src/game/java/net/minecraft/client/gui/layouts/AbstractLayout.java

package net.minecraft.client.gui.layouts;

import net.minecraft.util.Mth;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public abstract class AbstractLayout implements Layout {
    private int x;
    private int y;
    protected int width;
    protected int height;

    public AbstractLayout(int p_265185_, int p_265789_, int p_265792_, int p_265443_) {
        this.x = p_265185_;
        this.y = p_265789_;
        this.width = p_265792_;
        this.height = p_265443_;
    }

    @Override
    public void setX(int p_265701_) {
        this.visitChildren(p_265043_ -> {
            int i = p_265043_.getX() + (p_265701_ - this.getX());
            p_265043_.setX(i);
        });
        this.x = p_265701_;
    }

    @Override
    public void setY(int p_265155_) {
        this.visitChildren(p_265586_ -> {
            int i = p_265586_.getY() + (p_265155_ - this.getY());
            p_265586_.setY(i);
        });
        this.y = p_265155_;
    }

    @Override
    public int getX() {
        return this.x;
    }

    @Override
    public int getY() {
        return this.y;
    }

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

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

    @OnlyIn(Dist.CLIENT)
    protected abstract static class AbstractChildWrapper {
        public final LayoutElement child;
        public final LayoutSettings.LayoutSettingsImpl layoutSettings;

        protected AbstractChildWrapper(LayoutElement p_265145_, LayoutSettings p_265309_) {
            this.child = p_265145_;
            this.layoutSettings = p_265309_.getExposed();
        }

        public int getHeight() {
            return this.child.getHeight() + this.layoutSettings.paddingTop + this.layoutSettings.paddingBottom;
        }

        public int getWidth() {
            return this.child.getWidth() + this.layoutSettings.paddingLeft + this.layoutSettings.paddingRight;
        }

        public void setX(int p_265766_, int p_265689_) {
            float f = (float)this.layoutSettings.paddingLeft;
            float f1 = (float)(p_265689_ - this.child.getWidth() - this.layoutSettings.paddingRight);
            int i = (int)Mth.lerp(this.layoutSettings.xAlignment, f, f1);
            this.child.setX(i + p_265766_);
        }

        public void setY(int p_265384_, int p_265375_) {
            float f = (float)this.layoutSettings.paddingTop;
            float f1 = (float)(p_265375_ - this.child.getHeight() - this.layoutSettings.paddingBottom);
            int i = Math.round(Mth.lerp(this.layoutSettings.yAlignment, f, f1));
            this.child.setY(i + p_265384_);
        }
    }
}