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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Hugo Manrique <hugmanrique@gmail.com>
Date: Mon, 23 Jul 2018 14:22:26 +0200
Subject: [PATCH] Vanished players don't have rights
diff --git a/src/main/java/net/minecraft/world/entity/projectile/Projectile.java b/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
index bdefda914a7f93b8393a06f112ea9239d9685d51..54dfc45f9b350a9d4c2872ded5199ad13c797c80 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
@@ -209,7 +209,14 @@ public abstract class Projectile extends Entity {
if (!entity.isSpectator() && entity.isAlive() && entity.isPickable()) {
Entity entity1 = this.getOwner();
+ // Paper start - Cancel hit for vanished players
+ if (entity1 instanceof net.minecraft.server.level.ServerPlayer && entity instanceof net.minecraft.server.level.ServerPlayer) {
+ org.bukkit.entity.Player collided = (org.bukkit.entity.Player) entity.getBukkitEntity();
+ org.bukkit.entity.Player shooter = (org.bukkit.entity.Player) entity1.getBukkitEntity();
+ if (!shooter.canSee(collided)) return false;
+ }
return entity1 == null || this.leftOwner || !entity1.isPassengerOfSameVehicle(entity);
+ // Paper end
} else {
return false;
}
diff --git a/src/main/java/net/minecraft/world/item/BlockItem.java b/src/main/java/net/minecraft/world/item/BlockItem.java
index c3fb7d41688855010c643b91c8d9496486dae089..8175bb6331727440da2232998bdad068a1c47ae8 100644
--- a/src/main/java/net/minecraft/world/item/BlockItem.java
+++ b/src/main/java/net/minecraft/world/item/BlockItem.java
@@ -195,7 +195,8 @@ public class BlockItem extends Item {
Player entityhuman = context.getPlayer();
CollisionContext voxelshapecollision = entityhuman == null ? CollisionContext.empty() : CollisionContext.of(entityhuman);
// CraftBukkit start - store default return
- boolean defaultReturn = (!this.mustSurvive() || state.canSurvive(context.getLevel(), context.getClickedPos())) && context.getLevel().isUnobstructed(state, context.getClickedPos(), voxelshapecollision);
+ Level world = context.getLevel(); // Paper
+ boolean defaultReturn = (!this.mustSurvive() || state.canSurvive(context.getLevel(), context.getClickedPos())) && world.checkEntityCollision(state, entityhuman, voxelshapecollision, context.getClickedPos(), true); // Paper
org.bukkit.entity.Player player = (context.getPlayer() instanceof ServerPlayer) ? (org.bukkit.entity.Player) context.getPlayer().getBukkitEntity() : null;
BlockCanBuildEvent event = new BlockCanBuildEvent(CraftBlock.at(context.getLevel(), context.getClickedPos()), player, CraftBlockData.fromData(state), defaultReturn);
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index e80a9a5df0e4722a12c65c57592879621571a13f..67566e5f95f7452d31bea485bdb91a4e1a32e5d5 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -72,6 +72,10 @@ import net.minecraft.world.level.saveddata.maps.MapItemSavedData;
import net.minecraft.world.level.storage.LevelData;
import net.minecraft.world.level.storage.WritableLevelData;
import net.minecraft.world.phys.AABB;
+import net.minecraft.world.phys.shapes.BooleanOp;
+import net.minecraft.world.phys.shapes.CollisionContext;
+import net.minecraft.world.phys.shapes.Shapes;
+import net.minecraft.world.phys.shapes.VoxelShape;
import net.minecraft.world.scores.Scoreboard;
// CraftBukkit start
@@ -250,6 +254,45 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
this.tileLimiter = new org.spigotmc.TickLimiter(spigotConfig.tileMaxTickTime);
}
+ // Paper start
+ // ret true if no collision
+ public final boolean checkEntityCollision(BlockState data, Entity source, CollisionContext voxelshapedcollision,
+ BlockPos position, boolean checkCanSee) {
+ // Copied from IWorldReader#a(IBlockData, BlockPosition, VoxelShapeCollision) & EntityAccess#a(Entity, VoxelShape)
+ VoxelShape voxelshape = data.getCollisionShape(this, position, voxelshapedcollision);
+ if (voxelshape.isEmpty()) {
+ return true;
+ }
+
+ voxelshape = voxelshape.move((double) position.getX(), (double) position.getY(), (double) position.getZ());
+ if (voxelshape.isEmpty()) {
+ return true;
+ }
+
+ List<Entity> entities = this.getEntities(null, voxelshape.bounds());
+ for (int i = 0, len = entities.size(); i < len; ++i) {
+ Entity entity = entities.get(i);
+
+ if (checkCanSee && source instanceof net.minecraft.server.level.ServerPlayer && entity instanceof net.minecraft.server.level.ServerPlayer
+ && !((net.minecraft.server.level.ServerPlayer) source).getBukkitEntity().canSee(((net.minecraft.server.level.ServerPlayer) entity).getBukkitEntity())) {
+ continue;
+ }
+
+ // !entity1.dead && entity1.i && (entity == null || !entity1.x(entity));
+ // elide the last check since vanilla calls with entity = null
+ // only we care about the source for the canSee check
+ if (entity.isRemoved() || !entity.blocksBuilding) {
+ continue;
+ }
+
+ if (Shapes.joinIsNotEmpty(voxelshape, Shapes.create(entity.getBoundingBox()), BooleanOp.AND)) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+ // Paper end
@Override
public boolean isClientSide() {
return this.isClientSide;
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 63d6e3103ad7decc64c50b0f14b0049c7734b8e7..8620c065e7709bf8a366760073d58f902215d1c0 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -1258,6 +1258,14 @@ public class CraftEventFactory {
Projectile projectile = (Projectile) entity.getBukkitEntity();
org.bukkit.entity.Entity collided = position.getEntity().getBukkitEntity();
com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = new com.destroystokyo.paper.event.entity.ProjectileCollideEvent(projectile, collided);
+
+ if (projectile.getShooter() instanceof Player && collided instanceof Player) {
+ if (!((Player) projectile.getShooter()).canSee((Player) collided)) {
+ event.setCancelled(true);
+ return event;
+ }
+ }
+
Bukkit.getPluginManager().callEvent(event);
return event;
}
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