Upstream Paper

src/main/java/net/minecraft/server/BlockSnow.java

@@ -0,0 +1,125 @@
+package net.minecraft.server;
+
+import java.util.Random;
+import javax.annotation.Nullable;
+
+public class BlockSnow extends Block {
+
+    public static final BlockStateInteger LAYERS = BlockProperties.ae;
+    protected static final VoxelShape[] b = new VoxelShape[] { VoxelShapes.a(), Block.a(0.0D, 0.0D, 0.0D, 16.0D, 2.0D, 16.0D), Block.a(0.0D, 0.0D, 0.0D, 16.0D, 4.0D, 16.0D), Block.a(0.0D, 0.0D, 0.0D, 16.0D, 6.0D, 16.0D), Block.a(0.0D, 0.0D, 0.0D, 16.0D, 8.0D, 16.0D), Block.a(0.0D, 0.0D, 0.0D, 16.0D, 10.0D, 16.0D), Block.a(0.0D, 0.0D, 0.0D, 16.0D, 12.0D, 16.0D), Block.a(0.0D, 0.0D, 0.0D, 16.0D, 14.0D, 16.0D), Block.a(0.0D, 0.0D, 0.0D, 16.0D, 16.0D, 16.0D)};
+
+    protected BlockSnow(Block.Info block_info) {
+        super(block_info);
+        this.v((IBlockData) ((IBlockData) this.blockStateList.getBlockData()).set(BlockSnow.LAYERS, 1));
+    }
+
+    public boolean a(IBlockData iblockdata, IBlockAccess iblockaccess, BlockPosition blockposition, PathMode pathmode) {
+        switch (pathmode) {
+        case LAND:
+            return (Integer) iblockdata.get(BlockSnow.LAYERS) < 5;
+        case WATER:
+            return false;
+        case AIR:
+            return false;
+        default:
+            return false;
+        }
+    }
+
+    public boolean a(IBlockData iblockdata) {
+        return (Integer) iblockdata.get(BlockSnow.LAYERS) == 8;
+    }
+
+    public EnumBlockFaceShape a(IBlockAccess iblockaccess, IBlockData iblockdata, BlockPosition blockposition, EnumDirection enumdirection) {
+        return enumdirection == EnumDirection.DOWN ? EnumBlockFaceShape.SOLID : EnumBlockFaceShape.UNDEFINED;
+    }
+
+    public VoxelShape a(IBlockData iblockdata, IBlockAccess iblockaccess, BlockPosition blockposition) {
+        return BlockSnow.b[(Integer) iblockdata.get(BlockSnow.LAYERS)];
+    }
+
+    public VoxelShape f(IBlockData iblockdata, IBlockAccess iblockaccess, BlockPosition blockposition) {
+        return BlockSnow.b[(Integer) iblockdata.get(BlockSnow.LAYERS) - 1];
+    }
+
+    public boolean canPlace(IBlockData iblockdata, IWorldReader iworldreader, BlockPosition blockposition) {
+        IBlockData iblockdata1 = iworldreader.getType(blockposition.down());
+        Block block = iblockdata1.getBlock();
+
+        if (block != Blocks.ICE && block != Blocks.PACKED_ICE && block != Blocks.BARRIER) {
+            EnumBlockFaceShape enumblockfaceshape = iblockdata1.c(iworldreader, blockposition.down(), EnumDirection.UP);
+
+            return enumblockfaceshape == EnumBlockFaceShape.SOLID || iblockdata1.a(TagsBlock.LEAVES) || block == this && (Integer) iblockdata1.get(BlockSnow.LAYERS) == 8;
+        } else {
+            return false;
+        }
+    }
+
+    public IBlockData updateState(IBlockData iblockdata, EnumDirection enumdirection, IBlockData iblockdata1, GeneratorAccess generatoraccess, BlockPosition blockposition, BlockPosition blockposition1) {
+        return !iblockdata.canPlace(generatoraccess, blockposition) ? Blocks.AIR.getBlockData() : super.updateState(iblockdata, enumdirection, iblockdata1, generatoraccess, blockposition, blockposition1);
+    }
+
+    public void a(World world, EntityHuman entityhuman, BlockPosition blockposition, IBlockData iblockdata, @Nullable TileEntity tileentity, ItemStack itemstack) {
+        Integer integer = (Integer) iblockdata.get(BlockSnow.LAYERS);
+
+        if (this.X_() && EnchantmentManager.getEnchantmentLevel(Enchantments.SILK_TOUCH, itemstack) > 0) {
+            if (integer == 8) {
+                a(world, blockposition, new ItemStack(Blocks.SNOW_BLOCK));
+            } else {
+                for (int i = 0; i < integer; ++i) {
+                    a(world, blockposition, this.t(iblockdata));
+                }
+            }
+        } else {
+            a(world, blockposition, new ItemStack(Items.SNOWBALL, integer));
+        }
+
+        world.setAir(blockposition);
+        entityhuman.b(StatisticList.BLOCK_MINED.b(this));
+        entityhuman.applyExhaustion(0.005F);
+    }
+
+    public IMaterial getDropType(IBlockData iblockdata, World world, BlockPosition blockposition, int i) {
+        return Items.AIR;
+    }
+
+    public void a(IBlockData iblockdata, World world, BlockPosition blockposition, Random random) {
+        if (world.getBrightness(EnumSkyBlock.BLOCK, blockposition) > 11) {
+            // CraftBukkit start
+            if (org.bukkit.craftbukkit.event.CraftEventFactory.callBlockFadeEvent(world, blockposition, Blocks.AIR.getBlockData()).isCancelled()) {
+                return;
+            }
+            // CraftBukkit end
+            iblockdata.a(world, blockposition, 0);
+            world.setAir(blockposition);
+        }
+
+    }
+
+    public boolean a(IBlockData iblockdata, BlockActionContext blockactioncontext) {
+        int i = (Integer) iblockdata.get(BlockSnow.LAYERS);
+
+        return blockactioncontext.getItemStack().getItem() == this.getItem() && i < 8 ? (blockactioncontext.c() ? blockactioncontext.getClickedFace() == EnumDirection.UP : true) : i == 1;
+    }
+
+    @Nullable
+    public IBlockData getPlacedState(BlockActionContext blockactioncontext) {
+        IBlockData iblockdata = blockactioncontext.getWorld().getType(blockactioncontext.getClickPosition());
+
+        if (iblockdata.getBlock() == this) {
+            int i = (Integer) iblockdata.get(BlockSnow.LAYERS);
+
+            return (IBlockData) iblockdata.set(BlockSnow.LAYERS, Math.min(8, i + 1));
+        } else {
+            return super.getPlacedState(blockactioncontext);
+        }
+    }
+
+    protected void a(BlockStateList.a<Block, IBlockData> blockstatelist_a) {
+        blockstatelist_a.a(BlockSnow.LAYERS);
+    }
+
+    protected boolean X_() {
+        return true;
+    }
+}