Initial Commit

iTechSharp/iTextSharp/text/rtf/style/RtfFont.cs

@@ -0,0 +1,730 @@
+using System;
+using System.IO;
+using System.util;
+using iTextSharp.text;
+using iTextSharp.text.rtf;
+using iTextSharp.text.rtf.document;
+/*
+ * $Id: RtfFont.cs,v 1.13 2008/05/16 19:31:11 psoares33 Exp $
+ * 
+ *
+ * Copyright 2001, 2002, 2003, 2004 by Mark Hall
+ *
+ * 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/
+ */
+
+namespace iTextSharp.text.rtf.style {
+
+    /**
+    * The RtfFont class stores one font for an rtf document. It extends Font,
+    * so can be set as a font, to allow adding of fonts with arbitrary names.
+    * BaseFont fontname handling contributed by Craig Fleming. Various fixes
+    * Renaud Michel, Werner Daehn.
+    *
+    * Version: $Id: RtfFont.cs,v 1.13 2008/05/16 19:31:11 psoares33 Exp $
+    * @author Mark Hall (Mark.Hall@mail.room3b.eu)
+    * @author Craig Fleming (rythos@rhana.dhs.org)
+    * @author Renaud Michel (r.michel@immedia.be)
+    * @author Werner Daehn (Werner.Daehn@BusinessObjects.com)
+    * @author Lidong Liu (tmslld@gmail.com)
+    */
+    public class RtfFont : Font, IRtfExtendedElement {
+        /**
+        * Constant for the font family to use ("froman")
+        */
+        private static byte[] FONT_FAMILY = DocWriter.GetISOBytes("\\froman");
+        /**
+        * Constant for the charset
+        */
+        private static byte[] FONT_CHARSET = DocWriter.GetISOBytes("\\fcharset");
+        /**
+        * Constant for the font size
+        */
+        public static byte[] FONT_SIZE = DocWriter.GetISOBytes("\\fs");
+        /**
+        * Constant for the bold flag
+        */
+        private static byte[] FONT_BOLD = DocWriter.GetISOBytes("\\b");
+        /**
+        * Constant for the italic flag
+        */
+        private static byte[] FONT_ITALIC = DocWriter.GetISOBytes("\\i");
+        /**
+        * Constant for the underline flag
+        */
+        private static byte[] FONT_UNDERLINE = DocWriter.GetISOBytes("\\ul");
+        /**
+        * Constant for the strikethrough flag
+        */
+        private static byte[] FONT_STRIKETHROUGH = DocWriter.GetISOBytes("\\strike");
+        /**
+        * Constant for the double strikethrough flag
+        */
+        private static byte[] FONT_DOUBLE_STRIKETHROUGH = DocWriter.GetISOBytes("\\striked");
+        /**
+        * Constant for the shadow flag
+        */
+        private static byte[] FONT_SHADOW = DocWriter.GetISOBytes("\\shad");
+        /**
+        * Constant for the outline flag
+        */
+        private static byte[] FONT_OUTLINE = DocWriter.GetISOBytes("\\outl");
+        /**
+        * Constant for the embossed flag
+        */
+        private static byte[] FONT_EMBOSSED = DocWriter.GetISOBytes("\\embo");
+        /**
+        * Constant for the engraved flag
+        */
+        private static byte[] FONT_ENGRAVED = DocWriter.GetISOBytes("\\impr");
+        /**
+        * Constant for hidden text flag
+        */
+        private static byte[] FONT_HIDDEN = DocWriter.GetISOBytes("\\v");
+        
+        /**
+        * Constant for a plain font
+        */
+        public const int STYLE_NONE = 0;
+        /**
+        * Constant for a bold font
+        */
+        public const int STYLE_BOLD = 1;
+        /**
+        * Constant for an italic font
+        */
+        public const int STYLE_ITALIC = 2;
+        /**
+        * Constant for an underlined font
+        */
+        public const int STYLE_UNDERLINE = 4;
+        /**
+        * Constant for a strikethrough font
+        */
+        public const int STYLE_STRIKETHROUGH = 8;
+        /**
+        * Constant for a double strikethrough font
+        */
+        public const int STYLE_DOUBLE_STRIKETHROUGH = 16;
+        /**
+        * Constant for a shadowed font
+        */
+        public const int STYLE_SHADOW = 32;
+        /**
+        * Constant for an outlined font
+        */
+        public const int STYLE_OUTLINE = 64;
+        /**
+        * Constant for an embossed font
+        */
+        public const int STYLE_EMBOSSED = 128;
+        /**
+        * Constant for an engraved font
+        */
+        public const int STYLE_ENGRAVED = 256;
+        /**
+        * Constant for a font that hides the actual text.
+        */
+        public const int STYLE_HIDDEN = 512;
+
+        /**
+        * The font name. Defaults to "Times New Roman"
+        */
+        private String fontName = "Times New Roman";
+        /**
+        * The font size. Defaults to 10
+        */
+        private int fontSize = 10;
+        /**
+        * The font style. Defaults to STYLE_NONE
+        */
+        private int fontStyle = STYLE_NONE;
+        /**
+        * The number of this font
+        */
+        private int fontNumber = 0;
+        /**
+        * The colour of this font
+        */
+        private RtfColor color = null;
+        /**
+        * The character set to use for this font
+        */
+        private int charset = 0;
+        /**
+        * The RtfDocument this RtfFont belongs to.
+        */
+        protected RtfDocument document = null;
+        
+        /**
+        * Constructs a RtfFont with the given font name and all other properties
+        * at their default values.
+        * 
+        * @param fontName The font name to use
+        */
+        public RtfFont(String fontName) : base(Font.UNDEFINED, Font.UNDEFINED, Font.UNDEFINED, null) {
+            this.fontName = fontName;
+        }
+        
+        /**
+        * Constructs a RtfFont with the given font name and font size and all other
+        * properties at their default values.
+        * 
+        * @param fontName The font name to use
+        * @param size The font size to use
+        */
+        public RtfFont(String fontName, float size) : base(Font.UNDEFINED, size, Font.UNDEFINED, null) {
+            this.fontName = fontName;
+        }
+        
+        /**
+        * Constructs a RtfFont with the given font name, font size and font style and the
+        * default color.
+        * 
+        * @param fontName The font name to use
+        * @param size The font size to use
+        * @param style The font style to use
+        */
+        public RtfFont(String fontName, float size, int style) : base(Font.UNDEFINED, size, style, null) {
+            this.fontName = fontName;
+        }
+        
+        /**
+        * Constructs a RtfFont with the given font name, font size, font style and
+        * color.
+        * 
+        * @param fontName The font name to use
+        * @param size the font size to use
+        * @param style The font style to use
+        * @param color The font color to use
+        */
+        public RtfFont(String fontName, float size, int style, Color color) : base(Font.UNDEFINED, size, style, color) {
+            this.fontName = fontName;
+        }
+        
+        /**
+        * Constructs a RtfFont with the given font name, font size, font style, colour
+        * and charset. This can be used when generating non latin-1 text.
+        * 
+        * @param fontName The font name to use
+        * @param size the font size to use
+        * @param style The font style to use
+        * @param color The font color to use
+        * @param charset The charset of the font content
+        */
+        public RtfFont(String fontName, float size, int style, Color color, int charset) : this(fontName, size, style, color){
+            this.charset = charset;
+        }
+
+        /**
+        * Special constructor for the default font
+        *
+        * @param doc The RtfDocument this font appears in
+        * @param fontNumber The id of this font
+        */
+        protected internal RtfFont(RtfDocument doc, int fontNumber) {
+            this.document = doc;
+            this.fontNumber = fontNumber;
+            color = new RtfColor(doc, 0, 0, 0);
+        }
+
+        /**
+        * Constructs a RtfFont from a com.lowagie.text.Font
+        * @param doc The RtfDocument this font appears in
+        * @param font The Font to use as a base
+        */
+        public RtfFont(RtfDocument doc, Font font) {
+            this.document = doc;
+            if (font != null) {
+                if (font is RtfFont) {
+                    this.fontName = ((RtfFont) font).GetFontName();
+                    this.charset = ((RtfFont) font).GetCharset();
+                } else {
+                    SetToDefaultFamily(font.Familyname);
+                }
+                if (font.BaseFont != null) {
+                    String[][] fontNames = font.BaseFont.FullFontName;
+                    for (int i = 0; i < fontNames.Length; i++) {
+                        if (fontNames[i][2].Equals("0")) {
+                            this.fontName = fontNames[i][3];
+                            break;
+                        } else if (fontNames[i][2].Equals("1033") || fontNames[i][2].Equals("")) {
+                            this.fontName = fontNames[i][3];
+                        }
+                    }
+                }
+                Size = font.Size;
+                SetStyle(font.Style);
+                Color = font.Color;
+            }
+            if (Util.EqualsIgnoreCase(this.fontName, "unknown")) {
+                return;
+            }
+
+            if (document != null) {
+                SetRtfDocument(document);
+            }
+        }
+
+        /**
+        * Writes the font definition
+        */
+        public virtual void WriteDefinition(Stream result) {
+            byte[] t;
+            result.Write(FONT_FAMILY, 0, FONT_FAMILY.Length);
+            result.Write(FONT_CHARSET, 0, FONT_CHARSET.Length);
+            result.Write(t = IntToByteArray(charset), 0, t.Length);
+            result.Write(RtfElement.DELIMITER, 0, RtfElement.DELIMITER.Length);
+            document.FilterSpecialChar(result, fontName, true, false);
+        }
+
+        /**
+        * Writes the font beginning
+        *
+        * @return A byte array with the font start data
+        */
+        public virtual void WriteBegin(Stream result) {
+            byte[] t;
+            if(this.fontNumber != Font.UNDEFINED) {
+                result.Write(RtfFontList.FONT_NUMBER, 0, RtfFontList.FONT_NUMBER.Length);
+                result.Write(t = IntToByteArray(fontNumber), 0, t.Length);
+            }
+            if(this.fontSize != Font.UNDEFINED) {
+                result.Write(FONT_SIZE, 0, FONT_SIZE.Length);
+                result.Write(t = IntToByteArray(fontSize * 2), 0, t.Length);
+            }
+            if (this.fontStyle != UNDEFINED) {
+                if ((fontStyle & STYLE_BOLD) == STYLE_BOLD) {
+                    result.Write(FONT_BOLD, 0, FONT_BOLD.Length);
+                }
+                if ((fontStyle & STYLE_ITALIC) == STYLE_ITALIC) {
+                    result.Write(FONT_ITALIC, 0, FONT_ITALIC.Length);
+                }
+                if ((fontStyle & STYLE_UNDERLINE) == STYLE_UNDERLINE) {
+                    result.Write(FONT_UNDERLINE, 0, FONT_UNDERLINE.Length);
+                }
+                if ((fontStyle & STYLE_STRIKETHROUGH) == STYLE_STRIKETHROUGH) {
+                    result.Write(FONT_STRIKETHROUGH, 0, FONT_STRIKETHROUGH.Length);
+                }
+                if ((fontStyle & STYLE_HIDDEN) == STYLE_HIDDEN) {
+                    result.Write(FONT_HIDDEN, 0, FONT_HIDDEN.Length);
+                }
+                if ((fontStyle & STYLE_DOUBLE_STRIKETHROUGH) == STYLE_DOUBLE_STRIKETHROUGH) {
+                    result.Write(FONT_DOUBLE_STRIKETHROUGH, 0, FONT_DOUBLE_STRIKETHROUGH.Length);
+                    result.Write(t = IntToByteArray(1), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_SHADOW) == STYLE_SHADOW) {
+                    result.Write(FONT_SHADOW, 0, FONT_SHADOW.Length);
+                }
+                if ((fontStyle & STYLE_OUTLINE) == STYLE_OUTLINE) {
+                    result.Write(FONT_OUTLINE, 0, FONT_OUTLINE.Length);
+                }
+                if ((fontStyle & STYLE_EMBOSSED) == STYLE_EMBOSSED) {
+                    result.Write(FONT_EMBOSSED, 0, FONT_EMBOSSED.Length);
+                }
+                if ((fontStyle & STYLE_ENGRAVED) == STYLE_ENGRAVED) {
+                    result.Write(FONT_ENGRAVED, 0, FONT_ENGRAVED.Length);
+                }
+            }
+            if(color != null) {
+                color.WriteBegin(result);
+            }
+        }
+
+        /**
+        * Write the font end
+        *
+        */
+        public virtual void WriteEnd(Stream result) {
+            byte[] t;
+            if (this.fontStyle != UNDEFINED) {
+                if ((fontStyle & STYLE_BOLD) == STYLE_BOLD) {
+                    result.Write(FONT_BOLD, 0, FONT_BOLD.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_ITALIC) == STYLE_ITALIC) {
+                    result.Write(FONT_ITALIC, 0, FONT_ITALIC.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_UNDERLINE) == STYLE_UNDERLINE) {
+                    result.Write(FONT_UNDERLINE, 0, FONT_UNDERLINE.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_STRIKETHROUGH) == STYLE_STRIKETHROUGH) {
+                    result.Write(FONT_STRIKETHROUGH, 0, FONT_STRIKETHROUGH.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_HIDDEN) == STYLE_HIDDEN) {
+                    result.Write(FONT_HIDDEN, 0, FONT_HIDDEN.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_DOUBLE_STRIKETHROUGH) == STYLE_DOUBLE_STRIKETHROUGH) {
+                    result.Write(FONT_DOUBLE_STRIKETHROUGH, 0, FONT_DOUBLE_STRIKETHROUGH.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_SHADOW) == STYLE_SHADOW) {
+                    result.Write(FONT_SHADOW, 0, FONT_SHADOW.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_OUTLINE) == STYLE_OUTLINE) {
+                    result.Write(FONT_OUTLINE, 0, FONT_OUTLINE.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_EMBOSSED) == STYLE_EMBOSSED) {
+                    result.Write(FONT_EMBOSSED, 0, FONT_EMBOSSED.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+                if ((fontStyle & STYLE_ENGRAVED) == STYLE_ENGRAVED) {
+                    result.Write(FONT_ENGRAVED, 0, FONT_ENGRAVED.Length);
+                    result.Write(t = IntToByteArray(0), 0, t.Length);
+                }
+            }
+        }
+
+        /**
+        * unused
+        */
+        public virtual void WriteContent(Stream outp) {       
+        }
+        
+        /**
+        * Tests for equality of RtfFonts. RtfFonts are equal if their fontName,
+        * fontSize, fontStyle and fontSuperSubscript are equal
+        * 
+        * @param obj The RtfFont to compare with this RtfFont
+        * @return <code>True</code> if the RtfFonts are equal, <code>false</code> otherwise
+        */
+        public override bool Equals(Object obj) {
+            if (!(obj is RtfFont)) {
+                return false;
+            }
+            RtfFont font = (RtfFont) obj;
+            bool result = true;
+            result = result & this.fontName.Equals(font.GetFontName());
+            return result;
+        }
+
+        /**
+        * Returns the hash code of this RtfFont. The hash code is the hash code of the
+        * string containing the font name + font size + "-" + the font style + "-" + the
+        * font super/supscript value.
+        * 
+        * @return The hash code of this RtfFont
+        */
+        public override int GetHashCode() {
+            return (this.fontName + this.fontSize + "-" + this.fontStyle).GetHashCode();
+        }
+        
+        /**
+        * Gets the font name of this RtfFont
+        * 
+        * @return The font name
+        */
+        public String GetFontName() {
+            return this.fontName;
+        }
+
+        /**
+        * Sets the font name of this RtfFont.
+        * 
+        * @param fontName The font name to use 
+        */
+        public virtual void SetFontName(String fontName) {
+            this.fontName = fontName;
+            if(document != null) {
+                this.fontNumber = document.GetDocumentHeader().GetFontNumber(this);
+            }
+        }
+        /**
+        * @see com.lowagie.text.Font#getFamilyname()
+        */
+        public override String Familyname {
+            get {
+                return this.fontName;
+            }
+        }
+        
+        /**
+        * @see com.lowagie.text.Font#setFamily(String)
+        */
+        public override void SetFamily(String family){
+            base.SetFamily(family);
+            SetToDefaultFamily(family);
+        }
+        
+        /**
+        * Sets the correct font name from the family name.
+        * 
+        * @param familyname The family name to set the name to.
+        */
+        private void SetToDefaultFamily(String familyname){
+            switch (Font.GetFamilyIndex(familyname)) {
+                case Font.COURIER:
+                    this.fontName = "Courier";
+                    break;
+                case Font.HELVETICA:
+                    this.fontName = "Arial";
+                    break;
+                case Font.SYMBOL:
+                    this.fontName = "Symbol";
+                    this.charset = 2;
+                    break;
+                case Font.TIMES_ROMAN:
+                    this.fontName = "Times New Roman";
+                    break;
+                case Font.ZAPFDINGBATS:
+                    this.fontName = "Windings";
+                    break;
+                default:
+                    this.fontName = familyname;
+                    break;
+            }
+        }
+        
+        /**
+        * Gets the font size of this RtfFont
+        * 
+        * @return The font size
+        */
+        public int GetFontSize() {
+            return this.fontSize;
+        }
+        
+        /**
+        * @see com.lowagie.text.Font#setSize(float)
+        */
+        public override float Size {
+            set {
+                base.Size = value;
+                this.fontSize = (int)Size;
+            }
+        }
+
+        /**
+        * Gets the font style of this RtfFont
+        * 
+        * @return The font style
+        */
+        public int GetFontStyle() {
+            return this.fontStyle;
+        }
+        
+        /**
+        * @see com.lowagie.text.Font#setStyle(int)
+        */
+        public override void SetStyle(int style){
+            base.SetStyle(style);
+            this.fontStyle = Style;
+        }
+        
+        /**
+        * @see com.lowagie.text.Font#setStyle(String)
+        */
+        public override void SetStyle(String style) {
+            base.SetStyle(style);
+            fontStyle = Style;
+        }
+
+        /**
+        * Gets the charset used for constructing this RtfFont.
+        * 
+        * @return The charset of this RtfFont.
+        */
+        public int GetCharset() {
+            return charset;
+        }
+
+        /**
+        * Sets the charset used for constructing this RtfFont.
+        * 
+        * @param charset The charset to use.
+        */
+        public void SetCharset(int charset) {
+            this.charset = charset;
+        }
+
+        /**
+        * Gets the font number of this RtfFont
+        * 
+        * @return The font number
+        */
+        public int GetFontNumber() {
+            return fontNumber;
+        }
+
+        /**
+        * Sets the RtfDocument this RtfFont belongs to
+        * 
+        * @param doc The RtfDocument to use
+        */
+        public void SetRtfDocument(RtfDocument doc) {
+            this.document = doc;
+            if (document != null) {
+                this.fontNumber = document.GetDocumentHeader().GetFontNumber(this);
+            }
+            if (this.color != null) {
+                this.color.SetRtfDocument(this.document);
+            }
+        }
+
+        /**
+        * Unused
+        * @param inTable
+        */
+        public void SetInTable(bool inTable) {
+        }
+        
+        /**
+        * Unused
+        * @param inHeader
+        */
+        public void SetInHeader(bool inHeader) {
+        }
+
+        /**
+        * @see com.lowagie.text.Font#setColor(Color)
+        */
+        public override Color Color {
+            set {
+                base.Color = value;
+                if(value != null) {
+                    this.color = new RtfColor(document, value);
+                } else {
+                    this.color = null;
+                }
+            }
+        }
+        
+        /**
+        * @see com.lowagie.text.Font#setColor(int, int, int)
+        */
+        public override void SetColor(int red, int green, int blue) {
+            base.SetColor(red,green,blue);
+            this.color = new RtfColor(document, red, green, blue);
+        }
+
+        /**
+        * Transforms an integer into its String representation and then returns the bytes
+        * of that string.
+        *
+        * @param i The integer to convert
+        * @return A byte array representing the integer
+        */
+        protected byte[] IntToByteArray(int i) {
+            return DocWriter.GetISOBytes(i.ToString());
+        }
+
+        /**
+        * Replaces the attributes that are equal to <VAR>null</VAR> with
+        * the attributes of a given font.
+        *
+        * @param font The surrounding font
+        * @return A RtfFont
+        */
+        public override Font Difference(Font font) {
+            String dFamilyname = font.Familyname;
+            if (dFamilyname == null || dFamilyname.Trim().Equals("") || Util.EqualsIgnoreCase(dFamilyname.Trim(), "unknown")) {
+                dFamilyname = this.fontName;
+            }
+
+            float dSize = font.Size;
+            if (dSize == Font.UNDEFINED) {
+                dSize = this.Size;
+            }
+
+            int dStyle = Font.UNDEFINED;
+            if (this.Style != Font.UNDEFINED && font.Style != Font.UNDEFINED) {
+                dStyle = this.Style | font.Style;
+            } else if (this.Style != Font.UNDEFINED) {
+                dStyle = this.Style;
+            } else if (font.Style != Font.UNDEFINED) {
+                dStyle = font.Style;
+            }
+
+            Color dColor = font.Color;
+            if (dColor == null) {
+                dColor = this.Color;
+            }
+
+            int dCharset = this.charset;
+            if(font is RtfFont) {
+                dCharset = ((RtfFont)font).GetCharset();
+            }
+            
+            return new RtfFont(dFamilyname, dSize, dStyle, dColor, dCharset);
+        }
+
+        /**
+        * The <code>RtfFont</code> is never a standard font.
+        * 
+        * @since 2.1.0
+        */
+        public override bool IsStandardFont() {
+            return false;
+        }
+        
+        /**
+        * Compares this <code>RtfFont</code> to either a {@link com.lowagie.text.Font} or
+        * an <code>RtfFont</code>.
+        * 
+        * @since 2.1.0
+        */
+        public override int CompareTo(Object obj) {
+            if (obj == null) {
+                return -1;
+            }
+            if(obj is RtfFont) {
+                if(this.GetFontName().CompareTo(((RtfFont) obj).GetFontName()) != 0) {
+                    return 1;
+                } else {
+                    return base.CompareTo(obj);
+                }
+            } else if (obj is Font) {
+                return base.CompareTo(obj);
+            } else {
+                return -3;
+            }
+        }
+    }
+}