From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Mon, 10 Apr 2023 14:14:31 -0700
Subject: [PATCH] Lag compensate block breaking

Due to TPS catchup being removed, a lost tick will always
affect block breaking.

Additionally, constant low TPS would affect block breaking
in an intrusive manner to the user when there is no need
for that to occur.

diff --git a/src/main/java/io/papermc/paper/threadedregions/RegionizedWorldData.java b/src/main/java/io/papermc/paper/threadedregions/RegionizedWorldData.java
index 41db6c61de36ebb1c214423dca0ba6a0c5a95cc1..65c4e158d81ac5c5788cf4dcb379061aebd23dcd 100644
--- a/src/main/java/io/papermc/paper/threadedregions/RegionizedWorldData.java
+++ b/src/main/java/io/papermc/paper/threadedregions/RegionizedWorldData.java
@@ -432,11 +432,25 @@ public final class RegionizedWorldData {
         return this.tickData;
     }
 
+    // Folia start - lag compensation
+    public static final long SERVER_INIT = System.nanoTime();
+
+    private long lagCompensationTick;
+
+    public long getLagCompensationTick() {
+        return this.lagCompensationTick;
+    }
+    // Folia end - lag compensation
+
     public void updateTickData() {
         this.tickData = this.world.tickData;
         this.hasPhysicsEvent = org.bukkit.event.block.BlockPhysicsEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper
         this.hasEntityMoveEvent = io.papermc.paper.event.entity.EntityMoveEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper
         this.skipHopperEvents = this.world.paperConfig().hopper.disableMoveEvent || org.bukkit.event.inventory.InventoryMoveItemEvent.getHandlerList().getRegisteredListeners().length == 0; // Paper
+        // Folia start - lag compensation
+        // always subtract from server init so that the tick starts at zero, allowing us to cast to int without much worry
+        this.lagCompensationTick = (System.nanoTime() - SERVER_INIT) / TickRegionScheduler.TIME_BETWEEN_TICKS;
+        // Folia end - lag compensation
     }
 
     // connections
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
index 8b685377b8cc2d36f1fb7ec05c72f2240e3f2d80..d6aba41ee2919942fe895db15fb9b19721bce618 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
@@ -124,7 +124,7 @@ public class ServerPlayerGameMode {
     }
 
     public void tick() {
-        ++this.gameTicks; // CraftBukkit; // Folia - region threading
+        this.gameTicks = (int)this.level.getCurrentWorldData().getLagCompensationTick(); // CraftBukkit; // Folia - region threading // Folia - lag compensation
         BlockState iblockdata;
 
         if (this.hasDelayedDestroy) {