font.java

iText可以制作中文PDF文件的JAVA源程序

/*
 * $Id: Font.java,v 1.66 2002/07/09 10:41:33 blowagie Exp $
 * $Name:  $
 *
 * Copyright 1999, 2000, 2001, 2002 by Bruno Lowagie.
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library 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 Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

package com.lowagie.text;

import java.awt.Color;

import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.markup.MarkupTags;

/**
 * Contains all the specifications of a font: fontfamily, size, style and color.
 * <P>
 * Example:
 * <BLOCKQUOTE><PRE>
 * Paragraph p = new Paragraph("This is a paragraph",
 *               <STRONG>new Font(Font.HELVETICA, 18, Font.BOLDITALIC, new Color(0, 0, 255))</STRONG>);
 * </PRE></BLOCKQUOTE>
 */

public class Font implements Comparable {
    
// static membervariables for the different families
    
/** a possible value of a font family. */
    public static final int COURIER = 0;
    
/** a possible value of a font family. */
    public static final int HELVETICA = 1;
    
/** a possible value of a font family. */
    public static final int TIMES_NEW_ROMAN = 2;
    
/** a possible value of a font family. */
    public static final int SYMBOL = 3;
    
/** a possible value of a font family. */
    public static final int ZAPFDINGBATS = 4;
    
// static membervariables for the different styles
    
/** this is a possible style. */
    public static final int NORMAL		= 0;
    
/** this is a possible style. */
    public static final int BOLD		= 1;
    
/** this is a possible style. */
    public static final int ITALIC		= 2;
    
/** this is a possible style. */
    public static final int UNDERLINE	= 4;
    
/** this is a possible style. */
    public static final int STRIKETHRU	= 8;
    
/** this is a possible style. */
    public static final int BOLDITALIC	= BOLD | ITALIC;
    
// static membervariables
    
/** the value of an undefined attribute. */
    public static final int UNDEFINED = -1;
    
/** the value of the default size. */
    public static final int DEFAULTSIZE = 12;
    
// membervariables
    
/** the value of the fontfamily. */
    private int family = UNDEFINED;
    
/** the value of the fontsize. */
    private float size = UNDEFINED;
    
/** the value of the style. */
    private int style = UNDEFINED;
    
/** the value of the color. */
    private Color color = null;
    
/** the external font */
    private BaseFont baseFont = null;
    
// constructors
    
/**
 * Constructs a Font.
 *
 * @param	family	the family to which this font belongs
 * @param	size	the size of this font
 * @param	style	the style of this font
 * @param	color	the <CODE>Color</CODE> of this font.
 */
    
    public Font(int family, float size, int style, Color color) {
        this.family = family;
        this.size = size;
        this.style = style;
        this.color = color;
    }
    
/**
 * Constructs a Font.
 *
 * @param	bf	    the external font
 * @param	size	the size of this font
 * @param	style	the style of this font
 * @param	color	the <CODE>Color</CODE> of this font.
 */
    
    public Font(BaseFont bf, float size, int style, Color color) {
        this.baseFont = bf;
        this.size = size;
        this.style = style;
        this.color = color;
    }
    
/**
 * Constructs a Font.
 *
 * @param	bf	    the external font
 * @param	size	the size of this font
 * @param	style	the style of this font
 */
    public Font(BaseFont bf, float size, int style) {
        this(bf, size, style, null);
    }
    
/**
 * Constructs a Font.
 *
 * @param	bf	    the external font
 * @param	size	the size of this font
 */
    public Font(BaseFont bf, float size) {
        this(bf, size, UNDEFINED, null);
    }
    
/**
 * Constructs a Font.
 *
 * @param	bf	    the external font
 */
    public Font(BaseFont bf) {
        this(bf, UNDEFINED, UNDEFINED, null);
    }
    
/**
 * Constructs a Font.
 *
 * @param	family	the family to which this font belongs
 * @param	size	the size of this font
 * @param	style	the style of this font
 */
    
    public Font(int family, float size, int style) {
        this(family, size, style, null);
    }
    
/**
 * Constructs a Font.
 *
 * @param	family	the family to which this font belongs
 * @param	size	the size of this font
 */
    
    public Font(int family, float size) {
        this(family, size, UNDEFINED, null);
    }
    
/**
 * Constructs a Font.
 *
 * @param	family	the family to which this font belongs
 */
    
    public Font(int family) {
        this(family, UNDEFINED, UNDEFINED, null);
    }
    
/**
 * Constructs a Font.
 */
    
    public Font() {
        this(UNDEFINED, UNDEFINED, UNDEFINED, null);
    }
    
    // implementation of the Comparable interface
    
/**
 * Compares this <CODE>Font</CODE> with another
 *
 * @param	object	the other <CODE>Font</CODE>
 * @return	a value
 */
    
    public int compareTo(Object object) {
        if (object == null) {
            return -1;
        }
        Font font;
        try {
            font = (Font) object;
            if (baseFont != null && !baseFont.equals(font.getBaseFont())) {
                return -2;
            }
            if (this.family != font.family()) {
                return 1;
            }
            if (this.size != font.size()) {
                return 2;
            }
            if (this.style != font.style()) {
                return 3;
            }
            if (this.color == null) {
                if (font.color == null) {
                    return 0;
                }
                return 4;
            }
            if (font.color == null) {
                return 4;
            }
            if (this.color.equals(font.color())) {
                return 0;
            }
            return 4;
        }
        catch(ClassCastException cce) {
            return -3;
        }
    }
    
    // methods
    
/**
 * Sets the family using a <CODE>String</CODE> ("Courier",
 * "Helvetica", "Times New Roman", "Symbol" or "ZapfDingbats").
 *
 * @param	family		A <CODE>String</CODE> representing a certain font-family.
 */
    
    public void setFamily(String family) {
        this.family = getFamilyIndex(family);
    }
    
/**
 * Translates a <CODE>String</CODE>-value of a certain family
 * into the index that is used for this family in this class.
 *
 * @param	family		A <CODE>String</CODE> representing a certain font-family
 * @return	the corresponding index
 */
    
    public static int getFamilyIndex(String family) {
        if (family.equalsIgnoreCase(FontFactory.COURIER)) {
            return COURIER;