PaperMC/paper-server/nms-patches/net/minecraft/world/level/block/BlockVine.patch

--- a/net/minecraft/world/level/block/BlockVine.java
+++ b/net/minecraft/world/level/block/BlockVine.java
@@ -25,6 +25,8 @@
 import net.minecraft.world.phys.shapes.VoxelShapeCollision;
 import net.minecraft.world.phys.shapes.VoxelShapes;
 
+import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
+
 public class BlockVine extends Block {
 
     public static final MapCodec<BlockVine> CODEC = simpleCodec(BlockVine::new);
@@ -203,30 +205,34 @@
                             BlockPosition blockposition3 = blockposition2.relative(enumdirection1);
                             BlockPosition blockposition4 = blockposition2.relative(enumdirection2);
 
+                            // CraftBukkit start - Call BlockSpreadEvent
+                            BlockPosition source = blockposition;
+
                             if (flag && isAcceptableNeighbour(worldserver, blockposition3, enumdirection1)) {
-                                worldserver.setBlock(blockposition2, (IBlockData) this.defaultBlockState().setValue(getPropertyForFace(enumdirection1), true), 2);
+                                CraftEventFactory.handleBlockSpreadEvent(worldserver, source, blockposition2, (IBlockData) this.defaultBlockState().setValue(getPropertyForFace(enumdirection1), true), 2);
                             } else if (flag1 && isAcceptableNeighbour(worldserver, blockposition4, enumdirection2)) {
-                                worldserver.setBlock(blockposition2, (IBlockData) this.defaultBlockState().setValue(getPropertyForFace(enumdirection2), true), 2);
+                                CraftEventFactory.handleBlockSpreadEvent(worldserver, source, blockposition2, (IBlockData) this.defaultBlockState().setValue(getPropertyForFace(enumdirection2), true), 2);
                             } else {
                                 EnumDirection enumdirection3 = enumdirection.getOpposite();
 
                                 if (flag && worldserver.isEmptyBlock(blockposition3) && isAcceptableNeighbour(worldserver, blockposition.relative(enumdirection1), enumdirection3)) {
-                                    worldserver.setBlock(blockposition3, (IBlockData) this.defaultBlockState().setValue(getPropertyForFace(enumdirection3), true), 2);
+                                    CraftEventFactory.handleBlockSpreadEvent(worldserver, source, blockposition3, (IBlockData) this.defaultBlockState().setValue(getPropertyForFace(enumdirection3), true), 2);
                                 } else if (flag1 && worldserver.isEmptyBlock(blockposition4) && isAcceptableNeighbour(worldserver, blockposition.relative(enumdirection2), enumdirection3)) {
-                                    worldserver.setBlock(blockposition4, (IBlockData) this.defaultBlockState().setValue(getPropertyForFace(enumdirection3), true), 2);
+                                    CraftEventFactory.handleBlockSpreadEvent(worldserver, source, blockposition4, (IBlockData) this.defaultBlockState().setValue(getPropertyForFace(enumdirection3), true), 2);
                                 } else if ((double) randomsource.nextFloat() < 0.05D && isAcceptableNeighbour(worldserver, blockposition2.above(), EnumDirection.UP)) {
-                                    worldserver.setBlock(blockposition2, (IBlockData) this.defaultBlockState().setValue(BlockVine.UP, true), 2);
+                                    CraftEventFactory.handleBlockSpreadEvent(worldserver, source, blockposition2, (IBlockData) this.defaultBlockState().setValue(BlockVine.UP, true), 2);
                                 }
+                                // CraftBukkit end
                             }
                         } else if (isAcceptableNeighbour(worldserver, blockposition2, enumdirection)) {
-                            worldserver.setBlock(blockposition, (IBlockData) iblockdata.setValue(getPropertyForFace(enumdirection), true), 2);
+                            CraftEventFactory.handleBlockGrowEvent(worldserver, blockposition, (IBlockData) iblockdata.setValue(getPropertyForFace(enumdirection), true), 2); // CraftBukkit
                         }
 
                     }
                 } else {
                     if (enumdirection == EnumDirection.UP && blockposition.getY() < worldserver.getMaxBuildHeight() - 1) {
                         if (this.canSupportAtFace(worldserver, blockposition, enumdirection)) {
-                            worldserver.setBlock(blockposition, (IBlockData) iblockdata.setValue(BlockVine.UP, true), 2);
+                            CraftEventFactory.handleBlockGrowEvent(worldserver, blockposition, (IBlockData) iblockdata.setValue(BlockVine.UP, true), 2); // CraftBukkit
                             return;
                         }
 
@@ -246,7 +252,7 @@
                             }
 
                             if (this.hasHorizontalConnection(iblockdata2)) {
-                                worldserver.setBlock(blockposition1, iblockdata2, 2);
+                                CraftEventFactory.handleBlockSpreadEvent(worldserver, blockposition, blockposition1, iblockdata2, 2); // CraftBukkit
                             }
 
                             return;
@@ -261,7 +267,7 @@
                             IBlockData iblockdata4 = this.copyRandomFaces(iblockdata, iblockdata3, randomsource);
 
                             if (iblockdata3 != iblockdata4 && this.hasHorizontalConnection(iblockdata4)) {
-                                worldserver.setBlock(blockposition2, iblockdata4, 2);
+                                CraftEventFactory.handleBlockSpreadEvent(worldserver, blockposition, blockposition2, iblockdata4, 2); // CraftBukkit
                             }
                         }
                     }