Nullable String worldName, @Nullable World world, @Nullable Player player, @Nullable FaweLimit limit, @Nullable FaweChangeSet changeSet, @Nullable Region[] allowedRegions, @Nullable Boolean autoQueue, @Nullable Boolean fastmode, @Nullable Boolean checkMemory, @Nullable Boolean combineStages, @Nullable BlockBag blockBag, @Nullable EventBus bus, @Nullable EditSessionEvent event) {
+    public EditSession(@Nullable String worldName, @Nullable World world, @Nullable Player player, @Nullable FaweLimit limit, @Nullable AbstractChangeSet changeSet, @Nullable Region[] allowedRegions, @Nullable Boolean autoQueue, @Nullable Boolean fastmode, @Nullable Boolean checkMemory, @Nullable Boolean combineStages, @Nullable BlockBag blockBag, @Nullable EventBus bus, @Nullable EditSessionEvent event) {
         this(new EditSessionBuilder(world, worldName).player(player).limit(limit).changeSet(changeSet).allowedRegions(allowedRegions).autoQueue(autoQueue).fastmode(fastmode).checkMemory(checkMemory).combineStages(combineStages).blockBag(blockBag).eventBus(bus).event(event));
     }
 
@@ -393,7 +393,7 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
      * Used internally to set the ChangeSet during completion to record custom changes which aren't normally recorded
      * @param set
      */
-    public void setRawChangeSet(@Nullable FaweChangeSet set) {
+    public void setRawChangeSet(@Nullable AbstractChangeSet set) {
         changeSet = set;
         changes++;
     }
@@ -999,10 +999,10 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
         // Enqueue it
         if (getChangeSet() != null) {
             if (Settings.IMP.HISTORY.COMBINE_STAGES) {
-                ((FaweChangeSet) getChangeSet()).closeAsync();
+                ((AbstractChangeSet) getChangeSet()).closeAsync();
             } else {
                 try {
-                    ((FaweChangeSet) getChangeSet()).close();
+                    ((AbstractChangeSet) getChangeSet()).close();
                 } catch (IOException e) {
                     throw new RuntimeException(e);
                 }
@@ -2794,7 +2794,7 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
 
     public boolean regenerate(Region region, BiomeType biome, Long seed) {
         //TODO Optimize - avoid Vector2D creation (make mutable)
-        final FaweChangeSet fcs = (FaweChangeSet) this.getChangeSet();
+        final AbstractChangeSet fcs = (AbstractChangeSet) this.getChangeSet();
         this.setChangeSet(null);
         final FaweRegionExtent fe = this.getRegionExtent();
         final boolean cuboid = region instanceof CuboidRegion;

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

@@ -28,7 +28,6 @@ import com.boydti.fawe.object.FaweLimit;
 import com.boydti.fawe.object.FaweOutputStream;
 import com.boydti.fawe.object.brush.visualization.VirtualWorld;
 import com.boydti.fawe.object.changeset.DiskStorageHistory;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
 import com.boydti.fawe.object.clipboard.MultiClipboardHolder;
 import com.boydti.fawe.object.collection.SparseBitSet;
 import com.boydti.fawe.object.extent.ResettableExtent;
@@ -39,6 +38,8 @@ import com.boydti.fawe.util.StringMan;
 import com.boydti.fawe.util.TextureHolder;
 import com.boydti.fawe.util.TextureUtil;
 import com.boydti.fawe.wrappers.WorldWrapper;
+import com.google.common.base.Function;
+import com.google.common.collect.Lists;
 import com.sk89q.jchronic.Chronic;
 import com.sk89q.jchronic.Options;
 import com.sk89q.jchronic.utils.Span;
@@ -153,7 +154,7 @@ public class LocalSession implements TextureHolder {
 
     private transient VirtualWorld virtual;
     private transient BlockVector3 cuiTemporaryBlock;
-    private transient List<Countable<BlockState>> lastDistribution;
+    private transient List<Countable> lastDistribution;
     private transient World worldOverride;
     private transient boolean tickingWatchdog = false;
     private transient boolean hasBeenToldVersion;
@@ -332,6 +333,10 @@ public class LocalSession implements TextureHolder {
         return (historyNegativeIndex == null ? historyNegativeIndex = 0 : historyNegativeIndex);
     }
 
+    public List<ChangeSet> getHistory() {
+        return Lists.transform(history, this::getChangeSet);
+    }
+
     public boolean save() {
         saveHistoryNegativeIndex(uuid, currentWorld);
         if (defaultSelector == RegionSelectorType.CUBOID) {
@@ -396,9 +401,9 @@ public class LocalSession implements TextureHolder {
         remember(editSession, true, limit);
     }
 
-    private FaweChangeSet getChangeSet(Object o) {
+    private ChangeSet getChangeSet(Object o) {
-        if (o instanceof FaweChangeSet) {
+        if (o instanceof ChangeSet) {
-            FaweChangeSet cs = (FaweChangeSet) o;
+            ChangeSet cs = (ChangeSet) o;
             try {
                 cs.close();
             } catch (IOException e) {
@@ -428,16 +433,16 @@ public class LocalSession implements TextureHolder {
             return;
         }
         loadSessionHistoryFromDisk(player.getUniqueId(), world);
-        if (changeSet instanceof FaweChangeSet) {
+        if (changeSet instanceof ChangeSet) {
             ListIterator<Object> iter = history.listIterator();
             int i = 0;
             int cutoffIndex = history.size() - getHistoryNegativeIndex();
             while (iter.hasNext()) {
                 Object item = iter.next();
                 if (++i > cutoffIndex) {
-                    FaweChangeSet oldChangeSet;
+                    ChangeSet oldChangeSet;
-                    if (item instanceof FaweChangeSet) {
+                    if (item instanceof ChangeSet) {
-                        oldChangeSet = (FaweChangeSet) item;
+                        oldChangeSet = (ChangeSet) item;
                     } else {
                         oldChangeSet = getChangeSet(item);
                     }
@@ -455,7 +460,7 @@ public class LocalSession implements TextureHolder {
         if (limit != null) {
             int limitMb = limit.MAX_HISTORY;
             while (((!Settings.IMP.HISTORY.USE_DISK && history.size() > MAX_HISTORY_SIZE) || (historySize >> 20) > limitMb) && history.size() > 1) {
-                FaweChangeSet item = (FaweChangeSet) history.remove(0);
+                ChangeSet item = (ChangeSet) history.remove(0);
                 item.delete();
                 long size = MainUtil.getSize(item);
                 historySize -= size;
@@ -479,7 +484,7 @@ public class LocalSession implements TextureHolder {
         }
         */
 
-        FaweChangeSet changeSet = (FaweChangeSet) editSession.getChangeSet();
+        ChangeSet changeSet = editSession.getChangeSet();
         if (changeSet.isEmpty()) {
             return;
         }
@@ -496,9 +501,9 @@ public class LocalSession implements TextureHolder {
             while (iter.hasNext()) {
                 Object item = iter.next();
                 if (++i > cutoffIndex) {
-                    FaweChangeSet oldChangeSet;
+                    ChangeSet oldChangeSet;
-                    if (item instanceof FaweChangeSet) {
+                    if (item instanceof ChangeSet) {
-                        oldChangeSet = (FaweChangeSet) item;
+                        oldChangeSet = (ChangeSet) item;
                     } else {
                         oldChangeSet = getChangeSet(item);
                     }
@@ -519,7 +524,7 @@ public class LocalSession implements TextureHolder {
             history.add(0, changeSet);
         }
         while (((!Settings.IMP.HISTORY.USE_DISK && history.size() > MAX_HISTORY_SIZE) || (historySize >> 20) > limitMb) && history.size() > 1) {
-            FaweChangeSet item = (FaweChangeSet) history.remove(0);
+            ChangeSet item = (ChangeSet) history.remove(0);
             item.delete();
             long size = MainUtil.getSize(item);
             historySize -= size;
@@ -535,10 +540,11 @@ public class LocalSession implements TextureHolder {
      */
     public EditSession undo(@Nullable BlockBag newBlockBag, Actor actor) {
         checkNotNull(actor);
-        loadSessionHistoryFromDisk(actor.getUniqueId(), ((Player) actor).getWorldForEditing());
+        World world = ((Player) actor).getWorldForEditing();
+        loadSessionHistoryFromDisk(actor.getUniqueId(), world);
         if (getHistoryNegativeIndex() < history.size()) {
-            FaweChangeSet changeSet = getChangeSet(history.get(getHistoryIndex()));
+            ChangeSet changeSet = getChangeSet(history.get(getHistoryIndex()));
-            try (EditSession newEditSession = new EditSessionBuilder(changeSet.getWorld())
+            try (EditSession newEditSession = new EditSessionBuilder(world)
                     .allowedRegionsEverywhere()
                     .checkMemory(false)
                     .changeSetNull()
@@ -571,12 +577,13 @@ public class LocalSession implements TextureHolder {
      */
     public EditSession redo(@Nullable BlockBag newBlockBag, Actor actor) {
         checkNotNull(actor);
-        loadSessionHistoryFromDisk(actor.getUniqueId(), ((Player)actor).getWorldForEditing());
+        World world = ((Player) actor).getWorldForEditing();
+        loadSessionHistoryFromDisk(actor.getUniqueId(), world);
         if (getHistoryNegativeIndex() > 0) {
             setDirty();
             historyNegativeIndex--;
-            FaweChangeSet changeSet = getChangeSet(history.get(getHistoryIndex()));
+            ChangeSet changeSet = getChangeSet(history.get(getHistoryIndex()));
-            try (EditSession newEditSession = new EditSessionBuilder(changeSet.getWorld())
+            try (EditSession newEditSession = new EditSessionBuilder(world)
                     .allowedRegionsEverywhere()
                     .checkMemory(false)
                     .changeSetNull()
@@ -1594,14 +1601,14 @@ public class LocalSession implements TextureHolder {
      *
      * @return block distribution or {@code null}
      */
-    public List<Countable<BlockState>> getLastDistribution() {
+    public List<Countable> getLastDistribution() {
         return lastDistribution == null ? null : Collections.unmodifiableList(lastDistribution);
     }
 
     /**
      * Store a block distribution in this session.
      */
-    public void setLastDistribution(List<Countable<BlockState>> dist) {
+    public void setLastDistribution(List<Countable> dist) {
         lastDistribution = dist;
     }
 

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

@@ -12,6 +12,7 @@ import com.boydti.fawe.logging.rollback.RollbackOptimizedHistory;
 import com.boydti.fawe.object.RegionWrapper;
 import com.boydti.fawe.object.changeset.SimpleChangeSetSummary;
 import com.boydti.fawe.util.MainUtil;
+import com.boydti.fawe.util.StringMan;
 import com.google.common.base.Function;
 import com.google.common.collect.Lists;
 import com.sk89q.worldedit.LocalSession;
@@ -22,6 +23,8 @@ import com.sk89q.worldedit.command.util.CommandPermissionsConditionGenerator;
 import com.sk89q.worldedit.command.util.annotation.Confirm;
 import com.sk89q.worldedit.entity.Player;
 import com.sk89q.worldedit.extension.platform.Actor;
+import com.sk89q.worldedit.history.change.Change;
+import com.sk89q.worldedit.history.changeset.ChangeSet;
 import com.sk89q.worldedit.internal.annotation.AllowedRegion;
 import com.sk89q.worldedit.internal.annotation.Time;
 import com.sk89q.worldedit.math.BlockVector2;
@@ -32,6 +35,7 @@ import com.sk89q.worldedit.util.Direction;
 import com.sk89q.worldedit.util.Identifiable;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.util.formatting.component.PaginationBox;
+import com.sk89q.worldedit.util.formatting.component.TextComponentProducer;
 import com.sk89q.worldedit.util.formatting.text.Component;
 import com.sk89q.worldedit.util.formatting.text.TextComponent;
 import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
@@ -46,7 +50,6 @@ import java.util.List;
 import java.util.Objects;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
-import java.util.concurrent.atomic.LongAdder;
 import java.util.function.Supplier;
 import javax.annotation.Nullable;
 import org.enginehub.piston.annotation.Command;
@@ -168,7 +171,7 @@ public class HistorySubCommands {
                                             world, uuid,
                                             Integer.parseInt(
                                                     name.substring(0, name.length() - 3)));
-                                    DiskStorageHistory.DiskStorageSummary summary = rollback
+                                    SimpleChangeSetSummary summary = rollback
                                             .summarize(RegionWrapper.GLOBAL(), false);
                                     if (summary != null) {
                                         rollback.setDimensions(
@@ -194,15 +197,14 @@ public class HistorySubCommands {
     }
 
     @Command(
-            name = "summary",
+            name = "info",
-            aliases = {"info", "summarize"},
+            aliases = {"summary", "summarize"},
             desc = "Summarize an edit"
     )
-    @CommandPermissions("worldedit.history.find")
+    @CommandPermissions("worldedit.history.info")
     public synchronized void summary(Player player, RollbackDatabase database, Arguments arguments,
                                      @Arg(desc = "Player uuid/name") UUID other,
-                                     @Arg(desc = "edit index") Integer index,
+                                     @Arg(desc = "edit index") Integer index) throws WorldEditException, ExecutionException, InterruptedException {
-                                     @ArgFlag(name = 'p', desc = "Page to view.", def = "-1") int page) throws WorldEditException, ExecutionException, InterruptedException {
         RollbackOptimizedHistory edit = database.getEdit(other, index).get();
         if (edit == null) {
             player.print(TranslatableComponent.of("fawe.worldedit.schematic.schematic.none"));
@@ -226,48 +228,72 @@ public class HistorySubCommands {
         String timeStr = MainUtil.secToTime(seconds);
 
         int size = edit.size();
-
-        String pageCommand = "/" + arguments.get().replaceAll("-p [0-9]+", "").trim();
-        List<Countable<BlockState>> list = null;
-        Reference<List<Countable<BlockState>>> cached = player.getMeta(pageCommand);
-        if (cached != null) {
-            list = cached.get();
-        }
-        if (list == null) {
-            DiskStorageHistory.DiskStorageSummary summary = edit.summarize(null, false);
-            if (summary != null) {
-                list = summary.getBlockDistributionWithData();
-                player.setMeta(pageCommand, new SoftReference<>(list));
-            }
-        }
         boolean biomes = edit.getBioFile().exists();
         boolean createdEnts = edit.getEnttFile().exists();
         boolean removedEnts = edit.getEntfFile().exists();
         boolean createdTiles = edit.getNbttFile().exists();
         boolean removedTiles = edit.getNbtfFile().exists();
-        System.out.println("TODO FIXME move to translations");
+
-        if (page == -1) {
+        TranslatableComponent header = Caption.of("fawe.worldedit.history.find.element", name, timeStr, distance, direction.name(), cmd);
-            player.print("name: " + name
+
-                    + ", cmd: " + edit.getCommand()
+        String sizeStr = StringMan.humanReadableByteCountBin(edit.getSizeOnDisk());
-                    + ", dist: " + distance + "m " + direction.name()
+        String extra = "";
-                    + ", time: " + timeStr + " ago"
+        if (biomes) extra += "biomes, ";
-                    + ", size: " + size + " blocks"
+        if (createdEnts) extra += "+entity, ";
-                    + ", biomes: " + biomes
+        if (removedEnts) extra += "-entity, ";
-                    + ", +entity: " + createdEnts
+        if (createdTiles) extra += "+tile, ";
-                    + ", -entity: " + removedEnts
+        if (removedTiles) extra += "-tile, ";
-                    + ", +tile: " + createdTiles
+
-                    + ", -tile: " + removedTiles
+        TranslatableComponent body = Caption.of("fawe.worldedit.history.find.element.more", size, edit.getMinimumPoint(), edit.getMaximumPoint(), extra.trim(), sizeStr);
-                    + ", disk: " + (edit.getSizeOnDisk() / 1000) + "mb"
+        Component distr = TextComponent.of("/history distr").clickEvent(ClickEvent.suggestCommand("//history distr " + other + " " + index));
-                    + ", min " + edit.getMinimumPoint()
+        TextComponentProducer content = new TextComponentProducer().append(header).newline().append(body).newline().append(distr);
-                    + ", max " + edit.getMaximumPoint()
+        player.print(content.create());
-            );
     }
-        page = 1;
+
-        if (list != null) {
+    private PaginationBox list(RollbackDatabase database, String pageCommand, List<Supplier<? extends ChangeSet>> histories, BlockVector3 origin) {
-            SelectionCommands.BlockDistributionResult pages = new SelectionCommands.BlockDistributionResult((List) list, true, pageCommand);
+        return PaginationBox.fromStrings("Edits:", pageCommand, histories, new Function<Supplier<? extends ChangeSet>, Component>() {
-            player.print(pages.create(page));
+            @NotNull
+            @Override
+            public Component apply(@Nullable Supplier<? extends ChangeSet> input) {
+                ChangeSet edit = input.get();
+
+                if (edit instanceof RollbackOptimizedHistory) {
+                    RollbackOptimizedHistory rollback = (RollbackOptimizedHistory) edit;
+
+                    UUID uuid = rollback.getUUID();
+                    int index = rollback.getIndex();
+                    String name = Fawe.imp().getName(rollback.getUUID());
+
+                    String cmd = rollback.getCommand();
+                    BlockVector3 pos1 = rollback.getMinimumPoint();
+                    BlockVector3 pos2 = rollback.getMaximumPoint();
+
+                    double distanceX = Math.min(Math.abs(pos1.getX() - origin.getX()), Math.abs(pos2.getX() - origin.getX()));
+                    double distanceZ = Math.min(Math.abs(pos1.getZ() - origin.getZ()), Math.abs(pos2.getZ() - origin.getZ()));
+                    int distance = (int) Math.sqrt(distanceX * distanceX + distanceZ * distanceZ);
+
+                    BlockVector2 dirVec = BlockVector2.at(rollback.getOriginX() - origin.getX(), rollback.getOriginZ() - origin.getZ());
+                    Direction direction = Direction.findClosest(dirVec.toVector3(), Direction.Flag.ALL);
+
+                    long seconds = (System.currentTimeMillis() - rollback.getBDFile().lastModified()) / 1000;
+                    String timeStr = MainUtil.secToTime(seconds);
+
+                    int size = edit.size();
+
+                    TranslatableComponent elem = Caption.of("fawe.worldedit.history.find.element", name, timeStr, distance, direction.name(), cmd);
+
+                    String infoCmd = "//history summary " + uuid + " " + index;
+                    TranslatableComponent hover = Caption.of("fawe.worldedit.history.find.hover", size);
+                    elem = elem.hoverEvent(HoverEvent.of(HoverEvent.Action.SHOW_TEXT, hover));
+                    elem = elem.clickEvent(ClickEvent.of(ClickEvent.Action.RUN_COMMAND, infoCmd));
+                    return elem;
+                } else {
+                    // TODO
+                    return TextComponent.of("");
                 }
             }
+        });
+    }
 
     @Command(
             name = "find",
@@ -276,28 +302,26 @@ public class HistorySubCommands {
     )
     @CommandPermissions("worldedit.history.find")
     public synchronized void find(Player player, World world, RollbackDatabase database, Arguments arguments,
-                                  @ArgFlag(name = 'u', desc = "String user") UUID other,
+                                  @ArgFlag(name = 'u', def="", desc = "String user") UUID other,
                                   @ArgFlag(name = 'r', def = "0", desc = "radius")
-                                  @Range(from = 0, to = Integer.MAX_VALUE) int radius,
+                                  @Range(from = 0, to = Integer.MAX_VALUE) Integer radius,
                                   @ArgFlag(name = 't', desc = "Time e.g. 20s", def = "0")
-                                  @Time long timeDiff,
+                                  @Time Long timeDiff,
-                                  @ArgFlag(name = 'p', desc = "Page to view.", def = "1") int page) throws WorldEditException {
+                                  @ArgFlag(name = 'p', desc = "Page to view.", def = "") Integer page) throws WorldEditException {
         if (!Settings.IMP.HISTORY.USE_DATABASE) {
             player.print(Caption.of("fawe.error.setting.disable" , "history.use-database (Import with //history import )"));
             return;
         }
+        if (other == null && radius == 0 && timeDiff == 0) throw new InsufficientArgumentsException("User must be provided");
         checkCommandArgument(radius > 0, "Radius must be >= 0");
         checkCommandArgument(timeDiff > 0, "Time must be >= 0");
 
         Location origin = player.getLocation();
         String pageCommand = "/" + arguments.get().replaceAll("-p [0-9]+", "").trim();
+        Reference<List<Supplier<? extends ChangeSet>>> cached = player.getMeta(pageCommand);
+        List<Supplier<? extends ChangeSet>> history = cached == null ? null : cached.get();
 
-        List<Supplier<RollbackOptimizedHistory>> list = null;
+        if (page == null || history == null) {
-        Reference<List<Supplier<RollbackOptimizedHistory>>> cached = player.getMeta(pageCommand);
-        if (cached != null) {
-            list = cached.get();
-        }
-        if (list == null) {
             if (other == null) other = player.getUniqueId();
             if (!other.equals(player.getUniqueId())) {
                 player.checkPermission("worldedit.history.undo.other");
@@ -309,53 +333,62 @@ public class HistorySubCommands {
             bot = bot.clampY(0, world.getMaxY());
             top = top.clampY(0, world.getMaxY());
 
-            LongAdder total = new LongAdder();
-
             long minTime = System.currentTimeMillis() - timeDiff;
             Iterable<Supplier<RollbackOptimizedHistory>> edits = database.getEdits(other, minTime, bot, top, false, false);
-            list = Lists.newArrayList(edits);
+            history = Lists.newArrayList(edits);
-            player.setMeta(pageCommand, new SoftReference<>(list));
+            player.setMeta(pageCommand, new SoftReference<>(history));
+            page = 1;
         }
 
-        PaginationBox pages = PaginationBox.fromStrings("Edits:", pageCommand, list, new Function<Supplier<RollbackOptimizedHistory>, Component>() {
+        PaginationBox box = list(database, pageCommand, history, origin.toBlockPoint());
-            @NotNull
+        player.print(box.create(page));
-            @Override
-            public Component apply(@Nullable Supplier<RollbackOptimizedHistory> input) {
-                RollbackOptimizedHistory edit = input.get();
-                UUID uuid = edit.getUUID();
-                int index = edit.getIndex();
-                if (!edit.isEmpty()) {
-                    database.delete(uuid, index);
-                    return TextComponent.empty();
     }
-                String name = Fawe.imp().getName(edit.getUUID());
 
-                String cmd = edit.getCommand();
+    @Command(
-                BlockVector3 pos1 = edit.getMinimumPoint();
+            name = "distr",
-                BlockVector3 pos2 = edit.getMaximumPoint();
+            aliases = {"distribution"},
-
+            desc = "View block distribution for an edit"
-                double distanceX = Math.min(Math.abs(pos1.getX() - origin.getX()), Math.abs(pos2.getX() - origin.getX()));
+    )
-                double distanceZ = Math.min(Math.abs(pos1.getZ() - origin.getZ()), Math.abs(pos2.getZ() - origin.getZ()));
+    @CommandPermissions("worldedit.history.distr")
-                int distance = (int) Math.sqrt(distanceX * distanceX + distanceZ * distanceZ);
+    public void distr(Player player, LocalSession session, RollbackDatabase database, Arguments arguments,
-
+                      @Arg(desc = "Player uuid/name") UUID other,
-                BlockVector2 dirVec = BlockVector2.at(edit.getOriginX() - origin.getX(), edit.getOriginZ() - origin.getZ());
+                      @Arg(desc = "edit index") Integer index,
-                Direction direction = Direction.findClosest(dirVec.toVector3(), Direction.Flag.ALL);
+                      @ArgFlag(name = 'p', desc = "Page to view.", def = "") Integer page) throws ExecutionException, InterruptedException {
-
+        String pageCommand = "/" + arguments.get().replaceAll("-p [0-9]+", "").trim();
-                long seconds = (System.currentTimeMillis() - edit.getBDFile().lastModified()) / 1000;
+        Reference<PaginationBox> cached = player.getMeta(pageCommand);
-                String timeStr = MainUtil.secToTime(seconds);
+        PaginationBox pages = cached == null ? null : cached.get();
-
+        if (page == null || pages == null) {
-                int size = edit.size();
+            RollbackOptimizedHistory edit = database.getEdit(other, index).get();
-
+            SimpleChangeSetSummary summary = edit.summarize(null, false);
-                TranslatableComponent elem = Caption.of("fawe.worldedit.history.find.element", name, timeStr, distance, direction.name(), cmd);
+            if (summary != null) {
-
+                List<Countable<BlockState>> distr = summary.getBlockDistributionWithData();
-                String infoCmd = "//history summary " + uuid + " " + index;
+                SelectionCommands.BlockDistributionResult distrPages = new SelectionCommands.BlockDistributionResult((List) distr, true, pageCommand);
-                TranslatableComponent hover = Caption.of("fawe.worldedit.history.find.hover", size);
+                pages = new PaginationBox.MergedPaginationBox("Block Distribution", pageCommand, pages, distrPages);
-                elem = elem.hoverEvent(HoverEvent.of(HoverEvent.Action.SHOW_TEXT, hover));
+                player.setMeta(pageCommand, new SoftReference<>(pages));
-                elem = elem.clickEvent(ClickEvent.of(ClickEvent.Action.RUN_COMMAND, infoCmd));
+            }
-
+            page = 1;
-                return elem;
+        }
+        player.print(pages.create(page));
+    }
+
+    @Command(
+            name = "list",
+            desc = "List your history"
+    )
+    @CommandPermissions("worldedit.history.list")
+    public void list(Player player, LocalSession session, RollbackDatabase database, Arguments arguments,
+                     @Arg(desc = "Player uuid/name") UUID other,
+                     @ArgFlag(name = 'p', desc = "Page to view.", def = "") Integer page) {
+        int index = session.getHistoryIndex();
+        List<Supplier<? extends ChangeSet>> history = Lists.transform(session.getHistory(), (Function<ChangeSet, Supplier<ChangeSet>>) input -> () -> input);
+        Location origin = player.getLocation();
+        String pageCommand = "/" + arguments.get().replaceAll("-p [0-9]+", "").trim();
+        Reference<PaginationBox> cached = player.getMeta(pageCommand);
+        PaginationBox pages = cached == null ? null : cached.get();
+        if (page == null || pages == null) {
+            pages = list(database, pageCommand, history, origin.toBlockPoint());
+            page = 1;
         }
-        });
         player.print(pages.create(page));
     }
 

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

@@ -25,6 +25,10 @@ import com.google.common.base.Strings;
 import static com.sk89q.worldedit.command.util.Logging.LogMode.POSITION;
 import static com.sk89q.worldedit.command.util.Logging.LogMode.REGION;
 
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.block.BlockDistributionCounter;
+import com.sk89q.worldedit.function.operation.Operations;
+import com.sk89q.worldedit.function.visitor.RegionVisitor;
 import com.sk89q.worldedit.util.formatting.text.TranslatableComponent;
 import com.boydti.fawe.object.clipboard.URIClipboardHolder;
 import com.boydti.fawe.object.mask.IdMask;
@@ -530,25 +534,34 @@ public class SelectionCommands {
                               boolean clipboardDistr,
                       @Switch(name = 'd', desc = "Separate blocks by state")
                               boolean separateStates,
-                      @ArgFlag(name = 'p', desc = "Gets page from a previous distribution.", def = "1")
+                      @ArgFlag(name = 'p', desc = "Gets page from a previous distribution.", def = "")
                               Integer page) throws WorldEditException {
         List<Countable> distribution;
 
         Region region;
+        if (page == null) {
+            Extent extent;
             if (clipboardDistr) {
-            // TODO multi clipboard distribution
                 Clipboard clipboard = session.getClipboard().getClipboard(); // throws if missing
+                extent = clipboard;
                 region = clipboard.getRegion();
-            new ExtentTraverser<AbstractDelegateExtent>(editSession).setNext(new AbstractDelegateExtent(clipboard));
             } else {
+                extent = editSession;
                 region = session.getSelection(world);
             }
             if (separateStates)
-            distribution = (List) editSession.getBlockDistributionWithData(region);
+                distribution = (List) extent.getBlockDistributionWithData(region);
             else
-            distribution = (List) editSession.getBlockDistribution(region);
+                distribution = (List) extent.getBlockDistribution(region);
-
+            session.setLastDistribution(distribution);
-
+            page = 1;
+        } else {
+            distribution = (List) session.getLastDistribution();
+            if (distribution == null) {
+                actor.printError(TranslatableComponent.of("worldedit.distr.no-previous"));
+                return;
+            }
+        }
         if (distribution.isEmpty()) {  // *Should* always be false
             actor.printError(TranslatableComponent.of("worldedit.distr.no-blocks"));
             return;

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

@@ -24,11 +24,10 @@ import static org.slf4j.LoggerFactory.getLogger;
 
 import com.boydti.fawe.beta.IBatchProcessor;
 import com.boydti.fawe.object.HistoryExtent;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.boydti.fawe.object.exception.FaweException;
 import com.boydti.fawe.object.extent.LightingExtent;
 import com.boydti.fawe.util.ExtentTraverser;
-import com.boydti.fawe.util.MainUtil;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.entity.BaseEntity;
@@ -116,7 +115,7 @@ public class AbstractDelegateExtent implements Extent, LightingExtent {
     /*
      History
      */
-    public void setChangeSet(FaweChangeSet changeSet) {
+    public void setChangeSet(AbstractChangeSet changeSet) {
         if (extent instanceof HistoryExtent) {
             HistoryExtent history = ((HistoryExtent) extent);
             if (changeSet == null) {

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

@@ -25,7 +25,7 @@ import com.boydti.fawe.FaweCache;
 import com.boydti.fawe.beta.implementation.filter.block.ExtentFilterBlock;
 import com.boydti.fawe.beta.Filter;
 import com.boydti.fawe.beta.IBatchProcessor;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.boydti.fawe.object.clipboard.WorldCopyClipboard;
 import com.boydti.fawe.object.exception.FaweException;
 import com.boydti.fawe.object.extent.NullExtent;
@@ -34,7 +34,6 @@ import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
-import com.sk89q.worldedit.extent.clipboard.BlockArrayClipboard;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
 import com.sk89q.worldedit.function.RegionMaskingFilter;
 import com.sk89q.worldedit.function.block.BlockReplace;
@@ -659,7 +658,7 @@ public interface Extent extends InputExtent, OutputExtent {
         return processor.construct(this);
     }
 
-    default Extent enableHistory(FaweChangeSet changeSet) {
+    default Extent enableHistory(AbstractChangeSet changeSet) {
         return addProcessor(changeSet);
     }
 

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

@@ -2,11 +2,10 @@ package com.sk89q.worldedit.extent;
 
 import com.boydti.fawe.beta.Filter;
 import com.boydti.fawe.beta.IBatchProcessor;
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.WorldEditException;
-import com.sk89q.worldedit.extent.clipboard.BlockArrayClipboard;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
 import com.sk89q.worldedit.function.generator.GenBase;
 import com.sk89q.worldedit.function.generator.Resource;
@@ -221,7 +220,7 @@ public class PassthroughExtent extends AbstractDelegateExtent {
         return super.addProcessor(processor);
     }
 
-    public Extent enableHistory(FaweChangeSet changeSet) {
+    public Extent enableHistory(AbstractChangeSet changeSet) {
         return super.enableHistory(changeSet);
     }
 

worldedit-core/src/main/java/com/sk89q/worldedit/extent/transform/BlockTransformExtent.java

@@ -105,16 +105,27 @@ public class BlockTransformExtent extends ResettableExtent {
 
 
     private static long combine(Direction... directions) {
-        return Arrays.stream(directions).mapToLong(dir -> (1L << dir.ordinal()))
+        long mask = 0;
-            .reduce(0, (a, b) -> a | b);
+        for (Direction dir : directions) {
+            mask = mask | (1L << dir.ordinal());
+        }
+        return mask;
     }
 
     private static long[] adapt(Direction... dirs) {
-        return Arrays.stream(dirs).mapToLong(dir -> 1L << dir.ordinal()).toArray();
+        long[] arr = new long[dirs.length];
+        for (int i = 0; i < arr.length; i++) {
+            arr[i] = 1L << dirs[i].ordinal();
+        }
+        return arr;
     }
 
     private static long[] adapt(Long... dirs) {
-        return Arrays.stream(dirs).mapToLong(dir -> dir).toArray();
+        long[] arr = new long[dirs.length];
+        for (int i = 0; i < arr.length; i++) {
+            arr[i] = dirs[i];
+        }
+        return arr;
     }
 
     private static long[] getDirections(AbstractProperty property) {
@@ -228,7 +239,9 @@ public class BlockTransformExtent extends ResettableExtent {
     }
 
     private static long notIndex(long mask, int... indexes) {
-        mask |= Arrays.stream(indexes).mapToLong(index -> (1L << (index + values().length))).reduce(0, (a, b) -> a | b);
+        for (int index : indexes) {
+            mask = mask | (1L << (index + values().length));
+        }
         return mask;
     }
 

worldedit-core/src/main/java/com/sk89q/worldedit/function/operation/ChangeSetExecutor.java

@@ -21,14 +21,13 @@ package com.sk89q.worldedit.function.operation;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
-import com.boydti.fawe.object.changeset.FaweChangeSet;
+import com.boydti.fawe.object.changeset.AbstractChangeSet;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.extent.inventory.BlockBag;
 import com.sk89q.worldedit.history.UndoContext;
 import com.sk89q.worldedit.history.change.Change;
 import com.sk89q.worldedit.history.changeset.ChangeSet;
 import java.util.Iterator;
-import java.util.List;
 
 /**
  * Performs an undo or redo from a given {@link ChangeSet}.
@@ -71,8 +70,8 @@ public class ChangeSetExecutor implements Operation {
 
         this.type = type;
         this.context = context;
-        if (changeSet instanceof FaweChangeSet) {
+        if (changeSet instanceof AbstractChangeSet) {
-            iterator = ((FaweChangeSet) changeSet).getIterator(blockBag, inventory, type == Type.REDO);
+            iterator = ((AbstractChangeSet) changeSet).getIterator(blockBag, inventory, type == Type.REDO);
         } else if (type == Type.UNDO) {
             iterator = changeSet.backwardIterator();
         } else {

worldedit-core/src/main/java/com/sk89q/worldedit/history/changeset/ArrayListHistory.java

@@ -21,8 +21,12 @@ package com.sk89q.worldedit.history.changeset;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
+import com.boydti.fawe.object.changeset.SimpleChangeSetSummary;
 import com.google.common.collect.Lists;
+import com.sk89q.worldedit.history.change.BlockChange;
 import com.sk89q.worldedit.history.change.Change;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.regions.Region;
 
 import java.util.ArrayList;
 import java.util.Iterator;
@@ -70,4 +74,16 @@ public class ArrayListHistory implements ChangeSet {
         return changes.size();
     }
 
+    @Override
+    public ChangeSetSummary summarize(Region region, boolean shallow) {
+        SimpleChangeSetSummary summary = new SimpleChangeSetSummary();
+        for (Change change : changes) {
+            if (change instanceof BlockChange) {
+                BlockChange blockChange = (BlockChange) change;
+                BlockVector3 pos = blockChange.getPosition();
+                summary.add(pos.getX(), pos.getZ(), blockChange.getCurrent().getOrdinal());
+            }
+        }
+        return summary;
+    }
 }

worldedit-core/src/main/java/com/sk89q/worldedit/history/changeset/ChangeSet.java

@@ -19,15 +19,22 @@
 
 package com.sk89q.worldedit.history.changeset;
 
+import com.google.common.collect.Maps;
 import com.sk89q.worldedit.history.change.Change;
+import com.sk89q.worldedit.regions.Region;
+import com.sk89q.worldedit.world.block.BlockState;
 
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.Collections;
 import java.util.Iterator;
+import java.util.Map;
 
 /**
  * Tracks a set of undoable operations and allows their undo and redo. The
  * entirety of a change set should be undone and redone at once.
  */
-public interface ChangeSet {
+public interface ChangeSet extends Closeable {
 
     /**
      * Add the given change to the history.
@@ -77,4 +84,34 @@ public interface ChangeSet {
      */
     int size();
 
+    /**
+     * Close the changeset
+     */
+    @Override
+    default void close() throws IOException {
+
+    }
+
+    /**
+     * Delete the changeset (e.g. files on disk, or in a database)
+     */
+    default void delete() {}
+
+    /**
+     * Get a summary of this changeset (or null)
+     * @param region
+     * @param shallow
+     * @return
+     */
+    default ChangeSetSummary summarize(Region region, boolean shallow) {
+        return null;
+    }
+
+    /**
+     * Get if the changeset is empty (i.e. size == 0)
+     * @return is empty
+     */
+    default boolean isEmpty() {
+        return size() == 0;
+    }
 }

worldedit-core/src/main/java/com/sk89q/worldedit/history/changeset/ChangeSetSummary.java

@@ -0,0 +1,37 @@
+package com.sk89q.worldedit.history.changeset;
+
+import com.sk89q.worldedit.util.Countable;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public interface ChangeSetSummary {
+    Map<BlockState, Integer> getBlocks();
+
+    int getSize();
+
+    default List<Countable<BlockState>> getBlockDistributionWithData() {
+        ArrayList<Countable<BlockState>> list = new ArrayList<>();
+        for (Map.Entry<BlockState, Integer> entry : getBlocks().entrySet()) {
+            list.add(new Countable<>(entry.getKey(), entry.getValue()));
+        }
+        return list;
+    }
+
+    default Map<BlockState, Double> getPercents() {
+        Map<BlockState, Integer> map = getBlocks();
+        int count = getSize();
+        Map<BlockState, Double> newMap = new HashMap<>();
+        for (Map.Entry<BlockState, Integer> entry : map.entrySet()) {
+            BlockState id = entry.getKey();
+            int changes = entry.getValue();
+            double percent = (changes * 1000L / count) / 10d;
+            newMap.put(id, percent);
+        }
+        return newMap;
+    }
+}

worldedit-core/src/main/java/com/sk89q/worldedit/util/concurrency/LazyReference.java

@@ -71,5 +71,4 @@ public class LazyReference<T> {
             refInfo.lock.unlock();
         }
     }
-
 }

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

@@ -196,4 +196,34 @@ public abstract class PaginationBox extends MessageBox {
             return lines.size();
         }
     }
+
+    public static class MergedPaginationBox extends PaginationBox {
+        private final PaginationBox[] values;
+
+        public MergedPaginationBox(String header, String pageCommand, PaginationBox... values) {
+            super(header, pageCommand);
+            this.values = values;
+        }
+
+        @Override
+        public Component getComponent(int number) {
+            for (PaginationBox box : values) {
+                int size = box.getComponentsSize();
+                if (size > number) {
+                    return box.getComponent(number);
+                }
+                number -= size;
+            }
+            return null;
+        }
+
+        @Override
+        public int getComponentsSize() {
+            int size = 0;
+            for (PaginationBox box : values) {
+                size += box.getComponentsSize();
+            }
+            return size;
+        }
+    }
 }

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

@@ -4,7 +4,8 @@
 	"fawe.info": "&7{0}",
 	"fawe.debug": "&3{0}",
 
-	"fawe.worldedit.history.find.element": "&8 - &2{0}: {1} &7ago &3{2}m &6{3} &c/{4}",
+	"fawe.worldedit.history.find.element": "&2{0} {1} &7ago &3{2}m &6{3} &c/{4}",
+	"fawe.worldedit.history.find.element.more": " - Changes: {0}\n - Bounds: {1} -> {2}\n - Extra: {3}\n - Size on Disk: {4}",
 	"fawe.worldedit.history.find.hover": "{0} blocks changed, click for more info",
 
 	"fawe.info.lighting.propagate.selection": "Lighting has been propagated in {0} chunks. (Note: To remove light use //removelight)",