Purpur/patches/server/0116-Farmland-trampling-changes.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mariell Hoversholm <proximyst@proximyst.com>
Date: Sat, 9 Jan 2021 16:06:40 +0100
Subject: [PATCH] Farmland trampling changes

This lets us choose if farmland trampling is fully disabled or only
players may trample farmland.

This lets us choose if entities can stop trampling if they fall a
distance equal to their feather falling level, plus the extra block
necessary to trample in the first place. Feather Falling 1 requires
you to fall over 3+ blocks to trample. FF 2 requires 4+, etc.

diff --git a/src/main/java/net/minecraft/world/level/block/FarmBlock.java b/src/main/java/net/minecraft/world/level/block/FarmBlock.java
index 99798220b6e0ad06db2ba5c9b74bfb72af185fee..12a0c69f8fec30fad64cbb00af2ca1bbf0ea5153 100644
--- a/src/main/java/net/minecraft/world/level/block/FarmBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/FarmBlock.java
@@ -126,12 +126,20 @@ public class FarmBlock extends Block {
             }
 
             // Purpur start
+            if (world.purpurConfig.farmlandTramplingDisabled) return;
+            if (world.purpurConfig.farmlandTramplingOnlyPlayers && !(entity instanceof Player)) return;
             if (world.purpurConfig.farmlandAlpha) {
                 Block block = world.getBlockState(pos.below()).getBlock();
                 if (block instanceof FenceBlock || block instanceof WallBlock) {
                     return;
                 }
             }
+            if (world.purpurConfig.farmlandTramplingFeatherFalling) {
+                Iterator<net.minecraft.world.item.ItemStack> armor = ((LivingEntity) entity).getArmorSlots().iterator();
+                if (armor.hasNext() && net.minecraft.world.item.enchantment.EnchantmentHelper.getItemEnchantmentLevel(net.minecraft.world.item.enchantment.Enchantments.FEATHER_FALLING, armor.next()) >= (int) entity.fallDistance) {
+                    return;
+                }
+            }
             // Purpur end
             if (!CraftEventFactory.callEntityChangeBlockEvent(entity, pos, Blocks.DIRT.defaultBlockState())) {
                 return;
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 4440d17e6f375c6687273ae8172f6ac593ec16b0..ac1c901b023c3d21f1f4cb258c3eeebe71979d82 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -443,10 +443,16 @@ public class PurpurWorldConfig {
     public boolean farmlandBypassMobGriefing = false;
     public boolean farmlandGetsMoistFromBelow = false;
     public boolean farmlandAlpha = false;
+    public boolean farmlandTramplingDisabled = false;
+    public boolean farmlandTramplingOnlyPlayers = false;
+    public boolean farmlandTramplingFeatherFalling = false;
     private void farmlandSettings() {
         farmlandBypassMobGriefing = getBoolean("blocks.farmland.bypass-mob-griefing", farmlandBypassMobGriefing);
         farmlandGetsMoistFromBelow = getBoolean("blocks.farmland.gets-moist-from-below", farmlandGetsMoistFromBelow);
         farmlandAlpha = getBoolean("blocks.farmland.use-alpha-farmland", farmlandAlpha);
+        farmlandTramplingDisabled = getBoolean("blocks.farmland.disable-trampling", farmlandTramplingDisabled);
+        farmlandTramplingOnlyPlayers = getBoolean("blocks.farmland.only-players-trample", farmlandTramplingOnlyPlayers);
+        farmlandTramplingFeatherFalling = getBoolean("blocks.farmland.feather-fall-distance-affects-trampling", farmlandTramplingFeatherFalling);
     }
 
     public boolean furnaceUseLavaFromUnderneath = false;