// CraftBukkit start
world.captureDrops = new ArrayList<>(); //start capturing all drops happening in the world
//remember the data of the block to break for the event later on
BlockData blockData = this.world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()).getBlockData();

boolean flag = this.c(blockposition); //call the physic update that causes all drops except the ones of the block itself
//if (event.isDropItems()) {
//    for (EntityItem item : world.captureDrops) {
//        world.addEntity(item); //don't drop them here
//    }
//}
//world.captureDrops = null; //keep capturing drops
// CraftBukkit end

if (!this.isCreative()) { //let all the calls run to break the block itself while still capturing drops
    ItemStack itemstack1 = this.player.getItemInMainHand();
    boolean flag1 = this.player.hasBlock(iblockdata);

    itemstack1.a(this.world, iblockdata, blockposition, this.player);
    // CraftBukkit start - Check if block should drop items
    if (flag && flag1 && event.isDropItems()) {
        ItemStack itemstack2 = itemstack1.isEmpty() ? ItemStack.a : itemstack1.cloneItemStack();

        iblockdata.getBlock().a(this.world, this.player, blockposition, iblockdata, tileentity, itemstack2);
    }
    // CraftBukkit end
}
//now captureDrops also has all the drops of the broken block in it
if (event.isDropItems()) {
    for (EntityItem item : world.captureDrops) {
        //call some sort of event for every? drop. since the broken block does not exist anymore on this point
        //i used the remembered BlockData from above and the location as an option to identify the block
        //that break if you have a listener for this event in a plugin. also contains the player and the drop itself
        BlockBreakDropItemEvent blockBreakDropItemEvent = new BlockBreakDropItemEvent(
                (org.bukkit.entity.Item) item.getBukkitEntity(), this.player.getBukkitEntity(),
                blockData, new Location(world.getWorld(), blockposition.getX(), blockposition.getY(), blockposition.getZ())
        );
        this.world.getServer().getPluginManager().callEvent(blockBreakDropItemEvent);
        if(!blockBreakDropItemEvent.isCancelled()) { //if the event did not canceled, drop the item
            world.addEntity(item);
        }
    }
}
world.captureDrops = null; //stop capturing the drops

if (!this.isCreative()) {
    ItemStack itemstack1 = this.player.getItemInMainHand();
    boolean flag1 = this.player.hasBlock(iblockdata);
    itemstack1.a(this.world, iblockdata, blockposition, this.player);
    if (flag && flag1 && event.isDropItems()) {
        ItemStack itemstack2 = itemstack1.isEmpty() ? ItemStack.a : itemstack1.cloneItemStack();
        iblockdata.getBlock().a(this.world, this.player, blockposition, iblockdata, tileentity, itemstack2);
    }
}

boolean hasRan = false;
@EventHandler
 public void itemSpawnEvent(ItemSpawnEvent e)
 {
 List<EntityItem> entityList = ((CraftWorld)e.getEntity().getWorld()).getHandle().captureDrops;
 if(entityList == null) return;
 if(hasRan) return;
 
 hasRan = true;
 for(EntityItem i : entityList)
 {
 Bukkit.broadcastMessage(i.getBukkitEntity().getName());
 }
 }