chore: minor improvements to processing-related code (#2271)

worldedit-bukkit/adapters/adapter-1_17_1/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_17_R1_2/PaperweightGetBlocks.java

@@ -445,10 +445,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << layer;
 
-                    // Changes may still be written to chunk SET
+                    char[] setArr = set.load(layerNo);
-                    char[] tmp = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-bukkit/adapters/adapter-1_18_2/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_18_R2/PaperweightGetBlocks.java

@@ -491,9 +491,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << getSectionIndex;
 
-                    char[] tmp = set.load(layerNo);
+                    char[] setArr = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-bukkit/adapters/adapter-1_19/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R1/PaperweightGetBlocks.java

@@ -488,9 +488,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << getSectionIndex;
 
-                    char[] tmp = set.load(layerNo);
+                    char[] setArr = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-bukkit/adapters/adapter-1_19_3/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R2/PaperweightGetBlocks.java

@@ -490,9 +490,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << getSectionIndex;
 
-                    char[] tmp = set.load(layerNo);
+                    char[] setArr = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-bukkit/adapters/adapter-1_19_4/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R3/PaperweightGetBlocks.java

@@ -490,9 +490,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << getSectionIndex;
 
-                    char[] tmp = set.load(layerNo);
+                    char[] setArr = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java

@@ -824,14 +824,15 @@ public class CuboidRegion extends AbstractRegion implements FlatRegion {
             boolean trimX = lowerX != 0 || upperX != 15;
             boolean trimZ = lowerZ != 0 || upperZ != 15;
 
+            if (!(trimX || trimZ)) {
+                return set;
+            }
+
             for (int layer = get.getMinSectionPosition(); layer < get.getMaxSectionPosition(); layer++) {
                 if (!set.hasSection(layer)) {
                     continue;
                 }
                 char[] arr = Objects.requireNonNull(set.loadIfPresent(layer)); // This shouldn't be null if above is true
-                if (!(trimX || trimZ)) {
-                    continue;
-                }
                 int indexY = 0;
                 for (int y = 0; y < 16; y++, indexY += 256) { // For each y layer within a chunk section
                     int index;

worldedit-core/src/main/java/com/sk89q/worldedit/regions/Region.java

@@ -401,11 +401,17 @@ public interface Region extends Iterable<BlockVector3>, Cloneable, IBatchProcess
             // contains some
             boolean processExtra = false;
             for (int layer = getMinimumY() >> 4; layer <= getMaximumY() >> 4; layer++) {
+                if (!set.hasSection(layer)) {
+                    continue;
+                }
                 int by = layer << 4;
                 int ty = by + 15;
                 if (!containsEntireCuboid(bx, tx, by, ty, bz, tz)) {
                     processExtra = true;
-                    char[] arr = set.load(layer);
+                    char[] arr = set.loadIfPresent(layer);
+                    if (arr == null) {
+                        continue;
+                    }
                     for (int y = 0, index = 0; y < 16; y++) {
                         for (int z = 0; z < 16; z++) {
                             for (int x = 0; x < 16; x++, index++) {