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Java > Open Source Codes > org > apache > fop > render > awt > FontMetricsMapper


1 /*
2  * $Id: FontMetricsMapper.java,v 1.3.2.4 2003/02/25 14:39:34 jeremias Exp $
3  * ============================================================================
4  * The Apache Software License, Version 1.1
5  * ============================================================================
6  *
7  * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without modifica-
10  * tion, are permitted provided that the following conditions are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright notice,
13  * this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  *
19  * 3. The end-user documentation included with the redistribution, if any, must
20  * include the following acknowledgment: "This product includes software
21  * developed by the Apache Software Foundation (http://www.apache.org/)."
22  * Alternately, this acknowledgment may appear in the software itself, if
23  * and wherever such third-party acknowledgments normally appear.
24  *
25  * 4. The names "FOP" and "Apache Software Foundation" must not be used to
26  * endorse or promote products derived from this software without prior
27  * written permission. For written permission, please contact
28  * apache@apache.org.
29  *
30  * 5. Products derived from this software may not be called "Apache", nor may
31  * "Apache" appear in their name, without prior written permission of the
32  * Apache Software Foundation.
33  *
34  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37  * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
38  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
39  * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44  * ============================================================================
45  *
46  * This software consists of voluntary contributions made by many individuals
47  * on behalf of the Apache Software Foundation and was originally created by
48  * James Tauber <jtauber@jtauber.com>. For more information on the Apache
49  * Software Foundation, please see <http://www.apache.org/>.
50  */
51 package org.apache.fop.render.awt;
52
53 // Java
54 import java.net.URL JavaDoc;
55 import java.awt.Graphics2D JavaDoc;
56 import java.awt.Font JavaDoc;
57
58 /**
59  * This class implements org.apache.fop.layout.FontMetric and
60  * is added to the hash table in FontInfo. It deferes the
61  * actual calculation of the metrics to
62  * AWTFontMetrics. It only keeps the java name and
63  * style as member varibles
64  */
65
66 public class FontMetricsMapper implements org.apache.fop.layout.FontMetric {
67
68     /**
69      * The first and last non space-character
70      */
71     private static final int FIRST_CHAR = 32;
72     private static final int LAST_CHAR = 255;
73
74     /**
75      * This is a AWTFontMetrics that does the real calculation.
76      * It is only one class that dynamically determines the font-size.
77      */
78     private static AWTFontMetrics metric = null;
79
80     /**
81      * The java name of the font.
82      * # Make the family name immutable.
83      */
84     private final String JavaDoc family;
85
86     /**
87      * The java style of the font.
88      * # Make the style immutable.
89      */
90     private final int style;
91
92     /**
93      * Constructs a new Font-metrics.
94      * @param family the family name of the font (java value)
95      * @param style the java type style value of the font
96      * @param parent an AWT component - this is needed so
97      * that we can get an instance of
98      * java.awt.FontMetrics
99      */
100     public FontMetricsMapper(String JavaDoc family, int style, Graphics2D JavaDoc graphics) {
101         this.family = family;
102         this.style = style;
103         if (metric == null)
104             metric = new AWTFontMetrics(graphics);
105     }
106
107     /**
108      * Create Original Font.
109      * @param fontURL URL to truetype font
110      */
111     public void setEmbedFont(URL JavaDoc fontURL) {
112         metric.setEmbedFont(family, style, fontURL);
113     }
114
115     /**
116      * Determines the font ascent of the Font described by this
117      * FontMetrics object
118      * @return ascent in milliponts
119      */
120     public int getAscender(int size) {
121         return metric.getAscender(family, style, size);
122     }
123
124
125     /**
126      * The size of a capital letter measured from the font's baseline
127      */
128     public int getCapHeight(int size) {
129         return metric.getCapHeight(family, style, size);
130     }
131
132     /**
133      * Determines the font descent of the Font described by this
134      * FontMetrics object
135      * @return descent in milliponts
136      */
137     public int getDescender(int size) {
138         return metric.getDescender(family, style, size);
139     }
140
141     /**
142      * Determines the typical font height of this
143      * FontMetrics object
144      * @return font height in milliponts
145      */
146     public int getXHeight(int size) {
147         return metric.getXHeight(family, style, size);
148     }
149
150
151     public int getFirstChar() {
152         return FIRST_CHAR;
153     }
154
155     public int getLastChar() {
156         return LAST_CHAR;
157     }
158
159     /**
160      * return width (in 1/1000ths of point size) of character at
161      * code point i.
162      */
163     public int width(int i, int size) {
164         return metric.width(i, family, style, size);
165     }
166
167
168     /**
169      * return width (in 1/1000ths of point size) of all character
170      */
171     public int[] getWidths(int size) {
172         return metric.getWidths(family, style, size);
173     }
174
175     /**
176      * Gets a Font instance of the Font that this
177      * FontMetrics describes in the desired size.
178      * @return font with the desired characeristics.
179      */
180     public Font JavaDoc getFont(int size) {
181         return metric.getFont(family, style, size);
182     }
183
184 }
185
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