Add config entries for polygonal region points limit

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

@@ -82,6 +82,8 @@ public abstract class LocalConfiguration {
     public Set<Integer> disallowedBlocks = new HashSet<Integer>();
     public int defaultChangeLimit = -1;
     public int maxChangeLimit = -1;
+    public int defaultMaxPolygonalPoints = -1;
+    public int maxPolygonalPoints = 20;
     public String shellSaveType = "";
     public SnapshotRepository snapshotRepo = null;
     public int maxRadius = -1;

src/main/java/com/sk89q/worldedit/WorldEdit.java

@@ -761,6 +761,18 @@ public class WorldEdit {
         }
     }
 
+    public int getMaximumPolygonalPoints(LocalPlayer player) {
+        if (player.hasPermission("worldedit.limit.unrestricted") || config.maxPolygonalPoints < 0) {
+            return config.defaultMaxPolygonalPoints;
+        } else {
+            if (config.defaultMaxPolygonalPoints < 0) {
+                return config.maxPolygonalPoints;
+            }
+            return Math.min(config.defaultMaxPolygonalPoints,
+                    config.maxPolygonalPoints);
+        }
+    }
+
     /**
      * Checks to see if the specified radius is within bounds.
      *

src/main/java/com/sk89q/worldedit/commands/SelectionCommands.java

@@ -609,8 +609,12 @@ public class SelectionCommands {
             selector = new ExtendingCuboidRegionSelector(oldSelector);
             player.print("Cuboid: left click for a starting point, right click to extend");
         } else if (typeName.equalsIgnoreCase("poly")) {
-            selector = new Polygonal2DRegionSelector(oldSelector);
+            int maxPoints = we.getMaximumPolygonalPoints(player);
+            selector = new Polygonal2DRegionSelector(oldSelector, maxPoints);
             player.print("2D polygon selector: Left/right click to add a point.");
+            if (maxPoints > -1) {
+                player.print(maxPoints + " points maximum.");
+            }
         } else if (typeName.equalsIgnoreCase("ellipsoid")) {
             selector = new EllipsoidRegionSelector(oldSelector);
             player.print("Ellipsoid selector: left click=center, right click to extend");

src/main/java/com/sk89q/worldedit/regions/Polygonal2DRegionSelector.java

@@ -40,15 +40,25 @@ import com.sk89q.worldedit.cui.SelectionShapeEvent;
  * @author sk89q
  */
 public class Polygonal2DRegionSelector implements RegionSelector, CUIRegion {
+    private int maxPoints;
     private BlockVector pos1;
     private Polygonal2DRegion region;
 
     public Polygonal2DRegionSelector(LocalWorld world) {
+        this(world, 20);
+    }
+
+    public Polygonal2DRegionSelector(LocalWorld world, int maxPoints) {
+        this.maxPoints = maxPoints;
         region = new Polygonal2DRegion(world);
     }
 
     public Polygonal2DRegionSelector(RegionSelector oldSelector) {
-        this(oldSelector.getIncompleteRegion().getWorld());
+        this(oldSelector, 20);
+    }
+
+    public Polygonal2DRegionSelector(RegionSelector oldSelector, int maxPoints) {
+        this(oldSelector.getIncompleteRegion().getWorld(), maxPoints);
         if (oldSelector instanceof Polygonal2DRegionSelector) {
             final Polygonal2DRegionSelector polygonal2DRegionSelector = (Polygonal2DRegionSelector) oldSelector;
 
@@ -108,7 +118,7 @@ public class Polygonal2DRegionSelector implements RegionSelector, CUIRegion {
                 return false;
             }
 
-            if (points.size() >= 20) {
+            if (maxPoints > -1 && points.size() >= maxPoints) {
                 return false;
             }
         }

src/main/java/com/sk89q/worldedit/util/YAMLConfiguration.java

@@ -65,6 +65,10 @@ public class YAMLConfiguration extends LocalConfiguration {
                 "limits.max-blocks-changed.default", defaultChangeLimit));
         maxChangeLimit = Math.max(-1,
                 config.getInt("limits.max-blocks-changed.maximum", maxChangeLimit));
+        defaultMaxPolygonalPoints = Math.max(-1,
+                config.getInt("limits.max-polygonal-points.default", defaultMaxPolygonalPoints));
+        maxPolygonalPoints = Math.max(-1,
+                config.getInt("limits.max-polygonal-points.maximum", maxPolygonalPoints));
         maxRadius = Math.max(-1, config.getInt("limits.max-radius", maxRadius));
         maxSuperPickaxeSize = Math.max(1, config.getInt(
                 "limits.max-super-pickaxe-size", maxSuperPickaxeSize));

src/main/resources/config.yml

@@ -19,6 +19,9 @@ limits:
     max-blocks-changed:
         default: -1
         maximum: -1
+    max-polygonal-points:
+        default: -1
+        maximum: 20
     max-radius: -1
     max-super-pickaxe-size: 5
     max-brush-radius: 5