PaperMC/nms-patches/BlockFire.patch

--- a/net/minecraft/server/BlockFire.java
+++ b/net/minecraft/server/BlockFire.java
@@ -5,6 +5,12 @@
 import java.util.Random;
 import javax.annotation.Nullable;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.event.block.BlockBurnEvent;
+import org.bukkit.event.block.BlockSpreadEvent;
+// CraftBukkit end
+
 public class BlockFire extends Block {
 
     public static final BlockStateInteger AGE = BlockStateInteger.of("age", 0, 15);
@@ -95,7 +101,7 @@
     public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
         if (world.getGameRules().getBoolean("doFireTick")) {
             if (!this.canPlace(world, blockposition)) {
-                world.setAir(blockposition);
+                fireExtinguished(world, blockposition); // CraftBukkit - invalid place location
             }
 
             Block block = world.getType(blockposition.down()).getBlock();
@@ -108,7 +114,7 @@
             int i = ((Integer) iblockdata.get(BlockFire.AGE)).intValue();
 
             if (!flag && world.isRaining() && this.b(world, blockposition) && random.nextFloat() < 0.2F + (float) i * 0.03F) {
-                world.setAir(blockposition);
+                fireExtinguished(world, blockposition); // CraftBukkit - extinguished by rain
             } else {
                 if (i < 15) {
                     iblockdata = iblockdata.set(BlockFire.AGE, Integer.valueOf(i + random.nextInt(3) / 2));
@@ -119,14 +125,14 @@
                 if (!flag) {
                     if (!this.c(world, blockposition)) {
                         if (!world.getType(blockposition.down()).q() || i > 3) {
-                            world.setAir(blockposition);
+                            fireExtinguished(world, blockposition); // CraftBukkit
                         }
 
                         return;
                     }
 
                     if (!this.c((IBlockAccess) world, blockposition.down()) && i == 15 && random.nextInt(4) == 0) {
-                        world.setAir(blockposition);
+                        fireExtinguished(world, blockposition); // CraftBukkit
                         return;
                     }
                 }
@@ -138,12 +144,14 @@
                     b0 = -50;
                 }
 
-                this.a(world, blockposition.east(), 300 + b0, random, i);
-                this.a(world, blockposition.west(), 300 + b0, random, i);
-                this.a(world, blockposition.down(), 250 + b0, random, i);
-                this.a(world, blockposition.up(), 250 + b0, random, i);
-                this.a(world, blockposition.north(), 300 + b0, random, i);
-                this.a(world, blockposition.south(), 300 + b0, random, i);
+                // CraftBukkit start - add source blockposition to burn calls
+                this.a(world, blockposition.east(), 300 + b0, random, i, blockposition);
+                this.a(world, blockposition.west(), 300 + b0, random, i, blockposition);
+                this.a(world, blockposition.down(), 250 + b0, random, i, blockposition);
+                this.a(world, blockposition.up(), 250 + b0, random, i, blockposition);
+                this.a(world, blockposition.north(), 300 + b0, random, i, blockposition);
+                this.a(world, blockposition.south(), 300 + b0, random, i, blockposition);
+                // CraftBukkit end
 
                 for (int j = -1; j <= 1; ++j) {
                     for (int k = -1; k <= 1; ++k) {
@@ -172,7 +180,26 @@
                                             l1 = 15;
                                         }
 
-                                        world.setTypeAndData(blockposition1, iblockdata.set(BlockFire.AGE, Integer.valueOf(l1)), 3);
+                                        // CraftBukkit start - Call to stop spread of fire
+                                        if (world.getType(blockposition1) != Blocks.FIRE) {
+                                            if (CraftEventFactory.callBlockIgniteEvent(world, blockposition1.getX(), blockposition1.getY(), blockposition1.getZ(), blockposition.getX(), blockposition.getY(), blockposition.getZ()).isCancelled()) {
+                                                continue;
+                                            }
+
+                                            org.bukkit.Server server = world.getServer();
+                                            org.bukkit.World bworld = world.getWorld();
+                                            org.bukkit.block.BlockState blockState = bworld.getBlockAt(blockposition1.getX(), blockposition1.getY(), blockposition1.getZ()).getState();
+                                            blockState.setTypeId(Block.getId(this));
+                                            blockState.setData(new org.bukkit.material.MaterialData(Block.getId(this), (byte) l1));
+
+                                            BlockSpreadEvent spreadEvent = new BlockSpreadEvent(blockState.getBlock(), bworld.getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()), blockState);
+                                            server.getPluginManager().callEvent(spreadEvent);
+
+                                            if (!spreadEvent.isCancelled()) {
+                                                blockState.update(true);
+                                            }
+                                        }
+                                        // CraftBukkit end
                                     }
                                 }
                             }
@@ -204,12 +231,24 @@
         return integer == null ? 0 : integer.intValue();
     }
 
-    private void a(World world, BlockPosition blockposition, int i, Random random, int j) {
+    private void a(World world, BlockPosition blockposition, int i, Random random, int j, BlockPosition sourceposition) { // CraftBukkit add sourceposition
         int k = this.e(world.getType(blockposition).getBlock());
 
         if (random.nextInt(i) < k) {
             IBlockData iblockdata = world.getType(blockposition);
 
+            // CraftBukkit start
+            org.bukkit.block.Block theBlock = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+            org.bukkit.block.Block sourceBlock = world.getWorld().getBlockAt(sourceposition.getX(), sourceposition.getY(), sourceposition.getZ());
+
+            BlockBurnEvent event = new BlockBurnEvent(theBlock, sourceBlock);
+            world.getServer().getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                return;
+            }
+            // CraftBukkit end
+
             if (random.nextInt(j + 10) < 5 && !world.isRainingAt(blockposition)) {
                 int l = j + random.nextInt(5) / 4;
 
@@ -276,7 +315,7 @@
 
     public void a(IBlockData iblockdata, World world, BlockPosition blockposition, Block block, BlockPosition blockposition1) {
         if (!world.getType(blockposition.down()).q() && !this.c(world, blockposition)) {
-            world.setAir(blockposition);
+            fireExtinguished(world, blockposition); // CraftBukkit - fuel block gone
         }
 
     }
@@ -284,7 +323,7 @@
     public void onPlace(World world, BlockPosition blockposition, IBlockData iblockdata) {
         if (world.worldProvider.getDimensionManager().getDimensionID() > 0 || !Blocks.PORTAL.b(world, blockposition)) {
             if (!world.getType(blockposition.down()).q() && !this.c(world, blockposition)) {
-                world.setAir(blockposition);
+                fireExtinguished(world, blockposition); // CraftBukkit - fuel block broke
             } else {
                 world.a(blockposition, (Block) this, this.a(world) + world.random.nextInt(10));
             }
@@ -310,4 +349,12 @@
     public EnumBlockFaceShape a(IBlockAccess iblockaccess, IBlockData iblockdata, BlockPosition blockposition, EnumDirection enumdirection) {
         return EnumBlockFaceShape.UNDEFINED;
     }
+
+    // CraftBukkit start
+    private void fireExtinguished(World world, BlockPosition position) {
+        if (!CraftEventFactory.callBlockFadeEvent(world.getWorld().getBlockAt(position.getX(), position.getY(), position.getZ()), Blocks.AIR).isCancelled()) {
+            world.setAir(position);
+        }
+    }
+    // CraftBukkit end
 }