Code/net/minecraft/client/gui/screens/GenericWaitingScreen.java

package net.minecraft.client.gui.screens;

import javax.annotation.Nullable;
import net.minecraft.Util;
import net.minecraft.client.gui.GuiGraphics;
import net.minecraft.client.gui.components.Button;
import net.minecraft.client.gui.components.MultiLineLabel;
import net.minecraft.network.chat.CommonComponents;
import net.minecraft.network.chat.Component;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class GenericWaitingScreen extends Screen {
    private static final int TITLE_Y = 80;
    private static final int MESSAGE_Y = 120;
    private static final int MESSAGE_MAX_WIDTH = 360;
    @Nullable
    private final Component messageText;
    private final Component buttonLabel;
    private final Runnable buttonCallback;
    @Nullable
    private MultiLineLabel message;
    private Button button;
    private int disableButtonTicks;

    public static GenericWaitingScreen createWaiting(Component p_240310_, Component p_240311_, Runnable p_240312_) {
        return new GenericWaitingScreen(p_240310_, null, p_240311_, p_240312_, 0);
    }

    public static GenericWaitingScreen createCompleted(Component p_240291_, Component p_240292_, Component p_240293_, Runnable p_240294_) {
        return new GenericWaitingScreen(p_240291_, p_240292_, p_240293_, p_240294_, 20);
    }

    protected GenericWaitingScreen(Component p_240300_, @Nullable Component p_240301_, Component p_240302_, Runnable p_240303_, int p_240304_) {
        super(p_240300_);
        this.messageText = p_240301_;
        this.buttonLabel = p_240302_;
        this.buttonCallback = p_240303_;
        this.disableButtonTicks = p_240304_;
    }

    @Override
    protected void init() {
        super.init();
        if (this.messageText != null) {
            this.message = MultiLineLabel.create(this.font, this.messageText, 360);
        }

        int i = 150;
        int j = 20;
        int k = this.message != null ? this.message.getLineCount() : 1;
        int l = Math.max(k, 5) * 9;
        int i1 = Math.min(120 + l, this.height - 40);
        this.button = this.addRenderableWidget(
            Button.builder(this.buttonLabel, p_239908_ -> this.onClose()).bounds((this.width - 150) / 2, i1, 150, 20).build()
        );
    }

    @Override
    public void tick() {
        if (this.disableButtonTicks > 0) {
            this.disableButtonTicks--;
        }

        this.button.active = this.disableButtonTicks == 0;
    }

    @Override
    public void render(GuiGraphics p_283537_, int p_239719_, int p_239720_, float p_239721_) {
        super.render(p_283537_, p_239719_, p_239720_, p_239721_);
        p_283537_.drawCenteredString(this.font, this.title, this.width / 2, 80, 16777215);
        if (this.message == null) {
            String s = LoadingDotsText.get(Util.getMillis());
            p_283537_.drawCenteredString(this.font, s, this.width / 2, 120, 10526880);
        } else {
            this.message.renderCentered(p_283537_, this.width / 2, 120);
        }
    }

    @Override
    public boolean shouldCloseOnEsc() {
        return this.message != null && this.button.active;
    }

    @Override
    public void onClose() {
        this.buttonCallback.run();
    }

    @Override
    public Component getNarrationMessage() {
        return CommonComponents.joinForNarration(this.title, this.messageText != null ? this.messageText : CommonComponents.EMPTY);
    }
}