PaperMC/patches/server/0518-Fix-interact-event-not-being-called-sometimes.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: TheMolkaPL <themolkapl@gmail.com>
Date: Sun, 21 Jun 2020 17:21:46 +0200
Subject: [PATCH] Fix interact event not being called sometimes

* Call PlayerInteractEvent when left-clicking on a block in adventure
  mode.
* Call PlayerInteractEvent when left-clicking an Entity that is out of
  range in adventure/survival (entity reach is 3.0).

Co-authored-by: Moulberry <james.jenour@protonmail.com>

diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index a32e63f4ffff849aa13daf831b1e436c1112dde2..63535d38c0f7a7fbf19a1e91747f6989d0f72a60 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -1733,7 +1733,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
                                 MutableComponent ichatmutablecomponent = Component.translatable("build.tooHigh", i - 1).withStyle(ChatFormatting.RED);
 
                                 this.player.sendSystemMessage(ichatmutablecomponent, true);
-                            } else if (enuminteractionresult.shouldSwing()) {
+                            } else if (enuminteractionresult.shouldSwing() && !this.player.gameMode.interactResult) { // Paper
                                 this.player.swing(enumhand, true);
                             }
                         }
@@ -2295,13 +2295,20 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
         double d3 = player.gameMode.getGameModeForPlayer() == GameType.CREATIVE ? 5.0D : 4.5D;
         // SPIGOT-5607: Only call interact event if no block or entity is being clicked. Use bukkit ray trace method, because it handles blocks and entities at the same time
         // SPIGOT-7429: Make sure to call PlayerInteractEvent for spectators and non-pickable entities
-        org.bukkit.util.RayTraceResult result = this.player.level().getWorld().rayTrace(origin, origin.getDirection(), d3, org.bukkit.FluidCollisionMode.NEVER, false, 0.1, entity -> {
+        org.bukkit.util.RayTraceResult result = this.player.level().getWorld().rayTrace(origin, origin.getDirection(), d3, org.bukkit.FluidCollisionMode.NEVER, false, 0.0, entity -> { // Paper - change raySize from 0.1 to 0.0
             Entity handle = ((CraftEntity) entity).getHandle();
             return entity != this.player.getBukkitEntity() && this.player.getBukkitEntity().canSee(entity) && !handle.isSpectator() && handle.isPickable() && !handle.isPassengerOfSameVehicle(player);
         });
         if (result == null) {
             CraftEventFactory.callPlayerInteractEvent(this.player, Action.LEFT_CLICK_AIR, this.player.getInventory().getSelected(), InteractionHand.MAIN_HAND);
-        }
+        } else { // Paper start - Fix interact event not being called sometimes
+            GameType gameType = this.player.gameMode.getGameModeForPlayer();
+            if (gameType == GameType.ADVENTURE && result.getHitBlock() != null) {
+                CraftEventFactory.callPlayerInteractEvent(this.player, Action.LEFT_CLICK_BLOCK, io.papermc.paper.util.MCUtil.toBlockPosition(result.getHitPosition()), org.bukkit.craftbukkit.block.CraftBlock.blockFaceToNotch(result.getHitBlockFace()), this.player.getInventory().getSelected(), InteractionHand.MAIN_HAND);
+            } else if (gameType != GameType.CREATIVE && result.getHitEntity() != null && origin.toVector().distanceSquared(result.getHitPosition()) > 3.0D * 3.0D) {
+                CraftEventFactory.callPlayerInteractEvent(this.player, Action.LEFT_CLICK_AIR, this.player.getInventory().getSelected(), InteractionHand.MAIN_HAND);
+            }
+        } // Paper end
 
         // Arm swing animation
         PlayerAnimationEvent event = new PlayerAnimationEvent(this.getCraftPlayer(), (packet.getHand() == InteractionHand.MAIN_HAND) ? PlayerAnimationType.ARM_SWING : PlayerAnimationType.OFF_ARM_SWING);