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 e7b5f54d2fc53878e9466ccca972df21f10a7d67..56e66fcd840d0d3681ba671d1ffc51b232631461 100644
--- a/src/main/java/net/minecraft/world/level/block/FarmBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/FarmBlock.java
@@ -116,12 +116,20 @@ 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())) {
                 return;
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 5590d2a68e395686d9208c833d642df7ed17a546..6544afaea0c4aaf8c7d07d5e751b73f03c9bad5c 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -463,10 +463,16 @@ 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;