FontFactory.java

/*
 * $Id: FontFactory.java 535 2008-02-19 06:02:50Z weiju $
 * 
 * Created on 2006/02/25
 * Copyright 2005-2008 by Wei-ju Wu
 * This file is part of The Z-machine Preservation Project (ZMPP).
 *
 * ZMPP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ZMPP is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ZMPP.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.zmpp.swingui;

import java.awt.Font;

import org.zmpp.vm.ScreenModel;

/**
 * The FontFactory creates and manages fonts that are requested by the screen
 * model. It manages instances of ScreenFont.
 *
 * @author Wei-ju Wu
 * @version 1.0
 */
public class FontFactory {

    private ScreenFont[][] fonts;

    public FontFactory() {

        fonts = new ScreenFont[4][16];
    }

    public void initialize(Font standardFontRoman, Font fixedFontRoman) {

        fonts[0][0] = new ScreenFont(standardFontRoman, 1, ScreenModel.TEXTSTYLE_ROMAN);
        fonts[3][0] = new ScreenFont(fixedFontRoman, 4, ScreenModel.TEXTSTYLE_ROMAN);
    }

    public ScreenFont getFont(int fontnum) {

        if (fontnum >= 1 && fontnum <= 4) {
            return fonts[fontnum - 1][0];
        }
        return null;
    }

    public ScreenFont getTextStyle(ScreenFont oldfont, int style) {

        return getStyle(oldfont.getNumber(), oldfont.getStyle(), style);
    }

    private ScreenFont getStyle(int fontnum, int oldstyle, int style) {

        if (style == ScreenModel.TEXTSTYLE_ROMAN) {
            return fonts[fontnum - 1][0];
        } else {

            int newstyle = oldstyle | style;
            if (fonts[fontnum - 1][newstyle] == null) {

                deriveFont(fontnum, newstyle);
            }
            return fonts[fontnum - 1][newstyle];
        }
    }

    private void deriveFont(int fontnum, int style) {

        int fontstyle = Font.PLAIN;
        boolean reverse = false;
        Font oldfont = fonts[fontnum - 1][0].getFont();

        // For fixed style fonts
        if (fontnum == 1 && (style & ScreenModel.TEXTSTYLE_FIXED) > 0) {

            oldfont = fonts[3][0].getFont();
        }

        if ((style & ScreenModel.TEXTSTYLE_BOLD) > 0) {
            fontstyle |= Font.BOLD;
        }
        if ((style & ScreenModel.TEXTSTYLE_ITALIC) > 0) {
            fontstyle |= Font.ITALIC;
        }
        if ((style & ScreenModel.TEXTSTYLE_REVERSE_VIDEO) > 0) {
            reverse = true;
        }
        Font newfont = oldfont.deriveFont(fontstyle);
        fonts[fontnum - 1][style] = new ScreenFont(newfont, fontnum, style, reverse);
    }
}