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Java > Open Source Codes > org > apache > fop > datatypes > Length


1 /*
2  * $Id: Length.java,v 1.14.2.1 2003/02/25 10:48:28 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.datatypes;
52
53 import org.apache.fop.fo.expr.Numeric;
54
55 /**
56  * a length quantity in XSL
57  */

58 public class Length {
59
60     protected int millipoints = 0;
61     protected boolean bIsComputed = false;
62
63     /**
64      * return the length in 1/1000ths of a point
65      */

66     public int mvalue() {
67         if (!bIsComputed) {
68             computeValue();
69         }
70         return millipoints;
71     }
72
73     protected void computeValue() {
74     }
75
76
77     protected void setComputedValue(int millipoints) {
78         setComputedValue(millipoints, true);
79     }
80
81     protected void setComputedValue(int millipoints, boolean bSetComputed) {
82         this.millipoints = millipoints;
83         this.bIsComputed = bSetComputed;
84     }
85
86     public boolean isAuto() {
87         return false;
88     }
89
90     public boolean isComputed() {
91         return this.bIsComputed;
92     }
93
94     /**
95      * Return the number of table units which are included in this
96      * length specification.
97      * This will always be 0 unless the property specification used
98      * the proportional-column-width() function (only only table
99      * column FOs).
100      * <p>If this value is not 0, the actual value of the Length cannot
101      * be known without looking at all of the columns in the table to
102      * determine the value of a "table-unit".
103      * @return The number of table units which are included in this
104      * length specification.
105      */

106     public double getTableUnits() {
107         return 0.0;
108     }
109
110     public void resolveTableUnit(double dTableUnit) {
111     }
112
113     public Numeric asNumeric() {
114         return null;
115     }
116
117     public String JavaDoc toString() {
118         String JavaDoc s = millipoints + "mpt";
119         return s;
120     }
121
122 }
123
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