SPIGOT-3149: StructureGrowEvent for dispenser triggered growth

By: md_5 <git@md-5.net>

paper-server/nms-patches/DispenserRegistry.patch

@@ -1,18 +1,22 @@
 --- a/net/minecraft/server/DispenserRegistry.java
 +++ b/net/minecraft/server/DispenserRegistry.java
-@@ -7,6 +7,11 @@
+@@ -7,6 +7,15 @@
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
 +// CraftBukkit start
++import java.util.List;
++import org.bukkit.Location;
++import org.bukkit.TreeType;
 +import org.bukkit.craftbukkit.inventory.CraftItemStack;
 +import org.bukkit.event.block.BlockDispenseEvent;
++import org.bukkit.event.world.StructureGrowEvent;
 +// CraftBukkit end
 +
  public class DispenserRegistry {
  
      public static final PrintStream a = System.out;
-@@ -69,7 +74,7 @@
+@@ -69,7 +78,7 @@
          BlockDispenser.REGISTRY.a(Items.SPLASH_POTION, new IDispenseBehavior() {
              public ItemStack a(ISourceBlock isourceblock, final ItemStack itemstack) {
                  return (new DispenseBehaviorProjectile() {
@@ -21,7 +25,7 @@
                          return new EntityPotion(world, iposition.getX(), iposition.getY(), iposition.getZ(), itemstack1.cloneItemStack());
                      }
  
-@@ -86,7 +91,7 @@
+@@ -86,7 +95,7 @@
          BlockDispenser.REGISTRY.a(Items.LINGERING_POTION, new IDispenseBehavior() {
              public ItemStack a(ISourceBlock isourceblock, final ItemStack itemstack) {
                  return (new DispenseBehaviorProjectile() {
@@ -30,7 +34,7 @@
                          return new EntityPotion(world, iposition.getX(), iposition.getY(), iposition.getZ(), itemstack1.cloneItemStack());
                      }
  
-@@ -106,14 +111,46 @@
+@@ -106,14 +115,46 @@
                  double d0 = isourceblock.getX() + (double) enumdirection.getAdjacentX();
                  double d1 = (double) ((float) (isourceblock.getBlockPosition().getY() + enumdirection.getAdjacentY()) + 0.2F);
                  double d2 = isourceblock.getZ() + (double) enumdirection.getAdjacentZ();
@@ -79,7 +83,7 @@
                  return itemstack;
              }
          });
-@@ -123,10 +160,39 @@
+@@ -123,10 +164,39 @@
                  double d0 = isourceblock.getX() + (double) enumdirection.getAdjacentX();
                  double d1 = (double) ((float) isourceblock.getBlockPosition().getY() + 0.2F);
                  double d2 = isourceblock.getZ() + (double) enumdirection.getAdjacentZ();
@@ -121,7 +125,7 @@
                  return itemstack;
              }
  
-@@ -147,8 +213,38 @@
+@@ -147,8 +217,38 @@
                  double d4 = random.nextGaussian() * 0.05D + (double) enumdirection.getAdjacentY();
                  double d5 = random.nextGaussian() * 0.05D + (double) enumdirection.getAdjacentZ();
  
@@ -162,7 +166,7 @@
                  return itemstack;
              }
  
-@@ -169,7 +265,53 @@
+@@ -169,7 +269,53 @@
                  ItemBucket itembucket = (ItemBucket) itemstack.getItem();
                  BlockPosition blockposition = isourceblock.getBlockPosition().shift((EnumDirection) isourceblock.e().get(BlockDispenser.FACING));
  
@@ -217,7 +221,7 @@
              }
          };
  
-@@ -196,6 +338,30 @@
+@@ -196,6 +342,30 @@
                      item = Items.LAVA_BUCKET;
                  }
  
@@ -248,7 +252,7 @@
                  world.setAir(blockposition);
                  itemstack.subtract(1);
                  if (itemstack.isEmpty()) {
-@@ -213,14 +379,42 @@
+@@ -213,14 +383,42 @@
              protected ItemStack b(ISourceBlock isourceblock, ItemStack itemstack) {
                  World world = isourceblock.getWorld();
  
@@ -294,7 +298,7 @@
                  } else if (world.getType(blockposition).getBlock() == Blocks.TNT) {
                      Blocks.TNT.postBreak(world, blockposition, Blocks.TNT.getBlockData().set(BlockTNT.EXPLODE, Boolean.valueOf(true)));
                      world.setAir(blockposition);
-@@ -238,6 +432,30 @@
+@@ -238,6 +436,32 @@
                      World world = isourceblock.getWorld();
                      BlockPosition blockposition = isourceblock.getBlockPosition().shift((EnumDirection) isourceblock.e().get(BlockDispenser.FACING));
  
@@ -320,12 +324,41 @@
 +                            return itemstack;
 +                        }
 +                    }
++
++                    world.captureTreeGeneration = true;
 +                    // CraftBukkit end
 +
                      if (ItemDye.a(itemstack, world, blockposition)) {
                          if (!world.isClientSide) {
                              world.triggerEffect(2005, blockposition, 0);
-@@ -256,11 +474,40 @@
+@@ -245,6 +469,26 @@
+                     } else {
+                         this.b = false;
+                     }
++                    // CraftBukkit start
++                    world.captureTreeGeneration = false;
++                    if (world.capturedBlockStates.size() > 0) {
++                        TreeType treeType = BlockSapling.treeType;
++                        BlockSapling.treeType = null;
++                        Location location = new Location(world.getWorld(), blockposition.getX(), blockposition.getY(), blockposition.getZ());
++                        List<org.bukkit.block.BlockState> blocks = (List<org.bukkit.block.BlockState>) world.capturedBlockStates.clone();
++                        world.capturedBlockStates.clear();
++                        StructureGrowEvent structureEvent = null;
++                        if (treeType != null) {
++                            structureEvent = new StructureGrowEvent(location, treeType, false, null, blocks);
++                            org.bukkit.Bukkit.getPluginManager().callEvent(structureEvent);
++                        }
++                        if (structureEvent == null || !structureEvent.isCancelled()) {
++                            for (org.bukkit.block.BlockState blockstate : blocks) {
++                                blockstate.update(true);
++                            }
++                        }
++                    }
++                    // CraftBukkit end
+ 
+                     return itemstack;
+                 } else {
+@@ -256,11 +500,40 @@
              protected ItemStack b(ISourceBlock isourceblock, ItemStack itemstack) {
                  World world = isourceblock.getWorld();
                  BlockPosition blockposition = isourceblock.getBlockPosition().shift((EnumDirection) isourceblock.e().get(BlockDispenser.FACING));
@@ -368,7 +401,7 @@
                  return itemstack;
              }
          });
-@@ -271,6 +518,30 @@
+@@ -271,6 +544,30 @@
                  BlockPosition blockposition = isourceblock.getBlockPosition().shift(enumdirection);
                  BlockSkull blockskull = Blocks.SKULL;
  
@@ -399,7 +432,7 @@
                  this.b = true;
                  if (world.isEmpty(blockposition) && blockskull.b(world, blockposition, itemstack)) {
                      if (!world.isClientSide) {
-@@ -319,6 +590,30 @@
+@@ -319,6 +616,30 @@
                  BlockPosition blockposition = isourceblock.getBlockPosition().shift((EnumDirection) isourceblock.e().get(BlockDispenser.FACING));
                  BlockPumpkin blockpumpkin = (BlockPumpkin) Blocks.PUMPKIN;
  
@@ -430,7 +463,7 @@
                  this.b = true;
                  if (world.isEmpty(blockposition) && blockpumpkin.b(world, blockposition)) {
                      if (!world.isClientSide) {
-@@ -388,6 +683,30 @@
+@@ -388,6 +709,30 @@
              EnumDirection enumdirection = (EnumDirection) isourceblock.e().get(BlockDispenser.FACING);
              BlockPosition blockposition = isourceblock.getBlockPosition().shift(enumdirection);
  
@@ -461,7 +494,7 @@
              this.b = world.a(block, blockposition, false, EnumDirection.DOWN, (Entity) null);
              if (this.b) {
                  EnumDirection enumdirection1 = world.isEmpty(blockposition.down()) ? enumdirection : EnumDirection.UP;
-@@ -456,12 +775,40 @@
+@@ -456,12 +801,40 @@
                  d3 = 0.0D;
              }