minecraft-src/net/minecraft/client/gui/screens/worldselection/ExperimentsScreen.java

package net.minecraft.client.gui.screens.worldselection;

import com.google.common.collect.Lists;
import it.unimi.dsi.fastutil.objects.Object2BooleanLinkedOpenHashMap;
import it.unimi.dsi.fastutil.objects.Object2BooleanMap;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.function.Consumer;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.ChatFormatting;
import net.minecraft.client.gui.GuiGraphics;
import net.minecraft.client.gui.components.AbstractContainerWidget;
import net.minecraft.client.gui.components.AbstractWidget;
import net.minecraft.client.gui.components.Button;
import net.minecraft.client.gui.components.MultiLineTextWidget;
import net.minecraft.client.gui.components.events.GuiEventListener;
import net.minecraft.client.gui.layouts.HeaderAndFooterLayout;
import net.minecraft.client.gui.layouts.Layout;
import net.minecraft.client.gui.layouts.LinearLayout;
import net.minecraft.client.gui.narration.NarratableEntry;
import net.minecraft.client.gui.narration.NarrationElementOutput;
import net.minecraft.client.gui.navigation.ScreenDirection;
import net.minecraft.client.gui.navigation.ScreenRectangle;
import net.minecraft.client.gui.screens.Screen;
import net.minecraft.client.gui.screens.worldselection.SwitchGrid.Builder;
import net.minecraft.client.resources.language.I18n;
import net.minecraft.network.chat.CommonComponents;
import net.minecraft.network.chat.Component;
import net.minecraft.server.packs.repository.Pack;
import net.minecraft.server.packs.repository.PackRepository;
import net.minecraft.server.packs.repository.PackSource;
import org.jetbrains.annotations.Nullable;

@Environment(EnvType.CLIENT)
public class ExperimentsScreen extends Screen {
	private static final Component TITLE = Component.translatable("selectWorld.experiments");
	private static final Component INFO = Component.translatable("selectWorld.experiments.info").withStyle(ChatFormatting.RED);
	private static final int MAIN_CONTENT_WIDTH = 310;
	private static final int SCROLL_AREA_MIN_HEIGHT = 130;
	private final HeaderAndFooterLayout layout = new HeaderAndFooterLayout(this);
	private final Screen parent;
	private final PackRepository packRepository;
	private final Consumer<PackRepository> output;
	private final Object2BooleanMap<Pack> packs = new Object2BooleanLinkedOpenHashMap<>();
	@Nullable
	private ExperimentsScreen.ScrollArea scrollArea;

	public ExperimentsScreen(Screen parent, PackRepository packRepository, Consumer<PackRepository> output) {
		super(TITLE);
		this.parent = parent;
		this.packRepository = packRepository;
		this.output = output;

		for (Pack pack : packRepository.getAvailablePacks()) {
			if (pack.getPackSource() == PackSource.FEATURE) {
				this.packs.put(pack, packRepository.getSelectedPacks().contains(pack));
			}
		}
	}

	@Override
	protected void init() {
		this.layout.addTitleHeader(TITLE, this.font);
		LinearLayout linearLayout = this.layout.addToContents(LinearLayout.vertical());
		linearLayout.addChild(new MultiLineTextWidget(INFO, this.font).setMaxWidth(310), layoutSettings -> layoutSettings.paddingBottom(15));
		Builder builder = SwitchGrid.builder(299).withInfoUnderneath(2, true).withRowSpacing(4);
		this.packs
			.forEach(
				(pack, boolean_) -> builder.addSwitch(
						getHumanReadableTitle(pack), () -> this.packs.getBoolean(pack), boolean_x -> this.packs.put(pack, boolean_x.booleanValue())
					)
					.withInfo(pack.getDescription())
			);
		Layout layout = builder.build().layout();
		this.scrollArea = new ExperimentsScreen.ScrollArea(layout, 310, 130);
		linearLayout.addChild(this.scrollArea);
		LinearLayout linearLayout2 = this.layout.addToFooter(LinearLayout.horizontal().spacing(8));
		linearLayout2.addChild(Button.builder(CommonComponents.GUI_DONE, button -> this.onDone()).build());
		linearLayout2.addChild(Button.builder(CommonComponents.GUI_CANCEL, button -> this.onClose()).build());
		this.layout.visitWidgets(guiEventListener -> {
			AbstractWidget var10000 = this.addRenderableWidget(guiEventListener);
		});
		this.repositionElements();
	}

	private static Component getHumanReadableTitle(Pack pack) {
		String string = "dataPack." + pack.getId() + ".name";
		return (Component)(I18n.exists(string) ? Component.translatable(string) : pack.getTitle());
	}

	@Override
	protected void repositionElements() {
		this.scrollArea.setHeight(130);
		this.layout.arrangeElements();
		int i = this.height - this.layout.getFooterHeight() - this.scrollArea.getRectangle().bottom();
		this.scrollArea.setHeight(this.scrollArea.getHeight() + i);
		this.scrollArea.refreshScrollAmount();
	}

	@Override
	public Component getNarrationMessage() {
		return CommonComponents.joinForNarration(super.getNarrationMessage(), INFO);
	}

	@Override
	public void onClose() {
		this.minecraft.setScreen(this.parent);
	}

	private void onDone() {
		List<Pack> list = new ArrayList(this.packRepository.getSelectedPacks());
		List<Pack> list2 = new ArrayList();
		this.packs.forEach((pack, boolean_) -> {
			list.remove(pack);
			if (boolean_) {
				list2.add(pack);
			}
		});
		list.addAll(Lists.reverse(list2));
		this.packRepository.setSelected(list.stream().map(Pack::getId).toList());
		this.output.accept(this.packRepository);
	}

	@Environment(EnvType.CLIENT)
	public class ScrollArea extends AbstractContainerWidget {
		private final List<AbstractWidget> children = new ArrayList();
		private final Layout layout;

		public ScrollArea(final Layout layout, final int width, final int height) {
			super(0, 0, width, height, CommonComponents.EMPTY);
			this.layout = layout;
			layout.visitWidgets(this::addWidget);
		}

		public void addWidget(AbstractWidget widget) {
			this.children.add(widget);
		}

		@Override
		protected int contentHeight() {
			return this.layout.getHeight();
		}

		@Override
		protected double scrollRate() {
			return 10.0;
		}

		@Override
		protected void renderWidget(GuiGraphics guiGraphics, int mouseX, int mouseY, float partialTick) {
			guiGraphics.enableScissor(this.getX(), this.getY(), this.getX() + this.width, this.getY() + this.height);
			guiGraphics.pose().pushPose();
			guiGraphics.pose().translate(0.0, -this.scrollAmount(), 0.0);

			for (AbstractWidget abstractWidget : this.children) {
				abstractWidget.render(guiGraphics, mouseX, mouseY, partialTick);
			}

			guiGraphics.pose().popPose();
			guiGraphics.disableScissor();
			this.renderScrollbar(guiGraphics);
		}

		@Override
		protected void updateWidgetNarration(NarrationElementOutput narrationElementOutput) {
		}

		@Override
		public ScreenRectangle getBorderForArrowNavigation(ScreenDirection direction) {
			return new ScreenRectangle(this.getX(), this.getY(), this.width, this.contentHeight());
		}

		@Override
		public void setFocused(@Nullable GuiEventListener focused) {
			super.setFocused(focused);
			if (focused != null) {
				ScreenRectangle screenRectangle = this.getRectangle();
				ScreenRectangle screenRectangle2 = focused.getRectangle();
				int i = (int)(screenRectangle2.top() - this.scrollAmount() - screenRectangle.top());
				int j = (int)(screenRectangle2.bottom() - this.scrollAmount() - screenRectangle.bottom());
				if (i < 0) {
					this.setScrollAmount(this.scrollAmount() + i - 14.0);
				} else if (j > 0) {
					this.setScrollAmount(this.scrollAmount() + j + 14.0);
				}
			}
		}

		@Override
		public List<? extends GuiEventListener> children() {
			return this.children;
		}

		@Override
		public void setX(int x) {
			super.setX(x);
			this.layout.setX(x);
			this.layout.arrangeElements();
		}

		@Override
		public void setY(int y) {
			super.setY(y);
			this.layout.setY(y);
			this.layout.arrangeElements();
		}

		@Override
		public Collection<? extends NarratableEntry> getNarratables() {
			return this.children;
		}
	}
}