minecraft-src/net/minecraft/network/chat/ComponentUtils.java

package net.minecraft.network.chat;

import com.google.common.collect.Lists;
import com.mojang.brigadier.Message;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import com.mojang.datafixers.DataFixUtils;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.function.Function;
import net.minecraft.ChatFormatting;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.locale.Language;
import net.minecraft.network.chat.contents.TranslatableContents;
import net.minecraft.world.entity.Entity;
import org.jetbrains.annotations.Nullable;

public class ComponentUtils {
	public static final String DEFAULT_SEPARATOR_TEXT = ", ";
	public static final Component DEFAULT_SEPARATOR = Component.literal(", ").withStyle(ChatFormatting.GRAY);
	public static final Component DEFAULT_NO_STYLE_SEPARATOR = Component.literal(", ");

	/**
	 * Merge the component's styles with the given Style.
	 */
	public static MutableComponent mergeStyles(MutableComponent component, Style style) {
		if (style.isEmpty()) {
			return component;
		} else {
			Style style2 = component.getStyle();
			if (style2.isEmpty()) {
				return component.setStyle(style);
			} else {
				return style2.equals(style) ? component : component.setStyle(style2.applyTo(style));
			}
		}
	}

	public static Optional<MutableComponent> updateForEntity(
		@Nullable CommandSourceStack commandSourceStack, Optional<Component> optionalComponent, @Nullable Entity entity, int recursionDepth
	) throws CommandSyntaxException {
		return optionalComponent.isPresent()
			? Optional.of(updateForEntity(commandSourceStack, (Component)optionalComponent.get(), entity, recursionDepth))
			: Optional.empty();
	}

	public static MutableComponent updateForEntity(
		@Nullable CommandSourceStack commandSourceStack, Component component, @Nullable Entity entity, int recursionDepth
	) throws CommandSyntaxException {
		if (recursionDepth > 100) {
			return component.copy();
		} else {
			MutableComponent mutableComponent = component.getContents().resolve(commandSourceStack, entity, recursionDepth + 1);

			for (Component component2 : component.getSiblings()) {
				mutableComponent.append(updateForEntity(commandSourceStack, component2, entity, recursionDepth + 1));
			}

			return mutableComponent.withStyle(resolveStyle(commandSourceStack, component.getStyle(), entity, recursionDepth));
		}
	}

	private static Style resolveStyle(@Nullable CommandSourceStack commandSourceStack, Style style, @Nullable Entity entity, int recursionDepth) throws CommandSyntaxException {
		if (style.getHoverEvent() instanceof HoverEvent.ShowText(Component hoverEvent2)) {
			HoverEvent hoverEvent2x = new HoverEvent.ShowText(updateForEntity(commandSourceStack, hoverEvent2, entity, recursionDepth + 1));
			return style.withHoverEvent(hoverEvent2x);
		} else {
			return style;
		}
	}

	public static Component formatList(Collection<String> elements) {
		return formatAndSortList(elements, string -> Component.literal(string).withStyle(ChatFormatting.GREEN));
	}

	public static <T extends Comparable<T>> Component formatAndSortList(Collection<T> elements, Function<T, Component> componentExtractor) {
		if (elements.isEmpty()) {
			return CommonComponents.EMPTY;
		} else if (elements.size() == 1) {
			return (Component)componentExtractor.apply((Comparable)elements.iterator().next());
		} else {
			List<T> list = Lists.<T>newArrayList(elements);
			list.sort(Comparable::compareTo);
			return formatList(list, componentExtractor);
		}
	}

	public static <T> Component formatList(Collection<? extends T> elements, Function<T, Component> componentExtractor) {
		return formatList(elements, DEFAULT_SEPARATOR, componentExtractor);
	}

	public static <T> MutableComponent formatList(
		Collection<? extends T> elements, Optional<? extends Component> optionalSeparator, Function<T, Component> componentExtractor
	) {
		return formatList(elements, DataFixUtils.orElse(optionalSeparator, DEFAULT_SEPARATOR), componentExtractor);
	}

	public static Component formatList(Collection<? extends Component> elements, Component separator) {
		return formatList(elements, separator, Function.identity());
	}

	public static <T> MutableComponent formatList(Collection<? extends T> elements, Component separator, Function<T, Component> componentExtractor) {
		if (elements.isEmpty()) {
			return Component.empty();
		} else if (elements.size() == 1) {
			return ((Component)componentExtractor.apply(elements.iterator().next())).copy();
		} else {
			MutableComponent mutableComponent = Component.empty();
			boolean bl = true;

			for (T object : elements) {
				if (!bl) {
					mutableComponent.append(separator);
				}

				mutableComponent.append((Component)componentExtractor.apply(object));
				bl = false;
			}

			return mutableComponent;
		}
	}

	/**
	 * Wraps the text with square brackets.
	 */
	public static MutableComponent wrapInSquareBrackets(Component toWrap) {
		return Component.translatable("chat.square_brackets", toWrap);
	}

	public static Component fromMessage(Message message) {
		return (Component)(message instanceof Component component ? component : Component.literal(message.getString()));
	}

	public static boolean isTranslationResolvable(@Nullable Component component) {
		if (component != null && component.getContents() instanceof TranslatableContents translatableContents) {
			String string = translatableContents.getKey();
			String string2 = translatableContents.getFallback();
			return string2 != null || Language.getInstance().has(string);
		} else {
			return true;
		}
	}

	public static MutableComponent copyOnClickText(String text) {
		return wrapInSquareBrackets(
			Component.literal(text)
				.withStyle(
					style -> style.withColor(ChatFormatting.GREEN)
						.withClickEvent(new ClickEvent.CopyToClipboard(text))
						.withHoverEvent(new HoverEvent.ShowText(Component.translatable("chat.copy.click")))
						.withInsertion(text)
				)
		);
	}
}