Portals created by fire now trigger PortalCreateEvent.

src/main/java/net/minecraft/server/BlockPortal.java

@@ -3,10 +3,12 @@ package net.minecraft.server;
 import java.util.Random;
 
 // CraftBukkit start
+import java.util.ArrayList;
+
 import org.bukkit.Bukkit;
 import org.bukkit.craftbukkit.CraftWorld;
-import org.bukkit.craftbukkit.block.CraftBlock;
 import org.bukkit.event.entity.EntityPortalEnterEvent;
+import org.bukkit.event.world.PortalCreateEvent;
 // CraftBukkit end
 
 public class BlockPortal extends BlockBreakable {
@@ -57,6 +59,11 @@ public class BlockPortal extends BlockBreakable {
         if (b0 == b1) {
             return false;
         } else {
+            // CraftBukkit start
+            java.util.ArrayList<org.bukkit.block.Block> blocks = new ArrayList<org.bukkit.block.Block>();
+            CraftWorld craftWorld = world.getWorld();
+            // CraftBukkit end
+
             if (world.getTypeId(i - b0, j, k - b1) == 0) {
                 i -= b0;
                 k -= b1;
@@ -75,6 +82,13 @@ public class BlockPortal extends BlockBreakable {
                         if (flag) {
                             if (j1 != Block.OBSIDIAN.id) {
                                 return false;
+                            } else {
+                                // CraftBukkit start
+                                org.bukkit.block.Block b = craftWorld.getBlockAt(i + b0 * l, j + i1, k + b1 * l);
+                                if (!blocks.contains(b)) {
+                                    blocks.add(b);
+                                }
+                                // CraftBukkit end
                             }
                         } else if (j1 != 0 && j1 != Block.FIRE.id) {
                             return false;
@@ -83,6 +97,23 @@ public class BlockPortal extends BlockBreakable {
                 }
             }
 
+            // CraftBukkit start
+            for (l = 0; l < 2; ++l) {
+                for (i1 = 0; i1 < 3; ++i1) {
+                    org.bukkit.block.Block b = craftWorld.getBlockAt(i + b0 * l, j + i1, k + b1 * l);
+                    if (!blocks.contains(b)) {
+                        blocks.add(b);
+                    }
+                }
+            }
+
+            PortalCreateEvent event = new PortalCreateEvent(blocks, (org.bukkit.World) craftWorld);
+            Bukkit.getServer().getPluginManager().callEvent(event);
+            if (event.isCancelled()) {
+                return false;
+            }
+            // CraftBukkit end
+
             world.o = true;
 
             for (l = 0; l < 2; ++l) {