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Java > Open Source Codes > com > lowagie > text > pdf > PdfFont


1 /*
2  * $Id: PdfFont.java 2742 2007-05-08 13:04:56Z blowagie $
3  * $Name$
4  *
5  * Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
6  *
7  * The contents of this file are subject to the Mozilla Public License Version 1.1
8  * (the "License"); you may not use this file except in compliance with the License.
9  * You may obtain a copy of the License at http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the License.
14  *
15  * The Original Code is 'iText, a free JAVA-PDF library'.
16  *
17  * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
18  * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
19  * All Rights Reserved.
20  * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
21  * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
22  *
23  * Contributor(s): all the names of the contributors are added in the source code
24  * where applicable.
25  *
26  * Alternatively, the contents of this file may be used under the terms of the
27  * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
28  * provisions of LGPL are applicable instead of those above. If you wish to
29  * allow use of your version of this file only under the terms of the LGPL
30  * License and not to allow others to use your version of this file under
31  * the MPL, indicate your decision by deleting the provisions above and
32  * replace them with the notice and other provisions required by the LGPL.
33  * If you do not delete the provisions above, a recipient may use your version
34  * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Library General Public License as published by the Free Software Foundation;
39  * either version 2 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
43  * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
44  * details.
45  *
46  * If you didn't download this code from the following link, you should check if
47  * you aren't using an obsolete version:
48  * http://www.lowagie.com/iText/
49  */
50
51 package com.lowagie.text.pdf;
52
53 import com.lowagie.text.ExceptionConverter;
54 import com.lowagie.text.Image;
55
56 /**
57  * <CODE>PdfFont</CODE> is the Pdf Font object.
58  * <P>
59  * Limitation: in this class only base 14 Type 1 fonts (courier, courier bold, courier oblique,
60  * courier boldoblique, helvetica, helvetica bold, helvetica oblique, helvetica boldoblique,
61  * symbol, times roman, times bold, times italic, times bolditalic, zapfdingbats) and their
62  * standard encoding (standard, MacRoman, (MacExpert,) WinAnsi) are supported.<BR>
63  * This object is described in the 'Portable Document Format Reference Manual version 1.3'
64  * section 7.7 (page 198-203).
65  *
66  * @see PdfName
67  * @see PdfDictionary
68  * @see BadPdfFormatException
69  */
70
71 class PdfFont implements Comparable JavaDoc {
72     
73     
74     /** the font metrics. */
75     private BaseFont font;
76     
77     /** the size. */
78     private float size;
79     
80     /** an image. */
81     protected Image image;
82     
83     protected float hScale = 1;
84     
85     // constructors
86
87     PdfFont(BaseFont bf, float size) {
88         this.size = size;
89         font = bf;
90     }
91     
92     // methods
93
94     /**
95      * Compares this <CODE>PdfFont</CODE> with another
96      *
97      * @param object the other <CODE>PdfFont</CODE>
98      * @return a value
99      */
100     
101     public int compareTo(Object JavaDoc object) {
102         if (image != null)
103             return 0;
104         if (object == null) {
105             return -1;
106         }
107         PdfFont pdfFont;
108         try {
109             pdfFont = (PdfFont) object;
110             if (font != pdfFont.font) {
111                 return 1;
112             }
113             if (this.size() != pdfFont.size()) {
114                 return 2;
115             }
116             return 0;
117         }
118         catch(ClassCastException JavaDoc cce) {
119             return -2;
120         }
121     }
122     
123     /**
124      * Returns the size of this font.
125      *
126      * @return a size
127      */
128     
129     float size() {
130         if (image == null)
131             return size;
132         else {
133             return image.getScaledHeight();
134         }
135     }
136     
137     /**
138      * Returns the approximative width of 1 character of this font.
139      *
140      * @return a width in Text Space
141      */
142     
143     float width() {
144         return width(' ');
145     }
146     
147     /**
148      * Returns the width of a certain character of this font.
149      *
150      * @param character a certain character
151      * @return a width in Text Space
152      */
153     
154     float width(char character) {
155         if (image == null)
156             return font.getWidthPoint(character, size) * hScale;
157         else
158             return image.getScaledWidth();
159     }
160     
161     float width(String JavaDoc s) {
162         if (image == null)
163             return font.getWidthPoint(s, size) * hScale;
164         else
165             return image.getScaledWidth();
166     }
167     
168     BaseFont getFont() {
169         return font;
170     }
171     
172     void setImage(Image image) {
173         this.image = image;
174     }
175     
176     static PdfFont getDefaultFont() {
177         try {
178             BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, false);
179             return new PdfFont(bf, 12);
180         }
181         catch (Exception JavaDoc ee) {
182             throw new ExceptionConverter(ee);
183         }
184     }
185     void setHorizontalScaling(float hScale) {
186         this.hScale = hScale;
187     }
188 }
189
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