aboutsummaryrefslogtreecommitdiffstats
path: root/src/java/org/apache/fop/fo/properties/PercentLength.java
blob: 7d58df8d23fed378fd67c3a1d08018a18334ff38 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/*
 * $Id$
 * ============================================================================
 *                    The Apache Software License, Version 1.1
 * ============================================================================
 *
 * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. The end-user documentation included with the redistribution, if any, must
 *    include the following acknowledgment: "This product includes software
 *    developed by the Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself, if
 *    and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "FOP" and "Apache Software Foundation" must not be used to
 *    endorse or promote products derived from this software without prior
 *    written permission. For written permission, please contact
 *    apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache", nor may
 *    "Apache" appear in their name, without prior written permission of the
 *    Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
 * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ============================================================================
 *
 * This software consists of voluntary contributions made by many individuals
 * on behalf of the Apache Software Foundation and was originally created by
 * James Tauber <jtauber@jtauber.com>. For more information on the Apache
 * Software Foundation, please see <http://www.apache.org/>.
 */
package org.apache.fop.fo.properties;

import org.apache.fop.datatypes.PercentBase;
import org.apache.fop.fo.expr.NumericProperty;

/**
 * a percent specified length quantity in XSL
 */
public class PercentLength extends LengthProperty {

    /**
     * The percentage itself, expressed as a decimal value, e.g. for 95%, set
     * the value to .95
     */
    private double factor;

    /**
     * A PercentBase implementation that contains the base length to which the
     * {@link #factor} should be applied to compute the actual length
     */
    private PercentBase lbase = null;

    /**
     * Main constructor. Construct an object based on a factor (the percent,
     * as a factor) and an object which has a method to return the Length which
     * provides the "base" for the actual length that is modeled.
     * @param factor the percentage factor, expressed as a decimal (e.g. use
     * .95 to represent 95%)
     * @param lbase base property to which the factor should be applied
     */
    public PercentLength(double factor, PercentBase lbase) {
        this.factor = factor;
        this.lbase = lbase;
    }

    /**
     * Convenience constructor when only the factor is known
     * @param factor the percentage factor, expressed as a decimal (e.g. use
     * .95 to represent 95%)
     */
    public PercentLength(double factor) {
        this(factor, null);
    }

    /**
     * @param lbase the base to set
     */
    public void setBaseLength(PercentBase lbase) {
        this.lbase = lbase;
    }

    /**
     * @return the base
     */
    public PercentBase getBaseLength() {
        return this.lbase;
    }

    /**
     * Return the computed value in millipoints. This assumes that the
     * base length has been resolved to an absolute length value.
     */
    protected void computeValue() {
        setComputedValue((int)(factor * (double)lbase.getBaseLength()));
    }

    /**
     *
     * @return the factor
     */
    public double value() {
        return factor;
    }

    /**
     * @return the String equivalent of this
     */
    public String toString() {
        // TODO: What about the base value?
        return (new Double(factor * 100.0).toString()) + "%";
    }

    /**
     * @return new Numeric object that is equivalent to this
     */
    public NumericProperty asNumeric() {
        return new NumericProperty(this);
    }

}