/*
 * Copyright 2015-2024 MicroEJ Corp. All rights reserved.
 * This library is provided in source code for use, modification and test, subject to license terms.
 * Any modification of the source code will break MicroEJ Corp. warranties on the whole library.
 */
package ej.mwt.style.outline;

import ej.annotation.Nullable;
import ej.bon.XMath;
import ej.microui.display.GraphicsContext;
import ej.mwt.util.Outlineable;
import ej.mwt.util.Size;

/**
 * Outline that have the same thickness for all edges.
 * <p>
 * The thickness is stored as a <code>char</code> for heap optimization and therefore cannot exceed <code>65535</code>.
 */
public class UniformOutline implements Outline {

    /**
     * Creates a uniform outline specifying its thickness.
     * <p>
     * The given thickness is clamped between <code>0</code> and <code>Character.MAX_VALUE</code>.
     *
     * @param thickness
     *            the thickness.
     */
    public UniformOutline(int thickness) {
        this.thickness = (char) XMath.limit(thickness, 0, Character.MAX_VALUE);
    }

    /**
     * Gets the thickness.
     *
     * @return the thickness.
     */
    public int getThickness() {
        return this.thickness;
    }

    @Override
    public void apply(Outlineable outlineable) {
        int thickness = this.thickness;
        outlineable.removeOutline(thickness, thickness, thickness, thickness);
    }

    @Override
    public void apply(GraphicsContext g, Size size) {
        int thickness = this.thickness;
        size.removeOutline(thickness, thickness, thickness, thickness);
        g.translate(thickness, thickness);
        g.intersectClip(0, 0, size.getWidth(), size.getHeight());
    }

    @Override
    public boolean equals(@Nullable Object obj) {
        if (obj != null && getClass() == obj.getClass()) {
            UniformOutline outline = (UniformOutline) obj;
            return this.thickness == outline.thickness;
        }
        return false;
    }

    @Override
    public int hashCode() {
        return 19 * this.thickness;
    }
}