diff --git a/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/api/command/v2/EntitySelectorOptionRegistry.java b/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/api/command/v2/EntitySelectorOptionRegistry.java
new file mode 100644
index 000000000..01caa7e47
--- /dev/null
+++ b/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/api/command/v2/EntitySelectorOptionRegistry.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.api.command.v2;
+
+import java.util.function.Predicate;
+
+import net.minecraft.command.EntitySelectorOptions;
+import net.minecraft.command.EntitySelectorReader;
+import net.minecraft.text.Text;
+import net.minecraft.util.Identifier;
+
+import net.fabricmc.fabric.mixin.command.EntitySelectorOptionsAccessor;
+
+/**
+ * Contains a function to register an entity selector option.
+ */
+public final class EntitySelectorOptionRegistry {
+ private EntitySelectorOptionRegistry() {
+ }
+
+ /**
+ * Registers an entity selector option. The added option is available under the underscore
+ * separated ID.
+ *
+ * <p>Here's an example of a custom entity selector option. The option is registered under
+ * {@code example_min_health} and can be used like {@code @e[example_min_health=5]}.
+ * <pre>{@code
+ * EntitySelectorOptionRegistry.register(
+ * new Identifier("example", "min_health"),
+ * Text.literal("Minimum entity health"),
+ * (reader) -> {
+ * final float minHealth = reader.getReader().readFloat();
+ *
+ * if (minHealth > 0) {
+ * reader.setPredicate((entity) -> entity instanceof LivingEntity livingEntity && livingEntity.getHealth() >= minHealth);
+ * }
+ * },
+ * (reader) -> true
+ * );
+ * }</pre>
+ *
+ * <p>By default, a selector option can be used multiple times. To make a non-repeatable
+ * option, either use {@link FabricEntitySelectorReader} to flag the existence of an option
+ * and check it inside {@code canUse}, or use {@link #registerNonRepeatable} instead of this
+ * method.
+ *
+ * @param id the ID of the option
+ * @param description the description of the option
+ * @param handler the handler for the entity option that reads and sets the predicate
+ * @param canUse the predicate that checks whether the option is syntactically valid
+ */
+ public static void register(Identifier id, Text description, EntitySelectorOptions.SelectorHandler handler, Predicate<EntitySelectorReader> canUse) {
+ EntitySelectorOptionsAccessor.callPutOption(id.toUnderscoreSeparatedString(), handler, canUse, description);
+ }
+
+ /**
+ * Registers an entity selector option. The added option is available under the underscore
+ * separated ID. The added option cannot be used multiple times within a single selector.
+ *
+ * @param id the ID of the option
+ * @param description the description of the option
+ * @param handler the handler for the entity option that reads and sets the predicate
+ */
+ public static void registerNonRepeatable(Identifier id, Text description, EntitySelectorOptions.SelectorHandler handler) {
+ register(id, description, (reader) -> {
+ handler.handle(reader);
+ reader.setCustomFlag(id, true);
+ }, (reader) -> !reader.getCustomFlag(id)); // has a flag = used before
+ }
+}
diff --git a/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/api/command/v2/FabricEntitySelectorReader.java b/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/api/command/v2/FabricEntitySelectorReader.java
new file mode 100644
index 000000000..1462c1a47
--- /dev/null
+++ b/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/api/command/v2/FabricEntitySelectorReader.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.api.command.v2;
+
+import net.minecraft.util.Identifier;
+
+/**
+ * Fabric extension to {@link net.minecraft.command.EntitySelectorReader}, implemented
+ * using interface injection. This allows custom entity selectors to
+ * set a custom flag to a reader. This can be used to implement mutually-exclusive
+ * or non-repeatable entity selector option.
+ */
+public interface FabricEntitySelectorReader {
+ /**
+ * Sets a flag.
+ * @param key the key of the flag
+ * @param value the value of the flag
+ */
+ default void setCustomFlag(Identifier key, boolean value) {
+ throw new UnsupportedOperationException("Implemented via mixin");
+ }
+
+ /**
+ * Gets the value of the flag.
+ * @param key the key of the flag
+ * @return the value, or {@code false} if the flag is not set
+ */
+ default boolean getCustomFlag(Identifier key) {
+ throw new UnsupportedOperationException("Implemented via mixin");
+ }
+}
diff --git a/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/mixin/command/EntitySelectorOptionsAccessor.java b/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/mixin/command/EntitySelectorOptionsAccessor.java
new file mode 100644
index 000000000..ccaee74a2
--- /dev/null
+++ b/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/mixin/command/EntitySelectorOptionsAccessor.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.mixin.command;
+
+import java.util.function.Predicate;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+import net.minecraft.command.EntitySelectorOptions;
+import net.minecraft.command.EntitySelectorReader;
+import net.minecraft.text.Text;
+
+@Mixin(EntitySelectorOptions.class)
+public interface EntitySelectorOptionsAccessor {
+ @Invoker
+ static void callPutOption(String id, EntitySelectorOptions.SelectorHandler handler, Predicate<EntitySelectorReader> condition, Text description) {
+ }
+}
diff --git a/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/mixin/command/EntitySelectorReaderMixin.java b/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/mixin/command/EntitySelectorReaderMixin.java
new file mode 100644
index 000000000..3cb8f8ed9
--- /dev/null
+++ b/fabric-command-api-v2/src/main/java/net/fabricmc/fabric/mixin/command/EntitySelectorReaderMixin.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.mixin.command;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+
+import net.minecraft.command.EntitySelectorReader;
+import net.minecraft.util.Identifier;
+
+import net.fabricmc.fabric.api.command.v2.FabricEntitySelectorReader;
+
+@Mixin(EntitySelectorReader.class)
+public class EntitySelectorReaderMixin implements FabricEntitySelectorReader {
+ @Unique
+ private final Set<Identifier> flags = new HashSet<>();
+
+ @Override
+ public void setCustomFlag(Identifier key, boolean value) {
+ if (value) {
+ this.flags.add(key);
+ } else {
+ this.flags.remove(key);
+ }
+ }
+
+ @Override
+ public boolean getCustomFlag(Identifier key) {
+ return this.flags.contains(key);
+ }
+}
diff --git a/fabric-command-api-v2/src/main/resources/fabric-command-api-v2.mixins.json b/fabric-command-api-v2/src/main/resources/fabric-command-api-v2.mixins.json
index f011f37c1..0117a3d14 100644
--- a/fabric-command-api-v2/src/main/resources/fabric-command-api-v2.mixins.json
+++ b/fabric-command-api-v2/src/main/resources/fabric-command-api-v2.mixins.json
@@ -5,6 +5,8 @@
"mixins": [
"ArgumentTypesAccessor",
"CommandManagerMixin",
+ "EntitySelectorOptionsAccessor",
+ "EntitySelectorReaderMixin",
"HelpCommandAccessor"
],
"injectors": {
diff --git a/fabric-command-api-v2/src/main/resources/fabric.mod.json b/fabric-command-api-v2/src/main/resources/fabric.mod.json
index 8c2eaac2a..fdda5fe2a 100644
--- a/fabric-command-api-v2/src/main/resources/fabric.mod.json
+++ b/fabric-command-api-v2/src/main/resources/fabric.mod.json
@@ -30,6 +30,9 @@
}
],
"custom": {
- "fabric-api:module-lifecycle": "stable"
+ "fabric-api:module-lifecycle": "stable",
+ "loom:injected_interfaces": {
+ "net/minecraft/class_2303": ["net/fabricmc/fabric/api/command/v2/FabricEntitySelectorReader"]
+ }
}
}
diff --git a/fabric-command-api-v2/src/testmod/java/net/fabricmc/fabric/test/command/CommandTest.java b/fabric-command-api-v2/src/testmod/java/net/fabricmc/fabric/test/command/CommandTest.java
index ced6318bc..748ad298c 100644
--- a/fabric-command-api-v2/src/testmod/java/net/fabricmc/fabric/test/command/CommandTest.java
+++ b/fabric-command-api-v2/src/testmod/java/net/fabricmc/fabric/test/command/CommandTest.java
@@ -26,15 +26,19 @@ import com.mojang.brigadier.tree.RootCommandNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
+import net.minecraft.entity.LivingEntity;
import net.minecraft.server.command.ServerCommandSource;
import net.minecraft.text.Text;
+import net.minecraft.util.Identifier;
import net.fabricmc.api.ModInitializer;
import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
+import net.fabricmc.fabric.api.command.v2.EntitySelectorOptionRegistry;
import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
public final class CommandTest implements ModInitializer {
private static final Logger LOGGER = LoggerFactory.getLogger(CommandTest.class);
+ static final Identifier SELECTOR_ID = new Identifier("fabric-command-api-v2-testmod", "min_health");
private static final SimpleCommandExceptionType WRONG_SIDE_SHOULD_BE_INTEGRATED = new SimpleCommandExceptionType(Text.literal("This command was registered incorrectly. Should only be present on an integrated server but was ran on a dedicated server!"));
private static final SimpleCommandExceptionType WRONG_SIDE_SHOULD_BE_DEDICATED = new SimpleCommandExceptionType(Text.literal("This command was registered incorrectly. Should only be present on an dedicated server but was ran on an integrated server!"));
@@ -50,7 +54,7 @@ public final class CommandTest implements ModInitializer {
}
if (environment.integrated) {
- // The command here should only be present on a integrated server
+ // The command here should only be present on an integrated server
dispatcher.register(literal("fabric_integrated_test_command").executes(this::executeIntegratedCommand));
}
});
@@ -95,6 +99,18 @@ public final class CommandTest implements ModInitializer {
// Success!
CommandTest.LOGGER.info("The command tests have passed! Please make sure you execute the three commands for extra safety.");
});
+
+ EntitySelectorOptionRegistry.registerNonRepeatable(
+ SELECTOR_ID,
+ Text.literal("Minimum entity health"),
+ (reader) -> {
+ final float minHealth = reader.getReader().readFloat();
+
+ if (minHealth > 0) {
+ reader.setPredicate((entity) -> entity instanceof LivingEntity livingEntity && livingEntity.getHealth() >= minHealth);
+ }
+ }
+ );
}
private int executeCommonCommand(CommandContext<ServerCommandSource> context) {
diff --git a/fabric-command-api-v2/src/testmod/java/net/fabricmc/fabric/test/command/EntitySelectorGameTest.java b/fabric-command-api-v2/src/testmod/java/net/fabricmc/fabric/test/command/EntitySelectorGameTest.java
new file mode 100644
index 000000000..a0bcbdf20
--- /dev/null
+++ b/fabric-command-api-v2/src/testmod/java/net/fabricmc/fabric/test/command/EntitySelectorGameTest.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.test.command;
+
+import java.util.Locale;
+
+import net.minecraft.entity.EntityType;
+import net.minecraft.entity.mob.MobEntity;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.test.GameTest;
+import net.minecraft.test.TestContext;
+import net.minecraft.util.math.BlockPos;
+
+import net.fabricmc.fabric.api.gametest.v1.FabricGameTest;
+
+public class EntitySelectorGameTest {
+ private void spawn(TestContext context, float health) {
+ MobEntity entity = context.spawnMob(EntityType.CREEPER, BlockPos.ORIGIN);
+ entity.setAiDisabled(true);
+ entity.setHealth(health);
+ }
+
+ @GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE)
+ public void testEntitySelector(TestContext context) {
+ BlockPos absolute = context.getAbsolutePos(BlockPos.ORIGIN);
+
+ spawn(context, 1.0f);
+ spawn(context, 5.0f);
+ spawn(context, 10.0f);
+
+ String command = String.format(
+ Locale.ROOT,
+ "/kill @e[x=%d, y=%d, z=%d, distance=..2, %s=5.0]",
+ absolute.getX(),
+ absolute.getY(),
+ absolute.getZ(),
+ CommandTest.SELECTOR_ID.toUnderscoreSeparatedString()
+ );
+
+ context.expectEntitiesAround(EntityType.CREEPER, BlockPos.ORIGIN, 3, 2.0);
+ MinecraftServer server = context.getWorld().getServer();
+ int result = server.getCommandManager().executeWithPrefix(server.getCommandSource(), command);
+ context.assertTrue(result == 2, "Expected 2 entities killed, got " + result);
+ context.expectEntitiesAround(EntityType.CREEPER, BlockPos.ORIGIN, 1, 2.0);
+ context.complete();
+ }
+}
diff --git a/fabric-command-api-v2/src/testmod/resources/fabric.mod.json b/fabric-command-api-v2/src/testmod/resources/fabric.mod.json
index 1acfc5897..3c9bfda09 100644
--- a/fabric-command-api-v2/src/testmod/resources/fabric.mod.json
+++ b/fabric-command-api-v2/src/testmod/resources/fabric.mod.json
@@ -15,6 +15,9 @@
],
"client": [
"net.fabricmc.fabric.test.command.client.ClientCommandTest"
+ ],
+ "fabric-gametest": [
+ "net.fabricmc.fabric.test.command.EntitySelectorGameTest"
]
}
}