minecraft-src/net/minecraft/client/gui/screens/AccessibilityOnboardingScreen.java

package net.minecraft.client.gui.screens;

import com.mojang.text2speech.Narrator;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.Util;
import net.minecraft.client.Minecraft;
import net.minecraft.client.Options;
import net.minecraft.client.gui.GuiGraphics;
import net.minecraft.client.gui.components.Button;
import net.minecraft.client.gui.components.CommonButtons;
import net.minecraft.client.gui.components.CycleButton;
import net.minecraft.client.gui.components.FocusableTextWidget;
import net.minecraft.client.gui.components.LogoRenderer;
import net.minecraft.client.gui.layouts.HeaderAndFooterLayout;
import net.minecraft.client.gui.layouts.LinearLayout;
import net.minecraft.client.gui.screens.options.AccessibilityOptionsScreen;
import net.minecraft.client.gui.screens.options.LanguageSelectScreen;
import net.minecraft.network.chat.CommonComponents;
import net.minecraft.network.chat.Component;
import net.minecraft.util.Mth;
import org.jetbrains.annotations.Nullable;

@Environment(EnvType.CLIENT)
public class AccessibilityOnboardingScreen extends Screen {
	private static final Component TITLE = Component.translatable("accessibility.onboarding.screen.title");
	private static final Component ONBOARDING_NARRATOR_MESSAGE = Component.translatable("accessibility.onboarding.screen.narrator");
	private static final int PADDING = 4;
	private static final int TITLE_PADDING = 16;
	private static final float FADE_OUT_TIME = 1000.0F;
	private final LogoRenderer logoRenderer;
	private final Options options;
	private final boolean narratorAvailable;
	private boolean hasNarrated;
	private float timer;
	private final Runnable onClose;
	@Nullable
	private FocusableTextWidget textWidget;
	private final HeaderAndFooterLayout layout = new HeaderAndFooterLayout(this, this.initTitleYPos(), 33);
	private float fadeInStart;
	private boolean fadingIn = true;
	private float fadeOutStart;

	public AccessibilityOnboardingScreen(Options options, Runnable onClose) {
		super(TITLE);
		this.options = options;
		this.onClose = onClose;
		this.logoRenderer = new LogoRenderer(true);
		this.narratorAvailable = Minecraft.getInstance().getNarrator().isActive();
	}

	@Override
	public void init() {
		LinearLayout linearLayout = this.layout.addToContents(LinearLayout.vertical());
		linearLayout.defaultCellSetting().alignHorizontallyCenter().padding(4);
		this.textWidget = linearLayout.addChild(new FocusableTextWidget(this.width, this.title, this.font), layoutSettings -> layoutSettings.padding(8));
		if (this.options.narrator().createButton(this.options) instanceof CycleButton cycleButton) {
			this.narratorButton = cycleButton;
			this.narratorButton.active = this.narratorAvailable;
			linearLayout.addChild(this.narratorButton);
		}

		linearLayout.addChild(CommonButtons.accessibility(150, button -> this.closeAndSetScreen(new AccessibilityOptionsScreen(this, this.minecraft.options)), false));
		linearLayout.addChild(
			CommonButtons.language(
				150, button -> this.closeAndSetScreen(new LanguageSelectScreen(this, this.minecraft.options, this.minecraft.getLanguageManager())), false
			)
		);
		this.layout.addToFooter(Button.builder(CommonComponents.GUI_CONTINUE, button -> this.onClose()).build());
		this.layout.visitWidgets(this::addRenderableWidget);
		this.repositionElements();
	}

	@Override
	protected void repositionElements() {
		if (this.textWidget != null) {
			this.textWidget.containWithin(this.width);
		}

		this.layout.arrangeElements();
	}

	@Override
	protected void setInitialFocus() {
		if (this.narratorAvailable && this.narratorButton != null) {
			this.setInitialFocus(this.narratorButton);
		} else {
			super.setInitialFocus();
		}
	}

	private int initTitleYPos() {
		return 90;
	}

	@Override
	public void onClose() {
		this.fadeOutStart = (float)Util.getMillis();
	}

	private void closeAndSetScreen(Screen screen) {
		this.close(false, () -> this.minecraft.setScreen(screen));
	}

	private void close(boolean markAsFinished, Runnable onClose) {
		if (markAsFinished) {
			this.options.onboardingAccessibilityFinished();
		}

		Narrator.getNarrator().clear();
		onClose.run();
	}

	@Override
	public void render(GuiGraphics guiGraphics, int mouseX, int mouseY, float partialTick) {
		super.render(guiGraphics, mouseX, mouseY, partialTick);
		this.handleInitialNarrationDelay();
		if (this.fadeInStart == 0.0F && this.fadingIn) {
			this.fadeInStart = (float)Util.getMillis();
		}

		if (this.fadeInStart > 0.0F) {
			float f = ((float)Util.getMillis() - this.fadeInStart) / 2000.0F;
			float g = 1.0F;
			if (f >= 1.0F) {
				this.fadingIn = false;
				this.fadeInStart = 0.0F;
			} else {
				f = Mth.clamp(f, 0.0F, 1.0F);
				g = Mth.clampedMap(f, 0.5F, 1.0F, 0.0F, 1.0F);
			}

			this.fadeWidgets(g);
		}

		if (this.fadeOutStart > 0.0F) {
			float f = 1.0F - ((float)Util.getMillis() - this.fadeOutStart) / 1000.0F;
			float g = 0.0F;
			if (f <= 0.0F) {
				this.fadeOutStart = 0.0F;
				this.close(true, this.onClose);
			} else {
				f = Mth.clamp(f, 0.0F, 1.0F);
				g = Mth.clampedMap(f, 0.5F, 1.0F, 0.0F, 1.0F);
			}

			this.fadeWidgets(g);
		}

		this.logoRenderer.renderLogo(guiGraphics, this.width, 1.0F);
	}

	@Override
	protected void renderPanorama(GuiGraphics guiGraphics, float partialTick) {
		this.minecraft.gameRenderer.getPanorama().render(guiGraphics, this.width, this.height, false);
	}

	private void handleInitialNarrationDelay() {
		if (!this.hasNarrated && this.narratorAvailable) {
			if (this.timer < 40.0F) {
				this.timer++;
			} else if (this.minecraft.isWindowActive()) {
				Narrator.getNarrator().say(ONBOARDING_NARRATOR_MESSAGE.getString(), true, 1.0F);
				this.hasNarrated = true;
			}
		}
	}
}