PaperMC/nms-patches/BlockVine.patch

--- a/net/minecraft/server/BlockVine.java
+++ b/net/minecraft/server/BlockVine.java
@@ -4,6 +4,8 @@
 import java.util.Random;
 import javax.annotation.Nullable;
 
+import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
+
 public class BlockVine extends Block {
 
     public static final BlockStateBoolean UP = BlockStateBoolean.of("up");
@@ -174,7 +176,13 @@
                         }
 
                         if (((Boolean) iblockdata1.get(BlockVine.NORTH)).booleanValue() || ((Boolean) iblockdata1.get(BlockVine.EAST)).booleanValue() || ((Boolean) iblockdata1.get(BlockVine.SOUTH)).booleanValue() || ((Boolean) iblockdata1.get(BlockVine.WEST)).booleanValue()) {
-                            world.setTypeAndData(blockposition1, iblockdata1, 2);
+                            // CraftBukkit start - Call BlockSpreadEvent
+                            // world.setTypeAndData(blockposition1, iblockdata1, 2);
+                            BlockPosition target = blockposition1;
+                            org.bukkit.block.Block source = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+                            org.bukkit.block.Block block = world.getWorld().getBlockAt(target.getX(), target.getY(), target.getZ());
+                            CraftEventFactory.handleBlockSpreadEvent(block, source, this, toLegacyData(iblockdata1));
+                            // CraftBukkit end
                         }
 
                     }
@@ -196,17 +204,29 @@
                                 BlockPosition blockposition3 = blockposition2.shift(enumdirection2);
                                 BlockPosition blockposition4 = blockposition2.shift(enumdirection3);
 
+                                // CraftBukkit start - Call BlockSpreadEvent
+                                org.bukkit.block.Block source = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+                                org.bukkit.block.Block bukkitBlock = world.getWorld().getBlockAt(blockposition2.getX(), blockposition2.getY(), blockposition2.getZ());
+
                                 if (flag2 && this.x(world.getType(blockposition3))) {
-                                    world.setTypeAndData(blockposition2, this.getBlockData().set(getDirection(enumdirection2), Boolean.valueOf(true)), 2);
+                                    // world.setTypeAndData(blockposition2, this.getBlockData().set(getDirection(enumdirection2), Boolean.valueOf(true)), 2);
+                                    CraftEventFactory.handleBlockSpreadEvent(bukkitBlock, source, this, toLegacyData(this.getBlockData().set(getDirection(enumdirection2), Boolean.valueOf(true))));
                                 } else if (flag3 && this.x(world.getType(blockposition4))) {
-                                    world.setTypeAndData(blockposition2, this.getBlockData().set(getDirection(enumdirection3), Boolean.valueOf(true)), 2);
+                                    // world.setTypeAndData(blockposition2, this.getBlockData().set(getDirection(enumdirection3), Boolean.valueOf(true)), 2);
+                                    CraftEventFactory.handleBlockSpreadEvent(bukkitBlock, source, this, toLegacyData(this.getBlockData().set(getDirection(enumdirection3), Boolean.valueOf(true))));
                                 } else if (flag2 && world.isEmpty(blockposition3) && this.x(world.getType(blockposition.shift(enumdirection2)))) {
-                                    world.setTypeAndData(blockposition3, this.getBlockData().set(getDirection(enumdirection.opposite()), Boolean.valueOf(true)), 2);
+                                    // world.setTypeAndData(blockposition3, this.getBlockData().set(getDirection(enumdirection.opposite()), Boolean.valueOf(true)), 2);
+                                    bukkitBlock = world.getWorld().getBlockAt(blockposition3.getX(), blockposition3.getY(), blockposition3.getZ());
+                                    CraftEventFactory.handleBlockSpreadEvent(bukkitBlock, source, this, toLegacyData(this.getBlockData().set(getDirection(enumdirection.opposite()), Boolean.valueOf(true))));
                                 } else if (flag3 && world.isEmpty(blockposition4) && this.x(world.getType(blockposition.shift(enumdirection3)))) {
-                                    world.setTypeAndData(blockposition4, this.getBlockData().set(getDirection(enumdirection.opposite()), Boolean.valueOf(true)), 2);
+                                    // world.setTypeAndData(blockposition4, this.getBlockData().set(getDirection(enumdirection.opposite()), Boolean.valueOf(true)), 2);
+                                    bukkitBlock = world.getWorld().getBlockAt(blockposition4.getX(), blockposition4.getY(), blockposition4.getZ());
+                                    CraftEventFactory.handleBlockSpreadEvent(bukkitBlock, source, this, toLegacyData(this.getBlockData().set(getDirection(enumdirection.opposite()), Boolean.valueOf(true))));
                                 } else if (this.x(world.getType(blockposition2.up()))) {
-                                    world.setTypeAndData(blockposition2, this.getBlockData(), 2);
+                                    // world.setTypeAndData(blockposition2, this.getBlockData(), 2);
+                                    CraftEventFactory.handleBlockSpreadEvent(bukkitBlock, source, this, toLegacyData(this.getBlockData()));
                                 }
+                                // CraftBukkit end
                             } else if (block.material.k() && iblockdata2.h()) {
                                 world.setTypeAndData(blockposition, iblockdata.set(getDirection(enumdirection), Boolean.valueOf(true)), 2);
                             }
@@ -233,7 +253,12 @@
                                 }
 
                                 if (((Boolean) iblockdata3.get(BlockVine.NORTH)).booleanValue() || ((Boolean) iblockdata3.get(BlockVine.EAST)).booleanValue() || ((Boolean) iblockdata3.get(BlockVine.SOUTH)).booleanValue() || ((Boolean) iblockdata3.get(BlockVine.WEST)).booleanValue()) {
-                                    world.setTypeAndData(blockposition2, iblockdata3, 2);
+                                    // CraftBukkit start - Call BlockSpreadEvent
+                                    // world.setTypeAndData(blockposition2, iblockdata3, 2);
+                                    org.bukkit.block.Block source = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+                                    org.bukkit.block.Block bukkitBlock = world.getWorld().getBlockAt(blockposition2.getX(), blockposition2.getY(), blockposition2.getZ());
+                                    CraftEventFactory.handleBlockSpreadEvent(bukkitBlock, source, this, toLegacyData(iblockdata3));
+                                    // CraftBukkit end
                                 }
                             } else if (block == this) {
                                 iblockdata3 = iblockdata2;