Purpur/patches/server/0127-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 d92ea9f29b9d919871662977d3e3eb41ddf2eb35..e5a3e3a4367dfb924624a913b816b3fd56e3fefd 100644
--- a/src/main/java/net/minecraft/world/level/block/FarmBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/FarmBlock.java
@@ -113,12 +113,20 @@ 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 = entity.getArmorSlots().iterator();
+                if (armor.hasNext() && net.minecraft.world.item.enchantment.EnchantmentHelper.getItemEnchantmentLevel(net.minecraft.world.item.enchantment.Enchantments.FALL_PROTECTION, armor.next()) >= (int) entity.fallDistance) {
+                    return;
+                }
+            }
             // Purpur end
             if (CraftEventFactory.callEntityChangeBlockEvent(entity, pos, Blocks.DIRT.defaultBlockState()).isCancelled()) {
                 return;
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 1a26ba2b0eb2126278b052a41e80944c864dd74c..08501fcd8b74a378b5294b96f379ecdc0d67f494 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -459,10 +459,16 @@ 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;