SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package net.multiphasicapps.pcftosqf.pcf;

import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import java.util.List;

/**
 * This represents the map of a glyph.
 *
 * @since 2018/11/29
 */
public final class PCFGlyphMap
{
    /** The glyph data. */
    private byte[] _data;
    
    /** String form. */
    private Reference<String> _string;
    
    /**
     * Initializes the glyph map.
     *
     * @param __bm The bytes used to make up the map.
     * @throws NullPointerException On null arguments.
     * @since 2018/11/29
     */
    public PCFGlyphMap(List<Byte> __bm)
        throws NullPointerException
    {
        if (__bm == null)
            throw new NullPointerException("NARG");
        
        // Copy the data
        int n = __bm.size();
        byte[] data = new byte[n];
        for (int i = 0; i < n; i++)
            data[i] = __bm.get(i);
        
        this._data = data;
    }
    
    /**
     * Initializes the glyph map.
     *
     * @param __bm The bytes used to make up the map.
     * @throws NullPointerException On null arguments.
     * @since 2018/11/29
     */
    public PCFGlyphMap(byte[] __bm)
        throws NullPointerException
    {
        if (__bm == null)
            throw new NullPointerException("NARG");
        
        this._data = __bm.clone();
    }
    
    /**
     * Returns a copy of the glyph data.
     *
     * @return The glyph data.
     * @since 2018/11/29
     */
    public final byte[] data()
    {
        return this._data.clone();
    }
    
    /**
     * {@inheritDoc}
     * @since 2018/11/29
     */
    @Override
    public final String toString()
    {
        Reference<String> ref = this._string;
        String rv;
        
        if (ref == null || null == (rv = ref.get()))
        {
            // Setup buffer
            byte[] data = this._data;
            int n = data.length;
            StringBuilder sb = new StringBuilder(16 + (n * 9));
            
            sb.append("glyph[");
            sb.append(n);
            sb.append("]={");
            
            // Build glyph bytes
            for (int i = 0; i < n; i++)
            {
                if (i > 0)
                    sb.append('|');
                for (int j = 7; j >= 0; j--)
                    sb.append(((data[i] & (1 << j)) != 0 ? '#' : '.'));
            }
            
            sb.append("}");
            
            // Done
            this._string = new WeakReference<>((rv = sb.toString()));
        }
        
        return rv;
    }
}