From 4a0e006c6e3dc63567d84e6bdb28839ea3380941 Mon Sep 17 00:00:00 2001
From: Keuin <keuinx@gmail.com>
Date: Fri, 15 Jan 2021 15:33:52 +0800
Subject: Implement MC-113809 (zero-tick plants farm) reintroduction (only
 cactus is implemented).

---
 .../mixin/Mc113809SugarCaneBlockMixin.java         | 83 ++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/main/java/com/keuin/ohmyvanillamc/mixin/Mc113809SugarCaneBlockMixin.java

(limited to 'src/main/java/com/keuin/ohmyvanillamc/mixin/Mc113809SugarCaneBlockMixin.java')

diff --git a/src/main/java/com/keuin/ohmyvanillamc/mixin/Mc113809SugarCaneBlockMixin.java b/src/main/java/com/keuin/ohmyvanillamc/mixin/Mc113809SugarCaneBlockMixin.java
new file mode 100644
index 0000000..23d4507
--- /dev/null
+++ b/src/main/java/com/keuin/ohmyvanillamc/mixin/Mc113809SugarCaneBlockMixin.java
@@ -0,0 +1,83 @@
+package com.keuin.ohmyvanillamc.mixin;
+
+import com.keuin.ohmyvanillamc.OhMyVanillaMinecraft;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.SugarCaneBlock;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.state.property.IntProperty;
+import net.minecraft.util.math.BlockPos;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Random;
+
+@Mixin(SugarCaneBlock.class)
+public abstract class Mc113809SugarCaneBlockMixin extends Block {
+
+    public Mc113809SugarCaneBlockMixin(Settings settings) {
+        super(settings);
+    }
+
+    @Shadow
+    @Final
+    public static IntProperty AGE;
+
+    /**
+     * Revert to base class (Block) implementation of randomTick: just simply call scheduledTick.
+     * (both 1.15.2 and 1.16.4 are the same)
+     *
+     * @author trueKeuin
+     * @reason revert to the base class `Block` implementation.
+     */
+    @Overwrite
+    public void randomTick(BlockState state, ServerWorld world, BlockPos pos, Random random) {
+        if (OhMyVanillaMinecraft.getConfiguration().isReintroduceZeroTickFarm()) {
+            scheduledTick(state, world, pos, random);
+        } else if (world.isAir(pos.up())) {
+            int i;
+            for (i = 1; world.getBlockState(pos.down(i)).isOf((SugarCaneBlock) (Object) this); ++i) {
+            }
+
+            if (i < 3) {
+                int j = state.get(AGE);
+                if (j == 15) {
+                    world.setBlockState(pos.up(), this.getDefaultState());
+                    world.setBlockState(pos, state.with(AGE, 0), 4);
+                } else {
+                    world.setBlockState(pos, state.with(AGE, j + 1), 4);
+                }
+            }
+        }
+
+    }
+
+    /**
+     * Reintroduce the MC-113809 glitch for sugar cane. The implementation is identical to Minecraft 1.15.2.
+     *
+     * @author trueKeuin
+     * @reason reintroduce MC-113809 for sugar cane.
+     */
+    @Overwrite
+    public void scheduledTick(BlockState state, ServerWorld world, BlockPos pos, Random random) {
+        if (!state.canPlaceAt(world, pos)) {
+            world.breakBlock(pos, true);
+        } else if (world.isAir(pos.up()) && OhMyVanillaMinecraft.getConfiguration().isReintroduceZeroTickFarm()) {
+            int i;
+            for (i = 1; world.getBlockState(pos.down(i)).isOf((SugarCaneBlock) (Object) this); ++i) {
+            }
+
+            if (i < 3) {
+                int j = state.get(AGE);
+                if (j == 15) {
+                    world.setBlockState(pos.up(), this.getDefaultState());
+                    world.setBlockState(pos, state.with(AGE, 0), 4);
+                } else {
+                    world.setBlockState(pos, state.with(AGE, j + 1), 4);
+                }
+            }
+        }
+    }
+}
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