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Paper/patches/server/0570-Add-StructuresLocateEvent.patch
Spottedleaf 41647af74c Do not use worldgen executor for api profile completions 
We cannot put blocking network I/O onto the worldgen threads,
this will crash the server if it stalls
2022-07-03 14:55:56 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: dfsek <dfsek@protonmail.com>
Date: Wed, 16 Sep 2020 01:12:29 -0700
Subject: [PATCH] Add StructuresLocateEvent
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
diff --git a/src/main/java/io/papermc/paper/registry/RegistryKey.java b/src/main/java/io/papermc/paper/registry/RegistryKey.java
index 6f39e343147803e15e7681c993b8797a629702e7..87154ae69788249960bca376aafd90bf64d5bfe7 100644
--- a/src/main/java/io/papermc/paper/registry/RegistryKey.java
+++ b/src/main/java/io/papermc/paper/registry/RegistryKey.java
@@ -1,8 +1,13 @@
package io.papermc.paper.registry;
+import io.papermc.paper.world.structure.ConfiguredStructure;
import net.minecraft.core.Registry;
import net.minecraft.resources.ResourceKey;
+import net.minecraft.world.level.levelgen.structure.Structure;
import org.bukkit.Keyed;
public record RegistryKey<API extends Keyed, MINECRAFT>(Class<API> apiClass, ResourceKey<? extends Registry<MINECRAFT>> resourceKey) {
+
+ public static final RegistryKey<ConfiguredStructure, Structure> CONFIGURED_STRUCTURE_REGISTRY = new RegistryKey<>(ConfiguredStructure.class, Registry.STRUCTURE_REGISTRY);
+
}
diff --git a/src/main/java/io/papermc/paper/world/structure/PaperConfiguredStructure.java b/src/main/java/io/papermc/paper/world/structure/PaperConfiguredStructure.java
new file mode 100644
index 0000000000000000000000000000000000000000..423bf87ebda7ea266dc7b48cbfadbc8551180721
--- /dev/null
+++ b/src/main/java/io/papermc/paper/world/structure/PaperConfiguredStructure.java
@@ -0,0 +1,42 @@
+package io.papermc.paper.world.structure;
+
+import io.papermc.paper.registry.PaperRegistry;
+import io.papermc.paper.registry.RegistryKey;
+import net.minecraft.core.Registry;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.levelgen.structure.Structure;
+import org.bukkit.NamespacedKey;
+import org.bukkit.StructureType;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.framework.qual.DefaultQualifier;
+
+import java.util.Objects;
+import java.util.function.Supplier;
+
+@DefaultQualifier(NonNull.class)
+public final class PaperConfiguredStructure {
+
+ private PaperConfiguredStructure() {
+ }
+
+ public static void init() {
+ new ConfiguredStructureRegistry().register();
+ }
+
+ static final class ConfiguredStructureRegistry extends PaperRegistry<ConfiguredStructure, Structure> {
+
+ private static final Supplier<Registry<Structure>> STRUCTURE_FEATURE_REGISTRY = registryFor(Registry.STRUCTURE_REGISTRY);
+
+ public ConfiguredStructureRegistry() {
+ super(RegistryKey.CONFIGURED_STRUCTURE_REGISTRY);
+ }
+
+ @Override
+ public @Nullable ConfiguredStructure convertToApi(NamespacedKey key, Structure nms) {
+ final ResourceLocation structureTypeLoc = Objects.requireNonNull(Registry.STRUCTURE_TYPES.getKey(nms.type()), "unexpected structure type " + nms.type());
+ final @Nullable StructureType structureType = StructureType.getStructureTypes().get(structureTypeLoc.getPath());
+ return structureType == null ? null : new ConfiguredStructure(key, structureType);
+ }
+ }
+}
diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
index 0f92f2906195f5b2b70ca02a46fa111a46f8f18f..a4e2ee3efde40c902555f982ffa546c24bc31377 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
@@ -295,6 +295,26 @@ public abstract class ChunkGenerator {
@Nullable
public Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel world, HolderSet<Structure> structures, BlockPos center, int radius, boolean skipReferencedStructures) {
+ // Paper start - StructureLocateEvent
+ final org.bukkit.World bukkitWorld = world.getWorld();
+ final org.bukkit.Location origin = net.minecraft.server.MCUtil.toLocation(world, center);
+ final var paperRegistry = io.papermc.paper.registry.PaperRegistry.getRegistry(io.papermc.paper.registry.RegistryKey.CONFIGURED_STRUCTURE_REGISTRY);
+ final List<io.papermc.paper.world.structure.ConfiguredStructure> configuredStructures = new ArrayList<>();
+ paperRegistry.convertToApi(structures, configuredStructures::add, false); // gracefully handle missing api, use tests to check (or exclude)
+ if (!configuredStructures.isEmpty()) {
+ final io.papermc.paper.event.world.StructuresLocateEvent event = new io.papermc.paper.event.world.StructuresLocateEvent(bukkitWorld, origin, configuredStructures, radius, skipReferencedStructures);
+ if (!event.callEvent()) {
+ return null;
+ }
+ if (event.getResult() != null) {
+ return Pair.of(net.minecraft.server.MCUtil.toBlockPosition(event.getResult().position()), paperRegistry.getMinecraftHolder(event.getResult().configuredStructure()));
+ }
+ center = net.minecraft.server.MCUtil.toBlockPosition(event.getOrigin());
+ radius = event.getRadius();
+ skipReferencedStructures = event.shouldFindUnexplored();
+ structures = HolderSet.direct(paperRegistry::getMinecraftHolder, event.getConfiguredStructures());
+ }
+ // Paper end
Map<StructurePlacement, Set<Holder<Structure>>> map = new Object2ObjectArrayMap();
Iterator iterator = structures.iterator();
diff --git a/src/main/java/net/minecraft/world/level/levelgen/structure/Structure.java b/src/main/java/net/minecraft/world/level/levelgen/structure/Structure.java
index 737956b316c02e4ccdc6eef8de4a0a299d36b9ca..b8649eab719a1b71dc686386a8db756eefb9802e 100644
--- a/src/main/java/net/minecraft/world/level/levelgen/structure/Structure.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/structure/Structure.java
@@ -41,6 +41,7 @@ public abstract class Structure {
public static final Codec<Structure> DIRECT_CODEC = Registry.STRUCTURE_TYPES.byNameCodec().dispatch(Structure::type, StructureType::codec);
public static final Codec<Holder<Structure>> CODEC = RegistryFileCodec.create(Registry.STRUCTURE_REGISTRY, DIRECT_CODEC);
protected final Structure.StructureSettings settings;
+ static { io.papermc.paper.world.structure.PaperConfiguredStructure.init(); } // Paper
public static <S extends Structure> RecordCodecBuilder<S, Structure.StructureSettings> settingsCodec(RecordCodecBuilder.Instance<S> instance) {
return Structure.StructureSettings.CODEC.forGetter((feature) -> {
diff --git a/src/test/java/io/papermc/paper/world/structure/ConfiguredStructureTest.java b/src/test/java/io/papermc/paper/world/structure/ConfiguredStructureTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..61efebe1d363b34e2043ccc4c6e28bb714c2fa31
--- /dev/null
+++ b/src/test/java/io/papermc/paper/world/structure/ConfiguredStructureTest.java
@@ -0,0 +1,92 @@
+package io.papermc.paper.world.structure;
+
+import io.papermc.paper.registry.Reference;
+import net.minecraft.data.BuiltinRegistries;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.Bootstrap;
+import net.minecraft.world.level.levelgen.structure.Structure;
+import net.minecraft.world.level.levelgen.structure.BuiltinStructures;
+import org.bukkit.NamespacedKey;
+import org.bukkit.craftbukkit.util.CraftNamespacedKey;
+import org.bukkit.support.AbstractTestingBase;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.PrintStream;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.StringJoiner;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+public class ConfiguredStructureTest extends AbstractTestingBase {
+
+ private static final Map<ResourceLocation, String> BUILT_IN_STRUCTURES = new LinkedHashMap<>();
+ private static final Map<NamespacedKey, Reference<?>> DEFAULT_CONFIGURED_STRUCTURES = new LinkedHashMap<>();
+
+ private static PrintStream out;
+
+ @BeforeClass
+ public static void collectStructures() throws ReflectiveOperationException {
+ out = System.out;
+ System.setOut(Bootstrap.STDOUT);
+ for (Field field : BuiltinStructures.class.getDeclaredFields()) {
+ if (field.getType().equals(ResourceKey.class) && Modifier.isStatic(field.getModifiers())) {
+ BUILT_IN_STRUCTURES.put(((ResourceKey<?>) field.get(null)).location(), field.getName());
+ }
+ }
+ for (Field field : ConfiguredStructure.class.getDeclaredFields()) {
+ if (field.getType().equals(Reference.class) && Modifier.isStatic(field.getModifiers())) {
+ final Reference<?> ref = (Reference<?>) field.get(null);
+ DEFAULT_CONFIGURED_STRUCTURES.put(ref.getKey(), ref);
+ }
+ }
+ }
+
+ @Test
+ public void testMinecraftToApi() {
+ assertEquals("configured structure maps should be the same size", BUILT_IN_STRUCTURES.size(), BuiltinRegistries.STRUCTURES.size());
+
+ Map<ResourceLocation, Structure> missing = new LinkedHashMap<>();
+ for (Structure feature : BuiltinRegistries.STRUCTURES) {
+ final ResourceLocation key = BuiltinRegistries.STRUCTURES.getKey(feature);
+ assertNotNull("Missing built-in registry key", key);
+ if (key.equals(BuiltinStructures.ANCIENT_CITY.location())) {
+ continue; // TODO remove when upstream adds "jigsaw" StructureType
+ }
+ if (DEFAULT_CONFIGURED_STRUCTURES.get(CraftNamespacedKey.fromMinecraft(key)) == null) {
+ missing.put(key, feature);
+ }
+ }
+
+ assertTrue(printMissing(missing), missing.isEmpty());
+ }
+
+ @Test
+ public void testApiToMinecraft() {
+ for (NamespacedKey apiKey : DEFAULT_CONFIGURED_STRUCTURES.keySet()) {
+ assertTrue(apiKey + " does not have a minecraft counterpart", BuiltinRegistries.STRUCTURES.containsKey(CraftNamespacedKey.toMinecraft(apiKey)));
+ }
+ }
+
+ private static String printMissing(Map<ResourceLocation, Structure> missing) {
+ final StringJoiner joiner = new StringJoiner("\n", "Missing: \n", "");
+
+ missing.forEach((key, configuredFeature) -> {
+ joiner.add("public static final Reference<ConfiguredStructure> " + BUILT_IN_STRUCTURES.get(key) + " = create(\"" + key.getPath() + "\");");
+ });
+
+ return joiner.toString();
+ }
+
+ @AfterClass
+ public static void after() {
+ System.setOut(out);
+ }
+}
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