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Java > Open Source Codes > org > apache > fop > fo > MarginShorthandParser


1 /*
2  * $Id: MarginShorthandParser.java,v 1.1.2.4 2003/02/25 12:56:54 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.fo;
52
53 import java.util.ArrayList JavaDoc;
54
55 public class MarginShorthandParser implements ShorthandParser {
56
57     protected ArrayList JavaDoc list; // ArrayList of Property objects
58
59     public MarginShorthandParser(ListProperty listprop) {
60         this.list = listprop.getList();
61     }
62
63     protected Property getElement(int index) {
64         if (list.size() > index)
65             return (Property)list.get(index);
66         else
67             return null;
68     }
69
70     protected int count() {
71         return list.size();
72     }
73
74     // Stores 1 to 4 values for margin-top, -right, -bottom or -left
75 public Property getValueForProperty(String JavaDoc propName,
76                                         Property.Maker maker,
77                                         PropertyList propertyList) {
78         Property prop = null;
79         // Check for keyword "inherit"
80 if (count() == 1) {
81             String JavaDoc sval = ((Property)list.get(0)).getString();
82             if (sval != null && sval.equals("inherit")) {
83                 return propertyList.getFromParent(propName);
84             }
85         }
86         return convertValueForProperty(propName, maker, propertyList);
87     }
88
89
90     protected Property convertValueForProperty(String JavaDoc propName,
91             Property.Maker maker,
92             PropertyList propertyList) {
93         Property prop = null;
94         int idx = 0;
95
96         switch (count())
97         {
98         case 1: //
99 idx = 0;
100             break;
101         case 2: // 1st value top/bottom, 2nd value left/right
102 if (propName.equals("margin-top") ||
103                     propName.equals("margin-bottom"))
104                 idx = 0;
105             else
106                 idx = 1;
107             break;
108         case 3: // 1st value top, 2nd left/right, 3rd bottom
109 if (propName == "margin-top")
110                 idx = 0;
111             else if (propName.equals("margin-bottom"))
112                 idx = 2;
113             else
114                 idx = 1;
115             break;
116         case 4: // top, right, bottom, left
117 if (propName.equals("margin-top"))
118                 idx = 0;
119             else if (propName.equals("margin-right"))
120                 idx = 1;
121             else if (propName.equals("margin-bottom"))
122                 idx = 2;
123             else if (propName.equals("margin-left"))
124                 idx = 3;
125             break;
126         default:
127             // TODO Error Message: Wrong number of args
128 return null;
129         }
130
131         Property p = getElement(idx);
132         prop = maker.convertShorthandProperty(propertyList, p, null);
133         return prop;
134     }
135
136 }
137
138
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