Code/net/minecraft/client/gui/layouts/HeaderAndFooterLayout.java

package net.minecraft.client.gui.layouts;

import java.util.function.Consumer;
import net.minecraft.client.gui.Font;
import net.minecraft.client.gui.components.StringWidget;
import net.minecraft.client.gui.screens.Screen;
import net.minecraft.network.chat.Component;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class HeaderAndFooterLayout implements Layout {
    public static final int DEFAULT_HEADER_AND_FOOTER_HEIGHT = 33;
    private static final int CONTENT_MARGIN_TOP = 30;
    private final FrameLayout headerFrame = new FrameLayout();
    private final FrameLayout footerFrame = new FrameLayout();
    private final FrameLayout contentsFrame = new FrameLayout();
    private final Screen screen;
    private int headerHeight;
    private int footerHeight;

    public HeaderAndFooterLayout(Screen p_270234_) {
        this(p_270234_, 33);
    }

    public HeaderAndFooterLayout(Screen p_270404_, int p_270984_) {
        this(p_270404_, p_270984_, p_270984_);
    }

    public HeaderAndFooterLayout(Screen p_270083_, int p_270134_, int p_270996_) {
        this.screen = p_270083_;
        this.headerHeight = p_270134_;
        this.footerHeight = p_270996_;
        this.headerFrame.defaultChildLayoutSetting().align(0.5F, 0.5F);
        this.footerFrame.defaultChildLayoutSetting().align(0.5F, 0.5F);
    }

    @Override
    public void setX(int p_270309_) {
    }

    @Override
    public void setY(int p_270318_) {
    }

    @Override
    public int getX() {
        return 0;
    }

    @Override
    public int getY() {
        return 0;
    }

    @Override
    public int getWidth() {
        return this.screen.width;
    }

    @Override
    public int getHeight() {
        return this.screen.height;
    }

    public int getFooterHeight() {
        return this.footerHeight;
    }

    public void setFooterHeight(int p_270260_) {
        this.footerHeight = p_270260_;
    }

    public void setHeaderHeight(int p_270135_) {
        this.headerHeight = p_270135_;
    }

    public int getHeaderHeight() {
        return this.headerHeight;
    }

    public int getContentHeight() {
        return this.screen.height - this.getHeaderHeight() - this.getFooterHeight();
    }

    @Override
    public void visitChildren(Consumer<LayoutElement> p_270213_) {
        this.headerFrame.visitChildren(p_270213_);
        this.contentsFrame.visitChildren(p_270213_);
        this.footerFrame.visitChildren(p_270213_);
    }

    @Override
    public void arrangeElements() {
        int i = this.getHeaderHeight();
        int j = this.getFooterHeight();
        this.headerFrame.setMinWidth(this.screen.width);
        this.headerFrame.setMinHeight(i);
        this.headerFrame.setPosition(0, 0);
        this.headerFrame.arrangeElements();
        this.footerFrame.setMinWidth(this.screen.width);
        this.footerFrame.setMinHeight(j);
        this.footerFrame.arrangeElements();
        this.footerFrame.setY(this.screen.height - j);
        this.contentsFrame.setMinWidth(this.screen.width);
        this.contentsFrame.arrangeElements();
        int k = i + 30;
        int l = this.screen.height - j - this.contentsFrame.getHeight();
        this.contentsFrame.setPosition(0, Math.min(k, l));
    }

    public <T extends LayoutElement> T addToHeader(T p_270636_) {
        return this.headerFrame.addChild(p_270636_);
    }

    public <T extends LayoutElement> T addToHeader(T p_270870_, Consumer<LayoutSettings> p_300314_) {
        return this.headerFrame.addChild(p_270870_, p_300314_);
    }

    public void addTitleHeader(Component p_330651_, Font p_331722_) {
        this.headerFrame.addChild(new StringWidget(p_330651_, p_331722_));
    }

    public <T extends LayoutElement> T addToFooter(T p_270951_) {
        return this.footerFrame.addChild(p_270951_);
    }

    public <T extends LayoutElement> T addToFooter(T p_270362_, Consumer<LayoutSettings> p_301265_) {
        return this.footerFrame.addChild(p_270362_, p_301265_);
    }

    public <T extends LayoutElement> T addToContents(T p_270895_) {
        return this.contentsFrame.addChild(p_270895_);
    }

    public <T extends LayoutElement> T addToContents(T p_270611_, Consumer<LayoutSettings> p_299569_) {
        return this.contentsFrame.addChild(p_270611_, p_299569_);
    }
}