// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.aokeyhole.toolkit;

import java.awt.*;

public abstract class BoxedSet
{
    protected BoxedText[] mBoxes = BoxedText.EMPTY_ARRAY;

    private View mView = ViewNull.INSTANCE;

    public int size()
    {
        return mBoxes.length;
    }

    public void draw( Graphics pGraphics )
    {
        for ( BoxedText box : mBoxes )
        {
            box.draw( pGraphics );
        }
    }

    public boolean remove( int pID )
    {
        for ( int i = 0; i < mBoxes.length; i++ )
        {
            if ( mBoxes[i].getID() == pID )
            {
                mBoxes[i].dispose();
                innerRemove( i );
                setChanged();
                return true;
            }
        }
        return false;
    }

    public BoxedText add( BoxedText pNew )
    {
        if ( pNew != null )
        {
            innerAdd( pNew );
            setChanged();
        }
        return pNew;
    }

    public void setView( View pView )
    {
        mView = (pView != null) ? pView : ViewNull.INSTANCE;
    }

    public void setChanged()
    {
        mView.update();
    }

    public BoxedText[] getBoxes()
    {
        return mBoxes;
    }

    public BoxedText getLastBox()
    {
        return (mBoxes.length == 0) ? null : mBoxes[mBoxes.length - 1];
    }

    public void dispose()
    {
        for ( BoxedText box : mBoxes )
        {
            box.dispose();
        }
        mBoxes = BoxedText.EMPTY_ARRAY;
        mView = ViewNull.INSTANCE;
    }

    protected void innerAdd( BoxedText pNew )
    {
        BoxedText[] extended = new BoxedText[mBoxes.length + 1];
        System.arraycopy( mBoxes, 0, extended, 0, mBoxes.length );
        extended[mBoxes.length] = pNew;
        mBoxes = extended;
    }

    private void innerRemove( int pIndex )
    {
        BoxedText[] shrunk = new BoxedText[mBoxes.length - 1];
        if ( pIndex != 0 ) // Not First
        {
            System.arraycopy( mBoxes, 0, shrunk, 0, pIndex );
        }
        if ( pIndex != mBoxes.length - 1 ) // Not Last
        {
            System.arraycopy( mBoxes, pIndex + 1, shrunk, pIndex, shrunk.length - pIndex );
        }
        mBoxes = shrunk;
    }
}