From c2cbdc5ab41fe4f77a5a28f01d8b79098b1bb392 Mon Sep 17 00:00:00 2001
From: md_5 <git@md-5.net>
Date: Mon, 27 Aug 2018 18:27:59 +1000
Subject: [PATCH] SPIGOT-4316: Do even less processing when block placement
 without physics requested

---
 nms-patches/Chunk.patch                       | 34 ++++++++++++++-----
 nms-patches/World.patch                       |  3 +-
 .../bukkit/craftbukkit/block/CraftBlock.java  |  2 +-
 3 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/nms-patches/Chunk.patch b/nms-patches/Chunk.patch
index 41edc035e3..321b2b3821 100644
--- a/nms-patches/Chunk.patch
+++ b/nms-patches/Chunk.patch
@@ -80,17 +80,33 @@
      }
  
      public Set<BlockPosition> t() {
-@@ -473,7 +513,8 @@
+@@ -412,8 +452,15 @@
+         }
+     }
+ 
++    // CraftBukkit start
+     @Nullable
+     public IBlockData a(BlockPosition blockposition, IBlockData iblockdata, boolean flag) {
++        return this.a(blockposition, iblockdata, flag, true);
++    }
++
++    @Nullable
++    public IBlockData a(BlockPosition blockposition, IBlockData iblockdata, boolean flag, boolean doPlace) {
++        // CraftBukkit end
+         int i = blockposition.getX() & 15;
+         int j = blockposition.getY();
+         int k = blockposition.getZ() & 15;
+@@ -473,7 +520,8 @@
                      }
                  }
  
 -                if (!this.world.isClientSide) {
 +                // CraftBukkit - Don't place while processing the BlockPlaceEvent, unless it's a BlockContainer. Prevents blocks such as TNT from activating when cancelled.
-+                if (!this.world.isClientSide && (!this.world.captureBlockStates || block instanceof BlockTileEntity)) {
++                if (!this.world.isClientSide && doPlace && (!this.world.captureBlockStates || block instanceof BlockTileEntity)) {
                      iblockdata.onPlace(this.world, blockposition, iblockdata1);
                  }
  
-@@ -653,7 +694,12 @@
+@@ -653,7 +701,12 @@
  
      @Nullable
      public TileEntity a(BlockPosition blockposition, Chunk.EnumTileEntityState chunk_enumtileentitystate) {
@@ -104,7 +120,7 @@
  
          if (tileentity == null) {
              if (chunk_enumtileentitystate == Chunk.EnumTileEntityState.IMMEDIATE) {
-@@ -688,6 +734,13 @@
+@@ -688,6 +741,13 @@
  
              tileentity.z();
              this.tileEntities.put(blockposition, tileentity);
@@ -118,7 +134,7 @@
          }
      }
  
-@@ -720,6 +773,17 @@
+@@ -720,6 +780,17 @@
              }));
          }
  
@@ -136,7 +152,7 @@
      }
  
      public void removeEntities() {
-@@ -736,9 +800,21 @@
+@@ -736,9 +807,21 @@
          int i = aentityslice.length;
  
          for (int j = 0; j < i; ++j) {
@@ -160,7 +176,7 @@
          }
  
      }
-@@ -800,8 +876,8 @@
+@@ -800,8 +883,8 @@
              while (iterator.hasNext()) {
                  Entity entity = (Entity) iterator.next();
  
@@ -171,7 +187,7 @@
                  }
              }
          }
-@@ -1007,13 +1083,13 @@
+@@ -1007,13 +1090,13 @@
  
      @Nullable
      public LongSet b(String s) {
@@ -187,7 +203,7 @@
              return new LongOpenHashSet();
          })).add(i);
      }
-@@ -1061,14 +1137,14 @@
+@@ -1061,14 +1144,14 @@
              }
  
              if (this.s instanceof ProtoChunkTickList) {
diff --git a/nms-patches/World.patch b/nms-patches/World.patch
index 1e96e1705b..78569d8c16 100644
--- a/nms-patches/World.patch
+++ b/nms-patches/World.patch
@@ -146,6 +146,7 @@
          } else {
              Chunk chunk = this.getChunkAtWorldCoords(blockposition);
              Block block = iblockdata.getBlock();
+-            IBlockData iblockdata1 = chunk.a(blockposition, iblockdata, (i & 64) != 0);
 +
 +            // CraftBukkit start - capture blockstates
 +            CraftBlockState blockstate = null;
@@ -155,7 +156,7 @@
 +            }
 +            // CraftBukkit end
 +
-             IBlockData iblockdata1 = chunk.a(blockposition, iblockdata, (i & 64) != 0);
++            IBlockData iblockdata1 = chunk.a(blockposition, iblockdata, (i & 64) != 0, (i & 1024) == 0); // CraftBukkit custom NO_PLACE flag
  
              if (iblockdata1 == null) {
 +                // CraftBukkit start - remove blockstate if failed
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
index 370a222f83..922266441d 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
@@ -157,7 +157,7 @@ public class CraftBlock implements Block {
             return world.setTypeAndData(position, blockData, 3);
         } else {
             IBlockData old = world.getType(position);
-            boolean success = world.setTypeAndData(position, blockData, 18); // NOTIFY | NO_OBSERVER
+            boolean success = world.setTypeAndData(position, blockData, 2 | 16 | 1024); // NOTIFY | NO_OBSERVER | NO_PLACE (custom)
             if (success) {
                 world.getMinecraftWorld().notify(
                         position,