Add support for preventing block drops in BreakEvent

nms-patches/PlayerInteractManager.patch

@@ -194,14 +194,14 @@
              TileEntity tileentity = this.world.getTileEntity(blockposition);
              Block block = iblockdata.getBlock();
  
-+            // CraftBukkit start - Special case skulls, their item data comes from a tile entity
-+            if (iblockdata.getBlock() == Blocks.SKULL && !this.isCreative()) {
++            // CraftBukkit start - Special case skulls, their item data comes from a tile entity (Also check if block should drop items)
++            if (iblockdata.getBlock() == Blocks.SKULL && !this.isCreative() && event.isDropItems()) {
 +                iblockdata.getBlock().dropNaturally(world, blockposition, iblockdata, 1.0F, 0);
 +                return this.c(blockposition);
 +            }
 +
-+            // And shulker boxes too for duplication on cancel reasons
-+            if (iblockdata.getBlock() instanceof BlockShulkerBox) {
++            // And shulker boxes too for duplication on cancel reasons (Also check if block should drop items)
++            if (iblockdata.getBlock() instanceof BlockShulkerBox && event.isDropItems()) {
 +                iblockdata.getBlock().dropNaturally(world, blockposition, iblockdata, 1.0F, 0);
 +                return this.c(blockposition);
 +            }
@@ -210,20 +210,27 @@
              if ((block instanceof BlockCommand || block instanceof BlockStructure) && !this.player.isCreativeAndOp()) {
                  this.world.notify(blockposition, iblockdata, iblockdata, 3);
                  return false;
-@@ -236,6 +369,12 @@
+@@ -231,10 +364,18 @@
+                         itemstack1.a(this.world, iblockdata, blockposition, this.player);
                      }
-                 }
  
+-                    if (flag && flag1) {
++                    // CraftBukkit start - Check if block should drop items
++                    if (flag && flag1 && event.isDropItems()) {
+                         iblockdata.getBlock().a(this.world, this.player, blockposition, iblockdata, tileentity, itemstack2);
+                     }
++                    // CraftBukkit end
++                }
++
 +                // CraftBukkit start - Drop event experience
 +                if (flag && event != null) {
 +                    iblockdata.getBlock().dropExperience(this.world, blockposition, event.getExpToDrop());
-+                }
+                 }
 +                // CraftBukkit end
-+
+ 
                  return flag;
              }
-         }
-@@ -278,63 +417,90 @@
+@@ -278,63 +419,90 @@
          }
      }